Dupont Delrin rod and Acetal Rods

Many of our clients assume that Delrin rod and Acetal rod is the same thing. This is not quite true. Yes, all Delrin rod is Acetal rod, but not all Acetal rod is Delrin rod. Delrin is a trade name for Homo-Polymer Acetal made by Dupont. This is the most recognized of all Acetal materials, but far from the only available Acetal material.Black and Natural Acetal - Delrin Rod
The Co-Polymer Acetal is produced by a wide variety of large plastic manufacturers, BASF is probably one of the largest and most well known. Some main resin names are: BASF Ultraform H4320, Kepital F10-02, or Hostaform M25. While Delrin is a wonderful material, in larger cross sections or larger diameters, the Delrin brand Homo-Polymer can exhibit center line porosity. This can sometimes be seen with the naked eye, and is a darker white in a normally milky white natural colored material. This center line porosity can cause problems in some applications. This porosity can cause leakage of fluid if under pressure, or ‘soft centers’ of Delrin Rod and Delrin Sheet.

This should not stop you from considering Delrin though. Many other properties of the Delrin resin are superior to the Co-Polymer resins. These properties are:

General Property ASTM
Test
Typical Value
Unfilled Delrin®

Homo-Polymer
Typical Value
Unfilled Co-Polymer
Specific Gravity D792 1.42 1.40
Tensile Strength Yield D638 9,600 – 11,000 9,000 – 10,200
Tensile Modulus D638 450,000 400,000
Izod Impact – Notched D256 1.2 1.0
Hardness – Rockwell D785 M94 M90
Deflection Temp @ 264psi D648 257 220
Deflection Temp @ 66 psi D648 347 335
Water Absorption @ 24 hrs
% 0.24 0.25
Co. Thermal Expansion D696 6.83X10-5 5.4X10-5

The key properties that Delrin are: higher tensile strength, increased Izod impact, higher deflection temperatures and it is slightly harder. The co-efficient of thermal expansion is a bit higher, and needs to be considered when designing a new part. Delrin brand material also comes in several resin variations, including: Delrin 150 and Delrin 507, contact us for details.

Many of our clients prefer the Delrin brand rod and sheet for small machined parts. This is due to the increase in a few key properties, and of course brand recognition. Both resins meet the standard ASTM-D-6778, and the cancelled specs, L-P-395 and ASTM-D-4181.Colored Acetal - Delrin Rod - Pomalux

The Acetal family of plastic resins are excellent for wear resistance, great mechanical strength, and superior machining properties. It is available in a huge range of sizes and shapes. Click here for more details on Acetal – Delrin Rod, and sometimes referred to as plastic dowel. We also have the capacity to supply colored Acetal – Delrin rod; click here from more details on the colored Acetal material.

Similar materials to Acetal – Delrin are Nylon Rod, PET Rod and Noryl Rod. Most materials are available as round rod, square rod, bar, strip, sheet and plate.

Please contact us for more details on these and other plastic materials. For a comparison chart of plastic materials click here: Plastic Materials Selection Guide

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Large engineering plastic from Gehr Plastics

One of our secret claims to fame

Since 1975 we have provided large diameter plastic rods and thick plastic sheets, plates, slabs and blocks. One of our long time ‘secret’ sources has been Gehr Plastics. Since 1932 the Gehr family has owned and operated the Gehr Plastics company. They are a worldwide leader in semi-finished plastic shapes in thermoplastics, primarily sheet and rod. The headquarters for Gehr Plastics is in Mannheim, in south western Germany. For almost 30 years, Gehr Plastics has had production facilities in the Philadelphia area, providing the USA with the same high quality plastic shapes. When we mention large diameter rod, we mean it! Gehr can produce plastic rod up to almost 20″ diameter in several grades of plastic. They also produce sheet plastics up to 8″ thick, and make the largest materials of most manufacturers of plastic sheets and rods.

At Gehr Plastics, Quality Engineering Plastic Comes First

Our first purchases with Gehr Plastics was in the PVC rod family. Once again, they make huge cross sections in many materials, including the PVC rod. Many manufacturers struggle with large sections of PVC rod because keeping it void free throughout the large diameter is very difficult. Not for Gehr Plastics, they specialize in engineering plastic materials. We have chosen this high quality manufacture for their exceptional product quality. We know the demands of our client base, and only choose the best factories to supply our products. Gehr is definitely one of the premier plastics producers in the world. While the quality of the PVC rod is excellent, the rest of the Gehr Plastics product line is also some of the best plastic semi-finished shapes available in the market place. Here is a list of some of the many materials that Gehr Plastic produces:

Many of the above items are also available in sheets, plates, slabs or blocks.Gehr Plastics PVC, ABS, POM-C, Acetal and Ultem Rods engineering plastic specialists

Gehr Plastics – one of our engineering plastic partners

We have been proud to offer the complete line of plastic rod, sheet, slab, plate and block from Gehr Plastics, and consider them a highly valued partner in supplying these engineering plastic materials to you, our valued client. For more information on the size range, availability and pricing on these and other plastic materials, click here or call us at 866-832-9315

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Topic: Gehr Plastics – supplier of engineering plastic materials



PLASTICS IN THE MEDICAL FIELD Polyethylene Bags

When we think of plastic, we think of plastic bags you get at the grocery store or maybe your child’s toy that’s made out of cheap throw away material. If you stop and think about it, plastic is everywhere and it’s uses are almost infinite. Take Acetal or Delrin® ( a Dupont brand name) as it is more commonly know. It is a plastic that replaces metal in numerous applications and is used to make gears, screws and other hard working parts. Consider PTFE for instance which is used to coat your frying pan to make it non-stick, make steam valves and fittings, and chemical resistant parts. Another material is Polycarbonate or Lexan® (a SABIC brand name -formerly G.E. Plastics) which is used to replace glass because it is shatter resistant and is also used for bullet resistant glazing and riot shields. Even the cup of coffee you grab for every morning is made of foamed Styrene – Styrofoam. But plastic has shaped our lives in countless ways, many of them you might not even think of or notice.

Plastic used in medical replacements for limbsPlastics play a big part in the world of medicine. Some other advancements in the area of medicine include assisting people with debilitating injuries and serious afflictions, helping them feel more comfortable and move easier. Prosthetic limbs and joint replacements have come along way since the old days of metal and wood. Since the late 90’s UHMW or (Ultra High Molecular Weight Polyethylene) has become the standard in hip and joint replacements. With plastics like UHMW, which has great wear resistance, excellent strength and very low co-efficient of friction (very slippery), it has made people who need these surgeries have better mobility and better quality of life. These plastics also make prosthetic limbs lighter and stronger for athletes who wish to compete and lead near normal active lifestyles due to the use of plastic polymers (derived from the Greek meaning ‘many parts’) mimicking human flexibility. Prosthetic devices date all the way back to the ancient Egyptians where they used leather and wood for toe and foot replacements. But thanks to today’s technologies and advancements in as plastic, most amputees and athletes can regain their quality of life and enabling them to do what they love.

What has Medical Plastic Done For You Lately?

Another plastic material that has changed the medical field is PEEK (Polyetheretherketone). This material is a newer plastic which has high Natural PEEK Medical Grade Rodchemical resistance along with excellent high continuous temperature resistance of up to 480 degrees fahrenheit. PEEK has replaced many metal devices in the medical field, because PEEK is one of the only thermoplastics (plastic which can be bent or shaped) able to withstand high doses of radiation over an extended lifetime. In addition PEEK is used to help many people awaiting kidney transplants because it is used to make a critical component in dialysis machines. These machines need to clean the blood over a period of several hours and because of this, PEEK is the natural solution, as it can be steam cleaned time and time again with little effect on the material. Along with its great chemical, temperature, and fluid handling stability, PEEK is USP Class VI, making it ideal for these types of medical applications. The natural color of PEEK is a beige to tan and is available in sheet and rod. One of the largest manufacturers of PEEK resin is Victrex and their 450G resin.

Plastics In Medicine – Everyday

Plastic materials have become apart of our lives and has changed the way we take care of the sick and injured, how we protect our foods from germs, and prolong the storage of foods. Plastics protect medical instruments and insure they are sterile. It has made people’s lives better in both the short and long term. It has helped reduce pain, gain better movement and has given people their confidence back. The values of plastic can not be understated and in the future, hopefully plastics will save or prolong many more lives through advancements in technology and the limitless possibilities it presents.

For more information on these and other medical grade plastics like: Clear Nylon (look for blog post on this), Ultem, Polysulfone, Radel and more, contact us. E-mail us or call 866-832-9315

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Types of PVC Sheet

Most of our clients are surprised that PVC is available in sheet form. They are generally all familiar with PVC Pipe and its uses, but didn’t think they could get the same material in sheet or rod. PVC or Poly-Vinyl-Chloride is a tough and chemical resistant material. We do stock a large variety of PVC grades in both sheet and rod.

PVC sheet is a standard industrial plastic material. The most common color of this material is a dark gray. Although it is also available in white and clear. Other grades of PVC are also available including: materials that meet the FM49Boltaron is leading manufacture of PVC Sheet materails10 ratings, forming grades, multiple styles of textured surfaces, high heat, PVC/Acrylic Alloys (AKA Kydex), CPVC, Aircraft and FAA grades (including Boltaron’s FAR 25.853 ‘a’ and ‘d’ rated materials), ASTM D-1784 certified materials and many more.

PVC sheet – standard Type 1 grade is a tough, machinable, bondable material, that is very chemical resistant and has a UL 94 V-0 rating. This exceptional flame rating combined with excellent bonding and machining make PVC Sheet a perfect plastic ‘building block’ for hundreds of applications.

Many Grades of PVC Sheet Available

The specialty grades are numerous, over 50 different materials, and the world leader in these materials is Boltaron. Since 1954 they have been leading the field of PVC product production and innovation. PVC Sheet manufacturer - Boltaron, since 1954

PVC Sheet – Type 1 is stocked from .062″ – 3.0″ thick sheet, PVC Rod is also available from .250″ – 9.0″ diameter. White PVC sheet and some Clear PVC sheets are also available from stock.

Standard sheet size is 48″ X 96″, however we cut this material to size, to blanks or parts. Type 1 Gray PVC Rod is stocked in 5 foot and 10 foot lengths, and can be purchased by the foot. Foamed PVC sheet, sometimes called Sintra or Komatex is stocked in several thicknesses in white and black.  Other colors and grades available with special order.

With the incredible width and breadth of PVC sheet products available, please contact us for data sheets on specific Boltaron products. Email us or call us, 866-832-9315

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Which Plastics are Recyclable?Pile Of Plastic Bottles and Containers

Over the last 50 years or so since plastic became more and more prevalent, over one billion tons of it has been disposed of and that number only continues to grow. Plastic, because of its molecular structure does take along time to decompose and cannot be burned due to it releasing harmful toxins and pollutants into the air. However since the mid 1990’s, plastic recycling has become more advanced and a greater awareness has been established. Since this time though, new technologies have been implemented making it easier to recycle and making people more conscious to do so. Curbside containers and designated recycling stations have vastly improved the way we dispose of these materials. These programs helped pave the way for a new era where plastics are less likely to be littered on the side of the road and to make it easier to be reused over and over again saving money, energy and helping the environment.

Some of the main plastics which can be recyclable are:Recycle Number Triangles

Polyester or PET carries the number 1 symbol. This plastic is primarily used for soft drink bottles. It is the easiest to recycle plastic and can be reground and reused time and time again.

The plastic with the number 2 symbol on it is HDPE which is a plastic primarily used for grocery bags, milk jugs and laundry detergent bottles.

PVC has the number 3 symbol and is used for pipes, fences and non-food containers.

LDPE is number 4 and is used for tubing, caps, rings and shrink wrap (coffee can lids).

Polypropylene has the number 5 symbol and its uses are for automotive parts, food containers and dishware.

Polystyrene is number 6 and is used for food containers and cups (including Styrofoam).

7 is other material such as Acrylic, fiberglass and Polycarbonate. These plastics are used for lenses, glasses and shields.

ABS is the number 9 symbol and is used in automotive, model building and molded parts.

Join the grass roots groups to recycle

Many schools and organizations work to collect and recycle materials, including plastics and aluminum cans. The biggest problem with plastic recycling is that it needs to be so meticulously carried out and requires painstaking time to sort properly and to go through the plastics. This is why the resin identification coding system was implemented in 1988 to help better identify plastics. The number in the middle has no real significance and is just there to help name the plastic the item is made from. This system has greatly improved the way plastics are handled and recycled leading to greater efficiency and better consistency when sorting through plastic resins.Save The Planet, Recycle Your Plastic Bottles

There are, however, some plastics that cannot be recycled. These plastics are called thermosets, which are plastics that cannot return to their original form. The best example of this type of plastic is Phenolic which was the first commercially available plastic back in 1907, and was originally called Bakelite. It is primarily used for electrical and mechanical purposes. Unlike thermoplastics which can be formed and returned to their original shape, thermosets cannot due to their chemical makeup and they frequently have additives or fillers. Thermosets form above the melting temperature so when they are heated, the decomposition temperature is reached before the melt point.

Many of these thermoset materials replace other, much more expensive materials, and generally out last the former material by as much as 20 times. In practice, these material reduce the usage of natural resources and the ‘carbon footprint’ used to produce the items. One such material is the Nylon bushings used in large ships. The Nylon replaces a large Bronze bushing that used to be replaced once a year, and required the ship be put into dry dock to remove and replace the bushing. The new Nylon bushings out perform the bronze, and will last over 12 times longer. Dramatic savings in materials, casting new bronze bushing and the loss of sailing time of these ships.

Thanks to recycling improvements in the last 25 years, recycling has become much more efficient. Because of these programs better care has been taken to insure that plastic is not littered or discarded lightly, and that the programs created are easily accessible so people can take better care of their trash and better care of the earth. Plastics manufacturer commonly work to reuse and recycle materials during production. Many materials are available as ‘reprocessed’ or ‘commercial grade’ materials, meaning they contain a percentage of material that has been processed before. The first time a plastic resin is sent through the manufacturing process, that resin is referred to as ‘virgin resin’. Any further processing, the material must be referred to as reprocessed.

Want more information on the recycling of plastics, click here for recycling information. You may also contact us if you have a specific material question at: 866-832-9315, we are happy to assist.

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Noryl versus PPO

What is the difference between Noryl and PPO (or Modified PPO)?Black Noryl PPO water nozzle

Noryl® is a trade name for Sabic Plastics (formerly GE Plastics) for their Modified PPO (Modified PolyPhenyleneOxide). Sabic is the world leader in engineering and mechanical plastic resins.

This resin is a remarkably versatile material. PPO exhibits unusually low moisture absorption and great machinability. Noryl® is an excellent choice for water filtration and fluid handling parts. Noryl has excellent impact resistance, long term dimensional stability and is light weight. Noryl® has exceptional electrical properties (properties boosted by lack of water absorption). It can be thermoformed and machined to tight tolerances. It carries a UL flammability rating between UL 94-HB to UL 94 V-1. The primary specification covering PPO (Noryl®) is ASTM-D-4349.

Sabic Noryl is available in two standard unfilled varieties, EN-185 and EN-265. The number indicates the heat deflection temperature of the material. This material is easy to machine, holds tolerances well, and is great for water immersion applications. A complete data sheet is found here.Noryl EN-265 machined part

We stock this material in both sheet and rod. The standard natural color for Noryl is opaque Black and is stocked as the EN-265 grade of resin. Noryl® is also available as a glass filled material which enhances both the mechanical and thermal properties of the resin. Chemical attack from water, most salt solutions, acids and bases is also minimal with Noryl®.

Materials with similar physical properties are ABS, Acetal – Delrin, PET and PBT (Polyester) and Nylon.

Contact us for more details on the range of PPO – Noryl materials. Call us at 866-832-9315 or email us.

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How to choose your PTFE Sheet Suppliers

Choosing a PTFE – TFE Sheet Supplier can be difficult, confusing and potentially costly. There are many industries and applications where PTFE – TFE Sheet materials are used, and many providers that want to fill this need. However, it can be difficult to find a supplier that meets all of your business’ PTFE – TFE Sheet needs. To help you choose the supplier that is right for your business, we have compiled this list of 7 things you must know when picking PTFE – TFE Sheet Suppliers.

1. PTFE – TFE is available in many shapes and sizesVirgin PTFE Gasket 7 Things You Must Know When Choosing Your PTFE Sheet Suppliers

Polytetraflouroethylene (PTFE) can be ordered in many different forms, including rods, sheets, blocks, strips, slabs and tubes. As your business grows, you may need access to one or more additional configurations – or perhaps your business is already using multiple configurations. Choose the proper PTFE Sheet Supplier that can meet not only your current needs, but future needs as well. You can view further information about the shapes and sizes as well as and resin properties on our PTFE – TFE information page here.

2. There are a variety of PTFE – TFE Sheet thicknesses to choose from

It is important to have access to multiple sheet thicknesses, and convenient and cost effective to access them all from one Sheet Supplier. That’s why Industrial Plastic Supply offers sheet thicknesses ranging from .005″ to 3.0″, and rod diameters from .125″ to 6.0″. Film is also available. As with in stock availability, your PTFE Sheet Supplier should also be able to meet all of your Sheet thickness needs. Standard sheet sizes are 48” X 48”, and films generally are stocked in 12” wide rolls.

3. Not all PTFE materials are created equal

Some PTFE – TFE Sheet Suppliers order materials from ‘who ever they can get it from’ on an as-needed basis. This brings the question of quality and consistency to mind. There are many manufacturers, including some from China and Russia with questionable quality ratings and machinability. Before committing to a quality PTFE Sheet Supplier, make sure that the supplier is using a reputable manufacturer, and that the quality of material meets your needs. Getting stuck with a poor quality, difficult or impossible to machine block of PTFE can be time consuming and costly.

4. Minimum material order amounts matter

Large Sheet Suppliers and other plastic suppliers often have high minimum order requirements. This makes sense for high volume applications, but for small businesses, or any business in the clutch, it may be necessary to request a smaller total order. Rather than work with multiple PTFE or Plastic Sheet Suppliers based on order size, choose a supplier that can service any order whether large or small. Industrial Plastic Supply has a low minimum material order of $20.

5. Many suppliers do not keep inventory in stockPTFE sheet and PTFE rods 7 Things You Must Know When Choosing Your PTFE Sheet Suppliers

Just like Grandpa used to say, “You can’t sell from an empty cart”.

Buying your materials from a plastic ‘broker’, means you may have to wait while they try to find the materials to fulfill your requirements. It may also mean that you get the quality of material that they can find quickly. While this may be acceptable for materials that are rarely ordered, your PTFE Sheet Supplier should have your business’ most commonly used materials on hand. This avoids delays and ensures the quickest possible turnaround times on your important orders, and materials from stock means a quality product for your parts.

6. Industry knowledge is critical

You want a Sheet Supplier that not only can deliver your materials, but answer any questions you may have, including the tough ones – whenever they arise. Finding a quality PTFE Sheet Supplier with expert knowledge and great availability will save your business headaches in the long run. Industrial Plastic Supply’s highly trained staff has an average of nineteen and a half years of experience in the plastic industry, and are only a phone call or e-mail away.

7. Choose a supplier with focus

A focus on industrial grade plastic supplies ensures that a supplier is specialized and knowledgeable enough to be your PTFE Sheet Supplier. By focusing on plastics, such a supplier will be dedicated to your mechanical plastic Sheets, Rods, Tube and other shape needs, no matter the application, and no matter how your business changes. Your important orders will be processed timely and efficiently. Since 1975, Industrial Plastic Supply has focused on the mechanical and machinable plastics market, and nothing else. For more information on PTFE Sheets or other plastic materials, contact Industrial Plastic Supply, 866-832-9315. We will work to earn your business. Also, compare PTFE with UHMW or read our post UHMW Sheet versus PTFE Sheets; or read our post How to use PTFE Rod for ideas.

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Topic: PTFE Sheet Suppliers


FDA – NSF Approved Cutting Boards

HDPE and UHMW Polyethylene Sheets

Next time you are cutting vegetables on your cutting board, the material most likely to be used is Polyethylene. Because it is stain, moisture and odor resistant, Polyethylene is a perfect choice. Other cutting boards made out of wood are more susceptible to bacteria and odors because they lack the properties that Polyethylene sheets offer, such as its chemical resistance and FDA approval for food Colored HDPE Cutting Boards NSF approvedcontact. Polyethylene is a very durable and lightweight material that comes in many forms and is a great for a wide variety of applications.

NSF Approved Cutting Boards

The HDPE is available in .500″ thick in several FDA / NSF approved colors, and is great for use in kitchens where cross contamination is a problem. 

The Ultimate Cutting Board

Polyethylene has many names. The most common are HDPE, LDPE, and UHMW. The difference has to with the molecular weight and branching which is when a monomer or atom is replaced by a longer chain of polymers (a long repeating chain of atoms). High Density is commonly used for milk jugs and food containers. Low Density is commonly used for bottles and plastic bags. UHMW, which has higher molecular weight (2-6 million) allows for an even transfer over the length of material which makes it stronger and able to be used for bearing applications due to its great wear resistance. Commonly used in the food and dairy industry, UHMW is a great replacement for other materials and solution to many problems. All of these polymers are derived from the same family but all have certain properties that make them a little different. HDPE provides great chemical resistance, with high impact strength and great energy absorption. LDPE has most of the same properties as High Density but is not as dense at 9.15, opposed to HDPE which is 9.34. It also has a lower tensile strength and easier formability.

UHMW is a strong material that has great durability and low co-efficient making it an ideal for sliding FDA and NSF approved UHMW machined sproketapplications. Polyethylene offers a wide range of material choices and properties and has great durability that can be suitable for a number of applications. From the food industry to automotive, the kitchen or the warehouse, whatever your Polyethylene needs are; High Density, Low Density or UHMW, Polyethylene is a great choice.

Typical Resin Properties:

General Property ASTM Test Typical Value HDPE Typical Value LDPE Typical Value UHMW
Specific Gravity D792 .941 – .965 .91 – .925 .93 – .94
Tensile Strength Yield D638 3,800 – 5,500 1,400 – 2,000 6,800
Izod Impact – Notched D256 2.0 – 3.5 >16 No Break
Vicat Softening Temp D1525 257ºF 219ºF 260
Hardness – Rockwell D785 D60 -70 D42 – 50 R64
Continuous Use Temp -100 – 180ºF 174ºF 180ºF
Deflection Temp @ 66 psi D648 171   124 174
Co. Thermal Expansion D696 7X10-5 4.6 -5.5X10-5 11.0X10-5

Please contact us for more information on FDA and NSF approved plastic materials. Email us here, or call us at: 866-832-9315

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Topic: HDPE Cutting Boards – NSF Approved

Nylon Tube and Tubing can be made from Nylon 6 or 6/6

Nylon is one of the most popular and widely used plastic materials. From the carpet in your home to the yellow Nylon rope you have in your garage, Nylon is a tough and very wear resistant material. This self lubricating mechanical plastic material is very stiff and extremely durable. This material can be machined easily, and is a key industrial plastic resin.

Nylon 6 and Nylon 6/6 Tubing

While Nylon is a common plastic material, in the extrusion and cast grades, it is not a normal stock item for many factories. Nylon can be produced in a huge range of sizes. The cast process enables the range of sizes of a Cast Nylon Tube (Type 6) to be almost unlimited. The extrusion process is a bit more restrictive, which can produce very small sizes to larger sizes of Extruded Nylon Type 6/6 Tubing up to about 2.0″ OD. The properties of these materials are similar, and are listed here. Also, in the case of the Cast Type 6 Nylon Tube, many additives can be mixed into the casting Nylon MD - Polyamide Plastic Material On Metal - Steel Coremixture to increase many critical properties. Examples of these additives can yield: Glass Filled Nylon Tube, FDA Approved Oil Filled Cast Nylon Tubing, Cast Nylon MD Tube (molybdenum disulphide), Solid Lubricant Filled Cast Nylon Tube, and a few additional variations. These same filled items are also available in Cast Nylon Rod, Cast Nylon Sheets and Cast Nylon Plates (all made from the same Cast Nylon Type 6 resin). This casting process allows for a wide range of sizes and configurations, from round rod, cast sheet, tubular bar to near net shapes and covers on metal rollers and gears.

Why use Tubular Nylon (Nylon Tubular Bar)

There are numerous reasons to use a Nylon Tubular shaped material. 1. Vast range of sizes to fit most requirements 2. Large reduction of waste due to near net shape 3. Great reduction of machining time due to matching size to finished needs12" OD Large Cast Nylon Tube 4. Lower cost due to reduced material and reduced machining time

The difference between Nylon 6 Tubing and Nylon 6/6 Tube

The main differences are the base resin. The Nylon 6 tubing is a cast resin, and the Nylon 6/6 tube is an extrusion grade resin. Both materials are still Nylon, just a different grade of resin. The properties are also very similar, look here for specific Nylon resin properties. The other difference is that the Cast Type 6 Nylon is normally in larger sizes. This is because the cast version is poured as a liquid into molds or rigid tooling, and is done one at a time. This process, while it makes a very high quality part, is a more expensive manufacturing method, and is not cost effective in small or thin cross sections. The extrusion grade of Nylon, the Type 6/6 Nylon is heat processed in large batches. This process requires set up and large runs, and is very cost effective in these large production runs. In addition, the cross sections for the heat processed Nylon 6/6 can not be excessively large. The extruded Nylon 6/6 is therefor done sizes up to about 3″, as larger pieces are more expensive and require extra stress relieving to prevent warping.

Cast Nylon Versatility

The Cast Nylon manufacturing in the USA is very advanced. The production facilities can produce amazing and diverse sizes and shapes in the grades listed above. One of the unique versions of Cast Nylon is in the Glass FilledLarge Cast Nylon Sheaves Nylon Tube, Glass Filled Nylon Rod and Glass Filled Nylon Sheet range. The percentage of glass fill can be custom blended to meet your specific needs, and can also contain additional fillers like MD, Oil or pigments. Many grades of Nylon are also available for very specific applications, like: bearings, sheaves, pulleys, wear plates, food processing applications, FDA approved grades, color matched for identification and many more. Other plastic materials used in these same applications include: Acetal / Delrin, PET (Polyester), PTFE and more. Contact us today for additional information on this or any other plastic sheet, rod or tube material. E-mail us here, or call us toll free at 866-832-9315, or visit our main web page at: iPlasticSupply.com

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Innovative Plastics Manufacturer

Produces Innovative Sheet and Rod Materials

Gehr Plastics has been a major global manufacturer in the plastic sheet and rod industry since 1932. During this period, Gehr has become a leader in a variety of product lines, and also become known for very large sizes in both sheet and rod. Currently Gehr can produce Acetal rod up to 20″ in diameter and sheets up to 8″ thick. Gehr Plastics PVC, ABS, POM-C, Acetal and Ultem Rods  Some of the many plastic materials the Gehr produces:

Winner of the 2008 Bioplastics Award

Bio Based EcoGehr Plastic Rod Being innovative also means looking forward. Gehr was selected as the Bioplastics manufacturer of the year in 2008, partly for the new line of plastic materials which have a bio base. These materials have a variety of bio based forms, including: a PLA base, Cellulose based, Polyamide and Wood – Plastic Composite (WPC). One such material is ECOGEHR PLA-L which is a blend of polylactic (polylactic acid), some lignine, fatty acid and wax. This biopolymer is new to our industry and can be used in temperatures ranging from -22 °F to +140 °F. This complete line of materials is one of the only available in the plastic industry to be comprised of many renewable raw materials. Gehr leads the way in this exceptional and innovative product line.

ClearGehr Polyamide Rod

This brand new product is a Clear Polyamide rod. The outside surface is as extruded, and can be polished. This enables the production of a relatively clear sight glass quality material with most of the high end properties of Polyamide – Nylon material. We have supplied this material for small machined parts where neither Polycarbonate nor Acrylic would work well. Because of the natural inherit chemical resistance of Polyamide, this high end ClearGehr rod can out perform all normal transparent plastics. Give us a call to see if this new innovative product will work in your difficult application.

FDA Approved Wear Grade Acetal

Have you been looking for an extended wear Acetal material (like the PTFE filled Acetals – Delrin AF), but need it to be FDA approved? Then perhaps you should consider WearGehr. This propriatary filled Acetal material has excellent wear resistance, and retains the FDA approval of the base Acetal, unlike the PTFE filled Acetals which are not FDA approved. It is made in a blue color for easy identification, also it remains very machinable. Contact us for more information on this excellent high tech material. Call us at 866-832-9315 or send us a note here.

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Delrin Homopolymer versus Copolymer Acetal

Have you noticed the little plastic gears in your watch, the working parts in a garden hose nozzle, audio and video cassette moving parts, food slide components, timing screws and pumps parts, or perhaps even acoustic guitar picks? If you have, then you have seen perhaps the most versatile plastic known as Acetal (polyoxymethylene or POM). It is an extremely durable and strong plastic material, so it is no surprise to see it being used for so many different things. Used as a regular replacement for many aluminum or metal parts, or the similar plastic materials, like Polyamide Nylon or Rigid Polyester. It is the next step up from HDPE, a common plastic used in food processing. Because of the uniform molecular structure of Acetal, it can be used for different applications that might require a plastic material to be more rigid, have good mechanical properties and have a low coefficient of friction.Machining Copolymer Acetal or Delrin Homopolymer Acetal Rod

The battle between Delrin and Acetal

Both Delrin and Acetal materials are thermoplastic. What this means a material can be softened by being heated and when cooled becomes hard again, and will retain the new shape. Because of this characteristic it is able to be molded in to many different types of objects, like the few listed above. While some thermoplastics are ‘formable’, Acetal is definitely not to reshape with heat after it is made into a sheet or rod. A crystalline, rather than amorphous type resin is used to make acetal. Because of the uniform molecular structure of Acetal, it can be used for different applications that would require a plastic material to be more rigid, have excellent mechanical properties and have a low coefficient of friction. Both of these resins are produced in Natural (White) and Black, also there are some colors are available on special order; there is also the Delrin AF (a PTFE filled Delrin) is a mid to dark brown color.

There are two basic grades of Acetal

You need to know some of the differences, Acetal versus Delrin. There are two main types of Acetal; one is a copolymer and the other a homopolymer. Ticona is one manufacture that makes a widely known copolymer called Celcon, BASF produces a high quality copolymer, H2320. Likewise DuPont makes Delrin, a popular brand name and the most commonly used Homopolymer. Standard mill shapes include: Acetal Sheet, round rods, flat sheets and some tube and profiles are also produced.
They may be close, but not the exactly

Yes, the copolymer and homopolymer acetal are very similar and they look the same, they do have some large differences in properties and this makes them unique in their own way. For example the copolymer will perform better than the homopolymer in these areas; thermal, impact, wear and chemical resistance. As you investigate the copolymer characteristics, you will discover that it has a lower water absorption rate. You may find this to be important if you plan on using with moist functions such as faucets, impellers, pump parts, valve and valves stems than the homopolymer acetal will. Now, when you review the homopolymer, which has a higher crystallinity, this will increase some properties and make it stronger, with improved mechanical strength and creep resistance, than its brother, the copolymer. Chemical resistance is one of the areas Acetal materials sometimes have a weakness, specifically oxidizing agents and strong acids. Other than these types of chemicals, Acetal is pretty much resistant to a wide range of solvents and commonly used chemicals.

Delrin Versus Acetal

One visual difference, and possibly a significant performance difference, between the copolymer and homopolymer is center line porosity. The homopolymer (Delrin) resin is known to be susceptible to having center line porosity, a section in the center of a rodt, it will be seen as a small circle found at the center. As for slab or sheet, it will appear as a white stripe down the center or middle (of the thickness) of the extruded or compression molded sheet material. This porosity is caused by the gasses trying to escape during the cooling processes. If a large rod is to have the middle or center machined out, then Delrin is an excellent choice. Copolymer Acetal does not have this ‘soft center’ or porosity.
Homopolymer Delrin and Copolymer Acetal are easy to machine

Both of these resins can be excellent choices for machining and mechanical type applications. Tight tolerances may be maintained during the cutting and machining process. The materials are considered to be self lubricating, and make very good dry slide wear strips. Both of these resins are FDA and 3A (Dairy) compliant.

You may wish to consider Acetal, either Delrin Homopolymer or Copolymer Acetal for your next engineering plastic applications. Contact us via Email for additional assistance, or call us at 866-832-9315

Topic: Delrin Versus Acetal in Sheet and Rod

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Unitrex Lf20 – PTFE Filled PEEK

A newly released form of Filled PEEK is now available. This PEEK is filled with PTFE and is called Unitrex Lf20, and it is filled with 20% PTFE. This new grade of PTFE Filled PEEK plastic is produced by Nytef Plastics. It is an extruded thermoplastic that comes in both rod and sheet form. This grade has significantly improved properties over the standard unfilled grades of PEEK. The PTFE filler provides excellent wear properties and has a very low co-efficient of friction, which makes this a great material for sliding and wear applications, and is made to last for long periods of abuse. Unitrex Lf20 has great machinability and dimensionally stability. It has a wide range of uses in such fields as medical, semi-conductor, and aerospace seals, where standard PEEK is too rigid. These properties enable this material to replace Polyimide (Vespel®) and PCTFE (formerly Kel-F) in many applications of high chemical resistance and the ductility for use in seals. This Filled PEEK works extremely well in Medical, Semi-Conductor and Aerospace Seal applications. Nytef Plastics Unitrex Lf20 Manufacturer

PTFE Filled PEEK vs. PTFE Filled Acetal – Delrin

 

Comparable to Lf13 which is 13% PTFE filled Delrin (Delrin AF), which is also good for most of the same types of applications but cannot withstand the high temperatures than that of Unitrex Lf20. The PTFE Filled PEEK has a melting point of 650 degrees F while the PTFE Filled Delrin – Unital Lf13 has a melt point of 347 degrees F, making both materials high temperature plastics.

Because the Nytef Unitrex Lf20 is filled with PTFE (which has the lowest co-efficient of friction of any plastic), it is ideal for sliding and wear applications. It also has a kinetic and static friction resistance of 0.1 which makes it the perfect choice for jobs were heat from friction should not be generated and part longevity is critical. Unitrex Lf20 offers superior properties to many other plastics, such as high heat and chemical resistance but also great friction resistance along with improved properties to make it a great plastic for a wide spectrum of uses.

Why Change from Vespel SP-1 or PCTFE to Unitrex Lf20?

While this new PTFE Filled PEEK will not replace the Vespel SP-1 and PCTFE in all applications, it certainly will in many applications (see table for comparison). The main reason to make a change is, drum roll please, COST. The Unitrex Lf20 is up to 30% less expensive that the other materials. With similar and comparable properties, consider making the change.

Unitrex Lf20 also exhibits a far superior chemical resistance to that of its Delrin counterpart due to PEEK having a far better range of chemical resistance to aqueous and organic environments as well as acids and alkalines. Delrin tends to degrade when exposed to such chemicals like sulfuric acid and chlorine while PEEK only tends to be attacked by halogens and hydrocarbons such as in crude oils. For additional properties and to compare the Unitrex LF-20 to Dupont Vespel SP-1 and PCTFE see the table below. Here is a copy of the full data sheet on Nytef Unitrex Lf20.

 

Standard Properties Table

Properties TestMethod Unit UnitrexLF20 Nominal Value PCTFE(Kel-f) Nominal Value VespelSP-1 Nominal Value
Specific Gravity ASTM-D-792 1.42 2.1 – 2.14 1.43
Tensile Strength ASTM-D-638 psi 11,500 4,800 – 5,300 12,500
Tensile Modulus ASTM-D-638 psi 460,000 207,000
Flexural Modulus ASTM-D-790 psi 500,000 180,000 450,000
Rockwell Hardness ASTM-D-785 84-D 90-D 45 – 60 E
Melting Point DSC degress F 650 410 – 415 680+
Flammability UL 94 @ 3.0mm V-0 V-0 V-0
Kinetic Coef. of Friction ASTM-D-1894 0.1
Static Coef. of Friction ASTM-D-1894 0.1

For additional details on these and other materials, please contact us here or call us at 866-832-9315

Unitrex and Unital are registered trademarks of Nytef Plastics, Ltd.
Nytef is a US manufacturer of plastic sheet and rod, is based in Bensalem, PA
Delrin and Vespel are registered trademarks of E.I. Dupont

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Acetal – Delrin Sheet vs. ABS Sheets and Rods

Acetal-Delrin® (Delrin® is a trade name for Dupont’s Acetal Homopolymer) and ABS (Acrylonitrile-Butadiene-Stryene) have some similar properties but are really very different materials. They similarities are: high impact strength, ease of machining with standard cutting tools and good mechanical properties. They are also both FDA compliant and are both good substitutes for brass. They also have great water absorption resistance and good electrical properties. Both materials are good for some of the same applications but certainly not all. Listed below are some of the major differences.Natural ABS Rod, Rods, Sheets and Sheet

ABS Sheet and Rod Information

 

  • ABS comes as Natural (straw) and Black color in Plate, Slab, Sheets and Rods, and thin sheet (.040″ – .250″) it is available as White or Black with a textured surface one side. It can be cut from 48″ X 96″ sheets into strip, panels or pieces.
  • ABS is formable. ABS is a great thermo-formable material while Acetal is not. Acetal is used more for machined parts such as gears and screws. ABS is great for molding and shaping parts from vacuum to heat forming. Excellent for model building and prototype projects.
  • ABS is easily bondable (similar to PVC). ABS can be bonded or welded to itself. Because Acetal is self lubricating, it is not possible for anything to stick to it unless etching is done – therefor it is not bondable.
  • ABS is a great material for painting and silk screening. While Acetal can not be painted or silk screened unless it has undergone Corona Treating (a flame surface treatment), but if treated will nice paint or screened surface.
  • ABS has better chemical resistance than Acetals or Delrin®. Both are attacked by acids like sulfuric, but ABS has a wider range of resistance to chemicals like aqueous acids, alkaline and alcohol. Acetal will degrade when exposed to such chemicals as chlorine and alkalines.
  • Specialty grades of ABS are available, including: Glass Filled, Static Dissapating, and Fire Retardant Grades (like Royalite – R59)Machined Black ABS Rod Part

ABS Typical Properties Table

General Property ASTM

TestTypical ValueR59 Typical ValueSpecific Gravity D7921.041.18 – 1.25Tensile Strength YieldD6386,5005,000Tensile ModulusD638320290,000Izod Impact – NotchedD2567.07.8Hardness – RockwellD785R105R93Deflection Temp @ 264psiD648192174Deflection Temp @ 66 psiD648208195Co. Thermal ExpansionD6965.3X10-54.6 -5.5X10-5

 

Acetal-Delrin® Sheet and Rod Information

  • Acetal is the better machining plastic, considered the best machining plastic material. Because of its durability and wear resistance, Acetal is an excellent choice for producing a wide variety of parts that require high wear resistance over a wide period of time. When machining to tight and specific tolerances, Acetal is ideal.
  • Acetal has low co-efficient of friction. Due to its self lubricating properties, it is a great material for sliding and wear applications. This material provides years of maintenance free bushings and bearings.Natural Acetal Machined Gears
  • Acetal – Delrin sheet is produced from .062″ – over 6″ thick and sheet sizes of up to 48″ X 120″ as standard. The standard color for Acetal and Delrin is Natural (a deep milky white) and Black. Some colors are available as Medical Grade, and can be obtained in limited sizes. These sheet are available cut to: slabs, blocks, plates, slabs and blocks.
  • Delrin – Acetal (Polyoxymethylene) can be both a homo and a co-polymer. The Dupont brand name is a homo-polymer which is a repeating chain of one atom while the generic Acetal is a co-polymer which is two atoms forming a repeating chain. ABS is only a co-polymer.

Acetal – Delrin Properties Table

General Property ASTM Test Typical Value Unfilled Delrin® Homo-Polymer Typical Value Unfilled Co-Polymer
Specific Gravity D792 1.42 1.40
Tensile Strength Yield D638 9,600 – 11,000 9,000 – 10,200
Tensile Modulus D638 450,000 400,000
Izod Impact – Notched D256 1.2 1.0
Hardness – Rockwell D785 M94 M90
Deflection Temp @ 264psi D648 257 220
Deflection Temp @ 66 psi D648 347 335
Water Absorption @ 24 hrs % 0.24 0.25
Co. Thermal Expansion D696 6.83X10-5 5.4X10-5

ABS and Acetal – Similar, but very different materials

Both of these materials possess excellent qualities and have a wide range of different uses. Acetal is great for machining, while ABS is great for forming and bonding. They both can be used for machined parts and are great choices for food contact and electrical applications. These two materials are both strong and durable plastics, but one might be better than the other for a specific job. When picking the right plastic, it is important to compare plastics and their specific properties to make sure the material won’t fail and that your job will be successful.

Contact us for additional information, call us at 866-832-9315 or contact us here. Consider Industrial Plastic Supply for all your plastic needs, we want to be your go-to plastic supplier.

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We are in Anaheim, California – SoCalAnaheim, Orange County, Big-A, Los Angeles Angels of Anaheim

A frequent question is ‘Where are you located’, and we are happy to share our address.While we service the entire United States, our shipping warehouse is regional.

We are in Anaheim, California, and have been since 1975. Here is our street address:

  • Industrial Plastic Supply, Inc.
  • 2240 Dupont Dr.
  • Anaheim, CA 92806
  • 866-832-9315 or 714-978-3520
  • Our Fax number is: 714-978-2812

Thinking Nationally, Serving Locally

Providing local industrial clients high quality materials for over 37 years, we find that having a warehouse full of materials is a benefit to you, our client. The inventory is here, and we welcome you to come by for a visit. We service the entire USA on a daily basis, however, we still are a local company and can service your local needs today. You requested more stock of the items you need, and we have done our best to have the most popular materials in stock, with more on the way.

When selecting our location, we considered many factors, including: freeway access, central location, easy to find, etc. We picked Our real building. Industrial Plastic Supply, Anaheim, CA - Orange CountyAnaheim because it is in the center of Orange County. We are centrally located between Los Angeles County, Riverside County, San Bernardino and San Diego Counties. We have clients pick up here from Ventura County and even Santa Barbara Counties! We really are easy to find, right across the street from the ‘Big A’ – Anaheim Stadium where the Los Angeles Angels of Anaheim play ball.

Next time you are traveling in Orange County, we invite you to stop by and see the huge inventory of industrial, mechanical and engineering plastic sheet, plastic rod and tube we have here for you.

Questions? Feel free to Ask A Plasticologist here, we really do want to assist.

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