Gehr Plastics Announces Huge 24″ Diameter Acetal Rod

Gehr Plastics is an industry leader in large high performance plastic materials. They announced at this years IAPD Conference in San Diego, the new production of 24″ diameter (600mm) Natural Copolymer Acetal Rod.

Gehr Plastics 24

24″ Diameter Is Worlds Largest Acetal Rod

Gehr Plastics has been an innovator in the large cross section plastics market. This new 24″ diameter (600mm) is the Worlds Largest Copolymer Acetal Rod. They also produce a Copolymer Acetal Sheet that is 8.0″ thick, also the Worlds Largest.

Being an industry leader is more than making the largest material, it is also about making the best quality material. Gehr Plastics is ISO 9001 and ISO 14001 approved and certified, guaranteeing a consistently high quality product. The product line that Gehr Plastics produces is also quite large. The materials include: ABS, Acetal (POM-C and POM-H), HDPE, Kynar, Noryl, Nylon, PEEK, PEI, Polypropylene, Polysulfone, PPO, PVC (Type 1, Type 2 and CPVC), PVDF and Ultem materials. All of these materials are available in a wide range of sizes, and yes, some of the largest.

Gehr Plastics Long History

Gehr Plastics has been leading the industry in innovation since 1932, and is now in the third generation of family owned and operation. From the wide range of materials to the extremes in size range, this is cutting edge performance from a family run company. They also released a web-app for picking plastic materials, Gehr Plastic Selection Tool, and it is also available for mobile devices. This comparison tool compares not only plastics, but metals as well, for a great look at the best physical properties for an application.

While quality and size are keystones to excellence, Gehr Plastics is also interested in materials that the rest of the industry has not considered. Over the last several years, Gehr has produced some PLA materials (made from plants) and even a Clear Nylon Rod for higher temperature sight-glass applications. These are just a few of the cutting edge areas that Gehr Plastics is leading in this industry.

Industrial Plastics is Master Distributor

Gehr Plastics materials are sold through a tight network of Master Distributors throughout the United States. Industrial Plastic Supply, Inc. of Anaheim, CA is proud to be one of the top selected suppliers of these innovative materials. Contact us for any of these high quality and wide size range materials, call us @ 866-832-9315 or send us a note here.

Google Author – Hayden Hess

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Best Tools To Assist In Your Plastic Sheet Search

Use the best available tools to narrow down the best plastic sheet material for your application.

What are the best methods to pick the proper plastic sheet material?
Use the tools that the professionals use to find the best plastic material for your application.

Where To Begin

The process of picking the proper plastic material starts with determining the ‘must have’ physical properties needed for your application. Designing a part with the minimum performance factors in mind will help to eliminate an overly
expensive part.

Critical factors to consider are:

  • Temperature requirements (short term and long term)
  • Chemical or Environmental Requirements
  • UV resistance (Will it be in direct sunlight)
  • Color or Transparency
  • Strengths (Impact and Compression)
  • Compliance Issues (Certification for FDA, NSF, Dairy, etc.)

Review The Plastic Property Comparison Guide

The first tool suggested is a chart produced by the IAPD (International Association of Plastic Distribution – http://iapd.org/) linked in picture below, and listed on this chart are the most common plastic sheet and plastic rod materials that are commonly available. In addition, the chart compares the physical properties of these common plastic materials. Click on picture to access chart.

IAPD Plastic Selection Rectangle Chart
Included in this chart is a relative cost comparison, which will assist in limiting the materials to proper plastics for a application without over-designing and using an expensive ‘over kill’ material. Some common plastic sheet materials can be very expensive. Materials like PEEK (Polyetheretherketone) can be in the $100 per pound range or more.

Start Search With Temperature Resistance

After looking over the IAPD Physical Properties Chart, now it is time to evaluate specifics for your application. The critical factors listed above are ranked by most important to least important. If your part needs to handle a continuous temperature of 300 degrees F, this is a critical physical property. Picking a material that softens at 250 degrees is a
recipe for disaster. Pick a material that can handle the temperature first.

Will Part Have Chemical Exposure

Next, look at environmental requirements. Parts exposed to chemicals are important to research. Find the chemical make up and the concentration of the chemical to insure the material you pick can handle this solution. Many plastics have excellent chemical resistance as evidenced by evaluating the container the chemicals are stored in already. A common plastic that is chemical resistant is Polypropylene, the same material used for automotive batteries. While Polypropylene and HDPE sheets are excellent in chemical resistance, their temperature range is quite limited. Also, these two plastics can not be easily bonded or glued, and would require heat welding for assembly.

Does Your Part Live In The Sun

Most plastics do not handle long exposure to direct sunlight without an additional UV additive. The one exception is Acrylic, which is the most UV resistant plastic sheet available. Some plastics handle UV well if they have a carbon black additive, or a extra UV package added at time of production.

How Critical Is The Color

The most common colors in many plastic sheets are Natural (white to tan) and Black. While other colors are available with a special run, this may require a large minimum order. Some plastics, like HDPE are available in many colors and textures for use in marine, playground and food processing applications. In many plastic applications, a machined part is being made, and the color is the least important factor. If it is an internal part of a machine, no one really cares about the color of the part. Some clients look for materials in a specific color to help ‘brand’ their parts for easy replacement and identification.

How Much Stress Will The Part See

Strength is a wide range of physical properties covering many stresses a part may be exposed to. From impact to compression, expansion to tensile strength, all of these can be critical in designing a plastic part. There are other factors in the ‘Strength’ realm, like Notched Izod and Stress Can Cause Your Plastic Part to Bow, Twist and Crackwater absorption. If your part will be exposed to crushing pressure, pulling apart force or impact, these are critical things to consider prior to picking your plastic part.

PTFE is a soft and slippery plastic, but will ‘cold flow’ under high pressure, and High Pressure Laminates like G-10 FR 4 sheet can withstand some of the highest pressures. The Notched Izod tests for materials that break easily if a scored mark has been made in the surface. Acrylics break very easily if scored, but UHMW will not break at all under the same test.

What Agency Approval May Be Required

In many applications a part may require approval or testing to meet a third party certification. One such common application is for materials in food processing applications. Common requests included UL ratings, Fire Ratings, Military specifications and many more. Food contact is a popular request, coving material that is either FDA (Food and Drug Administration) or NSF (National UL Ratings for Plastic MaterialsSanitation Foundation) approved. These agencies insure that materials are rigorously tested and comply with their requirements for safety. Some common materials used in food processing that meet the FDA certification are Delrin – Acetal, HDPE, UHMW and Nylon, plus many others.
Once these steps have been completed, several materials should present themselves as meeting your criteria and physical property requirement. Unfortunately there is no one perfect plastic that works in all applications. However, for almost every application, there is a material that will work, and work better than most other substrates.

Cool Online Tool

There is also an additional tool that can be used to help identify some of these properties quickly, the Gehr Plastic Selector online application.

If you are still in need of assistance in identifying an appropriate plastic material, contact an experienced Plasticologist at Industrial Plastic Supply, Inc. – call 866-832-9315

Also see the article, New Methods To Pick Proper Plastic Sheet Materials, for additional information on this subject.

Google+ Author – Hayden Hess
Topic: Best Tools to Assist In Your Plastic Sheet Search

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