Plastic Mentor – Focusing on Plastic Sheet Material Education

We have been working very hard over the last few months to bring you new, informative, and hopefully interesting articles on plastics.  However, even though we focused on writing articles pertaining to plastic—we have also covered other topics as well, like protecting yourselves from hackers, B2B Live Online Chats, Domain Names Available, The Next Innovation in Sound Technology and even an online prank! Plastic Mentor Focuses on Plastic Sheet and Plastic Rod Education Plastic Mentor Focuses on Plastic Sheet and Plastic Rod Education Polymer Industries Buys Nytef Plastics

The purpose of the Plastic Mentor blog is to educate all those people that are interested and willing to learn something new. Curious ones that don’t stereotype plastic under one category and are intrigued to know about what they are buying.

Why Choose Plastic Sheet?

The truth about plastic in general is that it is versatile and efficient. It can cut the cost of production and in most cases produces less green house emissions than paper, metal or glass.  

Choosing the proper plastics can be accomplished by narrowing down some basic properties. For example, is the application going to be used for indoor or outdoor use?  What temperature will this plastic be required to resist? Is the plastic clear or colored? Are you looking for sheet, slab, rod or tubing? What are the dimensions of your part? And finally, how many pieces are you looking to get?  These might seem like tedious questions, but they are essential to get you the best plastic for your application.

Our Newest Addition Asks A Great Question

When a recent new employee started working at Industrial Plastic Supply, they asked the General Manager, “Which material is the best plastic?” 

At first the GM just chuckled politely, but then graciously gave a good analogy.  He said, “Asking what the best plastic out there is like asking a car salesman what is the best car on the market?  It certainly depends…a fast 2 seat sports car is probably not the right transportation for someone looking for a new family vehicle.”

This is very insightful, and most people never think about Plastic Mentor Focuses on Plastic Sheet and Plastic Rod Education Plastic Mentor Focuses on Plastic Sheet and Plastic Rod Education fast sports carplastic in this way!

Plastic Sheet and Rod Questions Welcomed…

When you come to Industrial Plastic Supply, please ask questions…it helps us just as it helps you to get you. Please contact us for help in identifying your next plastic material.

Google+ – Hayden Hess

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Topic: Choosing the right plastic sheet materials, Plastic Mentor can help

PTFE Sheet versus UHMW SheetsUHMW sheet compared with PTFE sheet Thread Seal Tape UHMW Sheet compared to PTFE Sheet (TFE sheets) UHMW Sheet compared to PTFE Sheet (TFE sheets) ptfe thread sealant

UHMW (Ultra High Molecular Weight Polyethylene) and PTFE Sheet (PolyTetraFlouroEthylene) are very similar materials, and yet very different at the same time. They both possess certain characteristics that make them similar to each other. For instance, they both have a very low co-efficient of friction, which means they are great for sliding applications and are easy to machine.

Both of these materials are very resistant to chemicals such as chlorine and some acids and have great wear resistance. They have low to no water absorption. They also are FDA approved for handling food. PTFE and UHMW Polyethylene are both nearly impossible to bond (without treatment) and are susceptible to sagging under tensile load which is called ‘creep’. These both have very low coefficient of friction and work well for wear strips, slide pads and truck liners to make it easy to empty. These two materials are different in many ways also, and choosing between the two materials for a specific job is critical.

Below are a few examples of how these two materials are different.

1. UHMW is a polyolefin and PTFE is a fluoropolymer. Polyolefins are double bonded carbon while Fluoropolymers are carbon and fluorine bonded. UHMW is a monomer which is consisted of one atom that will bond with another to form a polymer. PTFE is a polymer which is made up of a repeating chain of monomers.UHMW Ultra High Molecular Weight Polyethylene Truck Lining UHMW Sheet compared to PTFE Sheet (TFE sheets) UHMW Sheet compared to PTFE Sheet (TFE sheets) uhmw truck lining

2. PTFE has a higher temperature range than UHMW. The PTFE has a continuous use temperature of 500 degrees F. UHMW is much lower with a continuous use temperature of 200 degrees F and a melting point of 271 degrees F. The UHMW starts to become become soft at higher temperatures while the PTFE is much more resistant and with a melting point of 621 degrees F.

3. UHMW has higher abrasion resistance than PTFE. Both have great impact and wear resistance but because of UHMW having a molecular weight between 2-6 million making it the best wear resistance material in the plastic family, it makes it ideal to take wear and impact over a wider range and longer period of time without losing its properties.

4. UHMW has a much lower density than PTFE. This makes UHMW able to float in water while Fluoropolymers are significantly heavier (almost twice the density of UHMW) and would sink.

5. PTFE has excellent electrical and thermal properties. The virgin grade of PTFE is a better insulator and exhibits better electrical properties which can be used in radio frequencies, cables and circuit boards while UHMW cannot.

6. UHMW is much less expensive than the Fluoropolymers. Especially recently, PTFE has become harder to come by, and during the last 18 months there has been a global shortage of a key raw material called fluorspar that is used to make all Fluoropolymer materials. The ability to take lots of wear and tear and requiring low long term maintenance makes UHMW more cost effective.

7. The standard color of PTFE is Natural, which is a dense white. The UHMW comes in Natural (a deep milky white) or Black. The UHMW can be produced in many colors, and minimums are rather low. To obtain PTFE in colors is much more difficult, and would also have large minimum orders.

Click here for data sheet comparisons for each material…

UHMW Sheet and Rod Data

PTFE Sheet and Rod Data

Both the UHMW and the PTFE are available as sheet, sheets, sheeting, slab, bar, strip, panels, film, round rod, rods and block. Contact us for assistance with these or other shapes.

PTFE Sheeting Properties

  • Specific Gravity D792 2.14 – 2.24
  • Tensile Strength Yield D638 2,500 – 6,000UHMW Polyethylene Timing Roller UHMW Sheet compared to PTFE Sheet (TFE sheets) UHMW Sheet compared to PTFE Sheet (TFE sheets) UHMW timing roller
  • Tensile Modulus D638 80,000
  • Izod Impact – Notched D256 3.0
  • Hardness – Rockwell D785 D50 – D65
  • Deflection Temp @ 264psi D648 150
  • Deflection Temp @ 66 psi D648 250
  • Co. Thermal Expansion D696 5.5X10-5

UHMW Sheeting Properties

  • Specific Gravity D792 .93 – .94
  • Tensile Strength Yield D638 6,800
  • Coefficient of Friction – Static D1894 .25
  • Izod Impact – Notched D256 No Break
  • Hardness – Rockwell D785 R64
  • Vicat Softening Temp D1525 260
  • Deflection Temp @ 66 psi D648 174
  • Co. Thermal Expansion D696 11.0X10-5

These are just some examples of plastic materials being similar, and yet having very different properties. The PTFE Sheet and UHMW Sheet may appear very similar in color and can be used for some of the same applications, but when needed for a specific use or property needed, one might be dramatically better than the other. As the old saying goes, “You should never judge a book by its cover” and the same is true with plastic. Review the properties and test prior to choosing a final material for your application.

Call us for further assistance at 866-832-9315, or click here to contact us with your questions.

Additional Information About UHMW Sheets or Rod Here.

Additional Information About The Discovery Of PTFE Sheet and Rod by Dupont Here

Google+ Author – Hayden Hess

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Topic: UHMW Sheet and PTFE Sheet – A Comparison