Choosing Your Plastic

Posted: March 8, 2016 in Education
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The question comes up a lot in the DIY community: “I am planning to make _______ so what plastic do I need?” The good news is selecting a plastic for your application is very similar to how heavy industry would select a plastic for their projects. You need to select a plastic based on certain properties it gives you, not some sort of bias to what you “heard” worked – and especially not based on color!

So when thinking about your what you need for your application consider the properties of these plastics:

 

UHMW Polyethylene:

-Slick, low-coefficient of friction

-Good wear properties

-Good abrasion properties

-Thermoformable (at home)

 

Polyurethane:

-Elastomer: will regain its shape after depression (excellent as mallet heads)

-Excellent cut & tear resistance

 

Nylon:

-Bearings (takes up to 4000PSI)

-Wear plates

 

Tuffkast:

-Replaces nylon in cold operating environments or where impact is a concern

 

Acetal:

-Small parts, replacing metal

-Where machinability is key, can hold tight tolerances

-Replacing nylon in “wet” applications

 

PVC:

-Anywhere a “frame” is needed.

 

Industrial laminates/Phenolic/Micarta:

-Mechanical or electrical applications

-High load bearing

 

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