Natural Rubber (NR) is harvested as latex from Hevea rubber trees. Polyisoprene (IR) is a synthetic version of Natural Rubber. These polymers are known for having excellent elongation, rebound, and energy absorption properties.

 

Because it is an organic product, Natural Rubber does have more problems with consistency from lot-to-lot than most man made polymers. Individuals with Latex allergies can respond negatively to Natural Rubber. Both Natural Rubber and Polyisoprene tend to revert when used at elevated temperatures.

 

The operating temperature range for these polymers is -50° to 180°F (-45° to 80° C). PAI offers compounds in a hardness range of 30 to 70 durometer. Black is the standard color, but several other colors are available.

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Item #

Nominal Durometer

ASTM Code

Color

Compound Features

RoHS Compliant

REACH Compliant

1302 N/A 30 N/A IR N/A Tan N/A Yes N/A Yes N/A Yes
1303 N/A 30 N/A IR N/A Black N/A General Purpose N/A Yes N/A Yes
1325 N/A 30 N/A IR N/A Cream N/A Yes N/A Yes N/A Yes
1401 N/A 40 N/A IR N/A Tan N/A Yes N/A Yes N/A Yes
1402 N/A 40 N/A IR N/A Black N/A General Purpose N/A Yes N/A Yes
1423 N/A 40 N/A IR N/A Tan N/A Yes N/A Yes N/A Yes
1457 N/A 40 N/A IR N/A Tan N/A Teflon Impregnated N/A Yes N/A Yes
1503 N/A 55 N/A IR N/A Black N/A Yes N/A Yes N/A Yes
1623 N/A 55 N/A IR N/A Black N/A Floats in Water N/A Yes N/A Yes
1620 N/A 60 N/A IR N/A Black N/A General Purpose N/A No N/A No
1720 N/A 70 N/A IR N/A Black N/A Yes N/A No N/A No
1726 N/A 70 N/A IR N/A Black N/A General Purpose N/A Yes N/A Yes
1777 N/A 70 N/A IR N/A Tan N/A Tear Resistant N/A Yes N/A Yes
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