PRC - Industrial Rubber Products - Natural Rubber - PRC NR 35
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NATURAL RUBBER PRCNR - 35 PRODUCT INFORMATION SHEET

   TENSILE:    ASTM D412    2500 min.

% ELONGATION: ASTM D412 650 min.

DUROMETER: ASTM D2240 35 +/-5

SPECIFIC GRAVITY: ASTM D927 1.00 +/-.03

WEIGHT: 1.30 lbs. ft² @ .25" thick

POLYMER TYPE: 100% Natural Rubber

COLOR: Tan

PRODUCT:  PRC Mat'l NR - 35 is a soft cream color pure gum natural rubber for general purpose abrasion and HCL service.   All ingredients conform to the FDA White List.  Cured durometer is from 30 to 45 Shore A depending on curing conditions utilized.
ADHESIVES: The standard Chemlok Systems for natural rubber are recommended.  The system may include Chemlok 289 (green) Primer, Chemlok 290 (red) Bonding Adhesive, & Chemlok 286 (black) Tack Cement.
CURE CONDITIONS:  Under ideal laboratory conditions using a Rheometer the following cure time/temperature parameters occurred.  However, as the actual time to heat, ambient temperature, mass of medal and other issues greatly effect cure times, a suggested time/temperature parameter is included for reference:

IDEAL LAB CONDITIONS SUGGESTED TIME/TEMP @ 1/4"

280F (137.8C) 34.5 psig 28.5 min. 60 min.

260F (126.7C) 20.7 psig 53.9 min. 100 min.

250F (121.1C) 15.1 psig 67.8 min. 1.5hours

212F (100.0C) ) psig 422 min. Atmospheric 16hours

                 

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