EPDM roj hmab, ib hom roj hmab hluavtaws, yog elastomer uas yog tus cwj pwm los ntawm ntau yam kev siv. E yog hais txog ethylene, P rau propylene, D rau diene thiab M yog hais txog nws qhov kev faib tawm hauv ASTM tus qauv D-1418. Chav kawm M suav nrog cov roj hmab uas muaj cov saw hlau saturated ntawm hom polymethylene.

EPDM nthuav tawm kev sib raug zoo nrog cov dej tsis muaj hluav taws xob hydraulic, ketones, dej kub thiab txias, thiab alkalis, thiab tsis zoo sib xws nrog cov roj feem ntau, roj av, roj av, roj tsw qab thiab aliphatic hydrocarbons, halogenated cov kuab tshuaj thiab cov concentrated acids.

Cov khoom tseem ceeb ntawm EPDM yog nws qhov tshwj xeeb kub, ozone thiab huab cua tsis kam. Kev tiv thaiv rau cov khoom siv polar thiab cov chav dej kuj zoo, nrog rau nws cov khoom zoo tshaj plaws insulating. Peb cov khoom muag ntawm EPDM roj hmab pob muaj xws li diamter qhov ntau thiab tsawg ntawm 1/4", 1 3/8", thiab ntau dua.

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