ʻO ka wehewehe pōkole:

ʻO nā mea maikaʻi a me nā pōʻino o ka PDM hose: kūʻokoʻa kūʻokoʻa, insulation uila a me ke kūpaʻa ozone.ʻOi aku ka maikaʻi o ka wā, ka pale ozone, ka pale wela, ka wai a me ka pale alkali, ke kū ʻana o ka mahu wai, ka paʻa o ka waihoʻoluʻu, nā waiwai uila, nā waiwai hoʻopiha aila a me ka wai wela o ka lumi.ʻO nā mea hoʻomaʻemaʻe, nā aila holoholona a me nā mea kanu, nā ketones a me nā momona a pau ke kūpaʻa maikaʻi;akā ʻaʻole maikaʻi ko lākou kūpaʻa i nā mea momona a me nā mea ʻala (e like me ka ʻaila, benzene, etc.) a me nā aila mineral.Ma lalo o ka hana lōʻihi o ka acid concentrated, e hoʻemi ana ka hana i ka pale ʻana i ka mahu wai a manaʻo ʻia ʻoi aku ka maikaʻi ma mua o kona kūpaʻa wela.Ma 230 ℃ superheated mahu, ʻaʻohe loli i ka helehelena ma hope o 100h.Akā, ma lalo o nā kūlana like, ua ʻike ʻia ka hoʻohaʻahaʻa ʻana o ka hiʻohiʻona ma hope o ka manawa pōkole.No ka mea, ʻaʻohe polar substituents i loko o ka molecular structure of ethylene-propylene rubber, he haʻahaʻa ka ikehu cohesive o ka mole, a hiki i ke kaulahao mole ke hoʻomau i ka maʻalahi i ka laulā ākea, ʻelua wale nō i ka lāʻau maoli a me ka rubber butadiene, a hiki ke hoʻomau ʻia. mālama ʻia ma nā mahana haʻahaʻa.Ethylene-propylene rubber nele i nā pūʻulu hana ma muli o kona ʻano mole, he haʻahaʻa ka ikehu cohesive, a he maʻalahi ka pua, a ʻo kona hoʻopili ponoʻī a me ka hoʻopili like ʻana he ʻilihune loa.