1. Haʻahaʻa haʻahaʻa a me ka hoʻopiha kiʻekiʻe
He laholio ka laholio Ethylene-propylene me ka haʻahaʻa o ka density, me ka density o 0.87. Eia kekahi, hiki ke hoʻopiha ʻia me ka nui o ka aila a me EPDM.
Hiki i ka hoʻohui ʻana i nā mea hoʻopihapiha ke hōʻemi i ke kumukūʻai o nā huahana laholio a uku no ke kumukūʻai kiʻekiʻe o ka laholio ethylene propylene maka. No ka laholio ethylene propylene me ka waiwai Mooney kiʻekiʻe, ʻaʻole i emi nui ka ikehu kino a me ka mechanical o ka hoʻopiha kiʻekiʻe.
2. Ke kū'ē ʻana i ka wā ʻelemakule
He kūpaʻa maikaʻi loa ka ʻōpala Ethylene-propylene i ke aniau, ke kūpaʻa ozone, ke kūpaʻa wela, ke kūpaʻa waikawa a me ka alkali, ke kūpaʻa wai, ke kūpaʻa kala, nā waiwai uila, nā waiwai hoʻopiha aila a me ke kahe ʻana i ka mahana o ka lumi. Hiki ke hoʻohana ʻia nā huahana ʻōpala Ethylene-propylene no ka manawa lōʻihi ma 120°C, a hiki ke hoʻohana pōkole a i ʻole intermittent ma 150-200°C. ʻO ka hoʻohui ʻana i nā antioxidants kūpono e hoʻonui i kona mahana hoʻohana. Hiki ke hoʻohana ʻia ka ʻōpala EPDM i hoʻopili ʻia me ka peroxide ma lalo o nā kūlana paʻakikī. Hiki i ka ʻōpala EPDM ke hiki aku ma mua o 150h me ka ʻole o ka haki ʻana ma lalo o nā kūlana o ka ozone concentration 50pphm a me 30% stretching.
3. Ke kūpaʻa ʻana i ka palaho
No ka mea, ʻaʻohe polarity o ka ethylene propylene rubber a me ke kiʻekiʻe haʻahaʻa o ka unsaturation, he kūpaʻa maikaʻi kona i nā kemika polar like ʻole e like me nā alcohols, acids, alkalis, oxidants, refrigerants, detergents, nā aila holoholona a me nā mea kanu, ketones a me nā greases. Akā, he paʻa ʻole kona i nā mea hoʻoheheʻe momona a me nā mea ʻala (e like me ka gasoline, benzene, etc.) a me ka aila mineral. E emi pū ka hana ma lalo o ka hana lōʻihi o ka waikawa i hoʻopaʻa ʻia. Ma ISO/TO 7620, ua hōʻiliʻili ʻia ka ʻike ma kahi o 400 mau ʻano kemika kinoea a me nā wai corrosive i nā ʻano like ʻole o ka rubber, a ua kuhikuhi i nā pae 1-4 e hōʻike i ko lākou kiʻekiʻe o ka hana, a me ka hopena o nā kemika corrosive i nā waiwai rubber.
Ka nui o ka pehu ʻana o ka papa/% Ka waiwai hōʻemi paʻakikī Ka hopena i ka hana
1 <10 <10 ʻuʻuku a ʻaʻole paha
2 10-20 <20 liʻiliʻi
3 30-60 <30 waena
4 >60 >30 koʻikoʻi
4. Ke kū'ē i ka mahu wai
He kūpaʻa maikaʻi loa ka ʻōpala Ethylene-propylene i ka mahu wai a ua manaʻo ʻia he ʻoi aku ka maikaʻi ma mua o kona kūpaʻa wela. I loko o ka mahu wela nui 230℃, ua noho mau ke ʻano o ka EPDM ma hope o kahi kokoke i 100h. Eia nō naʻe, ma lalo o nā kūlana like, ua ʻike ʻia ka ʻōpala fluorine, ka ʻōpala silicone, ka ʻōpala fluorosilicone, ka ʻōpala butyl, ka ʻōpala nitrile, a me ka ʻōpala kūlohelohe i ka hōʻino nui ʻana o ke ʻano ma hope o kahi manawa pōkole.
5. Ke kūpaʻa wai wela loa
ʻOi aku ka maikaʻi o ke kūpaʻa ʻana o ka ʻōpala Ethylene-propylene i ka wai wela loa, akā pili loa ia i nā ʻōnaehana vulcanization āpau. ʻO ka ʻōpala Ethylene-propylene me ka dimorpholine disulfide a me TMTD ma ke ʻano he ʻōnaehana vulcanization, ma hope o ka hoʻokomo ʻia ʻana i loko o ka wai wela loa ma 125°C no 15 mau mahina, ʻaʻole nui ka loli o nā waiwai mechanical, a ʻo ka nui o ka hoʻonui ʻana o ka leo he 0.3% wale nō.
6. Hana uila
He maikaʻi loa nā waiwai insulation uila a me ke kūpaʻa corona o ka ethylene-propylene rubber, a ʻoi aku ka maikaʻi o kona mau waiwai uila ma mua o ka styrene-butadiene rubber, chlorosulfonated polyethylene, polyethylene a me ka cross-linked polyethylene.
7. Ka maʻalahi
No ka mea, ʻaʻohe o nā mea pani polar i loko o ke ʻano molekala o ka ethylene-propylene rubber, haʻahaʻa ka ikehu cohesive o ka molekala, a hiki i ke kaulahao molekala ke mālama i ka maʻalahi ma kahi ākea, ʻo ka lua wale nō i ka negotiable kūlohelohe a me ka butadiene rubber, a hiki ke mālama ʻia i nā mahana haʻahaʻa.
8. Hoʻopili ʻana
ʻAʻohe hui hana o ka ʻōpala Ethylene-propylene ma muli o kona ʻano molekala a he haʻahaʻa ka ikehu hoʻopili. Eia kekahi, maʻalahi ka pua ʻana o ka ʻōpala, a ʻilihune loa kona hoʻopili ponoʻī a me ka hoʻopili like ʻana.
Ka manawa hoʻouna: Nov-17-2021
