Nā mea laholio maʻamau——ʻano o EPDM

Nā mea laholio maʻamau——ʻano o EPDM

Pōmaikaʻi:
ʻO ke kūpaʻa maikaʻi loa i ka wā kahiko, ke kūpaʻa i ka wā, ka pale uila, ke kūpaʻa i ka pala kemika a me ka elasticity hopena.

Nā hemahema:
Lohi ka wikiwiki o ka hoʻōla ʻana; He paʻakikī ke hoʻohuihui me nā ʻalapona unsaturated ʻē aʻe, a ʻilihune loa ka hoʻopili ponoʻī a me ka hoʻopili like ʻana, no laila ʻilihune ka hana hana.

Ke nānā nei ʻo Ningbo Yokey Automotive Parts Co., Ltd i ka hoʻoponopono ʻana i nā pilikia mea laholio a nā mea kūʻai aku a me ka hoʻolālā ʻana i nā ʻano mea like ʻole e pili ana i nā hiʻohiʻona noi like ʻole.

Nā Waiwai: nā kikoʻī
1. Haʻahaʻa haʻahaʻa a me ka hoʻopiha kiʻekiʻe
ʻO ka ʻōpala Ethylene propylene kahi ʻano ʻōpala me ka haʻahaʻa o ka density o 0.87. Eia kekahi, hiki ke hoʻopiha ʻia ka nui o ka ʻaila a hiki ke hoʻohui ʻia nā mea hoʻopihapiha, hiki ke hōʻemi i ke kumukūʻai o nā huahana ʻōpala a uku no ke kumukūʻai kiʻekiʻe o ka ʻōpala maka o ka ʻōpala ethylene propylene. Eia kekahi, no ka ʻōpala ethylene propylene me ka waiwai Mooney kiʻekiʻe, ʻaʻole e emi nui ka ikehu kino a me ka mechanical ma hope o ka hoʻopiha nui ʻana.

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, ka hana uila, ka hoʻopiha ʻaila a me ke kahe ʻana o ka mahana o ka lumi. Hiki ke hoʻohana ʻia nā huahana ʻōpala Ethylene propylene no ka manawa lōʻihi ma 120 ℃, a hiki ke hoʻohana pōkole a i ʻole intermittent ma 150 - 200 ℃. Hiki ke hoʻonui ʻia ka mahana hoʻohana ma ka hoʻohui ʻana i ka antioxidant kūpono. Hiki ke hoʻohana ʻia ka EPDM crosslinked me ka peroxide ma lalo o nā kūlana paʻakikī. Ke 50 pphm ka nui o ka ozone o EPDM a he 30% ka manawa hoʻolōʻihi, hiki i ka EPDM ke hiki i 150 h me ka ʻole o ka haki ʻana.

3. Ke kūpaʻa ʻana i ka palaho
Ma muli o ka nele o ka polarity a me ka unsaturation haʻahaʻa o ka ethylene propylene rubber, he kūpaʻa maikaʻi kona i nā kemika polar like ʻole e like me ka waiʻona, ka waikawa, ka alkali, ka oxidant, ka refrigerant, ka detergent, ka ʻaila holoholona a me ka mea kanu, ketone a me ka grease; Eia nō naʻe, he paʻa ʻole kona i nā mea hoʻoheheʻe momona a me nā mea ʻala (e like me ka gasoline, benzene, etc.) a me nā 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 nā ʻikepili ma nā hopena o kahi kokoke i 400 mau kemika kinoea corrosive a me nā wai ma nā waiwai o nā ʻano ʻōpala like ʻole, a ua kuhikuhi ʻia nā māka 1-4 e hōʻike i ko lākou hopena. ʻO nā hopena o nā kemika corrosive ma nā waiwai o nā ʻōpala penei:

Ka hopena o ka nui o ka pehu ʻana o ka papa/% ka hoʻemi ʻana o ka paʻakikī ma nā waiwai
1<10<10 ʻAʻole iki a ʻaʻohe 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 EPDM i ka mahu a ua manaʻo ʻia ʻoi aku ka maikaʻi ma mua o kona kūpaʻa wela. I loko o ka mahu wela loa he 230 ℃, ʻaʻole e loli ke ʻano ma hope o kahi kokoke i 100 mau hola. Eia nō naʻe, ma lalo o nā kūlana like, ua hōʻino nui ʻia ke ʻano o ka ʻōpala fluorine, ka ʻōpala silicon, ka ʻōpala fluorosilicone, ka ʻōpala butyl, ka ʻōpala nitrile a me ka ʻōpala kūlohelohe i ka manawa pōkole.

5. Ke kū'ē i ka wai wela loa
Loaʻa i ka ʻōpala Ethylene propylene ke kūpaʻa maikaʻi i ka wai wela loa, akā pili loa ia i nā ʻōnaehana vulcanization āpau. ʻAʻole i loli iki nā waiwai mechanical o ka ethylene propylene rubber (EPR) i vulcanized me dimorphine disulfide a me TMTD ma hope o ka hoʻokomo ʻia ʻana i loko o ka wai wela loa he 125 ℃ no 15 mau mahina, a ʻo ka nui o ka hoʻonui ʻana o ka leo he 0.3% wale nō.

6. Hana uila
He maikaʻi loa ka pale uila a me ke kū'ē ʻana o ka corona i 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 hiki ke hoʻololi
No ka mea, ʻaʻohe o ka ethylene propylene rubber i nā substituents polar i loko o kona ʻano molekala a me ka ikehu cohesion molekala haʻahaʻa, hiki i kona kaulahao molekala ke mālama i ka maʻalahi ma kahi ākea, ʻo ka lua wale nō i ka rubber kūlohelohe a me ka cis polibutadiene rubber, a hiki ke mālama mau i nā mahana haʻahaʻa.

8. Hoʻopili ʻana
Ma muli o ka nele o nā hui hana i loko o ke ʻano molekala o ka ethylene propylene rubber, haʻahaʻa ka ikehu cohesion, a maʻalahi ka rubber e pīpī, no laila ʻilihune loa ka hoʻopili ponoʻī a me ka hoʻopili like ʻana.