ʻO nā mea lāʻau lapaʻau maʻamau——ke ʻano o ka EPDM

ʻO nā mea lāʻau lapaʻau maʻamau——ke ʻano o ka EPDM

Pōmaikaʻi:
ʻO ke kūpaʻa ʻelemakule maikaʻi loa, ka pale ʻana i ka wā, ka insulation uila, ka pale ʻana i ka corrosion a me ka elasticity hopena.

Nā hemahema:
ʻO ka wikiwiki o ka hoʻōla ʻana; He mea paʻakikī ke hoʻohui ʻia me nā ʻōpala unsaturated ʻē aʻe, a ʻo ka hoʻopili ponoʻī ʻana a me ka hoʻopili like ʻana he ʻilihune loa, no laila ʻilihune ka hana ʻana.

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

Nā waiwai: nā kikoʻī
1. Haʻahaʻa haʻahaʻa a me ka hoʻopiha piha
ʻO ka ethylene propylene rubber kahi ʻano lāʻau me ka haʻahaʻa haʻahaʻa o 0.87. Eia hou, hiki ke hoʻopihaʻia ka nui o kaʻaila a hiki ke hoʻohuiʻia nā mea hoʻopihapiha, hiki ke hoʻemi i ke kumukūʻai o nā huahana kāpili a hana i ke kumukūʻai kiʻekiʻe o ka'ōpala maka o ka ethylene propylene rubber. Eia kekahi, no ka ethylene propylene rubber me ka waiwai Mooney kiʻekiʻe, ʻaʻole e hoʻemi nui ʻia ka ikaika kino a me ka mechanical ma hope o ka hoʻopiha piha ʻana.

2. Ke kūʻē ʻana i ka ʻelemakule
ʻO ka ethylene propylene rubber ka maikaʻi loa o ka wā, ke kū'ē ozone, ke kū'ē wela, ke kū'ēʻana i ka waikawa a me ka alkali, ke kū'ēʻana o ka mahu wai, ka paʻa o ka waihoʻoluʻu, ka hana uila, ka hoʻopihaʻana i kaʻaila a me ka wai wela o ka lumi. Hiki ke hoʻohana ʻia nā huahana ethylene propylene rubber 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 nā antioxidant kūpono. Hiki ke hoʻohana ʻia ka EPDM crosslinked me ka peroxide ma lalo o nā kūlana koʻikoʻi. Inā he 50 pphm ka nui o ka ozone o EPDM a he 30% ka manawa hoʻolōʻihi, hiki i ka EPDM ke hiki i 150 mau hola me ka ʻole o ka haki ʻana.

3. Ke kū'ē i ka corrosion
Ma muli o ka nele o ka polarity a me ka haʻahaʻa haʻahaʻa o ka ethylene propylene rubber, he kūʻē maikaʻi ʻo ia i nā kinikona polar like ʻole e like me ka waiʻona, ka waikawa, ka alkali, oxidant, refrigerant, detergent, holoholona a me ka aila mea kanu, ketone a me ka momona; Eia nō naʻe, ʻaʻohe paʻa paʻa i nā mea momona a me nā mea ʻala (e like me ka ʻaila, benzene, etc.) a me nā aila mineral. E emi ana ka hana ma lalo o ka hana lōʻihi o ka waikawa concentrated. I ka ISO/TO 7620, ʻohi ʻia nā ʻikepili i nā hopena o kahi kokoke i 400 corrosive gaseous a me nā kemika wai i nā waiwai o nā ʻāpana like ʻole, a ua kuhikuhi ʻia nā māka 1-4 e hōʻike i ko lākou hopena. ʻO nā hopena o nā kinikona corrosive i nā waiwai o nā rubbers penei:

Ka hopena o ka nui o ka nui o ka pehu ʻana o ka helu /% ka ho'ēmi paʻakikī ma nā waiwai
1<10<10 Lihi a ʻole
2 10-20<20 liʻiliʻi
3 30-60<30 Medium
4>60>30 koʻikoʻi

4. Ke kū'ē i ka mahu wai
Loaʻa i ka EPDM ke kūpaʻa mahu maikaʻi a ua manaʻo ʻia ʻoi aku ka maikaʻi ma mua o kona kūpaʻa wela. Ma ka mokumahu wela 230 ℃, ʻaʻole loli ke ʻano ma hope o 100 mau hola. Eia nō naʻe, ma lalo o nā kūlana like, ʻo ka hiʻohiʻona o ka lāʻau fluorine, ka lāʻau silika, ka lāʻau fluorosilicone, ka pulu butyl, ka nitrile a me ka ʻōpala maoli i hōʻemi nui ʻia i ka manawa pōkole.

5. Ke kū'ē i ka wai wela nui
ʻO ka Ethylene propylene rubber nō hoʻi ke kūʻē maikaʻi i ka wai wela, akā pili pili ia i nā ʻōnaehana vulcanization a pau. Ua loli iki ka waiwai o ka ethylene propylene rubber (EPR) me ka dimorphine disulfide a me ka TMTD ma hope o ka hoʻokomo ʻia ʻana i loko o ka wai wela wela 125 ℃ no 15 mau mahina, a ʻo 0.3% wale nō ka nui o ka hoʻonui.

6. Hana uila
ʻOi aku ka maikaʻi o ka ʻili uila a me ka pale ʻana o ka ethylene propylene, a ʻoi aku ka maikaʻi o kona mau waiwai uila ma mua o a kokoke paha i ka styrene butadiene rubber, chlorosulfonated polyethylene, polyethylene a me ka polyethylene cross-linked.

7. Elasticity
No ka mea, ʻaʻohe polar substituents o ka ethylene propylene rubber i loko o kona molecular structure a me ka ikehu cohesion molecular haʻahaʻa, hiki i kona kaulahao molekala ke hoʻomau i ka maʻalahi ma kahi ākea, ʻelua wale nō i ka rubber maoli a me ka cis polybutadiene rubber, a hiki ke mālama i nā haʻahaʻa haʻahaʻa.

8. Hoʻopili
Ma muli o ka nele o nā pūʻulu ikaika i ka molecular structure o ka ethylene propylene rubber, ua haʻahaʻa ka ikehu cohesion, a ua maʻalahi ka pulupulu ʻana, no laila ʻilihune loa ka pili pono ʻana a me ka pili like.