He aha ka ʻokoʻa ma waena o ka Silicone Rubber a me ka EPDM?

I ke koho ʻana i kahi laholio no ka hoʻohana ʻana, pono nā ʻenekinia he nui e koho ma waena o ke koho ʻana i ka silicone a i ʻole EPDM. Makemake mākou i ka silicone (!) akā pehea e kūlike ai nā mea ʻelua? He aha ka EPDM a inā ʻike ʻoe iā ʻoe iho e pono e koho ma waena o nā mea ʻelua, pehea ʻoe e hoʻoholo ai? Eia kā mākou alakaʻi wikiwiki i ka EPDM…

 

He aha ka EPDM?

ʻO EPDM ke kū nei no Ethylene Propylene Diene Monomers a he ʻano synthetic rubber kiʻekiʻe. ʻAʻole ia e kū i ka wela e like me ka silicone akā hiki iā ia ke kū i nā mahana kiʻekiʻe a hiki i 130°C. Ma muli o kēlā, hoʻohana ʻia ia ma ke ʻano he ʻāpana i loko o nā ʻano ʻoihana like ʻole e like me ka ʻoihana, ke kūkulu ʻana a me ke kaʻa. I nā mahana haʻahaʻa, e hiki aku ka EPDM i kahi brittle point ma -40°C.

Ua kaulana nō hoʻi ka EPDM ma ke ʻano he laholio waho no ka mea he kūpaʻa ia i ka wā e like me ke kūpaʻa ʻana o ka waikawa a me ka alkali. No laila, e ʻike pinepine ʻoe e hoʻohana ʻia ana no nā mea e like me nā sila puka makani a me ka puka a i ʻole nā ​​​​​​pepa pale wai.

Loaʻa iā EPDM ka pale maikaʻi i ka ʻāʻī ʻana, ka ulu ʻoki a me ke kūpaʻa i ka haehae.

 

He aha hou aʻe ka mea hiki ke hāʻawi ʻia e ka silicone?
ʻOiai ʻo ka silicone a me ka EPDM e kaʻana like i nā hiʻohiʻona he nui e like me ke kūpaʻa maikaʻi loa i ke kaiapuni, aia kekahi mau ʻokoʻa koʻikoʻi a he mea nui e hoʻomaopopo i kēia mau mea i ka wā e hana ai i kāu mau hoʻoholo kūʻai.

He hui ʻia ka Silicone o ke kalapona, ka hydrogen, ka oxygen a me ka silicone a hāʻawi kēia hui ʻana i nā pono he nui ʻaʻole i loaʻa i ka EPDM. ʻOi aku ka pale ʻana o ka Silicone i ka wela, hiki ke kū i nā mahana a hiki i ka 230°C me ka mālama ʻana i kona mau waiwai kino. Eia kekahi, he elastomer sterile nō hoʻi ia a no laila ua kaulana ia i loko o nā ʻoihana meaʻai a me nā mea inu. I nā mahana haʻahaʻa, ʻoi aku ka silicone ma mua o ka EPDM a ʻaʻole e hiki i kahi brittle a hiki i ka -60°C.

ʻOi aku ka palupalu o ka silicone a hāʻawi i ka elongation ʻoi aku ma mua o ka EPDM. Hiki ke hana ʻia e like me ke kūpaʻa i ka haehae e like me ka EPDM. ʻO kēia mau ʻano ʻelua e kūpono ai no ka hoʻohana ʻana ma ke ʻano he membrane vacuum i nā mīkini i hoʻohana ʻia e hana i nā panela solar a me nā lako laminated, i kapa pinepine ʻia he mau mīkini hana vacuum.

He elastomer paʻa loa ka Silicone a ma muli o kēia, manaʻo nā mea kūʻai aku he ʻoi aku ka maikaʻi o ka silicone ma ke ʻano he hopena palekana lōʻihi ma muli o kēia. ʻOiai ua ʻike ʻia ka silicone ʻoi aku ke kumukūʻai ma waena o nā mea ʻelua, ʻoi aku ka pōkole o ke ola o ka EPDM ma mua o ka silicone a no laila pono e hoʻololi pinepine ʻia i ka hoʻohana ʻana. ʻO ka hopena, ʻoi aku ke kumukūʻai lōʻihi ma mua o ka silicone.

ʻO ka mea hope loa, ʻoiai e pehu ka EPDM a me ka silicone inā waiho ʻia i loko o ka ʻaila no ka manawa lōʻihi ma nā mahana kiʻekiʻe, he kūpaʻa ka silicone i nā ʻaila meaʻai ma ka mahana o ka lumi ʻo ia ke kumu e hoʻohana ʻia ai i ka hana ʻaila meaʻai ma ke ʻano he sila a me nā gaskets no nā mīkini hana.

 

Pehea e koho ai ma waena o nā mea ʻelua?
ʻOiai ʻo kēia alakaʻi pōkole e hōʻuluʻulu wale ana i kekahi o nā ʻokoʻa ma waena o nā mea ʻelua, ʻo ke ala maikaʻi loa e hoʻoholo ai i ka laholio āu e pono ai, ʻo ia ka hoʻomaopopo ʻana i ke kumu o ka hoʻohana ʻana a me ka hoʻopili pololei ʻana. ʻO ka ʻike ʻana pehea ʻoe e makemake ai e hoʻohana, nā kūlana e pili ana iā ia a pehea ʻoe e pono ai e hana e ʻae iā ʻoe e loaʻa kahi ʻike maopopo loa e pili ana i ka laholio e koho ai.

Eia kekahi, e noʻonoʻo pono i nā ʻano e like me ka ikaika, ka maʻalahi a me ke kaumaha e pono ai ka mea e kū i ka mea no ka mea hiki i kēia mau mea ke lilo i mau mea hoʻoholo koʻikoʻi. Ke loaʻa iā ʻoe kēia ʻike hiki i kā mākou alakaʻi piha iā Silicone Rubber vs EPDM ke hāʻawi iā ʻoe i ka ʻike hohonu e pono ai ʻoe e hoʻoholo i kāu hoʻoholo hope loa.

Inā makemake ʻoe e kūkākūkā i kāu mau koi papahana me kekahi o kā mākou hui a laila loaʻa mau kekahi. E kelepona mai iā mākou.