He mea ʻona paha ka polypropylene ke wela?

ʻO Polypropylene, i kapa ʻia ʻo PP, he resin thermoplastic a me ka polymer molecular kiʻekiʻe me nā waiwai hoʻoheheʻe maikaʻi, kiʻekiʻe kiʻekiʻe, a me ke kūpaʻa wela kiʻekiʻe. Hoʻohana nui ʻia ia i ka ʻeke meaʻai, nā hue waiu, nā kīʻaha plastik PP a me nā mea e pono ai i kēlā me kēia lā e like me ka plastic-grade plastic, a me nā mea pono hale, nā ʻāpana kaʻa a me nā huahana ʻoihana kaumaha. Akā naʻe, ʻaʻole ia he mea ʻawaʻawa ke wela.

ʻO ka wela ma luna o 100 ℃: ʻAʻole ʻona ka polypropylene maʻemaʻe

Ma ka lumi wela a me ke kaomi maʻamau, ʻo ka polypropylene he mea ʻala ʻole, kala ʻole, ʻona ʻole, semi-transparent granular mea. Hoʻohana pinepine ʻia nā ʻāpana plastik maʻemaʻe PP maʻemaʻe e like me nā linings no nā mea pāʻani plush, a koho pū nā hale hana leʻaleʻa o nā keiki i nā ʻāpana plastik semi-transparent e hoʻohālike i nā hale kākela one no nā keiki e pāʻani ai. Ma hope o ke kaʻina hana e like me ka hoʻoheheʻe ʻana, extrusion, hoʻoheheʻe ʻia, a me ka hoʻoheheʻe ʻana, hana lākou i nā huahana PP maʻemaʻe ʻaʻole i ʻona i ka lumi wela. ʻOiai ke kau ʻia i ka hoʻomehana wela kiʻekiʻe, hiki i nā mahana ma luna o 100 ℃ a i ʻole i loko o kahi moku i hoʻoheheʻe ʻia, hōʻike mau nā huahana PP maʻemaʻe i ka mea ʻole.

Eia nō naʻe, ʻoi aku ka maikaʻi o nā huahana PP maʻemaʻe a ʻoi aku ka maikaʻi o ka hana, e like me ke kūpaʻa māmā maikaʻi ʻole a me ka pale ʻana i ka oxidation. ʻO ka lōʻihi o ke ola o nā huahana PP maʻemaʻe a hiki i ʻeono mahina. No laila, ʻo ka hapa nui o nā huahana PP i loaʻa i ka mākeke nā huahana polypropylene hui ʻia.

ʻO ka wela ma luna o 100 ℃: He mea ʻawaʻawa nā huahana plastik polypropylene

E like me ka mea i ʻōlelo ʻia ma luna nei, maikaʻi ʻole ka polypropylene maʻemaʻe. No laila, i ka wā e hana ai i nā huahana plastic polypropylene, e hoʻohui nā mea hana i nā lubricants, plasticizers, light stabilizers, a me nā mea ʻē aʻe e hoʻomaikaʻi i kā lākou hana a hoʻonui i ko lākou ola. ʻO ka wela kiʻekiʻe loa no ka hoʻohana ʻana i kēia mau huahana plastik polypropylene i hoʻololi ʻia he 100 ℃. No laila, i loko o kahi mahana wela o 100 ℃, e noho mau nā huahana polypropylene i hoʻololi ʻia. Eia nō naʻe, inā ʻoi aku ka mahana wela ma mua o 100 ℃, hiki i nā huahana polypropylene ke hoʻokuʻu i nā plasticizers a me nā lubricants. Inā hoʻohana ʻia kēia mau huahana no ka hana ʻana i nā kīʻaha, nā kīʻaha, a i ʻole nā ​​pahu, hiki ke komo i kēia mau mea hoʻohui i ka meaʻai a i ʻole ka wai a laila e ʻai ʻia e ke kanaka. I ia mau hihia, hiki i ka polypropylene ke lilo i mea make.

He mea ʻona paha ka polypropylene a ʻaʻole paha depends nui ma kona laulā noi a me nā kūlana i ʻike ʻia. I ka hōʻuluʻulu ʻana, ʻo ka polypropylene maʻemaʻe ka mea maʻamau ʻole. Eia nō naʻe, inā ʻaʻole ia he polypropylene maʻemaʻe, inā ʻoi aku ka mahana o ka hoʻohana ʻana ma mua o 100 ℃, hiki ke lilo i mea make.