He ʻawaʻawa paha ka PP ma hope o ka wela?

2022-11-09


  ʻO ka papa pāʻani PP he resin thermoplastic, i hoʻopau ʻia ʻo PP ma ka ʻōlelo Pelekania. He ʻano ia o ka polymer molecular kiʻekiʻe me ka hoʻoheheʻe maikaʻi ʻana, ke kūpaʻa flexure a me ke kūpaʻa wela kiʻekiʻe. Hiki ke hoʻohana nui ʻia e like me ka meaʻai meaʻai i loko o ka ʻeke meaʻai, nā hue waiu, nā kīʻaha plastik PP a me nā mea e pono ai i kēlā me kēia lā, a me nā mea pono hale, nā ʻāpana kaʻa a me nā huahana ʻoihana kaumaha ʻē aʻe. I kēia lā, ʻo kā mākou manaʻo e pili ana i ka polypropylene ma hope o ka hoʻomehana ʻana?


ʻO ka papa pāʻani PP


  ʻO ka wela ma luna o 100 ℃: ʻaʻohe mea ʻawaʻawa ka polypropylene maʻemaʻe.


  Ma lalo o ka mahana maʻamau a me ke kaomi, polypropylene ʻaʻohe ʻala, kala ʻole, ʻona ʻole a me nā granules translucent. ʻO ka maʻamau, hoʻohana pinepine ʻia nā ʻāpana plastik PP maʻemaʻe ʻole e like me ka uhi ʻana o nā mea pāʻani. E koho pū nā hale hana leʻaleʻa o nā keiki i nā ʻāpana plastik PP translucent e hoʻohālikelike i nā hale kākela one no nā keiki e pāʻani ai. Ma hope o ka hoʻoheheʻe ʻia ʻana o nā ʻāpana PP maʻemaʻe, hoʻokuʻu ʻia, puhi ʻia, a hoʻokomo ʻia i loko o nā huahana PP maʻemaʻe, ʻaʻohe mea ʻawaʻawa nā huahana PP maʻemaʻe i ka lumi wela. Inā ua wela lākou i ke kiʻekiʻe wela, ʻoiai inā ʻoi aku ka kiʻekiʻe o ka mahana ma mua o 100 ℃ a i ʻole a hiki i ke kūlana hoʻoheheʻe, ʻaʻole ʻona nā huahana PP maʻemaʻe. Eia naʻe, he kiʻekiʻe ke kumukūʻai o nā huahana PP maʻemaʻe a me ka hana maikaʻi ʻole, e like me ke kūpaʻa māmā maikaʻi ʻole a me ka oxidation, a ʻo ke ola lawelawe o nā huahana PP maʻemaʻe hiki ke hiki i ʻeono mahina ma ka hapa nui, No laila, ʻo ka hapa nui o nā huahana PP e holo nei i ka mākeke he huahana polypropylene hybrid. .


  ʻO ka wela ma luna o 100 ℃: Pepa plastik PP ʻawahia.


  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, lightfast agents a me nā mea ʻē aʻe e hoʻomaikaʻi i kā lākou hana a hoʻonui i ko lākou ola. ʻO ka wela kiʻekiʻe loa o nā huahana plastik polypropylene i hoʻohui ʻia he 100 ℃. No laila, ma lalo o 100 ℃ ka hoʻomehana honua, ʻike ʻia nā huahana polypropylene hybrid ʻaʻohe mea ʻawaʻawa, akā naʻe, ke piʻi ka mahana wela ma mua o 100 ℃, e hoʻokuʻu nā huahana polypropylene i nā plasticizers a me nā lubricants. Inā hana ʻia ia mau huahana i kīʻaha, kīʻaha a me nā barela, e komo kēia mau mea hoʻohui i ka meaʻai a me ka wai, a laila komo i ke kino kanaka ma ka waha. I kēia hihia, he mea make ka polypropylene. ʻO ka polypropylene he mea ʻona a ʻaʻole ʻole e pili ana i kāna kiko a me nā kūlana. I ka hōʻuluʻulu ʻana, ʻaʻohe mea ʻawaʻawa ka polypropylene maʻemaʻe. Inā ʻaʻole ia he polypropylene maʻemaʻe, ʻoi aku ka ʻawaʻawa o kona hoʻohana ʻana i ka mahana ma mua o 100 ℃.


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