ʻO ka hoʻopaʻa ʻūlū ʻana a me nā mea e hoʻopaʻa ai i ka wela penei:

1. ʻO ke ala hoʻopaʻa hoʻopaʻa

ʻO nā kiʻina o ka hoʻopaʻa sealing e hoʻopili me ka hoʻopaʻa wela, ke sila anuanu, ka hoʻopili ʻana a me nā mea e pili ana. hemo Hoʻohana pinepine ʻia nā mea hoʻāhu wela, pale a me nā hoʻoheheʻe wela i nā mea hoʻopaʻa wela. ʻO ke kau anuanu e pili ana i ka hiki ke hoʻopaʻa ʻia i ke kaomi ʻana me ka ʻole o ka hoʻomehana ʻana. ʻO ka uhi anuanu maʻamau maʻamau ka uhi o ka lihi i hoʻopili ʻia ma ka lihi o ka ʻeke hāʻawe. Hoʻomaʻamaʻa ʻole ʻia ka sehesive lina i ka wahī mea nunui-ʻāpana, hoʻohana wale ʻia no nā mea ukana i loaʻa ka pepa.

2. Nā mea hoʻopaʻa wela

(1)ʻO Polyethylene (PE) kahi ʻano o ka keʻokeʻo waiū, translucent a me ka opaque waxy paʻa. ʻAneʻane ʻono ʻole ia, nontoxic a ʻoi aku ka māmā ma mua o ka wai. ʻO ke kaulahao PE macromolecular kahi maʻalahi a maʻalahi hoʻi e crystallize. He mea paʻakikī ia i ka mahana wela. Ma ke ʻano he ʻūlū, ʻo ka hemahema nui o ka PE ka maikaʻi ʻole o ka ea, ke kiʻekiʻe o ke ea i ke kinoea a me ka mahu kōkō, ka ikaika haʻahaʻa a me ka pale wela; he maʻalahi e hoʻohaʻahaʻa ʻia e ka mālamalama, ka wela a me ka pou, no laila hoʻohui pinepine ʻia ka antioxidant a me ka mālamalama a me ka mea hoʻonā wela i nā huahana PE e pale aku i ka ʻelemakule; He pilikia maikaʻi ʻole ka PE i ke kūpikipiki ʻana i ke kūpaʻa, a ʻaʻole kūpaʻa i ka hū o ka h2s04 nui, HNO3 a me kāna oxidant, a e holoi ʻia e kekahi mau hydrocarbons aliphatic a i ʻole nā ​​hydrocarbons chlorinated ke wela ʻia; maikaʻi ʻole ka hana paʻi ʻana o PE, a poli ʻole ka ʻili, no laila pono e mālama ʻia ka hana corona ma mua o ka paʻi ʻana a me ka hoʻopaʻa maloo ʻana e hoʻomaikaʻi ai i ka pilina a me ka pilina maloʻo o ka ʻīnika paʻi.

Hoʻohana ʻia ʻo PE no ka hoʻopili hoʻā wela me nā mea nui:
① haʻahaʻa polyethylene (LDPE), ʻike ʻia ʻo polyethylene kiʻekiʻe;
② polyethylene kiʻekiʻe (HI) PE, ʻike ʻia ʻo polyethylene haʻahaʻa haʻahaʻa;
③ waena polyethylene (nu) PE :); laina polyethylene haʻahaʻa haʻahaʻa (LLDPE);
④ metallocene catalyzed polyethylene.

(2)ʻO nā waiwai o ke kiʻi polypropylene hoʻolei (CPP) i hoʻohana ʻia no ka mea e hoʻopaʻa ai i ka wela i ʻokoʻa iki aʻe mai ka polypropylene oriented biaxially ma muli o kāna hana ʻokoʻa. Hōʻike ʻia nā mea maikaʻi a me nā maikaʻi ʻole o ka CPP i nā ʻike pili o "polypropylene".

(3) ʻO ka PVC (hoʻopōkole ʻia e like me PVC) kahi resin kala ʻole, aniani a paʻakikī hoʻi me ka polarity molekole ikaika a me ka ikaika intermolecular ikaika, no laila he paʻakikī maikaʻi a me kahi ʻōmole paʻa paʻa.

ʻOi aku ka ʻoi aku ka makepono a ʻoi aku ka maʻalahi o PVC. Hiki ke hana ʻia i loko o nā pahu paʻa paʻa, nā huʻupuʻu aniani a me nā kiʻi ʻoniʻoni hikiwawe a me nā mea humuhumu lula ea. Ma muli o kona ʻino a me ka popopo decomposition, ke emi nei kona ʻai ʻana a hoʻololi hou ʻia e nā mea ʻē aʻe.

(4) EVA (ethylene vinyl acetate copolymer) poli (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) ( EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (eva-eva) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA. ʻO EVA kahi translucent a i ʻole iki waiū keʻokeʻo i hoʻomākaukau ʻia e ka copolymerization o ka ethylene a me ka vinylacetic acid winika. Hoʻololi kona mau waiwai me ka ʻike o nā monomers ʻelua. No laila, ke koho ʻana i ke ʻano o EVA, pono e hoʻoholo ʻia e like me ka hoʻohana ʻana, a hiki ke hoʻohana ʻia e like me ka plastic, adhesive hoʻoheheʻe wela a me ka uhi. .
Hoʻohana ākea ʻo EVA ma ke ʻano he ʻaoʻao i loko o ke kiʻiona hui no ka maikaʻi o ka paʻa a me ka hoʻohaʻahaʻa wela wela. Hoʻohana ʻia ia i nā mea hoʻopili, nā pale, nā pale, ka hoʻīpī uea a me ka mea lawe kala me kāna mea hoʻopili maikaʻi (maikaʻi a i ʻole kekahi drillability me nā mea polar a me nā mea ʻole polar).

(5)ʻO ka PVDC (polyvinylidene chloride) pili pinepine ʻo PVDC i ka copolymer o vinylidene chloride. ʻO ka polymer i loaʻa i ka polymerization he crystallinity kiʻekiʻe, kahi palupalu kiʻekiʻe (185-200ʻc) a kokoke i ka mahana decomposition (210-2250). Loaʻa iā ia ka launa ʻole maikaʻi me ka mea maʻamau maʻamau, no laila paʻakikī e hoʻopili ʻia.
ʻO ka PVDC kahi mea ikaika a aniani me ka crystallinity kiʻekiʻe a me ka ʻōmaʻomaʻo melemele. He haʻahaʻa haʻahaʻa kona lawe i ka wai e ale i ke kinoea, ke kinoea a me ka pilau, a he kūpaʻa kūpalu maikaʻi loa ia, ka paʻa o ka ea a me ka paʻa ʻana o ke ʻala. He mea maikaʻi palena palena kiʻekiʻe maikaʻi loa ia. Kūpaʻa ia i ka waikawa, alkali a me nā mea hoʻoheheʻe like ʻole, aila kūpale, refactory a me ka hoʻopau ponoʻī ʻana iā ia iho.