ʻOkoʻa ma waena o PET (polyp-benzene) a me PETG

PET: Poly(ethylene terephthalate) He kaʻina hana ikaika kahi e komo pū ai nā ʻoihana like ʻole a i ʻole nā ​​ʻoihana like ʻole o ka ʻoihana like, e hui pū, a ma hope e hui pū. #Mīkini hana pepa PET

PETG: Poly real (ethyleneterephthalateco - 1, 4 - cylclohexylenedimethylene terephthalate) #mīkinihoʻopukapepaGAG

Nā huahana synovial PET#jwellPETsheet

ʻO ka PET polyethylene terephthalate kēia polymer condensation i hoʻohana nui ʻia i ka ʻili ʻōpala meaʻai a me ka fiber textile a me nā kumu ʻē aʻe. I kēia manawa, ke hoʻonui nei kona hoʻohana ʻana ma ke ʻano he mea hoʻopili, ʻaʻole wale no nā ʻōmole inu soda, akā no nā kini PET non-crystalline (APET), crystalline PET (CPET) a me nā saucers. I nā makahiki ʻelima i hala iho nei, ua hoʻohana ʻia ka PET a me ka copolyester, ma ke ʻano he huahana polymer hou, no nā mea ʻenekinia a me nā mea hoʻopili kūikawā.

ʻO ka hoʻohana pono ʻana o PET i nā mea hoʻopili inu palupalu ma muli o kona paʻakikī a me ka moakāka, ka hiki ke kuhikuhi, ka waiwai waiwai maikaʻi loa a me ka hoʻomohala ʻana o ka ʻenehana hana ʻōmole wikiwiki. Loaʻa i nā kini inu PET nā pono o ke kaumaha māmā, ke kūpaʻa i ka haki ʻana, ka hiki ke hoʻohana hou ʻia a me ka hana ea maikaʻi. ʻO ke kaumaha o kahi ʻōmole inu PET 2-lita i hoʻopiha ʻia he 24% ka emi ma mua o kahi ʻōmole aniani like. ʻO ke kaumaha o ka ʻōmole hakahaka he 1/10 o ka ʻōmole aniani like. Mālama ia i ka hana, ka ikehu a me nā kumukūʻai ma kēlā me kēia loulou mai ka mea hana a i ka mea kūʻai. #Mīkini hana hou PET

Kemika a me nā waiwai

Hana ʻia ka PET no nā ʻōmole inu mai ka terephthalic acid (TPA) i loaʻa ma o ka oxidation o ka paraxylene. Hiki ke hoʻomaʻemaʻe ʻia ka terephthalic acid a i ʻole e hana me ka methanol e hana i ka dimethyl terephthalate (DMT), a i ʻole e oxidized hou ʻia e hana i ka terephthalic acid maʻemaʻe (PTA). ʻO ka mea kumu ʻē aʻe no ka PET ʻo ethane, kahi i hoʻololi ʻia e ka hopena i loko o ka ethylene glycol (EG). ʻO PET kahi polycondensation i hana ʻia e ka hopena polymerization o DMT (a i ʻole PTA) a me EG i ke kūlana hoʻoheheʻe mau, a laila i ke kaʻina hana polymerization paʻa e loaʻa ai nā hua nui a me ke kaumaha molekala hope loa, ka viscosity kūlohelohe. Hoʻolilo ke kaʻina hana solid-state i ka nui o ka ethanol o ka polymer i haʻahaʻa.

Hoʻoheheʻe ʻia ka resin PET kalepa ma kahi o 480F(), akā ʻo ke kiko hoʻoheheʻe o ka PET crystalline kiʻekiʻe ma kahi o 520F(). Loaʻa i ka PET crystallized kuhikuhi ʻia ka ikaika maikaʻi loa. Paʻakikī a me ka transparency, a me ke kūpaʻa i nā waikawa nāwaliwali a me nā kumu a me nā mea hoʻoheheʻe he nui.

Papa kūikawā #ʻōmole pipi

Loaʻa ka PET hoʻoheheʻe ʻia me ka paʻa, ʻōmaʻomaʻo a me ka melemele māmā PET. ʻAʻole pono nā polymers kala i loko o ka reactor i ka recombination e hoʻopilikia maikaʻi ʻole i nā waiwai kino a hoʻomaikaʻi i ke ʻano like o ke kala. Loaʻa nā ʻano resins maʻemaʻe me nā viscosities intrinsic like ʻole. Hoʻopili mālie nā copolymers PET, kahi e hiki ai ke hana i nā ʻōmole soda kiʻekiʻe ma lalo o nā ʻano hana like ʻole. Loaʻa pū kekahi polymer hoʻoheheʻe ʻia me ka pahū. Loaʻa i kēia mea nā pono o ka ikaika hoʻoheheʻe maikaʻi loa a me ka wikiwiki o ka crystallization lohi, a hiki ke hana maʻalahi ʻia ma nā lako extrusion a me ka hoʻoheheʻe ʻana i ka pahū kūpono. Ke hoʻolauna mau ʻia nei a hoʻololi ʻia paha nā ʻano polymers i hoʻoikaika ʻia, flame retardant a me nā polymers kūikawā ʻē aʻe e hoʻokō i nā noi hou. ʻO nā copolyesters PETG kekahi laʻana o nā copolyesters he nui. ʻAʻole e like me ka PCTA i hoʻololi ʻia me ka waikawa, ʻo PETG kahi polymer diol i hoʻololi ʻia i hana ʻia me CHDM diol i hui pū ʻia me TPA (terephthalic acid) a me ethylene glycol. Hiki ke hoʻoheheʻe ʻia a hoʻopuka ʻia paha nā copolymers PETG a mālama mau i ko lākou mau waiwai amorphous, transparent, a aneane ʻole ke kala, ʻoiai ma nā ʻāpana kea nui. He kiʻekiʻe kona ʻoʻoleʻa, paʻakikī a me ka paʻakikī maikaʻi, ʻoiai ma nā mahana haʻahaʻa e mālama pū i ka paʻakikī kūpono. ʻO ka hui pū ʻana o ka transparency, toughness a me ka ikaika heheʻe e hiki ai ke hoʻohana ʻia no ka hoʻoheheʻe ʻana i ka injection, blow molding a me ka extrusion o nā profiles, tubes, films a me nā papa. 

Loaʻa ka PETG ma ke ʻano i hoʻololi ʻole ʻia a i ʻole me nā mea hoʻohui like ʻole, me nā mea hoʻokuʻu, nā masterbatches a me nā mea hoʻololi hopena, no ka hoʻoheheʻe ʻana i ka injection. 

Pono e hoʻomaloʻo ʻia ʻo PETG ma 120 ~ 160F no kahi o 4 ~ 6 mau hola ma mua o ka hoʻoheheʻe ʻia ʻana a i ʻole ka extrusion. Ma nā kaʻina hana ʻelua, ʻo ka mahana heheʻe mai 420F a 510F. Pono e liʻiliʻi ka manawa paʻa o nā lako hana ma nā mahana kiʻekiʻe e pale aku i ka hōʻino nui ʻana. Pono e hoʻokō ʻia ke hoʻoheheʻe ʻana i ka inikini ma ka mīkini inikini, e koi ana i kēlā me kēia nui inikini he 50% a 80% o kona hiki. Hiki ke hoʻopuka ʻia a puhi ʻia ʻo PETG ma nā mahana hoʻoheheʻe ma waena o 400-450F e hana i nā shampoos, nā detergents wai, nā huahana hoʻomaʻemaʻe, nā aila mineral a me nā ʻōmole moakaka no ka hoʻopili ʻana i ka meaʻai. Kū ka mea i nā kūlana FDA a hiki ke hoʻopili me ka meaʻai. Hoʻopuka ʻo Extrusion i kahi ākea o nā ʻano profiles, a me nā paipu, nā kiʻiʻoniʻoni a me nā pepa no ka hoʻopili ʻana, me ka hoʻopili ʻana i nā lako lapaʻau. Hiki ke hoʻomaʻemaʻe ʻia ʻo PETG a me PCTA me ka ethylene oxide a me nā kukuna Y. I ka wā e hoʻohana ʻia ai no ka hoʻoheheʻe ʻana i ka injection, hana pinepine ʻia ʻo PETG ma ka pae mahana hoʻoheheʻe o 450-510F, a ʻo ka mahana o ka ʻōpala ma kahi o 70-130F. ʻO nā hoʻohana o kēia manawa e pili ana i nā uhi mea kani, nā pale mīkini, nā ipu hoʻonani, nā kuhikuhi hāmeʻa lever, nā ʻāpana hōʻike, a me nā mea pāʻani. Hoʻohana nui ʻia ʻo PET i nā ʻōpala inu palupalu. Ua noho ʻo PET ma kahi o 100% o ka mākeke ipu hana hou ʻole ʻia he 2-lita, a ua ʻike nui ʻia nā ʻōmole PET 1.5 lita, 1 lita, 0.5 lita a me nā ʻōmole PET liʻiliʻi. Hoʻohana ʻia ʻo PET i ka meaʻai, ka waina a me nā mea holoi lole. ʻO nā mea inu ʻole i hoʻoheheʻe ʻia a me nā ʻōpala huahana ʻoihana, e manaʻo ʻia e hoʻomau ka ulu ʻana o ke koi no PET. ʻO nā meaʻai i hoʻopili ʻia me ka sinapi, nā huahana gelatin, ka pata pīnati, nā mea ʻono, nā ʻaila kuke, nā cocktails a me nā wai huaʻai i hoʻohuihui ʻia. Nā kala hou, ʻoiai ʻo Wieber PET i ka lāʻau lapaʻau. He mea kaulana nā huaora a me nā mea hoʻomaʻemaʻe i loko o nā ʻōpala. ʻO kekahi o nā noi hou loa a wikiwiki loa no nā ipu PET ʻo ia ka ʻōpala meaʻai a mea inu paha, kahi e pono ai ka hoʻopiha ʻana i nā mahana kiʻekiʻe. Pono e hoʻopili ʻia nā meaʻai he nui, ʻoiai hoʻi nā huaʻai a i ʻole nā ​​meaʻai a mea inu paha me ka nui o nā huaʻai, ma 180F a ʻoi aku paha. Hāʻawi kēia i ka pasteurization (disinfection) o nā huahana a me nā pahu i ka manawa o ka hoʻopiha ʻana. ʻO nā pahu i hoʻonohonoho pinepine ʻia, e like me nā mea inu palupalu a me nā ʻeke ʻōpala mea inu palupalu, e emi a hoʻololi ke ʻano i ka wā e kau ʻia ai nā mahana kiʻekiʻe ma luna o 160T, ma muli o kahi hoʻomaha hoʻomaha koʻikoʻi. Hiki ke kau ʻia ka nui o ke koʻikoʻi ke kīkoʻo ʻia a puhi ʻia ka ipu. Ua hoʻomohala ʻia ka ʻenehana pale wela e hoʻomaikaʻi i ka hana ʻana, i kapa pinepine ʻia ʻo ka ʻenehana "hoʻonohonoho wela". Wahi a ke kaʻina hana kikoʻī, aia kekahi mau kikoʻī loea hana, i hoʻopaʻa inoa nui ʻia, e like me nā ipu i kūpono no ka perfusion ma 190 ~ 195F hiki ke hana ʻia. ʻO nā huahana e pono ai ka hoʻopili ʻana me kēia ʻano e komo pū me ka wai hua maʻemaʻe. Nā mea inu wai kiʻekiʻe, nā kī, kekahi mau mea inu isotonic a me nā mea inu haʻuki, nā mea ʻono, nā wai huaʻai i hoʻohuihui ʻia a me kekahi mau wai mineral. Hoʻohana nui ʻia nā hoʻohana ʻē aʻe no PET i nā uhi extruded a me nā kiʻiʻoniʻoni a me nā pepa extruded. Hoʻohana ʻia ʻo PET ma ke ʻano he mea uhi i extruded no ka ʻōpala pepa pahu hiki ke hoʻomoʻa ʻia, a hiki ke hoʻohana ʻia ʻo crystalline PET (CPET) ma ke ʻano he mea kumu e hana ai i nā pā i loko o nā umu. Hoʻonohonoho pinepine ʻia ka kiʻiʻoniʻoni PET ma ke ʻano he biaxially a hoʻohana ʻia e like me ke kiʻiʻoniʻoni X-ray a me nā kiʻiʻoniʻoni kiʻi ʻē aʻe, ka ʻōpala ʻiʻo a me ka tīhi, ka lipine magnetic, ka insulation uila, nā papa paʻi a me ka ʻōpala ʻōmole. Hoʻohana ʻia ʻo PET ma ke ʻano he mea lipine ʻoihana. Ke hoʻomaka nei nā kiʻiʻoniʻoni a me nā pepa PET amorphous a unoriented e hoʻonui no ka hana ʻana i nā ipu, nā pā, nā huahana hū a me nā kīʻaha inu. Hōʻuluʻulu Manaʻo: ʻO PETG kahi mana i hoʻonui ʻia o PET, me ka ʻoi aku ka maopopo, ka paʻakikī kiʻekiʻe, ka pale ʻana i ka hopena maikaʻi aʻe, a ʻoiaʻiʻo hoʻi, ke kumukūʻai kiʻekiʻe.