1.resin holoholonahoʻolauna
ʻO ka inoa kemika PET Polyethylene terephthalate, ʻike ʻia hoʻi he polyester, ʻano hoʻohālike kemika COC6H4COOCH2CH2O.Ua hoʻomākaukau ʻia ʻo Dihydroxyethyl terephthalate e ka transesterification o dimethyl terephthalate me ka ethylene glycol a i ʻole esterification o terephthalate me ka ethylene glycol, a laila ka hopena polycondensation.He polyester saturated crystalline, keʻokeʻo waiu a i ʻole melemele māmā, polymer crystalline nui me ka ʻili a me ka ʻālohilohi.He resin maʻamau i ke ola a hiki ke hoʻokaʻawale ʻia i APET, RPET a me PETG.

He waiu keʻokeʻo a i ʻole melemele ʻōmaʻomaʻo ʻo PET, polymer crystalline kiʻekiʻe me ka ʻili ʻālohilohi.Loaʻa iā ia nā waiwai kino a me nā mechanical maikaʻi i kahi ākea ākea, ka mahana hoʻohana lōʻihi a hiki i 120 ℃, insulation uila maikaʻi loa, ʻoiai ma ke kiʻekiʻe kiʻekiʻe a me ke kiʻekiʻe kiʻekiʻe, ʻoi aku ka maikaʻi o kāna mau mea uila, akā maikaʻi ʻole ka pale ʻana o ka corona, ke kūpaʻa creep, ʻO ke kūpaʻa luhi, ke kūpaʻa friction, ke kūpaʻa dimensional maikaʻi loa.He paʻa ester ka PET, e hana ʻia ka decomposition ma lalo o ka hana o ka waikawa ikaika, alkali ikaika a me ka mahu wai, ke kū'ē i nā mea hoʻoheheʻe organik, maikaʻi ke kū ʻana i ka wā.

2. mau waiwai resin
He kūpaʻa maikaʻi ʻo PET, kūpaʻa luhi, kūpaʻa friction a me ke kūpaʻa dimensional, ʻaʻahu liʻiliʻi a me ka paʻakikī kiʻekiʻe, a loaʻa iā ia ka paʻakikī nui loa i ka thermoplastics: maikaʻi ka hana insulation uila, ka hopena liʻiliʻi e ka mahana, akā maikaʻi ʻole ka pale corona.ʻAʻole ʻawaʻawa, kūpaʻa i ka wā, kūpaʻa maikaʻi i nā kemika, haʻahaʻa ka wai absorption, kūʻē i nā ʻakika nāwaliwali a me nā mea hoʻoheheʻe organik, akā ʻaʻole ka hoʻopaʻa ʻana i ka wai wela, ʻaʻole kūpaʻa alkali.

PET resinHe kiʻekiʻe aniani hoʻololi wela, lohi crystallization rate, lōʻihi pōʻaiapili pōʻaiapuni, lōʻihi pōʻaiapili shrinkage, nui molding shrinkage, ilihune dimensional paʻa, brittle crystallization kuʻi, haʻahaʻa wela kū'ē.

Ma o ka hoʻomaikaʻi ʻana i nā mea nucleating agents a me nā crystallizing agents a me ke aniani fiber reinforcement, ua loaʻa i ka PET nā hiʻohiʻona aʻe me nā waiwai o PBT.
1. ʻO ka wela wela wela a me ka mahana hoʻohana lōʻihi ka mea kiʻekiʻe loa i nā plastics general engineering thermoplastic.
2. Ma muli o ke kūpaʻa wela kiʻekiʻe, ua hoʻopili ʻia ka PET i hoʻonui ʻia no 10S i ka ʻauʻau solder ma 250 ° C, kokoke me ka ʻole o ka deformation a i ʻole discoloration, i kūpono loa no ka hoʻomākaukau ʻana i nā ʻāpana uila a me nā ʻāpana uila no ka hoʻoheheʻe ʻana.
3. ʻO 200MPa ka ikaika kulou, ʻo ka modulus elastic he 4000MPa, ʻoi aku ka maikaʻi o ke kūpaʻa ʻana a me ka luhi, kiʻekiʻe ka paʻakikī o ka ʻili, a ua like nā ʻano mechanical me nā plastic thermosetting.
4. No ka mea, ʻo ke kumukūʻai o ka ethylene glycol i hoʻohana ʻia i ka hana ʻana i ka PET ua aneane ka hapalua o ka butanediol i hoʻohana ʻia i ka hana ʻana o PBT, ʻo ka resin PET a me ka PET hoʻoikaika ʻia ke kumu kūʻai haʻahaʻa loa ma waena o nā plastics engineering a loaʻa kahi hana kiʻekiʻe.

No ka hoʻomaikaʻi ʻana i nā waiwai PET, hiki ke hoʻohui ʻia ʻo PET me PC, elastomer, PBT, papa PS, ABS, PA.
Hoʻohana nui ʻia ʻo PET (enhanced PET) e ka injection molding, a me nā ʻano hana ʻē aʻe e pili ana i ka extrusion, blow molding, coating and welding, sealing, machining, vacuum coating a me nā ʻano hana hana lua.E maloʻo loa ma mua o ka hana ʻana.

Hoʻomākaukau ʻia ka polyethylene terephthalate e ka transesterification o dimethyl terephthalate me ka ethylene glycol a i ʻole esterification o terephthalate me ka ethylene glycol, a laila ka hopena polycondensation.He crystalline saturated polyester, ka awelika molecular kaumaha (2-3) × 104, ka lakio o ka awelika kaumaha i ka helu awelika kaumaha molekala he 1.5-1.8.

Ke aniani hoʻololi wela 80 ℃, Martin pale wela 80 ℃, wela wela deformation 98 ℃(1.82MPa), decomposition wela 353 ℃.Loaʻa iā ia nā waiwai mechanical maikaʻi loa.Kiʻekiʻe rigidity.Kiʻekiʻe paʻakikī, liʻiliʻi wai absorption, maikaʻi dimensional paʻa.ʻO ka paʻakikī maikaʻi, ke kū'ē i ka hopena, ke kū'ē'ē, ke kū'ēʻana.ʻO ke kūpaʻa kemika maikaʻi, hiki ke hoʻoheheʻe ʻia i ka cresol, concentrated sulfuric acid, nitrobenzene, trichloroacetic acid, chlorophenol, insoluble in methanol, ethanol, acetone, alkane.Hana wela -100 ~ 120 ℃.Ka ikaika kulou 148-310MPa
ʻO ka hoʻomoe wai 0.06%-0.129%
Ka ikaika hopena 66.1-128J / m
Rockwell paakiki M 90-95
Elongation 1.8%-2.7%

3. ʻenehana hana
Hiki i ka hana PET ke hoʻoheheʻe i ka injection, extrusion, blow molding, coating, bonding, machining, electroplating, vacuum gold plating, paʻi.ʻO kēia ka mea nui e hoʻolauna i ʻelua ʻano.
1. Injection pae ① wela hoʻonohonoho: nozzle: 280 ~ 295 ℃, mua 270 ~ 275 ℃, waena forging 265 ~ 275 ℃, ma hope o 250-270 ℃;ʻO ka māmā holo 50 ~ 100rpm, ka mahana wela 30 ~ 85 ℃, 70 ℃ ka hoʻoheheʻe amorphous, ke kaomi hope 5-15KG.② Ka ho'āʻo dehumidification mea maloʻo, mea paipu wela 240 ~ 280 ℃, injection pressure 500 ~ 1400 ℃, injection molding wela 260 ~ 280 ℃, maloʻo wela 120 ~ 140 ℃, lawe 2 ~ 5 hola.
2. Ma ke kahua kiʻiʻoniʻoni, ʻoki ʻia ka resin PET a maloʻo mua e pale i ka hydrolysis, a laila hoʻokuʻu ʻia ka pepa mānoanoa amorphous i loko o ka extruder ma 280 ° C ma o ka T-mold, a ua kinai ʻia ka pahu hoʻoluʻu a i ʻole ka coolant. e mālama iā ia i loko o kahi ʻano amorphous no ka tensile orientation.Hoʻopili ʻia ka pepa mānoanoa e ka tenter e hana i kahi kiʻiʻoniʻoni PET.

ʻO ka lōʻihi lōʻihi e hoʻomaʻamaʻa i ka pepa mānoanoa i 86 ~ 87 ℃, a ma kēia mahana, e hoʻolōʻihi i 3 mau manawa ma ke ala hoʻonui o ka mokulele pepa mānoanoa, i hiki ai i kāna ʻano ke hoʻomaikaʻi i ke kiʻekiʻe o ka crystallization a hiki i kahi mahana kiʻekiʻe: ka transverse preheating wela o 98 ~ 100 ℃, ka tensile wela o 100 ~ 120 ℃, ka tensile lākiō o 2.5 ~ 4.0, a me ka thermal hoʻonohonoho wela o 230 ~ 240 ℃.ʻO ke kiʻiʻoniʻoni ma hope o ka hoʻolōʻihi ʻana a me ka hoʻopololei ʻana e pono ai ke ʻano wela e hoʻopau i ka deformation kiʻiʻoniʻoni i hana ʻia e ka hoʻolōʻihi ʻana a hana i kahi kiʻiʻoniʻoni me ke kūpaʻa wela maikaʻi.