1.inyamanswaIntangiriro
PET izina ryimiti Polyethylene terephthalate, izwi kandi nka polyester, imiti yimiti COC6H4COOCH2CH2O.Dihydroxyethyl terephthalate yateguwe no guhinduranya transetifike ya dimethyl terephthalate hamwe na Ethylene glycol cyangwa esterifike ya terephthalate hamwe na glycol ya Ethylene, hanyuma reaction ya polycondensation.Ni kristaline yuzuye polyester, amata yera cyangwa umuhondo werurutse, polymer cyane ya kirisiti ifite ubuso bworoshye kandi bwuzuye.Nibisanzwe mubuzima kandi birashobora kugabanywamo APET, RPET na PETG.

PET ni amata yera cyangwa yumuhondo yoroheje, polymer ya kirisiti cyane ifite ubuso bworoshye, burabagirana.Ifite imiterere myiza yumubiri nubukanishi mubushuhe bugari, gukoresha igihe kirekire gukoresha ubushyuhe bugera kuri 120 ℃, kubika amashanyarazi meza, ndetse no mubushyuhe bwo hejuru ndetse ninshuro nyinshi, ibikoresho byamashanyarazi biracyari byiza, ariko birwanya corona birwanya, birwanya kunyerera, kurwanya umunaniro, kurwanya ubukana, guhagarara neza ni byiza cyane.PET ifitanye isano ya ester, kubora bizabaho bitewe na acide ikomeye, alkali ikomeye hamwe namazi yo mumazi, kurwanya imiti kama, guhangana nikirere cyiza.

2.resin
PET ifite imbaraga zo guhangana n’ibikurura, kurwanya umunaniro, kurwanya ubukana no guhagarara neza, kwambara gake no gukomera cyane, kandi ifite ubukana bunini muri thermoplastique: imikorere myiza y’amashanyarazi, imbaraga nke ziterwa nubushyuhe, ariko kurwanya corona nabi.Ntabwo ari uburozi, kurwanya ikirere, guhagarara neza kurwanya imiti, kwinjiza amazi make, kurwanya acide nkeya hamwe n’umuti ukomoka ku buhinzi, ariko ntibishobora kwibiza amazi, ntabwo birwanya alkali.

PET resinifite ubushyuhe bwo hejuru bwikirahure, umuvuduko muke wa kristu, umuvuduko muremure, uruziga rurerure, kugabanuka kwinshi, kugabanuka gukabije, kugabanuka gukabije, kugabanuka kwinshi.

Binyuze mu kunoza ibintu bya nucleating agent hamwe na kristalisitiya hamwe no gushimangira fibre fibre, PET ifite ibimenyetso bikurikira byiyongera kumiterere ya PBT.
1. Ubushyuhe bwo guhindura ubushyuhe hamwe nubushyuhe bwigihe kirekire bwo gukoresha nubushyuhe bwo hejuru muri plastiki rusange yubushakashatsi.
2. Kubera ubushyuhe bwinshi, PET yongerewe imbaraga yatewe inda ya 10S mu bwogero bw’abagurisha kuri 250 ° C, hafi nta guhindagurika cyangwa guhindura ibara, bikwiriye cyane cyane gutegura ibice bya elegitoroniki n’amashanyarazi byo gusudira.
3. Imbaraga zunama ni 200MPa, modulike ya elastique ni 4000MPa, kurwanya creep hamwe numunaniro nabyo nibyiza cyane, ubukana bwubuso buri hejuru, kandi imiterere yubukanishi isa na plastike ya termosetting.
4. Kubera ko igiciro cya Ethylene glycol ikoreshwa mugukora PET hafi ya kimwe cya kabiri cya butanediol ikoreshwa mugukora PBT, PET resin hamwe na PET ishimangirwa nigiciro gito muri plastiki yubuhanga kandi gifite imikorere ihenze.

Kunoza imitungo ya PET, PET irashobora kuvangwa na PC, elastomer, PBT, PS icyiciro, ABS, PA.
PET (yongerewe PET) itunganywa cyane cyane no guterwa inshinge, kandi ubundi buryo burimo gusohora, gushushanya, gusiga no gusudira, gufunga, gutunganya, gutwika vacuum nubundi buryo bwo gutunganya kabiri.Kuma neza mbere yo gushiraho.

Polyethylene terephthalate itegurwa na transesterifike ya dimethyl terephthalate hamwe na Ethylene glycol cyangwa esterification ya terephthalate hamwe na Ethylene glycol, hanyuma reaction ya polycondensation.Ni kristaline yuzuye polyester, impuzandengo ya molekuline (2-3) × 104, ikigereranyo cyibiro ugereranije numubare ugereranije uburemere bwa molekile ni 1.5-1.8.

Ubushyuhe bwikirahure 80 ℃, Martin irwanya ubushyuhe 80 ℃, ubushyuhe bwo guhindura ubushyuhe 98 ℃ (1.82MPa), ubushyuhe bwangirika 353 ℃.Ifite imiterere yubukanishi.Gukomera cyane.Gukomera kwinshi, kwinjiza amazi mato, guhagarara neza.Gukomera kwiza, kurwanya ingaruka, kurwanya ubukana, kurwanya kunyerera.Kurwanya imiti myiza, gushonga muri cresol, acide sulfurike yibanze, nitrobenzene, aside trichloroacetic, chlorophenol, idashonga muri methanol, Ethanol, acetone, alkane.Gukoresha ubushyuhe -100 ~ 120 ℃.Imbaraga zunama 148-310MPa
Kwinjiza amazi 0.06% -0.129%
Imbaraga zingaruka 66.1-128J / m
Gukomera kwa Rockwell M 90-95
Kurambura 1.8% -2.7%

3. tekinoroji yo gutunganya
Gutunganya PET birashobora kuba inshinge, gushiramo, guhumeka, gutwikira, guhuza, gutunganya, amashanyarazi, gushiramo zahabu zahabu, gucapa.Ibikurikira byerekana ubwoko bubiri.
1. Gutera inshinge setting gushiraho ubushyuhe: nozzle: 280 ~ 295 ℃, imbere 270 ~ 275 ℃, hagati yo guhimba 265 ~ 275 ℃, nyuma ya 250-270 ℃;Umuvuduko wihuta 50 ~ 100rpm, ubushyuhe bwubushyuhe 30 ~ 85 ℃, ifu ya amorphous ni 70 ℃, umuvuduko winyuma 5-15KG.Ial Ikigeragezo cya dehumidification yumye, ubushyuhe bwibikoresho 240 ~ 280 ℃, umuvuduko watewe 500 ~ 1400 ℃, ubushyuhe bwo gutera inshinge 260 ~ 280 ℃, ubushyuhe bwumye 120 ~ 140 ℃, fata amasaha 2 ~ 5.
2. Mubyiciro bya firime, PET resin irakata hanyuma ikuma mbere yo gukama kugirango irinde hydrolysis, hanyuma urupapuro rwinshi rwa amorphous rusohoka muri extruder kuri 280 ° C binyuze muri T-mold, hanyuma ingoma ikonjesha cyangwa coolant irazimya. komeza muburyo bwa amorphous kugirango yerekane tensile.Urupapuro rwijimye noneho rufite ibyerekezo byombi kuramburwa nihema kugirango bikore firime PET.

Kurambura birebire ni ugushushya urupapuro rwimbitse kugeza kuri 86 ~ 87 and, kandi kuri ubu bushyuhe, kurambura inshuro zigera kuri 3 ugana icyerekezo cyo kwagura indege yuzuye umubyimba, kugirango icyerekezo cyacyo gishobora kuzamura urwego rwa kristu kugirango ugere ku bushyuhe bwo hejuru: the ubushyuhe bwo guhinduranya ubushyuhe bwa 98 ~ 100 ℃, ubushyuhe bwa 100 ~ 120 ℃, igipimo cya tensile ya 2.5 ~ 4.0, hamwe nubushyuhe bwo gushyushya ubushyuhe bwa 230 ~ 240 ℃.Filime nyuma yo kurambura guhagaritse no gutambuka nayo igomba kuba ifite ubushyuhe kugirango ikureho ihindagurika rya firime iterwa no kurambura no gukora firime ifite ubushyuhe bwiza.