1.Gudun dabbobigabatarwa
Sunan sinadarai na PET Polyethylene terephthalate, kuma aka sani da polyester, dabarar sinadarai COC6H4COOCH2CH2O.Dihydroxyethyl terephthalate an shirya ta hanyar transesterification na dimethyl terephthalate tare da ethylene glycol ko esterification na terephthalate tare da ethylene glycol, sa'an nan kuma polycondensation dauki.Yana da polyester cikakken crystalline, fari fari ko rawaya mai haske, polymer crystalline sosai tare da santsi kuma mai sheki.Guduro ne gama gari a rayuwa kuma ana iya raba shi zuwa APET, RPET da PETG.

PET farin madara ne ko rawaya mai haske, polymer crystalline sosai tare da santsi, ƙasa mai sheki.Yana da kyawawan kaddarorin jiki da na inji a cikin kewayon zafin jiki mai faɗi, zazzabi mai amfani na dogon lokaci har zuwa 120 ℃, ingantaccen rufin lantarki, har ma a babban zafin jiki da mitar mita, kaddarorin sa na lantarki har yanzu suna da kyau, amma juriya mara kyau, juriya mai rarrafe, juriya gajiya, juriya juriya, kwanciyar hankali mai girma suna da kyau sosai.PET yana da ester bond, bazuwar zai faru a ƙarƙashin aikin acid mai ƙarfi, alkali mai ƙarfi da tururi na ruwa, juriya ga kaushi mai ƙarfi, juriya mai kyau yanayi.

2. guduro Properties
PET yana da kyakkyawan juriya mai raɗaɗi, juriyar gajiya, juriya juriya da kwanciyar hankali, ƙaramin lalacewa da tauri mai ƙarfi, kuma yana da mafi girman ƙarfi a cikin thermoplastics: kyakkyawan aikin rufin lantarki, ƙarancin tasiri ta zazzabi, amma ƙarancin juriya na corona.Ba mai guba ba, juriya na yanayi, kwanciyar hankali mai kyau akan sinadarai, ƙarancin sha ruwa, juriya ga raunin acid da kaushi mai ƙarfi, amma ba nutsar da ruwa mai zafi ba, ba juriya na alkali ba.

Farashin PETyana da babban gilashin miƙa mulki zafin jiki, jinkirin crystallization kudi, dogon gyare-gyaren sake zagayowar, dogon gyare-gyaren sake zagayowar, manyan gyare-gyaren shrinkage, matalauta girma da kwanciyar hankali, gaggautsa crystallization gyare-gyare, low zafi juriya.

Ta hanyar inganta abubuwan da ke haifar da nucleating da jami'an crystallizing da ƙarfafa fiber gilashi, PET yana da halaye masu zuwa ban da abubuwan PBT.
1. Thermal nakasar zafin jiki da kuma dogon lokacin amfani zafin jiki ne mafi girma a thermoplastic janar injiniya robobi.
2. Saboda babban zafi juriya, da inganta PET ne impregnated ga 10S a solder wanka a 250 ° C, kusan ba tare da nakasawa ko discoloration, wanda shi ne musamman dace da shirye-shiryen na lantarki da lantarki sassa na solder waldi.
3. The lankwasawa ƙarfi ne 200MPa, da na roba modulus ne 4000MPa, da creep juriya da gajiya ne ma da kyau sosai, da surface taurin ne high, da inji Properties ne kama da thermosetting robobi.
4. Tun da farashin ethylene glycol da ake amfani da shi wajen samar da PET ya kusan rabin na butanediol da ake amfani da shi wajen samar da PBT, PET resin da ƙarfafa PET sune mafi ƙasƙanci a tsakanin robobin injiniya kuma suna da babban farashi.

Don haɓaka kaddarorin PET, ana iya haɗa PET tare da PC, elastomer, PBT, PS class, ABS, PA.
PET (ingantattun PET) galibi ana sarrafa su ta hanyar gyare-gyaren allura, kuma sauran hanyoyin sun haɗa da extrusion, gyare-gyaren busa, sutura da walƙiya, rufewa, injina, murfin injin da sauran hanyoyin sarrafawa na sakandare.A bushe sosai kafin kafa.

Polyethylene terephthalate an shirya ta hanyar transesterification na dimethyl terephthalate tare da ethylene glycol ko esterification na terephthalate tare da ethylene glycol, sa'an nan kuma polycondensation dauki.Yana da cikakken polyester crystalline, matsakaicin nauyin kwayoyin halitta (2-3) × 104, rabo daga matsakaicin nauyi zuwa lamba matsakaicin nauyin kwayoyin halitta shine 1.5-1.8.

Gilashin canji zafin jiki 80 ℃, Martin zafi juriya 80 ℃, thermal nakasawa zazzabi 98 ℃ (1.82MPa), bazuwar zazzabi 353 ℃.Yana da kyawawan kaddarorin inji.Babban tsauri.Babban taurin, ƙananan shayar ruwa, kwanciyar hankali mai kyau.Kyakkyawan taurin, juriya mai tasiri, juriya juriya, juriya mai raɗaɗi.Kyakkyawan juriya na sinadarai, mai narkewa a cikin cresol, sulfuric acid mai da hankali, nitrobenzene, trichloroacetic acid, chlorophenol, wanda ba zai iya narkewa a cikin methanol, ethanol, acetone, alkane.Yanayin aiki -100 ~ 120 ℃.Ƙarfin lanƙwasa 148-310MPa
Ruwan sha 0.06% -0.129%
Ƙarfin tasiri 66.1-128J /m
Rockwell taurin M 90-95
Tsawaitawa 1.8% -2.7%

3. fasahar sarrafawa
PET aiki na iya zama allura gyare-gyare, extrusion, busa gyare-gyare, shafi, bonding, machining, electroplating, injin zinariya plating, bugu.Mai zuwa yafi gabatar da nau'i biyu.
1. allura mataki ① zazzabi saitin: bututun ƙarfe: 280 ~ 295 ℃, gaban 270 ~ 275 ℃, tsakiyar ƙirƙira 265 ~ 275 ℃, bayan 250-270 ℃;Dunƙule gudun 50 ~ 100rpm, mold zazzabi 30 ~ 85 ℃, amorphous mold ne 70 ℃, baya matsa lamba 5-15KG.② Gwajin dehumidification na'urar bushewa, abu tube zafin jiki 240 ~ 280 ℃, allura matsa lamba 500 ~ 1400 ℃, allura gyare-gyaren zazzabi 260 ~ 280 ℃, bushewa zafin jiki 120 ~ 140 ℃, kai 2 ~ 5 hours.
2. A cikin fim mataki, da PET guduro ne sliced ​​da pre-bushe don hana hydrolysis, sa'an nan amorphous lokacin farin ciki takardar ne extruded a cikin extruder a 280 ° C ta T-mold, da sanyaya drum ko coolant ne quenched zuwa. Ajiye shi a cikin nau'i na amorphous don daidaitawa mai ƙarfi.Sai tanti mai kauri ta shimfiɗa ta bidirectional don samar da fim ɗin PET.

A tsawo mikewa ne preheat lokacin farin ciki takardar zuwa 86 ~ 87 ℃, kuma a wannan zafin jiki, shimfiɗa game da 3 sau tare da tsawo shugabanci na lokacin farin ciki takardar jirgin sama, sabõda haka, ta fuskantarwa iya inganta mataki na crystallization isa wani mafi girma zazzabi: da transverse preheating zafin jiki na 98 ~ 100 ℃, da tensile zafin jiki na 100 ~ 120 ℃, da tensile rabo na 2.5 ~ 4.0, da thermal saitin zafin jiki na 230 ~ 240 ℃.Fim bayan mikewa a tsaye da a kwance kuma yana buƙatar zama mai siffar zafi don kawar da nakasar fim ɗin da ke haifar da shimfidawa da yin fim tare da kwanciyar hankali mai kyau.