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Ka whakamahia te muka waihanga – polyester

Ingoa Rauemi: Polyester

Takenga me nga ahuatanga

Ko te muka polyester, e mohiotia ana ko "polyester".He muka waihanga i hangaia ma te miro i te polyester i hangaia mai i te polycondensation o te diacid waro me te diol, he poto mo te muka PET, no te pūhui ngota teitei.I hangaia i te tau 1941, koinei te momo nui rawa atu o te muka waihanga.Ko te painga nui o te muka polyester ko te aukati korukoru me te tiaki ahua he tino pai, me te kaha ake o te kaha me te kaha whakaora.Ko tona mau tonu, he korukoru me te kore e rino, he makawe kore-piri.

Ko te muka polyester (PET) he momo muka waihanga he maha nga mekameka o te mekameka macromolecular e hono ana e te roopu ester ka miro ki te muka polymer.I Haina, ko nga muka kei roto neke atu i te 85% polyethylene terephthalate e kiia ana he polyester mo te poto.He maha nga ingoa taonga o te ao, penei ko Dacron o te United States, Tetoron o Japan, Terlenka o te United Kingdom, Lavsan o te Soviet Union o mua, etc.

No te tau 1894, i hanga e Vorlander nga polyesters he iti te taumaha ngota ngota me te succinyl chloride me te ethylene glycol.I hangaia e Einkorn te polycarbonate i te tau 1898;Carothers synthetic aliphatic polyester: Ko te polyester i whakahiatohia i nga tau tuatahi ko te nuinga o te puhui aliphatic, he iti te taumaha o te ngota ngota me te ira whakarewa, he ngawari ki te memeha i roto i te wai, na reira kaore he uara o te muka pueru.I te tau 1941, i whakahiatotia e Whinfield raua ko Dickson i Peretana te polyethylene terephthalate (PET) mai i te dimethyl terephthalate (DMT) me te ethylene glycol (EG), he waerau ka taea te whakamahi ki te whakaputa i nga muka he tino pai rawa atu ma te miro whakarewa.I roto i te 1953, te United States tuatahi whakaturia he wheketere ki te whakaputa PET muka, pera ki te korero, PET muka ko te momo o te mutunga whakawhanakehia muka i roto i te muka waihanga nui.

Na te whakawhanaketanga o te whakahiato waro, te pūtaiao polymer me te ahumahi, he maha nga momo muka PET whaihua me nga momo ahuatanga kua whakawhanakehia i roto i nga tau tata nei.

Pērā i te muka polybutylene terephthalate (PBT) me te muka polypropylene-terephthalate (PTT) me te elasticity totoro teitei, te muka polyester kakara katoa me te kaha ultra-tiketike me te modulus teitei, me etahi atu : ko te mea e kiia nei ko te "muka polyester" ka kiia ko te te muka polyethylene terephthalate.

Apure Tono

Ko te muka polyester he raupapa o nga taonga pai, penei i te kaha pakaru teitei me te whakanekehanga rapa, te whakaahuru ngawari, te pai o te whakamaarama waiariki, te pai o te wera me te maamaa.Ko te ira whakakoero muka polyester he 255 ℃ ranei, te pāmahana whakawhiti karaihe e pā ana ki 70 ℃, i roto i te whānuitanga o te mutunga-whakamahi tikanga pūmau te āhua, horoi papanga me te kakahu ātete, i roto i te tua, he pai impedance (pērā i te ātete ki te whakarewa organic. , hopi, hopi, otinga hātea, oxidant) me te pai o te aukati waikura, te waikawa ngoikore, te alkali, penei i te pumau, na reira he whanui te whakamahi me te whakamahi ahumahi.Ko te whanaketanga tere o te ahumahi hinu, hoki mo te hanga muka polyester ki te whakarato i te rawa nui, me te iti rawa raw rauemi, ngā ki te matū, mīhini, hangarau mana hiko i roto i nga tau tata te whanaketanga o te hangarau, pērā i te rauemi mata ki te whakaputa, muka hanga. me te mahi miihini ka tere te whakatutuki i te waa poto, te haere tonu, te tere tere me te aunoatanga, ko te muka polyester te tere o te whakawhanaketanga tere, nga momo tino whai hua o te muka waihanga.I te tau 2010, i tae ki te 37.3 miriona taara te hanga muka polyester o te ao, e 74% o te katoa o te hanga muka waihanga o te ao.

Āhuatanga ā-tinana

1) Tae.Ko te polyester i te nuinga o te waa he opalescent me te mercerization.Hei whakaputa hua matte, taapirihia te TiO2 matte i mua i te miro;ki te whakaputa hua parakore ma, taapirihia he kai maaka;ki te whakaputa hiraka tae, tāpirihia te poaka, te waikano ranei ki te rewa miro.

2) Te ahua o te mata me te waahanga whiti.He maeneene te mata o te polyester tikanga, he tata porotaka te wahanga ripeka.Hei tauira, ko te muka me te ahua o te waahanga motuhake, penei i te tapatoru, te ahua Y, te hollow me etahi atu hiraka waahanga motuhake, ka taea te hanga ma te whakamahi i te spinneret ahua motuhake.

3) Kiato.Ina he amorphous te polyester, ko tona kiato he 1.333g/cm3.1.455g/cm3 ka tino tioata.Ko te tikanga, ko te polyester he tioata teitei me te kiato o 1.38 ~ 1.40g / cm3, he rite ki te huruhuru (1.32g / cm3).

4) Reiti hoki te makuku.Ko te houku o te polyester i roto i te ahua paerewa he 0.4%, he iti ake i tera o te kiriaku (1%~2%) me te polyamide (4%).He iti te hygroscopicity o te polyester, no reira ka iti ake te kaha maku, ka taea te horoi te papanga;Engari he kino te ahuatanga o te hiko pateko i te wa e tukatuka ana, e mau ana, he ngoikore te manawa o te papanga me te hygroscopicity.

5) Mahinga wera.Ko te ira ngohe T o te polyester he 230-240 ℃, ko te ira whakarewa Tm he 255-265 ℃, ko te ira pirau T he tata ki te 300 ℃.Ka taea e te polyester te wera i roto i te ahi, te korikori me te rewa hei pirepire, me te paowa pango me te kakara.

6) Atete marama.Ko tōna ātete marama he tuarua anake ki te muka kiriaku.Ko te parenga marama o te dacron e pa ana ki tona hanganga ngota.Ko te Dacron anake he roopu whakauru kaha i roto i te rohe ngaru marama o 315nm, no reira ka ngaro noa tona kaha i te 60% i muri i te 600h o te ra o te ra, he rite ki te miro.

7) Mahi hiko.He ngoikore te kawe o te polyester na te iti o te hygroscopicity, me tona tuturu dielectric i roto i te awhe o -100 ~ + 160 ℃ he 3.0 ~ 3.8, ka waiho hei insulator pai.

Nga Taonga Miihini

1) Te kaha teitei.Ko te kaha maroke ko 4 ~ 7cN / DEX, i te mea ka heke te kaha maku.

2) Elongation āhua, 20%~50%.

3) Kounga teitei.I roto i te momo nui o te muka waihanga, ko te modulus tuatahi o te polyester te teitei, ka taea te tae atu ki te 14 ~ 17GPa, e pai ai te papanga polyester i te rahi, te kore-deformation, te kore-deformation me te roa i roto i te pleating.

4) He pai te manawanui.He tata ki te wūru, ka whakaroahia e te 5%, ka tata katoa te ora i muri i te whakahekenga o te uta.Na reira, ko te parenga korukoru o te papanga polyester he pai ake i era atu papanga muka.

5) Whakamaua te aukati.Ko tana parenga kakahu he tuarua noa iho ki te nylon, he nui atu i era atu muka waihanga, he rite tonu te parenga kakahu.

Pūmautanga matū

Ko te pumau matū o te polyester te nuinga ka whakawhirinaki ki tona hanganga mekameka ngota.He pai te parenga o te polyester ki etahi atu reagents engari mo te ngoikore o te parenga kawakore.

Atete waikawa.He tino pumau a Dacron ki nga waikawa (ina koa nga waikawa waro) ka rumakina ki te wairewa waikawa maata me te hautanga papatipu o te 5% i te 100 ℃.


Wā tuku: Feb-14-2022