Liphetoho ho PTFE Crystalline Structure Nakong ea Sintering ea PTFE High-Temperature Lesela

Jiangsu Aokai New Materials, moetsi ea hloahloa oa lesela la mocheso o phahameng oa PTFE, o qaqisa phetoho ea sebopeho sa kristale sa PTFE ho pholletsa le ts'ebetso ea sintering ea lesela la mocheso o phahameng oa PTFE.

I. Tšenyo ea Sebopeho sa Pele sa Crystalline

1. PTFE crystalline morpholoji pele sintering

Pele ho sintering, PTFE e teng e le likaroloana tse qhalakaneng tsa emulsion tse khomaretsoeng lesela la fiberglass. Karohano e 'ngoe le e' ngoe e na le lamellae e menahaneng haholo ea kristale e nang le likristale tse nyane tse hlophisitsoeng hantle.

2. Phetoho ea sebopeho nakong ea ho futhumatsa bakeng sa sintering

Hang ha mocheso o phahama ka holim'a ntlha ea ho qhibiliha (~ 327 ° C), likristale tsohle li qhibiliha ka ho feletseng. Liketane tse phuthetsoeng tsa limolek'hule lia phutholoha ebe lia ikarola, li fetoha ho qhibiliha ha amorphous. Meeli ea mantlha ea likaroloana e nyamela ha likaroloana li hokahana mohatong o tsoelang pele oa ho qhibiliha, ho senya ka botlalo sebopeho sa kristale sa granular.

II. Recrystallization Nakong ea Pholiso

1. Ho thehoa ha mehaho ea spherulitic

Ha e pholile ho tloha sebakeng se entsoeng ka ho qhibilihisoa, PTFE e tsosolosa ka potlako ho etsa li-spherulites tse entsoeng ka li-lamellae tse pota-potiloeng ka mahlaseli a tsoang ka ntle ho tloha libakeng tse bohareng tsa nucleation. Li-spherulite tsena tse kenang lipakeng li haha ​​​​matrix ea kristale e tsoelang pele, e nkelang sebaka sa sebopeho sa mantlha se pakiloeng.

2. Phapang ka crystallinity ho qetela

PTFE e na le liketane tse thata, tse tloaelehileng haholo tsa limolek'hule, e fana ka litefiso tse potlakileng haholo tsa kristale le tlas'a pholile e potlakileng. Crystallinity ea ho qetela ka kakaretso e tloha ho 50% ho isa ho 70%, e tlase hanyane ho feta ea likaroloana tsa pele tsa emulsion.

III. Phetoho ea Mekhahlelo ea Crystalline le Liforomo tsa Crystal

1. Ho boloka karolo e tsitsitseng ea kristale

Ka mor'a ho pholile ho ea mocheso oa kamore, PTFE e boloka mokhoa o tsitsitseng oa kristale oa hexagonal (kamore-mocheso oa hexagonal phase), e ts'oanang le sebopeho sa kristale sa pele ho sintering. Liphetoho tsohle tsa sebopeho li etsahala ka boholo ba kristale, phetheho le morphology ho fapana le karolo ea ho qetela ea kristale.

2. Tšusumetso ea sekhahla sa ho pholisa ho phetheho ea kristale

· Ho pholisa butle ho fana ka kristale e phahameng, li-spherulite tse kholoanyane le li-lamellae tse teteaneng, tse hlalositsoeng hantle, tse hlahisang lihlahisoa tse nang le boima bo phahameng le ho teteana.

Ho tima ka potlako ho lebisa ho kristale e batlang e le tlase, e ntle, li-spherulite tse sa phethahalang, le ho feto-fetoha ha maemo le ho pepeseha ha lintho tse felileng. Ho pholisa butle ke ntho e tloaelehileng bakeng sa lesela la mocheso o phahameng oa PTFE ho fihlela litlhoko tsa matla a mochini.

IV. Interfacial Crystallization Effect ho Fiberglass le Bohlokoa ka Kakaretso

1. Ketsahalo ea Transcrystallization

Ha PTFE e qhibiliha e pholile holim'a fiberglass, libaka tse teteaneng tsa nucleation holim'a fiber li etsa hore ho be le transcrystallization: lesela la kristale la columnar le ntse le hōla ka tsela e fapaneng ho ea ho fiber axis, e fapaneng ka ho hlaka le morphology ea spherulite ka har'a seaparo se seholo.

2. Sebopeho sa gradient ho tloha ho sebopeho sa fiber ho ea ho bongata ba ho roala

Tlas'a tšusumetso ea fiberglass, sebopeho sa crystalline sa PTFE se etsa phetoho ea gradient: lera le pota-potileng le bapileng le likhoele butle-butle le fetohela ho meaho ea spherulitic ka har'a matrix a ho roala ka hare.

3. Tšusumetso e tiileng ea phetoho ea sebopeho ho ts'ebetso ea lesela la PTFE

Sintering e fetola likristale tsa PTFE tsa granular folded-chain: lia qhibiliha le ho senyeha ha sebopeho, ebe li fetoha li-spherulite tse sa khaotseng, tse teteaneng (tse nang le likarolo tse fapaneng tsa transcrystalline). Sena se fetola likaroloana tsa phofshoana tse hlephileng hore e be filimi e tsitsitseng e tsoelang pele, e leng ntho e hlokahalang bakeng sa ho roala ho fana ka ts'ebetso e felletseng ho kenyelletsa ho hanyetsa mocheso, khohlano e tlase, thepa e sa thupeng le ho hanyetsa ho bola ha lik'hemik'hale.

Lintlha tse ka holimo tsa tekheniki li fanoa ke Jiangsu Aokai New Materials Technology Co., Ltd.

If you wish to obtain detailed specifications, application scenarios and customized solutions for our full product portfolio including PTFE high-temperature cloth, PTFE high-temperature adhesive tape, PTFE high-temperature mesh belt, seamless heat press belt, single-sided PTFE fabric, high-temperature resistant conveyor belt and heat-resistant fiberglass cloth, please contact us via the information below:

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