Canje-canje a cikin Tsarin Crystalline na PTFE Yayin Sintering na PTFE High-Temperature Cloth

Jiangsu Aokai New Materials, ƙwararren masana'anta na PTFE high-zazzabi zane, elaborates a kan juyin halitta na PTFE crystalline tsarin a cikin sintering tsari na PTFE high-zazzabi zane.

I. Rushewar Asalin Tsarin Crystalline

1. PTFE crystalline ilimin halittar jiki kafin sintering

Kafin sintering, PTFE ya wanzu a matsayin tarwatsa emulsion barbashi a haɗe zuwa fiberglass masana'anta. Kowane barbashi yana ƙunshe da sarka mai naɗe-haɗe da lu'ulu'u tare da ƴan ƙanana, tsararrun microcrystals.

2. Canjin tsarin a lokacin dumama don sintering

Da zarar zafin jiki ya tashi sama da wurin narkewa (~ 327 ° C), duk lu'ulu'u sun narke sosai. Maɗaukakin sarƙoƙi na ƙwayoyin cuta suna buɗewa kuma suna wargajewa, suna rikiɗa su zama narke amorphous. Iyakokin barbashi na asali sun ɓace yayin da barbashi ke haɗawa zuwa wani ci gaba na narkakkar lokaci, gaba ɗaya suna wargaza tsarin ƙwanƙwasa na farko.

II. Recrystallization Lokacin sanyaya

1. Samuwar sifofin spherulitic

Bayan sanyaya daga narkakkar jihar, PTFE cikin sauri ta sake yin recrystallizes don samar da spherulites wanda ya ƙunshi radially daidaitacce mai naɗe-haɗe-sarkar lamellae wanda ke fitowa waje daga wuraren tsakiya na tsakiya. Wadannan spherulites masu shiga tsakani suna gina matrix crystalline mai ci gaba, suna maye gurbin ainihin tsarin barbashi.

2. Bambanci a cikin crystallinity na ƙarshe

PTFE yana da tsattsauran ra'ayi, sarƙoƙi na yau da kullun na ƙwayoyin cuta, suna isar da ƙimar ƙira da sauri ko da ƙarƙashin ingantacciyar sanyaya. Ƙarshe crystallinity gabaɗaya jeri daga 50% zuwa 70%, kadan kadan fiye da na asali emulsion barbashi.

III. Juyin Halitta na Crystalline Parameters da Crystal Forms

1. Riƙe na barga crystal lokaci

Bayan sanyaya zuwa dakin zafin jiki, PTFE yana kula da tsayayyen tsarin lu'ulu'u hexagonal (ɗakin-zazzabi mai ɗaki mai ɗaki), mai kama da sigar crystal ɗin sa na farko. Duk sauye-sauyen tsarin suna faruwa cikin girman crystal, kamala da ilimin halittar jiki maimakon na ƙarshe na kristal.

2. Tasirin ƙimar sanyaya akan kamala

Sannun sanyaya yana haifar da mafi girman crystallinity, spherulites mafi girma da kauri, mafi ƙayyadaddun lamellae, yana haifar da samfuran tare da haɓakar tauri da yawa.

quenching mai sauri yana kaiwa zuwa ƙananan crystallinity, mafi kyau, ƙarancin spherulites, da ingantattun sassauƙa da ƙarancin gaskiya na kayan da aka gama. Slow sanyaya misali ne ga PTFE high-zazzabi zane don saduwa da inji ƙarfi bukatun.

IV. Tasirin Crystallization Interface akan Fiberglass da Mahimmancin Gabaɗaya

1. Abubuwan da ke faruwa na transcrystallization

Lokacin da PTFE narke yana sanyaya akan filayen fiberglass, wuraren daɗaɗɗen nucleation akan filayen fiber suna haifar da transcrystallization: Layer crystal Layer yana tsiro daidai da axis fiber, daban-daban da yanayin halittar spherulite a cikin babban shafi.

2. Gradient tsarin daga fiber dubawa zuwa shafi girma

Karkashin tasirin fiberglass, tsarin crystalline na PTFE yana samar da canjin gradient: Layer transcrystalline kusa da zaruruwa a hankali yana canzawa zuwa tsarin spherulitic a cikin matrix na ciki.

3. Ƙaddamar da tasiri na tsarin canji akan aikin zane na PTFE

Sintering yana canza lu'ulu'u na ƙwanƙwasa-sarkar PTFE: suna fuskantar narkewa da rugujewar tsari, sa'an nan kuma su sake komawa cikin ci gaba, spherulites masu yawa (tare da yadudduka transcrystalline). Wannan yana jujjuya ɓangarorin ɓoyayyen foda a cikin fim ɗin ci gaba mai inganci, wanda shine muhimmin abin da ake buƙata don rufin don sadar da ingantaccen aikin da ya haɗa da juriya mai zafi, ƙarancin gogayya, kadarar da ba ta da ƙarfi da juriya na lalata sinadarai.

Abubuwan fasaha na sama sun samar da su Jiangsu Aokai New Materials Technology Co., Ltd.

Idan kuna son samun cikakkun bayanai dalla-dalla, yanayin aikace-aikacen da keɓaɓɓen mafita don cikakken fayil ɗin samfuranmu gami da PTFE babban zane mai zafin jiki, PTFE babban zafin jiki m tef, PTFE high-zazzabi raga bel, m zafi latsa bel, guda-gefe PTFE masana'anta, high-zazzabi-resistant fiber lamba mana, da zafi mai jure lamba bel da zafi mai zafi da ke ƙasa.

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