Me yasa Tef ɗin PTFE zai iya riƙe mannewa ba tare da gazawa ba a cikin Mahalli masu zafi?

Tef ɗin PTFE mai zafi mai zafi wanda Jiangsu Aokai New Materials ya samar yana amfani da mannen matsa lamba na silicone, wanda zai iya aiki a tsaye a 250 ° C na dogon lokaci. Dalilai na asali sun ta'allaka ne a cikin abubuwa guda uku masu zuwa:

1. Babban Sarkar Ya ƙunshi Si-O Bonds tare da Matsakaicin Rushewar thermal

Babban sarkar kwayoyin halitta na mannen matsi na silicone a cikin tef mai zafi mai zafi na PTFE yana da tsarin Si O Si O. Ƙarfin haɗin haɗin Si-O yana da kusan 445 kJ/mol, mafi girma fiye da haɗin C-C (kimanin 348 kJ/mol) ko haɗin C-H (kimanin 413 kJ / mol) a cikin polymers na yau da kullum kamar acrylates da rubbers.

A yanayin zafi mai girma, haɗin C-C cikin sauƙi yana haifar da lalata sarkar, yayin da haɗin Si-O yana buƙatar ƙarin ƙarfi mai yawa don fashewa. Sabili da haka, babban sarkar kwayoyin halitta na silicone PSA ya kasance mai ƙarfi a 250 ° C, yana guje wa asarar mannewa da lalacewa ta thermal-oxidative.

2. Chemical Cross-linking Network Hana Tausasawa da Gudu a Babban Zazzabi

Robar silicone wanda ba a haɗa shi ba yana juyewa zuwa ruwa mai ɗanɗano a yanayin zafi mai yawa kuma yana rasa ƙarfin haɗin gwiwa gaba ɗaya. Koyaya, PSA na silicone a cikin tef ɗin PTFE mai zafin jiki yana haɗe ta hanyar haɗin gwiwar peroxide ko ƙari na platinum-catalyzed crosslinking, haɗa sarƙoƙin ƙwayoyin cuta na madaidaiciya zuwa cibiyar sadarwa mai girma uku.

Wannan tsarin da aka haɗe shi yana ba da damar mannewa don kula da ingantaccen hali na roba a 250 ° C ba tare da narkewa ko gudana kamar kayan thermoplastic ba. Ko da ɗan raguwar modul, har yanzu yana da isasshen ƙarfin haɗin gwiwa don tsayayya da bawon.

3. Low Glass Canjin Zazzabi (Tg ~ -120°C)

Silicone PSA a cikin tef ɗin zafi mai zafi na PTFE yana da ƙananan Tg (kimanin -120 ° C), ma'ana sarƙoƙi na kwayoyin halitta suna kasancewa a cikin yanayi mai ƙarfi sosai a cikin kewayon zafin jiki mai faɗi daga -70 ° C zuwa 300 ° C, maimakon yanayin gilashi mai gatsewa.

Don haka, a yanayin zafi mai yawa, mannen Layer ba ya taurare don rasa ikon yin jika kuma ba ya yin laushi zuwa wuce gona da iri. Yana kiyaye madaidaicin modules (ajiya modules G' ≈ 10⁴–10⁶ Pa), wanda shine mafi kyawun taga don mannewa-matsi.

Silicone PSA kanta yana da ƙarancin makamashi mai ƙarfi (kimanin 22 mN / m), yana ba shi damar jika ƙarancin ƙarfi-makamashi kamar PTFE da roba na silicone da kyau har ma a yanayin zafi mai yawa - yana hana debonding lalacewa ta hanyar rashin daidaituwar makamashi.

Jiangsu Aokai New Materials Technology Co., Ltd ne ya samar da bayanin da ke sama.

Don cikakkun sigogi, yanayin aikace-aikacen da keɓaɓɓen mafita na kewayon samfuran mu - gami da PTFE high-zazzabi zane, PTFE high-zazzabi tef, PTFE high-zazzabi raga bel, sumul bel ga laminating inji, guda-gefe PTFE zane, high-zazzabi resistant conveyor bel da high-zazzabi mai lamba mu ta hanyar fiber tufafi.

·  Layin Sabis: Mr. Guo 18944819998 Malam Liu 13705266308

Bin falsafar sabis na ƙwararru da mutunci, an sadaukar da mu don samar muku da mafita ta tsayawa ɗaya da sabis na kulawa!