Ta yaya PTFE ke Haɗin Teflon Babban-Zazzabi Tufafi da ke manne da FiberglassFabric?
PTFE (polytetrafluoroethylene) yana da ƙarancin ƙasa da ƙasa wanda aka sani da 'marasa sanda' kayan abu. Don haka, ba zai iya zama kai tsaye ta hanyar sinadarai ba. othmanufacturer-JiangsuAokaiNewMaterial TechnologyCo.,Ltd.,haɗin kai tsakanin abubuwan da aka samu ta hanyar physicalanchoring da injunan haɗakarwa, haɓakawa ta hanyar sinadarai na farko na magani ko zafi-meltadhesion hade yana tasiri.
Takamaiman hanyoyin haɗin gwiwaTflon-zazzabi tufafi musamman sun haɗa da waɗannan masu zuwa:
1.MechanicalInterlocking(PhysicalBonding) Wannan ita ce mafi mahimmancin kusanci. Fiberglassfabricit ɗin kansa yana ba da rubutu. Lokacin da PTFEemulsion ko tarwatsawa ana yin gyare-gyare ko shafe kan ginin fiberglassfabric, PTFE shiga cikin gapsan tsaka-tsakin tsaka-tsakin fibers.Bayan yin buguwa da zafi mai zafi. intering (kimanin 360-400 ° C), PTFE barbashi na narkewa ya ci gaba da fim, da ƙarfi da ƙarfi da fiber daɗaɗɗen ƙirƙira 'anchorhooks.' Duk da haka, dogara ga wannan tsarin yana haifar da iyakancewar haɗin gwiwa, kuma dole ne a buƙaci ƙarin kayan aiki.
2.SilaneCouplingAgentPreatment(ChemicalBridging)
Wannan shi ne mafi mahimmancin tsari don duka PTFEfiberglassfabrics masu inganci. Fuskar fiberglassfabrici an fara fara magani tare da asilanecouplingagent (suchasaminosilane,epoxysilane, da sauransu):
Oneendofthesilane (kungiyar siloxy), afterhydrolysis, na iya haɗin gwiwa tare da ƙungiyoyin hydroxyl (-OH) akan fuskar gilashin fibers;
Hakanan, ƙungiyoyi masu aiki na kwayoyin halitta, suna iya ƙetare-hanyoyin haɗin gwiwa tare da abubuwan haɗin gwiwa tare da abubuwan da aka haɗa da su tare da abubuwan da suka dace da abubuwan da suka faru a ƙarƙashin mulkin mallaka ko sutura.
3.ChemicalPrimerTransitionLayer
Sakamako kai tsaye PTFE sakamakon rashin daidaituwa bayan tsaka-tsaki, soadedicated na farko an fara fara amfani da ginin fiberglassfabric. Wannan firam ɗin yana ƙunshe da:
Adhesiveresins: Suchaspolyamide-imide (PAI), polyphenylenesulfide (PPS), polyethersulfone (PES), ko polytheretherketone (PEEK), wanda ke da kyau wetting kuma mai ƙarfi adhesiontoglassfibers, kuma yana iya jure yanayin zafi mai zuwa PTFE.
PTFEmicrowder: Don tabbatar da cewa farkon da na ƙarshePTFE mai kunnawa zai iya haɗuwa tare.
Wannan firamare yana samun haɗin gwiwar sinadarai da haɗin kai na jiki tare da haɗin gwiwar-wakilin-maganin fiberglassfabric, samar da juzu'i mai jujjuyawa. Mai kunnawa na PTFE yana haɓaka tare da PTFE abubuwan da ke cikin abubuwan da suka haɗa da haɓakawa, tare da kai tsaye suna samun ƙarfi mai ƙarfi.
4.Hot-MeltAdhesiveFilmLamination(LaminationMethod) Wannan hanyar, mai aiki da JiangsuAokaiNewMaterial TechnologyCo., Ltd., ana amfani da shi zuwa haɗin da aka riga aka kafa, thickPTFEfilmstofiberglassfabric.Saboda PTFEhasanextremelyhighmeltviscosity(kimanin) aly10⊃1;⁰–10⊃1;⊃2;Pa·s),yana kwarara sau bakwai lokacin da zafi ke sama da wurin narkewa,sodirecthot-pressbonding ba zai yiwu ba.Amelt-processable'zafi-meltadhesive' dole ne a yi amfani da shi, yawanci: FEP (fluorinatedthylenepropylene) ko PFA (perfluoroalkoxy) fina-finai , wanda ke da maki mai narkewa fiye da PTFE (kimanin 260-310 ° C). msurface.Cikin aiwatarwa,FEP/PFAfilm da aka sanya tsakanin PTFEfilmand da fiberglassfabric,mai zafi da matsi,da bayan sanyi,da ƙarfi ba su da tsari.
5.GradientTructure viaMultiple impregnation and Sintering Cycles
Yawan zafin jiki da yawa da ke ɗauke da beltsandarchitectural membranematerials suna haifar da tsarin aiwatarwa da yawa-tsari: Farko na yin amfani da PTFE watsawa wanda ke ɗauke da ɗawainiya da haɗin gwiwa, yana ba da izinin shigar da firamare a cikin fiberbundles. Bayan gamawa, da yawa masu biyo baya tare da tsantsar PTFEemulsion da nasarar matakai na aiwatarwa, wanda ya haifar da haɓaka mafi girma na PTFE akan saman. Wannan yana haifar da haɗe-haɗe-haɗe-haɗe-haɗe-haɗe daga ginin fiberglassfabric zuwa tsantsar PTFE, tare da ƙarancin damuwa na ciki da ƙarfi mai ƙarfi.
Kammalawa
Taƙaice, haɗin gwiwa tsakanin PTFEcoating da fiberglassfabricinTeflon high-zazzabi tufafin ba tare da yin amfani da shi daidai ba'gluing' -itisacomplex Plingagents da firamare samun nasarar sinadarai hadewa da canzawa, da kuma ta hanyar high-zazzabi mai shiga tsakani don kammala jigon-haɗe-haɗe na masu shirya fina-finai. IfonlypurePTFE an rufa masa kai tsaye, gabaɗayan za a bare tare da hawaye.
