Si loo yareeyo kharashyada badeecada loona helo waxqabad dheeraad ah,thermoplastic polyurethaneElastomers waxaa loo isticmaali karaa sidii wakiilo adag oo caadi ahaan loo isticmaalo si loo adkeeyo walxaha kala duwan ee thermoplastic iyo kuwa caagga ah ee wax laga beddelay.
Sababo la xiriirapolyurethaneMaadaama ay tahay polymer aad u cidhif ah, waxay la jaan qaadi kartaa resins-ka polar ama cinjirro, sida marka loo isticmaalo iyadoo lala kaashanayo polyethylene chlorine (CPE) si loo soo saaro alaabada caafimaadka; Isku-darka ABS waxay beddeli kartaa isticmaalka balaastikada thermoplastic-ka injineernimada; Marka loo isticmaalo iyadoo lala kaashanayo polycarbonate (PC), waxay leedahay sifooyin sida iska caabbinta saliidda, iska caabbinta shidaalka, iyo iska caabbinta saameynta, waxaana loo isticmaali karaa in lagu sameeyo jirka gaariga; Isku-darka polyester-ka wuxuu hagaajin karaa waxqabadkiisa adkeysiga; Intaa waxaa dheer, waxay si fiican ula jaan qaadi kartaa polyvinyl chloride, polyoxymethylene (POM), ama polyvinylidene chloride; Polyester-ka polyester-ka wuxuu si fiican ula jaan qaadi karaa 15% cinjirka nitrile ama 40% cinjirka nitrile/polyvinyl chloride isku darka; Polyether polyurethane sidoo kale si fiican ayuu ula jaan qaadi karaa 40% koolada isku darka cinjirka nitrile/polyvinyl chloride; Waxay sidoo kale la jaan qaadi kartaa copolymers-ka acrylonitrile (SAN); Waxay samayn kartaa qaab-dhismeed shabakad isku-dhafan (IPN) oo leh polysiloxanes reactive. Inta badan dhejisyada isku dhafan ee kor ku xusan ayaa durba si rasmi ah loo soo saaray.
Sannadihii ugu dambeeyay, waxaa sii kordhayay cilmi-baaris ku saabsan adkeynta POM iyada oo loo marayoTPUShiinaha. Isku darka TPU iyo POM ma aha oo kaliya inay hagaajiso iska caabbinta heerkulka sare iyo sifooyinka farsamada ee TPU, laakiin sidoo kale waxay si weyn u adkeyneysaa POM. Cilmi-baarayaal qaar ayaa muujiyay in tijaabooyinka jabka jilicsanaanta, marka la barbar dhigo matrix-ka POM, walxaha POM ee lagu daro TPU ay maraan kala-guurka jabka jilicsan una gudbaan jabka ductile. Ku darista TPU waxay sidoo kale siisaa POM waxqabadka xusuusta qaabka. Gobolka kristalinta ee POM wuxuu u adeegaa sidii marxaladda go'an ee walxaha xusuusta qaabka, halka gobolka aan qaab-dhismeedka lahayn ee TPU iyo POM uu u adeego sidii marxaladda la celin karo. Marka heerkulka jawaabta soo kabashada uu yahay 165 ℃ waqtiga soo kabashadana uu yahay 120 s, heerka soo kabashada ee walxaha ayaa gaaraya in ka badan 95%, saameynta soo kabashadana waa tan ugu fiican.
TPU way adag tahay in lala jaanqaado walxaha aan polar ahayn sida polyethylene, polypropylene, ethylene propylene rubber, butadiene rubber, isoprene rubber, ama budada caagga qashinka ah, mana soo saari karaan walxo isku dhafan oo leh waxqabad wanaagsan. Sidaa darteed, hababka daaweynta dusha sare sida plasma, dheecaanka corona, kiimikada qoyan, primer, olol, ama gaasaska falcelinta ayaa badanaa loo isticmaalaa kan dambe. Tusaale ahaan, alaabada hawada ee Mareykanka iyo shirkadaha kiimikada waxay si weyn u horumarin karaan modulus-ka qalooca, xoogga jiidista, iyo xirashada iska caabbinta budada polyethylene ee miisaanka molecular-ka aadka u sarreeya oo leh miisaan molecular ah oo ah 3-5 milyan ka dib daaweynta dusha sare ee gaaska firfircoon ee F2/O2, oo lagu daro elastomers-ka polyurethane ee saamiga 10%. Intaa waxaa dheer, daaweynta dusha sare ee gaaska firfircoon ee F2/O2 waxaa lagu dabaqi karaa fiilooyinka gaagaaban ee dhaadheer ee jihada leh oo dhererkoodu yahay 6-35mm kor ku xusan, taas oo hagaajin karta adkaanta iyo adkaanta jeexitaanka ee walxaha isku dhafan.
Waqtiga boostada: Jan-19-2024