Daim Ntawv Thov TPU Ua Tus Flexibilizer

Yuav kom txo tau cov nqi khoom thiab tau txais kev ua tau zoo ntxiv,polyurethane thermoplasticCov elastomers tuaj yeem siv ua cov neeg sawv cev toughening uas feem ntau siv los ua kom ntau yam khoom siv thermoplastic thiab cov roj hmab hloov kho kom tawv.

Vim yogpolyurethaneUa ib qho polymer polar heev, nws tuaj yeem sib xws nrog cov polar resins lossis roj hmab, xws li thaum siv ua ke nrog chlorinated polyethylene (CPE) los tsim cov khoom kho mob; Kev sib xyaw nrog ABS tuaj yeem hloov kev siv cov thermoplastic plastics engineering; Thaum siv ua ke nrog polycarbonate (PC), nws muaj cov khoom xws li roj tsis kam, roj tsis kam, thiab kev cuam tshuam tsis kam, thiab tuaj yeem siv los ua lub cev tsheb; Kev sib xyaw nrog polyester tuaj yeem txhim kho nws cov kev ua tau zoo; Tsis tas li ntawd, nws tuaj yeem sib xws nrog polyvinyl chloride, polyoxymethylene (POM), lossis polyvinylidene chloride; Polyester polyurethane tuaj yeem sib xws nrog 15% roj hmab nitrile lossis 40% roj hmab nitrile / polyvinyl chloride sib xyaw roj hmab; Polyether polyurethane kuj tuaj yeem sib xws nrog 40% roj hmab nitrile / polyvinyl chloride sib xyaw nplaum; Nws kuj tuaj yeem sib xws nrog acrylonitrile styrene (SAN) copolymers; Nws tuaj yeem tsim ib qho interpenetrating network (IPN) qauv nrog reactive polysiloxanes. Feem ntau ntawm cov nplaum sib xyaw saum toj no twb tau tsim tawm lawm.
Nyob rau hauv xyoo tas los no, muaj kev tshawb fawb ntau ntxiv txog kev tawv ntawm POM los ntawmTPUnyob rau hauv Suav teb. Kev sib xyaw ntawm TPU thiab POM tsis yog tsuas yog txhim kho qhov kub thiab txias thiab cov khoom siv kho tshuab ntawm TPU xwb, tab sis kuj ua rau POM tawv dua. Qee cov kws tshawb fawb tau qhia tias hauv kev sim tawg tensile, piv rau POM matrix, POM alloys nrog TPU ntxiv hloov pauv los ntawm kev tawg brittle mus rau ductile tawg. Kev ntxiv ntawm TPU kuj muab POM nrog kev ua tau zoo ntawm lub cim xeeb. Thaj chaw crystalline ntawm POM ua haujlwm ua theem ruaj khov ntawm lub cim xeeb alloy, thaum thaj chaw amorphous ntawm amorphous TPU thiab POM ua haujlwm ua theem rov qab tau. Thaum qhov kub thiab txias teb rov qab yog 165 ℃ thiab lub sijhawm rov qab yog 120 s, tus nqi rov qab ntawm cov hlau ncav cuag ntau dua 95%, thiab cov txiaj ntsig rov qab zoo tshaj plaws.
TPU nyuaj rau sib xws nrog cov khoom siv polymer uas tsis yog polar xws li polyethylene, polypropylene, ethylene propylene roj hmab, butadiene roj hmab, isoprene roj hmab, lossis cov hmoov roj hmab pov tseg, thiab tsis tuaj yeem tsim cov khoom sib xyaw nrog kev ua tau zoo. Yog li ntawd, cov txheej txheem kho qhov chaw xws li plasma, corona discharge, wet chemistry, primer, nplaim taws, lossis cov pa roj reactive feem ntau siv rau qhov kawg. Piv txwv li, cov khoom siv cua Asmeskas thiab cov tuam txhab tshuaj lom neeg tuaj yeem txhim kho qhov modulus khoov, lub zog tensile, thiab hnav tsis kam ntawm ultra-high molecular hnyav polyethylene hmoov zoo nrog qhov hnyav molecular ntawm 3-5 lab tom qab F2 / O2 active gas kho qhov chaw, thiab ntxiv nws rau polyurethane elastomers hauv 10% piv. Ntxiv mus, F2 / O2 active gas kho qhov chaw tuaj yeem siv rau cov fibers luv luv elongated nrog qhov ntev ntawm 6-35mm hais saum toj no, uas tuaj yeem txhim kho qhov tawv thiab tearing toughness ntawm cov khoom sib xyaw.