Pofuna kuchepetsa ndalama zomwe zimagwiritsidwa ntchito komanso kupeza ntchito yowonjezera,polyurethane thermoplasticMa elastomer angagwiritsidwe ntchito ngati zinthu zomangira zomwe zimagwiritsidwa ntchito kwambiri polimbitsa zipangizo zosiyanasiyana za thermoplastic ndi rabara zosinthidwa.
Chifukwa chapolyurethanePopeza ndi polima wokhuthala kwambiri, imatha kugwirizana ndi ma resins a polar kapena ma rabara, monga momwe imagwiritsidwira ntchito limodzi ndi polyethylene ya chlorinated (CPE) popanga zinthu zachipatala; Kusakaniza ndi ABS kungalowe m'malo mwa kugwiritsa ntchito mapulasitiki a thermoplastic; Ikagwiritsidwa ntchito limodzi ndi polycarbonate (PC), ili ndi zinthu monga kukana mafuta, kukana mafuta, komanso kukana kukhudza, ndipo ingagwiritsidwe ntchito kupanga matupi a magalimoto; Kusakaniza ndi polyester kungathandize kulimbitsa mphamvu zake; Kuphatikiza apo, imatha kugwirizana bwino ndi polyvinyl chloride, polyoxymethylene (POM), kapena polyvinylidene chloride; Polyester polyurethane imatha kugwirizana bwino ndi 15% nitrile rabara kapena 40% nitrile rubber/polyvinyl chloride blend rabara; Polyether polyurethane imatha kugwirizananso bwino ndi 40% nitrile rubber/polyvinyl chloride blend adhesive; Imathanso kugwirizana ndi acrylonitrile styrene (SAN) copolymers; Imatha kupanga kapangidwe ka interpenetrating network (IPN) ndi reactive polysiloxanes. Zambiri mwa zomatira zosakaniza zomwe tatchulazi zapangidwa kale mwalamulo.
M'zaka zaposachedwapa, pakhala kafukufuku wowonjezereka pa kulimbitsa kwa POM ndiTPUku China. Kusakaniza kwa TPU ndi POM sikuti kumangowonjezera kukana kutentha kwambiri komanso mphamvu zamakaniko za TPU, komanso kumalimbitsa kwambiri POM. Ofufuza ena awonetsa kuti mu mayeso opsinjika a tensile fracture, poyerekeza ndi POM matrix, ma POM alloys okhala ndi TPU yowonjezera amadutsa kuchokera ku brittle fracture kupita ku ductile fracture. Kuwonjezera kwa TPU kumapatsanso POM mphamvu yokumbukira mawonekedwe. Dera la crystalline la POM limagwira ntchito ngati gawo lokhazikika la mawonekedwe a alloy, pomwe dera losasinthika la amorphous TPU ndi POM limagwira ntchito ngati gawo losinthika. Pamene kutentha kwa kuchira kuli 165 ℃ ndipo nthawi yochira ndi 120 s, kuchuluka kwa kuchira kwa alloy kumafika pa 95%, ndipo zotsatira zochira zimakhala zabwino kwambiri.
TPU ndi yovuta kugwirizana ndi zinthu zopanda polima monga polyethylene, polypropylene, rabara ya ethylene propylene, rabara ya butadiene, rabara ya isoprene, kapena ufa wa rabara wotayidwa, ndipo sizingapange zinthu zophatikizika bwino. Chifukwa chake, njira zochizira pamwamba monga plasma, corona discharge, wet chemistry, primer, flame, kapena reactive gases nthawi zambiri zimagwiritsidwa ntchito pazomalizazi. Mwachitsanzo, makampani opanga mpweya aku America ndi mankhwala amatha kusintha kwambiri ma modulus opindika, mphamvu yolimba, komanso kukana kuvala kwa ufa wabwino kwambiri wa polyethylene wokhala ndi molekyulu wolemera wa 3-5 miliyoni pambuyo pa chithandizo cha mpweya wogwira ntchito wa F2/O2, ndikuwonjezera ku polyurethane elastomers mu chiŵerengero cha 10%. Kuphatikiza apo, chithandizo cha mpweya wogwira ntchito wa F2/O2 chingagwiritsidwe ntchito pa ulusi waufupi wolunjika wokhala ndi kutalika kwa 6-35mm komwe kwatchulidwa pamwambapa, komwe kungathandize kulimbitsa ndi kuuma kwa zinthu zophatikizika.
Nthawi yotumizira: Januwale-19-2024