Chiyambi cha TPU

Thermoplastic polyurethane (TPU) ndi elastomer yosungunuka ya thermoplastic yokhazikika komanso yosinthika.Ili ndi mawonekedwe a pulasitiki ndi mphira ndipo motero imawonetsa zinthu monga kulimba, kusinthasintha komanso kulimba kwamphamvu kwambiri.

TPU, m'badwo watsopano wa zinthu za thermoplastic elastomer.Kapangidwe kake kumaphatikizapo gawo lolimba ndi gawo lofewa, lopangidwa ndi polyols, isocyanate ndi unyolo wowonjezera ndi condensation reaction.
The mbali TPU monga chilengedwe wochezeka, processing zosavuta, ntchito zosiyanasiyana, yobwezeretsanso etc . kesi, overmolding, nsapato, filimu, zomatira, lamba & conveyor, waya & chingwe etc.

Malinga ndi polyols mtundu, TPU akhoza kugawidwa mu kalasi poliyesitala, kalasi polyether, kalasi polycaprolactone ndi polycarbonate kalasi etc.; malinga ndi isocyanate mtundu, TPU akhoza kugawidwa mu onunkhira TPU ndi aliphatic TPU.Mitundu yosiyanasiyana ya TPU ili ndi katundu wosiyanasiyana, imatha kugwiritsidwa ntchito mosiyanasiyana.Mtundu wa kuuma kwa TPU ndi waukulu, wophimba 50A-85D.

• Gawo Lofewa (polyether kapena polyester): Amapangidwa kuchokera ku polyol ndi isocyanate yomwe imapereka kusinthasintha ndi mawonekedwe a elastomeric a TPU.
• Gawo Lolimba (lonunkhira kapena aliphatic): limapangidwa kuchokera ku chain extender ndi isocyanate yopatsa TPU kulimba kwake komanso magwiridwe antchito athupi.
  1. Ma TPU onunkhira - zochokera ku isocyanates monga MDI
  2. Aliphatic TPUs - zochokera ku isocyanates monga HMDI, HDI ndi IPDI

Thermoplastic polyurethanes ndi zotanuka komanso kusungunuka-processible.Zowonjezera zimatha kukulitsa kukhazikika kwa mawonekedwe ndi kukana kutentha, kuchepetsa mikangano, ndikuwonjezera kuchedwa kwa lawi, kukana kwa bowa, ndi nyengo.

Ma TPU onunkhira ndi ma resin amphamvu, ogwiritsidwa ntchito nthawi zonse omwe amakana kuukiridwa ndi tizilombo toyambitsa matenda, amalimbana ndi mankhwala.Kukongoletsa kokongola, komabe, ndiko chizolowezi cha zonunkhiritsa zowononga ndi njira zaulere zomwe zimayambitsidwa ndi kutentha kapena kuwala kwa ultraviolet.Kuwonongeka kumeneku kumabweretsa kusinthika kwazinthu komanso kuwonongeka kwa thupi.

Zowonjezera monga ma antioxidants, ma UV absorbers, olepheretsa amine stabilizer amagwiritsidwa ntchito kuteteza polyurethanes ku UV kuwala oxidation motero kupanga thermoplastic polyurethanes oyenera ntchito zosiyanasiyana zomwe zingafunike kukhazikika kwa kutentha ndi / kapena kuwala.

Aliphatic TPU, kumbali ina, ndi yopepuka yokhazikika ndipo imakana kusinthika kuchokera ku UV.Amakhalanso omveka bwino, zomwe zimawapangitsa kukhala oyenerera ma laminates kuti aziphimba magalasi ndi glazing.