Kodi chikopa, chikopa chofananira, nsalu za PU ndi PVC ndi chiyani?Njira yosiyanitsira ndi chiyani

Chikopa Chowona

Chikopa chenicheni ndi mawu ofala pamsika wachikopa.Ndi dzina lachizoloŵezi lachikopa chachilengedwe kusiyanitsa chikopa chopangidwa.Mu lingaliro la ogula, chikopa chenichenicho chimakhalanso ndi tanthauzo losakhala labodza.Amapangidwa makamaka ndi chikopa cha nyama.Pali mitundu yambiri ya zikopa, mitundu yosiyanasiyana, mapangidwe osiyanasiyana, mikhalidwe yosiyanasiyana, ndi mitengo yosiyana.Chifukwa chake, chikopa chenicheni ndi dzina lachikopa chachilengedwe chonse, komanso chizindikiro chosadziwika pamsika wazinthu.

Kuchokera pamalingaliro achilengedwe, khungu lililonse lanyama limakhala ndi epidermis yatsitsi ndi dermis.Chifukwa dermis ili ndi timitolo tating'onoting'ono ta ulusi, imakhala ndi mphamvu zambiri komanso imatha kupitilira

Epidermis ili pansi pa tsitsi komanso pafupi ndi kumtunda kwa dermis.Makulidwe a epidermis opangidwa ndi ma epidermal cell amitundu yosiyanasiyana amasiyana ndi nyama zosiyanasiyana.Mwachitsanzo, makulidwe a khungu la ng'ombe ndi 0.5 ~ 1.5% ya makulidwe onse;2-3% pakhungu la nkhosa ndi mbuzi;Chikopa cha nkhumba ndi 2-5%.Dermis ili pansi pa epidermis, pakati pa epidermis ndi subcutaneous minofu, ndipo ndi gawo lalikulu la khungu laiwisi.Kulemera kwake kapena makulidwe ake kumapangitsa kuposa 90% ya khungu laiwisi

Kufananiza khungu

Zikopa zina zimapangidwa kuchokera ku zikopa zosweka, ndipo mawonekedwe a chikopa ndi oposa 30%.Izi zimatchedwa kusakaniza khungu

Chikopa chopanga-

Chikopa chopanga ndicho cholowa choyamba chopangidwa ndi nsalu zachikopa.Zimapangidwa ndi PVC, plasticizer ndi zina zowonjezera, zokongoletsedwa ndi zowonjezera pansalu.Ubwino wake ndi wotchipa, wolemera mumitundu, ndi mitundu yambiri.Zoyipa zake ndikuti ndizosavuta kuumitsa komanso kusokoneza

PU -

PU ndi mtundu wa zinthu zopangira zopangira, zomwe zimakhala ndi chikopa ndipo zimakhala zolimba kwambiri.Ndi yosiyana ndi chikopa chochita kupanga.Chikopa cha PU chimagwiritsidwa ntchito m'malo mwa PVC chikopa chochita kupanga.Mtengo wake ndi wapamwamba kuposa PVC chikopa chochita kupanga.Ponena za kapangidwe ka mankhwala, ili pafupi ndi nsalu yachikopa.Simafunikira plasticizer kuti ikwaniritse zofewa, chifukwa chake sizikhala zolimba kapena zolimba.Pa nthawi yomweyi, ili ndi ubwino wa mitundu yolemera ndi mitundu yosiyanasiyana, ndipo mtengo wake ndi wotsika mtengo kuposa nsalu yachikopa, Choncho imalandiridwa ndi ogula.

Kusiyanitsa njira yachikopa chenicheni ndi chikopa chochita kupanga PU

Nsalu zachikopa ndi PVC chikopa chopanga PU chikopa chopangidwa ndi PU zimasiyanitsidwa ndi njira ziwiri: imodzi ndi kumbuyo kwa nsalu, yomwe imatha kuwonedwa kuchokera kumbuyo kwa PVC chikopa chochita kupanga PU chikopa chopanga.Ina ndi njira yoyaka moto yosungunuka, yomwe ndikutenga kachidutswa kakang'ono pamoto, kuti nsalu yachikopa isasungunuke, pamene PVC chikopa chopanga PU chisungunuka.

Kusiyanitsa pakati pa PU ndi zikopa zopangira:

Kusiyanitsa pakati pa chikopa chopanga cha PVC ndi chikopa chopangidwa ndi PU kumatha kusiyanitsa ndikuviika kachidutswa kakang'ono mu petulo kwa theka la ola, ndikuchichotsa.Ngati ndi chikopa cha PVC chochita kupanga, chimakhala cholimba komanso chophwanyika.Ngati ndi chikopa cha PU, sichikhala cholimba komanso cholimba