Kodi chikopa cha PU n'chiyani?

Chikopa cha PU chimatchedwa chikopa cha polyurethane, chomwe ndi chikopa chopangidwa ndi zinthu zopangidwa ndi polyurethane. Chikopa cha Pu ndi chikopa chodziwika bwino, chomwe chimagwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana zamafakitale, monga zovala, nsapato, mipando, mkati mwa magalimoto ndi zowonjezera, ma CD ndi mafakitale ena.

Chifukwa chake, chikopa cha pu chili ndi malo ofunikira kwambiri pamsika wa zikopa.

Kuchokera ku njira yopangira ndi lingaliro loteteza chilengedwe, chikopa cha pu chimagawidwa makamaka m'magulu awiri a chikopa cha pu chobwezerezedwanso ndi chikopa chachikhalidwe cha pu.

Kodi kusiyana pakati pa mitundu iwiri ya chikopa ndi kotani?

Choyamba tiyeni tiwone kusiyana kwa njira zawo zopangira.

Njira yopangira chikopa cha pu chachikhalidwe:

1. Gawo loyamba popanga chikopa cha pu ndikupanga polyurethane, ndipo isocyanate (kapena polyol) ndi polyether, polyester ndi zipangizo zina zopangira zimapangidwa kukhala polyurethane resin kudzera mu chemical reaction.

2. Pophimba gawo lapansi, utomoni wa polyurethane wokutidwa ndi gawo lapansi, pamwamba pa chikopa cha pu, gawo lapansi likhoza kusankhidwa ndi nsalu zosiyanasiyana, monga thonje, nsalu ya polyester, ndi zina zotero, kapena zipangizo zina zopangira.

3. Pokonza ndi kukonza, gawo lophimbidwa limakonzedwa ndikukonzedwa, monga kukongoletsa, kusindikiza, kupaka utoto ndi njira zina, kuti mupeze mawonekedwe, mtundu ndi mawonekedwe ofunikira pamwamba. Njira zokonzera izi zitha kupangitsa chikopa cha PU kuwoneka ngati chikopa chenicheni, kapena kukhala ndi mawonekedwe enaake.

4. Pambuyo pa chithandizo: Chikopa cha PU chikatha kukonzedwa, chingafunike kuchitidwa zinthu zina pambuyo pa chithandizo, monga kuteteza chophimba, kuchiza madzi, ndi zina zotero, kuti chikhale cholimba komanso mawonekedwe ake.

5. Kuwongolera ndi kuyesa ubwino: Mu magawo onse opanga, kuwongolera ndi kuyang'anira ubwino kudzachitika kuti zitsimikizire kuti chikopa cha PU chikukwaniritsa zofunikira pa kapangidwe ndi zofunikira.

Njira yopangira chikopa cha pu chobwezerezedwanso:

1. Kusonkhanitsa ndi kubwezeretsanso zinyalala zopangidwa ndi polyurethane, monga zinthu zakale za chikopa cha pu, zinyalala zopangidwa ndi zinthu zopangidwa, mutasankha ndikutsuka zinyalala ndi dothi pamwamba, kenako nkuuma;

2. Pulveretsani zinthu zoyera za polyurethane kukhala tinthu tating'onoting'ono kapena ufa;

3. Gwiritsani ntchito chosakaniza kusakaniza tinthu ta polyurethane kapena ufa ndi polyurethane prepolymers, fillers, plasticizers, antioxidants, ndi zina zotero, kenako muziike mu zipangizo zotenthetsera kuti zipange polyurethane matrix yatsopano. Kenako polyurethane matrix imapangidwa kukhala filimu kapena mawonekedwe enaake mwa kuyika, kuphimba kapena kuyika kalendala.

4. Zinthu zomwe zapangidwazo zimatenthedwa, kuzizira ndi kukonzedwa kuti zitsimikizire kuti zinthu zakuthupi ndi mankhwala ake ndi olimba.

5. Chikopa cha pu chobwezeretsedwanso, chopakidwa utoto, chopakidwa utoto, chopakidwa utoto ndi zina zochizira pamwamba kuti chipeze mawonekedwe ndi kapangidwe komwe mukufuna;

6. Yesani bwino kuti chikhale chogwirizana ndi miyezo ndi zofunikira zoyenera. Kenako, malinga ndi zosowa za makasitomala, dulani chikopacho m'makulidwe ndi mawonekedwe osiyanasiyana;

Kudzera mu njira yopangira, zitha kumveka kuti poyerekeza ndi chikopa chachikhalidwe cha pu, chikopa cha pu chobwezerezedwanso chimaika chidwi kwambiri pa kuteteza chilengedwe ndi kubwezeretsanso zinthu, kuchepetsa kuipitsa chilengedwe. Tili ndi ziphaso za GRS za chikopa cha pu ndi PVC, zomwe zimagwirizana ndi lingaliro la chitukuko chokhazikika komanso kuteteza chilengedwe, komanso machitidwe opanga zikopa.