Kodi PU chikopa ndi chiyani?

Chikopa cha PU chimatchedwa chikopa cha polyurethane, chomwe ndi chikopa chopangidwa ndi polyurethane. Chikopa cha Pu ndi chikopa wamba, chomwe chimagwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana zamafakitale, monga zovala, nsapato, mipando, mkati mwagalimoto ndi zida, zonyamula ndi mafakitale ena.

Chifukwa chake, chikopa cha pu chimakhala ndi malo ofunikira kwambiri pamsika wachikopa.

Kuchokera pakupanga ndi lingaliro lachitetezo cha chilengedwe, chikopa cha pu chimagawika m'mitundu iwiri ya zikopa zobwezerezedwanso ndi zikopa zachikhalidwe za pu.

Kodi pali kusiyana kotani pakati pa mitundu iwiri ya zikopa?

Tiyeni choyamba tione kusiyana kwa njira zawo zopangira.

Njira yopangira zikopa za pu:

1. Njira yoyamba yopangira chikopa cha pu ndi kupanga polyurethane, ndi isocyanate (kapena polyol) ndi polyether, polyester ndi zipangizo zina zopangidwa ndi utomoni wa polyurethane pogwiritsa ntchito mankhwala.

2. Kupaka gawo lapansi, utomoni wa polyurethane wokutidwa pa gawo lapansi, monga pamwamba pa chikopa cha pu, gawo lapansili likhoza kusankhidwa mitundu yosiyanasiyana ya nsalu, monga thonje, nsalu ya polyester, etc., kapena zipangizo zina zopangira.

3. Kukonzekera ndi kuchiza, gawo lapansi lophimbidwa limakonzedwa ndikuthandizidwa, monga embossing, kusindikiza, kupaka utoto ndi njira zina, kuti apeze mawonekedwe ofunikira, mtundu ndi mawonekedwe apamwamba. Njira zopangira izi zitha kupangitsa kuti chikopa cha PU chiwoneke ngati chikopa chenicheni, kapena kukhala ndi mawonekedwe apadera.

4. Pambuyo pochiza: Pambuyo pomaliza kukonza, chikopa cha PU chingafunikire kukumana ndi njira zina zochizira, monga chitetezo chotchinga, chithandizo chamadzi, ndi zina zotero, kuti chikhale cholimba komanso mawonekedwe ake.

5. Kuwongolera khalidwe ndi kuyesa: Pazigawo zonse za kupanga, kuyang'anira khalidwe ndi kuyang'anitsitsa kudzachitidwa kuti zitsimikizire kuti chikopa cha PU chikugwirizana ndi mapangidwe ndi zofunikira.

Kapangidwe ka zikopa zobwezerezedwanso za pu:

1. Sonkhanitsani ndi kukonzanso zinthu zotayidwa za polyurethane, monga zinthu zakale zachikopa za pu, zinyalala zopangira, mutatha kusanja ndi kuyeretsa zonyansa ndi dothi, ndiyeno pukutani;

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

3. Gwiritsani ntchito chosakaniza kusakaniza tinthu tating'onoting'ono ta polyurethane kapena ufa ndi polyurethane prepolymers, fillers, plasticizers, antioxidants, etc., ndiyeno kuziyika mu zipangizo zotenthetsera za mankhwala kuti apange matrix atsopano a polyurethane. Matrix a polyurethane amapangidwa kukhala filimu kapena mawonekedwe odziwika mwa kuponyera, kuphimba kapena kusungitsa.

4. Zomwe zimapangidwira zimatenthedwa, zimakhazikika ndikuchiritsidwa kuti zitsimikizidwe kuti zimakhala ndi thupi komanso kukhazikika kwa mankhwala.

5. Chikopa cha pu chochizidwanso, chojambulidwa, chokutidwa, chopaka utoto ndi zinthu zina zapamtunda kuti mupeze mawonekedwe ndi mawonekedwe omwe mukufuna;

6. Chitani kuyendera kwaubwino kuti mukwaniritse zofunikira ndi zofunikira. Ndiye malinga ndi zofuna za makasitomala, dulani makulidwe osiyanasiyana ndi mawonekedwe a chikopa chomalizidwa;

Kudzera mukupanga, zitha kumveka kuti poyerekeza ndi zikopa zachikhalidwe za pu, chikopa chobwezerezedwanso cha pu chimayang'ana kwambiri chitetezo cha chilengedwe ndi kubwezeretsanso zinthu, kuchepetsa kuwononga chilengedwe. Tili ndi ziphaso za GRS za chikopa cha pu ndi pvc, zomwe zimagwirizana ndi lingaliro lachitukuko chokhazikika komanso chitetezo cha chilengedwe, komanso kuchita kupanga zikopa.