N'chifukwa chiyani nsaluyo imakhala yachikasu? Kodi kupewa izo?

Zomwe zimayambitsa zovala zimakhala zachikasu

1.Photo yellowing

Chithunzi chikasu chimatanthawuza chikasu cha pamwamba pa zovala za nsalu zomwe zimachitika chifukwa cha kuwonongeka kwa ma molekyulu oxidation chifukwa cha kuwala kwa dzuwa kapena kuwala kwa ultraviolet. Zithunzi zachikasu zimakhala zofala kwambiri muzovala zamtundu wopepuka, nsalu zofiira ndi nsalu zoyera. Pambuyo pa nsaluyo ikuwonekera, mphamvu ya kuwala imasamutsidwa kunsaluutoto, zomwe zimabweretsa kusweka kwa matupi olumikizana ndikupangitsa kuwala kuzimiririka ndikupangitsa kuti nsalu pamwamba pakhale chikasu. Mwa iwo, kuwala kowoneka ndi kuwala kwa ultraviolet ndizomwe zimayambitsa kuzimiririka kwa utoto wa azo ndi utoto wa phthalocyanine.

2.Phenolic yellowing

Phenolic yellowing nthawi zambiri ndikuti NOX ndi phenolic mankhwala amalumikizana ndi kusamutsa ndikupangitsa chikasu cha nsalu pamwamba. Chinthu chachikulu chomwe chimagwira ntchito nthawi zambiri chimakhala ma antioxidants omwe ali m'matumba, monga butyl phenol (BHT). Pambuyo pochoka kufakitale, zovala ndi nsapato zidzakhala pansi pa nthawi yayitali yonyamula ndi kuyenda. Chifukwa chake BHT muzoyikamo imachita ndi NOX mlengalenga, zomwe zimatsogolera ku chikasu.

3.Oxidation yellowing

Oxidation yellowing imatanthawuza chikasu chomwe chimayambitsidwa ndi makutidwe ndi okosijeni a nsalu ndi mpweya kapena zinthu zina. Zovala za nsalu nthawi zambiri zimagwiritsidwa ntchito ndi utoto wochepetsera kapenaothandiziramu utoto ndi kumaliza. Akalumikizana ndi mpweya wotulutsa okosijeni, padzakhala kuchepa kwa okosijeni ndikupangitsa chikasu.

4.Whitening wothandizira chikasu

Whitening wothandizira chikasu makamaka amapezeka kuwala utoto nsalu. Pamene chotsalira cha whitening wothandizira pa zovala pamwamba amasamuka chifukwa cha kusungidwa kwa nthawi yaitali, zidzachititsa kuti m'deralo whitening wothandizira ndi zovala chikasu.

5.Softening wothandizira chikasu

Ma cationic ions muzothandizira zofewetsa zomwe zimagwiritsidwa ntchito pomaliza zovala zidzasinthidwa kukhala oxidized pamene zimatenthedwa ndi kutentha, kuwala ndi zina. Izi zimabweretsa chikasu cha mbali zofewa za nsalu.

 Ngakhale chikasu chimagawidwa m'mitundu isanu yomwe tatchula pamwambapa, pakugwiritsa ntchito kwenikweni, zochitika zachikasu za zovala nthawi zambiri zimayamba chifukwa cha zifukwa zosiyanasiyana.

Kodi mungapewe bwanji zovala chikasu?

1.Popanga, mabizinesi ayesetse kuchepetsa kugwiritsa ntchito whitening agent, kutsika kuposa muyezo wa yellowning agent.

2.Pokonzekera pomaliza, kutentha sikuyenera kukhala kokwera kwambiri. Kutentha kwapamwamba kudzapangitsa utoto kapena othandizira padziko lapansi pansalu kuchitika makutidwe ndi okosijeni akulimbana, ndiyeno chifukwa cha chikasu cha nsalu.

3.Popanga kuyika, kusungirako ndi kunyamula, payenera kugwiritsa ntchito zida zonyamula ndi BHT yochepa. Ndipo malo osungiramo ndi zoyendera ayenera kusungidwa kutentha kwabwino komanso mpweya wabwino momwe angathere kuti asatengere chikasu cha phenolic.

4. Pankhani ya phenolic yellowing ya zovala za nsalu chifukwa cha kulongedza, kuti muchepetse kutayika, ufa wochepa wochepa ukhoza kumwazikana pansi pa ma CD ndipo katoni iyenera kusindikizidwa kwa 1 kwa masiku a 2, kenako kutsegulidwa. ndi kuikidwa kwa 6 hours. Fungo likatha, fungo limathazovalaakhoza kupakidwanso. Kotero kuti chikasu chikhoza kukonzedwa mpaka pazipita.

5.Mu kuvala tsiku ndi tsiku, anthu ayenera kumvetsera kukonzanso, kusamba pafupipafupi komanso mofatsa komanso kupewa kuwonekera kwa nthawi yaitali.

Yogulitsa 44133 Anti Phenolic Yellowing Wothandizira Wopanga ndi Wopereka | Zatsopano (textile-chem.com)