Samfura masu launin filastik za su shuɗe saboda dalilai da yawa. Fushewar kayayyakin filastik masu launi yana da alaƙa da juriya ta haske, ƙin oxygen, juriya mai zafi, ƙwarin acid da ƙura alkali na tankar, da halaye na guduro da ake amfani da su.

Mai zuwa cikakken bincike ne game da abubuwan shuɗewa na canza launin filastik:

1. Haskewar mai launi

Azumin haske na mai launi kai tsaye yana shafar lalacewar samfurin. Don samfuran waje da aka fallasa su da haske mai ƙarfi, ƙimar saurin haske (saurin saurin haske) na mai launin da aka yi amfani da shi alama ce mai mahimmanci. Matsayin azumin haske mara kyau ne, kuma samfurin zai ɓace da sauri yayin amfani. Matsayin juriya na haske da aka zaɓa don samfuran da ke jure yanayin bai kamata ya zama ƙasa da maki shida ba, zai fi dacewa maki bakwai ko takwas, kuma kayan cikin gida na iya zaɓar maki huɗu ko biyar.

Hasken haske na gudan mai ɗauke da tasirin yana kuma da tasirin gaske a canjin launi, kuma tsarin kwayar halittar resin yana canzawa kuma yana dushewa bayan an saka masa iska ta hanyar hasken ultraviolet. Dingara masu karfafa haske kamar su ultraviolet absorbs a cikin masterbatch na iya inganta haɓakar hasken launuka da kayayyakin filastik masu launi.

2. Juriya mai zafi

Daidaitawar yanayin zafi na launin launinsa mai juriya mai zafi yana nufin mataki na asarar nauyi na zafin jiki, canza launi, da lalacewar launin launi a yanayin zafin aiki.

Launin Inorganic ya kunshi karafa ne da gishiri, tare da kyakkyawan kwanciyar hankali da kuma juriya mai zafi. Abubuwan da ke haifar da mahadi a cikin kwayoyin za su fuskanci canjin kwayoyin da karamin bazuwar a wani yanayin zafin jiki. Musamman ga kayayyakin PP, PA, PET, yanayin zafin aikin yana sama da 280 ℃. Lokacin zaɓar launuka, ya kamata mutum ya mai da hankali ga juriya mai zafi na launin launi, kuma ya kamata a yi la’akari da lokacin juriya mai zafi na launin a ɗayan hannun. Lokacin juriya na zafi yawanci 4-10min ne. .

3. Antioxidant

Wasu launin launin fata suna fuskantar lalacewar macromolecular ko wasu canje-canje bayan hadawan abu da iskar shaka a hankali kuma a hankali su kan suma. Wannan aikin shine yawan zafin jiki mai zafin jiki yayin aiki, da kuma hadawan abu idan anci karo da karfi (kamar chromate a cikin chrome yellow). Bayan tabkin, ana amfani da azo pigment da chrome yellow a hade, launin ja zai dusashe a hankali.

4. Acid da alkali juriya

Fushewar kayayyakin filastik masu launi yana da alaƙa da juriya ta sinadarai na mai launin (ruwan sha na acid da ƙirar alkali, haɓakar haɓakar iskar shaka). Misali, molybdenum chrome ja yana da tsayayya ga tsarma acid, amma yana da lahani ga alkalis, kuma launin rami na cadmium ba ya zama mai ƙin acid. Wadannan launuka biyu da sinadarin phenolic suna da tasirin rage karfi a kan wasu masu launuka, wanda yake matukar shafar juriya da zafin rana da kuma juriyar yanayi na masu launin kuma yana haifar da dusashewa.

Don lalacewar kayan launuka masu launin filastik, ya kamata a zaba shi gwargwadon yanayin sarrafawa da amfani da buƙatun kayayyakin filastik, bayan cikakken kimantawa game da abubuwan da aka ambata a sama na abubuwan da ake buƙata launuka, launuka, masu zafin ruwa, masu tarwatsawa, masu ɗaukan kaya mai ɗaukar kaya da anti- abubuwan kara tsufa.