Menene abubuwan da ke shafar faɗuwarFarashin EVA? Na yi imani cewa mutane da yawa sun damu sosai game da irin waɗannan matsalolin tare da samfuran EVA. A zahiri, EVA yana bayyana a cikin rayuwar gida azaman ainihin kayan yanzu. Sau da yawa yana aiki azaman kayan rufewa na sauti, kayan bene, kayan kwantar da hankali, da sauransu a cikin ayyukan ado. EVA abu yana da yawa abũbuwan amfãni a matsayin kafet, kamar mai kyau girgizar kasa juriya, ruwa mai hana ruwa, anti-lantarki, da dai sauransu To a yau Dongyang Yirong Luggage zai taƙaita hudu manyan dalilai na Fading na roba EVA kayayyakin:
Abubuwan da ke shafar faɗuwar samfuran filastik EVA. Fadewar samfuran launin filastik yana da alaƙa da juriya na haske, juriya na iskar oxygen, juriya mai zafi, juriya na acid da alkali na pigments da rini, da halaye na resin da aka yi amfani da su. Dangane da yanayin aiki da buƙatun amfani da samfuran filastik, abubuwan da aka ambata a sama na abubuwan da ake buƙata na pigments, dyes, surfactants, dispersants, resins mai ɗaukar hoto da abubuwan haɓaka tsufa yakamata a kimanta su gabaɗaya yayin samar da masterbatches kafin a zaɓa su.
Manyan dalilai guda hudu na faduwar samfuran EVA:
1. Acid da alkali juriya Fading na kayan filastik masu launin suna da alaƙa da juriya na sinadarai na launin (acid da juriya na alkali, oxidation da raguwar juriya)
Misali, molybdenum chrome ja yana da juriya ga dilute acid, amma yana kula da alkali, kuma cadmium rawaya baya jurewa acid. Wadannan pigments guda biyu da resin phenolic suna da tasiri mai ƙarfi na ragewa a kan wasu masu launi, wanda ke da matukar tasiri ga juriya na zafi da juriya na yanayi kuma yana haifar da faduwa.
2. Antioxidant Properties Wasu Organic pigments sannu a hankali dushewa bayan hadawan abu da iskar shaka lalacewa saboda macromolecular lalata ko wasu canje-canje.
Wannan tsari shine yanayin zafi mai zafi a lokacin sarrafawa da oxidation lokacin da aka haɗu da oxidants mai ƙarfi (kamar chromate a cikin chrome yellow). Bayan tafkin launi, azo pigment da chrome yellow sun haɗu, launin ja zai shuɗe a hankali.
3. The thermal kwanciyar hankali na zafi-resistant pigments yana nufin mataki na thermal nauyi asara, discoloration da Fading na pigment a sarrafa zafin jiki.
Inorganic pigments sun hada da karfe oxides da salts, tare da mai kyau thermal kwanciyar hankali da kuma high zafi juriya. Duk da haka, pigments na kwayoyin halitta za su fuskanci canje-canje a cikin tsarin kwayoyin halitta da ƙananan adadin bazuwa a wani zazzabi. Musamman ga PP, PA, da samfuran PET, zafin aiki yana sama da 280 ℃. Lokacin zabar masu launi, a gefe guda, ya kamata mu kula da juriya na zafi na pigment, kuma a gefe guda, ya kamata mu yi la'akari da lokacin juriya na zafi na pigment, wanda yawanci ana buƙatar zama 4-10 ruwan sama.
4. Juriya mai haske Ƙarfin haske na mai launi yana rinjayar faɗuwar samfurin
Don samfuran waje da aka fallasa zuwa haske mai ƙarfi, juriya na haske (juriyawar rana) matakin da ake buƙata na mai launi da aka yi amfani da shi alama ce mai mahimmanci. Idan matakin juriya na haske ba shi da kyau, samfurin zai shuɗe da sauri yayin amfani. Matsayin juriya na haske da aka zaɓa don samfuran masu jure yanayi bai kamata ya zama ƙasa da matakin 6 ba, zai fi dacewa matakin 7 ko 8, da matakin 4 ko 5 don samfuran cikin gida. Hasken juriya na resin mai ɗaukar hoto shima yana da babban tasiri akan canjin launi. Bayan hasken ultraviolet ya haskaka resin, tsarinsa na kwayoyin yana canzawa kuma ya bushe. Ƙara masu daidaita haske irin su ultraviolet absorbers zuwa masterbatch na iya inganta juriya na haske na masu launi da kayan filastik masu launi.
Manyan dalilai guda huɗu na faɗuwar samfuran filastik EVA ana raba su anan. Kula da abubuwan da ke sama na iya guje wa abubuwan da ba su da kyau kamar faɗuwar samfuran EVA; saboda fa'idodin kayan EVA, yanzu ana amfani da shi sosai a rayuwar yau da kullun.
Lokacin aikawa: Satumba-26-2024