Me yasa alamun alamun titi suke juya rawaya? Matsayin UV & guduro yanayi

Hanyar alamar launin rawaya shine da farko lalacewa ta hanyar lalata UV da kuma samun yanayi mai lalacewa, yana sulhunta gani da aminci. Ga yadda suke hulɗa:

1. Lalacewa UV
Hasken rana na Ultraoet (UV) haskoki na lalata manyan sunadarai a kayan alamomi. Don alamomin thermoplastic, UV Cutar UV Exidizes resins (E.G., C5 Petrooleum resin), samar da rawaya choromophores. Abun alama mai farin launi mai santsi (Tio₂) abun ciki ya rasa fararen sauri da sauri, kamar yadda Tii₂ garkuwa da UV amma Desgeres akan lokaci.

2. Yanactining
Thermoplastrast resins a cikin yanayin zafi (180-230 ° C), hanzarta hadawan abu da iskar shaka. Yin zafi yayin aikace-aikacen ko faɗuwar rana da sauri yana haɓaka resin lalata, yana haifar da launin rawaya.
Aromatic tpu resins (wanda aka yi amfani da shi a wasu sirkings) suna da haske ga UV-jawo launin rawaya saboda ga ginannun zobe na benzatic tpu.
Soscions
Fofa UV RUHU (E.G., Benzotrieriazole mahadi) don resins, toshe 270-380nm UV Rays.
Yi amfani da resins mai tsabta da isasshen tio₂ (≥18%) don haɓaka juriya UV UV.
Ciyar da aikace-aikace na aikace-aikacen (180-200 ° C) don hana lalata da zafin rana.
Ta hanyar magance kwanciyar hankali na UV da resin hanya na iya riƙe launi da kuma wasan kwaikwayon ya fi tsayi.