A matsayin kayan haɗin gwiwa,resin polyester mara cikakkenan yi amfani da shi sosai a fannin shafa fenti, robobi masu ƙarfafa gilashi, dutse na wucin gadi, sana'o'in hannu, da sauran fannoni. Duk da haka, launin rawayar resins marasa cikawa koyaushe matsala ce ga masana'antun. A cewar ƙwararru, abubuwan da ke haifar da rawayar resins marasa cikawa sun haɗa da waɗannan:
1. A lokacin da ake yin aikin hada sinadarin esterification na resin da ba shi da cikakken kitse, saboda tsufan da yake yi sakamakon yawan zafin jiki, yanayin zafin esterification na resin da ba shi da cikakken kitse ya kai 180 ~ 220 ° ko ma fiye da haka, a wannan zafin, resin yana da sauƙin canzawa zuwa rawaya saboda tsufan da yake yi, wanda hakan ke shafar bayyanar kayayyakin resin.
2. Rawaya da resin ke yi sakamakon fallasa hasken ultraviolet galibi yana faruwa ne sakamakon kasancewar zoben benzene a cikin resin (gami da aromatic dibasic acid/anhydrides da zoben benzene da styrene ya gabatar), wanda wataƙila ya faru ne saboda iskar shaka ta zafi na mahaɗan aromatic a yanayin zafi mai yawa. Lalacewa, yana da saurin canzawa ta lantarki, yana sa resin ya zama rawaya.
3. A yayin da ake samar da resin, kayan da aka samar suna fuskantar iskar oxygen saboda rashin kyawun aikin rufewa na na'urar. Sarkar kwayoyin halitta ta polyester mara cikawa ba wai kawai ta ƙunshi ƙungiyoyin ester, ƙungiyoyin meridian, da ƙungiyoyin antelope ba, har ma da haɗin gwiwa biyu da zoben aromatic. Yana fuskantar lalacewar yanayin zafi, kuma aikin da aka bayyana shine launin resin ya zama rawaya.
4. Tasirin ƙarin abubuwa kamar antioxidants, polymerization inhibitors, curing agents, da sauransu. Ana iya canza antioxidants na Amine cikin sauƙi zuwa nitroxide free radicals don yin launi ga samfurin. Masu hana polymerization da ake amfani da su akai-akai, kamar hydroquinone, sune Oxidation zuwa quinones a gaban quinones, waɗanda kansu suna da launi, don haka suna shafar launin resin. Wasu masana'antun magungunan warkarwa har yanzu suna amfani da tsarin acyl peroxide-tertiary amine da tsarin sabulun ƙarfe na ketone peroxide. Resin mai launi, mai sauƙin launi.
Ba shakka, akwai wasu dalilai da ke sa resin ya zama rawaya. Gabaɗaya, iskar oxygen mai zafi da hasken ultraviolet sune manyan dalilan da ke sa rawaya. Ana amfani da acid dibasic mai cikakken kitse (ko acid anhydride) maimakon aromatic dibasic acid (ko acid anhydride), kodayake ana iya amfani da shi zuwa wani mataki, ana iya sa launin resin ya zama mai sauƙi, amma idan aka yi la'akari da abubuwa daban-daban kamar aikin resin da farashi, wannan hanyar ba ta dace ba.
A cewar kwararru, baya ga cike iskar gas mara aiki a tsarin samarwa da adanawa don hana shiga iskar oxygen gwargwadon iko, hanya mafi inganci ita ce a ƙara antioxidants da masu shaye-shayen ultraviolet, wanda zai iya hana rawayar polyester mai jinkirin. Maganin hana rawayar da kwararru suka bayar da shawarar amfani da shi don resins marasa cika sune:
Ana zaɓar magungunan hana tsufa waɗanda ba su ƙunshi amines ba, kuma ana amfani da magungunan hana tsufa na farko da na taimako a hade. Manyan magungunan hana tsufa galibi ana samun su ne daga phenols, waɗanda za su iya kama ƙwayoyin cuta marasa sinadarin peroxide; magungunan hana tsufa na taimako sune phosphites, waɗanda yayin da suke rugujewar hydroperoxide, suna iya hana resin canza launin oxidative. Idan kuna son ƙara inganta juriyar rawaya da juriyar yanayi, ana ba da shawarar ƙara mai sha UV. Ƙara mai sha UV zai iya hana yanayin rawaya na kayan polymer a ƙarƙashin tasirin hasken ultraviolet, kuma yana ba da kariya mai kyau ga samfurin, yana hana raguwar sheƙi, ƙirƙirar fasa, kumfa, da kuma lalatawa na iya inganta juriyar yanayi na samfurin sosai, kuma yana da kyakkyawan tasiri idan aka yi amfani da shi tare da antioxidants. Tabbas, amfani da antioxidants da masu sha UV ba zai iya magance matsalar rawaya ba, amma a cikin wani takamaiman yanayi, har yanzu yana iya hana rawaya oxidative na samfuran polyester marasa cikawa, kiyaye launin ruwan samfurin a bayyane, da inganta ingancin samfurin.
Namuresin polyester mara cikawaAna samun su a cikin samfura daban-daban, da kuma resins marasa rawaya, kamar haka:
Muna kuma samarwafiberglass direct roving,tabarmar fiberglass, ragar fiberglass, kumarufin fiberglass da aka saka.
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Lokacin Saƙo: Mayu-10-2022
