Nkhaniyi ikunena za MMA, BA, AA ngati ma monomers, ndipo ikufotokoza zinthu zomwe zimapangitsa kuti graft polymerization igwiritsidwe ntchito, monga momwe zimakhalira, kuchuluka kwa zinthu zomwe zawonjezeredwa komanso kutentha kwa choyambitsa ndi monomer iliyonse, ndipo ikupeza momwe zinthu zilili bwino pa njira yopangira graft polymerization. Choyamba, rabala imaphwanyidwa, kenako imasakanizidwa ndikusungunuka ndi solvent yosakanikirana pa 70~80°C, kenako choyambitsa BPO chimawonjezedwa m'magulu. Monomer yoyamba MMA yosungunuka ndi BOP imawonjezedwa pa 80~90°C kwa mphindi 20, kenako imawonjezedwa ndi monomer yachiwiri ya BPO, pambuyo pa mphindi zina 20, onjezani monomer yachitatu pa 84~88 ℃ ndikusakaniza kwa mphindi 45, sungani kutentha kwa maola 1.5~2, kenako pezani CR/MMA-BA-AA three-way graft polymerization adhesive, mphamvu ya peel ndi yayikulu kuposa CR/MMA-BA, mtengo wake ndi 6.6 KN.m-1.
Mawu ofunikira: Guluu wa Neoprene, Guluu wa nsapato, Guluu wa neoprene wolumikizidwa ndi zinthu zambiri.
Cellulose etherMCndiHPMCali ndi mphamvu yabwino yofalikira, emulsification, makulidwe, kumatira, kupanga filimu, kusunga madzi, komanso ali ndi kusungunuka kwabwino kwa madzi, ntchito pamwamba, kukhazikika, ndi kusungunuka mu zosungunulira zachilengedwe.
Zogulitsa zazikulu zomwe zapangidwa pano ndi mitundu ya RT series MC ndi HPMC, zomwe magiredi ake ndi 50RT (Methylcellulose), 60RT (Hydroxypropylmethylcellulose), 65RT (Hydroxypropylmethylcellulose), 75RT (Hydroxypropylmethylcellulose), zomwe zikugwirizana ndi magiredi a DOW Chemical Company ndi Methocel A, E, F ndi K, motsatana.
Zogulitsa za RT ndi zowonjezera zothandiza kwambiri pazida zomangira chifukwa cha kugwirizana kwawo, kukhazikika kwa kuyimitsidwa komanso kusunga madzi. Mwachitsanzo, zimatha kupangidwa kukhala "zomatira za pakhoma ndi pansi za ceramic", zomwe zimadziwika kuti ufa wa rabara, zomwe zagwiritsidwa ntchito ku Beijing West Railway Station, zotsatira zake zimakhala zabwino. Kuphatikiza apo, zitha kugwiritsidwa ntchito ngati electrolyte yopangidwa ndi gelled mu ma capacitor a electrolytic ndi ma grid a electrode olumikizidwa muzipangizo zamagetsi, monga atropine, aminopyrine ndi ma crystals a anal mu mankhwala, komanso ngati chokhuthala cha emulsions yamadzi mu utoto. Mu utoto wa latex ndi utoto wosungunuka m'madzi, zitha kugwiritsidwa ntchito ngati chopangira filimu, chokhuthala, chosakaniza ndi chokhazikika, ndi zina zotero. pomatira pa wallpaper, ufa wa rabara wothira madzi, ndi zina zotero.
Mawu ofunikira: Methyl Cellulose, Hydroxy Propyl Cellulose, guluu, kugwiritsa ntchito.
Kupanga guluu wa pulasitiki wopangidwa ndi madzi
M'zaka zaposachedwapa, njira yatsopano yomatira filimu ya pulasitiki pazinthu zosindikizidwa yapangidwa. Ndi BOPP (filimu ya polypropylene yozungulira biaxially) yokutidwa ndi guluu kenako n’kugwirizanitsidwa ndi zinthu zosindikizidwa pambuyo poti yakanikiza ndi silinda ya rabara ndi chotenthetsera kuti ipange pepala. / Pulasitiki yosindikizidwa ya 3-in-1. Izi zimakhudza vuto la mgwirizano wa mapepala ndi pulasitiki. BOPP ndi chinthu chosakhala cha polar, chifukwa chake, pakufunika guluu lomwe limamatira bwino ku zinthu za polar ndi zosakhala za polar.
Kusakaniza guluu wa SBS ndi epoxy resin kumayenderana bwino. SBS ndi elastomer viscose. Kuchokera ku curve yake yolephera, zitha kuwoneka kuti kuti guluu lizigwira bwino ntchito, liyenera kuyendetsedwa mozungulira SBS: epoxy resin = 2:1. Kuchokera ku curve ya mphamvu ya peel, zitha kuwoneka kuti chiŵerengero chikakhala chachikulu, mphamvu ya peel idzakhala yabwino kwambiri, koma kumatirira kudzawonjezekanso. Pofuna kupewa kumatira, SBS: epoxy resin = 1:1~2.5:1 ikhoza kulamulidwa kuti ipeze mphamvu ya peel yomwe ikukwera pang'onopang'ono. Poganizira mokwanira, dziwani SBS mu guluu waukulu: epoxy resin = 1:1~3.5:1.
Ntchito yaikulu yogwiritsira ntchito utomoni womata ndikuwonjezera mphamvu yomangirira ya matrix ndikuwonjezera kunyowa kwa guluu ndi pamwamba pake. Utomoni womata womwe wagwiritsidwa ntchito mu kafukufukuyu ndi rosin tackifier wopangidwa ndi rosin wamba ndi rosin womata mosiyanasiyana. Kudzera mu mayeso ambiri, zatsimikiziridwa kuti kuchuluka kwa rosin womata mu tackifier ndi 22.5%, ndipo mphamvu yochotsa guluu yokonzedwa molingana ndi chiŵerengerochi ndi 1.59N/25mm (pepala-pulasitiki).
Kuchuluka kwa chogwirizira kumakhudza kwambiri mphamvu za guluu. Zotsatira zabwino kwambiri ndi pamene chiŵerengero cha guluu wamkulu ndi chogwirizira ndi 1:1. Mphamvu ya peel N/mm pulasitiki-pulasitiki 1.4, pepala-pulasitiki 1.6.
Mu kafukufukuyu, MMA idagwiritsidwa ntchito ngati chosungunula kuti iphatikize SBS ndi MMA. Mayesero apeza kuti kugwiritsa ntchito MMA sikungokwaniritsa cholinga chokanda zigawo zomwe zili mu colloid, komanso kuchepetsa kukhuthala ndikuwongolera mphamvu ya guluu. Chifukwa chake, MMA ndi chosungunula choyenera chosinthidwa. Pambuyo pa mayesero, kuchuluka kwa MMA komwe kumagwiritsidwa ntchito ndi kuchuluka konse kwa guluu 5% ~ 10% ndikoyenera.
Popeza viscose yopangidwayo iyenera kusungunuka m'madzi, timasankha latex yoyera (polyvinyl acetate emulsion) ngati chonyamulira chosungunuka m'madzi. Kuchuluka kwa latex yoyera kumaimira 60% ya viscose yonse. Pambuyo poti viscose yochokera m'madzi yasinthidwa kukhala madzi kudzera mu kufalikira ndi kusungunuka kwa chonyamulira chosungunuka, ngati kusinthasintha kwake sikuli koyenera kugwiritsidwa ntchito, ikhoza kuchepetsedwa ndi madzi. Njira yosungunula iyi ndi yotsika mtengo komanso yopanda poizoni (palibe chifukwa chogwiritsa ntchito zosungunulira zachilengedwe), ndipo madzi abwino kwambiri osungunula ndi 10% ~ 20%.
Pofuna kuchotsa zotsalira za viscose, zayesedwa kuti yankho la Na2CO3 lochepetsedwa limagwiritsidwa ntchito ngati chothandizira cha alkalizing, ndipo zotsatira zake ndi zabwino kwambiri. Chiphunzitso cha zotsatira za chothandizira cha alkalizing chikhoza kukhala chakuti saponification reaction imayambitsa ma ion amphamvu a polar, monga ma ion a sodium, kotero kuti rosin acid yoyambirira yosasungunuka imasandulika kukhala mchere wa sodium wosungunuka. Kuphatikiza apo, ngati maziko olimba kwambiri awonjezedwa ku guluu, mphamvu yomatira idzatayika, kotero kuti guluuyo walephera, kotero guluuyo sayenera malo okhala ndi alkaline.
Kuyenda koyenera kwa njira.
Nthawi yotumizira: Epulo-25-2024