Ua ib yam khoom sib xyaw ua ke,Cov tshuaj polyester tsis muaj rojtau siv zoo hauv cov txheej txheej, cov iav fiber reinforced plastics, pob zeb dag, handicrafts, thiab lwm yam teb. Txawm li cas los xij, xim daj ntawm cov unsaturated resins yeej ib txwm yog teeb meem rau cov chaw tsim khoom. Raws li cov kws tshaj lij, cov ua rau daj ntawm cov unsaturated resins suav nrog cov hauv qab no:
1. Thaum lub sijhawm ua cov txheej txheem esterification ntawm cov roj hmab tsis muaj roj hmab, vim yog kev laus thermal yellowing los ntawm qhov kub siab, qhov kub esterification dav dav ntawm cov roj hmab tsis muaj roj hmab yog 180 ~ 220 ° lossis siab dua, ntawm qhov kub no cov roj hmab yooj yim tig daj vim yog kev laus thermal, cuam tshuam rau qhov tsos ntawm cov khoom roj hmab.
2. Qhov daj ntawm cov resin raug rau ultraviolet rays feem ntau yog los ntawm qhov muaj benzene rings hauv cov resin (xws li aromatic dibasic acids / anhydrides thiab benzene rings uas styrene qhia), uas tej zaum yog vim thermal oxidation ntawm cov aromatic compounds ntawm qhov kub siab. Kev puas tsuaj, nws yooj yim hloov pauv hluav taws xob, ua rau cov resin daj.
3. Thaum lub sijhawm tsim cov resin, cov khoom siv raw raug rau oxygen vim yog qhov ua haujlwm tsis zoo ntawm lub cuab yeej. Cov saw molecular ntawm cov polyester tsis muaj roj tsis tsuas yog muaj cov pab pawg ester, cov pab pawg meridian, thiab cov pab pawg antelope, tab sis kuj muaj ob chav sib txuas thiab cov nplhaib aromatic. Nws dhau los ntawm kev puas tsuaj thermal oxidative, thiab qhov ua tau zoo yog tias xim ntawm cov resin hloov daj.
4. Kev cuam tshuam ntawm cov khoom ntxiv xws li cov tshuaj antioxidants, cov tshuaj polymerization inhibitors, cov neeg sawv cev curing, thiab lwm yam. Cov tshuaj amine antioxidants yooj yim hloov mus ua nitroxide free radicals los ua kom cov khoom muaj xim. Cov tshuaj polymerization inhibitors feem ntau siv, xws li hydroquinone, yog Oxidation rau hauv quinones nyob rau hauv qhov muaj quinones, uas lawv tus kheej muaj xim, yog li cuam tshuam rau xim ntawm cov resin. Qee cov chaw tsim khoom ntawm cov neeg sawv cev curing tseem siv acyl peroxide-tertiary amine systems thiab ketone peroxide hlau xab npum systems. Xim, yooj yim-rau-xim resin.
Tau kawg, muaj lwm yam ua rau cov resin tig daj. Feem ntau hais lus, thermal oxygen thiab ultraviolet rays yog cov laj thawj tseem ceeb rau daj. Saturated dibasic acid (lossis acid anhydride) siv hloov aromatic dibasic acid (lossis acid anhydride), txawm hais tias nws tuaj yeem siv rau qee qhov, xim ntawm cov resin tuaj yeem ua kom sib dua, tab sis xav txog ntau yam xws li kev ua tau zoo ntawm cov resin thiab tus nqi, txoj kev no tsis zoo tagnrho.
Raws li cov kws tshaj lij, ntxiv rau kev sau cov pa roj inert hauv cov txheej txheem tsim khoom thiab khaws cia kom tiv thaiv kev sib cuag nrog cov pa oxygen ntau li ntau tau, ib txoj hauv kev zoo dua yog ntxiv cov tshuaj antioxidants thiab cov tshuaj absorbers ultraviolet, uas tuaj yeem tiv thaiv kev daj ntawm cov polyester qeeb. Cov tshuaj tiv thaiv kev daj uas cov kws tshaj lij pom zoo rau cov resins unsaturated yog:
Cov tshuaj antioxidants uas tsis muaj amines raug xaiv, thiab cov tshuaj antioxidants thawj zaug thiab cov tshuaj antioxidants pabcuam raug siv ua ke. Cov tshuaj antioxidants thawj zaug feem ntau yog cov phenols uas cuam tshuam, uas tuaj yeem ntes cov peroxide dawb radicals; cov tshuaj antioxidants pabcuam yog phosphites, uas thaum decomposing hydroperoxide, nws kuj tuaj yeem chelate cov hlau ions los tiv thaiv cov resin los ntawm oxidative discoloration. Yog tias koj xav txhim kho qhov kev tiv thaiv daj thiab huab cua tiv thaiv, nws raug pom zoo kom ntxiv UV absorber. Ntxiv UV absorber tuaj yeem tiv thaiv qhov tshwm sim daj ntawm cov ntaub ntawv polymer nyob rau hauv qhov kev ua ntawm ultraviolet rays, thiab muab kev tiv thaiv zoo rau cov khoom, zoo tiv thaiv kev txo qis ntawm gloss, tiam ntawm cov kab nrib pleb, npuas, thiab delamination tuaj yeem txhim kho qhov kev tiv thaiv huab cua ntawm cov khoom, thiab nws muaj cov nyhuv synergistic zoo thaum siv ua ke nrog antioxidants. Tau kawg, kev siv cov tshuaj antioxidants thiab UV absorbers tsis tuaj yeem daws qhov teeb meem ntawm daj, tab sis nyob rau hauv ib qho ntau yam, nws tseem tuaj yeem tiv thaiv oxidative daj ntawm cov khoom polyester unsaturated, khaws cov khoom watercolor pob tshab, thiab txhim kho cov khoom zoo. qib.
Peb licov polyester resins tsis muaj rojmuaj ntau hom qauv, nrog rau cov resins uas tsis daj, raws li nram no:
Peb kuj tsim khoomfiberglass direct roving,cov ntaub fiberglass, fiberglass mesh, thiabfiberglass roving.
Tiv tauj peb:
Xov tooj: +8602367853804
Email:marketing@frp-cqdj.com
Web: www.frp-cqdj.com
Lub sijhawm tshaj tawm: Tsib Hlis-10-2022
