Chokometsera nsalu ndi chinthu cha organic polymer chomwe chimawongolera mawonekedwe a nsalu, chimawonjezera kusinthasintha ndi kulemera kwa nsalu, ndikuchipangitsa kukhala cholimba. Ndi gawo lofunikira kwambiri la zinthu zothandizira kumaliza. Nsalu yokonzedwayo ingagwiritsidwe ntchito kwambiri popanga nsalu zokongoletsera, makamaka nsalu zotchinga, nsalu za thumba ndi nsalu zolukidwa zopindika. Imagwiritsidwanso ntchito popanga zolumikizira (zolumikizira zolumikizira ndi zolumikizira za resin).
M'mayiko otukuka akumadzulo, emulsion polyacrylate mankhwala chifukwa cha mtengo wake wotsika, kaphatikizidwe yabwino, ntchito khola ndi ubwino zina mu makampani nsalu yosindikiza ndi utoto wakhala ankagwiritsa ntchito. Zouma zomwe zimagwiritsidwa ntchito kwambiri ndi: melamine resin, urea-formaldehyde resin, polyacrylate, polyvinyl acetate, mowa wa polyvinyl ndi wowuma, ndi zinthu zake zosinthidwa.
Ubwino ndi kuipa kwa stiffeners
dzina | ubwino | kuipa |
Melamine utomoni | Pambuyo pomaliza nsalu kuuma, shrinkage, elasticity, amamva bwino, makamaka kupanga CHIKWANGWANI stiffness zotsatira zabwino. | Pambuyo pomaliza, nsaluyo ndi yosavuta kuyamwa chinyezi, kuuma ndi kuuma kutsika, chikasu ndi kuchepa kwa mphamvu, kumasulidwa kwa formaldehyde yaulere, ndi zina zotero. |
Urea-formaldehyde utomoni | Pambuyo pomaliza, nsaluyo imakhala ndi kuuma bwino komanso kutsika mtengo wamtengo wapatali. | Pambuyo pomaliza, nsaluyo imakhala ndi kutsekemera kosauka, kugwedeza m'manja, kuchepa kwakukulu, kukana kusamba bwino komanso kumasulidwa kwa formaldehyde yaulere. Kusakhazikika kosungirako kwa womaliza. |
Ma polyacrylates ndi polyvinyl acetates | Ili ndi mawonekedwe a kukana kuwala, kukana kukalamba komanso kulibe chikasu. Zosavuta kupanga, kukhazikika kosungirako bwino, sikutulutsa formaldehyde yaulere. Kuuma kwamphamvu ndikwabwino, makamaka pakumangirira kwa nsalu za cellulose. | Kuchuluka komweko kwa womaliza kumaliza, kuuma kwa nsalu zopangira ndi otsika kuposa melamine resin. Pambuyo pomaliza, nsaluyo ilibe elasticity ndi kumverera wandiweyani. Polyvinyl acetate ndi yofewa ndipo imakhala ndi chisanu. |
Pulovinyl mowa | Ili ndi rheology yabwino ndipo imatha kupanga filimu yokhala ndi mphamvu zambiri, yomwe imakhala ndi zotsatira zowumitsa bwino pansalu ya cellulose. | Ndizovuta kunyozeka pansi pa chilengedwe ndipo zimatha kupanga chithovu chochuluka m'madzi. Kutsirizitsa wothandizira mu nsalu pambuyo pa kutentha kumakhala kosavuta kufewetsa ndi kukhetsa magazi, kusakhoza kusambitsidwa bwino. |
Wowuma wosinthidwa | Ndizosavuta kupeza zopangira, zotsika mtengo, zosawononga, zosavuta kugwiritsa ntchito, zowonongeka, ndipo zimatha kupanga nsaluyo kukhala ndi zotsatira zouma zouma. | Pambuyo pomaliza, kuuma kwa nsalu kumachepa ndi chinyezi, ndipo n'zosavuta kuwonongeka ndikukhala nkhungu. Kusasamba bwino, kukhuta m'manja, komanso kusatanuka bwino. |
Pangani mfundo zazikulu
Kuwotcha kumakhudza kwambiri formaldehyde pamwamba pa nsalu ndi kuuma kwa nsalu pambuyo pomaliza. Ndi kuwonjezeka kwa nthawi yowotcha ndi kutentha kwa kutentha, kuuma kumawonjezeka ndipo zinthu za formaldehyde pa nsalu zimachepa kwambiri. Pamene ndondomekoyi ikuyendetsedwa pa 200 ° C × 60s, formaldehyde pa nsalu imatha kufika pansi pa 75ppm.
Izi zili choncho chifukwa ndi kuwonjezereka kwa njira yowumitsa, kuwoloka kwa stiffener kumakhala kokwanira, kotero kuuma kwa nsalu pambuyo pomaliza kumawonjezeka. Kumbali ina, formaldehyde pa nsalu yomaliza imakhala yosavuta kugwedezeka pansi pa kutentha kwakukulu, zomwe zimapangitsa kuti pakhale formaldehyde yochepa pa nsalu yomaliza.
Pali kusintha kwa mgwirizano pakati pa chinthu cholimba ndi formaldehyde. Ndi kusintha kwa chilengedwe chakunja (monga: kutentha, chinyezi, pH, ndi zina zotero), formaldehyde imalekanitsidwa mosalekeza. Pambuyo pomaliza chitsanzo choyamba cha nsalu, formaldehyde imachepa, ndipo nthawi yosungiramo imawonjezeka pang'onopang'ono. Nthawi yosungira ikafika masiku 10-12, formaldehyde imakhazikika.
Ngati kusungidwa pamalo opanda mpweya, formaldehyde yotulutsidwa idzaunjikana mochulukira, padzakhala kumverera kowawa komanso kowawa. Ndibwino kuti nsaluyo ikatha ndi kuumitsa utomoni iyenera kusungidwa pamalo abwino mpweya wabwino.
Ntchito zikhalidwe za mtundu uliwonse wa stiffener
- Nsalu ya thonje mukamaliza kuuma: mowa wa polyvinyl> polyacrylate> starch> melamine resin.
- Nsalu ya polyester mukamaliza kuuma: mowa wa polyvinyl> wowuma> melamine resin> polyacrylate.
- Kuchapira mwachangu: polyacrylate> polyvinyl mowa> melamine resin> wowuma.
- Mowa wa polyvinyl mu nsalu za thonje ndi polyester ukamaliza kuuma ndizokulirapo, koma kumva kumakhala kovutirapo. Mu nsalu ya poliyesitala si zotanuka monga melamine utomoni, kuchapa kuchapa ndi wachiwiri kwa polyacrylate. Wowuma womaliza kuuma kwa nsalu ndikwabwino, wachiwiri kwa mowa wa polyvinyl, koma kuthamangira kutsuka kumakhala koyipa kwambiri.
- Melamine resin kumaliza nsalu ya poliyesitala, kuuma mphamvu ndi bwino, ndi kumverera wandiweyani ndi elasticity ndi bwino. Koma mu thonje kutsirizitsa zotsatira si abwino, ndipo akamaliza nsalu kumasula formaldehyde. Polyacrylate mu thonje pa owuma kutsirizitsa zotsatira ndi bwino, mu polyester nsalu kumaliza zotsatira si abwino, koma kusamba mofulumira ndi bwino.
Zambiri zokhudza SINOYQX modified melamine formaldehyde resin, chonde titumizireni imelo: [email protected] , kapena titumizireni uthenga pa: +86-28-8411-1861.
Zithunzi ndi zolemba zina zidapangidwanso kuchokera pa intaneti, ndipo kukopera ndi kwa wolemba woyamba. Ngati pali kuphwanya kulikonse, chonde titumizireni kuti tifufute.