Udindo wa Polyurethane Catalysts mu Sandwich Panels

Bolodi la masangweji ndi zipangizo zomangira zomwe zimakhala ndi zigawo zitatu: zigawo ziwiri zakunja (kapena zomaliza) ndi zinthu zapakati pakati. Chimodzi mwa zipangizo zodziwika bwino zapakati ndi thovu la polyurethane (PU), lomwe lili ndi mphamvu zabwino kwambiri zotetezera kutentha komanso zothandizira kapangidwe kake. Gawo lapakati nthawi zambiri limayikidwa pakati pa zomaliza zolimba, zomwe nthawi zambiri zimapangidwa ndi chitsulo, pulasitiki, kapena zinthu zophatikizika zolimbikitsidwa ndi ulusi zomwe zimawonjezera mphamvu ndi kulimba kwa gululo. Zinthu zofunika kwambiri popanga zigawo zapakati za thovu la polyurethane zogwira ntchito kwambiri za mapanelo a masangweji ndi zinthu zoyambitsa polyurethane, monga MXC-15 ndi MXC-37.

Chifukwa chiyani polyurethane thovu?

Ma polyurethane thovu cores amagwiritsidwa ntchito kwambiri m'ma sandwich panels chifukwa cha kutenthetsa kwawo bwino (mtengo wake wapamwamba wa R), kupepuka, komanso kuthandizira kapangidwe kake. Ma board amenewa amagwiritsidwa ntchito kwambiri m'mafakitale komwe kutenthetsa kutentha ndi kukhazikika kwa kapangidwe kake ndikofunikira, monga:

1. Ntchito yomanga: Zipangizo zapakati zimapereka chitetezo chabwino kwambiri, zomwe zimapangitsa nyumba kugwiritsa ntchito mphamvu zochepa. Mwachitsanzo, pamene tinkagwira ntchito yosungiramo zinthu zozizira, mapanelo a sandwich otetezedwa ndi kutentha kwa dzuwa ankachepetsa kwambiri ndalama zogwiritsira ntchito mphamvu mwa kusunga kutentha koyenera.
2. Mufiriji ndi Kusunga Zinthu Zozizira: M'malo osungiramo zinthu zozizira, kutentha kwambiri ndikofunikira kwambiri kuti kutentha kukhale kotsika.Kukana kutentha kwa thovu la polyurethane kumapangitsa kuti likhale losankha kwambiri m'zipinda zozizira komanso zoziziritsira.
3. Zamlengalenga ndi Zapamadzi: Mu ntchito zapamlengalenga ndi zapamadzi, kuyanjana pakati pa kulemera ndi mphamvu ndikofunikira kwambiri. Ma panel a masangweji okhala ndi ma PU foam cores amapereka chithandizo chofunikira cha kapangidwe kake pomwe akuchepetsa kulemera.

Udindo waZothandizira za Polyurethane

Ma catalyst a polyurethane, monga MXC-15 ndi MXC-37, ndi ofunikira kwambiri pakupanga thovu la polyurethane. Ma catalyst amenewa amafulumizitsa kusintha kwa mankhwala pakati pa polyol ndi isocyanate, zomwe zimathandiza kupanga thovu lokhazikika lomwe lili ndi makhalidwe omwe amafunidwa.

MXC-15: Ndi chothandizira cha isocyanurate chotsika mtengo komanso chogwira ntchito bwino chomwe chili ndi mphamvu yosinthira kwambiri. Choyenera kupanga polyol yokhuthala kwambiri, chimalimbikitsa isocyanate reaction, chimagwira ntchito kwambiri, chimagwiritsidwa ntchito makamaka pa thovu lolimba la PU, kuphatikiza thovu lopopera, thovu la PIR, ndi dongosolo la thovu la PIR.

MXC-37: Chodziwikanso kuti DMAEE, kuwonjezera DMAEE ku polima kumachepetsa fungo la amine lomwe limapezeka kwambiri mu thovu. Itha kugwiritsidwa ntchito ngati chothandizira chachikulu chokha kapena ngati cocatalyst kuti muchepetse kugwiritsa ntchito ma catalyst a thovu a BDMAEE. Kwa okhazikika omwe amagwiritsa ntchito ester, thovu lofewa, thovu la microcellular, elastomer, RIM ndi RRIM, komanso kugwiritsa ntchito ma phukusi olimba a thovu.

Ubwino wa Polyurethane Foam mu Sandwich Panels

1. Kuteteza Kwambiri (R-Value): Thovu la polyurethane lili ndi mphamvu ya R-values ​​yapamwamba kwambiri pa inchi iliyonse poyerekeza ndi zinthu zina zotetezera kutentha. Izi zimapangitsa kuti mapanelo a sandwich okhala ndi PU foam cores azikhala osunga mphamvu kwambiri.
2. Wopepuka komanso Wolimba: Ma PU foam cores amachepetsa kulemera konse kwa sandwich panel popanda kuwononga mphamvu, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito pomwe kuchepetsa thupi ndikofunikira kwambiri.
3. Kukana Chinyezi ndi Moto: Thovu la polyurethane likhoza kupangidwa ndi zowonjezera kuti liwonjezere kuchedwa kwa moto komanso kukana chinyezi, ndikuwonjezera chitetezo ndi moyo wautali wa mapanelo a masangweji m'malo osiyanasiyana.
4. Kuchuluka ndi Mphamvu ZosinthikaMwa kusintha kapangidwe kake ndi zinthu zoyambitsa, opanga amatha kupanga thovu lokhala ndi makulidwe osiyanasiyana komanso mawonekedwe osiyanasiyana a makina, zomwe zimathandiza kuti mapanelo a sandwich akwaniritse zofunikira zinazake zogwiritsidwa ntchito.

Mapeto

Ma catalyst a polyurethane monga MXC-15 ndi MXC-37 ndi ofunikira kwambiri popanga ma cores a thovu la polyurethane ogwira ntchito bwino kwambiri pama panelo a sandwich. Ma catalyst awa amatsimikizira kuti thovulo likukwaniritsa zofunikira, monga kufunika koteteza kwambiri, mphamvu ya kapangidwe kake, komanso kulimba. Kusinthasintha kwa thovu la polyurethane, kuphatikiza ndi kulondola kwa ma catalyst amakono, kwalimbitsa malo ake m'mafakitale kuyambira pa zomangamanga mpaka kufiriji, magalimoto, ndi ndege. Ndi zatsopano mu ma catalyst formulations, opanga amatha kupitiliza kukonza magwiridwe antchito ndi kukhazikika kwa mapanelo a sandwich.