khoom siv tsev

cement additive
pva raws li cov cement additive tuaj yeem ua kom cov nplaum thiab fluidity ntawm cov cement, qeeb lub sij hawm ziab ntawm cov cement saum npoo, ua kom muaj kev tsim kho kom haum, thiab tiv thaiv kev tawg ntawm cov cement txheej. haum rau phab ntsa thiab qab nthab kho kom zoo nkauj thiab pobzeb sib txuas, nrog kev siv yooj yim thiab cov nyhuv zoo.

forming board nplaum
Txawm hais tias nws yog cov organic fibers (xws li bagasse thiab sawdust) los yog cov khoom siv tsis zoo, pva lub siab ua haujlwm zoo thiab dej tsis kam tuaj yeem siv los sib tov, compress, thiab khi lawv ua ke los tsim gypsum prefabricated boards, sound-absorbing boards, thiab lwm yam panels.

coatings thiab tsev adhesives
pva ua rau cov kua dej condense nrog formaldehyde nyob rau hauv catalysis ntawm hydrochloric acid, uas ua rau cov dej-resistant pva formaldehyde polymer tebchaw, uas yog dav siv nyob rau hauv lub sab hauv thiab sab nrauv phab ntsa coatings, kho kom zoo nkauj ua, thiab sib koom ua ke filling nyob rau hauv lub tsev. pva txheej muaj qhov zoo ntawm cov huab cua tsis zoo, tiv thaiv dej, tsis o thiab tsis brittleness thaum sib cuag nrog dej, thiab tus nqi qis.
pva formaldehyde polymer kua kuj tuaj yeem siv ib leeg hauv kev ua vaj tse, phab ntsa putty nplaum thiab lwm yam kev siv, thiab tau siv dav hauv cov tsev thiab kho kom zoo nkauj. thaum siv nrog polyacrylamide, nws tuaj yeem ua tau raws li qhov xav tau ntawm ntau zaus.

cov qhab nia pom zooPVA 1799, pva 2088, pva 2099, pva 2299, pva 2499, pva 2699.