Upfu hweGlue yeUrea Formaldehyde, Yakagadzirira Kutumirwa ~

Tsananguro yeChigadzirwa
Urea-formaldehyde resin (UF), inozivikanwawo se urea-formaldehyde resin, i polycondensation ye urea ne formaldehyde pasi pechiito che catalyst (alkaline kana acidic catalyst) kuti igadzire urea-formaldehyde resin yekutanga, uye yozogadzira chikamu chekupedzisira chisinganyungudike uye chisinganyungudike pasi pechiito che curing agent kana additive. Thermosetting resin. Cured urea-formaldehyde resin ine ruvara rwakareruka kupfuura phenolic resin, inopenya, inodzivirira maasidhi asina simba uye alkali isina simba, ine hunhu hwakanaka hwekuputira, inodzivirira kupfeka zvakanaka, uye yakachipa. Ndiyo mhando inonyanya kushandiswa pakati pemaglues, kunyanya mukugadzirwa kwemabhodhi akasiyana-siyana ekugadzira muindasitiri yekugadzira huni, urea-formaldehyde resin uye zvigadzirwa zvayo zvakagadziriswa zvinosvika 90% yekushandiswa kwese kweglue. Zvisinei, urea-formaldehyde resin iri nyore kuora kana yakasangana neacids dzakasimba uye alkalis. Ine kusagadzikana kwemamiriro ekunze kwakashata, viscosity yekutanga isina kunaka, shrinkage yakakura, brittleness, inodzivirira mvura, uye kukwegura nyore. Mabhodhi ekugadzira akagadzirwa ne urea-formaldehyde resin anoburitsa formaldehyde panguva yekugadzira nekushandisa. Saka inofanira kuchinjwa.

Kushandiswa
Inogona kushandiswa muzvigadzirwa zvisingade mvura yakawanda uye zvisingade dielectric properties, zvakaita semagetsi, switch, machine handles, instrument casings, knobs, zvinodiwa zvezuva nezuva, zvishongo, ma mahjong tiles, zvivharo zvechimbuzi, uye zvinogona kushandiswawo mukugadzira mimwe midziyo yekudya.

Urea-formaldehyde resin ndiyo inonyanya kushandiswa pakunamira. Kunyanya mukugadzira mabhodhi akasiyana-siyana ekugadzira muindasitiri yekugadzira huni, urea-formaldehyde resin nezvimwe zvigadzirwa zvayo zvakagadziriswa zvinoita 90% yekushandiswa kwese kwekunamira.