Binciken Ka'idodin Rubutu Da Aikace-aikacen Mashin Kofa Da Tagar

A matsayin kayan aiki mai mahimmanci a cikin masana'antar gine-gine, aikin ƙofa da taga taga shine don cimma hatimi, hana ruwa, da hana iska a gidajen abinci ta hanyar halayen jiki da sinadarai. Ka'idar aikin su ta farko ta dogara ne akan tasirin haɗin gwiwa na kayan abu da ƙirar tsari.

 

A zahiri, masu sintirin ruwa ne ko manna{0} kamar kafin a warke, suna cika ƙananan giɓi (yawanci 3{3}}20mm) tsakanin firam ɗin ƙofa da taga da bango da gilashi, suna samar da jiki mai na roba mai ci gaba. Bayan warkewa, kayan yana haɓaka gicciye -tsarin haɗin gwiwa, yana ba da juriya mai dorewa da daidaitawa ga ƙaurawar haɗin gwiwa wanda ya haifar da canjin yanayin zafi (± 30 digiri), sauyin yanayi, da matsa lamba na iska (ƙarar ƙaura ta wuce 25%). Wannan nakasawa na roba yana tabbatar da daidaiton lamba tsakanin ma'aunin rufewa kuma yana toshe hanyoyin ratsawa don iska da ruwan ruwa.

Tsarin hatimin sinadarai ya dogara da ƙirar ƙirar kayan. Silicone sealants suna samun juriyar yanayi ta hanyar ƙarfin haɗin gwiwa na Si{1}}O bonds (kimanin 452 kJ/mol). Ƙarfinsu na ƙasa (kimanin 20-24mN/m) yana korar ƙwayoyin ruwa kuma suna tsayayya da tsufa na UV. Polyurethane sealants, a gefe guda, suna amsawa tare da danshi a cikin iska don samar da haɗin urea ta ƙungiyoyin isocyanate, ƙirƙirar ƙaƙƙarfan tsarin cibiyar sadarwa mai sassauƙa - wanda ke ba da babban haɗin gwiwa-ƙarar haɗin gwiwa yayin kiyaye matsakaicin sassauci. Wasu samfura masu tsayi kuma sun haɗa da abubuwan maye na hydrophobic (kamar silica) ko magungunan ƙwayoyin cuta don ƙara ƙarfin ƙarfi.

Dole ne tagar zamani da masu kulle kofa su dace da buƙatun muhalli, tare da ƙaramin -VOC (madaidaicin ma'auni) ya zama na yau da kullun. Zaɓin madaidaicin madaidaicin yana buƙatar cikakken la'akari da nau'in substrate (misali, aluminium alloy, PVC), yanayin aiki (yankin da bushewa), da yanayin lodi na inji. Ana samun mafi kyawun aikin rufewa ta hanyar tsarin aikace-aikacen dabarun (misali, guda ɗaya - alluran gungu guda biyu - hadawa da sassa).