Zotsatira za ufa wa latex wosungunukanso pa ubwino wa ufa wa putty

Ponena za vuto lakuti ufa wa putty ndi wosavuta kuupanga, kapena mphamvu yake si yokwanira. Monga tonse tikudziwira, ether ya cellulose imafunika kuwonjezedwa kuti ipange ufa wa putty, HPMC imagwiritsidwa ntchito pa putty ya pakhoma, ndipo ogwiritsa ntchito ambiri sawonjezera ufa wa latex wosungunukanso. Anthu ambiri sawonjezera ufa wa polymer kuti asunge ndalama, koma ichi ndi chinsinsi cha chifukwa chake putty wamba ndi wosavuta kuupanga ndipo umakhala ndi mavuto a khalidwe la zinthu!

Putty wamba (monga 821 putty) amapangidwa makamaka ndi ufa woyera, guluu wochepa wa starch ndi CMC (hydroxymethyl cellulose), ndipo zina zimapangidwa ndi methyl cellulose ndi ufa wa Shuangfei. Putty iyi siimamatira ndipo siimadzimira.

Cellulose imatha kuyamwa madzi ndi kutupa ikasungunuka m'madzi. Zinthu zochokera kwa opanga osiyanasiyana zimakhala ndi kuchuluka kosiyana kwa kuyamwa madzi. Cellulose imagwira ntchito yosunga madzi mu putty. Putty youma imakhala ndi mphamvu inayake kwakanthawi, ndipo imachotsa ufa pang'onopang'ono pakapita nthawi yayitali. Izi zikugwirizana kwambiri ndi kapangidwe ka maselo a cellulose yokha. Putty yotereyi ndi yomasuka, imayamwa madzi ambiri, ndi yosavuta kupukutidwa, ilibe mphamvu, ndipo ilibe kusinthasintha. Ngati topcoat iyikidwa pamwamba, PVC yochepa imakhala yosavuta kuphulika ndi thovu; PVC yayitali ndi yosavuta kung'ambika ndi kusweka; chifukwa cha kuyamwa madzi ambiri, idzakhudza kapangidwe ka filimu ndi kapangidwe ka topcoat.

Ngati mukufuna kukonza mavuto a putty omwe ali pamwambapa, mutha kusintha njira ya putty, kuwonjezera ufa wa latex wosungunuka bwino kuti muwongolere mphamvu ya putty, ndikusankha hydroxypropyl methylcellulose HPMC yapamwamba kwambiri yokhala ndi mtundu wotsimikizika.

Pakupanga putty, ngati kuchuluka kwa ufa wa latex wosungunuka womwe wawonjezeredwa sikukwanira, kapena ngati ufa wochepa wa latex wa putty wagwiritsidwa ntchito, kodi udzakhudza bwanji ufa wa putty?

Ufa wa latex wosakwanira womwe umasungunukanso, chizindikiro chodziwikiratu ndichakuti ulusi wa putty ndi womasuka, pamwamba pake pamakhala phulusa, utoto womwe umagwiritsidwa ntchito popaka pamwamba ndi waukulu, mawonekedwe ake ndi otsika, pamwamba pake ndi wovuta kupanga filimu yolimba, ndipo zimakhala zovuta kupanga filimu yolimba ya utoto. Makoma otere amatha kusweka, kuphulika, kusweka, ndi kusweka kwa filimu ya utoto. Ngati mwasankha ufa wa putty wotsika, n'zoonekeratu kuti mpweya woipa monga formaldehyde womwe umapangidwa pakhoma udzavulaza ena.