Tsiku Lotumiza:17,Jul,2023

Vuto lofala kwambiri pomanga pomanga mkati mwa khoma la putty ufa ndikupukuta ndi kuyera.Kuti timvetse zifukwa peeling wa mkati khoma putty ufa, m`pofunika choyamba kumvetsa zofunika zopangira zikuchokera ndi machiritso mfundo ya mkati khoma putty ufa.Kenako, potengera kuuma, kuyamwa kwamadzi, kutentha, ndi kuuma kwanyengo pakhoma pakumanga kwa putty, zindikirani zifukwa zazikulu zopukutira mkati mwa khoma la putty ufa ndikugwiritsa ntchito njira zofananira kuthana ndi vuto la putty powder peeling.

一、 Basic zopangira zikuchokera mkati khoma putty ufa:

Zomwe zimafunikira kwambiri mkati mwa khoma la putty ufa ndi monga: zinthu zomangira zamkati (gray calcium), zodzaza (poda ya calcium yolemera, ufa wa talcum, ndi zina), ndi zowonjezera za polima (HPMC, mowa wa polyvinyl, ufa wa rabara, ndi zina).Mwa iwo, mkati mwa khoma putty ufa nthawi zambiri sawonjezera simenti yoyera kapena amangowonjezera simenti yoyera pang'ono.Redispersible latex ufa umakhala ndi mphamvu pang'ono pa mlingo wochepa, choncho sugwiritsidwa ntchito makamaka mkati mwa khoma la putty ufa chifukwa cha zovuta zamtengo wapatali kapena sugwiritsidwa ntchito kawirikawiri.

Chifukwa chake chifukwa cha vuto ndi chilinganizo cha mkati mwa khoma putty ufa wokha:

1. Zida zomangira organic, monga kuwonjezera pang'ono kwa calcium yotuwira komanso kutsika kwa calcium yotuwa;

2. Kuphatikizika kwa zigawo zomangirira muzowonjezera za polima zomwe zimakhala zochepa kwambiri kapena sizikugwirizana ndi makhalidwe abwino zingayambitse khoma lamkati la putty powder.

二、 Kuchiritsa makina amkati khoma putty ufa:

Machiritso a mkati mwa khoma putty ufa makamaka amadalira synergistic zotsatira laimu kashiamu ufa, HPMC ndi zina polima zina pansi pa mikhalidwe yonyowa kulimba, kupanga filimu, ndi kukhazikika ndondomeko machiritso.

Mfundo yowumitsa ya gray calcium powder:

Kuyanika ndi kuumitsa: Panthawi yokolopa, madzi ambiri amatuluka kuchokera ku ufa wotuwa wa calcium, kupanga maukonde akuluakulu ofanana pores mu slurry.Madzi aulere omwe amatsalira mu pores, chifukwa cha kugwedezeka kwa pamwamba pa madzi, amatulutsa kuthamanga kwa capillary, kumapangitsa kuti tinthu tating'onoting'ono ta calcium tigwirizane kwambiri, motero timapeza mphamvu.Pamene slurry ndi zina zouma, zotsatirazi amalimbikitsidwanso.Crystallization kuumitsa: Kwambiri omwazika colloidal particles mu slurry amasiyanitsidwa ndi kufalikira wosanjikiza pakati pa particles.Pamene madzi okhutira pang'onopang'ono amachepetsa, ndi kufalitsa wosanjikiza pang'onopang'ono thins, motero colloidal particles kutsatira wina ndi mzake pansi zochita za maselo mphamvu, kupanga okhudza malo maukonde a condensed nyumba, potero kupeza mphamvu.Kuuma kwa kaboni: Dothi lotereli limatenga mpweya wa CO2 kuchokera mumlengalenga, ndikupanga calcium carbonate yomwe imakhala yosasungunuka m'madzi.Njirayi imatchedwa carbonation of slurry.Ma co reactions ndi awa:

Ca(OH)2+CO2+H2O→CaCO3+(n+1)H2O

The kwaiye kashiamu carbonate makhiristo amakhala pamodzi wina ndi mzake kapena ndi calcium hydroxide particles, kupanga mwamphamvu zopiringizana kristalo maukonde, potero kupititsa patsogolo mphamvu ya slurry.Kuphatikiza apo, chifukwa cha kuchuluka kolimba kwa calcium carbonate poyerekeza ndi calcium hydroxide, slurry yowuma ya calcium powder imakhala yolimba kwambiri.3. Pambuyo pake ufa wa putty umagwiritsidwa ntchito pakhoma, madzi a putty amatayika makamaka m'njira zitatu:

Kutentha kwa madzi pamwamba pa putty pamene kashiamu wotuwa ndi simenti yoyera zimachitapo kanthu mu ufa wonyezimira wa putty pamwamba pa khoma.3. Chikoka cha zinthu zomanga pakukhetsa ufa wa putty ufa:

Zifukwa za kutaya ufa chifukwa cha zomangamanga zikuphatikizapo: kusamalidwa bwino komwe kumapangitsa kuti putty iume mofulumira komanso kusakhala ndi mphamvu zokwanira;Khoma loyambira ndi louma kwambiri, zomwe zimapangitsa putty kutaya madzi mwachangu;Kuchuluka kwa putty mumtanda umodzi.