Cov txheej txheem:
- Yuav ua li cas yog polyvinyl cawv feem ntau siv rau?
- 3 yam khoom uas polyvinyl cawv siv hauv?
- polyvinyl cawv ua rau dab tsi?
- Puas polyvinyl cawv muaj kev nyab xeeb rau daim tawv nqaij?
Video: Thaum twg siv polyvinyl cawv?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
PVA yog siv hauv sizing tus neeg sawv cev uas muab lub zog ntau dua rau cov xov paj thiab ua rau daim ntawv tiv taus cov roj thiab roj ntau dua. Nws kuj yog siv los ua ib feem ntawm cov nplaum thiab cov emulsifiers, ua cov yeeb yaj kiab tiv thaiv dej, thiab ua cov khoom pib rau kev npaj ntawm lwm cov resins.
Yuav ua li cas yog polyvinyl cawv feem ntau siv rau?
Polyvinyl cawv yog siv dav rau ntxiv dag zog rau cov xov paj thiab cov ntaub ntawv, tshwj xeeb tshaj yog ua rau yav tas los ua rau cov roj thiab roj. Nws kuj yog siv rau hauv kev ua si nuv ntses dej tshiab.
3 yam khoom uas polyvinyl cawv siv hauv?
Selvol Polyvinyl Cawv feem ntau yog siv rau adhesives, tab sis nws kuj tau siv dav hauv kev lag luam thiab kev ua liaj ua teb hauv emulsion polymerization, zaj duab xis thiab ntim khoom, nrog rau cov roj av cementing, ntawv, textiles, ceramics, thiab noob txheej.
polyvinyl cawv ua rau dab tsi?
PVOH TSIS 'BIODEGRADE' IT 'DISSOLVES'
Nyob hauv peb qhov kev tshawb fawb, PVOH tsis biodegrade ntau npaum li nws yaj mus rau " non-harmful" monomer, thiab thaum cov molecules tuaj yeem biodegrade, lub sijhawm nws siv rau lawv kom biodegrade tiag tiag yog pos huab me ntsis.
Puas polyvinyl cawv muaj kev nyab xeeb rau daim tawv nqaij?
Txoj kab hauv qab. Polyvinyl cawv muaj kev nyab xeeb hauv koob tshuaj me me. Tab sis nyob deb ntawm qhov ncauj qhov ntswg. Nyob rau hauv siab concentrations siv no, nws yuav qhuav, irritating, thiab zuag qhia tag nrho tsis zoo rau daim tawv nqaij.
Pom zoo:
Puas muaj cawv tsis muaj cawv?
Raws li Cowez, qhov tseeb tsis muaj cawv / cawv cawv yog tsim los ntawm cawv uas tau fermented nrog cov poov xabthiab tau ua tiav cov txheej txheem vinification, tom qab ntawd mus dhau txheej txheem ntxiv ntawm kev muaj cov cawv tshem tawm.
Puas muaj cawv txiv hmab muaj cawv nyob hauv nws?
Yuav hu ua "sab ntsuj plig", cov khoom yuav tsum yog los ntawm kev ua liaj ua teb thiab yuav tsum tau ua los ntawm "ob chav fermentation". Thawj fermentation yog qab zib rau cawv thiab qhov thib ob yog cawv rau acetic acid .
Puas yog lawv ua cawv tsis muaj cawv?
Raws li Cowez, qhov tseeb tsis muaj cawv / cawv cawv yog ua los ntawm cov cawv uas tau fermented nrog cov poov xab thiab tau ua tiav cov txheej txheem vinification, ces mus dhau txheej txheem ntxiv ntawm kev muaj cov cawv tshem tawm. Tag nrho lwm cov khoom lag luam raws li cov txiv hmab txiv ntoo uas tsis muaj cawv yog kua txiv hmab txiv ntoo .
Qhov twg monomer siv los ua ke polyvinyl chloride?
PVC yog tsim los ntawm nws cov monomer, vinyl chloride. PVC yog cov yas tawv uas ua softer thiab hloov tau yooj yim los ntawm kev sib ntxiv ntawm cov yas yas, feem ntau siv yog phthalates . Qhov twg hauv qab no yog monomer ntawm polyvinyl chloride?
Thaum twg siv polyvinyl acetate?
Nyob hauv nws daim ntawv thov tseem ceeb tshaj plaws, polyvinyl acetate ua cov khoom siv ua yeeb yaj kiab hauv cov xim dej (latex) xim; nws kuj siv rau hauv cov nplaum . Vim li cas polyvinyl acetate siv los ua cov nplaum? PVA adhesives tsim cov yeeb yaj kiab zoo nkauj uas muaj huab cua zoo thiab tiv taus dej, roj, roj, thiab roj av.
