Process for manufacture of polyvinyl alcohol PVA prepared by partial or complete hydrolysis of PVAc with methanol. In the presence of sodium hydroxide catalyst, three reactions in the methanol solution of PVAc occur as follows: In the production process of PVA, there are two kinds of alkaline alc...
The invention discloses a production process of a PVA (polyvinyl alcohol)-based composite packaging material, relating to the field of film packaging materials. The production process comprises the following three technical processes: preparation of dialdehyde starch, preparation of jute fibers and ...
Polyvinyl alcohol-based fiber having excellent hot 优质文献 相似文献 参考文献 引证文献Polyvinyl-alcohol-based fibre having excellent hot water resistance and production process thereof The claim is for a polyvinyl-alcohol-based fibre which has been crosslinked by an acetalization product of an aliphatic...
Magnetic polymer particles on the basis of polyvinyl alcohol, process for the production and use The invention relates to magnetic, spherical PVAL particles produced through suspension of a polymer phase containing magnetic colloids in a vegetable oil phase containing a special emulsifier mixture. Particl...
PROBLEM TO BE SOLVED: To provide a laminate capable of preventing deterioration in a polyvinyl alcohol film such as scratches, contamination, deformation a... 北村 秀一,枝澤 敏行,早川 誠一郎 被引量: 0发表: 2020年 Gas barrier laminate and production process thereof A gas barrier laminate having...
Provided are high-performance polyvinyl alcohol fibers having excellent resistances to hot water and dry heat as well as excellent strength and elastic modulus. The fibers are produced from a highly syndiotactic polyvinyl alcohol containing units from vinyl pivalate in an appropriate amount, which render...
摘要: The present invention provides a polyvinyl alcohol film having a film thickness of 30 to 70 μm and a kinetic friction coefficient against a stainless-steel roll of 0.03 or less and a process for producing a polyvinyl alcohol film....
A polyvinyl alcohol hydrogel has a surface layer comprising a net- like structure formed by entanglement of fiber-like articles having a diameter of 0.1 to 50 &mgr;m. This gel has a large surface area and high capability of adhering microorganisms and permeating liquid, thereby exhibiting excell...
Bulk polymerization of vinyl pivalate using low-temperature azoinitiator and saponification for the preparation of poly(vinyl alcohol) microfibrils Polyvinylpivalat (PVPi) und von durch Verseifung von PVPi in KOH/Methanol/Wasser zu Polyvinylalkohol (PVA) erhaltenen mikrofibrillren PVA-Fasern wurde...
Process for the preparation of expansible, cross-linked polyvinyl alcohol ethers, and their use A process of preparation of swellable, crosslinked ethers of polyvinyl alcohol which are more than 40% by weight insoluble in water, by etherifying polyvinyl alcohol, with prior, simultaneous or subseque...