Patent ID: 9605133
Date: 2017-03-28
CPC Classifications: B29C,C08J,C08K,C08L,C09D

Claim:
1. A polyvinyl alcohol aqueous solution comprising polyvinyl alcohol, a surface tension regulator, and water, the surface tension regulator being at least one selected from the group consisting of a polyether silicone compound, a glycerol compound, a propylene glycol compound, and a fatty acid ester compound, the glycerol compound being a surfactant represented by the formula (1): wherein R1 represents a C12-C17 alkyl group and n represents an integer of 1 to 8, the fatty acid ester compound being a compound represented by the formula (2): wherein R2 represents a hydrogen atom or a C1-C3 alkyl group, and R3 represents a hydrogen atom or a C1-C6 alkyl group, the propylene glycol compound being at least one selected from the group consisting of propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate and propylene glycol butyl ether acetate, and having a boiling point of 60° C. to 160° C. inclusive and a solubility parameter of 7 to 12 inclusive, the polyvinyl alcohol aqueous solution containing 500 to 10000 parts by weight of water based on 100 parts by weight of the polyvinyl alcohol and having a surface tension measured at 20° C. of 45 to 72 mN/m, and an amount of the polyether silicone compound being 0.01 to 0.2 parts by weight based on 100 parts by weight of the polyvinyl alcohol.