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AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsHiroyuki Ohba, Kazuhiko Hirose, Hideaki Tanaka, Nobuyuki Hisazumi
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Disclosed herein are polyvinyl alcohol products obtained by heat-treating a melt-molded polyvinyl alcohol product composed of a polyvinyl alcohol composition containing 0.01 to 3.0 mmol of a metal compound based on 1 g of polyvinyl alcohol; a polyvinyl alcohol product obtained by stretching a melt-molded polyvinyl alcohol product composed of a polyvinyl alcohol composition containing 0.01 to 3.0 mmol of a metal compound based on 1 g of polyvinyl alcohol; and a multi-layer product comprising at least one inner layer of a melt-molded product composed of a polyvinyl alcohol composition containing 0.01 to 3.0 mmol of a metal compound based on 1 g of polyvinyl alcohol.
A polyvinyl alcohol product obtained by heat-treating a melt-molded polyvinyl alcohol product composed of a polyvinyl alcohol composition containing 0.01 to 3.0 mmol of a metal compound based on 1 g of polyvinyl alcohol, said metal compound being selected from the group consisting of metal halides and metal nitrates where the metal element is selected from alkali metals, alkaline earth metals, and divalent to quadrivalent heavy metals.
A polyvinyl alcohol product obtained by stretching a melt-molded polyvinyl alcohol product composed of a polyvinyl alcohol composition containing 0.01 to 3.0 mmol of a metal compound based on 1 g of polyvinyl alcohol, said metal compound being selected from the group consisting of metal halides and metal nitrates where the metal element is selected from alkali metals, alkaline earth metals, and divalent to quadrivalent heavy metals.
A melt-molded polyvinyl alcohol product comprising a polyvinyl alcohol composition containing a metal compound which is selected from the group consisting of 0.4 to 0.8 mmol of a calcium halide or calcium nitrate based on 1 g of polyvinyl alcohol, 0.01 to 2.0 mmol of a lithium halide or lithium nitrate based on 1 g of polyvinyl alcohol, and a mixture thereof.
Dependencies are inferred from the claim text.