| 摘要 |
PROBLEM TO BE SOLVED: To obtain excellent durability in antifungal properties and adhesion to a marking film by providing, on one side of a composite sheet, a layer of a specified thickness having a main component of an antifungal polymer of a specified polymerization degree, which is composed of a homopolymer or the like of a phosphonium salt-containing vinyl monomer represented by a specified formula. SOLUTION: An antifungal layer of 1.5-15μm thickness having a main component of an antifungal polymer, which has a polymerization degree of 50-200, and is a homopolymer or copolymer of a phosphonium salt-containing vinyl monomer represented by formula I or II, is provided on at least one side of a composite sheet. In the formula n represents 9, 13, or 17; R1 , R2 , and R3 are each a 1-18C alkyl group; R1 , R2 , and R3 can be the same or different; m is an integer of 1-4; and X represents a halide ion such as a chloride ion, bromide ion, or the like, or a monovalent anion such as a tetrafluoroborate or the like.
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