| 摘要 |
PURPOSE:To obtain a resin film can be easily and spontaneously degraded by light and can be suitably used as an engrafting tape, etc., by mixing a vinyl chloride (copolymer) of a specified degree of polymerization with a photoreactive compound having a plurality of (meth)acryloyl groups and a filler. CONSTITUTION:100pts.wt. vinyl chloride polymer or its copolymer (A) (e.g., vinyl chloride/methyL acrylate copolymer) of a degree of polymerization of 600-2,500 is mixed with 5-80pts.wt. photoreactive compound (B) having at least two (meth)acryloyl groups in the molecule (e.g., trimethylolpropane diacrylate) and 50-200pts.wt. filler (C) (e.g., calcium carbonate) to obtain the purpose photodegradable resin film. When this film is used as an engrafting tape or the like, it can be spontaneously degraded by irradiation with sunlight, so that it can be removed without the need of manually undoing knots.
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