| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a soil-proofing sheet material extremely little in the migration of a liquid plasticizing agent and suited for a cut-out letter sign or the like by rendering a colored layer soluble but a soil-proofing resin layer insoluble with a specific solvent. SOLUTION: This soil-proofing sheet material is obtained by laminating a soil-proofing resin layer 2 comprising a resin or the like which is obtained by compounding 100 pts.wt. of a vinyl chloride resin with 20-100 pts.wt. of a thermoplastic elastomer compatible with the vinyl chloride resin on at least one side surface of a fiber base cloth 1, and further placing a colored layer 3 on the soil-proofing resin layer 2. This soil-proofing sheet material is designed so that the colored layer 3 is dissolved, but the soil-proofing resin layer 2 is not dissolved by a specific solvent, for example, methyl ethyl ketone-toluene. Further, it is preferable that a resin constituting the soil-proofing resin layer 2 is produced by compounding 100 pts.wt. of a vinyl chloride resin with <=30 pts.wt. of a liquid plasticizer such as diheptyl phthalate, and a semi-transparent thermoplastic resin layer 4 is laminated on the surface of the fiber base cloth 1 where the soil-proofing resin layer 2 is not laminated.</p> |
