| 摘要 |
PURPOSE:To form a synthetic resin sheet having a contoured surface that gives it a steric feeling, by printing a base material surface with a foaming suppressive agent, coating the base material surface with a foamable synthetic resin paste, and then heating it to cause it to foam and gel. CONSTITUTION:The surface of a base material 1 is printed with a solution of a foaming suppressive agent comprising an organic acid, such as maleic acid, fumaric acid, adipic acid, or the like by a gravure roll or silk screen to form a printed layer 1A. The surface of the base material 1 is coated with a foamable synthetic resin paste by a coater such as a reverse coater, knife coater, etc. generally in an amount of 300-500g/m<2> to form a paste coating layer 2. Then the surface of the paste coating layer is coated with a nonfoamable synthetic resin paste generally in an amount of 300-500g/m<2> to form a paste coating layer 3. Then the paste coating layer 2 is heated in a heating oven to cause it to foam and gel. Thus, projections 14 are formed on the surface to correspond to the foaming suppressive agent layer 1A and a synthetic resin sheet 10 that includes a foamed layer 12 covered with a protective layer 13 is produced. |
