| 摘要 |
PURPOSE:To provide a so-called low migratable vinyl chloride resin sheet, based on vinyl chloride resin (especially, paste) as a raw material, such that migration of plasticizer contained in the sheet is prevented and extraction of the plasticizer by solvent is also prevented. CONSTITUTION:A polyester plasticizer of high molecular weight and an ester carboxylate plasticizer of mononuclear aromatic carboxylic acid having 3 to 6 carboxylate groups and a bulky chemical structure, are jointly used at a weight ratio of 1:9 to 9:1. Consequently, an increase of the viscosity of vinyl chloride paste which occurs, when the polyester plasticizer of high molecular weight is used alone, and the inferior gelation characteristic of vinyl chloride paste which is when the bulky ester carboxylate plasticizer of mononuclear aromatic carboxylic acid is used alone, are eliminated by synergic action of the joint use of both plasticizers. Thus, it is possible to obtain the low migratable vinyl chloride resin sheet which can be easily manufactured and is satisfactory as a finished product. |
