Synthetic leather

Abstract

The synthetic leather according to an embodiment includes a fibrous substrate, a foam layer containing a vinyl chloride-based resin and a plasticizer, and a non-foam layer containing a vinyl chloride-based resin and a plasticizer. In each of the foam layer and the non-foam layer, a content of the plasticizer is from 60 to 100 parts by mass with respect to 100 parts by mass of the vinyl chloride-based resin, the plasticizer contains a phthalate ester-based plasticizer and a polyester-based plasticizer, and a mass ratio of the phthalate ester-based plasticizer to the polyester-based plasticizer is from 73:27 to 87:13.

1 . A synthetic leather comprising a fibrous substrate, a foam layer containing a vinyl chloride-based resin and a plasticizer, and a non-foam layer containing a vinyl chloride-based resin and a plasticizer, in this order,
 wherein, in each of the foam layer and the non-foam layer, a content of the plasticizer is from 60 to 100 parts by mass with respect to 100 parts by mass of the vinyl chloride-based resin, the plasticizer contains a phthalate ester-based plasticizer and a polyester-based plasticizer, and a mass ratio of the phthalate ester-based plasticizer to the polyester-based plasticizer is from 73:27 to 87:13.   
     
     
         2 . The synthetic leather according to  claim 1 , wherein the polyester-based plasticizer in the foam layer and the non-foam layer has a number average molecular weight of from 500 to 2500. 
     
     
         3 . The synthetic leather according to  claim 1 , wherein the polyester-based plasticizer in the foam layer and the non-foam layer has a viscosity at 25° C. of from 150 to 5000 mPa·s. 
     
     
         4 . The synthetic leather according to  claim 1 , wherein the polyester-based plasticizer in the foam layer and the non-foam layer is an adipic acid-based polyester plasticizer. 
     
     
         5 . The synthetic leather according to  claim 1 , wherein the phthalate ester-based plasticizer in the foam layer and the non-foam layer is dialkyl phthalate (C9 to C11). 
     
     
         6 . The synthetic leather according to  claim 1 , further comprising an adhesive layer containing a polyurethane resin and/or a vinyl chloride-based resin between the fibrous substrate and the foam layer. 
     
     
         7 . The synthetic leather according to  claim 1 , further comprising a protective layer containing a polyurethane resin on or above the non-foam layer. 
     
     
         8 . The synthetic leather according to  claim 7 , further comprising an undercoat layer containing a polyurethane resin between the non-foam layer and the protective layer. 
     
     
         9 . The synthetic leather according to  claim 1 ,
 wherein the non-foam layer is a resin layer formed by applying a resin composition liquid for the non-foam layer onto a releasable substrate,   the foam layer is a resin layer formed by applying a resin composition liquid for the foam layer onto the non-foam layer formed on the releasable substrate,   each of the resin composition liquid for the non-foam layer and the resin composition liquid for the foam layer contains a vinyl chloride-based resin and a plasticizer containing a phthalate ester-based plasticizer and a polyester-based plasticizer at a mass ratio of from 73:27 to 87:13, and a content of the plasticizer is from 60 to 100 parts by mass with respect to 100 parts by mass of the vinyl chloride-based resin.