Patent ID: 11499022

Abstract:
To provide a novel material that maintains suppleness which is the advantage of a material using fibers and has a low thermal shrinkage ratio, and a method for producing the material, a partially welded material using the material, a composite material, and a method for producing a molded product.A material including: a first region, a fiber region, and a second region continuously in a thickness direction; the first region and the second region being each independently a resin layer including from 20 to 100 mass % of a thermoplastic resin component and from 80 to 0 mass % of reinforcing fibers; the fiber region including from 20 to 100 mass % of thermoplastic resin fibers and from 80 to 0 mass % of reinforcing fibers; the thermoplastic resin component included in the first region and the thermoplastic resin component included in the second region each independently having a crystallization energy during temperature increase of 2 J/g or greater, measured by differential scanning calorimetry; and the thermoplastic resin fibers included in the fiber region having a crystallization energy during temperature increase of less than 1 J/g, measured by differential scanning calorimetry; wherein the crystallization energy during temperature increase is a value measured by using a differential scanning calorimeter (DSC) in a nitrogen stream while heating is performed from 25° C. to a temperature that is 20° C. higher than a melting point of the thermoplastic resin component or the thermoplastic resin fibers at a temperature increase rate of 10° C./min.