Patent ID: 9168695
Filing Date: 2015-10-27
Classification: B29C,B29K,B32B,C08J,Y10T

Abstract:
1. A method for producing a biaxially stretched polyamide resin film which is a biaxially stretched film having a polyamide resin layer, wherein an amount of a caprolactam monomer extracted from the film in distilled water at 100° C. for 2 hours is 0.1% by mass or less with respect to the mass of film, and the polyamide resin comprises a polyamide resin in which caproamide is a repeating unit thereof, comprising implementation, at a stage in a production process of the biaxially stretched film using the polyamide resin, of a monomer removal step in which the film is brought into contact with water set at a pH of 7.5 to 9.0 and a temperature of 53 to 70° C. for 0.5 to 10 minutes.