Metallic sheet covered with polyester resin film and having high workability, and method of manufacturing same

Abstract

The present invention produces a polyester resin covered metal sheet having extremely excellent formability, which can be available for uses in which severe forming is practiced such as drawing, drawing and ironing, and drawn and stretch forming as well as the composite forming consisting of drawn and stretch forming followed by ironing, and a production method thereof. [Means for attaining objective] A polyester resin film is contacted to a metal sheet heated to a temperature of more than the melting temperature of the polyester resin, and covered on the metal sheet pinching and press laminating both members of the film and the metal sheet, followed by cooling the metal sheet at the cooling rate of more than 600° C. at the laminating process, which produces a metal sheet covered with polyester resin film in which true stress of 3.0 to 15.0 kg/mm2 causing true strain of 1.0 measured at 75° C. after covering.

Dependencies are inferred from the claim text.