Patent ID: 8354159
Filing Date: 2013-01-15
Classification: B29C,B29D,B29K,B32B,Y10T

Abstract:
1. A polyamide based mixed resin laminated film roll formed by winding up of the polyamide based mixed resin laminated film formed by laminating multiple polyamide based resin sheets composed of a mixed resin consisting of polyamide based resin and thermoplastic elastomer in a width of 0.2 m or more to 3.0 m or less, and a length of 300 m or more to 30000 m or less, wherein when the polyamide based mixed resin laminated film roll has a first sample cutout portion set up within 2 m from the winding end of film; and a final cutout portion set up within 2 m from the winding start of film, as well as has a sample cutout portion set up in approximately every 100 m from the first sample cutout portion, the polyamide based mixed resin laminated film roll satisfies the following requirements (1) and (2): (1) when the content of thermoplastic elastomer composition is measured and the average content rate which is the average value of these content rates is calculated, the degree of variability of the content of the thermoplastic elastomer constituent of all the samples is within the ±10% range with respect to the average content rate; and (2) the degree of variability of thickness throughout the full length in the longitudinal direction of a wound-up roll is within the range of ±2% to ±10% with respect to the average thickness, wherein the skin layer of the polyamide based mixed resin film wound up comprises 0.05 to 2.0% by weight inorganic particles, wherein the amount of thermoplastic elastomer of the polyamide based mixed resin film wound up is 1.0 to 15% by weight, wherein the thermoplastic elastomer of the polyamide based mixed resin film wound up is selected from polyamide based elastomers of block or random copolymers of polyamide based resin and polytetramethylene glycol or polyethylene glycol, wherein the polyamide based mixed resin laminated film is a film comprising a configuration of A/B/A or a film comprising a configuration of A/B/C, wherein A, B, and C represent A layer, B layer, and C layer, respectively, and wherein the sum of the thickness of the two A layers in the film comprising a configuration of A/B/A or the A-layer and C-layer in the film comprising a configuration of A/B/C is between 5% and 30% of the total thickness of the polyamide based mixed resin laminated film.