Patent ID: 7507476
Filing Date: 2009-03-24
Classification: B29B,C08J,C08L,Y10T

Abstract:
1. A multilayered pellet having a core-shell structure, wherein the core of the core-shell structure is made of an ethylene-vinyl alcohol copolymer resin composition (A), and the shell of the core-shell structure is made of an ethylene-vinyl alcohol copolymer resin composition (B), wherein the ethylene-vinyl alcohol copolymer resin composition (A) comprises any on of (i) to (iii): wherein the modified ethylene-vinyl alcohol copolymer (b) is at least one selected from the group consisting of the following compounds (1) to (4): wherein a heat sealing temperature (TA) (° C.) of the ethylene-vinyl alcohol copolymer resin composition (A) and a heat sealing temperature (TB) (° C.) of the ethylene-vinyl alcohol copolymer resin composition (B) satisfy Formula (1): wherein the heat sealing temperature (TA) is a lower limit of an adhesion temperature at which peel strength is at least 400 g/15 mm, wherein the peel strength is determined by the process of heat-sealing two films, each being made of the ethylene-vinyl alcohol copolymer resin composition (A), at a pressure of 0.98 MPa for 1 second, and conducting T-peel test with a tensile tester at a tensile speed of 250 mm/mm, and wherein the heat sealing temperature (TB) is a lower limit of an adhesion temperature at which peel strength is at least 400 g/15 mm, wherein the peel strength is determined by the process of heat-sealing two films, each being made of the ethylene-vinyl alcohol copolymer resin composition (B), at a pressure 0.98 MPa for 1 second, and conducting T-peel test with a tensile tester at a tensile speed of 250 mm/min.