Patent ID: 6136395
Filing Date: 2000-10-24
Classification: B32B,B65D,C09D,Y10S,Y10T

Abstract:
A metal can body having improved impact resistance having a can height direction and an inner surface coated with a coating of an organic resin, wherein:a main component of said organic resin coating is a polyester resin containing axially oriented crystals;an intrinsic viscosity (IV) of said polyester is 0.6 dl/g or more;parameter A representing the ratio of axial orientation of the crystals in the can height direction is A.gtoreq.0.4; andparameter B representing the degree of plane orientation of axially orientated crystals in the can height direction is B.gtoreq.0;wherein the parameter A is a parameter showing the existence ratio of the crystals that have the C-axis extending to the can height direction among the oriented crystals in the polyester resin coating, andwherein the parameter B is a parameter showing the existence degree of the crystals that have (100) planes in parallel with the surface of the resin coating among the oriented crystals that have the C-axis extending to the can height direction,wherein the polyester resin comprises polyethylene terephthalate, polybutylene terephthalate, polyethylene terephthalate copolymer, or polybutylene terephthalate copolymer, andwherein the polyester resin has a degree of crystallization prior to being formed into a can body of 10% or smaller.