Patent ID: 6858676
Filing Date: 2005-02-22
Classification: C08F,C08L,C09J

Abstract:
1. An olefin derived copolymer satisfying the following requirements (1) and (2): (1) strength at breakage of the olefin derived copolymer measured according to JIS K6251 is not more than 2.0 MPa, and (2) a resin composition consisting of the olefin derived copolymer and a polypropylene derived resin, which resin contains a 20° C. xylene-soluble part in an amount of not more than 20% by weight, satisfies the following expressions, (expression 1) and (expression 2), wherein R[3/5] and R[2/6] are multiple correlation coefficients of a primary straight line obtained by a method consisting of the steps of: (i) plotting a content by weight (Pa) of the olefin derived copolymer contained in the resin composition as a horizontal axis, and plotting an elongation at breakage, EB (%) measured according to JIS K6251, of the resin composition as a vertical axis to obtain a curve, (ii) quintic multiple-regressing the above-obtained curve to obtain a multiple regression formula, which formula essentially contains data of at least seven Pa points, Pa=0.00, 0.20, 0.30, 0.40, 0.50, 0.60 and 0.70, and further in case of containing more than seven Pa points, all the Pa values essentially have mutually constant intervals of not more than 0.10; and (iii) approximating a multiple regression curve in the sectional regions of Pa=0.30-0.50 and Pa=0.20-0.60 of the above-obtained multiple regression formula according to a method of least square to obtain the above-mentioned primary straight line and wherein S[2/6] is a gradient of a primary straight line (formula) obtained by approximating the above-mentioned multiple regression curve in the sectional region of Pa=0.20-0.60 according to a method of least square.