| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap liner material composition having a high heat resistance and impact resistance, excellent sealability, good cap openability and being safe in terms of food sanitation. SOLUTION: This cap liner material composition comprises (I) 20-97 wt.% of a polyolefin resin, (II) 80-3 wt.% of a hydrogenated dienic polymer, and (III) a 8-22C higher fatty acid amide in an amount of 0.01-1 pt.wt. per 100 pts.wt. of the total amount of the component I and the component II. The hydrogenated dienic polymer II is obtained by hydrogenating >=90 mol.% of the butadiene portions of a linear or branched block copolymer expressed by the block structure: A-(B-A)n or (A-B)m [(n) is >=1; (m)is >=2] and comprising (A) polybutadiene block segments having a vinyl bond content of >=20 mol.% in the conjugated diene portion, and (B) block segments comprising polybutadiene or a vinyl aromatic compound-butadiene copolymer and having a vinyl bond content of 25-95 mol.% in the conjugated diene portion. |
