| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer composition capable of being used as an easily unsealable seal material which can especially seal polypropylene at low temperature in a proper sealing strength, is little in the temperature dependency of the sealing strength, and does not largely change the sealing strength, even when subjected to a boiling treatment. SOLUTION: This polymer composition comprising (B) 5 to 30 pts.wt. of poly-1-butene, (C) 1 to 20 pts.wt. of a tackifier and (A) 60 to 90 pts.wt. of an ethylene polymer component selected from (A1) an ethylene-unsaturated ester copolymer having an unsaturated ester content of 3 to 15 wt.% and (A2) a mixture component comprising the ethylene-unsaturated ester copolymer having the unsaturated ester content of 3 to 15 wt.% and low density polyethylene in an amount of not more than the equivalent weight and having an unsaturated ester content of 3 to 15 wt.%, and the use of the polymer composition as an easily unsealable seal material.
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