| 摘要 |
PROBLEM TO BE SOLVED: To provide a fitting implement which is equipped with a low heat-seal temperature, a high bag-making speed, fitting implement strength and heat resistance, and which can also adapt to a bag making machine and a bag-making filling sealing machine, wherein a zipper is arranged in a direction crossing a film moving direction. SOLUTION: This fitting implement is a pair of strip fitting implements which have a tape part and a pawl part and which can be fitted into each other. The tape part has a multilayered structure with two layers or more, which include a base layer and a seal part layer. The base layer comprises a resin composition (A) which is mainly composed of a polyethylene copolymer with a density of 900-940 kg/m<SP>3</SP>and a melt flow rate of 0.5-15 g/10 min. The seal part layer comprises a resin composition (B) containing an ethylene-αolefin copolymer with a density of 850-920 kg/m<SP>3</SP>and a melt flow rate of 0.5-15 g/10 min. In the fitting implement, the density satisfies the condition: (A)≥(B), and the base layer includes an additive (C) with a melting peak temperature higher than that of the resin composition (A) by 5°C or higher. COPYRIGHT: (C)2004,JPO&NCIPI
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