Chuck tape and packaging bag with chuck tape

Abstract

A chuck tape easily and stably manufacturable, capable of developing excellent adhesive strength irrespective of the type of the sealant layer (innermost layer) of a base film forming a bag body, and having the excellent shapability of a clamping part in manufacturing the chuck tape and a packaging bag with the chuck tape. The chuck tape (1) comprises a male member (11) and a female member (12). Band-like base parts (13) forming the chuck tape (1) comprise seal parts (14) and base body parts (15). A resin forming the base body parts (15) has a melting point higher than that of a resin forming the seal parts (14), and the resin forming the seal parts (14) contains a metallocene-based straight chain low-density polyethylene with a density of 920 kg / m<3> or less and a melt flow rate of 5.0 g / 10 min. or less by 50 wt.% or more.

Description

technical field [0001] The present invention relates to an unsealable and resealable clamping band disposed at an opening of a bag body, and a packaging bag with the clamping band having the same. Background technique [0002] Generally, as a package for packaging various items such as food or medical products, a packaging bag with a clamping belt is used, and a pair of belt-shaped clamps formed by a male member and a female member and interlocked with each other are arranged relative to the opening of the bag. The tight band (engaging member) is set to be freely openable and closable in the engaged state. [0003] In addition, as a method of manufacturing a packaging bag with a clamping band that can freely implement the opening and closing of such an opening, the following method is generally widely used. The base film forming the part is heat-sealed to the clamping band. [0004] For the resin constituting such a clamp band, the same resin as the innermost layer of the ...

AI Technical Summary

Problems solved by technology

[0007] However, in the configuration of the conventional clamping tape, as described above, it is necessary to adjust the sealing layer according to the type of the sealant layer (innermost layer) of the base film constituting the bag body, which is a layer to be thermally welded to the clamping tape. The sealing part of the clamping tape is used separately. For example, when the sealing part of the clamping tape is made of polyethylene, if the sealant layer of the bag body is made of polyethylene resin, heat sealing can be performed well, but in this sealant Difficult to heat seal when layer is polypropylene

[0008] In addition, in the clamp band having a structure in which the resin constituting the occlusal part and the resin of the sealing part shown in Patent Document 1 are formed of different resins, there is another problem, that is, the shapeability of the clamp band during manufacture. Even after molding, the molding stability is poor, and the shape of the occlusal part may be out of shape.

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