JPS6335969Y2 - - Google Patents

Description

[Detailed description of the invention] This invention applies coating or double-sided tape to a sealing piece that can open and close the bag opening of an envelope or synthetic resin bag, or to a bag membrane that overlaps and joins the sealing pieces. The present invention relates to a packaging bag in which a release tape is coated and adhered to the surface of the pressure-sensitive adhesive formed by the above process.

Conventionally, in this type of bag, a release tape having release properties or having been subjected to release treatment has been coated and adhered to a pressure-sensitive adhesive surface. However, this release tape generates static electricity when it is unrolled during bag making or when it is peeled off from the pressure-sensitive adhesive surface, and this static electricity can damage the bag making machine, the bag, and people. The tape adheres to clothing and the like, impairing workability and becoming a nuisance, making it extremely difficult to handle.

The present invention was developed to overcome these drawbacks. One side of the release tape is vapor-deposited with aluminum, the other side is used as a release surface, and the release surface is applied to the pressure-sensitive adhesive surface formed on the bag. An example of its implementation will be described with reference to the drawings.The bag A has a form and structure well known in this technical field, and has a protruding sealing piece 2 for opening and closing the bag opening 1. In order to fold the sealing piece 2 overlappingly and bond it to the bag membrane a, a pressure-sensitive adhesive surface 3 of a predetermined width is provided on the sealing piece 2 or the bag membrane a to which it is bonded, and the pressure-sensitive adhesive is applied. The release tape B is coated and adhered to the agent surface 3. In this case, the bag opening 1 may be located at the top or bottom of the bag A, and the pressure-sensitive adhesive surface 3 may be applied directly with pressure-sensitive adhesive or pressure-sensitive on both sides. A so-called double-sided adhesive tape coated with adhesive is applied to form a pressure-sensitive adhesive surface. It is possible to make the width narrower, to make the width the same, or to use one coated with a pressure-sensitive adhesive that adheres more firmly to one side than the other. Therefore, the shapes of the bag A and the pressure-sensitive adhesive 3 are not limited to those shown in the drawings.

The release tape B is made by applying aluminum vapor deposition on one side of the tape base b and using the other side as a release surface, and the release surface is coated and bonded to the pressure-sensitive adhesive surface 3 applied or formed on the bag body A. do. The tape material b is preferably one that has fusing properties, does not weld when cut, has weak welding properties, or is difficult to weld, for example, is made of synthetic resin tape, and the tape material b If the mold itself does not have mold releasability, one side is subjected to a so-called mold release treatment using silicon or Teflon to form a mold release surface 4, and the other side is subjected to aluminum vapor deposition to provide an aluminum vapor deposition surface 5. It is something. Further, when the tape base b itself has mold releasability, either the front or back surface thereof is used as the mold release surface 4, and the other surface is provided with the aluminum vapor deposited surface 5.

The aluminum vapor-deposited surface 5 is formed by vapor-depositing aluminum powder or aluminum foil on one side of the tape base b. The aluminum vapor-deposited surface 5 may be formed on the entire surface of one side of the tape base b, or may be formed partially or in the form of one or several lines.

The release surface 4 of the release tape B having the aluminum vapor-deposited surface 5 formed thereon is coated and adhered to the pressure-sensitive adhesive 3 surface of the bag A.

In this invention, the release surface of a release tape with an aluminum vapor-deposited surface on one side is coated and adhered to the surface of a pressure-sensitive adhesive coated or formed over a predetermined width on the bag body, so that the release tape can be peeled off. Since no static electricity is generated during the process, the release tape does not stick to people's clothes or bodies, the bag after peeling, other tapes, trash cans, etc., which makes the peeling process easier and does not get in the way. It is easy to handle and does not deteriorate the surrounding environment. Further, the same applies to bag making, and the bag making work becomes smooth.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the packaging bag of the present invention. Fig. 1 is a front view with a part cut away, and Fig. 2 is an enlarged cross-sectional view of the main part. In the mold tape, b is the tape base, 3 is the pressure sensitive adhesive, 4 is the mold release surface, and 5 is the aluminum vapor deposition surface.

Claims (1)

[Scope of utility model registration request] For packaging, a release tape is coated with aluminum vapor-deposited on one side of the tape material and the other side is used as a release surface, and is coated and adhered to the surface of a pressure-sensitive adhesive that is applied or formed over a predetermined width on the bag body. bag.