JP2508059Y2 - Heat shrinkable packaging bag with label - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a heat-shrinkable packaging bag with a label. In particular, the present invention relates to a tubular laterally long packaging bag such as ham in which a label is attached near the center of the bag body.

[Prior Art] Conventionally, when packaging a tubular or prismatic oblong product, a label indicating the product name, quality description, trademark, etc. is attached to the center of the product, that is, the center of the bag body. Is usually provided.

However, like a ham packaging bag, after heat sterilization after packaging and heat-shrinking the bag body film, the wrapping can be done by simply sticking a thick sheet to the bag body, However, there is a defect that the appearance is deteriorated due to the oblique deformation and wrinkles.

Therefore, it is necessary to attach a label after packaging, or to use a labor-intensive method of once packaging and then doubly packaging in a thick labeled bag.

[Problems to be Solved by the Invention] An object of the present invention is to provide a packaging bag in which the label sheet attached to the central portion of the bag body does not deform or wrinkle due to heat shrinkage during packaging. Is.

[Means for Solving the Problems] The present inventor forms a label in which a thin plastic film is laminated on a thick plastic sheet, and uses this thin film layer made of the same material as the bag body film, The present invention has been made with the idea of attaching the bag by partially fusing it with the bag body film.

That is, according to the present invention, in a packaging bag in which the bag portion is composed of a single-layer or multi-layer heat-shrinkable plastic film 3, a thick label sheet 1 is provided with a film 2 of the same resin as the surface of the bag portion film 3. A label characterized in that a laminated sheet laminated so as to protrude from a side edge is fixed to a bag body film by fusing homogeneous films between the protruding portion 5 from the label side edge and the surface of the bag body film 3 And a heat-shrinkable packaging bag.

The heat-shrinkable film for the bag portion used in the present invention shows a shrinkage of 5% or more after being treated in hot water for 5 minutes, and is made of a thin continuous sheet of heat-shrinkable plastic film.
It is possible to use one obtained by polymerizing one sheet or one obtained by half-folding one continuous sheet.

The non-heat-shrinkable film made of the same resin as the surface of the bag body film used in the present invention means a film having a heat shrinkage of 5% or less in a treatment in hot water for 5 minutes.

When used as a packaging bag for oxygen barrier heat sterilization treatment, the heat-shrinkable film is made of polyamide resin,
A multilayer film in which a film having an oxygen barrier property such as a saponified ethylene-vinyl acetate copolymer resin or a vinylidene chloride resin and a film having a heat sealing property are laminated can be preferably used.

Further, when used for packaging ham or the like, since it is boiled for a long time in the heat sterilization step, it is preferable to use a heat-resistant resin film such as a polyester resin or polyamide resin laminated on the outside. Further, it is preferable to use a modified polyolefin resin film interposed between the laminated layers in order to ensure the adhesion of these multi-layered films.

 The present invention will be described in more detail with reference to the drawings of the embodiments.

A thick label sheet 1 which is another raw material used in the present invention is a thick plastic sheet or a paper sheet, and a laminated label sheet piece in which a thin film 2 having the same surface as the bag body is laminated on one side or both sides. Can be preferably used.

The lamination of the thin plastic film 2 is performed by making the widths of both sides slightly larger than the width of the core material of the thick label sheet 1 and the film portions 5 protruding to both sides from the lamination portion are glued to the heat seal 4 with the bag body film. It needs to be a substitute part. Without this protruding portion 5, the heat-sealing process for providing the label cannot be smoothly performed. Further, the protruding portion 5 of the present invention can be provided only on one side edge of the label, or can be provided on the three side edges or the entire circumference, and the entire circumference can be fused. However, in the normal case, it is convenient to provide them on the two opposite sides.

The laminated label sheet having these thin plastic films 2 is arranged such that the surfaces of the bag body film and the surface of the label sheet are fused so that the films of the same quality are fused, and both edges of the same film protruding from the label sheet. Heat seal 4 is applied to the portion, and the label laminated sheet is attached to the bag body portion.

In the present invention, the thin plastic film 2 laminated on the label sheet needs to be made of the same resin as the surface of the film of the bag body. Here, homogeneous resin means
Those having similar chemical compositions of high-molecular monomer units and capable of obtaining fusion-bonding firm enough by the heat-sealing process are included in the same range.

When the film of the bag body is a multi-layer film, the material of this resin needs to be the same as the material of the surface film to which the label is attached. If this material is different, the strength of the fusion-bonded portion due to the heat-sealing process becomes weak and the label falls off.

When a thin film is laminated on the label sheet, it is usually laminated with an adhesive. Since the material of the thin film is made to match the material of the surface resin layer of the bag body film, it is often different from the material of the label sheet, and therefore, it is often impossible to fuse by heat sealing.

In the present invention, a heat-shrinkable film is used for the bag portion. However, even if the label laminated film has the same resin as the resin, the heat-shrinking heating condition of the labeled packaging bag (processing in hot water for 5 minutes) is used. ), The one having a heat shrinkage of 5% or less is used.

If the label laminated film has a large heat shrinkability, the thick label sheet may be deformed during sterilization heating.

In the label laminated sheet used in the present invention, only the protruding portions on the opposite side edges are fused and the lower surface of the label is separated and separated from the bag body portion, so that the label is deformed by heat shrinkage of the bag body film. There is no such thing.

Characters or patterns are printed on this thick label laminated sheet. The printing can be applied to either the thick label sheet 1 or the laminated plastic film 2.

This product packaging bag can be used as a package by putting an item through the opening and performing deaeration, heat sealing, heat sterilization, heat shrinkage, etc., if desired.

[Advantage of the Invention] In the packaging bag with the label sheet of the present invention, the label does not deform when heat-shrinked and is attached with a neat appearance, so the label display of the product is attached in advance in the bag manufacturing process. There is an advantage that it can be done and it does not take time.

[Brief description of drawings]

FIG. 1 is a plan view of a product packaging bag according to an embodiment of the present invention,
2 is a longitudinal sectional view, FIG. 3 is a sectional view showing a laminated structure of a label laminated sheet, and FIG. 4 is a view showing another laminated structure of a label laminated sheet. Reference numerals in the figure are 1; thick label sheet, 2; thin label laminated film, 3; bag body heat-shrinkable plastic film, 4;
Label sheet side edge fusion-bonded seal portion, 5; Label side edge protruding portion.

Claims (1)

(57) [Scope of utility model registration request] 1. A packaging bag comprising a single-layer or multi-layer heat-shrinkable plastic film 3 as a bag part, wherein a thick label sheet 1 is provided with a non-heat-shrinkable film 2 of the same resin as the surface of the bag part film 3. The laminated sheet laminated so as to protrude from the side edge of the label is fixed to the bag body film by fusing the same film with the protruding portion 5 from the label side edge and the surface of the bag body film 3 A heat shrinkable packaging bag with a label.