JPH05278134A - Production of multilayered resin film having printing pattern layer incorporated therein - Google Patents

Abstract

PURPOSE:To throw a printing pattern layer laminating process and a hot melt resin film laminating process into one process by a method wherein a printing pattern layer and an adhesive layer are provided to the single surface of a multilayered resin film formed by the co-extrusion of resin films in such a state that a release resin layer is interposed between the resin films to be taken up to be bonded to the film under pressure and one of the resin films is released from the release resin layer in such a state that the printing pattern layer is interposed between the films. CONSTITUTION:Multilayered resin films 10, 11, 12 wherein a release resin layer 10 having a printing pattern layer 21 and an adhesive layer 22 provided to the surface thereof is interposed are taken up to be bonded. The outermost resin film 11 of the taken-up multilayered resin films 10, 11, 12 is released from the release resin layer 10 and cut by one round quantity of taking-up to be removed. That is, by interposing the release resin layer between the multilayered resin films molded by co-extrusion, the release of the multilayered resin films becomes possible and a conventional process releasing the outermost resin film of the taken-up multilayered resin films from the release resin layer to laminate a hot-melt resin film is not required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a multilayer resin film containing a printed pattern layer for a bag-shaped flexible packaging material such as confectionery and foods.

[0002]

2. Description of the Related Art Conventionally, as a bag-shaped flexible packaging material for confectionery, foods, etc., a printed pattern layer and a heat-fusible resin film are sequentially laminated on the back surface of a transparent cellophane or resin film. The heat-sealed bag-shaped flexible packaging material is widely used, and from the hygienic point of view, a printed pattern layer is internally provided between layers such as a resin film for isolation. It is a thing.

Conventionally, as a cylindrical flexible packaging material for hams, sausages, etc., a printed picture layer is sequentially adhered to one surface of a resin film obtained by laminating two self-adhesive polyvinylidene chloride films. An agent layer is provided and wound up and pressure-bonded, the layers of the two laminated resin films are overcome by self-adhesiveness to be peeled off, and a two-layer resin film containing a print pattern layer is drawn out to form a tube. A tubular soft packaging material that is heat-sealed in a circular shape is used.

[0004]

With the recent diversification of tastes such as confectionery and foods, and sophistication, even bag-like flexible packaging materials have gas barrier property, aroma retaining property, low adsorption property, etc. In response to the request, the multilayer resin film is being used more and more. On the other hand, due to the progress of molding technology such as tandem extrusion molding method and coextrusion molding method, even in a complicated combination of multilayer resin films, film forming (or laminating) can be performed with few steps of almost 1 to 2 steps. Is.

However, in a bag-shaped flexible packaging material such as confectionery and foods, from the above-mentioned hygienic point of view, a method of instituting a printed pattern layer between layers such as a resin film and isolating it is described in the above two sheets. There is no suitable method other than the method of utilizing the self-adhesiveness of the stacked resin films, and two steps, that is, a step of providing a printed pattern layer and a step of laminating a heat-fusible resin film, are absolutely necessary. However, the present invention shortens the above two steps to one step by incorporating a peeling resin layer between the layers of the coextrusion-molded multilayer resin film.

[0006]

MEANS FOR SOLVING THE PROBLEMS The present invention comprises a step of coextruding a multilayer resin film with a resin layer for peeling between layers of the resin film, and a surface of one side of the molded multilayer resin film, Having a step of providing a print pattern layer and an adhesive layer in order and winding and press-bonding, and a step of peeling and pulling out the rolled multi-layer resin film from the peeling resin layer with the print pattern layer being included therein. According to the present invention, there is provided a method for manufacturing a multilayer resin film having a printed pattern layer therein, which has a reduced number of steps.

The peeling resin layer of the present invention, which is present between the layers of the resin film, has a weak adhesive affinity with a heat-fusible resin film such as polyethylene, which constitutes a multilayer resin film, and is of a polyester type or a polyamide type. , Using an appropriate resin material such as acrylic, polyvinyl chloride,
A small amount of an appropriate release agent such as a silicone resin is added, and at the same time when the multilayer resin film is coextruded, a release resin layer having a layer thickness of 3 to 10 μm is provided between the resin film layers by a coextrusion method.

Regarding the step of coextrusion molding the above-mentioned multilayer resin film having the peeling resin layer therein, the bag barrier soft packaging material is required to have gas barrier property, aroma retaining property and low adsorption property. Depending on the appropriate resin material, such as polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyester, ethylene vinyl acetate copolymer, ionomer, etc., using the equipment of T die casting method or inflation method, 2 to 5 layers of the multilayer resin film having the peeling resin layer therein are coextruded and molded.

Regarding the step of sequentially providing a print pattern layer and an adhesive layer on one surface of the molded multilayer resin film of the present invention and winding and press-bonding the same, a usual bag-shaped flexible packaging material is printed. The process is the same as that of the process, and for example, by a gravure printing method, an appropriate pattern printing ink and an adhesive varnish on the entire surface are used to print a print pattern layer and an adhesive layer in order, winding, and pressure bonding.

In the step of peeling and pulling out the rolled multi-layer resin film of the present invention from the peeling resin layer with the print pattern layer incorporated therein, the self-adhesive property of the conventional two-layer resin film is utilized. The method is similar to that of FIG.
As shown in FIG. 1, a multilayer resin film (11, 10, 12) having a printed pattern layer (21) and an adhesive layer (22) provided on the surface and wound up is shown in FIG.
As shown in (b), the outermost resin film (11, the printed pattern layer (21) and the adhesive layer (22) are provided) is a peeling resin layer
Peel from (10), cut and remove one winding round,
As shown in FIG. 1 (c), the printed pattern layer (21) and the adhesive layer (22)
A multilayer resin film (10, 12, 11) containing and is peeled off from the peeling resin layer (10) and pulled out, and undergoes a bag-making process such as the next step, and is soft like a bag of confectionery or food. The packaging material is completed.

[0011]

According to the present invention, the multi-layer resin film can be peeled by incorporating the peeling resin layer between the layers of the co-extrusion-molded multi-layer resin film. As shown in FIG. 1 (b), The outermost resin film (11) of the wound multilayer resin film (11, 10, 12) is peeled from the peeling resin layer (10),
By cutting and removing one winding round, the conventional process of laminating a heat-fusible resin film or the like is not required, and the process is shortened to form a printed pattern layer between the layers of the multilayer resin film. It can be made internal.

[0012]

EXAMPLE FIG. 1 is a cross-sectional explanatory view showing a method for producing a multilayer resin film having a printed pattern layer therein in an example of the present invention. That is, FIG. 1 (a) shows a multilayer resin film (11, 10, 12) in which a peeling resin layer (10) is internally provided with a printed pattern layer (21) and an adhesive layer (22) on the surface. Fig. 1 (b) shows a state in which the rolled multi-layer resin film (11, 10, 12) is wound and pressure-bonded.
Fig. 1 (c) shows a state in which 1) is peeled from the peeling resin layer (10) and one winding round is cut and removed.
Shows a state in which the multilayer resin film (10, 12, 11) containing the print pattern layer (21) and the adhesive layer (22) is peeled off from the peeling resin layer (10) and pulled out. is there.

Regarding the multilayer resin film (11, 10, 12) having the peeling resin layer (10) in the present embodiment, the heat-fusible resin film (11) on the inner surface of the bag-shaped soft packaging material is used. ) As an ordinary linear low-density polyethylene film 30 μm, and as a resin layer (10) for peeling between layers, a silicone resin of about 1% by weight.
Ordinary polyester (PET) film 1 with 5 μm of contained polyester (PET) layer as the resin film (12) on the surface
5 μm was coextruded and molded by an ordinary three-layer T die casting method, and the surface of the molded multi-layer resin film (11, 10, 12) on the linear low density polyethylene film (11) side was sequentially The printed pattern layer (21) and the adhesive layer (22) are provided by an ordinary gravure printing method, wound, and pressed.

Next, the rolled multi-layer resin film (11,
The outermost layer of (10, 12), the linear low-density polyethylene film (11) provided with the printed pattern layer (21) and the adhesive layer (22) is peeled from the peeling resin layer (10) and wound. After cutting and removing one round of the above, as shown in FIG. 1 (c), a multilayer resin film (10, 12, 11) in which a printed pattern layer (21) and an adhesive layer (22) are incorporated
The, peeling from the peeling resin layer (10) and made into a three-sided sealing packaging bag, the peeling from the peeling resin layer (10) of the multilayer resin film (10, 12, 11) is easy, Polyester (P
ET) film (12) side of the peeling resin layer (10) left on the surface of the three-sided sealing packaging bag acts to prevent the heat-sealing device (heat-seal bar) from becoming dirty, and also the three-sided sealing packaging bag. The inner surface of the linear low-density polyethylene film (11) also has a good heat-sealing property, and is suitable for a bag-shaped flexible packaging material, a multilayer resin film containing a printed pattern layer (21) (10, 12, 11) was obtained.

[0015]

As described above, according to the method for producing a multilayer resin film having a printed pattern layer of the present invention, as shown in Examples, it is suitable for bag-shaped flexible packaging materials such as confectionery and foods, It is possible to obtain a multilayer resin film having a printed pattern layer therein.

That is, according to the present invention, the multi-layer resin film can be peeled by incorporating the peeling resin layer between the layers of the co-extrusion-molded multi-layer resin film, as shown in FIG. 1 (b). , Rolled multi-layer resin film (11,10,
By peeling the outermost resin film (11) of 12) from the peeling resin layer (10) and cutting and removing one winding round, a conventional heat-fusible resin film or the like is laminated. The printing pattern layer can be incorporated between the layers of the multilayer resin film by shortening the step without the step of performing.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a method for producing a multilayer resin film having a printed pattern layer therein, in an example of the present invention.

[Explanation of symbols]

10 ... Resin layer for peeling 11 ... Resin film, linear low-density polyethylene film 12 ... Resin film, polyester (PET) film 21 ... Printing pattern layer 22 ... Adhesive layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B32B 31/18 7141-4F B65D 65/16 9028-3E // B29L 9:00 4F

Claims (1)

[Claims] 1. A step of coextruding a multi-layer resin film, wherein a peeling resin layer is internally provided between layers of the resin film,
A step of sequentially providing a print pattern layer and an adhesive layer on one surface of the molded multi-layer resin film and winding and press-bonding the multi-layer resin film. A method for producing a multilayer resin film having a printed pattern layer therein, which comprises a step of peeling off from the resin layer and drawing it out.