JPH11216811A - Translucent laminate and packaging bag using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve suitability for a molding machine by using inexpensive material by laminating a glassine paper on a printed layer of a first transparent plastic film, laminating a second transparent plastic film thereon, and laminating a heat sealable resin layer thereon through an adhesive between each layers. SOLUTION: A glassine paper 4 is laminated on a printed layer 3 of a biaxially oriented polypropylene film 1 (40 μm thickness) having the printed layer 3 of letter/pattern or the like on one side, and a partial adhering varnish layer 2 on the other side, a biaxially oriented polypropylene film 5 (20 μm thickness) is laminated further thereon through an adhesive, and a heat sealing resin layer 6 is laminated thereon through an adhesive. An adhering process for each layer is performed by a dry lamination method, and a nerve of the laminate can be controlled so as to meet molding machine maker's requirement, specification or the like. A roughly fan-like shape is formed so that the adhering varnish layer 2 is positioned on one end, the other end superposes, and the superposed portion is heat sealed to obtain a packaging bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a translucent laminate for packaging cone-shaped ice cream in a cone shape, and a packaging bag using the same.

[0002]

2. Description of the Related Art Today, a very large variety of cone-shaped ice creams have been marketed, but these are ice creams in cones such as wafers (grain flour kneaded with water or the like). And topped with granular chocolate, colored confectionery confectionery, etc., and the corn portion is popular because it can be eaten in whole, including the heat insulation.

[0003] These conventional cone-shaped ice creams
In many cases, the packaging bag has been individually packaged in an opaque packaging bag with a photograph of the contents on the surface, and the packaging bag has a layer configuration of (ink / aluminum foil / Paper / polyethylene film) was common. The main reason that opaque laminates (packaging bags) containing aluminum foil, paper, etc. have been used for conventional packaging is to improve the suitability of the molding machine (waist strength, etc.) based on the special shape of the items to be packaged. For. By incorporating aluminum foil, paper, and the like as components in the lamination, sufficient suitability for a molding machine (such as waist strength) has been ensured in the laminate. By the way, it was very disappointing that various topping materials with beautiful colors could not be seen from the outside by using an opaque packaging bag like a conventional package.

[0004] Transparent laminates using a transparent plastic film have been rarely used for conventional packaging bags, but these are generally stiff and have no suitability for a molding machine. It was the actual situation that both ends of the fan-shaped punched blank were overlapped and bonded by hand to form a cone. That is, when transparency was required in conventional packaging bags, mass production was impossible.

[0005] Here, the suitability of a laminate for a molding machine is generally considered to be its major factors such as its stiffness, curl prevention, and feeder suitability (prevention of electrostatic adhesion).

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the prior art, and uses a relatively inexpensive material, has good molding machine suitability, and has an opaque packaging bag.
An object of the present invention is to provide a translucent laminate having an effect which cannot be obtained in any case with a transparent packaging bag, and a packaging bag using the same.

[0007]

According to the first aspect of the present invention, there is provided a first transparent substrate having a printed layer of characters and pictures on one side and a partial adhesive varnish layer on the other side. A glassine paper is laminated on the printing layer of the plastic film via an adhesive, a second transparent plastic film is laminated on the glassine paper via an adhesive, and an adhesive is laminated on the second transparent plastic film. A heat-sealing resin layer is interposed therebetween to provide a semi-transparent laminate.

The invention according to claim 2 is the translucent laminate according to claim 1, wherein the second transparent plastic film also has a printing layer.

According to a third aspect of the present invention, the first and second transparent plastic films are biaxially oriented polypropylene films, and the heat-sealable resin layer is a multilayer film mainly composed of polyethylene and polypropylene. The translucent laminate according to claim 1 or 2.

According to a fourth aspect of the present invention, there is provided the translucent laminate according to the first, second, or third aspect, wherein the bonding method between the respective layers is a dry lamination method.

According to a fifth aspect of the present invention, there is provided an adhesive varnish applied to the semi-transparent laminate according to the first, second, third, or fourth aspect of the present invention. A packaging bag, which is punched in a substantially sector shape so that the layer is located at one end, and the other end is superimposed on the adhesive varnish layer and heat-sealed using the substantially sector blank.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. FIG. 1 is a schematic cross-sectional view of the translucent laminate of the present invention. FIG. 2 is a schematic plan view of the substantially fan-shaped blank in the packaging bag manufacturing process of the present invention. FIG. 3 is a schematic plan view of the packaging bag of the present invention. FIG. 4 is a schematic view showing the opening order of the packaging bag of the present invention. (A), (b), (c) and (d) show the opening order, (a) shows the unopened state, and (b)
Shows a state in which the upper seal portion is opened, and the upper one is pulled up from the upper edge to the knob portion at the overlapping and bonding end portion, and (c) further raises the knob portion by using the lower notch thereof, Similarly, the other end also shows a state where it is pulled up by using the notch. (D) shows a state where the packaged bag is completely lifted up from the both ends, and after all, the packaging bag is thrown away and the packaged object is completely exposed. Show. 1 to 4
1, 1 is a first transparent plastic film, 2 is an adhesive varnish layer, 3 is a printing layer, 4 is glassine paper, 5 is a second transparent plastic film, 6 is a heat-sealing resin layer, 7 is a knob, 8 Denotes a notch, 9 denotes a heat seal portion, 10 denotes an upper seal portion, and 11 denotes an article to be packaged.

As the first transparent plastic film 1 and the second transparent plastic film 5, a polypropylene film is often selected in consideration of suitability for a molding machine and printing.

The adhesive varnish layer 2 is applied to secure a certain or more adhesive strength when bonding the substantially fan-shaped ends, and is usually applied from a necessary portion of the blank to immediately below the notch. .

The printing layer 3 is characterized in that the packaging bag of the present invention is translucent, so that only a limited portion is an opaque printing layer.

The glassine paper (a kind of thin paper) 4 has, as its properties, a certain degree of transparency and a strong waist strength for its thickness.

The heat-sealable resin layer 6 is for heat-sealing the laminated portion at the end and the upper seal portion. However, an unnecessarily high seal strength makes opening the seal difficult. Polyethylene films, polypropylene films and the like are often used.

The knob 7 is a round protruding portion provided in the middle of one end of the blank, and its lower portion is connected to a notch.

The notch 8 is a recess provided in the middle of both ends and below the knob portion, and is pulled up from here, and eventually breaks above the knob portion.

Here, the reason why the dry lamination method is adopted as the bonding method between the respective layers is that the waist strength of the laminate can be controlled in accordance with the molding machine manufacturer, specifications, and the like. Further, in order to adjust the waist strength of the laminated body, particularly when the waist is too strong, a substantial portion where the radius of curvature of the substantially fan-shaped blank becomes small may be killed by a large number of perforations. When the waist is somewhat weakened, the rebound is reduced and then applied to the molding machine, winding starts smoothly.

[0021]

EXAMPLES The packaging material of the present invention will be described in detail with reference to specific examples.

<Example 1> A biaxially oriented polypropylene film (40 μm in thickness) having a printed layer of characters and pictures on one side and a partial adhesive varnish layer on the other side
A glassine paper is laminated on the printed layer via an adhesive, a biaxially stretched polypropylene film (thickness: 20 μm) is laminated on the glassine paper via an adhesive, and the biaxially stretched polypropylene film (thickness: 20 μm) is laminated. ) "Differen 115T" as a heat-sealable resin layer via an adhesive
(Thickness of 45 μm, Dainippon Ink and Chemicals, Inc.
Was transposed to obtain a translucent laminate of the present invention. Here, the method of bonding between the layers was a dry lamination method.
Using the semi-transparent laminate of Example 1, each adhesive varnish layer applied here was punched out in a substantially sector shape so as to be located at one end, and using this approximately fan-shaped blank, other adhesive varnish layers were formed on the adhesive varnish layer. The ends were overlapped and heat-sealed to obtain a packaging bag.
The translucent laminate of the present invention obtained in Example 1 and the packaging bag using the same have sufficient transparency, waist strength, curl prevention, feeder suitability (electrostatic adhesion prevention), and openability,
Very good molding machine suitability was shown. (See Table 1)

<Comparative Example 1> A biaxially oriented polypropylene film (thickness: 30 μm) having a printed layer of characters and pictures on one side and a partial adhesive varnish layer on the other side
A biaxially oriented polypropylene film (thickness: 40 μm) is laminated on the printed layer via an adhesive, and “Differen 115T” (thickness) is laminated on the biaxially oriented polypropylene film (thickness: 40 μm) via an adhesive. 45 μm, manufactured by Dainippon Ink and Chemicals, Inc.) were laminated to obtain a transparent laminate. Using the transparent laminate of Comparative Example 1, each adhesive varnish layer applied here was punched out in a substantially sector shape so as to be located at one end, and the other end was formed on the adhesive varnish layer using this approximately sector blank. The parts were overlapped and heat-sealed to obtain a packaging bag. In the case of Comparative Example 1, since each layer is a transparent plastic film, although there is transparency, electrostatic adhesion occurs and feeder suitability at the feeder portion of the molding machine is insufficient, and the thickness is smaller than the thickness. Since the waist strength was weak and easily bent, the finish cut suitability after bonding was not sufficient.

<Comparative Example 2> A biaxially oriented polypropylene film (40 μm thick) having a printed layer for characters and pictures on one side and a partial adhesive varnish layer on the other side
The glassine paper is laminated on the printed layer of the above with an adhesive, and “Differen 115” is laminated on the glassine paper with an adhesive.
T "(having a thickness of 45 µm, manufactured by Dainippon Ink and Chemicals, Inc.) to obtain a translucent laminate. Comparative Example 2
Using a semi-transparent laminate of the above, each adhesive varnish layer applied here is punched out in a substantially sector shape so as to be located at one end, and the other end portion is formed on the adhesive varnish layer using this substantially sector blank. The sheets were overlapped and heat-sealed to obtain a packaging bag. Comparative Example 2
In the case of (1), electrostatic adhesion occurred and the suitability of the feeder at the feeder portion of the molding machine was insufficient, and the waist strength was weak and the suitability of the molding machine was not good.

<Comparative Example 3> A glassy paper having a partial adhesive varnish layer on one surface is provided with an adhesive on the surface opposite to the adhesive varnish layer, and printed on one surface with characters, pictures, etc. And a second biaxially stretched polypropylene film (thickness: 30 μm) is laminated on the printing layer via an adhesive, and the second biaxially stretched polypropylene film (thickness: 30 μm) is laminated on the printed layer. Polypropylene film (thickness 30μm)
Extrude and coat polyethylene resin (thickness 1
5 μm) to obtain a translucent laminate. Here, the method of bonding between the layers was a dry lamination method. Using the semi-transparent laminate of Comparative Example 3, each adhesive varnish layer applied here was punched out in a substantially sector shape so as to be positioned at one end, and using this approximately sector-shaped blank, other adhesive varnish layers were formed on the adhesive varnish layer. The ends were overlapped and heat-sealed to obtain a packaging bag. In Comparative Example 3, since the glassine paper was exposed on the surface, curl occurred here due to the absorption of moisture and the like, and both the curl prevention property and the feeder suitability (prevention of electrostatic adhesion) became insufficient. The suitability was not good.

Comparative Example 4 A biaxially oriented polypropylene film (40 μm thick) having a printed layer for characters and pictures on one side and a partial adhesive varnish layer on the other side
A glassine paper is laminated on the printed layer via an adhesive, a biaxially stretched polypropylene film (thickness: 20 μm) is laminated on the glassine paper via an adhesive, and the biaxially stretched polypropylene film (thickness: 20 μm) is laminated. ) Was extruded and coated with a polyethylene resin (thickness: 15 μm) to obtain a translucent laminate. Using the translucent laminate of Comparative Example 4,
Each adhesive varnish layer applied here is punched out in a substantially sector shape so as to be located at one end, and using this substantially sector blank, the other end is superimposed on the adhesive varnish layer and heat sealed to form a packaging bag. Obtained. In Comparative Example 4, since the inner surface was extruded and coated with a polyethylene resin, shrinkage occurred here,
Since the curling occurred, the curl preventing property was insufficient, and the suitability for the molding machine was not good.

Comparative Example 5 A biaxially oriented polypropylene film (40 μm thick) having a printed layer of characters and pictures on one side and a partial adhesive varnish layer on the other side
A glassine paper is laminated on the printed layer via an adhesive, a biaxially stretched polypropylene film (thickness: 20 μm) is laminated on the glassine paper via an adhesive, and the biaxially stretched polypropylene film (thickness: 20 μm) is laminated. ) Was laminated with a low-density polyethylene film via an adhesive to obtain a translucent laminate. Using the semi-transparent laminate of Comparative Example 5, each adhesive varnish layer applied here was punched out in a substantially sector shape so as to be located at one end, and using this approximately fan-shaped blank, other adhesive varnish layers were formed on the adhesive varnish layer. The ends were overlapped and heat-sealed to obtain a packaging bag. When a low-density polyethylene film was used, the adhesive strength of the upper heat-sealed portion was too strong, and the opening property was difficult.

Comparative Example 6 This is a basic structure of a conventional product, and is an opaque laminate composed of (ink / aluminum foil / paper / polyethylene film). By incorporating aluminum foil, paper, and the like as components during the lamination, good laminating machine suitability (such as waist strength) is ensured in the laminate.

As described above, translucency, waist strength, curl prevention, feeder suitability (prevention of electrostatic adhesion), and openability were evaluated for Example 1 and Comparative Examples 1 to 6, and the results are shown in Table 1.
Please refer to it. In terms of waist strength, it has been found that 17 g / 15 mm or more is required as a measure.

[0030]

[Table 1]

[0031]

The translucent laminate of the present invention and the packaging bag using the same are formed by laminating glassine paper having translucency and stiffness as important characteristics together with various transparent plastic films. It is the first thing that has been discovered, and it is not only excellent in molding machine suitability, but the red, yellow, blue, etc. colored sugar confectionery grains etc. that are dimly recognized by scattered light in the packaging bag are truly beautiful and I want to get it. This can be said to be a unique effect that cannot be obtained in any way with the opaque packaging bag and the transparent packaging bag.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a translucent laminate of the present invention.

FIG. 2 is a schematic plan view of a blank in a process of manufacturing a packaging bag according to the present invention.

FIG. 3 is a schematic plan view of a packaging bag of the present invention.

FIG. 4 is a schematic diagram showing an opening order of the packaging bag of the present invention. (A), (b), (c), (d) show the opening order, (a) shows the unopened state, (b) opens the upper seal part, ,
(C) shows a state in which the upper portion is pulled up from the upper edge to the knob portion, and the knob portion is further pulled up using the lower notch, and the other end portion is also pulled up using the notch portion. (D) shows a state in which the packaged object is completely exposed by pulling it up further from both ends and eventually discarding more than the grip portion of the packaging bag and leaving it away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... First transparent plastic film 2 ... Adhesive varnish layer 3 ... Printing layer 4 ... Glassine paper 5 ... Second transparent plastic film 6 ... Heat sealable resin layer 7 ... Knob part 8 ... Notch 9 ... Heat seal part 10 … Top seal part 11… Packaged material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B65D 65/40 B65D 65/40 A // B65D 85/78 B65D 85/78 B B29K 23:00 B29L 7:00 9:00

Claims (5)

[Claims] A first layer having a printing layer for characters and pictures on one side;
Then, glassine paper is laminated via an adhesive on the printed layer of the first transparent plastic film having a partial adhesive varnish layer on the other surface, and the second transparent plastic is laminated on the glassine paper via an adhesive. A translucent laminate, comprising: laminating a film; and laminating a heat-sealing resin layer on the second transparent plastic film via an adhesive. 2. The translucent laminate according to claim 1, wherein the second transparent plastic film also has a printing layer. 3. The method according to claim 1, wherein the first and second transparent plastic films are biaxially oriented polypropylene films, and the heat-sealable resin layer is a multilayer film mainly composed of polyethylene and polypropylene. 3. The translucent laminate according to 2. 4. The translucent laminate according to claim 1, wherein the bonding method between the layers is a dry lamination method. 5. The translucent laminate according to claim 1, 2 or 3, or 4,
Each adhesive varnish layer applied here was punched out in a substantially sector shape so as to be located at one end, and using this substantially sector blank, the other end was superimposed on the adhesive varnish layer and heat sealed. Bags for packaging.