JP2002362616A - Laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate which can be easily checked for opened seal state and cannot be reused. SOLUTION: This laminate is characterized in that the same is comprised of a multi layer structure including an extended layer having a pattern formed in it and a non extended layer, the non extended layer is laminated and formed on the extended layer, the layer is pulled in a direction parallel with the layer and extended, the non extended layer is broken and divided into several non extended broken pieces, and the pattern on the extended layer hidden by the non extended layer can be seen through clearances of the non extended layer broken pieces. This laminate described above for use in confirming the opened seal is characterized in that the member is adhered to an adherend, it is extended in a direction parallel with the layer at the time of seal opening and seal peeling operations, the non extended layer is broken into several non extended broken pieces and further the pattern of the non extended layer hidden by the non extended layer before seal opening and seal peeling operations can be seen through clearances of the non extended layer broken pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate, and more particularly to an improvement in a constituent material thereof.

[0002]

2. Description of the Related Art In recent years, in order to obtain a sense of security for consumers, the necessity of preventing foreign substances from entering pharmaceuticals, cosmetics, foodstuffs, and the like and ensuring the safety of products has been increasing. Conventionally, various packaging methods have been devised in order to prevent foreign substances from being mixed, for example, by attaching a laminate to the exterior of a product so that the presence or absence of opening can be determined at a glance. As a conventional general laminate, a laminate as shown in FIG. 7A is known. The laminate 100 shown in the figure has a multilayer structure including an adhesive layer 112, a release layer 114, and a base layer 116,
A release layer 114 is formed in a pattern on the surface of the adhesive layer 112,
The base layer 116 is laminated on the adhesive layer 112 with the release layer 114 interposed therebetween. Also, the release layer 114 and the base material layer 1
16, the adhesive strength between the adhesive layer 112 and the adherend 130 is stronger than the adhesive strength between the release layer 114 and the adhesive layer 112. Therefore, when the laminate is to be peeled, the peeling layer 114 is separated from the adhesive layer 112, and a pattern emerges on the base material layer 116 (FIG. 7B). Therefore, the base material layer 116
The presence or absence of the opening can be confirmed by the appearance of the pattern on the opening.

[0003]

However, in the conventional laminate, the adhesive layer 112 remains on the adherend 130 at the time of opening and peeling, and the appearance of the adherend is impaired. In addition, the adhesive layer 1
Since the release layer 114 is formed on the substrate 12, it tends to flow over time, and the appearance of the pattern on the base material layer 116 may be unclear. Further, at the time of opening peeling, the release layer 1
Although it was assumed that 14 was separated from the adhesive layer 112, it could be integrally peeled off by weakening the adhesive strength of the adhesive layer by using a solvent or heating. Since the shape is maintained after opening and peeling, it can be reused, and if it is attached again, it will be in the same state as before opening and peeling, and there is a problem in that it is difficult to confirm the presence or absence of opening. There has been a demand for a laminate that can prevent mixing.

[0004] The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a laminate that can be easily checked for opening and cannot be reused.

[0005]

In view of the above problems, the inventors of the present invention have made intensive studies, and have found that a stretched layer having a pattern formed thereon,
A laminate having a multilayer structure including a non-stretched layer is stretched by pulling in a direction parallel to the layer, and the pattern appears on the surface due to the destruction of the non-stretched layer accompanying stretching, which is suitable for various purposes such as opening confirmation. And found that the present invention was completed.

A first subject of the present invention is to have a multilayer structure including a stretched layer on which a pattern is formed, and a non-stretched layer, wherein the stretched layer is formed by laminating a non-stretched layer, and is parallel to the layer. While stretching by pulling in the direction, the non-stretched layer is destroyed, splits into a number of non-stretched layer fragments, and the pattern of the stretched layer hidden by the non-stretched layer can be seen from the gap between the non-stretched layer fragments. It is a laminate characterized by becoming. In the laminate, the non-stretched layer is preferably a metal foil layer. In the laminate, it is preferable that a pattern is formed on the surface of the non-stretched layer.

In the laminate, the pattern formed on the surface of the non-stretched layer is preferably a hologram or an optical diffraction recording. In the laminate, the stretched layer preferably has elasticity. In the laminate, the stretched layer preferably has plasticity.

In the laminate, it is preferable to laminate an adhesive layer on the stretched layer side. In the laminate, it is preferable to increase the mechanical strength of the laminate by laminating a protective layer on the non-stretched layer side.

[0009] A second subject of the present invention is that the laminated body is used by being attached to an adherend, and is stretched in a direction parallel to the layer at the time of opening and peeling. It is a laminate for opening confirmation, wherein the laminate is divided into layer fragments, and the pattern of the stretched layer hidden by the non-stretched layer before opening and peeling becomes visible from the gap between the non-stretched layer fragments. In the laminate, the protective layer is laminated on the non-stretched layer side to increase the mechanical strength of the laminate, to prevent stretching at the time of sticking, and to be stretched by separating the protective layer from the non-stretched layer at the time of unsealing. It is suitable.

In the laminate, it is preferable to laminate a protective layer on the non-stretched layer to increase the mechanical strength of the laminate, prevent stretching at the time of sticking, remove the protective layer after sticking, and stretch at the time of opening and peeling. It is.

In the present invention, "stretching" means extending in a plane parallel to the layer as shown in FIG. In the present invention, the elongation percentage means the percentage of the ratio between the elongation generated between the reference points on the test piece and the original reference point distance when pulled by a force of 1 N / cm. Further, in the present invention, elasticity is defined as the case where the deformation rate when the tensile tension is removed after stretching in the tensile direction is less than 5%, and plasticity is defined when the deformation rate is 5% or more.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION As an example of a laminate in the present invention, a laminate for confirming opening will be described in detail, but the scope of the present invention is not limited to this. The laminate is
It is used by sticking to the opened part of a product or the like using the adhesive force of the adhesive layer. In order to open the product or the like, it is necessary to peel off the laminate, but since the laminate has a stretched layer, when the laminate is to be peeled off after being attached to the product or the like, it is stretched in the tensile direction (FIG. 1). . Therefore, by using the laminate of the present invention, anyone can easily determine whether or not the product to which the laminate is attached has been opened. Hereinafter, preferred embodiments of the present invention will be described.

The laminate 10 of the present invention has a multilayer structure in which a stretched layer 14 on which a pattern 16 is formed is laminated on the adhesive layer 12, and a non-stretched layer 18 is laminated on the stretched layer 14. FIG. 2 (a)). Because of having the stretched layer 14, it is stretched in the tensile direction at the time of peeling from the adherend 30 (FIG. 1), and the non-stretched layer 18 is destroyed and split into a number of non-stretched layer fragments. 2 can be seen from the gaps of the non-stretched layer 18 fragments (FIG. 2).
(b)). That is, the pattern 16 which was hidden by the non-stretched layer 18 and was not visible before the peeling-off of the unstretched layer 18 appears on the surface as a result of the destruction of the non-stretched layer 18 (FIG. 3). Leads to prevention.

[0014]Non-stretched layer  In the present invention, the non-stretched layer is formed by vertical stripes by stretching the laminate.
It is broken into cracks. The material used for the non-stretched layer is
It has no stretchability and can hide the pattern formed on the stretched layer
It is not particularly limited as long as it can be broken at the time of peeling
However, a metal foil or the like is preferably used. In addition, it is modeled on the non-stretched layer.
The shape can be formed to enhance the design. How to form it
Various methods such as printing are also possible and there is no particular limitation.
And a light diffraction recording material. Holog
The ram or optical diffraction recording is obtained by a conventionally known method.
be able to. With holograms, you can get a three-dimensional effect
It is possible to obtain a pearl luster effect with an optical diffraction recording medium.
Wear. The non-stretched layer may have a single structure or a multilayer structure.

[0015]Stretched layer  The stretched layer used for the laminate in the present invention has stretchability
So it does not break when peeled off
Stretch. The pattern formed on the stretched layer is
Is hidden by the non-stretched layer,
Appears on the surface due to the breaking of the stretched layer, making it easy to confirm opening
it can. The stretchability is plastic or elastic.
Good, but when used for opening confirmation, it is especially plastic.
Preferably. When stretchability is plastic, open
Since the laminate does not return to its original length even after release, the non-stretched layer fragments
Gaps do not close, making it easy to see the appearance of patterns
No.

The elongation percentage of the stretched layer is preferably from 20 to 500%, and most preferably from 50 to 200%. If it is 20% or less, the non-stretched layer is not sufficiently destroyed, and the pattern is unlikely to appear on the surface. If it is 500% or more, handling is difficult. As the stretched layer, polyurethane resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyvinylidene chloride resin, silicone resin and the like can be used.
Among these resins, polyurethane resins are preferred.
The stretched layer may have a single structure or a multilayer structure. If necessary, a curing agent may be added to adjust the strength and elongation. The stretched layer can be colored by adding a pigment, a dye, or the like to the resin used as the stretched layer.

The pattern formed on the stretched layer generally refers to a pattern that can be visually appealed, and may or may not have a specific meaning in terms of contents.
It may be for design, appearance decoration, or information transmission. Such patterns include, for example, images of characters, numbers, symbols, figures, patterns, copy-forgery-inhibited patterns, and the like.

[0018]Adhesive layer  The adhesive layer plays a role of attaching the laminate to the adherend. Book
In the invention, as the adhesive layer, acrylic, rubber or the like
General adhesives can be widely used. Also sticky
When attaching to an adherend, an adhesive layer is not always necessary.
No. Also, to protect the surface of the adhesive layer,
It is preferable to laminate release paper. In the present invention,
For paper release, silicone resin, wax, paraffin
Are coated on paper or base material such as film.
It is.

[0019]Protective layer  In order to protect the surface of the laminate in the present invention, non-stretched
A protective layer 22 may be laminated on the surface of the layer 18 (see FIG.
4). The protective layer protects the surface of the laminate and
It works to increase the mechanical strength of the body. The material of the protective layer
Polyvinyl chloride, polyester, polycarbonate
G, acrylic resin, urethane resin, etc.
it can. The thickness of the protective layer is 10-200 μm, especially 38-
Preferably it is 50 μm. If it is thinner than 10μm
The mechanical strength of the laminate is not sufficiently increased. In addition, confirmation of opening
When used as an approved laminate or the like by being attached to an adherend, 20
If it is thicker than 0 μm, only the protective layer will separate during application.
U. Protective layer should be removed or left after application
Can also.

When the protective layer is removed after the application, stretching of the laminate at the time of application can be prevented, and at the time of peeling from the adherend, the stretching of the laminate is preferably not hindered. The adhesive strength between the protective layer and the non-stretched layer is preferably 0.01 to 0.5 N / cm, particularly preferably 0.04 to 0.3 N / cm.
If it is less than 0.01 N / cm, the protective layer will be separated at the time of sticking, and if it is more than 0.5 N / cm, it will be difficult to remove the protective layer after sticking and will damage the surface of the laminate.

When the protective layer is left even after the application, the protective layer 22 is separated from the non-stretched layer 18 at the time of peeling so as not to hinder the elongation in the tensile direction at the time of peeling from the adherend (FIG. 5), the adhesive strength between the adherend 30 and the adhesive layer 12 is
It is preferable to adjust the adhesive strength between the protective layer 22 and the non-stretched layer 18 so as to be stronger. When the adhesive force is adjusted, the stretching of the laminate can be prevented at the time of sticking, and the protective layer 22 is separated from the non-stretched layer 18 at the time of peeling from the adherend, which is preferable because the stretching of the laminate is not hindered. Specifically, the adhesive strength between the adherend and the adhesive layer is 1 to 10 N / cm, and the adhesive strength between the protective layer and the non-stretched layer is 0.01 to 0.5 N / cm, particularly 0.0
It is preferable to set it to 4 to 0.3 N / cm. In this case, the protective layer is preferably made of a material having high transparency.

The laminate of the present invention can be prepared as follows. A resin is applied to the release paper 20 using an applicator and dried to form a stretched layer 14, and a pattern 16 such as a character or a picture is formed on the surface of the stretched layer 14 (FIG. 6A). Next, the non-stretched layer 18 is laminated on the stretched layer 14 (FIG. 6B). At this time, the protective layer 22 can be laminated on the non-stretched layer 18 (FIG. 6C). Thereafter, the release paper 20 is peeled off, an adhesive is applied to the stretched layer 14 side, and dried to form the adhesive layer 12 (FIG. 6).
(D)). Further, a release paper 20 is attached to protect the adhesive surface of the adhesive layer 12 (FIG. 6E).

Since the laminate of the present invention uses a stretched layer, sufficient adhesion is exhibited even on a curved surface or the like where adhesion was difficult. The shape of the laminate of the present invention is not particularly limited, but when used as a laminate, is stretched by an appropriate force, the non-stretched layer is broken, separated into a number of non-stretched layer fragments, and the non-stretched layer is separated. Since it is necessary for the pattern to appear from the gaps between the fragments, the shape in which the effect of the present laminate is easily exerted is appropriately selected according to the shape of the container or the like to be applied, for example, a circular shape, an elliptical shape, a strip shape , Polygons and the like.

The laminate of the present invention is made of high quality paper or art paper by selecting an appropriate material and forming each layer in consideration of adhesiveness, heat resistance, weather resistance, chemical resistance and the like depending on the product used. General printing such as mirror coated paper, Japanese paper, rough paper, E-stage, UV printing, UV varnish, UV coated paper, press coating, various kinds of laminated paper such as PVC, PP, PET, etc., and soft, hard, foamed Vinyl such as vinyl, ABS, AS, HiPS, AC, PP, PET
It can be used for various kinds of materials such as plastics, bookbinding, albums, T-shirts, cloth products, etc., leather, glass, metal, and woodwork. The materials to which the present invention can be applied are not limited to those listed here.

[0025]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples.
Although described, the scope of the invention is limited to these examples.
Never.Example 1  Using an applicator on the release paper,
Fat (Nipporan 5196) ^TM: Nippon Polyurethane Industry
Co., Ltd.) was applied to a coating thickness of 200 μm. At room temperature
And dried for 12 hours.
I got a sheet. Acrylic resin (RC-10^TM: Uni Kasei Co., Ltd.) 70
Part, pearl pigment (Privale G-GR^TM： Shiseidosha
30 parts) and 50 parts of ion-exchanged water are mixed and screened.
Marking "opened" on polyurethane sheet by printing
Printed. This is dried at 80 ° C. for 10 minutes to form letters.
Was. Transfer hologram on the polyurethane sheet surface of the character printing surface
And heat roller stretching
Stretching process at 140 ° C using a heating machine.
The ram was transcribed. After that, release the release paper once and apply the adhesive to the polyurethane surface.
Adhesive (1549^TM: Three Bond Co.) applied thickness 10
It was applied so as to have a thickness of 0 μm. Dry at 50 ° C for 20 minutes
Was performed, and a release paper was again adhered to the adhesive surface. The product obtained
The hologram image appears on the surface of the layered body, and it is beautiful in design.
Met. Also, after peeling after attaching to the adherend, `` open
The word "Done" appeared on the surface, making it easy to confirm opening.

[0026]

By using the laminate of the present invention, it is possible to easily confirm the opening of the laminate and obtain a laminate that cannot be reused.

[Brief description of the drawings]

FIG. 1 is an explanatory view when a laminate according to the present invention is peeled off.

FIG. 2 is an explanatory diagram of a laminate according to the present invention.

FIG. 3 is an explanatory view at the time of peeling a laminate according to the present invention.

FIG. 4 is an explanatory diagram of a laminate in which a protective layer according to the present invention is laminated.

FIG. 5 is an explanatory view when a laminate in which a protective layer according to the present invention is laminated is peeled off.

FIG. 6 is an explanatory diagram of a method for producing a laminate according to the present invention.

FIG. 7 is an explanatory view of a conventional laminate.

[Description of Signs] 10 laminated body 12 adhesive layer 14 stretched layer 16 pattern 18 non-stretched layer 20 release paper 22 protective layer 30 adherend

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsuyoshi Miyamoto 2-2-1 Hayabuchi, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture Inside Shiseido Research Center (Shin-Yokohama) (72) Inventor Tetsuyuki Osawa Tsuzuki, Yokohama-shi, Kanagawa 2-2-1 Hayabuchi-ku, Shiseido Research Center Co., Ltd. (Shin-Yokohama) (72) Inventor Asa Kimura 2-2-1 Hayabuchi, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture Shiseido Research Center (Shin-Yokohama) F term (reference) 3E086 AB01 AC33 AC34 BA04 BA13 BA15 BB66 BB90 CA01 CA28 4F100 AB01B AB33B AK51 AT00C BA02 BA03 BA07 BA10A BA10B BA10C GB90 JK01C JK07A JK08A JK08B

Claims (11)

[Claims] A non-stretched layer is formed by laminating a non-stretched layer on a stretched layer, and is stretched by pulling in a direction parallel to the layer. A laminate in which the non-stretched layer is broken, split into a number of non-stretched layer fragments, and the pattern of the stretched layer hidden by the non-stretched layer becomes visible from the gaps in the non-stretched layer fragments. . 2. The laminate according to claim 1, wherein the non-stretched layer is a metal foil layer. 3. The laminate according to claim 1, wherein
A laminate, wherein a pattern is formed on the surface of the non-stretched layer. 4. The laminate according to claim 3, wherein the pattern formed on the surface of the non-stretched layer is a hologram or an optical diffraction recording. 5. The laminate according to claim 1, wherein the stretched layer has elasticity. 6. The laminate according to claim 1, wherein the stretched layer has plasticity. 7. The laminate according to any one of claims 1 to 6, wherein an adhesive layer is laminated on the stretched layer side. 8. The laminate according to claim 1, wherein a protective layer is laminated on the non-stretched layer side to increase the mechanical strength of the laminate. 9. The laminate according to any one of claims 1 to 7, wherein the laminate is used by being adhered to an adherend, stretched in a direction parallel to the layer at the time of opening and peeling, and the non-stretched layer is broken. Wherein the pattern of the stretched layer, which has been hidden by the non-stretched layer before opening and peeling, becomes visible from the gap between the non-stretched layer fragments. 10. The laminate according to claim 9, wherein a protective layer is laminated on the non-stretched layer side to increase the mechanical strength of the laminate, prevent stretching at the time of sticking, and ensure that the protective layer is not stretched at the time of opening and peeling. A laminate for opening confirmation, which is stretched by being separated from the laminate. 11. The laminate according to claim 9, wherein a protective layer is laminated on the non-stretched layer to increase the mechanical strength of the laminate, prevent stretching during sticking, remove the protective layer after sticking, and open the package. A laminate for opening confirmation, which is stretched at the time of peeling.