JP2002285133A - Adhesive structure and cosmetic container equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily separate members and to effectively use them as resources by a divided recovery of a product assembled with two kind of members made of different materials with an adhesive layer. SOLUTION: This cosmetic container is formed by combining a lid 5 of the container made of a synthetic resin with a mirror 6 unitedly installed to the lid 5 and fixing the lid 5 and the mirror 6 through an adhesive structure 1. The adhesive structure 1 is equipped with a base layer 1a and adhesive layers 1b holding the base layer 1a from both sides. At least one of the adhesive layers 1b is composed of a water-soluble resin and a polymeric water absorber is blended into at least one of the base layer 1a and the adhesive layer 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a plastic,
Regarding an adhesive structure that interconnects different materials such as mirrors, glass or metal materials, and a cosmetic container provided with this adhesive structure, two dissimilar members can be mutually displaced by a simple method when disposed after use. The purpose is to realize reliable separation and collection.

[0002]

2. Description of the Related Art As a combination of two dissimilar members, a hand mirror in which a mirror is bonded to a plastic housing, a compact cosmetic container using a metal plate as a decoration, or a case for storing lipstick, etc. Is known, and many other household and household items are found.

[0003] These materials are usually fixed with a double-sided tape having a pressure-sensitive adhesive layer on both sides of a base material or a hot melt.

[0004] In recent years, from the viewpoint of effective utilization of resources, as the demand for separation and collection has increased, for example, a cosmetic body in which a container body made of a synthetic resin and a foreign material such as a mirror or glass are fixed to each other. In such a case, it is necessary to separate and dispose the foreign members from each other, and in this case, it is difficult to remove them from each other. In order to address this problem, a fixing method using a double-sided tape using a water-soluble adhesive has been used. However, even in this case, when the adhesion between the members is high, there is a problem that the permeability of water is poor and the separation takes time.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel combination in which two members made of different materials are bonded to each other with a double-sided tape or the like so that each member can be easily separated and separated and collected. An object of the present invention is to propose an adhesive structure and a cosmetic container provided with the adhesive structure.

[0006]

For this purpose, an adhesive structure according to a first aspect of the present invention is an adhesive structure that is disposed between two members made of different materials and fixed to each other,
The adhesive structure includes a base layer and an adhesive layer sandwiching the base layer on both sides, and at least one of the adhesive layers is formed of a water-soluble resin, and at least one of the base layer and the adhesive layer. It is characterized in that a polymer water-absorbing material is blended in one layer.

According to a second aspect of the present invention, in the first aspect, the layer in which the polymer water-absorbing material is blended is
The polymer absorbent is added to the resin constituting the layer in an amount of 3 to 6
It is preferable that they are blended at a ratio of 0 vol%.

The adhesive structure according to a third aspect of the present invention is the adhesive structure according to the first or second aspect, wherein the polymer water-absorbing material is a starch-polyacrylonitrile hydrolyzate, a starch-polyacrylate crosslinked product, a carboxymethylcellulose-based material,
It is preferably a saponified vinyl acetate-methyl acrylate copolymer, an isobutylene maleic anhydride copolymer, or a crosslinked sodium polyacrylate.

In a fourth aspect of the present invention, in the adhesive structure according to any one of the first to third aspects, it is preferable that the water-soluble resin is mainly composed of polyvinyl alcohol.

A fifth invention is a cosmetic container which is a combination of a synthetic resin container main body for accommodating a cosmetic and a foreign member such as a mirror integrally attached to the container main body,
The container body and the foreign member are fixed to each other via an adhesive structure, and the adhesive structure includes a base layer and an adhesive layer sandwiching the base layer on both sides, and at least one of the adhesive layers Are made of a water-soluble resin, and at least one of the base layer and the adhesive layer is blended with a polymer absorbent.

[0011] In the cosmetic container according to a sixth aspect, in the fifth aspect, the layer in which the polymer water-absorbing material is blended is:
The polymer absorbent is added to the resin constituting the layer in an amount of 3 to 6
It is preferable that they are blended at a ratio of 0 vol%.

A cosmetic container according to a seventh aspect of the present invention is the cosmetic container according to the fifth or sixth aspect, wherein the polymer absorbent is a starch-polyacrylonitrile hydrolyzate, a starch-polyacrylate crosslinked product, a carboxymethylcellulose-based material. Saponified vinyl acetate-methyl acrylate copolymer,
It is preferably an isobutylene maleic anhydride copolymer or a crosslinked product of sodium polyacrylate.

According to an eighth aspect of the present invention, in the cosmetic container according to any one of the fifth to seventh aspects, it is preferable that the water-soluble resin contains polyvinyl alcohol as a main component.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings.

FIG. 1 is a perspective view schematically showing a first embodiment of an adhesive structure according to the present invention, taking a case of two members made of different materials and a metal plate attached to the case as an example. It is.

In FIG. 1, reference numeral 1 denotes an adhesive structure, reference numeral 2 denotes a metal plate as a foreign material, and reference numeral 3 denotes a housing made of a synthetic resin such as plastic for fixing the metal plate 2. The adhesive structure 1 includes a base layer 1a and an adhesive layer 1b sandwiching the base layer 1a on both sides, and both or one of the adhesive layers 1b is formed of a water-soluble adhesive layer.

The base layer 1a may be made of a material that does not penetrate water at all, but is preferably a porous material, a sponge material, a nonwoven fabric or a cloth that easily penetrates water. In this case, when the cosmetic container is put in water and the metal plate 2 is pressed a plurality of times, water permeates not only the adhesive layer 1b of the adhesive structure 1 but also the base layer 1a, and the adhesive layer 1b Dissolves in a relatively short time.

The water-soluble adhesive layer 1b is obtained by blending a water-soluble resin and a polymer water-absorbing material. Here, as the water-soluble resin, for example, PVA (polyvinyl alcohol) may be mentioned, but the component is not particularly limited as long as it is a water-soluble resin. The polymer absorbent is composed of a polymer electrolyte having a large number of hydrophilic groups in the molecule. Examples include saponified methyl copolymers, isobutylene maleic anhydride copolymers, and crosslinked sodium polyacrylate. In particular, the water-soluble adhesive layer 1b does not impair the adhesiveness.
It is preferable to blend the polymer water-absorbent at a ratio of 3 to 60 vol% to the water-soluble resin.

By arranging the metal plate 2 on the housing 3 with the adhesive structure 1 interposed therebetween, the metal plate 2 is firmly fixed to the housing 3.

To remove the metal plate 2 from the housing 3, an appropriate amount of water is applied to the adhesive structure 1, or the adhesive structure 1 itself is immersed in water.

Then, when water permeates into the adhesive layer 1b, the water-soluble resin gradually dissolves and the metal plate 2
The adhesive force between the metal plate 2 and the housing 3 is weakened, and the polymer water absorbing body expands due to water absorption to push up the metal plate 2 from the housing 3, so that the metal plate 2 and the housing 3 can be easily separated.

FIG. 2 is an external perspective view of a container body of the cosmetic container according to the present invention, and FIG. 3 is a sectional view showing a main part of the cosmetic container of FIG.

As shown in FIG. 2, the container body can be made of a synthetic resin, and is connected to a storage portion 4 for storing cosmetics via a hinge so as to be swingable. The cover 5 is formed. Reference numeral 6 denotes the lid 5
Mirror is a foreign member shown in the example arranged on the back of
The mirror 6 is firmly fixed to the lid 5 by the adhesive structure 1 as shown in FIG.

In the cosmetic container having the configuration as shown in FIG. 2, the cosmetic container is separated and discarded.
In order to remove the mirror 6 from the lid 5, an appropriate amount of water is applied to the adhesive structure 1, or the adhesive structure 1 itself is immersed in water.

Then, when the water permeates into the adhesive layer 1b, the adhesive layer 1b gradually dissolves and the adhesive force between the lid 5 and the mirror 6 is weakened. The lid 5 and the mirror 6
And will be easily separated.

FIG. 4 is a cross-sectional view of an essential part when another embodiment of the adhesive structure is adopted in FIG. 3, and as shown in FIG. Insert molding, etc.), and the mirror 6 can be disposed on the base layer 1a via an adhesive layer 1b in which a water-soluble resin and a polymer water-absorbing material are blended. In this case as well, the base layer 1a may be made of a material that does not penetrate water at all. However, it is preferable to use a material having high water absorption or use a water-soluble paper or the like. Further, when the base layer 1a is a resin layer, the adhesive layer is not blended with a polymer water-absorbing material, but the base layer 1a is blended with a polymer water-absorbing material.
Alternatively, it is also possible to blend a polymer absorbent into both the base layer and the adhesive layer, and in this case, the same effect as described above can be obtained.

In the present invention, the adhesive structure 1 is used as the base layer 1a.
Although the present invention has been described using a single-layer film as an example, the present invention is not limited to this, and the embodiment can be appropriately changed to a laminated film or the like.

[0028]

According to the present invention, in an adhesive structure which is disposed between two members made of different materials and fixes them together, and in a cosmetic container provided with the adhesive structure, the adhesive layer is made of a water-soluble resin. As well as being composed, the polymer absorbent is blended in at least one of the base layer and the adhesive layer, so that it can be easily separated, so that it is possible to reliably separate and collect different types of members. In addition to effective utilization of resources, waste disposal becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an adhesive structure according to the present invention.

FIG. 2 is an external perspective view of a container body of the cosmetic container according to the present invention.

FIG. 3 is a sectional view showing a main part of the cosmetic container according to the embodiment.

FIG. 4 is a cross-sectional view of a main part when another embodiment of the adhesive structure is used for a cosmetic container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Adhesion structure 1a Base layer 1b Adhesive layer blended with water-soluble resin and polymer water absorber 2 Metal plate 3 Housing 4 Storage unit 5 Lid (container main body) 6 Mirror

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) C09J 7/02 C09J 7/02 Z 101/00 101/00 103/00 103/00 129/04 129/04 133/00 133/00 135/00 135/00 F-term (reference) 4F100 AJ06A AJ06C AJ07A AJ07C AK01A AK01B AK01C AK21B AK22A AK22C AK25A AK25C AK70A AK70C AL01A AL01C AL05A AL05C AL06A AL06J ATBBABBCB CB01BA05B05B10A AA08 AB01 CB01 CB02 CB04 EA05 FA08 4J040 BA082 BA102 DA142 DD011 DE022 DF012 DF042 DF082 DG022 KA09 LA11 MA02 MA05 MA10 PA23 PA42

Claims (8)

[Claims] 1. An adhesive structure which is disposed between two members made of different materials and fixes them together, said adhesive structure comprising a base layer and an adhesive layer sandwiching said base layer on both sides, At least one of the pressure-sensitive adhesive layers is formed of a water-soluble resin, and at least one of the base layer and the pressure-sensitive adhesive layer is blended with a polymer absorbent. Structure. 2. The layer in which the polymer water-absorbing material is blended is formed by adding the polymer water-absorbing material to the resin constituting the layer.
The bonded structure according to claim 1, wherein the bonded structure is blended at a ratio of ６０60 vol%. 3. The polymer water-absorbing material includes starch-polyacrylonitrile hydrolyzate, starch-polyacrylate crosslinked product, carboxymethylcellulose, vinyl acetate-methyl acrylate copolymer saponified product, and isobutylene maleic anhydride. The adhesive structure according to claim 1, wherein the adhesive structure is a polymer or a crosslinked product of sodium polyacrylate. 4. The adhesive structure according to claim 1, wherein the water-soluble resin is mainly composed of polyvinyl alcohol. 5. A cosmetic container which is a combination of a synthetic resin container main body for accommodating a cosmetic and a foreign member such as a mirror integrally attached to the container main body, wherein the container main body and the foreign material The member is fixed via an adhesive structure, and the adhesive structure includes a base layer and an adhesive layer sandwiching the base layer on both sides, and at least one of the adhesive layers is
A cosmetic container comprising a water-soluble resin and a polymer absorbent blended in at least one of a base layer and an adhesive layer. 6. The layer in which the polymer water-absorbent material is blended, wherein the polymer water-absorbent material is mixed with the resin constituting the layer.
The cosmetic container according to claim 5, wherein the cosmetic container is blended at a ratio of ６０60 vol%. 7. The polymer water-absorbing material may be a starch-polyacrylonitrile hydrolyzate, a starch-polyacrylate crosslinked product, a carboxymethylcellulose type, a saponified vinyl acetate-methyl acrylate copolymer, or isobutylene maleic anhydride. The cosmetic container according to claim 5, which is a polymer or a crosslinked product of sodium polyacrylate. 8. The cosmetic container according to claim 5, wherein the water-soluble resin contains polyvinyl alcohol as a main component.