JPH04324485A - Sticking material - Google Patents

Abstract

PURPOSE:To obtain a sticking material capable of properly and temporarily hiding the surface of a material to be stuck without subjecting the surface to releasing treatment and hardly curling the material to be stuck at the time of sticking even when a thermally adhesive resin is used as an adhesive by fitting a specified thermally adhesive resin layer and adhesion blocking parts formed on the surface of the thermally adhesive resin layer. CONSTITUTION:A hiding layer 18 is formed on one principal face of a base material 16 and a thermally adhesive resin layer 22 made of a thermally adhesive resin having delayed tacky property is formed on the surface of the hiding layer 18. Adhesion blocking parts 24 for reducing the adhesive strength of the thermally adhesive resin layer 22 is formed on the surface of the layer 22 in a dispersed state by printing or coating with a resin having no adhesive property when the layer 22 is melted by heating or a resin having adhesive property at a higher temp. than the thermally adhesive resin.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to an adhesive material, which is applied to an object such as a postcard to hide information such as confidential information during mailing, so that an authorized recipient can receive the information as appropriate. You can view information regarding adhesive materials.

0002

2. Description of the Related Art FIG. 11 is a sectional view showing a conventional adhesive material. This adhesive material 1 includes a sheet-like base material 2. A concealing layer 3 is formed on the main surface of the base material 2 . A laminate layer 4 made of polyethylene is formed on the surface of this hiding layer 3. Furthermore, an adhesive layer 5 made of a pressure-sensitive adhesive is formed on the surface of the laminate layer 4. A release paper 6 is temporarily attached to the main surface of the adhesive layer 5.

0003

[Problem to be Solved by the Invention] With such conventional adhesive materials, if it is applied to the surface of the material to be pasted, the surface of the material to be pasted can be hidden, but the surface of the material to be pasted can be hidden. There were cases in which mistakes were made in pasting onto the material to be pasted.

[0004] In order to solve this problem, an adhesive material using a thermoadhesive resin as an adhesive has been developed. After confirming the positions of the adhesive material and the material to be adhered, such an adhesive material is adhered to the material by melting the heat-adhesive resin layer. Therefore, when the adhesive material is applied to the material to be adhered, it is difficult to make an adhesion error.

However, when such an adhesive material is attached to a target material, the target material is also heated when the thermoadhesive resin layer is heated, causing the target material to curl. There were cases where it was put away.

[0006] Furthermore, a laminate formed in such a way that a part of it, for example, the part inside the frame, can be peeled off,
Dry glue is applied over the entire surface of the paper to form an adhesive surface, and the other base material is subjected to a release process such as silicone processing so that only the area within the frame can be removed. There is a need to allow one laminate of a laminate structure to be partially peeled off by treatment. Therefore, when manufacturing them, one laminate requires a dry glue application process, and the other laminate requires a peeling process such as silicon processing.
Inevitably, the structure of the laminate becomes more complicated, and the number of manufacturing steps increases, leading to an increase in manufacturing costs.

[0007] Therefore, the main object of the present invention is to be able to suitably and temporarily hide the surface of an adhered material without subjecting the surface of the adhered material to any processing such as peeling treatment, and to It is an object of the present invention to provide an adhesive material in which a material to be adhered does not easily curl even when a thermoadhesive resin is used as an agent.

[0008]

[Means for Solving the Problems] The present invention comprises a base material and a delayed tack thermal adhesive resin formed on one main surface of the base material, and is used for pasting the base material to an object to be pasted. An adhesive material comprising a thermoadhesive resin layer and adhesion inhibiting parts that are formed in a dispersed manner on the surface of the thermoadhesive resin layer and partially reduce the adhesive force of the thermoadhesive resin layer. .

[0009]

[Function] Since the thermoadhesive resin layer is formed of a delayed tack thermoadhesive resin layer, the adhesive material can be heated and then applied to the material to be adhered.

[0010] Furthermore, the surface of the adhesive material to be adhered to the object to be adhered is divided into a part where the heat-adhesive resin layer is exposed as it is and an adhesion inhibiting part for reducing the adhesive strength of the heat-adhesive resin layer. Because of this, when heated and attached to an object,
The exposed portion of the thermoadhesive resin layer is strongly adhered to the object to be adhered, and the portion where the adhesion inhibiting portion is formed is weakly adhered to the object to be adhered.

[0011]

Effects of the Invention According to the present invention, since strongly bonded portions and weakly bonded portions coexist on the surface of the bonding material to be bonded to the object, the bonding material can be removed from the weakly bonded portions. can be peeled off relatively easily from the object to which it is attached. Therefore, if you attach this adhesive to a postcard, for example,
Various information formed on the main surface of the postcard mount is hidden during mailing, and the recipient can easily see the information.

Furthermore, if this adhesive material is used, there is a strongly adhered portion on the surface of the adhesive material to the postcard mount, so that the adhesive material will not be accidentally peeled off from the postcard mount.

[0013] By heating and bonding the adhesive material to the postcard mount without any processing on the side of the object to be affixed, such as the postcard mount, it is possible to obtain a postcard that hides written information. When manufacturing postcards, it is sufficient to simply heat-process them, and the range of use thereof is wide.

Moreover, when manufacturing such postcards, it is only necessary to process the adhesive material and there is no need to process the postcard mount, so the manufacturing process can be simplified, and the postcard The device for applying the adhesive material used in manufacturing can be easily simplified.

[0015] Furthermore, even if a thermoadhesive resin is used as an adhesive in the adhesive material, the material to be adhered is unlikely to curl during pasting.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0017]

[Example] The present invention relates to an adhesive material that is applied to the surface of a material to be adhered, such as a postcard mount. I will explain about it.

1 and 2 show a postcard which is an embodiment of the present invention, FIG. 1 is a perspective view thereof, and FIG. 2 is a sectional view of a main part of FIG. 1.

This postcard 10 includes a postcard mount 12 formed to the size of an official postcard. On the back side of the postcard mount 12, confidential information 12a, such as bank deposit balance, is formed. Furthermore, an adhesive material 14 is attached to the back side of the postcard mount 12.

[0020] This adhesive material 14 includes a sheet-like base material 16. The base material 16 is made of a relatively flexible material such as paper or synthetic resin film that can be cut with scissors or the like.

A concealing layer 18 is formed on one main surface of the base material 16. The hiding layer 18 is formed, for example, by solid silver printing using silver ink, or by laminating film materials having hiding power such as aluminum foil with an adhesive or the like.

On the surface of the concealing layer 18, a drawing line forming portion 20 is formed by, for example, drawing a lottery with characters such as winning, losing, etc., or other printing.

Furthermore, the surface of the hiding layer 18 is coated with a thermally adhesive resin having delayed tack properties by extrusion while heating, or by dissolving it in a solvent or dispersing it in water, and printing such as gravure or silk screen. By doing so, a thermal adhesive resin layer 22 is formed.

[0024] This thermal adhesive resin layer 22 has, for example, 10
It is formed so that it melts at a temperature of 0° C. to 200° C. and can be adhered to a postcard mount 12 made of paper, for example.

[0025] The thermoadhesive resin has delayed tack properties and basically consists of a polymer and a solid plasticizer,
It preferably contains a tackifier, and may further contain an anti-aging agent and other additives.

Examples of polymers include polyvinyl acetate, polybutyl methacrylate, vinyl chloride-vinylidene chloride copolymer, synthetic rubber, vinyl acetate-2-ethylhexyl allylate copolymer, vinyl acetate-ethylene copolymer, vinylpyrrolidone-styrene copolymer. , styrene-butadiene copolymer, vinylpyrrolidone-ethyl acrylate copolymer, etc. can be selected.

Solid plasticizers include crystallized plasticizers and amorphous plasticizers. Crystallized solid plasticizers do not have tackiness. On the other hand, amorphous solid plasticizers have adhesive properties.

Such solid plasticizers include dicyclohexyl ortho-phthalate, diphenyl ortho-phthalate, dihexyl ortho-phthalate, dihydroabiethyl ortho-phthalate, dimethyl isophthalate, sterulose benzoate, ethylene glycol dibenzoate, Trimethylolethane tribenzoate, glyceride tribenzoate, pentaerythritol tetrabenzoate, sterulose octaacetate, tricyclohexyl citrate, N-cyclohexyl-p-toluenesulfonamide, dehydroabiethylamine carbonate, methoxyethyl-urea stearate There are complexes, etc.

Examples of the tackifier include indene resin, ethyl cellulose, petroleum resin (hydrocarbon resin), terpene resin, and rosin derivatives (polymerized rosin, hydrogenated rosin, pentaerythritol ester of rosin, resin acid dimer), and the like.

[0030] On the surface of the heat-adhesive resin layer 22, there is an adhesion inhibiting part 24 for reducing the adhesion force of the heat-adhesive resin layer 22.
are formed in a dispersed manner. In this embodiment, the adhesion inhibiting portions 24 are formed vertically and horizontally on the surface of the heat-adhesive resin layer 22 in the form of, for example, 150 lines per inch. Note that the adhesion inhibiting portion 24 may be formed in a linear shape only vertically or only horizontally on the surface of the heat-adhesive resin layer 22.

The adhesion inhibiting portion 24 is made of a resin selected from, for example, a resin that does not have adhesive properties when the heat-adhesive resin layer 22 is heated and melted, or a heat-adhesive resin that forms the heat-adhesive resin layer 22. It is formed by appropriately selecting a resin that has adhesive properties only at a higher temperature than the resin, and printing and coating it.

For example, an ultraviolet curable ink can be selected, and this ultraviolet curable ink is composed of a coloring agent, a prepolymer, a monomer, a photoinitiator, a sensitizer, and an additive. Examples of the prepolymer include epoxy acrylate, polyol acrylate, polyester acrylate, polyether acrylate, unsaturated polyester, cationic polymerizable resin, melamine acrylate, unsaturated polybutadiene, drying oil acrylate, and silicone acrylate.

Monomers include monofunctional acrylates such as 2-ethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and 2-hydroxyethyl methacrylate, 1,3-butanediol diacrylate, and 1,4-butanediol. diacrylate, 1,6-hexanediol diacrylate,
Diethylene glycol diacrylate, neopentyl glycol diacrylate, polyethylene glycol #4
00 diacrylate, hydroxy bivalic acid ester neobenzyl glycol diacrylate, diethylene glycol dimethacrylate, polyethylene glycol #2
Difunctional acrylates such as 00 dimethacrylate, polyfunctional acrylates such as trimethylolpropane triacrylate, pentaerythritol triacrylate, trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, tetramethylolmethane tetraacrylate, dipentaerythritol hexaacrylate, etc. can give. Furthermore, vinyl ethers, itaconic acid esters, N-vinylpyrrolidone are also used.

Photoinitiators include biacetyl, acetophenone, benzophenone, Michler's ketone, benzyl,
Benzoin, benzoin isobutyl ether, benzyl dimethyl ketal, tetramethylthiuram sulfide,
Azobisisobutylnitrile, benzoyl peroxide, 1-hydroxycyclohexylphenyl ketone, α
-Hydroxyisobutylphenone, p-isopropyl-
Examples include α-hydroxyisobutylphenone, and benzophenone and its derivatives are particularly used.

As the sensitizer, aliphatic amines such as n-butylamine, di-n-butylamine, triethylamine, and diethylaminoethyl methacrylate, amines containing aromatic groups, nitrogen heterocyclic compounds such as piperidine, allyl series, O- Sulfur compounds such as tolylthiourea, sodium diethyldithiophosphate, soluble salts of aromatic sulfinic acids, phosphorus compounds such as N,N-disubstituted-p-aminobenzonitrile compounds, tri-n-butylphosphine, sodium diethylthiophosphate, etc. , Michler's ketone, N-nitrosohydroxylamine derivatives, nitrogen compounds such as oxazoline compounds, and chlorine compounds such as carbon tetrachloride and hexachloroethane.

[0036] Examples of additives include mist preventive agents, slip agents, antioxidants, desiccants, wetting agents, and waxes.

[0037] Examples of the coloring agent include organic pigments, extender pigments, carbon black, titanium white, and metal powders.

[0038] In order to make the image forming part 20 visible through the heat-adhesive resin layer 22 and the adhesion-inhibiting part 24, the heat-adhesive resin layer 22 and the adhesion-inhibiting part 24 are transparent or semi-transparent. There is a need to be transparent. However, the image forming part 20 may be formed on the surface of the adhesion inhibiting part 24, and in that case, it is not necessary to be transparent or translucent.

This adhesive material 14 is strongly adhered to the postcard mount 12 in the exposed portions of the heat-adhesive resin layer 22, but in the portions where the adhesion inhibiting portions 24 are formed, the lower heat-adhesive resin layer is adhered. 22 is weakly bonded. therefore,
As shown in FIG. 3, the adhesive material 14 can be relatively easily peeled off from the postcard mount 12 to reveal the confidential information 12a and the image forming part 20.

Furthermore, since the adhesive material 14 is weakly adhered to the postcard mount 12 in the portion where the heat-adhesive resin layer 22 is exposed, it will not be accidentally peeled off from the postcard mount 12.

[0041] Further, the surface of the base material 16 may be appropriately printed with printing suitable for the nature of the postcard, and in the case of a continuous postcard as in the above embodiment, for example, the feed pitch of the base material 16 may be detected. A detection mark (arrow) for this purpose may be printed in black or the like.

Although the adhesion inhibiting portions 24 are formed in a lattice shape in the above embodiment, they may be formed in dot shapes arranged vertically and horizontally.

[0043] In the adhesive material of the present invention, the thermoadhesive resin layer 2
2 is made of delayed tack adhesive and has adhesive properties as an adhesive. Delayed tack adhesive is a type of hot melt adhesive and has a long open time. Therefore, after heating the adhesive material 14,
It can be attached to the postcard mount 12.

FIG. 4 shows a postcard mount 1 of such an adhesive material 14.
FIG. First, the adhesive material 14 is held on the holding reel 26. The adhesive material 14 is unraveled at one end and sent into the dryer 27. The adhesive material 14 is then heated in the dryer 27. Thereafter, the adhesive material 14 is cut at the location indicated by arrow A and is further suctioned into the vacuum device 28 . Further, the adhesive material 14 is adhered to the postcard mount 12 between the vacuum device 28 and the pressure roller 29.

[0045] In this way, since the adhesive material 14 is heated and then attached to the postcard mount 12, the postcard mount 12 is not exposed to heat and the postcard mount 12 is less likely to curl.

FIG. 5 is a perspective view showing another embodiment of the present invention, and FIG. 6 is a sectional view of a main part thereof.

In this embodiment, in particular, the adhesive material 14 is formed to extend from the lower end of the postcard mount 12 and is attached to the lower part of the postcard mount 12 as part of its surface. As in this embodiment, the adhesive material 14 may be formed extending from any end of the postcard mount 12, or may be affixed to the surface of the postcard mount 12.

FIG. 7 is a partial cross-sectional view showing still another embodiment of the present invention. In this embodiment, in particular, the other main surface of the base material 16 is coated with an anti-curl agent to form an anti-curl layer 30, and the surface of the hiding layer 18 is laminated with, for example, polyethylene or polypropylene using a T-die method. , a laminate layer 32 is formed. The base material 16 is then dimensionally stabilized by a dimension stabilizer.

Examples of dimensional stabilizers include butadiene-
Latices such as styrene latex, butadiene-acrylonitrile latex, butadiene-methyl methacrylate latex, chloroprene latex, vinylidene chloride latex, acrylate latex, water-soluble thermosetting resins such as urea resin, melamine resin, phenol resin, PVA (polyvinyl alcohol), etc. Examples include solvent-based resins such as polyester resin, vinyl chloride resin, and shellac resin.

[0050] These are coated or impregnated singly or as a mixture of two or more, or together with a crosslinking agent, and the base material 1
Stabilize the dimensions of 6. Examples of crosslinking agents include epoxy resins, glyoxal, aminoaldehyde resins, zirconium carbonate salts, and the like.

FIG. 8 shows a laminate layer 32 using the T-die method.
FIG. Laminate layer material 3
2a is thinned by a T-die 33 to form a laminate layer 32.

The anti-curl layer 30 is formed to prevent curling. That is, since the hiding layer 18, the laminate layer 32, and the heat adhesive resin layer 22 are formed,
When paper is used as the base material 16, for example, expansion and contraction of the surface of the base material 16 on the hiding layer 18 side is prevented. Therefore, when the paper constituting the base material 16 absorbs and releases moisture from the surface of the base material 16 on the side opposite to the concealing layer 18 side, the paper expands and contracts, causing curling. Therefore, the paper forming the base material 16 is formed in such a way that curling can be prevented by eliminating or minimizing the change in moisture content. As the anti-curl agent, acrylic emulsion, vinylidene chloride resin, polyethylene emulsion, wax such as paraffin wax, microcrystalline wax, metal soap, etc. are used in the form of an emulsion or in the form of heat melting. These alone or
The anti-curl layer 30 is formed by mixing two or more types and coating or impregnating the mixture. Further, the anti-curl layer 30 may be formed by laminating polyethylene on the surface of the base material 16 on the side opposite to the concealing layer 18 side, similarly to the laminate layer 32.

Furthermore, if a non-stretchable material such as a resin film is used as the base material 16, the shrinkage of the concealing layer 18 and the heat-adhesive resin layer 22 may cause curls on the concealing layer 18 side of the base material 16. Occur. Therefore, as the anti-curl agent, water-soluble polymers such as polyvinyl alcohol, polyethylene oxide, and polyvinyl methyl ether, natural polymers such as starch and casein, latex, and aminoaldehyde resins are used. By coating these, an anti-curl layer 30 is formed, and an anti-curl layer 3
0 function cancels out and prevents curls.

[0054] The base material 16 has a tendency for heat to easily escape at the surface, and the surface tends to shrink easily. However, in this embodiment, the base material 16 is dimensionally stabilized by the dimensional stabilizer, so that its surface is less likely to shrink when the adhesive material 14 is manufactured and applied. Furthermore, since the anti-curl layer 30 is formed by coating the other main surface of the base material 16 with an anti-curl agent, the adhesive material 14 is less likely to curl during its manufacture and application.

Note that when covering confidential information such as bank account balances formed on a part of the surface of a postcard, a cut is made so that the base material 16, concealing layer 18, and thermoadhesive resin layer 22 can be separated. , base material 16, hidden layer 18
The heat adhesive resin layer 22 may be appropriately formed so that the base material 16, the hiding layer 18, and the heat adhesive resin layer 22 can be separated from the postcard mount 12 at the cut line. For example, if a cut is formed along the periphery of the base material, only the central portion of the adhesive material can be peeled off. In this case, as shown in FIG.
If the two cuts 34 are composed of a linear cut portion 36a and an arcuate cut portion 36b, the central portion of the adhesive material 14 can be easily peeled off. In order to be able to easily peel off the central part of the adhesive material in this way, for example, as shown in FIG. The linear cuts 34 may be formed diagonally around the base material 18 so that they partially overlap.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG. 1;

FIG. 3 is a sectional view of a main part showing a state in which the adhesive material is peeled off from the postcard mount.

FIG. 4 is an illustrative view showing an example of a method for attaching an adhesive material to a postcard mount.

FIG. 5 is a perspective view showing another embodiment of the invention.

FIG. 6 is a sectional view of a main part of FIG. 5;

FIG. 7 is a partial cross-sectional view showing still another embodiment of the invention.

FIG. 8 is a perspective view showing a method of forming a laminate layer using a T-die method.

FIG. 9 is a surface view of main parts showing another embodiment of the present invention.

FIG. 10 is a surface view of a main part showing a modification of the embodiment in FIG. 9;

FIG. 11 is a sectional view showing a conventional adhesive material.

[Explanation of symbols]

14 Adhesive material 16 Base material 22 Heat adhesive resin layer 24 Adhesion inhibiting part

Claims (1)

[Claims] 1. A base material, a heat-adhesive resin layer formed on one main surface of the base material and made of a delayed-tack heat-adhesive resin for pasting the base material to an object to be pasted, and An adhesive material comprising adhesion inhibiting parts that are formed in a dispersed manner on the surface of the thermoadhesive resin layer and partially reduce the adhesive force of the thermoadhesive resin layer.