JPH07121111A - Label - Google Patents

Abstract

PURPOSE:To provide the label capable of stably eliminating the transfer of black ink (hiding ink) to a transparent ink layer at the time of peeling. CONSTITUTION:This label is formed by using a mixture composed of a polyamide resin synthesized by condensation reaction of an aliphat. acid and diamine and nitrocellulose for the transparent release type resin layer 3 of the constitution consisting of a hiding resin layer 2, transparent release type resin layer 3 and transparent release resin layer 4 successively from a label base material 1 or using a mixture composed of a vinyl chloride/vinyl acetate copolymer and acrylic resin for the transparent release resin layer 4. The label is peelable between the transparent release type resin layer 3 and the transparent release resin layer 4 after the label is stuck by an adhesive layer 5 to a postcard, etc. An embodiment is the label formed by adding silica to either or both of the transparent release type resin layer 3 and the transparent release resin layer 4 or the label formed by using a pressure sensitive tacky adhesive or thermosensitive type delayed tacky adhesive as the adhesive layer 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label capable of temporarily hiding information written on a postcard or the like.

[0002]

2. Description of the Related Art Recently, payment of insurance, electricity, telephone, etc. charges has been made by automatic transfer, so that a notice of the amount of withdrawal is mailed. This notification was a sealed letter in the old days, but in recent years, it has become common to use a postcard with a low postage rate. And since the contents written in this postcard may be seen by others, it is necessary to take some measures to protect privacy. For this reason, various labels have been developed in which a part of a postcard is covered and the described contents are hidden. As a label having a structure similar to that of the present invention, there is Japanese Utility Model Publication No. 1-139278. This is a label composed of a base material (paper), a black ink layer, a transparent ink layer, and a pressure-sensitive adhesive layer.
It is characterized in that it can be peeled between black ink and transparent ink. However, this structure is peeled between the black ink layer and the transparent ink layer, but it is difficult to form the structure without completely mixing the two layers. There is some layer mixing, and when peeled off, the black ink slightly transfers to the surface of the transparent ink.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a label capable of stably eliminating the transfer of black ink (masking ink) to the transparent ink layer at the time of peeling. Is provided.

[0004]

In order to solve the above-mentioned problems, the present invention provides a label used for confidential postcards, etc., in which a concealing resin layer, a transparent release resin layer, a transparent release resin layer, an adhesive layer are attached to a label base material. In the layer structure, the transparent release resin layer is a mixture of polyamide resin and nitrification cotton synthesized by condensation reaction of fatty acid and diamine, and the transparent release resin layer is a mixture of vinyl chloride / vinyl acetate copolymer and acrylic resin. using,
It is a label that can be peeled between the transparent release resin layer and the transparent release resin layer after being attached to a postcard or the like with an adhesive layer. As an embodiment, the transparent release resin layer, the above label in which silica is added to either or both of the transparent release resin layer, and the pressure-sensitive adhesive or the heat-sensitive delayed adhesive as the adhesive layer. The label mentioned above is used.

(Detailed Description) The present invention will be described with reference to FIG. 1. The constitution of the present invention comprises a substrate (1), a concealing resin layer (2), a transparent release resin layer (3) and a transparent layer. It comprises a release resin layer (4) and an adhesive layer (5).

As the substrate (1), paper, plastic film, resin synthetic paper or the like is used.

As the concealing resin layer (2), a resin that adheres to the base material (1) with a colorant having a concealing property, for example, a titanium oxide pigment, an aluminum pigment, a black ink and an indigo pigment is used. Resins used here include cellulose derivatives, styrene resins, styrene copolymer resins, acrylic resins, methacrylic resins, rosin ester resins, polyvinyl acetate resins, polyvinyl chloride, vinyl chloride / vinyl acetate copolymers, ethylene / vinyl acetate. One or more of a copolymer, polyester resin, polyurethane resin, butyral resin, polyamide resin, petroleum resin, chlorinated rubber, and chlorinated polyolefin resin are used. When the base material itself has a concealing property, this layer omits the concealing colorant, or when the transparent release resin layer (3) described below adheres to the base material (1). May omit the layer itself.

A combination of the transparent release resin layer (3) and the transparent release resin layer (4) is synthesized in the transparent release resin layer at the core of the present invention by a condensation reaction of a fatty acid and a diamine. A mixture of polyamide resin and nitrification cotton and a mixture of vinyl chloride / vinyl acetate copolymer and acrylic resin are used for the transparent release resin layer. No coloring agent is contained in both layers.
Further, silica is added to either one or both of the both layers to improve the writability of the transparent release resin layer and to provide an antiglare effect.

As the adhesive layer (5), a heat sensitive adhesive, a pressure sensitive adhesive, a delayed tack type heat sensitive adhesive or the like is used.
The difference between heat sensitive adhesive and delayed tack type heat sensitive adhesive is
Delayed tack type heat-sensitive adhesives are adhesives in which tack continues after heat activation, and ordinary heat-sensitive adhesives lose their adhesiveness almost immediately after removing the heat source for activation. The pressure-sensitive adhesive adheres well regardless of the type of adherend, but since a separator is required for manufacturing, the cost is high.

The delayed tack type heat-sensitive adhesive comprises a polymer material, a tackifier and a solid plasticizer. It is an adhesive that is not tacky at room temperature, but becomes tacky when heated and remains for a considerable period of time after cooling. Here, the polymer material is a component that gives an adhesive force, and includes polyvinyl acetate, copolyethylene-vinyl acetate, polyacrylic acid ester-based, polyvinyl chloride-based, natural rubber, synthetic rubber, copolyvinyl acetate-acrylic acid ester, Polyester system,
Polymer compounds such as polyurethane.

The tackifier is a component for enhancing the tackiness when activated by heating, and is a resin such as a rosin derivative, a terpene resin type, a petroleum resin type, a phenol resin type or a xylene resin type. . Solid plasticizers are solid at room temperature and dissolve when heated above their melting point to swell / dissolve polymeric materials and tackifiers, develop viscous / adhesive properties, and once they dissolve, crystallize easily. The adhesive holding time after heat activation can be extended without being activated. Diphenyl phthalate, Dihexyl phthalate, Dicyclohexyl phthalate, Dihydroabietyl phthalate, Dimethyl isophthalate, Sucrose benzoate, Ethylene glycol dibenzoate, Trimethylolethane tribenzoate, Tribenzoic acid glyceride, Pentaerytrate tetrabenzoate, Sucrose octaacetate, tricyclohexyl citrate, N
-Cyclohexyl-P-toluenesulfonamide and the like.

[0012]

When the label of the present invention is used for a postcard or the like, the contents described on the surface of the adherend such as a postcard are hidden by the masking resin layer or the base material, and the transparent release resin layer for peeling off the label is used. It is peeled from between the transparent release resin layers, and only the transparent resin layer remains on the surface of the adherend, so that the description content of the adherend can be read. In addition, a mixture of polyamide resin synthesized by condensation reaction of fatty acid and diamine and nitrification cotton is used for the transparent release resin layer, and a mixture of vinyl chloride / vinyl acetate copolymer and acrylic resin is used for the transparent release resin layer. By doing so, the transparent release resin layer and the transparent release resin layer can be peeled stably and reliably.

[0013]

【Example】

<Example 1> The composition of (Table 1) was 3 μm, the composition of (Table 2) was 2 μm, and the composition of (Table 3) was coated on one surface of a double-sided coated paper having a basis weight of 104 g / m ^2. The composition of 3 μm and (Table 4) was applied in order of 2 μm to form a label.
After sticking to a postcard with a heat roller of 160 degrees and then peeling, it was possible to peel from between the transparent release resin layer and the transparent release resin layer.

Example 2 On one side of a double-sided coated paper having a basis weight of 104 g / m ² , the composition of (Table 1) was 3 μm, then the composition of (Table 2) was 2 μm and (Table 3). 3μ composition
m, the composition of (Table 5) was sequentially applied in a thickness of 10 μm to form a label. The label was activated with 120 ° C. hot air and applied to a postcard, and then peeled off to give a transparent release resin. It was possible to separate from between the layer and the transparent release resin layer.

Example 3 On one side of a double-sided coated paper having a basis weight of 104 g / m ² , the composition of (Table 1) was 3 μm, then the composition of (Table 2) was 2 μm, and the composition of (Table 3) was 3μ composition
m, the composition of (Table 6) was sequentially applied in a thickness of 20 μm, a separator was applied to form a label, the separator of this label was peeled off, the label was attached to a postcard by hand, and the label was peeled off.
It was possible to separate from between the transparent release resin layer and the transparent release resin layer.

Example 4 On one side of a double-sided coated paper having a basis weight of 104 g / m ² , the composition of (Table 1) was 3 μm, then the composition of (Table 2) was 2 μm and (Table 7). 3μ composition
m, the composition of (Table 6) was sequentially applied in a thickness of 20 μm, a separator was applied to form a label, the separator of this label was peeled off, the label was attached to a postcard by hand, and the label was peeled off.
It was possible to separate from between the transparent release resin layer and the transparent release resin layer. Further, by adding silica, the surface of the transparent release resin layer can be matted, and antiglare property and writability can be obtained.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Table 3]

[0020]

[Table 4]

[0021]

[Table 5]

[0022]

[Table 6]

[0023]

[Table 7]

[0024]

INDUSTRIAL APPLICABILITY According to the present invention, a label for protecting privacy is excellent in concealment, cannot be restored to its original state when tampered with, and confidentiality and safety can be secured. Also, it can be peeled off more neatly than conventional ones.

[0025]

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional explanatory view showing a configuration of the present invention.

[Explanation of sign]

1 ... Substrate 2 ... Hiding resin layer 3 ... Transparent release resin layer 4 ...
Transparent release resin layer 5 ... Adhesive layer

Claims (4)

[Claims] 1. A label used for a confidential postcard or the like,
A mixture of a polyamide resin and a nitrification cotton synthesized from a label substrate by a concealing resin layer, a transparent release resin layer, a transparent release resin layer, and an adhesive layer, which is synthesized by a condensation reaction of a fatty acid and a diamine in the transparent release resin layer. , Using a mixture of vinyl chloride / vinyl acetate copolymer and acrylic resin for the transparent release resin layer, stick it to a postcard with an adhesive layer, and then peel between the transparent release resin layer and the transparent release resin layer A label that is characterized by what is possible. 2. The label according to claim 1, wherein silica is added to either or both of the transparent release resin layer and the transparent release resin layer. 3. The label according to claim 1, wherein a pressure-sensitive adhesive is used as the adhesive layer. 4. The label according to claim 1, wherein a heat-sensitive delayed pressure sensitive adhesive is used as the adhesive layer.