JPH0869252A - Shielding seal - Google Patents

Abstract

PURPOSE: To make it possible to obtain stable boundary peeling strength between a leaving part and a peeling part by forming a specific primer layer between this leaving part and the peeling part. CONSTITUTION: This shielding seal is obtd. by forming the primer layer 5 between the leaving part 12 to be stuck on a display surface 2 consisting of characters, patterns, etc., on the surface of a display 1 of a postcard, label, etc., and to be left on this display surface 2 at the time of use and the peeling part 9 to be peeled exclusive of the leaving part 12 by diluting a mixture composed of one kind or >=2 kinds of an acrylic resin, polyamide resin, polyvinyl chloride/vinyl acetate resin, polyurethane resin and nitrocellulose resin by a solvent, such as water, alcohol, toluene, xylene, ethyl acetate or methyl ethyl ketone, and coating the display surface with such soln. As a result, the shielding seal is peeled around this primer layer 5 at the time of peeling the seal. The stable boundary peeling strength is thus obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is, for example, attached to a communication surface of a postcard or a writing surface of a document to shield characters, figures, patterns, etc. on the communication surface, the writing surface, etc. The present invention relates to a shielding sticker in which characters, figures, patterns, etc. can be clearly seen through a part of which is left on the communication surface and the writing surface.

[0002]

2. Description of the Related Art A shielding sticker is also called a confidential sticker. For example, a sticker sticks on the entire communication surface of a postcard or on a specific portion, and the sticking portion is visible to others during the period from the sending to the receipt of the postcard. However, it is well known that the addressee keeps the confidentiality of the correspondence and the addressee receives it and peels off the pasted part, so that the part shielded so far can be clearly seen by the addressee, Therefore, in the conventional case, a release paper, a transparent pressure-sensitive adhesive layer as a remaining portion, a transparent polypropylene resin layer, an ink layer as a shielding layer as a peeling portion, and a cover are laminated in this order. When using, the release paper is peeled off, and the transparent adhesive layer is pressed onto the message to attach it to shield the message, and the recipient of this postcard picks up the cover of the peeling part and peels it off. Is visible, but peeling at this time A transparent polypropylene resin layer of the leaving portion is peeled between the ink layer of the release portion.

[0003]

The shield seal having such a structure should be peeled off after the manufacture, until the shield seal is attached, or after the sticker is shipped and then received by the recipient. However, it is required that the recipient can easily peel off when peeling, but in the conventional one, in order to strengthen the shielding power of the shielding layer at the peeling part to be peeled off, the ink surface printed on the entire surface is used as the shielding layer. Since the transparent polypropylene resin layer as the remaining portion is in contact with the shielding layer which is the ink surface, various components contained in the ink and the polypropylene resin are processing conditions such as ink components and drying conditions, Due to slight fluctuations in molding temperature etc. and changes over time,
There is a case where they are physically and chemically bonded to each other, and the desired desired interfacial peel strength is not obtained, which may cause various troubles. In view of the above, an object of the present invention is to provide a shielding seal that can stably obtain a desired interfacial peel strength.

[0004]

In order to attain the above-mentioned object, the present invention is applied to a display surface 2 consisting of letters, patterns and the like on the surface of a display body 1 such as a postcard or a label, and is used when the display surface is used. Acrylic resin, polyamide resin, polyvinyl chloride vinyl acetate resin, polyurethane resin between the remaining portion 12 left on the upper surface 2 and the peeling portion 9 peeled off with the remaining portion 12 left. , One or a mixture of two or more types of nitrified cotton resin, water, alcohol, toluene,
The shield seal is provided with a primer layer 5 formed by coating a product diluted with a solvent such as xylene, ethyl acetate, or methyl ethyl ketone.

In the present invention, the peeling portion 9 is composed of the cover sheet 3 and the shielding layer 4, but other than this, a synthetic resin layer 8 may be provided, and the synthetic resin layer in FIGS. 8 shows that.

The shielding layer 4 in the present invention is any one of a metal foil, a metal vapor deposition film, a printing surface with a printing ink or a synthetic resin layer colored with a pigment.

In the present invention, the remaining portion 12 is composed of the transparent synthetic resin layer 6 and the transparent pressure-sensitive adhesive layer 7, or the transparent synthetic resin layer 6 and the transparent adhesive resin layer 11, and the transparent adhesive. It may be composed of only the resin layer 11.

The shielding sticker according to the present invention has a release paper 10 on the transparent adhesive layer 7 or the transparent adhesive resin layer 11 of the remaining portion 12 before being attached to the display surface 2. is there.

In the present invention, when the peeling portion 9 is peeled from the remaining portion 12, both portions are peeled off around the primer layer 5, but in this state, the primer layer 5 is divided into two and the remaining portion 12 is removed. And the peeling portion 9 are adhered to and peeled off respectively, or the primer layer 5 remains on the remaining portion 12 and the primer layer 5 is not attached to the peeling portion 9 at all, or conversely to the peeling portion 9. Since the primer layer 5 remains and the primer layer 5 is peeled off without remaining on the remaining portion 12, the state cannot be predicted.

[0010]

[Function] One or a mixture of two or more of an acrylic resin, a polyamide resin, a polyvinyl chloride vinyl acetate resin, a polyurethane resin, and a nitrified cotton resin is provided between the remaining portion and the peeling portion constituting the shielding seal. When the shielding seal is peeled off, the primer layer is formed by coating with a coating diluted with a solvent such as water, alcohol, toluene, xylene, ethyl acetate, methyl ethyl ketone, etc. Stable interfacial peel strength is obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a shielding seal according to the present invention.
FIGS. 2 to 6 are vertical side views showing a state of being attached to a display body, and FIGS. 2 to 6 are vertical side views showing another embodiment of the shielding sticker according to the present invention, in which 1 is a display such as a postcard or a label. Reference numeral 2 denotes a body, which is a display surface composed of characters, patterns, etc. written or printed on the surface of the display body 1. Reference numeral 3 is a cover sheet, on which the desired printing may be applied. 4 is a shielding layer, a metal foil,
It is a metal deposition film, a printing surface with printing ink, or a synthetic resin layer colored with a pigment. 1, FIG.
Further, in the shielding seal shown in FIG. 6, the cover 3 and the shielding layer 4 form the peeling portion 9. Reference numeral 8 denotes a synthetic resin layer, which is provided on the surface of the cover 3 in the shielding seal shown in FIG. 2 and is used as the shielding layer 4 in the shielding seal shown in FIG. 3 as an aluminum foil, a metal vapor deposition film, or a pigment. In the case of using the colored synthetic resin according to 1., the synthetic resin layer 8 is provided on the upper surface of the shielding layer 4, and in the shielding seal shown in FIG. When a colored synthetic resin is used, a synthetic resin layer 8 is provided between the shielding layer 4 and the primer layer 5, and the synthetic resin layer 8 is included in the peeling portion 9 in both cases. 6 is a transparent synthetic resin layer, 7 is a transparent adhesive layer, and 10 is a release paper. In the shield seal shown in FIGS. 1 to 4, the transparent synthetic resin 6 and the transparent pressure-sensitive adhesive layer 7 form the remaining portion 12. Reference numeral 11 denotes a transparent adhesive resin layer. In the shield seal shown in FIG. 5, the transparent synthetic resin layer 6 and the transparent adhesive resin layer 11 serve as a remaining portion 12,
In the shielding seal shown in (1), the transparent adhesive resin layer 11 becomes the remaining portion 12. A primer layer 5 is provided between the remaining portion 12 and the peeling portion 9, and the primer layer 5 is one of acrylic resin, polyamide resin, polyvinyl chloride vinyl acetate resin, polyurethane resin, and nitrification cotton resin. Alternatively, it is a layer coated with a mixture of two or more kinds diluted with a solvent such as water, alcohol, toluene, xylene, ethyl acetate or methyl ethyl ketone.

[0012]

According to the present invention, a primer layer is provided between the remaining portion and the peeling portion, and the primer layer is made of acrylic resin, polyamide resin, polyvinyl chloride vinyl acetate resin, polyurethane resin, Since one or a mixture of two or more kinds of nitrified cotton resins is diluted with a solvent such as water, alcohol, toluene, xylene, ethyl acetate, methyl ethyl ketone, etc., it is coated. Since the layer is separated into the remaining portion and the peeling portion and peeled, extremely stable interfacial peel strength can be obtained. For example, the variation in the maximum and minimum values of the conventional interfacial peel strength is about 15 to 25 gf / 15 mm. 10gf /
It could be kept within 15 mm.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a state in which an example of a shielding sticker according to the present invention is attached to a display body.

FIG. 2 is a vertical sectional side view showing another example of the shield seal according to the present invention.

FIG. 3 is a vertical sectional side view showing another example of the shield seal according to the present invention.

FIG. 4 is a vertical sectional side view showing another example of the shield seal according to the present invention.

FIG. 5 is a vertical sectional side view showing another example of the shielding seal according to the present invention.

FIG. 6 is a vertical sectional side view showing another example of the shield seal according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indicator 2 Display surface 3 Cover sheet 4 Shielding layer 5 Primer layer 6 Transparent synthetic resin layer 7 Transparent adhesive layer 8 Synthetic resin layer 9 Peeling part 10 Release paper 11 Transparent adhesive resin layer 12 Remaining part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C09J 7/02 JJL JJN

Claims (8)

[Claims] 1. A remaining part (12) which is affixed to a display surface (2) consisting of letters, patterns and the like on the surface of a display body (1) such as a postcard and a label and which is left on the display surface (2) in use. )
And a peeling portion (9) which is peeled off leaving the remaining portion (12), an acrylic resin, a polyamide resin,
One or a mixture of two or more of polyvinyl chloride vinyl acetate resin, polyurethane resin, nitrified cotton resin,
A shield seal comprising a primer layer (5) formed by coating a product diluted with a solvent such as water, alcohol, toluene, xylene, ethyl acetate or methyl ethyl ketone. 2. The shield seal according to claim 1, wherein the peeling portion (9) comprises a cover (3) and a shield layer (4). 3. The shield seal according to claim 1, wherein the peeling portion (9) comprises a synthetic resin layer (8) in addition to the cover sheet (3) and the shielding layer (4). 4. The shield sticker according to claim 1, wherein the shield layer (4) is a metal foil, a metal vapor deposition film, a surface printed with a printing ink, or a synthetic resin layer colored with a pigment. 5. The remaining portion (12) is a transparent synthetic resin layer (6).
And transparent adhesive layer (7) or transparent synthetic resin layer (6)
The shield seal according to claim 1, characterized by comprising: and a transparent adhesive resin (11). 6. The remaining portion (12) is a transparent adhesive resin (1
The shield seal according to claim 1, which is composed of only 1). 7. A release paper (10) is provided on the transparent adhesive layer (7) or the transparent adhesive resin layer (11) of the remaining portion (12) before being attached to the display surface (2). The shield seal according to claim 1. 8. The peeling part (9) according to claim 1, characterized in that the remaining part (12) and the peeling part (9) are separated and separated around the primer layer (5). Shielding seal.