JPH07290867A - Pressure-sensitive adhesive form - Google Patents

Abstract

PURPOSE:To prevent a blocking phenomenon from occurring and simplify a sequence of manufacturing steps to realize cost reduction by coating an adhesive to the right and left alternately in a pressure-sensitive adhesive form. CONSTITUTION:In a continuous form consisting of unit forms created only on one of the opposite surfaces of a base 1, a pressure-sensitive adhesive layer 3a which adheres opposite bases in foldback or laminated form so that they are separable from each other, are formed to the right and left alternately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive foam having an adhesive layer which can be used as a mail form for a postcard.

[0002]

2. Description of the Related Art Conventionally, sealed letters have been used for confidential information such as notifications from financial institutions and government offices. The mainstream of such envelopes is a three-fold mail form in which the mail form itself is folded and the periphery is adhered to be sent as an envelope. This tri-fold mail form prints confidential information such as deposit balance notification, loan amount, transaction notification, contract details, etc., and it is in the form of an envelope as it is, so enclosing and sealing work is not required and Matching of confidential information can be surely achieved. In addition, the destination and confidential information can be printed on the same side, so non-impact printer (NIP)
It can print on one side at a time with a high-speed printer such as, and can perform efficient processing. However, the three-fold mail form has only the peripheral edge adhered, and is handled as an "envelope" by the Postal Law, and the postage is higher than that of a "postcard". On the other hand, recently, a peelable pressure-sensitive adhesive layer is formed on a mail foam base material, secret information is printed on this mail form, and this is folded in two or three to make pressure-sensitive adhesion. A mail form is used in which the agent layers are opposed to each other and pressure-bonded to form a postcard in which secret information is hidden. After the postcard is mailed, the hidden secret information can be viewed by peeling it from the pressure-sensitive adhesive layer. And the postage of this mail form is treated as a "postcard".

[0003]

In the mail form having such a peelable pressure-sensitive adhesive, the peelable pressure-sensitive adhesive 3b is attached to the mail foam substrate 1 as shown in FIG. The entire surface was coated with an air knife coater or the like. Then, after printing fixed information such as ruled lines and explanations on this, variable information is printed by a printer and folded,
Postcards were created by applying processing such as crimping and cutting. However, in the conventional mail form in which the pressure-sensitive adhesive layers are releasably adhered to each other, it is necessary to form the pressure-sensitive adhesive layer on the entire concealing surface. As described above, since the pressure-sensitive adhesive layer is formed on at least the entire concealing surface, there is a problem that blocking occurs when the continuous mail form is folded and stored, or when the mail form is cut and processed. Further, considering the coating amount of the pressure sensitive adhesive, it was not preferable from the viewpoint of cost. Therefore, an object of the present invention is to provide an inexpensive pressure-sensitive adhesive foam that can prevent blocking.

[0004]

SUMMARY OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, has a pressure-sensitive adhesive layer in which a base material is folded back or laminated and opposing base materials are peelably bonded to each other.
In a continuous foam in which unit foams formed on only one surface of the base material opposite to each other are vertically joined, the pressure-sensitive adhesive layers are alternately formed on the left and right sides.

[0005]

The pressure-sensitive adhesive foam of the present invention is a continuous foam in which unit foams are connected in the vertical direction, and the pressure-sensitive adhesive layers are formed alternately on the left and right. In addition, since the pressure-sensitive adhesive layers of the unit foams facing each other do not overlap each other, blocking can be prevented.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the present invention. In FIG. 1, the foam paper base material 1 is divided into three parts in the flow direction (vertical direction in the drawing), and is divided for each unit foam in a direction perpendicular to the flow direction (horizontal direction in the drawing). In each unit foam divided into three, 2 is a pressure-sensitive adhesive non-coated surface, 3a is a pressure-sensitive adhesive coated surface, and 4 is an address printing surface. Further, as shown in FIG. 1, the pressure-sensitive adhesive layers are formed by alternately coating like a checkered pattern. Here, as is apparent from FIG. 1, the pressure-sensitive adhesive foam according to the present invention includes a marginal portion 5 in which a marginal punch is formed, as compared with a conventional whole surface coat (see FIG. 2). The area is 1/3 or less. That is, the amount of pressure-sensitive adhesive coated is about 1/3, and the cost of the adhesive used is also about 1/3.

Next, each constitution of the pressure-sensitive adhesive foam of the present invention will be described in detail. First, as the foam paper base material used in the present invention, white fine paper is usually used, but the surface is roughened by corona treatment, matte treatment, or the like, or a primer having writability and printability is used. If the pressure-sensitive adhesive exhibits good adhesion to the substrate by providing a layer or the like, PE
Synthetic resin films such as T, PE, PP and vinyl chloride and synthetic paper can be used.

The pressure-sensitive adhesive used in the present invention is a pressure-sensitive adhesive containing NR (natural rubber) SBR (styrene butadiene rubber) as a resin component, water as a volatile component, and microsilica as a pigment component. Adhesives can be used. In order to improve the adhesiveness to paper, PM
MA (polymethylmethacrylate) or the like may be added. Further, an alkali component such as ammonia, which absorbs ultraviolet rays better than the resin component, may be added. Further, a small amount of vinyl acetate may be added. As the additive for improving printability, various dispersions and non-metal powders may be used in addition to microsilica. As the composition of the adhesive exhibiting the characteristics meeting the object of the present invention, a mixture of the above-mentioned components in the following ratios can be preferably used. NR 15 to 20 parts SBR 10 to 30 parts Micro silica 5 to 10 parts PMMA 2 to 10 parts Water 68 to 30 parts In addition to adjusting the proportion of each component in this way, the Tg of resin components such as SBR It is also possible to obtain an adhesive exhibiting properties that meet the object of the present invention.

Further, the coating amount of such a pressure sensitive adhesive is
After drying at ^{0.1g / m 2 ~10g / m 2} , preferably from 1.0g / m ² ~3.0g / m ² is preferred. Within this range, it is possible to print or print on the pressure sensitive adhesive. In this case, the ink can pass through the pressure-sensitive adhesive and reach the base material, and transfer of the printing layer when peeled off can be prevented.

Not only the pressure-sensitive adhesive described above but also any pressure-sensitive adhesive capable of peelably adhering a foam paper base material and having printability and printability may be used. Good.

Next, as a coating method of the pressure-sensitive adhesive when the pressure-sensitive adhesive layer is formed on the foam paper substrate, a conventionally known flexo method or a gravure method capable of speeding up can be used. . In short, any coating method that allows pattern coating can be used. In the conventional coating method, since the endless coating is performed by the air knife method, it is common to coat the pressure-sensitive adhesive before printing, but in the case of the present invention, it is a pattern coating and its processing apparatus. As described above, the coating can be performed by a printing machine (gravure, flexo, etc.), which is almost the same as the printing process. Therefore, it may be coated before printing or after printing. There is a manufacturing advantage that the adhesive coating can be done without the use of bulky equipment such as air knives.

Then, the pressure-sensitive adhesive layer is formed, and the ruled line,
The pressure-sensitive adhesive foam of the present invention, on which fixed information such as explanatory notes is printed, has variable information printed by a printer as in the conventional case, is subjected to processing such as folding, pressure bonding and cutting, and is peelable. A postcard is created.

Next, FIG. 3 shows another embodiment of the pressure-sensitive adhesive foam according to the present invention. In FIG. 3, the foam paper substrate 1 is divided into two in the flow direction (vertical direction in the drawing), and is divided into each unit foam in a direction perpendicular to the flow direction (left and right direction in the drawing). . In each unit foam divided into two, 2 is an uncoated surface and 3a is a pressure sensitive adhesive coated surface. Here, as is apparent from FIG. 3, the pressure-sensitive adhesive foam according to the present invention includes a marginal portion 5 in which a marginal punch is formed, as compared with a conventional whole surface coat (see FIG. 4). Area is 1 /
It is 2 or less. That is, the amount of pressure sensitive adhesive coated is about 1
The cost of the adhesive used is 1/2 or less.

[0014]

As described above in detail, in the pressure-sensitive adhesive foam of the present invention, the pressure-sensitive adhesive layer for folding back or laminating the base materials and adhering the opposing base materials in a peelable manner is In a continuous foam in which unit foams formed only on one surface of the base material facing each other are vertically connected, the pressure-sensitive adhesive layers are alternately formed on the left and right sides, and thus have the following effects. It is a thing. That is, when the pressure-sensitive adhesive foam in a continuous state is folded and stored, or the blocking during the processing such as cutting and folding can be prevented, and the coating area of the pressure-sensitive adhesive is reduced, The cost can be reduced.

[Brief description of drawings]

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

FIG. 2 is a plan view showing a conventional pressure-sensitive adhesive foam.

FIG. 3 is a plan view showing another embodiment of the present invention.

FIG. 4 is a plan view showing a conventional pressure-sensitive adhesive foam.

[Explanation of symbols]

 1 Base Material 2 Pressure-Sensitive Adhesive Non-Coated Surface 3a Pressure-Sensitive Adhesive Coated Surface 3b Pressure-Sensitive Adhesive Coated Surface 4 Address Recording Area 5 Marginal Area

Claims (1)

[Claims] 1. A unit foam in which a pressure-sensitive adhesive layer for folding or laminating a base material and adhering the base materials facing each other in a peelable manner is formed only on one surface of the base material facing up and down. A pressure-sensitive adhesive foam, wherein the pressure-sensitive adhesive layers are alternately formed on the left and right sides in a continuous foam connected in the direction.