JPH0723034B2 - Continuous postcard paper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel continuous postcard paper which can be printed by an electrophotographic non-impact printer which can be linked with a computer and can be continuously produced by a pressure bonding device.

[0002]

2. Description of the Related Art A postcard paper which can be continuously produced by using a printer capable of printing in conjunction with a computer and a pressure bonding device is known, and a base paper is in a normal state (normal temperature, normal humidity, normal pressure). In this case, a postcard is formed by applying an adhesive that does not adhere and drying it, and then folding the two paper pieces together and subjecting them to an adhesion treatment.

A method utilizing water, heat, pressure or the like has been considered for the adhesion treatment of postcard paper.

Further, in the case where an adhesive is applied in advance and continuous production is possible by printing in conjunction with a computer, the folding envelope is already widespread, and pressure bonding is used as a means for continuously producing this. The spread of the device is remarkable.

[0005]

However, the re-wetting type adhesive which uses water for the adhesion has a problem that it is easily affected by the outside air and thus the blocking phenomenon is likely to occur.

Further, in the case of an adhesive that uses heat for adhesion, printing by a non-impact printer is formed by thermally fixing the toner. However, it is necessary to use a heat-sealing type adhesive set to a low softening point, which causes a problem that the adhesive softens and adheres to the inside of the printer.

Further, the pressure-sensitive adhesive which uses pressure for bonding has an advantage that it is relatively insensitive to the outside air and the softening point can be set higher than the fixing temperature. When the sheets are stacked one on top of the other in a zigzag folded state, the blocking phenomenon occurs due to the weight of the sheets.

Further, in the conventional foldable envelope paper, since the adhesive is provided only on the peripheral portion of the foldable envelope paper, it is possible to avoid the blocking phenomenon as described above by displacing the coating positions between the facing surfaces. The method is not suitable for postcard paper where the adhesive is applied to the entire surface, but if measures are taken to prevent adhesiveness from adhering to the adhesive, the adhesive force will decrease and the adhesion at the joint surface tends to be insufficient. There is a problem.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a postcard sheet having a first paper piece portion and a second paper piece portion connected to each other through a folding line extending in the center. A pair of feed holes are formed at a predetermined interval on both side edge portions along the direction and both sides of the folding line, and perforations for cutting are provided at a predetermined interval in a direction orthogonal to the paper feeding direction. The first paper piece portion and the second paper piece portion are formed along the folding line, and then the first paper piece portion and the second paper piece portion can be pasted together by pressing the adhesive applied to one surface of the paper. In the continuous postcard paper, the first adhesive in which white or colorless and transparent fine particles that are dispersible and incompatible with the solvent in the adhesive are mixed in the adhesive containing the natural rubber latex as the main component. Agent layer After being formed on the entire surface of one side of the postcard, it is dispersible in the adhesive containing natural rubber latex as the main component, is not compatible with the solvent in the adhesive, and is the first adhesive layer. A second adhesive layer in which white or colorless and transparent fine particles having a particle size larger than that of the fine particles contained in is mixed is formed on the upper layer of the first adhesive layer, and the deterioration treatment is performed on the adhesive. It was rubbed.

[0010]

According to the present invention, since pressure is used for bonding, there is no problem that occurs when an adhesive that uses heat is used, and the adhesive layer has a two-layer structure and fine particles are provided in each layer. By making them mixed and making the particle diameter of the upper layer larger than that of the lower layer, the adhesive strength at the joint surface can be increased, and the blocking resistance can be improved by performing deterioration treatment on the adhesive layer.

[0011]

EXAMPLE A continuous postcard sheet of the present invention will be described in detail below with reference to the illustrated example.

FIG. 1A is a plan view partially showing the continuous postcard sheet 1.

The continuous postcard sheet 1 is the first side on the address writing side.
The paper piece portion a and the second paper piece portion b, which is the information writing surface side, are connected via the folding line 2.

For the folding line 2, for example, perforations are used.

Then, perforations 3, 3 for separating are formed in a direction orthogonal to the sheet feeding direction (indicated by arrow F in the figure).
・ Has been formed with the vertical size of postcards.

The continuous postcard paper 1 has feed holes formed at predetermined intervals on each paper piece.

That is, the feed holes 5, 5, ... Are provided at both side edges 4, 4 of the paper at regular intervals, and the feed holes 5, 5 ,. .. and feed holes 5 ', 5', ..

FIG. 1B is a view showing the back surface of FIG. 1A, in which the adhesive 7 is applied to the entire surface of the base paper 6 and then dried.

The adhesive 7 does not adhere under normal conditions (normal temperature, normal humidity, normal pressure), has adhesiveness by applying a predetermined pressure, and has blocking resistance. Good one is suitable.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1B, showing the laminated state of the adhesive with the thickness direction emphasized.

The adhesive layer of the continuous postcard paper 1 has a two-layer structure, and the first adhesive layer 8 is first formed on the entire back surface of the base paper 6.

This is because it is dispersible as an anti-blocking agent in an adhesive containing a natural rubber latex as a main component as a material having heat resistance and self-adhesiveness, and is incompatible with the solvent of the adhesive. An adhesive in which white or colorless transparent particles having a diameter of 2 to 10 μm are mixed is used.

The first adhesive layer 8 is formed by applying this adhesive to the entire surface of the paper and drying it.

Next, the second adhesive layer 9 is formed from the above.

This adhesive can be dispersed as an anti-blocking agent in an adhesive containing a natural rubber latex as a main component, and is incompatible with the solvent in the adhesive.
A mixture of white or colorless and transparent particles having a diameter of μm is used, and the base paper 6 is coated with it and dried, and then the second adhesive layer 9 is subjected to a step of applying an ultraviolet irradiation or an oxidizing means.
Is formed.

As shown in the enlarged view of the main part in FIG.
The first adhesive layer 8 provided on one side of the base paper 6 contains 2 to 2 as an anti-blocking agent in the natural rubber latex 10.
Silica gel s1 having a diameter of 10 μm is dispersed. At that time, the content of silica gel s1 is 1
10 to 20 parts by weight is preferable with respect to 00 parts by weight.

The second layer provided on the adhesive layer
In the adhesive layer 9, the natural rubber latex 11 is dispersed with silica gel s2 having a diameter of 15 to 20 μm as an anti-blocking agent. At that time, the content of the silica gel s2 is 100 to 140 with respect to 100 parts by weight of the natural rubber latex.
Parts by weight are preferred.

In this example, two kinds of silica gel having different particle sizes were used as the anti-blocking agent, but they are white or colorless and transparent particles that can be dispersed in the adhesive and are not compatible with the solvent of the adhesive. Anything can be used if it exists.

Next, a method of adhering the continuous postcard paper 1 will be described.

First, information such as an address and a destination is printed by a non-impact printer on the information writing surface of the first paper piece portion a of the continuous postcard paper 1, and the predetermined information is similarly printed on the information writing surface of the second paper piece portion b. Print with a non-impact printer.

Then, the continuous postcard paper 1 is supplied to a pressure bonding apparatus and folded in two so that the adhesive application surfaces of the respective paper pieces face each other, and then cut off as shown in FIG. 3, 2, ...
It is separated into 2, and a predetermined pressure is applied by the pressure roller r.

Next, the state of the joint surface at the time of bonding will be described.

As shown in FIG. 3, on the adhesive surface in which the first adhesive layer and the second adhesive layer are laminated on one side of the base paper 6, a part of silica gel s2 having a large particle size is a natural rubber latex. It is presumed that it is projected in the state of being covered with 11, and that this forms a rough surface.

The adhesive application surfaces of the first paper piece a and the second paper piece b are overlapped with each other and 0.8 kg in the joining direction.
When a strong pressure of / cm ² or more is applied, the ^second pressure is applied as shown in FIG.
The silica gel s2 dispersed in the natural rubber-based latex 11 in the adhesive layer 9 of the above breaks through the second adhesive layer 9 on the opposing surface and destroys the surface of the first adhesive layer 10 below the first adhesive layer 9. The adhesive of the adhesive layer 10 of No. 1 is discharged from the portion where the adhesive is broken, and thus a strong adhesive force is obtained at the joint surface.

In this example, the following experiment was attempted and satisfactory results were obtained. (1) Preparation of sample The following was used as a sample.

(1-a) Sample 1 An adhesive layer, in which 100 parts by weight of natural rubber latex and 10 parts by weight of silica gel having a particle size of 0.1 to 2 μm are dispersed, is applied and dried on one side of the postcard base paper. After forming the first adhesive layer with 100 parts by weight of natural rubber latex, the particle size of 1
An adhesive in which 100 parts by weight of silica gel having a size of 0 to 20 μm is dispersed is applied and dried to form a second adhesive layer.

(1-b) Sample 2 The adhesive coated surface of Sample 1 was irradiated with 160 W / cm of ultraviolet rays.

(1-c) Sample 3 Ozone gas was radiated onto the adhesive-coated surface of Sample 1 for 10 minutes. (2) Adhesion experiment Sample 1, sample 2, and sample 3 prepared as described above were folded with bending lines so that the adhesive-coated surfaces face each other, and pressed at a pressure of 0.8 kg / cm ² . However, the adhesion was good in all the samples, and when peeling between the joints was attempted after that, a strong jointing force was shown. (3) Blocking resistance test Sample 1, sample 2, and sample 3 prepared as described above were folded so that their adhesive-coated surfaces face each other,
When the sample 1 was left in a high temperature bath at 50 ° C while being pressurized with a pressure of 50 g / cm ² , light adhesion was observed between the facing surfaces of Sample 1, but adhesion was observed for Samples 2 and 3. It was confirmed that the deterioration means applied to the adhesive worked sufficiently.

From this result, it is presumed that the blocking phenomenon does not occur even when the sheets are stacked in a zigzag-folded state under normal temperature, normal pressure and normal humidity.

[0040]

As described above, according to the continuous postcard paper according to the present invention, the blocking resistance is improved by subjecting the adhesive layer provided on the entire bonding surface to deterioration treatment, and the adhesive agent is improved. Even when the coated surfaces are stacked and stored in a zigzag folded state, the blocking phenomenon does not occur at least due to the weight of the paper, and sufficient adhesion is achieved by applying a predetermined pressure using a pressure bonding device. You can get the power.

Further, since the adhesive layer is provided in two layers, even if the adhesive force is remarkably reduced due to the deterioration means in the upper second adhesive layer,
A sufficient adhesive force can be obtained by the function of the first adhesive layer formed in the lower layer.

[Brief description of drawings]

FIG. 1 is a diagram showing a state before adhering to an example of an embodiment of a continuous postcard sheet of the present invention, in which (a) is a diagram showing a side on which a destination or the like is described, and (b) is a rear face of the same diagram (a). FIG.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged cross section of a main part.

FIG. 4 is a perspective view showing a bonding step in the pressure bonding apparatus.

FIG. 5 is an explanatory view conceptually showing the bonding state of the adhesive on the bonding surface.

[Explanation of symbols]

 1 continuous postcard paper a first paper piece part b second paper piece part 2 folding line 3 perforation for cutting 5, 5'feed hole 8 first adhesive layer 9 second adhesive layer 10, 11 natural rubber latex s1 and s2 fine particles

Claims (1)

[Claims] 1. A postcard sheet formed by connecting a first paper piece portion and a second paper piece portion via a folding line extending in the center, and forming a pair with both side edges of the postcard sheet along the longitudinal direction and both sides of the folding line. The feed holes are formed at a predetermined interval, the perforations for cutting are formed at a predetermined interval in a direction orthogonal to the paper feeding direction, and the first paper piece portion and the second paper piece are formed along the folding line. In a continuous postcard paper, which is constructed so that it can be pasted together by pressing the adhesive applied to one side of the paper after it is folded and folded, and (a) contains natural rubber latex as a main component. A first mixture of white or colorless and transparent fine particles, which are dispersible and incompatible with the solvent in the adhesive, in the adhesive.
The adhesive layer of (2) is formed over the entire surface of one side of the continuous postcard paper, and (b) is dispersible in the adhesive containing the natural rubber latex as the main component and is compatible with the solvent in the adhesive. And a second adhesive layer containing white or colorless and transparent fine particles having a larger particle size than that of the fine particles contained in the first adhesive layer is formed on the upper layer of the first adhesive layer. (C) A continuous postcard paper, characterized in that after the second adhesive layer is formed, the adhesive is subjected to a deterioration treatment.