JPH07168386A - Adhesive sheet for laser printer and its production - Google Patents

Abstract

PURPOSE:To provide the adhesive sheet with which the generation of curling and static electricity due to the heating at the time of performing recording with the laser printer can be inhibited from occurring and which has excellent traveling properties and adaptability to the stacker and further is provided with printability and suitability and also to provide the production of the adhesive sheet. CONSTITUTION:One surface of the adhesive base paper 1 and one surface of the release base paper 4 are coated with a synthetic resin emulsion to provide the synthetic resin coating layers 2 and 5 respectively on them, each of which layers has a 0 to 50g/m<2> 24Hr moisture vapor premeation rate measured by using JIS Z-0208. Then the surfaces of the layers 2 and 5 are coated with a pigment coating liquid consisting essentially of a pigment and an adhesive to form an adhesive sheet base paper and a release sheet base paper respectively. Subsequently, the release layer 8 is provided on the other surface of the release sheet base paper through the filler layer 7 and the surface of the release layer 8 is coated with an adhesive to provide the adhesive layer 9 on it and thereafter the surface of the adhesive layer 9 and the adhesive base paper of the adhesive sheet base paper are bonded together with the adhesive to produce the objective adhesive sheet. Thus, the adhesive sheet for the laser printer and its production can be provided.

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 sheet used for recording by a laser printer and a method for producing the same, and more specifically, it does not cause curling or static electricity during recording by a laser printer and is a sheet. The present invention relates to a pressure-sensitive adhesive sheet having excellent runnability and stacker suitability, printability and printability, and a method for producing the same.

Recording by a laser printer is one in which toner is transferred and heat-fixed by the principle of an electrophotographic recording system, but in the past, high-quality paper or continuous foam paper was used. However, in recent years, die-cut adhesive sheets and adhesive continuous foam sheets have come to be used because of their easy handling. The adhesive sheet and the adhesive continuous foam sheet are mainly those based on high-quality paper or glassine paper, those with polyethylene laminated on the back surface, those processed with synthetic resin, those with a conductive pigment coating layer (special (Kaihei 3-252486)
Etc. are used.

[0003]

However, when such an adhesive sheet or an adhesive continuous foam sheet is subjected to a laser printer, the heat generated inside the printer during recording and the heat (150 to 200 ° C.) during fixing of the toner cause a problem. Heat-expanding curls and dehumidifying curls may occur on the adhesive sheet and continuous adhesive foam sheet, and static electricity may cause recording paper to have poor runnability and paper jams in the stacker. Due to this, there was a drawback that the machine stopped.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heat-expandable curl and a curl to a pressure-sensitive adhesive sheet and a pressure-sensitive adhesive continuous foam sheet due to heat generated inside the printer at the time of recording and heat applied at the time of toner fixing even when used in a laser printer. An object of the present invention is to provide a pressure-sensitive adhesive sheet for a laser printer that does not cause dehumidification curl and that suppresses the generation of static electricity, and a method for producing the same.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and a coating layer having a specific constitution is formed on both the adhesive base paper and the release base paper. It is characterized by That is, according to the present invention, a pigment coating layer is formed on one surface of each of the adhesive base paper and the release base paper via a synthetic resin coating layer, and a sealing layer is formed on the other surface of the release base paper. Provided is a pressure-sensitive adhesive sheet for a laser printer, characterized in that a release layer and a pressure-sensitive adhesive layer are sequentially formed through, and the pressure-sensitive adhesive layer is bonded to the other surface of the pressure-sensitive adhesive base paper so as to face each other. It The water vapor transmission rate according to JIS-Z-0208 of the synthetic resin coating layer is 0 to 50 g.
/ M ² · 24 Hr is preferable for achieving the above object. Further, according to the present invention, one surface of the adhesive base paper and the release base paper is coated with a synthetic resin emulsion, and the moisture permeability according to JIS-Z-0208 is 0 to 50 g / m 2.
^A synthetic resin coating layer of ² · 24 Hr is provided, and a pigment coating liquid containing a pigment and an adhesive as a main component is coated on the synthetic resin coating layer to form an adhesive sheet base paper and a release sheet base paper. Then, a release layer is provided on the other surface of the release sheet base paper via a sealing layer, and an adhesive layer coated with an adhesive is provided on the release layer,
There is provided a method for producing an adhesive sheet for a laser printer, which comprises adhering the adhesive layer surface and the base paper surface of the adhesive sheet base paper described above.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The pressure-sensitive adhesive sheet for laser printer of the present invention and the method for producing the same will be disclosed in detail below. A first technical feature of the present invention is to coat a surface of an adhesive base paper and a release base paper with a synthetic resin coating layer, which is coated with a synthetic resin emulsion, through a synthetic resin coating layer. The point is that the layers were formed. At this time, the moisture permeability according to JIS-Z-0208 of the synthetic resin coating layer is 0.
It is preferably formed so as to be ˜50 g / m ² · 24 Hr. By specifying the moisture vapor transmission rate within this range,
When the pressure-sensitive adhesive sheet of the present invention is used in a laser printer, heat generated internally during recording or heating during toner fixing suppresses the movement and reduction of water contained in the pressure-sensitive adhesive base paper and the release base paper, and The curl can be prevented. This pigment coating layer constitutes the front and back surfaces of the pressure-sensitive adhesive sheet for a laser printer of the present invention as described below, and not only has good printability but also curls due to heating during recording by a laser printer. In addition, the generation of static electricity is suppressed.

On the other surface of the release sheet base paper, a release layer is provided via a sealing layer, and an adhesive layer coated with an adhesive is provided thereon. The pressure-sensitive adhesive layer surface is pressure-sensitively adhered to the base paper surface of the pressure-sensitive adhesive sheet base paper to form a pressure-sensitive adhesive sheet for a laser printer as a whole.

<Adhesive Base Paper> The adhesive base paper used in the present invention includes high-quality paper, glassine paper, art paper, coated paper, resin-impregnated paper, etc., which are used for ordinary adhesive sheets, and coloring thereof. Those having a basis weight of 30 to 160 g / m ² , preferably 50 to 100 g / m ² are used.

<Formation of Synthetic Resin Coating Layer on Adhesive Base Paper> On one surface of the adhesive base paper, a high moisture-proof property is provided for the purpose of suppressing the movement and decrease of water content of the base paper due to heat and preventing curling. A synthetic resin coating layer having the same is formed. As the synthetic resin used for this purpose, emulsions of styrene type, styrene-butadiene type, acrylic type, vinyl type, vinylidene type, etc. are used alone and / or in combination, and among them, styrene-butadiene type, acrylic type synthesis is used. A resin emulsion is preferably used. These emulsions are used in a rod coater, a blade coater, a roll coater or the like in an amount of 5 to 20 g / m ^{2 in} terms of absolute dryness, preferably 8
~ 15g / m ^{2 After} coating, it is usually dried at 120 ° C for about 1 minute to give a moisture permeability of 0 according to JIS-Z-0208.
A synthetic resin coating layer of 50 g / m ² · 24 Hr is formed. If the water vapor permeability exceeds the above range, dehumidification curl phenomenon is generated due to movement of moisture contained in the adhesive base paper and reduction of moisture, which is not preferable.

<Formation of Pigment Coating Layer on Adhesive Base Paper> A pigment coating layer is provided on the surface of the above-mentioned synthetic resin coating layer for the purpose of preventing blocking and static electricity, and imparting printability and printability. To be This pigment coating layer contains a pigment and an adhesive, and if necessary, a dispersant, an auxiliary agent and the like are added. As the pigment, various kinds of clay usually used in the production of art paper and coated paper, calcium carbonate, talc, titanium dioxide, aluminum hydroxide and the like are used alone or in combination.

As the adhesive, casein, polyvinyl alcohol, various starches, polyacrylamide, carboxymethylcellulose, methylcellulose, styrene-butadiene latex, methylmethacrylate, arylonitrile-butadiene used for producing art paper and coated paper are used. Latex, acrylic emulsion or the like is used. Further, if necessary, a pigment dispersant such as sodium tripolyphosphate, sodium pyrophosphate, etc., and various additives, auxiliaries and the like are used in combination, and the total amount thereof is 35 to 50.
It is prepared as a pigment coating liquid having a concentration of%.

[0012] coated on the air knife coater, roll coater, a blade coater - like the coating 5 to 25 g / m ² the amount of absolute dry conversion, and preferably ² coated 10 to 20 g / m, usually, 150 The adhesive sheet base paper is obtained by drying at about 1 minute for 1 minute and then smoothing the surface with a super calender or the like to form a pigment coating layer. In addition, the surface of the synthetic resin coating layer having high moisture resistance is generally water repellent, and if the pigment and the coating are not uniformly coated, a fluorine-based or acetylene-based surfactant is synthesized as necessary. 0.5 to 0.5 for the resin coating layer and the pigment coating layer
You may add about 3 weight%.

<Release Base Paper> The release base paper used in the present invention includes high-quality paper, kraft paper, glassine paper, art paper, coated paper, and the like used for ordinary release paper, and these are colored. Those having a grammage of 30 to 160 g / m ² , and preferably 50 to 100 g / m ² are used.

<Formation of Synthetic Resin Coated Layer on Release Base Paper> On one surface of the release base paper, as with the adhesive base paper, movement and decrease of water content of the base paper due to heat are suppressed and curling is prevented. For the purpose, a synthetic resin coating layer having high moisture resistance is provided, and the synthetic resin used for this is similar to that used for the adhesive base paper, styrene-based, styrene-butadiene-based, acrylic-based, Emulsions of vinyl type and vinylidene type are used alone and / or in combination, and among them, styrene-butadiene type and acrylic type synthetic resin emulsions are preferably used. The synthetic resin emulsion, a rod coater, a blade coater, 5 to 20 g / m ² by absolute dry conversion by a roll coater or the like, preferably After ² coated 8~15g / m, usually, 120
After drying at 1 ° C. for 1 minute, a synthetic resin coating layer having a moisture permeability according to JIS-Z-0208 of 0 to 50 g / m ² · 24 Hr is formed. If the water vapor transmission rate of the synthetic resin coating layer to the release base paper exceeds the above range, dehumidification curl phenomenon is generated due to the movement of water and the decrease of water as in the case of the adhesive base paper, which is not preferable.

<Formation of Pigment Coating Layer on Release Base Paper> On the surface of the above-mentioned synthetic resin coating layer, a pigment coating layer is provided for the purpose of blocking, preventing static electricity and imparting printability.
The pigment coating layer contains a pigment and an adhesive, and optionally contains a dispersant and other auxiliary agents. As the pigment, various kinds of clay used for producing art paper and coated paper, calcium carbonate, talc, titanium dioxide, aluminum hydroxide and the like are used alone or in combination. Also,
As the adhesive, art paper, casein used in the production of coated paper, polyvinyl alcohol, various starches, polyacrylamide, carboxymethyl cellulose, methyl cellulose, styrene-butadiene latex, methyl methacrylate, acrylonitrile-butadiene latex, acrylic emulsion and the like are used. To be

Further, if necessary, pigment dispersants such as sodium tripolyphosphate and sodium pyrophosphate, and various additives, auxiliaries, colorants and the like are used in combination, and they are used in the range of 35 to 50.
It is prepared as a pigment coating liquid having a concentration of%. The pigment coating liquid used here may be the same as the pigment coating liquid used for the adhesive base paper, but for the purpose of cost reduction, an inexpensive material is selected and used and the adhesive base paper. Those colored for the purpose of distinguishing from the provided pigment coating layer are preferably used.

[0017] coated is, an air knife coater, 5 to 25 g / m ² roll coater, a laydown with a blade coater absolute dry conversion, and preferably ² coated 10 to 20 g / m, usually, 150 The pigment coating layer is formed by drying at 1 ° C. for about 1 minute and then smoothing the surface with a super calender or the like to obtain a release sheet base paper.
In addition, the surface of the synthetic resin coating layer having high moisture resistance is generally water repellent, and if the pigment and the coating are not uniformly coated, a fluorine-based or acetylene-based surfactant is synthesized as necessary. 0.5 for resin coating and pigment coating
You may add about 3 weight%.

<Formation of a sealing layer on the release base paper> On the other surface of the release base paper, a sealing layer is formed on the other surface of the release base paper for the purpose of suppressing permeation of a release agent to be coated on this surface into the release base paper. Is formed.
The filling layer is formed by coating polyvinyl alcohol, starch or the like or laminating polyethylene, polypropylene or the like. Of these, a polyethylene laminate is generally used, and the film thickness is processed to 10 to 30 μm, preferably 12 to 20 μm. Further, in laminating polyethylene, the adhesion between the release base paper and the polyethylene laminate can be enhanced by subjecting the surface of the release base paper to corona discharge treatment.

<Formation of Release Layer on Release Base Paper> A release layer is provided on the surface of the sealing layer described above. As a release agent,
Silicone resins, polyester resins, fluororesins and the like which are usually used for release paper are used, and among them, silicone resins are preferably used. The release layer, the resin roll coater, gravure coater, 0.05~2.5g / m ² absolute dry conversion by a rod coater, preferably 0.1 to 1.5 g / m ² The coated, usually , 120
It is formed by drying at 30 ° C. for about 30 seconds.

<Formation of Adhesive Layer> The surface of the release layer is coated with an adhesive and dried to form an adhesive layer. As the pressure-sensitive adhesive, acrylic, synthetic rubber and natural rubber-based, and vinyl acetate-based adhesives used for ordinary pressure-sensitive adhesive sheets are used, but generally, acrylic-based adhesives are preferably used. These pressure-sensitive adhesive layers are prepared by using a roll coater, bar coater, air knife coater or the like to form the above-mentioned pressure-sensitive adhesive in an amount of 8 to 3 in terms of absolute dryness.
0 g / m ^2, preferably 12~20g / m ² The coated,
Usually, it is formed by drying at 100 ° C. for about 1 minute.

<Formation of pressure-sensitive adhesive sheet for laser printer> On the surface of the pressure-sensitive adhesive layer, the base paper surface of the pressure-sensitive adhesive sheet base paper on which the pigment coating layer is formed via the synthetic resin coating layer is adhered and adhered. A pressure-sensitive adhesive sheet is formed and appropriately cut into a size of office paper, or a continuous foam sheet used in a foam printing machine is tailored to be used for a laser printer.

[0022]

EXAMPLES Next, the present invention will be specifically described with reference to Examples and Comparative Examples, but this is for explaining the effects of the present invention, and the present invention is not limited thereto.

<Example 1> As an adhesive base paper, the basis weight is 70 g.
/ M ² of high-quality paper, OP-390 (styrene / butadiene latex, manufactured by Yushi-Kogyo Co., Ltd.) on one side, coated with a rod coater at an absolute dry conversion of 10 g / m ^{2 and} dried at 120 ° C. for 1 minute. To provide a synthetic resin coating layer,
On the surface of the synthetic resin coating layer, the following pigment coating composition-
The pigment coating liquid according to No. 1 was used to apply an absolute dry coating of 10 g / m ² with an air knife coater, dried at 150 ° C. for 1 minute, and then the surface was smoothed by 3 nip treatment with a super calender to pigment. A coated layer was provided to obtain an adhesive sheet base paper.

Separately from this, as a release base paper, a high-quality paper having a basis weight of 70 g / m ² was used, and one surface thereof was coated with a synthetic resin coating layer and the following pigment coating in the same manner as the adhesive base paper. After providing a pigment coating layer according to Composition-2 to be blended and smoothing the back surface in the same manner, UP polyethylene 205 (polyethylene resin manufactured by Tosoh Corporation) is applied to the other surface (base paper surface) of the adhesive base paper with a laminator. 18 μm thick was laminated to form a sealing layer. Then, B on the surface of the laminate
Y24-312 (silicone resin made by Toshiba Silicone) and SRX-212 (crosslinking agent made by Toshiba Silicone)
0.3g / m ² of the mixture of 100 to 120 ° C,
It is dried for 30 seconds to form a release layer, and B is further applied to the release layer surface.
A mixture of PS-4819 (two-component acrylic adhesive Toyo Ink Mfg. Co., Ltd.) and BHS-8515 (crosslinking agent Toyo Ink Mfg. Co., Ltd.) in a roll coater at an absolute dry conversion of 16 g / m
^Two coats were applied and dried at 100 ° C. for 1 minute to form an adhesive layer.
The pressure-sensitive adhesive layer of the release base paper thus obtained and the base paper surface of the pressure-sensitive adhesive sheet base paper were bonded to each other to obtain a pressure-sensitive adhesive sheet for a laser printer.

[Pigment Coating Composition-1] α Gloss (Clay ECC Co., Ltd.) 100 parts by weight Sodium tripolyphosphate (dispersant, Mitsui Toatsu Chemical Co., Ltd.) 1 part by weight Ace C (oxidized starch, Oji Corn Starch Co., Ltd.) 5 Parts by weight Latex ML501 (styrene / butadiene latex manufactured by Mitsui Toatsu Chemicals, Inc.) 30 parts by weight Tetronic 701 (antifoaming agent manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 0.1 parts by weight Knobcoat C-104 (lubricants manufactured by Sanyo Kasei Co., Ltd.) 0.4 parts by weight With the above composition, the concentration is 40% by weight.

[Pigment Coating Composition-2] α Gloss (Clay ECC Co., Ltd.) 70 parts by weight Softon 1500 (heavy calcium carbonate, Bihoku Powder Co., Ltd.) 30 parts by weight Sodium tripolyphosphate (dispersant Mitsui Toatsu Chemical Co., Ltd.) 1 part by weight Ace C (oxidized starch manufactured by Oji Corn Starch Co., Ltd.) 4 parts by weight Latex ML501 (styrene-butadiene latex manufactured by Mitsui Toatsu Chemicals) 28 parts by weight Tetronic 701 (antifoaming agent manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 0 1 part by weight Knobcoat C-104 (lubricant manufactured by Sanyo Kasei Co., Ltd.) 0.4 part by weight TB1500 violet (colorant manufactured by Dainichiseika Co., Ltd.) 0.01 part by weight A 40% weight concentration is obtained with the above composition.

Example 2 Pigment coating composition-1 provided on the adhesive base paper in Example 1 was replaced with the following pigment coating composition-
A pressure-sensitive adhesive sheet for a laser printer was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive sheet was replaced with 3. [Pigment coating composition-3] α-gloss (Clay ECC Co., Ltd.) 70 parts by weight Brilliant S-15 (light calcium carbonate, Bihoku Powder Co., Ltd.) 30 parts by weight Aron T-40 (dispersant manufactured by Toatsu Gosei Kagaku Co., Ltd.) ) 1 part by weight Ace C (oxidized starch manufactured by Oji Corn Starch) 5 parts by weight Latex L-1622 (styrene-butadiene latex manufactured by Asahi Kasei Chemical Industry Co., Ltd.) 35 parts by weight Tetronic 701 (antifoaming agent manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 0 0.1 part by weight Knobcoat C-104 (lubricant manufactured by Sanyo Kasei Co., Ltd.) 0.4 parts by weight A 40% weight concentration is obtained with the above composition.

Example 3 OP-390 which forms the synthetic resin coating layer of Example 1 was latex L-536B (vinylidene chloride-based synthetic resin emulsion manufactured by Asahi Kasei Corporation).
In the same manner as in Example 1 except that the coating amount was 15 g / m ^{2 in} terms of absolute dryness.

<Example 4> 60 g of basis weight as an adhesive base paper
/ M ² unbleached kraft paper with OP-39 on one side
0 (Styrene-Butadiene Latex on the other hand, manufactured by Yushi Kogyo Co., Ltd.) with a rod coater at an absolute dry conversion of 13 g / m
² coating, dried for 1 minute at 120 ℃, to provide a synthetic resin coating layer, the surface of the synthetic resin coating layer, using an air knife using the pigment coating liquid of the above-mentioned pigment coating composition-1 After coating with a coater in an absolute dry amount of 15 g / m ^{2 and} drying at 150 ° C. for 1 minute, the surface is smoothed by 3 nip treatment with a super calender to provide a pigment coating layer to obtain an adhesive sheet base paper. It was

Separately from this, unbleached kraft paper having a basis weight of 60 g / m ² was used as a release base paper, and one surface of the unbleached kraft paper was coated with a synthetic resin coating layer and a pigment coating in the same manner as the adhesive base paper. After providing a layer and smoothing the surface in the same manner, the other side of the adhesive base paper (base paper surface) is laminated with UP polyethylene 205 (polyethylene resin Tosoh Corporation) to a thickness of 20 μm with a laminator. A stop layer is provided, and a mixture of BY24-312 (silicone resin manufactured by Toshiba Silicone Co., Ltd.) and SRX-212 (crosslinking agent manufactured by Toshiba Silicone Co.) is coated on the surface of the laminate in an amount of 0.3 g / m ^{2 in} terms of absolute dryness, and 1
A release layer is provided by drying at 20 ° C. for 30 seconds, and a mixture of BPS-4819 (two-component acrylic pressure-sensitive adhesive manufactured by Toyo Ink Mfg. Co., Ltd.) and BHS-8515 (crosslinking agent manufactured by Toyo Ink Mfg. Co.) is further provided on the release layer surface. Roll dry with a roll coater 1
6 g / m ^{2 was} applied and dried at 100 ° C. for 1 minute to form an adhesive layer. The pressure-sensitive adhesive layer of the obtained release base paper and the base paper surface of the pressure-sensitive adhesive sheet base paper were bonded to each other to obtain a pressure-sensitive adhesive sheet for a laser printer.

Comparative Example 1 A pressure-sensitive adhesive sheet for a laser printer was obtained in the same manner as in Example 1 except that the pigment-coated layer was omitted from the pressure-sensitive adhesive base paper and the release base paper of Example 1.

Comparative Example 2 A pressure-sensitive adhesive sheet for a laser printer was obtained in the same manner as in Example 1 except that the formation of the synthetic resin coating layer was omitted from the pressure-sensitive adhesive base paper and the release base paper of Example 1.

<Comparative Example 3> As an adhesive base paper, the basis weight is 70 g.
/ M ² unbleached kraft paper is used as it is. Separately, unbleached kraft paper with a basis weight of 60 g / m ² is used as a release base paper, and UP polyethylene 205 is laminated on both sides with a laminator.
(Polyethylene resin manufactured by Tosoh Corp.) is laminated to a thickness of 20 μm, and BY24-312 (silicone resin manufactured by Toshiba Silicone Co., Ltd.) and SRX-212 (crosslinking agent) are laminated on one surface thereof.
A mixture of Toshiba Silicone Co., Ltd.) 0.5g / m
² coat, dry at 120 ℃, 30 seconds to provide a release layer,
BPS-4819 (acrylic two-pack type adhesive Toyo Ink Mfg. Co., Ltd.) and BHS-8515 (crosslinking agent) on the release layer surface.
A mixture of Toyo Ink Mfg. Co., Ltd.) was coated on the release layer surface by a roll coater in an absolute dry conversion of 16 g / m ² and dried at 100 ° C. for 1 minute to form an adhesive layer. Then, the pressure-sensitive adhesive layer surface and the unbleached kraft paper were pressure-bonded to each other to obtain a pressure-sensitive adhesive sheet for a laser printer.

[0034]

[Test Method] Based on the samples obtained in Examples 1 to 4 and Comparative Examples 1 to 3, tests were conducted according to the following test items, test methods, and criteria. 1. Measurement of moisture permeability of adhesive sheet Measured according to JIS-Z-0208 (cup method). unit:
g / m ² · 24Hr 2. Measurement of surface electric resistance of the pigment coated surface. Unit: Ohm, manufactured by Higashi Piezoelectric Wave Co., Ltd., SM-10E type, 20 ° C., 8
The surface electric resistance value of the laser-printed surface of the pressure-sensitive adhesive sheet that had been conditioned for 24 hours in an environment of 0% RH was measured. 3. Laser Printer Suitability Test of Adhesive Sheet For each test, the following tests were carried out using an IBM 3827 type laser printer. 3-1 Feeding Suitability One sheet of A4 size adhesive sheet before laser-transparent paper was placed on the front and back separately, and the maximum curl amount at each of the four corners was measured with a ruler. Unit: mm Judgment standard 2 mm or less ... ○ 2-5 mm ... △ 5 m
m or more ... × 3-2 Double feed (overlap feed due to static electricity) Judgment is based on the number of occurrences of overlap feed due to static electricity when 200 sheets of A4 size adhesive sheets are passed through a laser printer. Judgment criteria No occurrence ・ ・ ・ ○ Occurs once ・ ・ ・ △ Occurrence 2
Number of times × 3-3 Running property Judgment is made based on the number of stops due to a trouble during running when 200 sheets of A4 size adhesive sheet were passed through the laser printer. Judgment criteria No stop ・ ・ ・ ○ Stop once: △ Stop 2
Number of times ×× 3-4 Stacker suitability (paper alignment at the paper discharge part) The paper alignment state at the stacker part when 200 sheets of A4 size adhesive sheets are passed through the laser printer is visually determined. Judgment criteria Good ・ ・ ・ ○ Some problem ・ ・ ・ △ Problem ・ ・ ・ ×

[0035]

[Test Results] The results of each test are shown in Table 1 for Examples 1 to 4 and Table 2 for Comparative Examples 1 to 3.

[0036]

[0037]

[0038]

According to the present invention, as shown in the above test result table, curling and static electricity are not generated at the time of recording by a laser printer, the running property in the laser printer is excellent, and the paper is fed in a double feed or stacker. Provided is a pressure-sensitive adhesive sheet for a laser printer, which is free from clogging and paper misalignment and has printability and printability. This pressure-sensitive adhesive sheet has a surface electric resistance value of 10 12 or less on the laser-printed surface that does not generate static electricity. It was good without.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a layer structure of an adhesive sheet for a laser printer of the present invention.

[Explanation of symbols]

 1 Adhesive base paper 2 Synthetic resin coating layer 3 Pigment coating layer 4 Release base paper 5 Synthetic resin coating layer 6 Pigment coating layer 7 Sealing layer 8 Release layer 9 Adhesive layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area C09J 7/02 JKY JLE 7/04 JJ

Claims (3)

[Claims] 1. A pigment coating layer is formed on one surface of a pressure-sensitive adhesive base paper and a release base paper via a synthetic resin coating layer, and a sealing layer is formed on the other surface of the release base paper via a sealing layer. A release layer and an adhesive layer are sequentially formed, and on the other surface of the adhesive base paper,
A pressure-sensitive adhesive sheet for a laser printer, characterized in that the pressure-sensitive adhesive layers are opposed to each other and are bonded together. 2. The JIS-Z-02 of the synthetic resin coating layer.
The pressure-sensitive adhesive sheet for a laser printer according to claim 1, wherein the water vapor transmission rate according to 08 is 0 to 50 g / m ² · 24 Hr. 3. A JIS-Z-02 is prepared by coating a synthetic resin emulsion on one surface of each of the adhesive base paper and the release base paper.
A synthetic resin coating layer having a moisture permeability of 0 to 50 g / m ² · 24 Hr is provided, and a pigment coating liquid containing a pigment and an adhesive as a main component is coated on the synthetic resin coating layer, A pressure-sensitive adhesive sheet base paper and a release sheet base paper are obtained, a release layer is provided on the other surface of the release sheet base paper via a sealing layer, and an adhesive layer coated with an adhesive is provided on the release layer, A method for producing a pressure-sensitive adhesive sheet for a laser printer, characterized in that the pressure-sensitive adhesive layer surface and the base paper surface of the pressure-sensitive adhesive sheet base paper are bonded together.