JPH11277926A - Substrate for plate material for printing corrugated board and laminated body for printing corrugated board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate with which a plate material for printing can be speedily bonded together without using an org. solvent at a plate processing site. SOLUTION: This substrate is provided with adhesive layers and separators covering the adhesive layers on both faces. In a laminated body for printing a corrugated board prepd. by laminating a plate material, the substrate and a carrier sheet, the substrate is provided with adhesive layers on both faces and the plate material for printing and the carrier sheet are laminated with these adhesive layers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a support for a cardboard printing plate material and a laminate for cardboard printing.

[0002]

2. Description of the Related Art In conventional cardboard printing, a printing plate material is attached to a carrier sheet with a double-sided tape or the like to form a laminate for cardboard printing, and the laminate is mounted on a printing machine for printing. Was. Rubber plate materials and photosensitive resin plate materials are mainly used for printing plate materials.Integral plate materials without bonding are mainly used, but in recent years, prices and weight have been reduced. In particular, a laminate in which a photosensitive resin plate material and a support are bonded to each other has begun to be used.

[0003] As a conventional method of bonding a photosensitive resin plate material and a support, an organic solvent is applied to the photosensitive resin plate material, the plate surface of the resin plate material is swelled and dissolved, and then the resin plate is adhered to the support. A method is known (JP-A-63-50844, etc.).

As another method, an adhesive layer swellable and dissolvable by an organic solvent is laminated on a photosensitive resin plate material that dissolves or swells with an aqueous solvent, and the organic solvent is applied to the adhesive layer to swell and dissolve. Thereafter, a method of bonding to a support is known (for example, JP-A-8-297369).

However, all of these methods use an organic solvent, so that the working environment of the plate-making operation is deteriorated due to volatilization of the organic solvent. Further, it requires time to dry the organic solvent and stabilize the adhesive force between the photosensitive resin plate material and the support.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to produce a cardboard printing laminate by immediately attaching a printing plate material to a support at a plate making work site without using an organic solvent. Is the subject.

[0007]

The support of the cardboard printing plate material of the present invention mainly has the following constitution in order to solve the above problems. That is, the present invention provides a support for a cardboard printing plate, which is provided with an adhesive layer and a separator covering the adhesive layer on both sides.

The cardboard printing laminate of the present invention has the following configuration. That is, in a cardboard printing laminate in which a printing plate, a support, and a carrier sheet are laminated, the support has an adhesive layer on both sides, and the printing plate and the carrier sheet are laminated by the adhesive layer. It is a laminate for cardboard printing.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The support of the cardboard printing plate material of the present invention includes those having elastic recovery force. Specifically, foamed synthetic rubber, foamed natural rubber, foamed polyurethane, and ultraviolet light exposure are used. Examples include, but are not limited to, a cured photosensitive resin. The hardness of the support is such that the Shore A hardness is 5 ° to 70 °, and further 10 ° to 50 ° from the viewpoint of obtaining sufficient elasticity (cushioning property) for cardboard printing while retaining sufficient recovery force for cardboard printing. ° is preferred.

[0010] The thickness of the support of the cardboard printing plate material of the present invention, while maintaining sufficient resilience for cardboard printing, is too large for the printing plate material in a normal use condition. Due to the pressure, the print image may become thicker,
From the viewpoint of preventing the printed material from being damaged, 1
It is preferably 10 to 10 mm, more preferably 3 to 9 mm.

Here, the thickness of the support means the thickness of the support itself, and does not include the thickness of the adhesive layer or the separator covering the adhesive layer.

The adhesive for forming the adhesive layer on the support of the cardboard printing plate material of the present invention is preferably an adhesive having resistance to a developing solution or washing oil used at the time of plate making or printing. Examples include, but are not limited to, synthetic rubber-based, natural rubber-based, acrylic-based, vinyl acetate-based, and polyurethane-based adhesives.

The separator used in the present invention, ie,
Examples of the so-called release paper and release paper include paper and plastic films such as polyethylene, polypropylene, and polyester. Particularly, paper and plastic films coated with a silicone release agent are preferably used.

Examples of the printing plate material used in the present invention include those commonly used as printing plate materials. Specific examples include polyamide, polyvinyl alcohol (a concept including partially saponified vinyl acetate), and polyurethane. Styrene-butadiene rubber, styrene-isoprene rubber, and the like, and a photosensitive resin plate material having a photosensitive layer, a rubber plate material, and the like, but are not limited thereto. The photosensitive resin plate material described here is usually formed by laminating a substrate (hereinafter sometimes referred to as a base film), a photosensitive layer, and a cover film from the lower layer, and an adhesive layer is provided between the substrate and the photosensitive layer. Or a antihalation layer, or a slip coat layer between the photosensitive layer and the cover film.

Next, as a method for providing an adhesive layer on the support, there are coating by spraying, brushing, bar coater, reverse roll coater, casting from a die, and the like. After providing the adhesive layer on the support, the separator is pressure-bonded to obtain a support having the adhesive layer on one side and the separator covering the adhesive layer. By carrying out the above-mentioned formulation on the remaining one side, a support having on both sides the adhesive layer of the present invention and a separator covering the adhesive layer can be obtained. Alternatively, a support having an adhesive layer of the present invention and a separator covering the adhesive layer on both sides can also be obtained by applying the above-mentioned formulation to a support having an adhesive layer and a separator covering the adhesive layer on one side. Is obtained. Next, as a method of producing a cardboard printing laminate using the support obtained by the above method, a case where a printing plate material made of a photosensitive resin is used will be described as an example. After exfoliating and removing the substrate (base film) previously contained in the resin printing plate material, the surface is exposed, and then the separator on one side of the support of the present invention is exfoliated to expose the adhesive layer. Then, the printing plate and the support are bonded together on one side with a hand roller, and then the cover film of the photosensitive resin plate is peeled off and pattern exposure is performed, followed by development, drying, and post-exposure in the usual manner. Forming a relief through each step such as, after that, a method of peeling off the remaining one side of the separator of the support of the present invention and bonding it to a predetermined position of the carrier sheet, or backing the photosensitive resin plate material After forming a relief through each step of light, pattern exposure, development, drying and post-exposure, the cardboard printing of the present invention is performed by a method of bonding the carrier sheet to one surface of the support of the present invention and bonding the remaining surface to the carrier sheet. A laminate for use is obtained.

[0016]

The present invention will be described in more detail with reference to the following examples.

(Example 1) The rubber surface of an independent foamed natural rubber base "Super Soft (registered trademark)" manufactured by Kureha Elastomer Co., Ltd. (sheet thickness 4 mm, Shore A hardness 38 °, with one-sided adhesive processing) was applied to the rubber surface. A solution prepared by dissolving an adhesive component (styrene-butadiene rubber) of an adhesive “NORIO (registered trademark)” manufactured by Sumitomo 3M Ltd. in toluene was applied by a bar coater to a thickness of 15 μm.
Next, after drying with hot air at 30 ° C. for 30 minutes, 100 μm
A separator obtained by applying a silicone release agent to a thick polyethylene terephthalate film was pressure-bonded to prepare a support of the present invention having an adhesive layer and a separator covering the adhesive layer on both sides.

Next, a photosensitive flexographic printing plate material "Flexide" (registered trademark) G type 3 mm manufactured by Nippon Paint Co., Ltd. was used, and a substrate (base film) of this printing plate material was used.
FTW3, a plate making machine manufactured by Toray Industries, Inc.
After performing back exposure by irradiating ultraviolet rays for 2 minutes from the base film release surface side of the printing plate material with an exposure unit of 50 LII ", the separator on one side of the support of the present invention prepared as described above was peeled off. The backing-exposed plate material was pressed against the surface with a hand roller by using a hand roller, and since no organic solvent was used at this time, the working environment was not deteriorated and the bonding was quickly performed. .

Next, the cover film of the back-exposed photosensitive flexographic printing plate material “Flexid” is peeled off,
A negative film is vacuum adhered, and 10
Pattern exposure was performed for a minute. After the exposure, the negative film was removed, the film was set in the developing unit of the FTW350LII, 20 liters of tap water was added, and the temperature was adjusted to 40 ° C.
For a minute. Then, after drying with hot air at 50 ° C. for 30 minutes, the plate was exposed again for 10 minutes from the photosensitive layer side to obtain a printing plate material.

Further, the separator on one side of the adhesive-processed surface of the support of the present invention produced as described above was peeled off and adhered to the carrier sheet with a hand roller to obtain a laminate for cardboard printing. This cardboard printing laminate was mounted on a printing machine and printing was performed. As a result, printing was performed without any problem. The measured adhesive strength between the photosensitive layer and the support of the printing laminate was 0.75 kgf / cm.

Example 2 A commercially available natural rubber plate (3 mm thick,
Sumitomo 3M Co., Ltd. on one side with a Shore A hardness of 50 °
A solution prepared by dissolving an adhesive component (styrene-butadiene rubber) of an adhesive “NORIO (registered trademark)” manufactured by Toluene Co., Ltd. in toluene was applied by a bar coater to a thickness of 15 μm. Next, after performing hot air drying at 30 ° C. for 30 minutes,
A separator obtained by applying a silicone release agent to a polyethylene terephthalate film having a thickness of 00 μm was pressed. The same treatment was applied to the remaining one side to prepare a support having on both sides an adhesive layer of the present invention and a separator covering the adhesive layer.

Next, a 3 mm support (base film) of a photosensitive flexographic printing plate material "Flexode" (registered trademark) G type manufactured by Nippon Paint Co., Ltd. was peeled off, and a plate making machine manufactured by Toray Industries, Inc. was removed. After exposing the substrate (base film) to UV light for 2 minutes from the side where the substrate (base film) was peeled off in the exposure unit section of model “FTW350LII” to perform back exposure, the separator on one side of the support of the present invention was peeled off and the adhesive layer Was exposed, and the exposed plate was pressed against the surface with a hand roller. At this time, since the organic solvent was not used, the working environment was not deteriorated, and the bonding could be quickly performed.

Thereafter, in the same manner as in Example 1, the separator on the adhesive-processed surface on one side of the support was peeled off and adhered to the carrier sheet with a hand roller to produce a laminate for cardboard printing. The adhesive strength between the photosensitive layer and the support of the printing laminate was 0.83 kgf / cm.

Example 3 A commercially available natural rubber plate (3 mm thick,
Sumitomo 3M Co., Ltd. on one side with a Shore A hardness of 50 °
A solution obtained by dissolving an adhesive component (styrene-butadiene rubber) of an adhesive “NORIO” (registered trademark) made by toluene was applied by a bar coater to a thickness of 15 μm. Next, after performing hot air drying at 30 ° C. for 30 minutes,
A separator obtained by applying a silicone release agent to a polyethylene terephthalate film having a thickness of 00 μm was pressed. The same treatment was applied to the remaining one side to prepare a support having on both sides an adhesive layer of the present invention and a separator covering the adhesive layer.

The separator on one side of the support was peeled off to expose the adhesive layer, and a printing rubber printing plate was pressed against the surface with a hand roller. At this time, since the organic solvent was not used, the working environment was not deteriorated, and the bonding could be quickly performed. Thereafter, in the same manner as in Example 1, the separator on the adhesive-processed surface on the remaining one side of the support was peeled off and adhered to the carrier sheet with a hand roller to prepare a laminate for cardboard printing. The adhesive strength between the rubber printing plate material and the support of the printing laminate was 1.13 kgf / cm.

Example 4 A commercially available natural rubber plate (3 mm thick,
Sumitomo 3M Co., Ltd. on one side with a Shore A hardness of 50 °
A solution obtained by dissolving an adhesive component (acrylic rubber) of an adhesive “NORIKO” (registered trademark) made of trichloroethylene was applied by a bar coater to a thickness of 15 μm. Next, after performing hot air drying at 30 ° C. for 30 minutes,
A separator obtained by applying a silicone release agent to a 0 μm-thick polyethylene terephthalate film was pressed. The same treatment was applied to the remaining one side to prepare a support having on both sides an adhesive layer of the present invention and a separator covering the adhesive layer.

The separator on one side of the support is peeled off,
A casting rubber printing plate material was pressed against the surface with a hand roller. At this time, since the organic solvent was not used, the working environment was not deteriorated, and the bonding could be quickly performed.
Thereafter, in the same manner as in Example 1, the separator on the adhesive-processed surface on the remaining one side of the support was peeled off and adhered to the carrier sheet with a hand roller to prepare a laminate for cardboard printing. The adhesive strength between the photosensitive layer and the support of the printing laminate was 0.98 kgf / cm.

(Comparative Example 1) The base film of a flexographic plate material “Eraslon (registered trademark)” GT300 manufactured by Tokyo Ohka Kogyo Co., Ltd. was peeled off, and a plate making machine manufactured by Toray Industries, Inc., model “FT” was used.
After performing back exposure by irradiating ultraviolet rays for 2 minutes from the base film peeling surface side in the exposure unit section of W350LII ”, a closed-cell natural rubber base“ Supersoft (registered trademark) ”manufactured by Kureha Elastomer Co., Ltd. (sheet thickness Trichlorethylene was applied to the rubber surface (4 mm, Shore A hardness 38 °, with single-sided adhesive processing), and the back-exposed plate was pressed and bonded with a hand roller.
The odor of the solvent spread around. Also, it took 15 minutes for the solvent to be dried to stabilize the adhesive strength and to start the pattern exposure in the next step.

[0029]

According to the present invention, the support for a printing plate material can be obtained by immediately laminating a printing plate material without using an organic solvent at a plate making work site to obtain a laminate for cardboard printing. it can.

Claims (3)

[Claims] 1. A cardboard printing plate support comprising an adhesive layer and a separator covering the adhesive layer on both sides. 2. The support for a cardboard printing plate according to claim 1, wherein the support has a thickness of 1 to 10 mm. 3. A cardboard printing laminate comprising a printing plate, a support and a carrier sheet laminated on each other, wherein the support has an adhesive layer on both sides, and the printing plate, the carrier sheet and the carrier are provided by the adhesive layer. A laminate for cardboard printing characterized by being laminated.