JPH06143522A - Material for display - Google Patents

Abstract

PURPOSE:To manufacture a material for display, handling of which is facilitated extremely and which has excellent weathering resistance, by oppositely facing and thermocompression-bonding the intermediate layer side of a film base material and the photosensitive resin layer side of a sensitive film member. CONSTITUTION:A self-adhesive or adhesive layer 1 is laminated on one surface of a polyester film 2, and an intermediate layer 3 containing one kind or more of 100 pts.wt. of a saturated polyester resin soluble in an organic solvent, acrylic polyol and polyester polyol and 2-30 pts.wt. polyvalent isocyanate is laminated on the other surface of the polyester film 2, thus molding a film base material 6. A photosensitive resin layer 5 containing a photopolymerizable compound having an ethylene unsaturated bond is laminated separately on a plastic film 4, thus molding a sensitive film member 7. The intermediate layer 3 side of the film base material 6 and the photosensitive resin layer 5 side of the sensitive film member 7 are faced oppositely, and thermocompression-bonded, thus manufacturing a material for display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive film obtained by laminating a photosensitive resin layer on a plastic film and an intermediate layer side of a film substrate having an adhesive or adhesive layer on one side of the polyester film and an intermediate layer on the opposite side. The present invention relates to a display material obtained by thermocompression bonding with members facing the photosensitive resin layer.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
In order to make a display using a photosensitive film in which a photosensitive resin is laminated in a sheet shape on a plastic cover film such as Cromaline (a product of DuPont), a metal plate such as a metal plate coated directly with a metal plate or the like is used. A photosensitive film was thermocompression-bonded on the above, and an image was formed by subjecting it to exposure, toning, and the like to obtain a display. However, according to this method, the object to which the photosensitive film is thermocompression-bonded is actually limited to a plate-like object and its size is also limited.

Therefore, a plastic film provided with an adhesive layer is used, a photosensitive film is thermocompression-bonded to the surface opposite to the adhesive layer, and an image is formed by processing such as exposure and toning, and then the adhesiveness is utilized to obtain another image. The method of making a display by sticking it on an article has come to be adopted. As the plastic film used for this purpose, a vinyl chloride film has been used because of its good adhesiveness to the photosensitive resin.

However, according to this method, the photosensitive resin was cracked or the photosensitive resin was peeled off from the plastic film due to long-term outdoor exposure. This is mainly due to the dimensional change of the vinyl chloride film due to heat and poor weather resistance. Therefore, it was attempted to use a polyester film which is relatively inexpensive and has good dimensional stability and weather resistance, but the adhesion between the film and the photosensitive resin was poor and it could not be put to practical use.

In order to solve this, it is conceivable to use a liquid photosensitive resin or a polyester film which has been subjected to an easy adhesion treatment for UV ink, but these are adhered to the photosensitive resin after curing, Designed for the purpose of solvent resistance, when a sheet-shaped photosensitive resin such as cromarin is thermocompressed, the adhesion with the uncured photosensitive resin is poor and the cover of the photosensitive resin When the film was peeled off, the unexposed part was peeled off from the easy-adhesion layer together with the cover film, and the work was sometimes restarted.

Further, when an image is formed by toning or the like, the photosensitive resin under the toner is not completely cured by post exposure and remains uncured for a while. Therefore, the easy-adhesion layer is gradually attacked by low molecular weight substances such as monomers contained in the photosensitive resin, and when the photosensitive resin is completely solidified by long-term outdoor exposure, the photosensitive resin peels off and the image is lost, etc. There was a problem. Further, there was a case in which water gradually permeated from the end portion due to long-term outdoor exposure and the photosensitive resin gradually peeled off.

The present invention has been made in order to overcome the above-mentioned conventional drawbacks, and one side of a polyester film is provided with a photosensitive resin of a photosensitive film and an intermediate layer showing good adhesion before and after curing. By providing it, it is an object to provide a display material which is extremely easy to handle, can obtain a display at any place, and has excellent weather resistance.

[0008]

The above objects are achieved by the present invention. Hereinafter, description will be given with reference to the drawings. That is, in the present invention, an adhesive or adhesive layer (1) is laminated on one side of a polyester film (2), and an organic solvent-soluble saturated polyester resin, acrylic polyol, polyester polyol is laminated on the other side of the polyester film (2). 100 parts by weight of one or more of the above, and an intermediate layer (3) side of a film substrate (6) obtained by laminating an intermediate layer (3) containing 2 to 30 parts by weight of a polyisocyanate, and a plastic. A photosensitive resin layer (5) side of a photosensitive film member (7) obtained by laminating a photosensitive resin layer (5) containing a photopolymerizable compound having an ethylenically unsaturated bond on the film (4), They are opposed and thermocompression bonded.

As the adhesive or adhesive layer 1, any of acrylic, silicone, rubber adhesives or chemically reactive adhesives can be used, but it is weather resistant so that it can withstand long-term exposure outdoors. A good one is preferable. Further, a pigment may be added to the adhesive or the adhesive layer 1 in order to obtain a concealing property for hiding the color of the base.

The polyester film 2 is kneaded with a pigment,
When an opaque material such as foam is used, the underlying color can be hidden, so that more effective design can be obtained. Also,
Even if a transparent or translucent polyester film is used, the same effect can be obtained by adding a pigment to the adhesive or adhesive layer 1 as described above.

The intermediate layer 3 contains 100 parts by weight of one or more kinds of organic solvent-soluble saturated polyester resin, acrylic polyol, and polyester polyol, and 2 to 30 parts by weight of polyisocyanate. Further, other resin may be added to the intermediate layer 3 to the extent that the physical properties thereof are not impaired.

As the saturated polyester resin soluble in an organic solvent, those having a molecular weight of 10,000 to 25,000 are soluble,
It is preferable in terms of physical properties after curing, but it is not limited to this depending on the amount of polyvalent isocyanate and the amount of acrylic polyol, polyester polyol, etc. added as necessary. When the acrylic polyol and the polyester polyol are used alone, some of them may cause stickiness of the coating film, but such one is preferably used together with the saturated polyester.

As the polyvalent isocyanate, various compounds can be used as long as they are compounds having two or more isocyanate groups in the molecule, and 2 to 30 parts by weight is added to 100 parts by weight of the above resin. If the polyisocyanate becomes excessive, when the sheet-shaped photosensitive resin layer 5 is thermocompression-bonded thereon, the adhesion between the photosensitive resin layer 5 and the intermediate layer 3 before curing is poor and the photosensitive resin layer 5 As the upper plastic film 4 is peeled off, the unexposed portion comes to be peeled off. On the other hand, when the polyvalent isocyanate is insufficient, the required curing performance cannot be obtained, so that sufficient weather resistance, water resistance and monomer resistance cannot be obtained. Further, a pigment may be added to the intermediate layer 3 for the purpose of preventing blocking of the coating film and imparting hiding property. Further, dyes and pigments may be added for the purpose of improving the color rendering of the image.

Examples of the plastic film 4 include polyester film and polypropylene film. The photosensitive resin may be of any type as long as it has sufficient transparency in the photosensitive wavelength range and appropriate releasability from the photosensitive resin, but a polyester film is most preferable from the viewpoint of workability and the like.

The photosensitive resin layer 5 containing a photopolymerizable compound having an ethylenically unsaturated bond is generally composed of a photopolymerizable compound, a photopolymerization initiator and an organic polymer binder, and if necessary, Contains thermal polymerization inhibitor and other additives.
Here, as the photopolymerizable compound, methacrylic acid esters such as methyl methacrylate and butyl methacrylate,
One or more of low molecular weight photopolymerizable compounds such as 1,6-hexanediol diacrylate, trimethylolpropane triacrylate and pentaerythritol triacrylate, and high molecular weight photopolymerizable compounds such as unsaturated polyester are used. it can.

To prepare the display material of the present invention using these materials, first, the polyester film 2 is used.
The intermediate layer 3 is provided on one side by a known laminating means such as coating, and the adhesive or adhesive layer 1 is further provided on the opposite side to prepare the film substrate 6. A release paper is provided on the adhesive or adhesive layer 1 as needed. Next, a photosensitive film member 7 in which a photosensitive resin layer 5 is provided on the plastic film 4 by a known laminating means is produced, and the photosensitive resin layer 5 side and the intermediate layer 3 side of the film base material 6 are formed. A display material is manufactured by facing and thermocompression bonding.

[0017]

[Operation] Using the display material composed of the above, the original is superposed on the plastic film and exposed, and then the plastic film is peeled off and toned on the photosensitive resin to form an image. A display can be easily obtained at any place by exposing and then adhering it to another article by virtue of the adhesiveness of the display material. A multicolor image can be obtained by repeating the lamination of the photosensitive film members and the toning.

[0018]

EXAMPLES The present invention will be described below with reference to examples. [Example] An adhesive liquid having the following composition was prepared. SK Dyne 1022 (manufactured by Soken Chemical Industry Co., Ltd.) 100 g Ethyl acetate 50 g Toluol 50 g This solution was coated on a 100 μm white polyester film with a wire bar and dried in an oven at 100 ° C. for 2 minutes to give an adhesive layer of about 10 μm. Obtained. Further, a release paper was laminated on this adhesive layer.

A liquid having the following composition was prepared. Byron 200 (manufactured by Toyobo Co., Ltd.) 10 g Takenate D-140N (manufactured by Takeda Pharmaceutical Co., Ltd.) 1.5
g Methyl ethyl ketone 48.5 g Toluol 40 g Next, the above solution was applied to the surface of the white polyester film having an adhesive layer opposite to the adhesive layer with a wire bar and dried in an oven at 100 ° C. for 1 minute to give about 1
A μm interlayer was obtained. Furthermore, it was kept in an oven at 60 ° C. for 12 hours to accelerate the curing of the isocyanate.

The intermediate layer was laminated at 100 ° C. so that a photosensitive resin layer of chromalin (manufactured by DuPont) was faced to obtain a display material. An image was formed by superimposing an original on the obtained display material to partially expose and cure the photosensitive resin layer, peeling off the cover film of the photosensitive resin layer and further toning. At this time, peeling of the cover film was very easy. After that, the entire surface was exposed from the image side. The release paper of the display material on which the image was formed was peeled off and attached to an aluminum plate to obtain a display. The obtained display was subjected to an ultraviolet irradiation test (500 hours) using a xenon lamp, 40
An immersion test (1 week) in water at 0 ° C. was conducted, and there was no abnormality in any of them, and good adhesion was exhibited between the photosensitive resin layer and the intermediate layer.

[Comparative Example 1] Commercially available vinyl chloride film for marking with an adhesive and chromin (product of DuPont)
The photosensitive resin layers of 1 were laminated so as to face each other at 100 ° C. to obtain a display material. An image was formed by superimposing an original on the obtained display material to partially expose and cure the photosensitive resin layer, peeling off the cover film of the photosensitive resin layer and further toning. At this time, peeling of the cover film was very easy. After that, the entire surface was exposed from the image side. The display material on which the image was formed was attached to an aluminum plate to obtain a display. When the obtained display was subjected to an ultraviolet irradiation test using a xenon lamp (500 hours) and an immersion test in water at 40 ° C. (1 week), peeling of the photosensitive resin layer occurred in both the ultraviolet irradiation test and the immersion test.

[Comparative Example 2] A commercially available easy-adhesive polyester film for UV ink was provided with a pressure-sensitive adhesive layer similar to that of the example on the surface opposite to the easy-adhesive surface, and release paper was laminated. Next, a display material was obtained by laminating at 100 ° C. so that the easily-adhesive surface and the photosensitive resin layer of cromarin (product of DuPont) face each other. An image was formed by superimposing an original on the obtained display material to partially expose and cure the photosensitive resin layer, peeling off the cover film of the photosensitive resin layer and further toning. At this time, when the cover film of chromalin was peeled off, the unexposed portion tended to peel off together with the cover film, which made the work extremely difficult. Then, the entire surface was exposed from the image side, and the display material on which the image was formed was attached to an aluminum plate to obtain a display. The obtained display was subjected to an ultraviolet irradiation test using a xenon lamp (500 hours) and a dipping test in water at 40 ° C. (1 week). As a result, the photosensitive resin layer peeled off in the dipping test. In the ultraviolet irradiation test, some peeling occurred on the toned part.

[0023]

As is apparent from the above examples, the display material according to the present invention is capable of exposing the photosensitive resin layer to light,
Adhesion to the film substrate is good regardless of unexposed, so that the plastic film on the photosensitive resin layer can be peeled off very easily. In addition, it is a very easy work of forming an image in a prescribed way and then attaching it to another article, it has excellent weather resistance, and a display that does not seep water, cracks or defects in the image even after long-term outdoor exposure. Can be obtained at any place.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a display material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Adhesive or adhesive layer 2 ... Polyester film 3 ... Intermediate layer 4 ... Plastic film 5 ... Photosensitive resin layer 6 ... Film base material 7 ... Photosensitive film member

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G03F 7/027 512 513

Claims (1)

[Claims] 1. A polyester film (2) having an adhesive or adhesive layer (1) laminated on one side thereof, and an organic solvent-soluble saturated polyester resin, acrylic polyol, polyester polyol on the other side of the polyester film (2). 100 parts by weight of one or more of the above, and an intermediate layer (3) side of a film substrate (6) obtained by laminating an intermediate layer (3) containing 2 to 30 parts by weight of a polyisocyanate, and a plastic. Photosensitive resin layer (5) containing a photopolymerizable compound having an ethylenically unsaturated bond on the film (4)
A material for a display, characterized in that a photosensitive film member (7) formed by laminating the above is opposed to the side of the photosensitive resin layer (5) and subjected to thermocompression bonding.