JP2945453B2 - Partial unevenness image forming material and partial unevenness image forming method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a partial uneven image forming material for obtaining a partial uneven image having an uneven portion and a smooth portion, and a partial uneven image forming method using the same. About.

[Problems to be Solved by the Related Art and the Invention] Conventionally, a pattern forming method by sandblasting has been used as a method of forming a pattern by partially making the surface of a plastic film or the like uneven to give a matte property. There are known (a) a method using a pattern paper, (b) a method using a resist made of a photosensitive resin, and (c) a method using an ink protective film by printing.

In these methods, in the case of (1) and (a), a pattern is cut out by hand or the like, and this is cut out and bonded to a plastic film or the like using an adhesive.
In the case of (1), a photoresist is formed on the surface of a plastic film or the like using a photosensitive resin, and in the case of (3), a protective film having a required pattern is formed by directly printing or transferring on the surface of the plastic film or the like. Do
(2) Sand is blown onto the surface of the plastic film by sand blasting to form a rough surface at a place not covered with the protective film. (3) The protective film such as a pattern is peeled off with a solvent or the like and further adhered. A desired pattern is obtained by washing the silica sand powder with water and drying.

That is, since the above three methods require sandblasting after forming a protective film by any method, it is difficult to say that a required pattern can be easily obtained.
It was not suitable for high-mix low-volume production in terms of cost.

In addition to the sandblasting method, the embossing method of pressing an embossing roll directly on the surface, the method of applying a transparent paint on the surface in an uneven shape, and the matting agent There is known a method of applying a paint containing, for example. In the case of the embossing method, a required engraving must be performed on the embossing roll in order to partially impart a mattness, which is not suitable for multi-product small-quantity production. In the case of applying a paint, a printing method such as screen printing is used, so a printing plate must be prepared, which is also unsuitable for small-quantity multi-product production.

In addition, a method of providing irregularities on the surface of a plastic film or the like by a transfer mat method is also known. This is to apply a photo-curable resin to a plastic film, etc., and to overlay the embossed film etc. while the resin is uncured, and to cure it in that state to copy the uneven shape of the embossed film etc. The method is described in detail in JP-A-64-51174. However, all of these methods relate to a method of copying all the concavo-convex shapes of an embossed film or the like by full-surface exposure. A pattern must be given, which is also unsuitable for small-quantity multi-product production.

Japanese Patent Application Laid-Open No. 63-151498 describes a method for processing a partial mat. In this method, the uneven shape is transferred by hot stamping. However, it is necessary to manufacture an inscription corresponding to a required pattern, which is also unsuitable for small-quantity multi-products.

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and has as its object to provide a partially uneven image forming material capable of forming a partially uneven image having a partially uneven shape very easily.

Furthermore, the present invention provides a method for forming a partial uneven image with good profitability even in a small quantity and a large variety using such a partial uneven image forming material, and a desired partial uneven image at a desired position of an article. It is an object of the present invention to provide a method that can easily form a.

[Means for Solving the Problems] The above object is achieved by the present invention.

That is, the partially uneven image-forming material of the present invention comprises a substrate having an uneven shape on one surface, a photocurable resin layer laminated on the substrate, and a light transmitting layer laminated on the photocurable resin layer. The photocurable resin layer has an interfacial adhesive force with the substrate smaller than its internal cohesive force and an interfacial adhesive force with the substrate smaller than the interfacial adhesive force with the light transmissive member. The light-curable resin layer is exposed by superimposing the original on the light-transmitting member, and exposing the base material at a temperature higher than the softening temperature of the non-exposed part and lower than the softening temperature of the exposed part, thereby exposing only the exposed part. Is cured into an uneven shape corresponding to the uneven shape of the base material to form a matte portion, and a non-exposed portion is smoothed.

Further, the method for forming a partially uneven image of the present invention uses the partially uneven image forming material of the present invention in which a photocurable resin layer and a light transmitting member are sequentially laminated on a substrate having an uneven shape on one surface, After curing the exposed portion of the photocurable resin layer by overlaying the original on the photosensitive member and curing the exposed portion, the base material is peeled at a temperature higher than the softening temperature of the non-exposed portion and lower than the softening temperature of the exposed portion,
Only the exposed portion has an uneven shape corresponding to the substrate to form a matte portion, and the non-exposed portion forms a smoothed partially uneven image, and in some cases, furthermore, the entire photocurable resin layer Is exposed and cured.

Furthermore, before re-exposure of the entire photo-curable resin layer on which the partial concavo-convex image has been formed, the photo-curable resin layer is laminated on the surface of the article, and then exposed through a light-transmitting member to expose the photo-curable resin layer. Is cured and fixed to the surface of the article to form a partially uneven image on the article.

 Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the partially concavo-convex image forming material 10 of the present invention has a structure in which a substrate 1 having a concavo-convex shape on at least one surface, a photocurable resin layer 2, and a light-transmitting member 3 are sequentially laminated. doing.

The substrate 1 is provided with irregularities by sandblasting or the like at least in a portion where the photocurable resin layer 2 is laminated, and has an appropriate release property. Although the material is not particularly limited, examples include a polyvinyl chloride film, a polyethylene terephthalate film, an acetate film,
A glass plate or the like can be raised. In some cases, release properties can be imparted by a release agent or the like.

The photocurable resin layer 2 generally contains a photopolymerizable compound, that is, a polymer, an oligomer or a monomer having a radical polymerizable double bond, and a photopolymerization initiator or a sensitizer. And non-reactive organic polymer binders, thermal polymerization inhibitors, and other additives.

Particularly preferred photopolymerizable compounds for the purpose of the present invention are methacrylic acid, methyl methacrylate, butyl methacrylate, methacrylic acid esters such as 2-hydroxyethyl methacrylate, styrene, N-vinylpyrrolidone,
Acrylonitrile, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, 1,6
-Low molecular weight photopolymerizable compounds such as hexanediol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, or high molecular weight compounds such as urethane acrylate, epoxy acrylate, polyester acrylate, and unsaturated polyester. It is a photopolymerizable compound, and one or more of these can be used.

Examples of the photopolymerization initiator include benzophenones such as benzophenone and 3,3-dimethyl-4-methoxybenzophenone, benzoins such as benzoin isopropyl ether and benzyl dimethyl ketal, 2-chlorothioxanthone, and 2,4-diethylthioxane. One or two types of conventionally known photopolymerization initiators such as thioxanthone-based photopolymerization initiators such as acetophenones such as 2-hydroxy-2-methyl-1-phenylpropan-1-one and 1-hydroxycyclohexylphenyl ketone; The above can be used.

As the organic polymer binder, a non-reactive polymer that is thermoplastic and has excellent compatibility with the photopolymerizable compound, for example, polyvinyl chloride, polymethacrylic acid, polyvinyl ether, polymethacrylate, polyamide, Urethane resin, epoxy resin and the like can be used.

Hydroquinone, P-methoxyphenol, and the like can be used as the thermal polymerization inhibitor.

Further, as an additive, a dye or a pigment which does not inhibit photocuring can be added.

Examples of the light transmitting member 3 include a polyethylene terephthalate film, an acetate film, a polyvinyl chloride film, and a glass plate. If necessary, an easy adhesion treatment such as a corona treatment can be performed.

Here, the interfacial adhesive force between the base material 1 and the photocurable resin layer 2 is not dependent on whether the photocurable resin layer 2 has been cured or uncured.
It is necessary that the interfacial adhesion between the substrate and the photocurable resin layer is smaller than the interfacial adhesion between the photocurable resin layer 2 and the light transmitting member 3.

A document 4 having a predetermined light-impermeable positive or negative pattern, characters 4a, etc. formed on the light-transmissive member 3 side of the partially concavo-convex image forming material 10 as shown in FIG. The original 4 is brought into close contact and exposed through the original 4. As a result, the photocurable resin in the exposed portion 2a is hardened and the softening temperature rises, so that a difference between the softening temperature and the unexposed portion 2b occurs. So the third
When the substrate 1 is peeled off as shown in the figure, the exposed portion 2a keeps the shape where the irregularities of the substrate 1 are transferred at a temperature between the softening temperature of the exposed portion 2a and the softening temperature of the unexposed portion 2b. The non-exposed portion 2b flows due to the elimination of the forcing from the outside, and the uneven shape disappears and becomes smooth. That is, it is possible to obtain a partially uneven member 20 in which only the exposed portion 2a has an uneven shape corresponding to the uneven shape of the substrate 1, and the unexposed portion 2b is uncured and smooth.

Further, as shown in FIG. 4, when the partial uneven member 20 is entirely exposed, the non-exposed portion 2b is cured in a smooth state, and the partially uneven member having a partially uneven shape and imparting a matte property is provided. twenty one
Can be obtained.

Next, in order to form a partially uneven image on the article 5 using the partially uneven image forming material 10 of the present invention, a predetermined uneven portion is formed on a predetermined portion of the article 5 on which an image is to be formed as shown in FIG. The photocurable resin layer of the member 20 is attached by utilizing the adhesiveness of the unexposed portion 2b. Thereafter, by exposing through the light transmitting member 3, the non-exposed portion 2b is cured and fixed to the surface of the article 5, thereby forming a partially uneven image.

If a flexible material is used as the light transmissive member 3, such a partial concavo-convex image can be formed not only on a planar portion but also on a curved surface.

Further, the partial uneven member 20 according to the present invention is attached to the window glass, and the entire surface is exposed to sunlight or the like to be fixed to the surface of the window glass, whereby both the design property and the scattering prevention effect can be provided.

[Examples] Hereinafter, the present invention will be described with reference to examples.

Example 1 A photocurable resin solution having the following composition was prepared.

Polyester (Toyobo Byron 200) 60 g Tetraethylene glycol diacrylate 30 g Benzophenone 2.6 g 4,4'-diethylaminobenzophenone 0.4 g Methyl ethyl ketone 86.4 g Toluol 86.4 g It was dried in an oven at 100 ° C. for 90 seconds to obtain a photocurable resin layer 2 having a thickness of about 10 μm.

The processed surface of the sandblasted polyester film 1 was laminated on the photocurable resin layer 2 at 50 ° C. and 3 m / min using a heat laminator to obtain a partially uneven image forming material 10 as shown in FIG. Obtained.

The original 4 is brought into close contact with it as shown in Fig.
After exposure from a W high-pressure mercury lamp for 25 seconds, the polyester film 1 subjected to sandblasting was peeled off to obtain a partial mat film 20 in which the exposed portion was matted.

Furthermore, the entire surface was exposed to cure the unexposed photocurable resin.

The partial mat film 21 thus easily obtained
Has the same appearance as a partial mat film made through a complicated process by the conventional sand blast method,
Both matting properties and resolution were satisfactory.

Example 2 A photocurable resin solution was prepared in the same manner as in Example 1, and
It was applied and dried on a 75 μm polyester film 3 which had been subjected to EC treatment to obtain a photocurable resin layer 2 having a thickness of about 10 μm. Further, a polyvinyl chloride film 1 embossed in a satin shape was laminated thereon at 50 ° C. at 3 m / min to obtain a partially uneven image forming material 10 as shown in FIG.

The original 4 is brought into close contact with it as shown in Fig.
After exposing for 25 seconds from a W high-pressure mercury lamp, the polyvinyl chloride film 1 was peeled off to obtain a partial mat film 20 in which the exposed portion had a satin finish.

Furthermore, the entire surface was exposed to cure the unexposed photocurable resin.

By this method, it was possible to easily obtain a clear portion of any pattern and a blank character on the satin finish.

Example 3 The photocurable resin layer of the partial mat film obtained in the same manner as in Example 1 was laminated at 50 ° C. at 3 m / min using a heat laminator so as to match the glass surface. 2m from a 2kW high pressure mercury lamp 1m away through a light transmissive film
The entire surface was exposed for 5 seconds and fixed on the glass surface to form a partially matte image on the glass surface as shown in FIG.

By fixing the partial mat film to the glass plate 5 in this manner, a partially matte image was easily obtained on the glass plate.

Example 4 In the same manner as in Example 1, after obtaining a partially matte film 20 in which the exposed portion became matte, the photocurable resin layer of this partial matte film was fitted to the window glass to the glass surface. And pasted. Furthermore, the entire surface was exposed to sunlight and fixed on the surface of the window glass.

By fixing the partial mat film to the window glass in this way, it was possible to have both the design property and the scattering prevention effect.

[Effects of the Invention] As is clear from the above embodiments, according to the present invention,
It is possible to easily obtain a partial uneven member such as a partial mat sheet having a desired pattern simply by exposing and partially exposing the partially uneven image forming material and the original, thereby greatly improving workability. This is effective in reducing costs in the production of small-quantity multi-products.

In addition, since the partially uneven image according to the present invention can be fixed to another article without using an adhesive or the like again, another article can be easily provided with a partially matte image, and the article can have decorativeness. And a scattering prevention effect.

[Brief description of the drawings]

FIG. 1 is a sectional view of a partial image forming material according to the present invention, and FIG.
4 are diagrams showing one embodiment of the method of forming a partial uneven image according to the present invention, and FIG. 5 is a diagram showing one embodiment of the method of forming a partial image according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Photocurable resin layer 3 ... Light transmissive member 4 ... Original 5 ... Article 10 ... Partial image forming material 20, 21 ... Partially uneven member

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03F 7/004 G03F 7/09

Claims (4)

(57) [Claims] 1. A base material having an uneven shape on one surface, a photocurable resin layer laminated on the base material, and a light transmitting member laminated on the photocurable resin layer, The photocurable resin layer has an interfacial adhesive force with the base material smaller than its internal cohesive force, and an interfacial adhesive force with the base material smaller than the interfacial adhesive force with the light transmissive member. An original is superposed and exposed on the light transmitting member, and the base material is peeled off at a temperature higher than the softening temperature of the non-exposed portion and lower than the softening temperature of the exposed portion, so that only the exposed portion has the uneven shape of the base material. A partially uneven image forming material characterized in that the material is hardened into an uneven shape corresponding to the above, becomes a matte portion, and an unexposed portion is smoothed. 2. A partially uneven image forming material according to claim 1, wherein a light-curable resin layer and a light-transmitting member are sequentially laminated on a substrate having an uneven shape on one surface, and a document is formed on said light-transmitting member. After the exposed portion of the photocurable resin layer is cured by overlapping, the base material is peeled at a temperature higher than the softening temperature of the non-exposed portion and lower than the softening temperature of the exposed portion, and only the exposed portion is exposed. A method for forming a partial concavo-convex image, comprising: forming a concavo-convex image having a concavo-convex shape corresponding to the base material, wherein a non-exposed portion is smoothed. 3. A method for forming a partial uneven image, comprising forming a partial uneven image by the method for forming a partial uneven image according to claim 2, and exposing and curing the entire photocurable resin layer. 4. The photocurable resin composition according to claim 2, wherein a partial image is formed, the photocurable resin layer is laminated on the surface of the article, and the photocurable resin layer is exposed through the light transmissive member. A method for forming a partial uneven image, wherein the non-exposed portion of the resin layer is cured and fixed to the surface of the article to form a partial uneven image on the article.