JPH0142840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a metallized transfer sheet on which a metallized layer is patterned in accordance with a printed pattern.

<Conventional technology> Conventionally, printing has been used to attach letters, pictures, patterns, etc. to the surface of transfer objects such as synthetic resin sheets, molded products, wood, paper, and fabric, and metal vapor deposition has been used to add arbitrary metallic luster patterns. Foil stamping is a separate process. Therefore, a large number of steps are required, which makes the product extremely expensive, and there are also many technical difficulties in registering complicated designs, patterns, etc. with the vapor-deposited transfer portion of foil stamping.

As a transfer sheet that simultaneously transfers an ink design part and a metal vapor deposited part in one transfer, for example, as shown in Japanese Patent Application Laid-Open No. 132912/1982,
After printing the pattern layer, a water-soluble resin is applied to areas where a vapor deposition layer is not required, and then vapor deposition is performed on the entire surface.
A method of dissolving the water-soluble resin by washing with water and removing unnecessary deposited layers is used. In this method, it is actually difficult to perfectly align the first pattern layer with the next printed water-soluble resin because of the expansion and contraction of the film. Therefore, it is impossible to provide a structure in which the vapor deposition layer 13 is provided only on the pattern layer 12 (FIG. 6), so normally the water-soluble resin 14 is printed first, and the printing layer 13 is placed on top of the pattern layer 12. A method is used in which a pattern layer 12 of a size larger than the alignment accuracy is printed and then washed with water (FIG. 7). In this method, since water is difficult to penetrate into the overlapping portion of the water-soluble resin 14 and the pattern layer 12, there is a problem in that it takes time and effort to wash it off.

<Problems to be Solved by the Invention> The present invention solves the above-mentioned difficulties, allows simultaneous transfer of the ink design part and the metal deposited part in a single transfer, and transfers the metal deposit part to the necessary part corresponding to the design. To provide a transfer sheet on which a complicated pattern can be applied.

<Means for Solving the Problems> The present invention provides a heat-resistant and chemical-resistant film base material 1 with a release layer 2 that is easily peelable from the film base material 1 on one side, and an arbitrary pattern layer on the film base material 1. 3 is printed with ink, a protective layer 4 is provided on the entire surface or a portion thereof, and then a positive type photosensitive resin layer 6 is applied to the areas where the metal vapor deposited layer is not required. Next, a metal vapor deposited layer 5 is provided on the entire surface, and The area coated with the photosensitive resin layer 6 is exposed to light, and the photosensitive resin layer 6 is dissolved and removed using a developer. In this case, the photosensitive resin layer is exposed to light after a vapor deposited layer is provided on the entire surface. Although exposure is generally carried out from the film base 1 side, it may also be carried out separately from the metal vapor deposited layer 5. After that, the present invention relates to a method of manufacturing a partially metallized transfer sheet having a heat-sensitive adhesive layer 7 provided on its entire surface.

The present invention will be explained in more detail below using the drawings. As shown in FIG. 1, a release layer 2 having better releasability than the film base material 1 is coated on a film base material 1 having heat resistance, water resistance, and chemical resistance, and then a desired pattern is applied using ink. Print layer 3. Next, release layer 2
Then, a protective layer 4 is applied to the entire surface of the pattern layer 3 or to the size of the portion covering the pattern layer 3. This protective layer 4 serves to protect the pattern layer 3 during the next step of metal vapor deposition and to protect the pattern layer 3 during the step of partially removing the metal vapor deposited portion 5.

Next, as shown in FIG. 2, a photosensitive resin layer 6 is applied in a desired pattern to unnecessary parts of the metal vapor deposition layer in accordance with the outline of the pattern layer 3, and a metal vapor deposition layer 5 is applied thereon by vacuum evaporation. Apply to the entire surface. This photosensitive resin layer 6
When irradiated with light, it becomes soluble in weak alkaline liquids, alcohol, etc., so it is necessary to expose it to light after metal vapor deposition.
Remove with a prescribed solution. Note that near ultraviolet light is used as the light to be irradiated, but in the case of the present invention, if exposure is performed from the film base 1 side, the amount of light reaching the photosensitive resin layer can be expected to be about 30 to 40% of the incident light. However, even if the exposure is performed from the side of the metal vapor deposited layer 5, an amount of light reaching about 10% can be achieved, so that the photosensitive resin layer can be softened.

Next, as shown in FIG. 4, a heat-sensitive adhesive layer 7 having heat-sensitive adhesive strength is applied to the object to be transferred to obtain a metal vapor-deposited transfer sheet.

Here, as shown in FIG. 5, if the adhesion between the metal vapor deposited layer 5 and the heat-sensitive adhesive layer 7 is poor, the heat-sensitive adhesive layer 7 is applied after the subbing layer 8 is applied on the metal vapor deposited layer 5. It is also possible.

As the film base material 1, polyester, polypropylene film, etc. are practically excellent as films that have excellent heat resistance, water resistance, and chemical resistance; It is possible to use composite films of resins. Next, as the peeling layer 2, it is easier to peel than the film base material 1 and may be transparent or colored.
During the transfer process, the transfer material is bonded with a force weaker than the adhesive force between the transfer target and the heat-sensitive adhesive layer 7, and when the metal vapor deposited layer 5 is removed, it has removability to the extent that it does not peel off from the film base material 1. Must be made of chlorinated rubber,
Thermoplastic acrylic resin, chlorinated polyolefin,
Vinyl resin and cyclized rubber can be used, and these two
It is also possible to adjust the required peeling performance and adhesive strength by mixing more than one species.

Next, the ink for the pattern layer 3 is made of a resin that has sufficient adhesion to the release layer 2. The resin may be the same as the resin used for the release layer 2, and other resins may include polyester resin, urethane resin, etc. , maleic acid resin, alkyd resin, and ethylene-vinyl acetate resin can also be used, and cellulose resin ink containing these may also be used. The pigment used in the ink should have good water resistance and chemical resistance, and should not discolor during vacuum deposition.

Next, the protective layer 4 of the pattern layer 3 is provided on the entire surface or on the necessary parts, but this protective layer 4 may be transparent or colored, and it can be used to improve adhesion with metal during the next step of metal vapor deposition. It serves as a protective layer for the pattern layer 3 and protects the pattern layer 3 when the metal vapor deposited layer 5 is removed. Therefore, effective resins include one-component alkyd resins, phenolic resins, vinyl acetate resins, vinyl chloride resins, vinyl chloride-vinyl acetate copolymers, epoxy resins, acrylic resins, and urethane resins. Alternatively, a mixture of these may be used. Further, a cellulose derivative may be added as an additive. In addition, as reaction-curing resins, thermosetting acrylic resins, phenolic resins, amino resins, and isocyanates are used, which are heat-cured using amino alkyd resins, amino resins, epoxy resin anhydrides, etc., which undergo a crosslinking reaction by heating and drying. Epoxy resins, which are cured with water, and urethane resins, which are made by reacting various polyols with isocyanates, are effective.
Reaction curing is performed by heating at ~180°C for 5 to 40 seconds.

Furthermore, a photosensitive resin layer 6 is provided on a desired pattern in synchronization with the above-mentioned pattern. As the photosensitive resin layer, for example, a positive-positive type photoetching resist can be used, and the photosensitive group is a diazo group or an azide group. Photosensitive resin can be used. Generally, O-quinonediazide-novolak-based photosensitive materials are mainly used, but there are other azide compounds that can be used as photosensitive agents such as 2,6-dichloro-4-nitro-
Azidobenzene, azido diphenylamine, 4,
Examples include 4'-diazide diphenylamine.

As the next step, a metal vapor deposition layer 5 is formed on the entire surface by ordinary vacuum vapor deposition. Aluminum, tin, silver, copper, etc. are used as the metal, for example, in a vacuum at 10 ^-4 ~
Vapor deposition is carried out to a film thickness of about 20 to 200 mμ under conditions of 10 ^-6 mmHg and a deposition metal heating temperature of 1400 to 2000°C.
A film with metallic luster is obtained. When the foil thus obtained is irradiated with ultraviolet rays and developed with a weak alkaline developer, the photosensitive resin layer is converted into an alkali-soluble substance and is dissolved and removed.

Here, the weakly alkaline developer is a salt of a strong alkali and a weak acid, such as sodium phosphate, sodium bicarbonate, or sodium carbonate, which gives good results. In addition, alcohols and the like can be used as the developer. As the final step, the entire surface of the heat-sensitive adhesive layer 7 is coated. As the heat-sensitive adhesive 7, a heat-sensitive resin suitable for the object to be transferred is appropriately used. For example, if the material to be transferred is polystyrene, acrylic resin,
Heat-sensitive adhesives such as salt-vinyl acetate resin, and when the object to be transferred is a polyolefin resin, chlorinated polypropylene, ethylene vinyl acetate, etc. are effective.

In addition, these heat-sensitive adhesive layers 7 form the ink protective layer 4.
If adhesion is required, a polyester resin, salt-vinyl acetate resin, polyurethane resin, epoxy resin, etc. is applied in advance as the undercoat layer 8,
It is effective to apply a heat-sensitive adhesive layer afterwards.

The method of thermally transferring the metal vapor-deposited transfer sheet of the present invention having the above-mentioned structure to the transfer target is to overlap the heat-sensitive adhesive layer 7 of the metal vapor-deposit sheet in contact with the transfer target surface, heat and pressurize it, and after cooling. By peeling off the film base material from the object to be transferred, the film is peeled off along the peeling layer 2 as a boundary and transferred to the surface to be transferred, completing the painting.

Example 1 Methyl methacrylic acid resin was applied as a release layer to polyester film #25, and printing was performed using ink containing nitrocellulose and pigment as a pattern layer, and then vinyl chloride-vinyl acetate copolymer was applied as a protective layer. After applying a combination, a photosensitive resin was partially printed and dried so as to have gaps corresponding to the contours of the pattern layer, and _A1 vapor deposition was applied to the entire surface.

After that, apply ultraviolet rays and develop with a weak alkaline developer (Na ₃ PO ₄ ) to remove only the desired areas.
A foil with A ₁ deposited layer was obtained.

As a next step, an adhesive layer made of ethyl methacrylic acid resin and polyester resin was applied to the entire surface of this foil as a heat-sensitive adhesive layer to obtain a transfer foil. The transfer foil has a printed pattern and an _A1 vapor deposited layer in desired areas,
Moreover, even the fine lines of the _A1 vapor deposited layer were clearly expressed, and the aesthetic effect was excellent.

250℃, 10cm/styrene plate as transfer target
After heat-pressing at a speed of sec, a polyester film was passed through to obtain a transfer product having a metallic luster partially along the outline of the pattern layer.

<Effects of the Invention> As described above, the method for producing a metal vapor-deposited transfer sheet of the present invention simultaneously applies an arbitrary pattern and a desired metal vapor-deposited layer matching the pattern onto a transfer target by one heat transfer. It was an excellent metal vapor deposition transfer sheet that not only reproduced complex patterns but also allowed products to be manufactured at low cost since it did not require the various processes required in the past.

In addition, since the metal vapor deposited layer in the transfer sheet of the present invention uses a photosensitive resin as a resist, a water-soluble resin layer is provided in areas where a conventional vapor deposited layer is not required, and the partial metal vapor deposited layer is removed by washing with water. Unlike conventional gravure printing, there is no difficulty in positioning the boundaries of the water-soluble resin layer, and there are no problems with the workability of washing and removing the layer, and even fine patterns and lines along the contours of the pattern layer can be clearly reproduced. It is also possible to express gradation by halftone dots on the plate.

Furthermore, there is no need to overlap the boundary portion between the pattern layer and the photosensitive resin layer, and unlike conventional water-soluble resins, there is no need to dissolve and remove unnecessary resin at the boundary portion.

[Brief explanation of drawings]

1 to 5 are schematic cross-sectional views showing the method of manufacturing a transfer sheet of the present invention in order of steps.
The figure is a schematic cross-sectional view showing a conventional manufacturing method. 1: Base material, 2: Peeling layer, 3: Design layer, 4: Protective layer, 5: Vapor deposition layer (metal), 6: Photosensitive resin layer,
7: Heat-sensitive adhesive layer, 8: Undercoat layer.

Claims (1)

[Claims] 1. A release layer that can be peeled off from the film base material is provided on one side of the film base material, and after providing an arbitrary pattern layer or a protective layer on the entire surface or part of the film base material by printing on the release layer, the outline of the pattern layer is formed. In accordance with this, a positive photosensitive resin layer having a diazo group or an azide group is provided on unnecessary parts of the metal vapor deposited layer, and then, after forming a metal vapor deposited layer on the entire surface, light is irradiated to solubilize the photosensitive resin. , a method for manufacturing a transfer sheet in which a heat-sensitive adhesive layer is formed on the entire surface after dissolving and removing a positive photosensitive resin together with a metal vapor deposited layer.