JPS6154999A - Transfer sheet and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transfer sheet and a method for manufacturing the same, and in particular, in order to facilitate the transfer of an image area of a dry transfer sheet, a release layer is provided on a base sheet. Instead, the colored layer is directly provided on the base sheet to improve the peelability of the colored layer.

BACKGROUND OF THE INVENTION Dry transfer sheets that can transfer images such as characters and designs to a transfer target such as paper are widely known. This dry transfer sheet presses characters, etc. formed on a base sheet such as a plastic sheet onto an object to be transferred via an adhesive layer provided thereon, thereby making the image area peelable from the base sheet. It is designed so that it can be transferred to a transcription material.

For such a print sheet, a release layer is formed on the base sheet4, and ink of the desired color is applied to this release layer.
The ink layer is dried to form an ink layer, and then a photosensitive liquid is applied to this ink layer and dried to form a photoresist Fi to produce a photosensitive film. To create a transfer sheet from this photosensitive film, for example, the photoresist layer is exposed to ultraviolet light through the original, and the exposed areas are left to harden or remain unhardened to create a negative or positive film.
Therefore, it is known that the uncured portions of these films are removed using a developer, and then an adhesive is applied to the cured portions. Further, an adhesive layer is formed on the ink layer,
A transfer sheet in which a photoresist layer is formed on the photoresist layer, an original is passed through this layer and exposed to light, and the non-image areas are removed using a developer, and the photoresist layer in the image area is removed to expose the adhesive layer. is also known.

However, in any of the above transfer sheets, a release layer is formed on the base sheet using a solution such as silicone, and an ink layer is formed on this release layer. It is unavoidable that uneven coating occurs, and during the transfer, the image area is not peeled off uniformly, and areas where peeling is relatively difficult to occur remain on the base sheet side.
Defects may occur in the transferred image. Another disadvantage is that traces of ink remain on the release layer, which is the non-image area, and are transferred onto the object during transfer.

There are also problems when creating multicolor printing transfer sheets. For example, after developing to form a one-color image area, a two-color front image area is further formed, and when forming a multicolor image area in the same manner, the non-image area is removed and the mold is released during development. The layer may also be removed, and when this happens, if a subsequent color image is formed in the same way, this image will contain parts that are directly adhered to the base sheet without a release layer. Since this portion has a strong adhesive force, it may not be transferred during transfer and may remain on the base sheet side. If this happens, defects 10 will also occur in the transferred material, which is not preferable.

Problems to be Solved by the Invention As mentioned above, the conventional transfer sheet has a problem in the releasability of the transferred image area due to the provision of a release layer between the base sheet ζ ink layers, and it is difficult to obtain a complete and clear image. However, it has been desired to improve this problem since it is sometimes difficult to obtain a transcript with a high quality.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an image area formed based on the exposure of a photosensitive material to be transferred to a transfer object, and an image area that is bonded to the transfer object. In the transfer sheet having at least an adhesive layer on the base sheet, the image portion is directly formed on the base sheet, and the image portion is characterized by M. The sheet manufacturing method is to apply a peel strength of 20g/2 on the base sheet.
A colored layer of 5 mm or less is provided, a photoresist layer is provided on this colored layer, the original is exposed to light, the non-image portion of this photoresist layer and the colored layer corresponding to this non-image portion are removed, and an adhesive is applied to the image portion. A method for producing a transfer sheet characterized by comprising the step of providing a layer, a photosensitive colored photoresist layer having a peel strength of 20 g/25 mm or less is provided on a base sheet, and this colored photoresist layer is exposed through an original, A method for producing a transfer sheet, comprising the step of removing the non-image area of the colored photoresist layer and providing an adhesive layer on the image area;
A colored layer with a peel strength of 2 h/25 mm or less is provided on the base sheet, an adhesive layer is provided on the colored layer, and a photoresist layer is provided on the adhesive layer, and the non-image portion is exposed through the original. The present invention also provides a method for manufacturing a transfer sheet, which comprises the steps of removing the adhesive layer and colored layer corresponding to the non-image area, and further removing Photoresis 1-5 from the image area.

Next, the present invention will be explained in detail.

The transfer sheet of the present invention has the above configuration and is manufactured by the method described above, but in the present invention, the peel strength of the colored layer or colored photoresist layer to the base sheet is 20 g/25 mm (20 g/25 mm width,
below), preferably 3g/25m
m or less. If this peel strength is greater than 20g/25mm, the colored layer or colored photoresist hi may not be completely peeled off from the base sheet when used as a transfer sheet, resulting in a complete and clear transferred image being formed on the transferred object. There are things I can't do.

In addition, if the adhesive strength of this colored layer or colored photoresist layer is too low, it may not be possible to hold the colored layer on the base sheet as a film, or each layer such as the subsequent photoresist layer 1 may not be attached to the base film. I can't hold these eyebrows, so I'm going to make sure I can hold them.

rt of such a colored layer or colored photoresist layer, +
To achieve + sat strength, it is necessary to consider the base sheet, colored layer, or colored photoresist N, but the base sheet can be made of glassine paper, polyethylene, polypropylene, polyester, vinyl polymer, polystyrene, or any of these. Similar to □, there are materials that have the properties of □. Note that the term sheet also includes what is called a film.

In addition, the colored layer is not only formed by coating with lacquer type pigment ink or dye ink, but also
Metal is deposited on top of the resin film and then included. Water-insoluble lacquer type inks are also used as pigment type inks.

The above-mentioned ink contains at least a resin component and a solvent as a binder, and often contains a coloring agent such as a pigment or dye that is normally used in printing inks. As described above, the ink forming the colored layer according to the present invention may contain a release agent in order to improve releasability from the base sheet. These mold release agents include, for example, silicone-based surfactants.

A photoresist layer may be provided on the colored layer;
A photoresist layer may be provided via an adhesive layer, and in addition to ordinary photographic emulsion, a photosensitive resin may also be used for this photoresist layer. When a photoresist layer is provided on a colored layer, it may be provided directly, but it may also be provided after coating the colored layer with fine powders such as magnesium silicate. forms a hydrophilic or oleophilic surface, allowing uniform application of a photosensitive liquid that can form a photoresist layer.

In the above example, photoresist H was provided as the colored layer, but a colored photoresist layer may be provided on the base sheet by mixing a photosensitizer with the colored layer, and these may include the above-mentioned colored photoresist layer. Materials can also be used.

In the present invention, after providing a photoresist layer on the colored layer, or after forming a colored photoresist layer, or after providing an adhesive layer on the colored layer, a single layer of photoresist 1 is provided, and then exposure is performed through an original, A exposed area and an unexposed area are formed, and the unexposed area is washed away, for example, with water. Then, the colored layer or colored photoresist (JW), adhesive layer, and ink layer corresponding to this washed-out area are removed by wiping the surface with, for example, a band saturated with a solvent. The colored layer has a photoresist layer formed thereon, or the colored photoresist layer has an adhesive layer thereon, and the colored photoresist layer has an adhesive layer formed thereon, and a photoresist layer has been formed on the adhesive layer. For example, this resist layer is removed with a photoresist removal liquid such as an alkaline liquid, and the adhesive layer is exposed in the residue.

When the transfer sheet formed in this way is pressed with the adhesive layer side against a non-transferable object such as paper and pressed from the back side, the image area of the ink layer is peeled off from the base film and transferred to the transferred object. .

Effects of the invention The peel strength of the colored layer or colored photoresist layer from the base sheet is set to 20 g/25 mm or less, and since no release layer is provided on the base sheet, uneven coating of ink used to form the colored layer or colored photoresist layer is reduced. Furthermore, even in the case of multicolor ink printing, the releasability of the ink film of each color is determined only by the properties of the ink itself, so that it is possible to eliminate transfer omissions during the transfer. As a result,
A complete and clear transferred image can be obtained. Also,■
Productivity can also be increased by omitting the step of providing a shaped layer.

Embodiments Next, embodiments of the present invention will be described with reference to FIGS. 1 to 8.

Example 1 Ink layer 2 is formed by coating a polystyrene base sheet 1 with ink of set tc shown in the table, and a photosensitive liquid shown in the table is applied on top of this ink layer to form photoresist layer 3. (Figure 1). Next, the original is exposed to light using a chemical lamp, and the exposed area is washed away with water to form an image area (FIG. 2).

Thereafter, the ink M2 corresponding to the unexposed area is wiped off with a pad saturated with a developer of the solvent shown in the table to form an image area consisting of the ink layer 2 and the photosensitive layer 3.
Figure 3). Then, a pressure-sensitive adhesive shown in the table is applied to the exposed photoresist layer 3 to form an adhesive layer 4,
Create a transfer sheet. When the adhesive layer of this transfer sheet was applied to an object to be transferred such as paper and pressed from the back side, the image area of the ink layer was completely and clearly transferred to the object to be transferred.

Peeling of the ink layer 3 of this transfer sheet and the base sheet 1
The elt strength was as shown in the table.

Example 2 An ink having the composition shown in the table is applied to a polyethylene base sheet 11 to form an ink layer 12, and an adhesive shown in the table is applied on top of this ink layer to form an adhesive layer 13. Then, a photosensitive liquid shown in the table is applied to this adhesive layer to form a photoresist layer 14 (FIG. 6). The photoresist layer 14 is then exposed through the original, the unexposed areas thereof are removed with water, and the adhesive and ink layers corresponding to the removed areas are then applied to a pad saturated with a developer of the solvent shown. Wipe it off as shown in Figure 7. Then, the exposed photoresist layer is removed with an alkaline photoresist removal solution to expose the adhesive layer 13 and form a transfer sheet. This transfer sheet also transferred the image portion well to the paper. The peel strength between the ink layer of this transfer sheet and the base sheet was measured, and the results are shown in the table.

Example 3 A transfer sheet of Example 3 was obtained in the same manner as in Example 1 except that a polyester film was used as the base sheet and the other materials shown in the table were used, and the peel strength between the ink layer and the base sheet was measured. , the results are shown in the table. The image area of this transfer sheet was also well transferred to the paper.

Example 4 The transfer sheet of Example 4 was obtained in the same manner as in Example 2 except that a polypropylene film was used as the base sheet and the other materials shown in the table were used, and the peel strength between the ink layer and the base film was measured. The results are shown in the table. The image area of this transfer sheet was also well transferred to the paper.

Example 5 A transfer sheet of Example 5 was obtained in the same manner as in Example 1 except that a polyvinyl chloride film was used for the base sheet and the ink and developer shown in the table were used, and the ink layer and base sheet were separated. The peel strength was measured and the results are shown in the table. The image area of this transfer sheet was also well transferred to the paper.

In addition, peeling 1iIl! The test was performed at a peel angle of 180 degrees and a tensile speed of 5.
It was run at 0 marks/min.

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[Brief explanation of the drawing]

Figures 1 to 4 are diagrams showing an outline of the manufacturing process of a transfer sheet according to one embodiment of the present invention, and Figures 5 to 8 are diagrams showing an outline of the manufacturing process of a transfer sheet according to other embodiments. be. In the figure, 1.11 is a pace sheet, 2.12 is an ink layer,
3.14 is a photoresist layer, and 4.13 is an adhesive layer. August 25, 1980

Claims (4)

[Claims] (1) In a transfer sheet having at least on a base sheet an image area to be transferred to an object to be transferred, which is formed based on the exposure of a photosensitive material, and an adhesive layer for adhering this image area to the object to be transferred, the above-mentioned image A transfer sheet characterized in that a portion is formed directly on the base sheet, and the peel strength of the image portion with respect to the base sheet is 20 g/25 mm or less. (2) A colored layer with a peel strength of 20 g/25 mm or less is provided on the base sheet, a photoresist layer is provided on this colored layer, and the original is exposed to light to correspond to the non-image area of this photoresist layer and this non-image area. 1. A method for manufacturing a transfer sheet, comprising the steps of removing a colored layer and providing an adhesive layer on an image portion or the entire surface. (3) A photosensitive colored photoresist layer with a peel strength of 20 g/25 mm or less is provided on the base sheet, and this colored photoresist layer is exposed through an original to remove the non-image area of this colored photoresist layer and image. A method for producing a transfer sheet, comprising the step of providing an adhesive layer on a portion. (4) A colored layer with a peel strength of 20 g/25 mm or less is provided on the base sheet, an adhesive layer is provided on this colored layer, a photoresist layer is provided on this adhesive layer, and the original is exposed to light to remove the A method for producing a transfer sheet, comprising the steps of removing the adhesive layer and colored layer corresponding to the image portion and the non-image portion, and further removing the photoresist layer of the image portion.