JPH0241143Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to adhesive copying paper, and in particular, adhesive copying paper made by laminating multiple pressure-sensitive coloring type copying papers coated with pressure-sensitive adhesive on the back side. Regarding copy paper.

[Prior Art] Conventionally, an electron-donating, colorless coloring agent is dissolved in a non-volatile oil, etc., and microcapsules are prepared using this coloring agent-containing oil as a core material, and the microcapsules are coated on the back side of a support. By placing paper and a lower paper, which is made by coating the surface of a support with an electron-accepting colorless developer, with the coated layers facing each other, and applying pen pressure from the top side of the upper paper. Pressure-sensitive copying paper that produces a colored image on the bottom paper, or, for example, JP-A-59-
As shown in Publication No. 14987, etc., an electron-donating colorless coloring agent and an electron-accepting colorless developer that reacts with this coloring agent to produce a colored product are mixed on the same side of the support. Pressure-sensitive copying paper is generally known in which a colored image is obtained on plain paper coated with a coloring agent and placed on the underside of a support.

[Problem that the invention attempts to solve]

This type of conventional pressure-sensitive copying paper does not use colored substances, unlike conventional carbon-backed paper, so it does not stain hands or clothes, and is often used for office paper and the like.

However, the former, which develops color by combining the upper paper and the lower paper, has a problem in that unprocessed plain paper cannot be used as the lower paper, and its uses are limited. In particular, when a barcode is printed on the bottom paper and read by a barcode reader, the developer coated on the surface of the bottom paper peels off and adheres to the barcode, causing reading errors. There is a risk.

On the other hand, with a self-coloring type that uses only a pressure-sensitive coloring layer applied to a support, a colored image can be obtained regardless of the type of paper, so plain paper, for example, can be used as the base paper, and It has the advantage that it can be applied to various cards that require a code reader.

However, when applying such self-coloring pressure-sensitive copying paper to, for example, a multi-leaf tag in the form of a copy, a peel-off film is applied to the back side of the top-side tag made of pressure-sensitive copying paper in the usual way. If paper is used, the pressure-sensitive color forming layer is covered with the release paper, making it impossible to obtain a transferred image on the lower label. In this case, after copying, it is necessary to apply glue to the back side of the top label made of pressure-sensitive copying paper and affix it to the product, making handling extremely complicated.

In addition, there are cases in which labels are pre-printed with a column for writing the delivery address, etc. or a bar code on the surface of the label, but when printing on pressure-sensitive copying paper, the pressure-sensitive color forming layer is created by the pressure during printing. There is also the problem that the color develops and the transfer function becomes insufficient, or that the color develop part is visible on the front side of the pressure-sensitive copying paper and is erroneously read when the bar code is read by a bar code reader.

In addition, when the material, thickness, etc. of a tag are specified depending on its purpose, pressure-sensitive copying paper that has been subjected to pressure-sensitive coloring processing on such special paper becomes expensive because its production volume is limited. There is also a problem.

The present invention was developed in response to this current situation, and it can be used not only for the lower paper on which the transferred image is obtained, but also for the
Plain paper or other materials can be used as is for the upper paper to which pen pressure is applied, and there is no risk of color development when printing or other processing is applied to the upper paper. An object of the present invention is to provide an adhesive copying paper in which a release paper to which a pressure-sensitive adhesive can be applied in advance is interposed between each paper.

The present invention consists of a sheet of paper that has a display section on the top side and is coated with a pressure-sensitive adhesive layer on the bottom side, and a release-treated layer on the top side that contacts the bottom side of the paper, and electron-donating on the bottom side. A predetermined number of sheets of release paper coated with a self-coloring layer containing an electron-accepting light-colored developer and an electron-accepting light-colored developer that reacts with the coloring agent to produce a colored product are alternately laminated. and, during lamination, the pressure-sensitive adhesive layer on the lower surface of the paper is in releasable contact with the release-treated layer on the upper surface of the release paper on the adjacent lower layer side, and the self-coloring layer on the lower surface of the release paper is in contact with this, and the self-coloring layer on the lower surface of the release paper is It is characterized in that the coloring product is transferred to the display part in contact with the display part on the upper surface of the paper on the lower layer side adjacent to the paper.

[Effect]

The release paper according to the present invention has a pressure-sensitive color forming layer on the back side, so this release paper is applied to the bottom surface of the release paper by the pressure of the writing from the upper paper that is adhered to the adhesive layer on the back side. A transferred image is obtained on the lower paper. Moreover, the pressure-sensitive adhesive can be applied to the back side of plain paper for both the upper and lower sheets, and there is no problem of color development during processing.

〔Example〕

The present invention will be explained below by taking a photocopy-type tag as an example.

FIGS. 1 and 2 show an example of this type of tag, which includes an upper tag 1 and a lower tag 2, both of which are made of plain paper without any surface treatment. On the front side of each of the tags 1 and 2, as shown for the top tag 1 in FIG. As shown in FIGS. 1 and 2, adhesive layers 5 and 6 are formed by applying a pressure-sensitive adhesive, and release papers 7 and 8 are attached to each adhesive layer 5 and 6, respectively.

The release paper 7 adhered to the adhesive layer 5 of the top tag 1 has a release surface 9 coated with silicone or the like in the same way as the release paper 8, as shown in FIG. 3a. In addition, on the back side of the release paper 7, as shown in FIG. 2 and FIG.
A pressure-sensitive coloring layer 10 is coated on the lower tag 2 to form a transferred image by pressure applied by pressure printing such as type printing.

This pressure-sensitive coloring layer 10 may be made of, for example, an electron-donating light-colored coloring agent described in JP-A-59-14987, etc., and an electron-accepting coloring agent that reacts with the coloring agent to produce a colored product. A mixture of a light color developer, waxes, and polyvinyl ether is used. In this specification, the term "light color" with respect to the color forming agent and color developer refers to a color that is clearly distinguishable from the colored portion, including the case of being colorless.

As the light coloring agent used in the pressure-sensitive coloring layer 10, known electron-donating compounds such as triarylmethane compounds such as 3,3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide can be used. Appropriate organic compounds can be selected from these organic compounds and used alone or in combination.

Further, as the light color developer used in the pressure-sensitive color forming layer 10, any one may be selected from inorganic acidic substances such as acid clay and zeolite, and other various known electron-accepting color developers. They can be used alone or in combination.

At least one of the color former and the color developer is microencapsulated by a known method such as a monomer polymerization method or a phase separation method. Furthermore, as the nonvolatile oil used for microencapsulation, alkylnaphthalene-based, aromatic ester-based, aliphatic ester-based oils, and the like are used.

In addition, when using the color developer in microcapsule form, an oil-soluble color developer such as a phenol type or a salicylic acid type is preferable.

Here, waxes and polyvinyl ether in the pressure-sensitive coloring layer are used to color the 10 sides of the pressure-sensitive coloring layer, and when pressure-sensitive printing is performed, the printing density on the 10th side of the pressure-sensitive coloring layer is the printing density on the lower tag 2. In particular, polyvinyl ether is used to obtain an effect as a bonding agent to the release paper 7 by utilizing its adhesive property, and also to obtain a release effect by utilizing its property as a softening agent. It is used to minimize color development in the pressure-sensitive color forming layer 10 when the paper is bent.

Waxes include various animal waxes,
Waxes such as vegetable waxes, mineral waxes, petroleum waxes, modified waxes, and amide waxes can be used alone or in combination.

As the polyvinyl ether, various polyvinyl alkyl ethers such as polyvinyl methyl ether can be used.

In the above configuration, when manufacturing the release paper 7, a release agent such as silicone is applied to the surface of the release paper base paper to form the release treated surface 9, and a color forming agent, a color developer, etc. A pressure-sensitive coloring layer 10 is formed by applying a coating liquid made by mixing waxes and polyvinyl ether.

The coating solution can be applied as a water-dispersed coating solution to the entire surface of the release paper using a coater such as an air knife coater, or after drying the microcapsules by spray drying etc., if necessary, it can be coated in the form of a fine powder. A method of uniformly mixing the coloring agent and color developer at the melting temperature of wax to form a coating solution, and printing this on a part of release paper using an ordinary carbon printer, etc., and further spraying microcapsules. Possible methods include drying, dispersing in an organic solvent to form an ink, and spot-printing this by flexographic printing.

In addition, when preparing the coating liquid, it is also possible to add a liquid property improver such as a thickener to keep the viscosity constant or a surfactant to improve dispersibility depending on the type of coater or printing machine. good.

Although paper is mainly used as the material for the release paper 7, plastic film, synthetic paper, metal foil, etc. may also be used.

By disposing the pressure-sensitive color forming layer 10 on the back side of the release paper 7, not only the lower label 2 but also the upper label 1 can be made of plain paper. Therefore, it is possible to fully meet a wide variety of demands regarding paper quality and the like. In addition, when various types of printing 3 and 4 are applied to the surfaces of the tags 1 and 2, the color development does not occur, especially on the top tag 1, and the colored portions are visible from the front surface side, making the appearance unsightly, or the barcode There is no possibility that the code 4 will be read by mistake when it is read by a barcode reader.

In addition, since the adhesive layer 5 can be placed on the back surface of the top tag 1 as well as the bottom tag 2, it is extremely easy to attach the adhesive layer to the product.

In the above-mentioned embodiment, if each of the tags 1 and 2 is made of plain paper, there may be problems with the tags getting wet due to rainwater and peeling off depending on the mode of use. In such cases, a solution of cellulose nitrate with a dry weight of 1.0
By applying it to the surfaces of both tags 1 and 2 at a rate of about 3 g/m ² to 5 g/m ² , preferably about 3 g/m ² , the voids between the cellulose fibers of the paper are filled and sufficient waterproofness is achieved. It is possible to obtain tags 1 and 2 having the following values. In addition, with normal waterproofing, the writing and copying properties of the paper are significantly impaired, but with this method, the writing properties and pressure-sensitive color forming layer 10 are equivalent to that of plain paper.
transferability can be obtained.

Furthermore, although the above embodiments have been described using a luggage tag as an example, the present invention can be similarly applied to other types of copying paper such as various types of ledgers.

[Effect of idea]

As explained above, the present invention includes an electron-donating, light-colored color former and an electron-accepting, light-colored developer that reacts with the color former to produce a colored product. Since the pressure-sensitive color forming layer, which allows a transferred image to be obtained on the disposed lower paper, is disposed on the back side of the release paper, a clear transferred image can be obtained even if the lower paper is plain paper. Also, the upper paper can be made of plain paper or any other material, unlike when pressure-sensitive copying paper is used as the upper paper.
There is no risk that the transfer function will be impaired due to color development when barcodes and the like are printed on the surface of the paper, or that the barcodes will be read incorrectly by a reader. Furthermore, since a pressure-sensitive adhesive can be applied to the back surface of the upper paper in advance, pasting work after copying is extremely easy.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an enlarged cross-sectional view of FIG. 1, FIG. 3a is an explanatory view showing the front surface of the release paper for the top label, and FIG. 3b is an explanatory view showing the back surface of the release paper. 1... Top label, 2... Bottom label, 3... Entry field, 4... Barcode, 5, 6... Adhesive layer, 7,
8...Release paper, 10...Pressure-sensitive coloring layer.

Claims (1)

[Claims for Utility Model Registration] A sheet of paper that has a display section on the top side and is coated with a pressure-sensitive adhesive layer on the bottom side, and a release-treated layer on the top side that is in contact with the bottom side of the paper, and a bottom side that is coated with a pressure-sensitive adhesive layer. A predetermined number of sheets of release paper each coated with a self-coloring layer containing an electron-donating, light-colored color former and an electron-accepting, light-colored developer that reacts with the color former to produce a colored product. during lamination, the pressure-sensitive adhesive layer on the lower surface of the paper is in releasable contact with the release-treated layer on the upper surface of the release paper on the adjacent lower layer side, and the self-adhesive layer on the lower surface of the release paper is An adhesive copying paper characterized in that a coloring layer contacts an indicator on the upper surface of the paper on an adjacent lower layer side so that a coloring product is transferred to the indicator.