JPH03219246A - Opaque material - 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] "Object of the Invention" (Industrial Application Field) The present invention is an opaque material that provides a light-shielding layer that has excellent scratch resistance and is resistant to scratches. Distinguish between non-image areas such as noise such as holes and original image areas, and direct all or part of the image area other than one image area, or unnecessary areas (non-image areas) to a light-shielding means, and apply a light-shielding layer using a heat-sensitive transfer layer. The present invention relates to an opaque material for providing.

(Prior art) In plate making work, work to block unnecessary light transmission or reflection parts (defective parts) caused by the glue being used, dirt on the base plate, dirt on the exposure device, etc. The light blocking method (opaque method) for plate-making film or photographic paper, etc., is the work of dividing drawing lines by color.
Methods of using mask sheets and methods of applying correction fluid are known.

In conventional plate-making films, photographic paper, and the like, means for blocking unnecessary light-transmitting or reflecting portions must be done manually by an operator.

Furthermore, when it comes to detecting unnecessary portions of plate-making film or photographic paper, there are problems such as detection is required by two human eyes, takes an hour, and requires training by one operator. Unnecessary parts are generally pinholes, lines, etc. Currently, these unnecessary parts are not only large in number, but also require a great deal of effort to detect.

In addition, to detect unnecessary light-transmitting or reflective areas in plate-making film or photographic paper, a standard sample is required because there is no inspection sample; There was a desire for a device that would shield unnecessary areas from light without causing any damage.

JP-A-62-275265, JP-A-633255
A device that attempts to automate the opaque work as in Publication No. 2 is also being considered, but it requires an inspection sample. Or it is an improvement on the conventional correction fluid application work. It is not necessarily an automated or simplified device.

Previously, a method capable of automating opaque work has been disclosed in Japanese Patent Application Laid-Open No. 63-238567. This method uses a thermal transfer material or the like.

A thermal transfer material is used to print or form an image on paper or the like using a thermal printer. The transfer layer of the heat-sensitive transfer material is a heat-fusible layer containing wax, pigment, etc. so that it can be easily transferred to paper or the like by thermal heating. Therefore, since the composition has a low hardness, the scratch resistance is low depending on the application, and the transfer layer of printed matter or image formation is easily scratched.

In order to improve the scratch resistance, attempts have been made to use a transfer layer that is hardened by heat, ultraviolet light, etc., or by a chemical reaction. However, these curable transfer layers have excellent scratch resistance, but tend to be inferior in terms of rubbing or rubbing off. Particularly in the case of film for plate making, unlike in the case of 2 sheets of paper, there is no seepage, so it is easy to fall off.

Contact between films 1. If the light-shielding layer is removed due to contact with human fingernails or pens, the purpose of light-shielding cannot be achieved.

"Structure of the Invention" (Means for Solving the Problems) The present invention provides an opaque material that can be printed by a thermal head, which is formed by providing at least one transfer layer on a base material. is the softening point so-ts
It is an opaque material containing 30% or more of thermoplastic resin at 0°C and having a pencil hardness of 2B or more, and the thermoplastic resin is polyamide polyester, styrene-acrylic copolymer, acrylic resin. , opaque materials such as rosin resins. It also has a base material, a release layer, and an ink layer.

The ink layer contains 30% by weight or more of a thermoplastic resin,
and has an opaque material or base material, a release layer, an ink layer and a top coat layer having a pencil hardness of 2B or more,
The present invention relates to an opaque material in which the top coat layer contains 30% by weight or more of a thermoplastic resin and has a pencil hardness of 2B or more.

That is, the present invention relates to an opaque material that detects an image portion or a non-image portion of a plate-making film or photographic paper on which a Wi image is formed, and forms a light-shielding layer on the non-image portion or the non-image portion using a thermal printer.

The opaque material of the present invention is a heat-sensitive transfer material having one or more transfer layers, and one of the transfer layers has a softening point of 50 to
It contains 30% by weight or more of a thermoplastic resin having a temperature of 150°C, and has a pencil hardness of 2B or more. In other words.

This is a thermal transfer material having at least one transfer layer made of a thermoplastic resin having a pencil hardness of 2B or more.

This transfer layer is an ink layer, a top coat layer, or the like. The layer may or may not contain a light shielding agent, which is a coloring agent.

Examples of the thermoplastic resin in the transfer layer containing 30% by weight or more of a thermoplastic resin with a softening point of 50 to 150°C and a pencil hardness of 2B or more include polyamide, polyester, styrene-acrylic copolymer, acrylic resin, and rosin. Selected from various resins. This transfer layer contains 30% of the thermoplastic resin.
Contains 0% by weight or more, and 0 to 40% wax in addition.
% by weight, dye or pigment O~50% by weight, additive O~2
Contains 0% by weight.

If the thermoplastic resin is less than 30% by weight, the pencil hardness is 2.
It is difficult to form a light shield that is B or higher and does not rub off.

The release layer is a layer for protecting the transfer layer containing the light-shielding material and for peeling it off from the base material during transfer, and its composition is 1, for example, 50-95% by weight of wax, 5-5% by weight of thermoplastic resin.
30% by weight, and 0 to 20% by weight of additives.

The top coat layer is a layer for adhesion to the object to be transferred, and its composition is 1, for example, 50 to 95% wax.

The thermoplastic resin content is 5 to 30% by weight, and the additive content is 0 to 20% by weight.

The bake material of the present invention can be produced by a hot melt coating method, a gravure coating method, or the like.

Example 1 10 parts of dye (Zapon, manufactured by BASF, West Germany), 1 part of polyester (Vylon 300, manufactured by Toyobo Co., Ltd., softening point 123°C)
, 7 parts of Karnahawasox, 35 parts of toluene, and 38 parts of methyl ethyl ketone were kneaded and dispersed in a ball mill to obtain an ink for a transfer layer.

This ink was applied to a 6 .mu.m thick polyester film using a wire bar to a thickness of 3 .mu.m and dried to obtain an opaque material (2). The pencil hardness of the transfer layer was B.

For comparison, 10 parts of dye (Zapon), ethylene-vinyl acetate resin (Tultracene 634° softening point 1 manufactured by Toyo Soda)
59°C) 15 parts, carnauba wax 7 parts.

An ink for a transfer layer was obtained by kneading and dispersing 35 parts of toluene and 38 parts of methyl ethyl ketone in a ball mill.

This ink was applied to a 6 μm thick polyester film using a wire bar to a thickness of 3 μm, and dried to obtain an opaque material 1-1. The pencil hardness of the transfer layer is 6B.
It was below.

The obtained opaque materials I and I-1 were installed in Opaque Mate (an automatic opaque device specially manufactured by Toyo Ink),
Each was thermally transferred to a plate-making film to form a light-shielding layer.

The light-shielding layer formed of Opaque Material I was hardly scratched by scratching with fingernails. However, the light shielding layer formed of opaque material I-1 was scratched by a fingernail.

Example 2 10 parts of dye (Zapon), 15 parts of polyamide (Reomite manufactured by Kao ■, softening point 109°C), 5 parts of carnauba wax,
Transfer layer ink a was obtained by dispersing 35 parts of toluene and 35 parts of methyl ethyl ketone in two cross lines using a ball mill.

10 parts carnauba wax, 5 parts rice wax.

5 parts of ethylene-vinyl acetate resin (Ultracene 710, manufactured by Toyo Soda, softening point: 125°C), 40 parts of toluene, and 40 parts of methyl isobutyl ketone were dispersed in a ball mill to obtain ink B for a transfer release layer.

Ink B was applied to a 6 μm thick polyester film using a wire bar to a thickness of 1 μm.

After drying, ink A was first applied to a thickness of 3 μm and dried to obtain an opaque material (2) having a total transfer layer of 4 μm. The pencil hardness of the transfer layer using ink a is B.
Met.

For comparison, transfer layer ink C was prepared by kneading and dispersing 10 parts of dye (Zapone), 15 parts of ethylene-vinyl acetate resin (Ultracene 634), 5 parts of carnauba wax, 35 parts of toluene, and 35 parts of methyl ethyl ketone in a ball mill. Obtained.

Ink B was applied to a 6 μm thick polyester film using a wire bar to a thickness of 1 μm.

After drying, Ink C was applied to a thickness of 3 .mu.m and dried to obtain an opaque material 1-1 having a total of 9 transfer layers of 4 .mu.m. Note that the pencil hardness of the transfer layer using Ink C was 6B or less.

When opaque was made in the same manner as in Example 1, the light-shielding layer made of opaque material (1) was not scratched by fingernails, but the light-shielding layer made of opaque material (1) was scratched.

Claims (1)

[Scope of Claims] 1. An opaque material that can be printed by a thermal head and has at least one transfer layer on a base material, wherein at least one of the transfer layers is a thermoplastic resin with a softening point of 50 to 150°C. Contains 30% by weight or more, and has a pencil hardness of 2.
An opaque material characterized by having a hardness of B or higher. 2. The opaque material according to claim 1, comprising a base material, a release layer, and an ink layer, the ink layer containing 30% by weight or more of a thermoplastic resin, and having a pencil hardness of 2B or more. 3. Claim 1, comprising a base material, a release layer, an ink layer, and a top coat layer, wherein the top coat layer contains a thermoplastic resin in an amount of 30% by weight or more and has a pencil hardness of 2B or more. opaque material.