JPH02150391A - Thermal transfer recording medium - Google Patents

Abstract

PURPOSE:To prevent stains by rubbing of an ink layer by a method wherein a separating layer and a protective layer for raising transfer performance is established between a base material and a thermal fusible ink layer. CONSTITUTION:A separating layer is composed of a material to be melted at 50 to 120 deg.C and has wax independently and/or both the wax and resin as main components. A protective layer is composed of base resin and a viscosity reducing agent in being melted. The base resin is selected among acrylic resin, cellulosic resin, epoxy resin, and ketone resin. As the viscosity reducing agent, rosin, modified rosin and their derivatives, alkylphenol resin, etc., are exemplified. When the base resin and the viscosity reducing agent are used by a rate of 10 to 100wt% : 0 to 90wt%, a best result can be obtained. When printing is performed, the protective layer covers thoroughly an ink layer, and the ink layer becomes very strong against stains caused by rubbing.

Description

DETAILED DESCRIPTION OF THE INVENTION □=L side"U regular 1f The present invention provides a thermal transfer recording medium, particularly a thermal transfer recording medium that is effective in preventing the transferred ink layer from being scratched and smudged.

The heat-sensitive transfer recording medium referred to in item 2 includes not only those used in word processors but also stamping foils.

[L ui Heat-melting properties of thermal transfer recording media in which a heat-melting ink layer is provided on a base material made of a film made of polyester resin or polyimide resin, or thin paper such as glassine paper, tracing paper, or condenser paper. Lay Nishitsu paper, tag or one part of electric wire (vinyl covering) on the side of the ink layer and heat it with a thermal head from the curved substrate side to melt the heat-fusible ink layer and pass the M paper and tag. A thermal transfer recording method is known in which images are transferred onto electric wires (vinyl-covered portions).

However, plain paper, tags, and electric wires (vinyl-coated parts) that have been coated with a heat-melt ink layer using this method are easily stained by rubbing the heat-melt ink layer. There was a drawback.

Therefore, the object of the present invention is to provide a heat-sensitive transfer recording medium that is capable of (i) preventing the heat-melting ink layer transferred onto plain paper, tags, and electric wires (vinyl-covered portions) from being scratched; -It's about that.

The present invention provides a heat-sensitive transfer recording medium in which a heat-melting ink layer is provided on a base material (2). Cough J, characterized in that a peeling layer for removing the rolling properties and a protective layer for protecting the transferred heat-fusible ink layer are provided between the material and the heat-fusible ink layer. shall be.

As a base material, films made from the aforementioned polynisder resin or polyimide resin, glassine paper, [・
You can use thin paper such as racing paper or gondunosaur paper.

The release layer is made of a material that melts at a temperature of 50 to 120°C, and usually contains wax as a medium and/or a combination of this and resin as a main component, and may also contain other fillers. You can also do that.

Good results can be obtained by using waxes that melt at 50 to 120°C, such as carnauba, montan, candelilla, paraffin, rice wax, and polyethylene wax.

Good results can be obtained by using ethylene-vinyl acetate copolymer, acrylic resin, ethylene-acrylic copolymer, polyvinyl acetate, ethyl cellulose, polyvinyl butyral, rosin, polynisdel, etc. as the resin component.

As a filler, calcium carbonate, barium sulfate, I%
A fine powder such as aluminum aluminum chloride I can be used.

The protective layer preferably consists of a base resin or a base resin and a viscosity reducing agent when melted.

The base resin for the protective layer is acrylic resin.

At least one type of J- may be selected from cellulose resins, epoxy resins, and ketone resins.

As the viscosity reducing agent during melting of the protective layer, rosin, modified rosin and derivatives thereof, alkyl/phenol resin, alkyl/phenol-modified xylene resin, Derben resin, terpene phenol resin, rosin-modified phenol resin, hydrocarbon resin, α -Methylstyrene-vinyltoluene copolymer, low-fraction 'f-clear styrene resin, coumaron-indene resin, rosin-modified maleic acid resin and styrene 7
All you have to do is choose at least one god from among the leic acid resins.

The base resin of the protective layer and the viscosity reducing agent when melted are 10 to 1
The best results can be obtained when the stem is used in a ratio of 0 to 90% by weight: 0% by weight.

In addition, the above-mentioned fillers and the like can also be used in combination within a range that does not impair the film properties of the resin.

Next, the heat-melting ink layer contains a generally known colorant containing pigments such as carbon black and graphite;
Consists of waxes such as carnauba and microcrystalline wax, and heat-resistant resins such as polypropylene, ethyl-1-vinyl acetate copolymer, acrylic resin, saturated polynisder resin, and ionomer resin. Oil resistant, alcohol resistant. When considering acid resistance, etc., it is advantageous to use acrylic resin, saturated polyester resin, or ionomer resin.In particular, better results can be obtained if one with a glass transition temperature of 120 to 70°C is used. It is necessary to use at least 30 L[I'it% of the resin in the hot-melt ink layer.30, f[i
If it is less than 1%, the abrasion resistance will be poor, and the oil resistance, alcohol resistance, acid resistance, etc. will also be poor. Particularly good results are obtained if more than 35 + fl f, f percent is used.

Additionally, fillers made of fine powders such as calcium carbonate, barium sulfate, aluminum oxide, and silica, and additives such as lubricating oil can be added.

The thermal transfer recording medium of the present invention coats one side of the base material with silicone resin or a surfactant, if necessary, to prevent stickiness caused by melting of the base material due to the heat of the surf head.
1- Provide a layer for the purpose of applying wax alone or in combination with resin as a substitute for the base material.
The coating material as an ingredient is applied using the Zurgento coating method, or
After forming a release layer by applying emulsion (using a commonly used coating method such as the no-coating method (the preferred thickness is 1 to 4μ)), a protective layer (preferably It can be easily manufactured by sequentially forming a J thickness of 0.2 to 1 μm) and a heat-melting ink layer (suitable thickness of 1 to 5 μm).

Thickness 5 with a heat-resistant treatment layer on one side to prevent scratches.
A coating agent made of carnauba wax was applied to the other side of the μ polyester film to a J'J width of 1 μ.

The above-mentioned coating agent was applied onto the above-mentioned release layer to a thickness of 1 μm.

Acrylic resin (40% solution) 15 parts Lysinated maleic acid 6 parts Isopropyl alcohol 84 parts 60 parts Carbon black aqueous dispersion (30% solution) 40 parts 1. Mix with a stirrer to prepare a coating material. . This material was coated on the top of the protective layer to a thickness of 2.5 μm.

When printing was performed using this thermal transfer recording medium, good printing was obtained.

Print a barcode using this thermal transfer recording medium and
IS standard fi (LO823) friction tester! Instead of using self-cotton cloth for the friction element of the mold, use "Radar 3" manufactured by Seed Rubber Industries Co., Ltd.
When a test was conducted by pasting "50", no change was observed in the mark R even after 50 reciprocating tests].

Next, when the test pieces were immersed in water at 35°C for 4 hours and irradiated with ultraviolet rays at 70°C for 100 hours in the same manner as above, no scratches were found.

Also, after soaking it in engine oil, I did the same test as above, but no scratches or stains were visible. A similar test was conducted with gasoline and found similar effects.

Next, sandwich the print between cloth and iron (150℃)
) and conducted a heat resistance test, no change was observed in the printing.

In addition, we used this product to print on a vinyl chloride sheet, and even if it was scratched with the tip of a finger or with a sharp metal tip, the print firmly adhered to the vinyl chloride sheet, protecting it and preventing stains. Printing with extremely good scratch resistance was obtained.

Leather test 1 When I printed on a vinyl chloride sheet using the same method as in Example 1 without the protective layer, I found that when I rubbed it with my fingertip, it immediately turned off.
I got Tj.

Effect: When printing on plain paper, rugs, labels, stickers, electric wires, etc. using the thermal transfer recording medium of the present invention, the protective layer completely covers the ink layer, making it extremely resistant to scratches and stains. I became stronger. At the same time, it has excellent heat resistance and solvent resistance, and can be used not only for front-running paper, paper tags, labels, and stickers, but also for electric wires as well as textile tags, labels, etc.
You can now even use stickers.

Claims (1)

[Claims] 1. A material in which the release layer melts at 50 to 120°C in a thermal transfer recording medium in which a release layer, a protective layer, and a heat-melting ink layer are sequentially laminated on a heat-resistant base material. A thermal transfer recording medium characterized by comprising: 2. The thermal transfer recording medium according to claim 1, wherein the protective layer comprises a base resin alone or a base resin and a viscosity reducing agent when melted. 3. The thermal transfer recording medium according to claim 2, wherein the base resin of the protective layer is at least one selected from acrylic resin, cellulose resin, epoxy resin, and ketone resin. 4. The viscosity reducing agent during melting of the protective layer is rosin, modified rosin and derivatives thereof, alkyl phenol resin,
Alkyl/phenol modified xylene resin, terpene resin, terpene phenol resin, rosin modified phenol resin, hydrocarbon resin, α-methylstyrene-vinyltoluene copolymer, low molecular weight styrene resin, coumaron-indene resin, rosin modified maleic acid resin, The thermal transfer recording medium according to claim 2, wherein the thermal transfer recording medium is at least one selected from styrene maleic acid resin. 5. The ratio of the base resin of the protective layer to the viscosity reducing agent when melted is 10 to 100% by weight: 0 to 90% by weight.
The thermal transfer recording medium described above.