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Thermal transfer recording medium and method for preparing the same

A recording medium, thermal transfer technology, applied in the direction of temperature recording method, copy/marking method, chemical instrument and method, etc., can solve problems such as unresearched, ink curing, and inability to coat, and achieve solvent resistance without deterioration. , The effect of improving transferability and oil resistance

Inactive Publication Date: 2000-06-14
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, there is a fatal shortcoming in the curing agent used here
It is a so-called aluminum chelate such as (ethyl acetoacetate) aluminum diisopropionate, and such a chelate is also easily reacted by moisture in the air or in the solvent used to form the ink layer. , Therefore, for the above-mentioned thermal transfer recording medium, if a long-sized coating ink layer is to be continuously formed, it will not be coated due to ink curing.
[0014] On the other hand, when focusing on the type of oil, etc., thermal transfer recording media with sufficient solvent resistance for highly hygroscopic and non-volatile oils such as brake oil, not only the above-mentioned thermal transfer recording media, but also other conventional It has not been researched in the technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (Preparation of heat-resistant slip layer composition)

[0059] As a solvent, 98 parts by weight of M.E.K. (methyl ethyl ketone) were used to dissolve the following materials to prepare the target heat-resistant slippery layer composition.

[0060] Acrylic modified silicone resin (Semitec 308, manufactured by Toagosei Co., Ltd.) 1.3 parts by weight

[0061] Diisocyanate addition compound (D110, manufactured by Takeda Pharmaceutical Co., Ltd.) 0.7 parts by weight

[0062] (Preparation of composition for forming peeling layer)

[0063] As the solvent, 90 parts by weight of heated toluene was used to dissolve the following materials to prepare the target release layer forming composition.

[0064] 9 parts by weight of ester wax (OP wax, manufactured by Bestor)

[0065] Ethylene-vinyl acetate copolymer (KA-31, manufactured by Sumitomo Chemical Co., Ltd.) 1 part by weight

[0066] Among them, the melting point of the composition for forming such a release layer is about 95°C.

...

Embodiment 2～ Embodiment 6

[0095] In Examples 2 to 6, the thermal transfer recording medium was prepared by the same method as in Example 1, except that the weight part of the isocyanate compound used in Example 1 was changed. The thermal transfer recording medium was evaluated by the above method. The results are shown in Table 1.

[0096] (result)

[0097] It can be seen from Table 1 that the thermal transfer recording media of Examples 2 to 6 have good printing quality and brake oil resistance.

[0098] In particular, the thermal transfer recording media of Example 3 and Example 4 in which the isocyanate compound is added in the range of 10 to 20 parts by weight relative to 100 parts by weight of vinyl chloride resin have good printing quality and brake oil resistance. It turned out to be the best solution of the present invention.

Embodiment 7、 Embodiment 8

[0100] For Example 7 and Example 8, except that the vinyl chloride resin in Example 4 was replaced with polyester resin or polyurethane resin (the amount of carbon black was slightly larger), the thermal transfer was prepared in the same manner as in Example 4 Recording medium. These thermal transfer recording media were evaluated by the methods described above. The results are shown in Table 1.

[0101] (result)

[0102] It can be seen from Table 1 that although the thermal transfer recording media of Examples 7 to 8 are slightly inferior in brake oil resistance, the printing quality is good, and it is a recording sheet with no practical problems.

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PUM

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Abstract

The present invention provides a thermal transfer recording medium, which can transfer images to any type of substrates to generate prints with sufficient oil resistance even when they are used immediately after print operation. The thermal transfer recording medium of the present invention comprises a release layer and an ink layer in that order formed on a substrate, wherein said ink layer contains at least a colorant (A), a curing agent (B) and a bonding resin (C). Said ink layer is cured on said substrate by heating, for example. Said ink layer contains an isocyanate compound (b) and a vinyl chloride resin (c) capable of reacting with said isocyanate compound.

Description

Invention field [0001] The invention relates to a thermal transfer recording medium, in particular to a thermal transfer recording medium with excellent printing quality and oil resistance. Background of the invention [0002] In recent years, bar code images have become indispensable in distribution and cost management, such as in the food and grocery fields. For preparing such a barcode image, the most well-known method is the thermal recording method using a thermal transfer recording medium. [0003] The thermal transfer recording medium is mainly composed of a polyester film with an ink layer structure mainly formed of wax with a relatively low melting point and softening point. For such thermal transfer recording media, the use of thermal heads installed in the printer Heat, the above-mentioned ink layer can be transferred on labels, paper, labels and other sheets. [0004] In the past, there was a requirement to use the record sheet printed with a bar code image for the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/395B32B27/00B41M5/30B41M5/382B41M5/392B41M5/40B41M5/41B41M5/42
CPCB41M5/392Y10S428/913B41M5/38214Y10S428/914B41M5/42B41M5/395Y10T428/31855B41M5/382B41M5/035
Inventor 杉田纯一郎高桥秀明
Owner DEXERIALS CORP