JPS59148697A - Thermal transfer recording material - Google Patents

Abstract

PURPOSE:To obtain a thermal transfer recording material resistant to sticking phenomenon and head abrasion during the thermal transfer recording period by providing a thermal transferrable color ink layer on the upside of a thin sheet supporter having a wax or liquid substance layer on its downside. CONSTITUTION:In a thermal transfer recording material in which a thermal transferrable color ink layer is provided on the upside of a thin sheet supporter, a wax and/or liquid (at ordinary temperature) or paste substance is coated or impregnated into the downside of the supporter. The liquid or paste substance used includes vegetable oils, mineral oils, and synthetic oils. As the thin sheet supporter used, a thin sheet of condenser paper, perchiment paper, etc., and a film of polyester, polyethylene, cellophane, etc., may be cited. The wax used includes ones except for ones having offensive odors, and for example, animal waxes such as beeswax, spermaceti, etc., vegetable waxes such as carnauba wax, Japan wax, etc., and petroleum waxes such as paraffin wax, micro crystalline wax, etc., may be cited.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal transfer recording material used in a thermal recording device such as a thermal printer. More specifically, the present invention relates to a thermal transfer recording material that prevents stick phenomenon and head wear during thermal transfer recording.

Recently, thermal printers, thermal facsimiles, etc.
A thermal transfer recording material is used, which is a thin sheet support coated with a thermally transferable colored ink, and a clear and durable image is obtained on plain paper. The principle of thermal transfer recording is as follows. That is, a sheet of plain paper is placed on the thermally transferable colored ink surface of the thermal transfer recording material, and a thermal head selectively heats the ink in accordance with an electrical signal from the side of the thin support that is not coated with the ink. Transfer onto paper.・Recording is completed when the thermal transfer recording material and plain paper are peeled off.

However, when a plastic film with a melting point of 200°C or less, such as polystyrene, polyethylene, polypropylene, vinyl chloride, vinylidene chloride, etc., is used as the thin support, the thermal head becomes higher than the melting point of the plastic film. The plastic film melts and adheres to the thermal head, and also solidifies when the thermal head cools.

This state is called a stick phenomenon, and it becomes impossible for the thermal transfer recording material to run.

Furthermore, when a plastic film having a melting point of around 250° C., such as polyester or polycarbonate, is used as the thin support, the vestic phenomenon is alleviated compared to the plastic film having a low melting point. However, in high-speed recording in which the current is applied for a short period of time, the applied load is high, so even such a plastic film causes a sticking phenomenon, impairing the recording quality, and in severe cases, it becomes impossible for the thermal transfer recording material to run.

Further, if a heat-resistant plastic film such as polyimide or polyamide is used as the thin support, the stick phenomenon will not occur, but it is expensive and impractical.

Further, if a thin paper such as capacitor paper is used as the thin paper support, the stick phenomenon does not occur, but it has the disadvantage that wrinkles tend to occur due to moisture, and in the case of a serial head, the head is easily worn out.

In addition, as the thin leaf-like support, one in which a stick prevention layer is provided on a plastic film has been proposed, and various publications can be found.

For example, Japanese Patent Application Laid-Open No. 55-7467 proposes a stick prevention layer provided on a plastic film, and various publications can be found therein.

For example, in JP-A-55-7467, a heat-resistant protective film selected from the group consisting of silicone resin, epoxy resin, melamine resin, phenol resin, fluororesin, polyimide resin, and nitrocellulose is provided on one side of a plastic film. There is something.

Japanese Patent Publication No. 56-155794 discloses a plastic film in which an anti-stick layer comprising a highly slippery inorganic pigment and a thermosetting, highly softening, or high softening point resin material is provided on one side of a plastic film.

Japanese Patent Publication No. 57-74195 discloses a plastic film in which an anti-stick layer selected from a silicon oxide layer or a three-dimensional crosslinked layer of polyfunctional (meth)acrylates is provided on one side of the plastic film.

However, the stick prevention device shown in the example has disadvantages of high hardness, high wear, and short head life because it is processed with resin. or,
It easily generates static electricity due to friction, and when processed into a narrow tape, it has the disadvantage of extremely poor no-undling.

In order to solve these drawbacks, the present inventors conducted intensive research and found that in a thermal transfer recording material having a thermally transferable colored ink layer on the upper surface of a thin support, wax and/or If a thermal transfer recording material coated or impregnated with a liquid or paste substance at room temperature is used, the stick phenomenon will not occur.
The present invention was completed based on the new findings that head wear is significantly reduced and static electricity is less likely to occur.

The present invention will be explained in detail below.

As the thin leaf-like support of the present invention, conventionally known supports can be used as they are, and there are no particular limitations. For example, film-like materials include polyester, polystyrene, polyethylene, vopropylene, vinyl chloride, vinylidene chloride, polyimide, nylon, acetate, polycarbonate, cellophane, thin paper-like materials such as capacitor paper, training vapor, glassine paper, and parchment paper. etc.

The wax used in the present invention to be coated or impregnated on the lower surface of the thin support is not particularly limited, except for waxes that have a bad odor. Examples are beeswax, whale wax, Chinese wax,
Animal wax such as wool wax, candelilla wax,
Vegetable waxes such as carnauba wax, wood wax, oliculie wax, sugarcane wax, montan wax,
Mineral waxes such as osichelite, ceresin, and lignite wax, petroleum waxes such as paraffin sox and microcrystalline wax, Fischer-Tropsch wax and derivatives, synthetic hydrocarbons such as low molecular weight polyethylene and derivatives, montan wax derivatives, and rose fillet wax. Conductors, Microta I) Modified waxes such as metalin wax derivatives, synthetic aliphatic alcohols and acids such as cetyl alcohol and stearic acid, synthetic fatty acid esters of glyceryl stearate and polyethylene glycol stearate tubes, chrycerite, castor wax, opal wax, etc. hydrogenated wax, theme wax, hydrogenated wax such as Acra wax, armor
There are waxes, synthetic ketones such as acra wax, amines, amides, and other alpha olefin waxes.

Vegetable oils, fats and oils, mineral oils, silicone oils, polyethylene glycols, polypropylene glycols and the like can be used as the liquid or paste-like substance at room temperature that is applied or impregnated onto the lower surface of the thin support. Examples of plant-based oils include linseed oil, kaya oil, saffron oil, soybean oil, linseed oil, sesame oil, corn oil, rapeseed oil, bran oil, cottonseed oil, olive oil, sasanquat oil, perilla oil, castor oil, and peanut oil. , palm oil, coconut oil, etc. Examples of fats and oils include beef tallow, pork tallow, horse tallow, mutton tallow, and cacao fat. Examples of mineral oils include machine oil, insulating oil, turbine oil, motor oil, gear oil, cutting oil, and liquid paraffin.

As the heat-transferable colored ink layer of the present invention, a conventionally known heat-melting colored ink layer can be used as it is, and is not particularly limited. The thermally transferable colored ink layer used in the present invention is composed of colorants, waxes, resins, oils, and the like.

As the colorant, for example, in the case of black, carbon black, oil black, etc. can be used.

Examples of waxes include rose fillet wax, carnauba wax, microclimate wax, tintare wax, low molecular weight polyethylene wax, wood wax,
Beeswax, rice wax, etc. are used.

Examples of resins include ethylene copolymers, rosin derivatives,
Petroleum resin, styrene resin, etc. are used.

As the oil, mineral oil, vegetable oil, etc. are used.

Example 1 47 coats of heat-transferable colored ink were applied to a 9 JtA polyethylene terephthalate film using a hot melt coater Comparative Example 47 coats of heat-transferable colored ink were applied to a 9 JtA polyethylene terephthalate film using a hot melt coater to create a thermal transfer recording material. did.

In order to confirm the stick resistance of the thermal transfer recording materials obtained in Example 1 and Comparative Example 1, Thermal Fa ITl (manufactured by Matsushita Electronic Components) was used. In Comparative Example 1, no sticking occurred, but in Comparative Example 1, stick was raw and a frost image was formed due to the KM adhesion on the polyethylene terephthalate film surface. Also, the stick made a loud noise when printing.

In addition, when the thermal transfer recording material obtained in Example 1 was subjected to circulation printing to confirm its abrasion resistance, it was found that the thermal transfer recording material obtained in Example 1 had a feeding distance of 100 km.
However, no head wear occurred.

On the other hand, the thermal transfer recording material obtained in Comparative Example 1 had a feeding distance of 1 km.
However, due to head wear or polyethylene terephthalate adhesion to the head, the head was destroyed and printing became impossible.

Example 2 Ge KM 76 a) was dried using viscous-beaten NBKP as a valve, and dumped to a coating weight of 1 g 7 m''K, and then rubbed on a super calender for 10 minutes.
．． A thin leaf-like support was prepared. A thermal transfer colored ink was coated on one side of this thin support using a 47 hot melt coater to obtain a thermal transfer recording material of the present invention.

Comparative Example 2 137 using viscous beaten NBKP as pulp
The paper was made from thin paper. The water was dumped and then passed through a supercalender to produce a thin 107-inch support. A thermal transfer colored ink was coated on one side of this thin support using a 47 hot melt coater to obtain a thermal transfer recording material.

In order to confirm the stick resistance of the thermal transfer recording materials obtained in Example 2 and Comparative Example 2 above, Thermalf (Company 2 Aximiri (manufactured by Matsushita Electronic Components Korea) was used.
In both the thermal transfer recording materials obtained in Example 2 and Comparative Example 2, no sticking occurred at all.

However, in order to confirm the abrasion resistance, a test was performed using a thermal printer (product name: EP-20, manufactured by Brother Co., Ltd.), and the thermal transfer recording material obtained in Example 2 had a feeding distance of 11.
001k, Ta205 which is the protective layer of the thermal head
On the other hand, in the thermal transfer recording material obtained in Comparative Example 2, the Ta205 layer was worn down by 37 mm at 1 km.

Further, the thermal transfer recording material obtained in Example 2 had no printing problems due to moisture absorption wrinkles, but the thermal transfer recording material obtained in Comparative Example 2 sometimes had moisture absorption wrinkles, which caused printing problems. .

Example 3 (Sweet) Coal $15.00) Stearamide (Nippon Ib-Ki brand name AP-1) was used in the same manner as in Example 1.
gAr?・The obtained thermal transfer recording material was processed to become (Unthermal printer (Brother Oke brand name: EP Sticking), and no frost image was generated and there was no sticking sound during printing.

Claims (1)

[Scope of Claims] 1. A thermal transfer recording material having a thermally transferable colored ink layer on the upper surface of a thin support, the lower surface of which is coated or impregnated with wax and/or a liquid or paste-like substance at room temperature. A thermal transfer recording material. 2. The thermal transfer recording material according to claim 1, wherein the liquid or paste-like substance at room temperature is composed of mineral oil, vegetable oil, and synthetic oil.