JPS60219094A - Transfer material for thermal recording - Google Patents

Abstract

PURPOSE:To provide the titled transfer material free of dropout in images and free of sticking, wherein a coloring material layer is provided on the upper side of a film form base, and a polymeric composition layer comprising a fine powder, a surface active agent and a polymeric substance is provided on the lower side of the base so that the surface of the composition layer is roughened by the fine powder. CONSTITUTION:The coloring material layer (comprising a pigment, a dye and a color former) 5 is provided on the upper side of the film form base (e.g., a polyethylene terephthalate film) 4, and the polymeric composition layer 6 comprising a fine powder (e.g., synthetic amorphous silica) 7, a surface active agent (e.g., a cationic surface active agent) 8 and a polymeric substance (e.g., a silicone resin), optionally with a liquid lubricant (e.g., dimethyl polysiloxane) or a solid lubricant (e.g., stearyl alcohol) is provided on the lower side of the base 4 so that the fine powder 7 is not only present in the inside part of the layer 6 but exposed to the surface of the layer 6, to obtain the desired transfer material.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transfer body for thermal recording used for recording by thermal transfer.

A schematic cross-sectional view of a transfer body for heat-sensitive recording (hereinafter referred to as the transfer body) is shown in FIG. Layer 3 is a polymer composition layer.

When a polymer film such as polyethylene terephthalate (hereinafter abbreviated as PET) is used as the substrate 1, the so-called stick phenomenon occurs in which the substrate adheres to the thermal head due to thermal melting of the substrate due to the heat pulse of the thermal head or static electricity generated during running. Occur. As a result, the base body does not run stably on the thermal head.

Therefore, a heat-resistant protective film is provided on the lower surface of the substrate (Japanese Unexamined Patent Publication No. 56-746'7), and a stick prevention layer made of a highly slippery inorganic pigment and a thermosetting resin material with a high softening point and external dimension is used. (Japanese Unexamined Patent Publication No. 155794/1983)
Proposals have been made to provide a resin layer containing a surfactant or an organic salt that is solid or semi-solid at room temperature (Japanese Patent Application Laid-open No. 129789/1989).

However, there is a problem in that the polymeric material or additives are scraped off and accumulated on the heating element due to uneven pressure of the various latin and thermal heads on the stick as described above, resulting in dropouts in the image. There has occurred.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned conventional drawbacks and to provide a transfer member that does not cause image dropouts and does not stick.

Structure of the Invention According to the present invention, a polymer composition layer made of fine particles, a surfactant, and a polymer substance is provided on the lower surface of a substrate, and the surface of the polymer composition layer is roughened by the fine particles. There is.

Further, if necessary, a liquid lubricant, a solid lubricant, or both a liquid lubricant and a solid lubricant may be added to the polymer composition layer.

Since the surfactant prevents sticking, the particulates act as a barrier to prevent dropout.

In other words, the surface of the polymer composition layer, which has been roughened by adding fine particles, absorbs the sharp unevenness on the head, so no deposits are generated on the heating element. Since the occurrence of dropout can be prevented, the stick prevention effect of the surfactant can be fully utilized.

In addition, stickiness can be more effectively prevented by using a combination of a surfactant and a liquid lubricant, a surfactant and a solid lubricant, or a combination of a surfactant, a liquid lubricant, and a solid lubricant.

Description of examples Examples of the present invention will be described below.

FIG. 2 shows a schematic cross-sectional view of a transfer body as an embodiment of the present invention. A coloring material layer 5 is provided on the upper surface of the substrate 4, and a polymer composition layer 6 is provided on the lower surface. The polymer composition layer 6 includes fine particles 7, surfactant 8. It is composed of polymeric substances. The fine particles 7 are contained so as to be exposed not only inside the polymer composition layer 6 but also on the surface thereof.

It is also effective for the polymer composition layer 6 to further contain a liquid lubricant, a solid lubricant, or both a liquid lubricant and a solid lubricant, if necessary.

The material of the fine particles is not particularly limited, and may include metal,
Various inorganic and organic particles can be used. Examples include metal oxides, metal sulfides, metal carbides, metal nitrides, metal fluorides, graphite, fluoride, and the like.

Especially synthetic amorphous silica, carbon black, alumina,
Titanium oxide, calcium silicate, aluminum silicate, etc. are promising.

Synthetic amorphous silica has anhydrous silica and hydrous adhesive properties. As the anhydrous silica, ultrafine particles produced by a gas phase method are useful. For example, high-purity ultrafine particulate silica (product name: Aerosil 2 Nippon Ashin Rosil Co., Ltd.) developed by West German Degussa, aluminum oxide and titanium oxide (both Nippon Aerosil Ltd.) etc.

As hydrated silica or white carbon, for example,
Shionogi & Co., Ltd. “Carplex”.

Nippon 7 Rikae Gyo Co., Ltd.'s ``Nipnol'', Mizusawa Chemical Industry Co., Ltd.'s ``Silt/'', Tokuyama Soda Co., Ltd.'s ``Finenol, Tokunor'', etc. are commercially available.

Since silica may react with dyes depending on the characteristics of the dye used, it is recommended to use hydrophobic silica in which the lanol groups present in silica are chemically bonded by partial substitution with methyl groups or organic silicon compounds. can.

The addition ratio of fine particles to polymeric substance is 0.1 to 200.
Can be used within the weight range. Especially when the addition ratio is 5
It shows stable characteristics in the range of ~100 weight coefficient. Ultrafine particles are well dispersed by ultrasonic waves, triple rolls, homogenizers, and the like.

Regarding the size of the fine particles, it is preferable that the smaller the particle size, the less the influence on the image quality, and especially when the average particle size is 6 μm or less, dropout hardly occurs.

There are no particular limitations on the material used for the polymeric substance, such as various thermoplastic resins, heat, and light.

Various types of curable resins cured by electron beam or the like can be used. In particular, various curable resins have good adhesion to the substrate and heat resistance.

Examples include silicone resins, epoxy resins, unsaturated aldehyde resins, urea resins, unsaturated polyester resins, alkyd resins, furan resins, oligoacrylates, and the like.

Among these, oligoacrylate cured resins exhibit excellent properties. In addition, the resin cured by light or electron beams is easily cured in a short period of time, and there is almost no transfer of unreacted resin, curing agent, etc. to the back surface of the base material, making it easy to produce long transfer bodies. ,
Shows good properties.

For example, light- or electron beam-curable resins of oligoacrylates, or photo-curable resins of epoxy resins catalyzed by aromatic diazonium salts, aromatic iodonium salts, or aromatic sulfonium salts are excellent.

As the oligoacrylate, for example, polyol acrylate-polyester acrylate.

Epoxy acrylate, urethane acrylate.

Silicone acrylate, polyacecool acrylate, etc. Epoxy resins include, for example, vinylcyclohexene dioxide, 3,4-epoxy/cyclohexylmethyl-
There are cycloaliphatic epoxy resins such as 3,4-epoxycyclohexane carboxylate.

Furthermore, a reactive diluent such as tetrahydrofurfuryl acrylate or lauryl acrylate may be added to the resin.8 The film thickness of the polymer composition is not particularly limited. Generally, from the manufacturing point of view, polymer compositions having a film thickness of 0.1 μm or more are easy to obtain and exhibit uniform properties.

As the surfactant, various conventionally well-known surfactants can be used.

For example, various anionic surfactants such as carboxylates, sulfonates, sulfate ester salts, phosphate ester salts, various aliphatic amine salts, aliphatic quaternary ammonium salts, aromatic quaternary ammonium salts, heterocyclic 4 various cationic surfactants such as ammonium salts, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl 7
- /l/ etc. (7) x -chill type, ether ester type such as polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbicun fatty acid ester, polyethylene glycol fatty acid ester, fatty acid monoglyceride.

Various nonionic surfactants such as ester types such as sorbitan fatty acid ester, propylene glycol fatty acid ester, and cibosugar fatty acid ester, and nitrogen-containing types such as fatty acid alkanolamide, polyoxyethylene fatty acid amide, polyoxyethylene alkylamine, and alkylamine oxide. various betaine type, aminocarboxylate type, various amphoteric surfactants such as imidacillin derivatives, fluoroalkyl (C
2-C2o) carboxylic acid, monoperfluoroalkyl (
06-C16) Various fluorosurfactants such as ethyl phosphate and perfluorooctane sulfanoic acid jetanolamide.

Various modified silicone oils such as polyether modified silicone oil, carboxyl modified silicone oil, alkyl aralkyl polyether modified silicone oil, epoxy Φ polyether modified silicone oil, various copolymers of polyoxyalkylene glycol and silicone, etc. There are silicone surfactants.

Furthermore, surfactants called polymeric surfactants, organometallic surfactants, 9-reactive surfactants, and the like can also be used in the present invention.

Noricone-based and fluoro-based surfactants are particularly excellent.
When the above-mentioned surfactants are used in combination with silicone-based or fluoro-based surfactants, the effect on preventing staining is excellent. The effect is remarkable when two or more surfactants with a distance of 3 or more are used in combination.

A liquid lubricant is a substance that is liquid at 26° C. and 1 atm and exhibits lubricating properties.

For example, silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrodienepolysiloxane, fluorosilicone oil, alkylbenzenes, polybutenes, alkylnaphthalenes,
Synthetic oils such as alkyldiphenylethanes and phosphoric acid esters, saturated hydrocarbons, animal and vegetable oils, mineral oils, glycols such as ethylene glycol, propylene glycol, and polyalkylene glycols, glycerin and glycerin derivatives, esters such as butyl stearate, fluids There are paraffin etc.

A solid lubricant is a lubricant that is solid or semi-solid at 25° C. and 1 atmosphere. For example, various alcohols such as stearyl alcohol and mannitol.

Fatty acids such as stearic acid and montanic acid, fatty acid esters such as stearyl stearate, cetyl palmitate, and pentaerythritol tetrastearate, waxes such as microcrystalline wax and polyolefin wax, and their partial oxides, straw, and chloride. aliphatic hydrocarbons such as balmitic acid amide, ethylene bisstearate, etc. 1) Fatty acid amides such as nitric acid amide, metal soaps such as calcium stearate and aluminum stearate, graphite, molybdenum disulfide, and ethylene tetrafluoride.

Carbon fluoride, talc, etc.

The substrate used in the present invention is not particularly limited as long as it is a polymer film, and examples include ester polymers such as polyethylene terephthalate, polyethylene naphthalate, and polycarbonate, amide polymers such as nylon, acetyl cellulose, and cellophane. fluorine-based polymers such as polyvinylidene heptanoide, 47-oxyethylene-hexapropylene copolymer, Teflon, etc.
Ether polymers such as polyoxymethylene and polyacetal, polystyrene, polyethylene, polypropylene,
Olefin polymers such as methylpentene polymers, imide polymers such as polyimide, polyamideimide, polyetherimide, etc. can be used.

In particular, polyester polymers are useful because they are thin, have a certain degree of heat resistance, and are inexpensive.

In addition, imide-based polymers, which are more heat resistant than polyester-based polymers,
For polymers such as amide-based polymers, when using the transfer material repeatedly,
It is useful as a substrate because it has excellent heat resistance when used at high speeds.

The coloring material layer is not particularly limited, and various electrostatic layer configurations used in the Wax, Nox method, sublimation dye method, etc. can be used. Color materials include pigments, dyes, and color formers. As the sublimable dye, a dye that starts to sublimate or evaporate at 30Q°C or lower can be used, such as a basic dye.

There are disperse dyes, etc.

This will be explained in more detail below.

Example 1 A PET film with a thickness of 12 μm was used as the substrate.

Each coating liquid (Pump 1 to &4) having the composition shown in Table 1 was prepared.

Coating solution No. 1 was applied to the lower surface of the PET film using a wire bar, the solvent was evaporated with hot air at 60° C., and then cured by irradiation with a 1 KW high-pressure mercury lamp.

The same procedure was applied to each of the coating solutions No. 2 to No. 4 to obtain a PET film having a polymer composition layer on the lower surface.

Next, 2 parts by weight of a sublimable dye represented by the following molecular structure,
An ink mixture of 4 parts by weight of polycarbonate and 100 parts by weight of methylene chloride was coated with a wire glue on the top surface of the PET film processed as described above at λ0, and then dried with hot air at 60°C to produce four types of transfer bodies. .

Using each of the transfer bodies, recording was carried out on A-5 plate activated clay coated paper under the following thin-film thermal head recording conditions.

Linear density of main and sub-scanning = 4 dots/mm Recording power
Heating time of 0.7 W/dot head: 2 to 8 m5 Recording time of one line: 33,'s ms Recording area: A-6 version The results of this test are shown in Table 1. Coating liquid LI according to the present invention
r &2 does not generate stick even at 8mB,
Moreover, there were no occurrences of dropouts. On the other hand, Comparative Example 3 stuck for 3 ms and the transfer body was melted and cut, so it was impossible to evaluate dropout. Also, comparative example f. In No. 4, dropout, which causes white lines (unprinted areas) in the image, occurred on the first sheet of A-5 size.

Margin below Example 2 A PET film with a thickness of 9 μm was used as the substrate.

In each coating solution shown in Table 2, in addition to the solvent and sensitizer, 1 contains fine particles, a liquid lubricant, a surfactant, and a polymeric substance, and 2 contains fine particles, a solid lubricant, a surfactant, and a polymeric substance. Contains molecular substances, including fine particles, liquid lubricants, solid lubricants, surfactants and polymer substances. Thereafter, in the same manner as in Example 1, a polymer composition layer was formed from each of the above coating liquids on the lower surface of the substrate, and a coloring material layer was formed on the upper surface to prepare three types of transfer bodies. A dropout occurrence test was conducted by increasing the recording power applied to the head to 0.77W.

The test results are shown in Table 2. Coating Wi according to the present invention,
L1-tK3 did not cause stick even at 0.77'W and 8 ms, and no dropout occurred.

Effects of the Margin Invention As described above, the transfer body of the present invention has no dropouts and does not stick to images, so it can provide a large number of high-quality and inexpensive images, and can also be used for high-speed recording. Available.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional transfer body for thermal recording, and FIG. 2 is a schematic sectional view of a transfer body for thermal recording according to an embodiment of the present invention. 4...Substrate, 5...Coloring material layer, 6...Polymer composition layer, 7...Fine particles, 8...
surfactant. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (4)

[Claims] (1) A coloring material layer is provided on the top surface of a film-like substrate,
A transfer body for thermal recording, wherein a polymer composition layer containing fine particles, a surfactant, and a polymer substance is provided on the lower surface of the substrate, and the surface of the polymer composition layer is roughened by the fine particles. . (2) A transfer body for thermal recording according to claim 1, wherein the polymer composition layer comprises fine particles, a liquid lubricant, a surfactant, and a polymer substance. (3) A transfer body for thermal recording according to claim 1, wherein the polymer composition layer comprises fine particles, a solid lubricant, a surfactant, and a polymer substance. (4) A transfer body for thermal recording according to claim 1, wherein the polymer composition layer comprises fine particles, a liquid lubricant, a solid lubricant, a surfactant, and a polymer substance.