JPH0443079A - Thermal transfer 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] [Objective of the Invention] [Industrial Application Field] The present invention relates to a method of imprinting data on an X-ray photograph, and more specifically, the present invention relates to a method of imprinting data on an X-ray photograph, and more specifically, for example, a thermal transfer type word processor, a label printer, a barcode printer, etc. To write the required data on paper or a label and place it on the X-ray photographic film or paste it on the subject, so that the data can be imprinted on the X-ray photographic film when taking the X-ray photograph. Regarding the method.

[Conventional technology]

When taking an X-ray photograph of a human body or other object, the date of the photograph, the name, age, gender, and other necessary data of the person to be photographed are usually imprinted on the film at the same time. For this purpose, a conventional method has been adopted in which lead single-character type, which is difficult for X-rays to pass through, is manually arranged and attached to one corner of the film cassette.

However, when using this method, the work of arranging single-character type is extremely complicated, and the amount of data to be imprinted is naturally limited.

Also known is a data imprinting device in which a lead foil serving as a writing surface is exposed and the lead foil is held between films. To use this device, the lead foil is scraped off, which makes it somewhat easier to write on, but the area covered with lead foil unnecessarily blocks X-rays, so There are many parts of the film that cannot be used for photography.

Therefore, for example, in Japanese Patent Publication No. 62-27704,
A paste-like paint is prepared by mixing fine powder of lead compounds such as lead oxide, white lead, and lead sulfide with a quick-drying binder.
For example, a method has been proposed in which required data is written on each folded piece of paper using the above-mentioned coating material so that a double copy is obtained after imaging, and this is pasted onto an X-ray photographic film. However, even when using this method, it is not easy to record the data in such a way that it is exactly double-copied (also, because the paint is a paste containing fine powder of lead compounds) The fine powder tends to settle, requiring stirring immediately before use, or requiring a special writing instrument, and moreover, the writing properties are poor.

Furthermore, the paint tends to dry out during storage (and has poor storage stability).
Alternatively, it is not safe, as it is easily flammable.

For example, in Japanese Patent Publication No. 1-124841,
A method has been proposed in which data is written on a sheet using a marking pen containing a line-blocking agent, but even with this method, the data that can be written is limited to handwritten characters.

[Problem to be solved by the invention]

The present invention was made in order to solve the above-mentioned problems in the conventional methods of imprinting data on X-ray photographs. Use a barcode printer, etc. to write the required data such as characters, symbols, and barcodes on paper or labels, and send this data directly to the
An object of the present invention is to provide a method for imprinting on an X-ray photographic film during radiography.

[Structure of the invention]

[Means for Solving the Problems] That is, the present invention provides a heat-sensitive transfer material in which a heat-melt ink layer is formed on a base material, in which the heat-melt ink layer comprises:
Regarding a thermal transfer material containing 10 to 95 weight percent of an element or a compound having an atomic number of 47 or more (excluding rare gas elements), preferably an atomic number of 56 or more, as an X-ray shielding agent. It is. When recorded with a thermal head using this heat-sensitive transfer material, it is possible to obtain a recorded matter with sufficient resolution of arbitrary characters, symbols, etc., and the recorded matter can be superimposed on an X-ray photographic film, or Data can be imprinted onto X-ray photographic film by pasting it on the subject.

As the X-ray shielding agent according to the present invention, an element or a compound of an element having an atomic number of 47 or more (excluding gas elements) is used. Elements with an atomic number less than 47 cannot provide a sufficient X-ray shielding effect.

The larger the atomic number, the more effective the X-ray shielding effect is, and preferably those with an atomic number of 56 or more are preferred.In the present invention, the following are examples of single substances or compounds preferably used as an X-ray shielding agent. can.

Ag, ^gF+ AgCj! +5bcz3. C5t
SO3,C5tMOOa+Ba5On+ CaWOn+
NazWO, KztllOa, PtC1! at A
u+＾ucj! ＊＋ ogNo,, PbCj! , B
iCj! 3+ BizOs*Furthermore, according to the present invention, the heat-melting ink layer may contain a coloring material, if necessary. Further, a layer containing a coloring material may be provided in addition to the heat-melting ink layer containing the X-ray shielding agent.

In order to provide a hot melt ink layer or a colored layer containing the X-ray shielding agent of the present invention on a base material, a hot melt coating method or, more preferably, a solvent coating method using a coating liquid in which the above compound is dispersed in a medium is used. There is a way. A suitable coating amount is 0.5 μm to 30 am. 0.5μm
If it is less than 30 μm, the X-ray shielding effect will be reduced, and if it is more than 30 μm, when the transfer material is wound into a roll, the roll will become thick and the energy sensitivity will decrease.

A conventionally known base film can be used as the support of the present invention. For example, polyester film (polyethylene terephthalate, polyethylene naphthalate, etc.)
, polyamide films (such as nylon), polyolefin films (such as polypropylene), cellulose films (such as triacetate), and polycarbonate films.

Polyester film is the most preferred because it has excellent heat resistance, mechanical strength, tensile strength, and tensile stability. The thinner the base material is, the better its thermal conductivity is, but from the viewpoint of strength and ease of coating with the ink layer, it is most preferably 3 to 50 microns.

Furthermore, a back coat layer made of a heat-resistant resin may be provided on the opposite side of the heat-melting ink layer of the base material.

For the heat-fusible ink layer of the present invention, conventionally known composition components can be used as they are. Examples include those colored with the above-mentioned dyes and pigments using wax and thermoplastic resin as a binder. Waxes include candelilla wax, carnauba wax, rice wax, Japanese wax, vegetable waxes such as jojoba oil, beeswax,
Animal waxes such as lanolin and spermaceti, petroleum waxes such as montan wax and petrolatum, synthetic waxes such as Fuscher Tropish wax and synthetic hydrocarbons such as polyethylene wax, modified waxes such as montan wax derivatives, hydrogenated castor oil, and hydrogenated waxes. Hydrogenated waxes such as castor oil derivatives; fatty acids such as lauric acid, palmitic acid, myristic acid, stearic acid, and 12-hydroxystearic acid; waxes such as fatty acid amides, fatty acid anilides, and imido wax; resins such as acrylic and styrene , rosin type, vinyl type, acetal type, and rubber type are preferred.

The above hot melt ink may contain a small amount of plasticizer, if necessary.
Additives such as dispersants, activators, antistatic agents, stabilizers, etc. can be mixed.

(Example) Hereinafter, the present invention will be explained in detail with reference to Examples.

All parts in the examples represent "parts by weight."

Example 1 A coating liquid with the following composition was coated onto a 6 μm polyethylene terephthalate film using a gravure coating method to a thickness of 6 μm.
A thermal transfer material was obtained.

Bit's (made by Nippon Kayaku) 50 parts Polyamide resin 1 part (DPX-640 made by Henkel Hakusui) Carnauba wax (made by Noda Wax ■) 10 parts Isopropyl alcohol 39 parts Example 2 A hot melt ink with the following composition was mixed into a 6 μm thick film. The mixture was coated onto a polyethylene terephthalate film using a hot melt coating method to a coating thickness of 15 μm to obtain a heat-sensitive transfer material.

460 parts of Ba50 (precipitated barium sulfate manufactured by Sakai Chemical Industry ■ $100) Ethylene-vinyl acetate copolymer 3 parts (Evaflex manufactured by Mitsui Polychemical ■) Carbon black (Mitsubishi Carbon MA-7) 5 parts Paraffin wax
25 parts (manufactured by Nippon Seiso 150°F) Carnauba wax (manufactured by Noda Wax) 7 parts Example 3 A coating liquid with the following composition was coated on a 6 μm polyethylene terephthalate film by gravure coating to a thickness of 2 μm.
It was applied to.

Carbon black (Mitsubishi Carbon MA-7) 7 parts Ethylene-vinyl acetate copolymer 3 parts (Evaflex manufactured by Mitsui Polychemicals) Rice wax (manufactured by Noda Wax ■) 10 parts Toluene
56 parts methyl isobutyl ketone
24 parts Furthermore, 10 μml of a coating liquid having the following composition was applied onto the colored layer by gravure coating to obtain a heat-sensitive transfer material.

CaWOn (made by Wako Pure Chemical Industries ■) 60 parts Polyamide resin 5 parts (made by Henkel Hakusui DPX-640) Rice wax (made by Noda Wax ■) 10 parts Isopropyl alcohol 25 parts or more Printed with a label printer using three types of thermal transfer materials However, when it was attached to the abdomen of a human body and an X-ray photograph was taken at 75 KV, the characters could be fully recognized.

Patent applicant: Toyo Ink Manufacturing Co., Ltd.

Claims (1)

[Scope of Claims] 1. In a thermal transfer material formed by forming a heat-fusible ink layer on a base material, the heat-fusible ink layer contains an element having an atomic number of 47 or more (rare gas element) as an X-ray shielding agent. A thermal transfer material characterized by containing a single substance or a compound of (excluding). 2. The heat-melting ink layer contains the X-ray shielding agent in an amount of 10 to 9
The thermal transfer material according to claim 1, containing 0% by weight.