JPH02179783A - Production of stamp - Google Patents

Abstract

PURPOSE:To obtain a stamp of a sharp image in a simple manner by using a thermal transfer material, which has been already used for a printing on a transfer medium by a thermal transfer device. CONSTITUTION:A printing is applied to art paper through a thermal transfer material by a word processor having a thermal transfer device. This thermal transfer material which has been already subjected to printing is used as a negative. This negative is brought into close contact with a photosensitive resin and exposed to light by the irradiation of ultraviolet light, thereafter being developed with perchloroethylene to obtain a photosensitive resin stamp. This photosensitive resin stamp is fixed to a piece of wood serving as a support body with an adhesive double coated tape having an intermediate support layer of foam plastic. A mark stamped using the obtained stamp is almost unvariably sharp even if the stamp is used repeatedly for several tens of times.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a stamp such as a name stamp or a graphic stamp. In particular, it provides a method for easily obtaining a sharp stamp.

(Prior Art) Conventionally, in order to manufacture a seal, which is a stamp of one name, one figure, number, etc., it is necessary to stamp the original letters and numbers.

To manufacture convex stamps according to shapes, etc.

A method using a photosensitive resin is known. This method using a photosensitive resin has the advantage that a stamp can be produced relatively easily. First, a negative is made from the positive original, and then the negative is usually shaped into a plate and brought into close contact with a photosensitive resin and exposed.

Partially exposed photosensitive resin.

A stamp is obtained by developing with water, aqueous alkaline solution, organic solvent, etc. and removing the unexposed areas.

The sharpness of one image tends to deteriorate due to reprinting from positive to negative, and the process is complicated due to the large number of steps.

Although negatives can also be produced using photographic techniques.

This cannot be said to be an easy method for anyone to perform.

On the other hand, in addition to photosensitive resin, there is a known method for manufacturing stamps using traditional rubber. For example, a string of letters is made from printed letters that serve as a matrix, and a mold is made from plaster or the like using this string. There are known methods of manufacturing such as heating and pouring raw rubber into the mold and further heating and vulcanizing it, and engraving. Not only is the work process complicated and takes two hours, but it is difficult to say that anyone can easily create clear typeface.

(Problems to be Solved by the Invention) The present invention provides a method that allows anyone, even non-experts, to easily obtain a stamp with a sharp image.

[Structure of the invention]

(Means for solving problems) In the present invention, a photosensitive resin is exposed using a negative.

In a method of manufacturing a stamp by removing an unexposed area of a photosensitive resin, the negative is a thermal transfer material in which a transparent film is coated with thermal transfer ink, and after printing on a transfer target using a thermal transfer device. This is a method for manufacturing a stamp using the thermal transfer material.

The main feature of the present invention is that in manufacturing a stamp, a stamp with a sharp image can be easily obtained by using a heat-sensitive transfer material after printing.

Recently, with the spread of word processors, thermal transfer devices have become popular as a printing means for word processors.

Anyone can easily perform thermal transfer. Printing using a thermal transfer method can be easily performed without the need of an expert. Therefore, the negative of the present invention can be easily produced.

In addition, recent improvements in thermal transfer technology have enabled highly accurate printing, and this technology has made it possible to produce sharp stamps.

The negative in the present invention refers to a thermal transfer material obtained by applying thermal transfer ink to a transparent film after printing.

The thermal transfer material after printing is used as it is. The heat-sensitive transfer material after printing is exposed to light with its back side, that is, with the transparent film surface of the heat-sensitive transfer material facing the photosensitive resin surface.

Transparent films for thermal transfer materials include, for example, polyester films (polyethylene terephthalate, etc.), polyamide films (nylon, etc.), polyolefin films (polypropylene, etc.), cellulose films (triacetate, etc.), polycarbonate films, and the like. polyester film.

Heat Resistance 1: Most preferred because of its excellent mechanical strength, tensile strength, and tensile stability.

Moreover, conventionally known inks can be used as they are as the thermal transfer ink. Examples of such inks are paraffin wax, carnauba wax.

Ink colored with dyes or pigments can be used using a heat-melting substance such as waxes such as wood wax and beeswax as a binder agent. This ink can be applied to a transparent film by a hot melt coating method or a solvent coating method using a coating liquid in which the above compound is dispersed in a solvent. In addition to the ink layer, a heat-resistant back coat layer, a release layer, etc. can also be provided.

As the thermal transfer device serving as the printing means, a device such as a word processor can be used. A cassetted thermal transfer material can also be used. It goes without saying that the printed characters include not only letters and numbers but also one figure.

The photosensitive resin becomes insolubilized by ultraviolet irradiation. It can be appropriately selected from known liquid or solid forms. As examples of such photosensitive resins, commercially available ones can be used, but solid ones are preferred because they are easy for anyone to handle, such as polyisoprene and NBR.

It is made by using a polymer such as polyamide as a binder, mixing an acrylate monomer and a photopolymerization initiator, and molding the mixture into a sheet shape. Commercially available photosensitive flexo plates and photosensitive resin letterpress plates can be used.

In the present invention, since the photosensitive resin serves as the stamp, the thickness of the photosensitive resin used is usually 2 mm or more.

Furthermore, exposure and development in the present invention can be carried out by conventionally known methods.

The stamp obtained by developing, that is, removing the unexposed areas.

It is usually glued to a support such as a piece of wood or plastic.

Preferably, by adhering to a relatively elastic sheet-like support, operability is increased and stamp printing becomes clear. Such supports include 3-foam plastics and the like. It is convenient to use double-sided adhesive tapes in which the intermediate layer is foamed plastic. The method of adhering to the support includes fixing with an adhesive, fixing with a double-sided adhesive tape, and the like. A simple method is to fix it to a photosensitive resin board using double-sided adhesive tape.

This is the preferred method.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples Printing was carried out on art paper using a thermal transfer material (RioThermo manufactured by Toyo Ink) using a word processor equipped with a thermal transfer device as a printing device, and the thermal transfer material after printing was used as a negative.

This negative was brought into close contact with a photosensitive resin (Filoflex 2.84 mm, manufactured by BASF AG, West Germany), exposed to ultraviolet rays, and then developed with percolene.

The developed photosensitive resin size was fixed to a piece of wood as a support using a double-sided adhesive tape (Double Face, manufactured by Toyo Ink Manufacturing Co., Ltd.) whose intermediate support layer was a foamed plastic.

When stamping was performed using the obtained seal, a clear stamp was obtained that remained almost unchanged even after being repeated several thousand times.

Patent applicant: Toyo Ink Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. A method of manufacturing a stamp by exposing a photosensitive resin to light using a negative and removing the unexposed areas of the photosensitive resin, in which the negative is a thermal transfer material in which a transparent film is provided with a thermal transfer ink. A method for producing a stamp, characterized in that the heat-sensitive transfer material is used after being printed on an object to be transferred using a heat-sensitive transfer device.