JPS61219695A - Multi-strike ribbon for dot printer - Google Patents

Abstract

PURPOSE:To prevent ground contamination from being generated even when a printed part is deformed to make contact with a transfer paper, by providing an ink layer comprising specified substances as main constituents and an overcoat layer on a film base. CONSTITUTION:A ribbon 1 comprises the ink layer 12 and the overcoat layer 13 sequentially laminated on a base film (film base) 11, the ink layer 12 comprising at least a resin, an oil poorly compatible with the resin, and a colored substance. The resin is used as a binder. The ribbon having the overcoat layer can be produced by a method wherein a solution of a wax and/or a resin in an organic solvent is applied to the ink layer, followed by drying and slitting the resultant material to an appropriate width. Accordingly, contamination through rubbing will not occur even when the ribbon is deformed at a printing part to make contact with a transfer paper, and upon printing, the overcoat layer is released and is adhered to the transfer paper together with the ink, giving a favorable printing quality.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to multi-strike leans used in wire tod printers.

[Prior art]

In wire tod printers, printing is performed using an ink-clean interposed between the head bin of the print head and the transfer paper, but when using the 7-appliz in-clean as before, this ink-clean There was little deformation, and even if deformed, recovery was quick, so there was little risk of staining during transportation. But recently,
In order to improve printing quality, 18-pin and 24-bin print heads were used instead of the conventional 9-pin print head, and moreover, two or more rows of these were arranged side by side in a staggered pattern. Along with this, multi-strike lean is being used more frequently than fabric in-clean.

By the way, this multi-strike lysine has a higher print density than Fabric In Clean, and can provide sharp and clear print quality, but when printing, the part that protrudes toward the transfer paper side by the head bin is deformed into a convex shape. It is often seen that this comes into contact with the transfer paper during conveyance and causes background stains on the transfer paper, and this tendency is noticeable when head bins are arranged in multiple rows.

〔the purpose〕

An object of the present invention is to provide a multi-strike ribbon that does not cause background smudges even when the printed area is deformed and comes into contact with transfer paper when printed with a dot impact printer.

〔composition〕

The multi-strike line for dot printers of the present invention is provided with an ink layer whose main components are a resin, an oil with poor compatibility with the resin, and a coloring substance on a film base material. It is characterized by being provided with/or an oatmar coat layer containing wax as a main component.

The present invention will be explained in more detail below with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing the positional relationship between the multi-strike ribbon 1 of the present invention, transfer paper (such as plain paper) 2, and head pin 3 during recording.

The ribbon 1 has a structure in which an ink layer 12 and an overcoat layer 13 are sequentially laminated on a base film (film base material) 11.

As the base film 11, polyester, nylon,
Film made of polyethylene, polypropylene, etc. with a thickness of 5
~50μm can be used, but ribbon 1
The thickness should be 6 to 35μ, considering the perforations and clarity of printing.
Something around m is desirable.

The ink layer 12 is made of resin, an oil that is poorly compatible with this resin,
It is composed of at least three components of coloring substances. The resin used here is used as an inder, and typical examples include vinyl chloride-vinyl acetate copolymer, polycarbonate, acrylic resin, and nylon.

Oils include vegetable oils such as castor oil, animal oils such as whale oil,
Examples include mineral oil such as machine oil.

In addition to cardin black, examples of coloring substances include phthalocyanine, alkali blue, oil blue, and lake red.

The ratio of the resin and the coloring substance is about 15 to 100 parts by weight of the latter to 100 parts by weight of the former. The appropriate ratio of the resin to the oil is 60 to 130 parts by weight of the oil to 100 parts by weight of the resin. resin 10
If the amount of oil is less than 60 parts by weight compared to 0 parts by weight, the printing density will be low and undesirable.On the other hand, if it is more than 130 parts by weight, the adhesive strength with the base film will be poor and the ink layer will peel off, which is disadvantageous. .

The thickness of the ink layer 12 is suitably 10 to 30 pm, preferably 12 to 25 pm, in view of printing unevenness and cost.

The overcoat layer 13 is mainly composed of resin and/or wax, but when a mixture of wax and resin is used, the mixed weight ratio is 100 parts of the former to 10 parts of the latter.
~500 copies is appropriate.

The waxes and resins used here are not particularly limited, but those with a melting temperature of 50° C. or lower cannot be used because they may cause blocking. Representative examples of waxes include No9 rough-in wax, carnauba wax, ester wax, rice wax, etc.; representative examples of resins include ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, Examples include low melting point I-lyethylene.

The thickness of the overcoat layer 13 is 0.5 to 5 μm, preferably 1 to 3 μm. If it is thicker than 5 μm, holes will not be formed properly when printing, and if it is thinner than 0.5 μm, there is a risk that it will peel off during transportation.

In order to produce a paper sheet having an overcoat layer according to the present invention, an organic solvent solution of wax and/or resin is applied and dried on the ink layer of a pressure-sensitive copying material prepared in the same manner as before. Just cut it to an appropriate slit width. It goes without saying that it may be possible to use the sheet as a multi-strike sheet for a dot-innoct printer without cutting it to the width of the slit.

In addition, in the present invention, the base film 1 may be used as necessary.
1 and the ink layer 12 may be provided with an adhesive layer having a thickness of 5 μm or less. Examples of the adhesive used in the adhesive layer include vinyl chloride-vinyl acetate copolymer, acrylic resin, and polyester resin.

Example 1 Vinyl chloride-vinyl acetate copolymer (Eslec C manufactured by Tanezu Kagaku Co., Ltd.) 10 parts by weight Methyl ethyl ketone 100 parts by weight Toluene 20 parts by weight Lanolin fatty acid metal soap 17 parts by weight Carmen black 5 parts by weight Alkali blue
An ink liquid was prepared by dispersing a mixture consisting of 1 part by weight in a sail mill for 12 hours, and this
Coated on a μm thick polyester film and heated to 100°C.
After drying for a minute, a pressure-sensitive copying material having an ink layer thickness of about 20 μm was prepared. Next, on the ink layer of this product, an oatsmer coating liquid prepared by dispersing a mixture of the following formulation at 70°C for 12 hours in a sail mill was applied, and dried at 100°C for 1 minute to form an overcoat layer with a thickness of about 1.5 μm. Make a pressure-sensitive copying material with
Inventive product 1) was obtained.

Rice wax 7 parts by weight Ethylene-vinyl acetate copolymer 3 parts by weight Toluene
80 parts by weight A product obtained in the same manner except that no overcoat layer was provided was used as a comparative product.

Example 2 An overcoat solution prepared by stirring a mixture of the following formulation was applied onto the ink layer of the pressure-sensitive copying material before the overcoat of Example 1, and dried at 100°C for 1 minute to form a layer of about 1 μm thick. Making a pressure-sensitive copying material with an overcoat 12.7
This was cut into m-wide strips (product 2 of the present invention).

Ethylene-vinyl acetate copolymer: 10 parts by weight Toluene: 80 parts by weight Example 3 A mixture of the following formulation was added to the ink layer of the pressure-sensitive copying material before overcoating in Example 1 at 70°C in a sail mill.
Apply an overcoat solution prepared by dispersing for 2 hours,
A pressure-sensitive copying material with an overcoat approximately 2 μm thick was prepared by drying at 100°C for 1 minute and cut into 12.7 mm width.
Men (product 3 of the present invention) was obtained.

Noq rough-in wax 10 parts by weight Toluene 90 parts by weight About these four ingredients Ricoh word processor RIP
Print density and degree of scumming were evaluated using ORT 420 (equipped with wire tod printer). The results were as shown in Table-1.

Table 1 [Effects] The inkritan of the present invention has an overcoat layer on its surface, so even if it is deformed in the printing area, it will not cause stains when it comes into contact with the transfer paper, and it will not stain when printed. The overcoat layer peels off and sticks to the transfer paper along with the ink, resulting in good print quality.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the positional relationship of the transfer paper, return paper, and head bin when printing is performed using the IJ and 3J printers of the present invention, and FIG. 2 is a diagram showing the printed state.

Claims (1)

[Claims] 1. An ink layer mainly composed of a resin, an oil with poor compatibility with the resin, and a coloring substance is provided on the film base material, and an overcoat mainly composed of a resin and/or wax is provided on top of the ink layer. A multi-strike ribbon for dot printers characterized by having layers.