JPH0655817A - High-quality ink ribbon - Google Patents

Abstract

PURPOSE:To provide an ink ribbon wherein even though a quantity of impregnation of ink, flexibility of the ribbon and wear prevention of a head pin are secured damage, preventing properties of the ribbon are improved extremely. CONSTITUTION:This is an ink ribbon made of woven fabric made of the woven fabric woven by making use of multifilament yarn as warp and weft and a high-quality ink ribbon wherein an individual filament constituting the ribbon is treated by a dispersant or a solution of fluorine containing resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink ribbon for impact printing, and particularly to a long-life ink ribbon.

[0002]

2. Description of the Related Art A woven cloth impregnated with ink is widely used as a single-color or multi-color ink ribbon used in printers of devices such as computers and word processors.

Ink ribbons are produced by weaving multifilament yarns such as nylon and polyester as warp and weft. Ink ribbons include endless ribbons and seamless ribbons. The endless ribbon can be obtained by obtaining a flat plain weave fabric, cutting it to a predetermined width so that the warp running direction is the length direction of the ribbon, and joining both ends. Seamless ribbon, after obtaining a tubular woven fabric by the bag weaving method,
It is obtained by cutting this in the radial direction, and the length direction of the ribbon becomes the weft running direction. The seamless ribbon requires a higher weaving technique than the endless ribbon, but the ribbon is seamless over the entire circumference of the loop, so that the quality is excellent.

Printing is performed by hitting the paper on the platen from behind the ink ribbon with a head pin. In this case, when the number of prints reaches several hundred thousand characters, at most about one million characters, the ink ribbon is damaged, the printing becomes unclear, and it is often impossible to use anymore. This is because the filaments forming the ribbon are damaged by repeated impact and friction by the tip of the head pin to cause filament breakage and become fluffy, and further, the fluffs adhere and accumulate on the mask to stain the paper.

The head pin also wears due to the pigment or the like carried on the ink ribbon.

In order to eliminate such troubles, (a) a method of devising a weave design, (b) a method of providing a protective layer such as a coating layer or a film on one side of the ink ribbon (Japanese Patent Laid-Open No. 59-164177). Japanese Patent Laid-Open No. Sho 60
No. 225778, No. 58-160166, No. 58-160167, No. 60-6
No. 0255, No. 61-37965, No. 62-157251, No. 63-60651.
(Claim of Japanese Utility Model Publication No. 63-112049, etc.), (c) A method of arranging a protective ribbon on the surface of the ink ribbon on the head side and adhering the two at both edges only (Claim of Japanese Utility Model Publication No. 51-1).
45207, JP-A-64-31670, JP-A-64-31670, JP-A-4-73181, etc.) have been tried.

[0007]

Among the above-mentioned measures, the method (a) of devising the weaving structure has a limit that it cannot be an essential solution in terms of preventing damage to the ribbon.

The method (b) in which a protective layer such as a coating layer or a film is provided on the entire surface of one side of the ink ribbon is expected to prevent damage to the ink ribbon, abrasion of head pins, and color mixture prevention in multicolor printing. However, the presence of the protective layer has the disadvantage that the amount of ink impregnated into the base fabric is reduced and the flexibility of the ink ribbon itself is impaired.

When the protective film is laminated on the base fabric, the method (c) in which both are adhered to each other only at the both edges can prevent a decrease in the amount of ink impregnated into the base fabric and also ensure the flexibility of the ink ribbon itself. . However, when actually trying this method, while the number of prints was small, the expected effect was obtained, but as the number of prints increased, the protective film was wrinkled or distorted or peeled from the base cloth, and therefore the protection was obtained. The film may be caught at the gear that drives the ribbon to run, and the ribbon may not run smoothly, which may cause troubles such as printing at the same location on the ink ribbon. Therefore, there is a problem in terms of durability such that the number of prints is reduced, but the number of prints is rather decreased, and this method cannot sufficiently achieve the intended purpose.

Under such circumstances, the present invention provides an ink ribbon which is remarkably improved in the damage preventive property of the ribbon while ensuring the ink impregnation amount, the flexibility of the ribbon, and the wear prevention of the head pin. The purpose is.

[0011]

The high quality ink ribbon of the present invention is a woven ink ribbon made from a woven fabric woven using multifilament yarns as warp and weft, and constitutes the ribbon. It is characterized in that each filament is treated with a dispersion or solution of a fluororesin.

The present invention will be described in detail below.

The woven ribbon ribbon is produced by weaving a multifilament yarn of polyamide or polyester as warp and weft. In general,
For example, 40d / 34f, 30d / 26f, 30d /
Use a multifilament yarn such as 12f,
Of course, it is not limited to these. Further, a yarn made of ultrafine fibers or ultrafine fibers can also be used.

As the woven ribbon, an endless ribbon, that is, a tape in which both ends of a tape are connected to each other to form a loop can be used. Also, a seamless ribbon, that is, a seamless ribbon obtained by slitting a tubular seamless woven fabric obtained by bag-weaving in the radial direction can be used.
Since the latter seamless ribbon is seamless, it is superior to the former endless ribbon.

The woven ribbon may be a single color ribbon or a multicolor ribbon. In the case of multiple colors, border lines are provided in advance in the longitudinal direction, and the areas sandwiched by the border lines are impregnated with the respective color inks.

In the present invention, the individual filaments of the woven cloth ribbon are treated with a dispersion or solution of a fluororesin.

Examples of the fluorine-containing resin include homo- or copolymers of fluorine-containing monomers such as tetrafluoroethylene, vinylidene fluoride and chlorotrifluoroethylene, or copolymers of fluorine-containing monomers with other monomers,
Examples thereof include resins having a structure in which a large number of long-chain fluorine-containing groups are branched pendantly from the main chain through ester bonds or ether bonds, and fluorine-containing silicon-containing resins. The resin includes low molecular weight ones.

To treat the individual filaments that make up the woven ribbon with the fluororesin dispersion or solution,
Any of a method of treating at the stage of multifilament, a method of treating at the stage of sizing at the time of weaving, a method of treating at the stage of woven fabric after weaving, a method of treating as a ribbon are adopted.

In this case, a dilute dispersion or solution suitable for treating the individual filaments is used. The concentration of the fluororesin in the treatment liquid is, for example, 0.001 to 5% by weight, particularly 0.002 to 1% by weight, and further 0.005 to 0.5% by weight.
It is desirable to set a low concentration such as weight%.
However, the above range is merely a guideline for the optimum value, and the concentration of the fluorine-containing resin in the treatment liquid may be outside the above range in some cases.

The high quality ink ribbon of the present invention is useful as an ink ribbon and a cassette used in a printer such as a computer and a word processor.

[0021]

In the ink ribbon of the present invention, the individual filaments of the multifilament yarn constituting the warp structure and the weft structure are treated with a dispersion or solution of a fluorine-containing resin, so that a sharpened pin is formed. Even if a blow is applied to the ribbon, the multi-filament in that part breaks and the filament escapes from the pin (that is, the pin slides without sticking to the filament), so ribbon damage and fluffing are effective. To be prevented. Therefore, the life of the ribbon is dramatically increased.

Further, the amount of the ink impregnated into the ribbon is hardly affected even by the treatment with the dispersion liquid or the solution of the fluorine-containing resin, and especially when the ink replenishment type cassette is used, no trouble occurs.

In addition, the treatment with the dispersion or solution of the fluorine-containing resin does not affect the flexibility of the ribbon, and also has an advantageous effect on preventing the abrasion of the head pin.

[0024]

EXAMPLES The present invention will be further described with reference to examples. Hereinafter, "%" means% by weight.

Example 1 A 40 d / 34 f nylon multifilament yarn was used as the warp and weft to obtain a tubular seamless woven fabric by a bag weaving method, which was then scoured and calendered by a conventional method, and then in the radial direction. It was blown to obtain a woven ribbon.

A water repellent containing a fluorine-containing resin having a structure in which a large number of long-chain fluorine-containing groups are pendantly branched from the main chain by ester bonds is diluted to give a fluorine-containing resin concentration of 0.3%.
After that, this diluted solution was impregnated with the above-mentioned woven fabric ribbon to sufficiently permeate the solution into individual filaments of the multifilament yarn, and then squeezed between the rolls,
It was dried at 100 ° C or lower. The ink ribbon thus obtained was inked.

The above ink ribbon is loaded in an ink ribbon cassette having a ribbon drive wheel, a driven wheel also serving as an ink transfer rotary member, and an ink tank made of felt, and the cassette is mounted on a printer to print. As a result, clear printing of at least 6 million characters was possible, and after the printing of 6 million characters, almost no damage or fuzz was observed on the ink ribbon. This ink ribbon can be expected to be capable of clear printing of about 10 million characters.

The above-mentioned ink ribbon did not lose its flexibility even when treated, and the head pin abrasion resistance was also preferable.

Comparative Example 1 When an ordinary ink ribbon without treatment with an aqueous fluororesin dispersion liquid was used, the sharpness was lost by printing 450,000 to 500,000 characters, and the ink ribbon was not damaged or fluffed. Remarkable.

Comparative Example 2 Polytetrafluoroethylene 5 was applied to the inner surface of the tubular seamless woven fabric after weaving, scouring and calendering of Example 1.
%, Tetrafluoroethylene-hexafluoropropylene copolymer 4%, paraffinic medium boiling solvent 25%, brightener / surfactant / viscosity modifier / stabilizer 12%, water 54
% Of the fluororesin-based aqueous dispersion was roll-coated, and dried with hot air at a temperature of 60 ° C. The one-side coated seamless woven fabric was cut in the radial direction to form an ink ribbon, and after inking, it was mounted in a cassette and the same printing test as in Example 1 was conducted. However, the definition of about 600,000 characters was lost and the ink ribbon became prominently damaged and fluffed.

Comparative Example 3 Polytetrafluoroethylene 7% was added to the inner surface of the tubular seamless woven fabric after weaving, scouring, and calendering of Example 1.
Fluororesin-based aqueous dispersion having a composition of 3% fluorine-based surfactant, 4% silicone oil, 22% paraffin-based medium boiling solvent, 12% brightener / surfactant / viscosity modifier / stabilizer, and 52% water. Roll coating, temperature 60 ℃
It was dried with hot air. The one-side coated seamless woven fabric was cut in the radial direction to form an ink ribbon, and after inking, it was mounted in a cassette and the same printing test as in Example 1 was conducted. However, the printing of about 600,000 characters lost the sharpness, and the damage and fluffing became noticeable on the ink ribbon.

Example 2 After plain weaving using 40d / 34f nylon multifilament yarns as warp and weft, slitted to a predetermined width in the warp running direction, and further using an endless ribbon having both ends joined, the same as in Example 1 When Example 1 was repeated except that the treatment with the treatment liquid of Example 1 was performed after the scouring of the woven fabric, favorable results according to Example 1 were obtained.

[0033]

The high-quality ink ribbon of the present invention has a remarkable effect that the damage preventive property of the ribbon is remarkably enhanced while ensuring the ink impregnation amount, the flexibility of the ribbon and the prevention of wear of the head pin.

Claims (1)

[Claims] 1. A woven ink ribbon produced from a woven fabric woven using multifilament yarns as warp and weft, wherein individual filaments constituting the ribbon are made of a fluororesin dispersion or solution. High quality ink ribbon that has been treated.