JPS61246083A - Ink ribbon - Google Patents

Abstract

PURPOSE:To reduce abrasion of dot pins, by using an organic pigment as a coloring agent in a liquid ink with which a base fabric is impregnated. CONSTITUTION:The base fabric is formed from polyamide fibers or polyester fibers, and the liquid ink comprises a coloring agent dispersely mixed in a vehicle comprising a nondrying oil as a main constituent. The oil is a mineral oil, a vegetable oil, an animal oil or the like, while the coloring agent is an organic pigment based on aniline, cyanine, azo, phthalocyanine, azine or the like, at least one of which is used singly or in combination. When this ink ribbon is used, an effect of markedly reducing abrasion of dot pins is obtained, for dot pins formed of an iron-based material such as high-speed steel, piano wire and stainless steel, tungsten, super hard metal alloy or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ink ribbon used in printers, typewriters, etc., and more particularly to an ink ribbon having a base fabric impregnated with liquid ink.

[Prior art and its problems 1] This type of ink ribbon uses carbon black, which is less resistant to heat and is less resistant to heat than dyes, as a coloring agent for the ink, but the ink does not adhere to the dot pins of the impact dot head. This has the disadvantage that it adheres and severely abrades the printing surface, leading to the inability to print and significantly shortening the service life. In general, this wear is related to printing force, printing speed, and bottle material (Suzuki wI magazine, '84/9, Vol. J67-CNo.
9).

For example, this wear is caused by the stress and force applied to the dot bin being 15
~ At ZOkg/xx2, the printing speed is 240 characters in 7 seconds, and the dot pin of the iron fan is 110 to 290 μ per 100 million dots! ,
80 to 110 μl per 100 million dots of tungsten,
It was made of cemented carbide and had a thickness of about 7 to 26 μm. Therefore, when a special mission was required, expensive cemented carbide was used.

[Measures to Solve the Problem Pi1] The present invention solves these drawbacks of conventional inks by using an organic pigment, which is softer than an inorganic pigment, as a colorant for the ink.

[Effect 1] Due to the flexibility of the organic pigment, the abrasion caused by scratching the dot pins was significantly reduced, and the degree of abrasion was reduced to 173 or less, preferably 175 or less, to about 1710 compared to the conventional method. In other words, the lifespan is approximately 3 to 10 times longer than when conventional ink ribbons are used.

[Example] Next, the present invention will be specifically illustrated.

As the base fabric, polyamide fibers or polyester fibers such as nylon 6 or nylon 66, which are conventionally used for ink ribbons, are used.

Liquid ink is a mixture and dispersion of colorant in a vehicle whose main component is non-drying oil, and it has a strength of 200-300eP at room temperature.
It preferably has a viscosity of 800-1600 cP; if the viscosity is too high, the dot performance at low temperatures will be poor; if the viscosity is too low, the print will bleed. As the oil, conventionally known mineral oils, vegetable oils, animal oils, etc., and motor oil, dynamo oil, castor oil, etc. can be suitably used.

Further, wax may be appropriately mixed and dispersed in order to improve the fixability to recording paper.

In addition, various surfactants can be appropriately used for the purpose of improving the dispersibility of the colorant and adjusting the viscosity.

As the coloring agent, organic pigments such as aniline type, cyanine type, azo type, 7-thalocyanine type, and anone type can be used alone or in combination of two or more types.

It is also good to use various dyes as supplementary colorants.

Target bins include iron-based materials such as high-speed steel, piano wire, and stainless steel, as well as tungsten and carbide metals!
! This has the effect of significantly reducing wear on dot bins made of any material.

In particular, iron-based materials have a lower specific gravity than those made of tungsten or cemented carbide, so they are ideal for high-speed printing.

Next, an example will be explained.

Example 1 108s of oil-soluble dye, 15 parts of 72IJ-based organic black pigment, and 35 parts of sorbitan fatty acid ester were added to 25 parts of mineral oil (by weight, the same applies hereinafter) and 25 parts of vegetable oil as a vehicle, and the mixture was mixed with three rolls. A printer ribbon was prepared by uniformly kneading the mixture. This product was applied to a nylon base fabric for a printer ribbon using a roll coater to prepare a printer ribbon.

The printer ribbon thus etched is attached to an impact dot printer made of a high-speed steel dot bin.
The degree of wear of the dot bin was examined by continuously operating the printer for a long time at a printing speed of 240 characters in 7 seconds. As a result, the stress caused by the wear of the high-speed steel dot bottle due to the ink is 1.
At 7kFI/111, it was approximately 10 μl per 100 million dots.

Example 2 An ink ribbon was prepared in the same manner as in Example 1 except that the organic pigment used in Example 1 was changed to cyanine, and a test was conducted using the same printer.

As a result, the ink was applied to the high-speed steel.
It was approximately 15 μl per 100 million dots of Todoroki.

Example 3 An ink ribbon was prepared in the same manner as in Example 1 except that the organic pigment used in Example 1 was 7-talocy7ine, and tested using the same printer.

As a result, the wear of the high-speed steel dot bottle due to the ink was about 40/J per 1 gt dot when the stress was 17 kg 7 ax2.

Example 4 An ink ribbon was prepared in the same manner as in Example 1 except that the organic pigment used in Example 1 was 7zo-based, and tested using the same printer.

As a result, the wear of the high-speed steel dot bottle due to the ink was approximately 35 microns per 100 million dots when the stress was 171 g7xa2 and the speed was 240 characters/sec.

Example 5 An ink ribbon was prepared in the same manner as in Example 1, except that the organic pigment used in Example 1 was 7-gin, and tested using the same printer.

As a result, the stress caused by the wear of the high-speed steel dot bottle due to the ink is 17 kl? /■2: Approximately 3 per 100 million dots
It was 0 μs.

Example 6 An ink ribbon was prepared in the same manner as in Example 1 above, except that the organic pigment in Example 1 was changed to 10 parts of 7=+7-based and 5 parts of 7-lycyanine, and tested using the same printer. Did.

As a result, the wear of the high-speed steel dot pin due to the ink is 100 million dollars when the stress is 17 kg/xz2 and the speed is 240 characters/second? The diameter was approximately 15 μm.

Experiments were conducted using the above-mentioned stupid dot pins made of iron fan such as piano wire and stainless steel, and those made of tungsten or cemented carbide, but all iron-based dot pins showed the same degree of wear as in each of the above examples. In the case of those made of cemented carbide or cemented carbide, the degree of wear was only about half of that shown in each of the examples above.

In addition, when two or more of the Baka organic pigments of Example 6 were used as a mixture, a good abrasion reducing effect was also exhibited.

Patent Applicant: Oki Electric Industry Co., Ltd., 1 Patent Attorney: Sota Asuna, and 1 other person Procedural Amendment (Voluntary) May 2, 1985 2. Name of the Invention Ink Ribbon 3. Relationship with the Person Making the Amendment Patent applicant address: 1-7-12 Toranomon, Minato-ku, Tokyo Name:
(029) Oki Electric Industry Co., Ltd. Representative Nankai Hashimoto
, Yoka, 1 person, 4 agents 〒540 Pair of 5 amendments (1) Contents of 6 amendments in column ``Detailed Description of the Invention'' of the specification (1) ``200 to 300 cP'' on page 3, line 12 of the specification Correct J to 1'-200 to 3000CPJ.

that's all

Claims (1)

[Claims] 1. An ink ribbon in which the coloring agent of the liquid ink impregnated into the base fabric is an organic pigment.