JPH0639186B2 - ink ribbon - Google Patents

Description

The present invention relates to an ink ribbon used in a printing device such as a dot printer or a belt type printer, and more specifically, to wear a type member of a terminal of the printing device. The present invention relates to an ink ribbon which can be remarkably reduced.

[Conventional technology]

Recently, various printing devices such as dot printers and belt type printers have been developed which can be connected to a computer terminal and can print continuously for a long time. Usually, tungsten or chromium plating or nickel plating on the surface is used as the printing member. Used iron and stainless steel are used.

[Problems to be solved by the invention]

However, in this kind of printing member, the printing surface is easily worn due to continuous operation for a long time,
There is a drawback in that the obtained printed image becomes extremely unclear. For example, in the case of a dot printer using a printing member made of tungsten, the printing member wears about 1 mm from the tip after about 1000 hours of continuous operation. Also, in the case of a belt printer that uses an iron printing member whose surface is chrome-plated, the chrome-plated bald flakes and the exposed iron corrodes due to wear due to long-term operation, and usually 10 million line prints are printed. However, there is a drawback that the printing member must be replaced.

As a result of various studies on the cause of the problem, the present inventor has found that the main component is the component of the ink that is impregnated or applied to the ink ribbon used in this type of printing apparatus.

The ink that is impregnated or applied to this kind of ink ribbon is prepared by adding carbon black and an oil-soluble dye as a colorant together with a dispersant to oils, which are usually vehicles, and kneading them uniformly. However, when printing is performed using an ink ribbon that is impregnated or coated with an ink consisting of this component, the one that uses carbon black in combination has a higher print density than the one that uses only oil-soluble dyes, and print quality without blurring. You can make good things,
It has been confirmed that the printed image after continuous printing becomes extremely unclear compared to the initial printed image because of its high hardness and secondary aggregation.

[Means for solving problems]

Therefore, as a result of further research by the present inventor, the ink ribbon obtained by making the ink ribbon impregnated or applied to the ink ribbon used in this type of printing device have a special drawback However, the present invention has been completed by discovering the fact that it exerts an excellent effect that the wear of various printing members can be remarkably reduced.

That is, the ink ribbon of the present invention is characterized by using a dye and a nigrosine lake pigment as a colorant in the ink impregnated or applied thereto.

In particular, the nigrosine lake pigment is most preferably contained in the ink in the range of 2 to 20 weight percent, and the particle size of the nigrosine lake pigment is most preferably 5 μm or less.

In addition, the ink used in the present invention, a dye that is a colorant and a nigrosine lake pigment are added to a vehicle oils together with a predetermined amount of a dispersant, and prepared by uniformly kneading with, for example, a three-roll mill, and thereby obtained. The ink ribbon of the present invention can be obtained by impregnating or applying the obtained ink on the ink ribbon base.

As the ink ribbon material, it is possible to use materials that are commonly used as this material, for example, cotton, silk, nylon and the like.

Further, as the oils and dispersants, the respective constituent components that are conventionally used in the production of ink ribbons of this type can be used as they are. Among them, as oils,
For example, mineral oil, animal / vegetable oil, etc. can be mentioned.

[Work]

An ink ribbon impregnated or coated with a dye and a nigrosine lake pigment as a colorant in an ink containing oils, a colorant, and a dispersant as a main component,
An extremely excellent lubricating effect is exhibited by the synergistic action of the lubricity of oils such as mineral oil, animal / vegetable oil and the like, which are usually contained in ink as a vehicle, and the lubricity of the above dyes and nigrosine lake pigments. That is, both the dye as a colorant and the nigrosine lake pigment have the property that the cleavage between adjacent thin films is likely to be displaced due to a slight external force due to their compositional structure, and that the dispersibility is good, and therefore both are extremely excellent. In addition, the lubrication effect and the lubricity of the oils contained in the ink synergistically exert an excellent lubrication effect.

Incidentally, the nigrosine lake pigment is preferably contained in the ink in the range of 2 to 20% by weight, because the ink fluidity becomes worse when the addition amount of the nigrosine lake pigment is larger than the above range, and On the contrary, if it becomes smaller, the lubricity of the ink is lowered. on the other hand,
The particle size of the nigrosine lake pigment is preferably in the range of 5 μ or less and 0.5 μ or more because the lubricating effect is reduced when the particle size is larger than the above range, and concealed when the particle size is smaller. Because the power is inferior.

〔The invention's effect〕

The ink ribbon according to the present invention exerts an extremely excellent lubricating function by the synergistic effect of the lubricity of the oils contained in the ink and the lubricity of the dye and the nigrosine lake pigment, resulting in printing. The wear of the member is reduced, so that the life of the member can be extended. Therefore, the sharpness of the printed image can be maintained for a long time.

〔Example〕

Examples and comparative examples of the present invention will be given below, but the present invention is not limited thereto.

Example Oils (mineral oil) 30 parts by weight Colorant (nigrosin lake pigment) 10 〃 〃 (oil-soluble dye) 20 〃 Oils (fatty acid ester) 40 〃 Total 100 〃 After uniform kneading with a three-roll mill, A black ink ribbon was obtained by applying it to an ink ribbon base made of Nanron.

When this ink ribbon was continuously printed with a dot printer for 1000 hours and the initial printed image and the printed image after 1000 hours of continuous printing were compared, there was no change.

Comparative Example Oils (mineral oil) 30 parts by weight Colorant (carbon black) 15 〃 〃 (oil-soluble dye) 15 〃 Oils (fatty acid ester) 40 〃 100 〃 in the same manner as in the example The same ink ribbon base as in the case of the example was applied to obtain a black ink ribbon.

Print this ink ribbon in the same way as in the example,
When the initial printed image and the printed image after 1000 hours of continuous printing were compared, the printed image after 1000 hours of continuous printing was extremely unclear.

Claims (3)

[Claims] 1. An ink ribbon impregnated or coated with an ink containing oils, a colorant and a dispersant as a main component, wherein the colorant comprises a dye and a nigrosine lake pigment. 2. Nigrosine lake pigment is contained in the ink in an amount of 2 to 20.
The ink ribbon according to claim 1, which is contained in a weight percentage. 3. The ink ribbon according to claim 1, wherein the nigrosine lake pigment has a particle size of 5 μm or less.