JPH0712005Y2 - ink ribbon - Google Patents

Description

TECHNICAL FIELD The present invention relates to an ink ribbon used in various printers and typewriters.

2. Description of the Related Art Ink ribbons currently used are often made of polyamide fibers such as 6 nylon and 66 nylon as a base material from the viewpoint of printing durability, printing performance, printing quality, economy, etc. The constituent fibers of the warp and weft are 30
A plain weave in which fine woven fabrics such as denier, 40 denier and 70 denier are alternately woven one by one in the length and width is generally used.

In recent years, printers and the like have become faster, and along with this, the impact strength of the typed characters at the time of printing has increased.

However, when high-speed printing is performed with the ink ribbon, both ends of the ribbon are welded by an ultrasonic welder to break the endless ribbon, or the base fabric itself is severely damaged, and the ink contained in the ink ribbon is not enough. Although it remained, it could not be used.

For this reason, in order to increase the strength of the base fabric of the ribbon, one that increases the fabric density of the base fabric (the number of fabrics of the base fabric), for example, 40
Denier, 34 filament yarns with warp yarns from 170 / inch to 210 / inch and weft yarns from 115 / inch to 126 / inch are now commonly used. However, although these improve the strength of the base cloth, in the case of a cassette ribbon in which the ribbon is folded and stored in the cassette, the ink is intensively transferred to the folds of the ribbon, and this crease is generated during printing. There is a drawback that so-called high spots occur, in which only a portion has a high print density.

Further, when the density of the base cloth is further increased for the purpose of improving the strength of the base cloth, the ink content is lowered, so that the ink ribbon surface becomes sticky, the printing clarity is lowered, paper stains, high spots are increased. In addition, since the ribbon rigidity becomes too high, the cassette ribbon has various drawbacks such as reduced ribbon feed stability.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention is intended to improve the above-mentioned drawbacks, and even if the number of driven base fabrics is further increased to increase the base fabric strength, the ink content rate is significantly improved, and It is an object of the present invention to provide an ink ribbon in which the ribbon rigidity is not increased so that high spots are remarkably reduced and printing durability is remarkably improved, and at the same time, the flexibility of the ribbon is maintained and the ribbon feed is stabilized.

Means for Solving the Problems The present inventor has developed an ink ribbon by dissolving and kneading an ink ribbon in a base fabric made of polyamide fiber such as 6 nylon or 66 nylon, a dye, a pigment, a surfactant, and various oils. In the applied ink ribbon for impact dot printer, the fabric structure of the base fabric is twill weave, satin weave, or ridge weave, and the ink composition is 800 centipoise when the pigment is 5% or more and the ink viscosity is 20 ° C ( CPS) It was found that the above-mentioned object can be achieved in the above range, and the present invention was completed.

The twill weave in the present invention is as shown in FIGS.
2/2 twill, 2/2 twill twill, Turkish satin as shown in Fig. 3 for satin weave, and woven weave such as Panama as shown in Fig. 4 for rib weave. The print quality becomes more suitable when the fabric structure is made of Turkish Suzaku and Panama.

If the ink has a pigment content of 5% or more and an ink viscosity of 800 CPS (20 ° C.) or more, it can be suitably impregnated into a twill weave, satin weave, or ridge weave fabric base fabric, resulting in good printing durability. . When the pigment content is 5% or less and the ink viscosity is 800 centipoise or less, the fixability and affinity of the ink to the base fabric are deteriorated. Therefore, at the time of printing, the ink is ejected too much and the printing continuity is decreased, and at the same time, Ink easily migrates in the cloth, and high spots become more intense.

The present invention is not a plain weave in which the fabric structure is alternately woven one by one in the length and width as shown in FIG. Since it is an ink ribbon applied to a base weave fabric,
The ink content contained between the fibers is larger than that of the plain weave, and the flexibility is sufficiently maintained.
Even if the density of the fabric structure is further increased to increase the strength of the base fabric, the ink content is significantly improved and the flexibility is maintained compared to the plain weave type, so that the ink is less likely to concentrate at the folds. It becomes a ribbon.

Therefore, if this is used for a cassette ribbon, the high spots where the ink concentrates at the folds can be greatly improved, and the stickiness of the ribbon surface, the paper stains, the deterioration of the print sharpness, etc. are also greatly improved, and the printing durability is also greatly improved. Also, the stability of the ribbon feed can be maintained.

Examples Next, examples and comparative examples of the present invention will be described.

Example 1 Using 66 nylon thread with fiber densities as shown in Table 1.
2/2 twill twill weave base fabric is manufactured, and on this base fabric,
An ink as shown in Table 1 was applied to about 20 g / m ² to obtain an ink ribbon.

Examples 2 to 4 The base fabrics are Turkish satin, Panama, 2 /
Each of the ink ribbons was obtained by applying each ink shown in Table 1 to 2 twill. (Others are the same as in Example 1.) Comparative Example 1 A plain weave base fabric that is commonly used at present for high speed printing (dot pin diameter 0.2 to 0.24 m / mφ) is shown in Table 1. The ink shown was applied to 14 g / m ² to obtain an ink ribbon.
(Others are the same as those in Example 1.) Comparative Examples 2 to 4 The base fabrics were Turkish satin as shown in Table 1, and the inks shown in Table 1 were applied to the respective ink ribbons. . (Others are the same as in Example 1.) The CPS value of ink viscosity in Table 1 is assumed to be 20 ° C.

Comparative Tests The ink ribbons of Examples 1 to 4 and Comparative Examples 1 to 4 were printed on a high-speed dot line printer (wire dot pin 0.2 m).
/ mφ, printing speed 300 lines / min), and printing was performed, the high spots were almost inconspicuous in all Examples, while the high spots were clear in each Comparative Example. There has occurred.

In addition, Table 2 shows a comparative test of the durability of the printing density in printing by the printer. As is apparent from Table 2, the printing life of the ink ribbon of each example was about 1.3 to 1.9 times that of each comparative example. Macbeth PCM-II (filter A) was used as the measuring instrument, and PCS in Table 2 is the print contrast signal.

Effect of the Invention With the above-described configuration of the present invention, the ink ribbon for an impact dot printer that does not lower the ink content and maintains flexibility even if the fabric density of the base fabric is increased to increase the base fabric strength Becomes Therefore, the high spot is greatly improved, and the various effects such as the durability of the printing density, the stability of the ribbon feed, and the printing durability of the welded portion are enhanced.

[Brief description of drawings]

1 to 4 are enlarged plan views of respective base fabrics of respective embodiments of the present invention. FIG. 1 is a 2/2 twill as a twill weave, FIG. 2 is a 2/2 twill twill as a twill weave, Fig. 3 is a Turkish satin as a satin weave, Fig. 4 is a panama as a rib weave, and Fig. 5 is an enlarged plan view of a conventional plain weave base fabric. 1 ... the part where the weft floats, 2 ... the part where the warp floats.

Claims (1)

[Scope of utility model registration request] 1. An ink ribbon for an impact dot printer, comprising a base cloth made of polyamide fiber such as 6-nylon or 66-nylon and a dye, a pigment, a surfactant, and various oils dissolved and kneaded on the base cloth. The base fabric has a twill weave, satin weave, or ridge weave, and the ink has a pigment content of 5% or more and an ink viscosity of 800 CPS.
An ink ribbon characterized by having a temperature range of (20 ° C) or higher.