JPH0764108B2 - Ink ribbon fabric - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention provides an excellent ink life,
The present invention relates to a fabric for an ink ribbon, which has printing uniformity, fine expression, and sharpness.

[0002]

2. Description of the Related Art Conventionally, typewriters and registers using ink ribbons have been widely used, but in recent years, due to the remarkable development and popularization of computers, many printers using ink ribbons have been used. It was These are methods in which an ink ribbon and a print paper are polymerized to apply a shock pressure to transfer the ink to the paper, and the transfer method is roughly classified into a type method and a dot matrix method.

The former is a large model as a high-speed printer,
The latter is mainly used for small models for terminals, but with the remarkable spread of word processors and personal computers in recent years, the dot matrix method has been widely adopted.

The number of dots composing the matrix is changed from the conventional 5 × 7 dots to 9 × 9 dots, and further to 24 × 24 dots, which enables finer expression and is clear. Is changing to.

Further, the ink ribbon can be roughly classified into two types, that is, a spool type and a cassette type in which the ink ribbon is folded and stored in a cassette. Especially, in the latter case, the bent portion is darkly printed and becomes a so-called graphic spot. There was a problem that occurs.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fabric for an ink ribbon which has excellent ink absorbency, enables clear and fine expression, and does not generate graphic spots.

[0007]

In order to solve the above problems, the ink ribbon fabric of the present invention has the following constitution.
That is, the ink ribbon for fabric formed by mainly composed of thermoplastic synthetic fibers, characterized in that the array of filaments in the yarn constituting the fabric is disturbed impactor
This is a fabric for ink ribbons for totype printers .

The present invention will be described in more detail below. Examples of the thermoplastic synthetic fibers constituting the ink ribbon fabric of the present invention include polyester fibers, polyamide fibers, polyacrylonitrile fibers, polyolefin fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, acetate fibers and the like. Among them, polymer fibers having a high mechanical resistance to typed characters, such as polyamide fibers and polyester fibers, are preferable. Polyamide fiber is particularly preferable.

The woven fabric for the ink ribbon of the present invention is made of a woven fabric in which the above fiber is used for either the warp yarn or the weft yarn, or both the warp yarn and the weft yarn. These yarns generally have a total fineness of 20-100 denier,
It is preferably composed of 30-70 denier multifilament yarn. The single fiber fineness of the multifilament yarn is generally 1 to 5 denier, preferably 1 to 3 denier. Such an ink ribbon fabric generally has a warp yarn density of 150 to 220 threads / 2.54c.
A plain weave having a m and weft thread density of 100 to 150 threads / 2.54 cm is applied, but it is not necessary to limit to this and a thread density or weave design other than the above may be used.

The ink ribbon fabric of the present invention is characterized in that the arrangement of the single fibers in the yarns constituting the fabric is disordered. In the present invention, the fact that the arrangement of the monofilaments in the yarns constituting the woven fabric is disturbed means that a part of the monofilaments constituting one yarn moves and the fibers are opened or entangled to form It is a state where voids are created between the yarns, and it is not necessary for all the yarns that make up the fabric to have the disordered arrangement of the monofilaments, and the warp and weft yarns that are present in the fabric It suffices if the above condition is satisfied for at least half of the intersections of the above.

The woven fabric for an ink ribbon of the present invention having such a structure can be obtained by treating the woven fabric with a high-pressure fluid. The high-pressure fluid treatment in the present invention is a method in which a liquid or a gas is made to flow under pressure and the fluid is collided with a fabric to be treated. Examples of fluids applied to such a system include water, organic solvents, air, and water vapor. These fluids are mixed with fine particles of glass, metal, ceramics, plastics, or the like. You can use it. Among such fluids,
From the viewpoint of workability, cost, impact energy amount, treatment efficiency, etc., liquid, particularly water is preferable. Among such liquids are other ingredients such as organic solvents, carriers, acids,
It does not matter even if an alkali, a surfactant, a leveling agent, a resin or the like is emulsified, dispersed or dissolved.

For example, when treating with water, the amount of water is 10 to 300 kg / cm ² , preferably ²⁰ to 100 kg / cm ² .
A pressure of cm ² is applied and the high pressure water is ejected from the nozzle to impinge this high velocity water stream on the fabric. If the pressure is too low, the effect of moving the position of the yarn in the woven fabric is not sufficiently exhibited, while if the pressure is too high, the yarn arrangement is greatly disturbed, which is not preferable. The diameter of the nozzle that ejects water is 50
.About.700 .mu., Preferably about 100 to 300 .mu., Is selected from the viewpoint of efficient treatment effect.

The distance between the nozzle and the fabric is arbitrary, but a distance of about 3 to 50 cm is usually suitable. That is, if the distance is too close, a columnar flow having a diameter substantially equal to the nozzle diameter is obtained, the flow velocity is the fastest and the impact force is large, but the untreated portion generated between the nozzles becomes too large. On the contrary, if the distance between the nozzle and the fabric is too large, the jetted water becomes granular due to the surface tension and the flow velocity becomes slow due to the air resistance.

In carrying out such a high-pressure water stream treatment, it is most preferable that the woven fabric is placed on a water-permeable belt conveyor such as a wire net and the woven fabric is moved while the treatment is performed. At this time, it is preferable from the viewpoint of improving the uniformity of the surface of the woven fabric that the nozzle is swung in the fabric traveling direction or in the direction perpendicular to the traveling direction so that the jetted water collides with the entire surface of the fabric. Although the temperature of the water stream is not particularly limited, it is usual to select a condition from room temperature to about 100 ° C.

The fluid treatment for obtaining the ink ribbon fabric of the present invention may be carried out at any stage of the process such as desizing and scouring, washing, drying and setting of the woven fabric. Or after that is preferable from the viewpoint of work efficiency.

The width and thickness of the woven fabric may change due to the above-mentioned fluid treatment, but in order to prevent these, it may be adjusted by performing a set treatment such as dry heat setting or calendering.

The ink ribbon is 1 m ^{2 of} ink obtained by blending the ink ribbon fabric with a coloring agent such as an organic or inorganic dye or pigment in an organic solvent or water.
Apply 10 to 30g per piece, cut into a predetermined width and length,
The ink ribbon is loaded on a predetermined reel, spool, or case.

[0018]

According to the present invention, the high pressure fluid treatment moderately disturbs the arrangement of the single fibers in the yarns of the fabric to increase the voids inside the fabric, and as a result, the resulting ink ribbon fabric has an ink absorptivity. In addition to the improvement, it is possible to prevent the occurrence of graphic spots.

[0019]

[Evaluation Method] The evaluation method of the ink ribbon fabric used in the present invention is as follows.

<Ink absorption amount> A 10 cm square test piece is formed by fusing the ink ribbon fabric, and the test piece weight A (g) is weighed. This test piece is dipped in an oily black ink (manufactured by Sakata Inx Co., Ltd.) and then defoamed under a reduced pressure of 70 mmHg to sufficiently permeate the oily ink into the test piece. After removing the test piece from the oil-based ink and removing the oil-based ink on the surface of the test piece with a glass rod, a square filter paper (No. 2, 60 cm x 60 cm,
Test piece weight B after the operation of removing excess oily ink through the mangle by sandwiching it between Tokyo Paper Co., Ltd. 3 times
Weigh (g). The difference between these weight measurements B and A is 1
The value obtained by multiplying by 00 is taken as the ink absorption amount (g / m ² ).

<Graphic spots> 9 pin dot printer M-1541 (made by Tokyo Electric Co., Ltd.)
A 13 mm, 10 m long base cloth is dipped in oil-based black ink (produced by Sakata Inx Co., Ltd.) to store an ink ribbon sample with a predetermined oil-based ink content, then set in the same printer and solid printing is performed. Then, the generation state of the graphic spots is visually evaluated. The judgment criteria are the following five levels.

⊚: a state in which no spots occur at all ○: a state in which spots hardly occur Δ: a state in which spots are thin x: a state in which spots are intense XX: a state in which spots are very dense

[0023]

【Example】

(Example 1, Comparative Example 1) 40 denier, 34 filament nylon 6.6 filament yarn is glued into warp yarns, and three yarns are passed through each feather of a 20.6 reed / cm reed and laid on a water jet loom. A 70 denier, 34 filament nylon 6.6 filament yarn was used as the weft, and the warp density was 164 yarns / 2.54 cm and the weft density was 1
A plain weave of 07 / 2.54 cm was woven.

This woven fabric was dipped in a treatment liquid containing caustic soda and a surfactant at 95 ° C. to remove desizing, scoured, washed with hot water, and then dried with a cylinder dryer. Next, this woven fabric was subjected to a high-pressure water stream treatment under the following conditions, dried with a cylinder drier, and then subjected to dry heat setting so as to have the same width as before treatment. <High-pressure water flow treatment conditions> Water pressure: 50 kg / cm ² Nozzle diameter: 0.13 mmφ Nozzle interval: 0.6 mm Distance between nozzle and object to be treated: 6 cm Treatment speed: 1 m / min Nozzle swing: Amplitude 1.2 mm in width direction The fabric after the treatment at 5 times / sec. Had an extremely uniform surface and was suitable as a fabric for an ink ribbon (Example 1).

The same fabric as in Example 1 was washed with hot water, dried with a cylinder dryer, and then subjected to only dry heat setting without being subjected to a high-pressure water stream treatment to obtain Comparative Example 1.

The evaluation results of these ink ribbon fabrics are shown in Table 1. In addition, the oil-based ink content rate when evaluating the graphic unevenness was set to 24.5%. From Table 1,
It can be seen that the ink of Example 1 is superior to the ink of Comparative Example 1 in that the ink absorbency is excellent and no graphic unevenness occurs.

[0027]

[Table 1]

(Examples 2 to 4, Comparative Example 2) Nylon 6.6 filament yarn of 40 denier and 34 filaments was used for both warp and weft, and the warp was glued to each reed of 20.9 / cm. Pass three by three and hang on water jet loom, warp density 162 threads /2.54 cm, weft density 1
A plain weave of 05 pieces / 2.54 cm was woven. This woven fabric was desized under the same conditions as in Example 1, scoured, washed with hot water, and then
Dried. Next, this woven fabric was subjected to a high-pressure water stream treatment under the following conditions, dried with a cylinder dryer, and then subjected to dry heat setting so as to have the same width as before treatment (Example 2).
~ 4).

<High-pressure water stream treatment conditions> Water pressure: 30 to 50 kg / cm ² Nozzle diameter: 0.2 mm φ Nozzle interval: 0.35 mm Distance between nozzle and object to be treated: 6 cm Treatment speed: 50 m / min Nozzle swing: None The same fabrics as in Examples 2 to 4 were washed with hot water, dried with a cylinder dryer, and then subjected to no high-pressure water stream treatment.
Comparative Example 2 was prepared by applying only a dry heat set.

Table 2 shows the evaluation results of these ink ribbon fabrics. In addition, the oil-based ink content rate when evaluating the graphic unevenness was set to 24.5%. From Table 2,
In comparison with Comparative Example 2, Examples 2 to 4 have excellent ink absorbency,
It can be seen that there are no graphic spots.

[0031]

[Table 2]

(Examples 5 to 9 and Comparative Example 3) 40 denier, 34 filament nylon 6.6 filament yarn was used for both warp and weft, and the warp was pasted to each reed of 25.3 / cm. Pass through 3 yarns each and hang on water jet loom, warp density 205 yarns / 2.54cm, weft density 1
18 plain cloths / 2.54 cm were woven. This woven fabric was desized under the same conditions as in Example 1, scoured, washed with hot water, and then
Dried. Next, this woven fabric was subjected to a high-pressure water stream treatment under the following conditions, dried with a cylinder dryer, and then subjected to dry heat setting so as to have the same width as that before treatment (Example 5).
~ 9). <High-pressure water flow treatment conditions> Water pressure: 60 to 100 kg / cm ² Nozzle diameter: 0.2 mm φ Distance between nozzle and object to be treated: 6 cm Nozzle interval: 0.35 mm Treatment speed: 50 m / min Nozzle swing: None After washing the same fabric as 5-9 with hot water and drying with a cylinder dryer, without high pressure water treatment,
Comparative Example 3 was prepared by applying only a dry heat set.

Table 3 shows the evaluation results of these ink ribbon fabrics. In addition, the oil-based ink content rate when evaluating the graphic unevenness was set to 21.0%.

From Table 3, it can be seen that Examples 5 to 9 are superior in ink absorbency to Comparative Example 3 and have no graphic unevenness.

[0035]

[Table 3]

[0036]

According to the present invention, ink absorption is excellent,
It is possible to provide a woven fabric for an ink ribbon, which enables clear and fine expression and does not generate graphic spots.

Claims (1)

[Claims] 1. A thermoplastic ink ribbon for fabrics comprising mainly constituted of synthetic fibers, characterized in that the array of filaments in the yarn constituting the fabric is disturbed Inpa
Ink ribbon fabric for EC type printers .