JP2569983B2 - Base fabric for ink ribbon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base fabric for an ink ribbon which is used in an impact type serial dot printer and has excellent print clarity and durability at a welded portion.

[0002]

2. Description of the Related Art Conventionally, a thin base fabric is generally used as a base fabric for an ink ribbon having excellent print clarity.
A relatively thin denier yarn of 0D or less, for example, 20D
Alternatively, 24D multifilaments are used for the warp and the weft, respectively, and in all cases, the same denier yarns are used for the warp and the weft, respectively.

In recent years, the number of conventional ink ribbons used in impact type printers has decreased, and a long tape-shaped ink ribbon is folded and stored in a cassette, and both ends of the ink ribbon are welded by an ultrasonic welder. (Adhesive) and endless cassette type are increasing.

[0004] Usually, the ink ribbon is impacted by the head pin of the printer when printing, and is gradually destroyed. However, the above-mentioned welded portion has lower durability than the ordinary base cloth portion, and the life of the welded portion is extended. It affected the life of the ink ribbon. Therefore, the durability of the welded part is one of the important characteristics. There is an inverse relationship between the durability of the welded portion and the thickness of the ink ribbon base fabric, and a thin base fabric using a fine denier yarn of 30 D or less has a significantly poor welded portion durability and cannot be put to practical use. is the current situation.

As a means for improving the durability of the welded portion of the thin base fabric, the relative viscosity of sulfuric acid of the polyamide polymer is adjusted to 3.0.
Japanese Patent Laid-Open No. 60-161184 and the like have proposed a technique of using a yarn having a higher strength, a higher draw ratio and a higher strength.

[0006]

However, when the relative viscosity of sulfuric acid is increased as in the above-mentioned prior art, not only the cost is increased, but also a yarn made of a polymer having a high relative viscosity of sulfuric acid is used in a stretching step of stretching at a high magnification. There are various problems such as thread breakage and deterioration of operability, and the present situation is that it has not reached a practical level.

An object of the present invention is to improve the productivity of yarn,
Another object of the present invention is to provide a base cloth for providing an ink ribbon having excellent durability of a base cloth welded portion and good print clarity.

[0008]

The present invention employs the following means in order to achieve the above object.

That is, the base fabric for an ink ribbon of the present invention comprises a woven fabric composed of synthetic filaments, and the denier of the warp constituting the woven fabric is 17 to 22D.
The denier of the weft is in the range of 27 to 33D, and the denier ratio of the weft to the warp is 1.2 to 2.0.
And at least one of the warp and the weft contains titanium oxide.
Synthetic fiber multifilament with a content of 0.1% by weight or less
In those characterized that you have been configured.

[0010]

The base fabric for ink ribbon of the present invention has been completed by investigating that the denier ratio of the weft to the warp constituting the woven fabric is related to the durability of the welded portion of the base fabric. .

That is, when a specific woven fabric having a high denier ratio is used as the base fabric for the ink ribbon as the weft to the warp constituting the woven fabric, surprisingly, the print clarity is improved, and It has been clarified that it is possible to provide a material having excellent durability at the welded portion of the cloth.

That is, the base fabric for an ink ribbon of the present invention uses a thick yarn having a denier ratio of the weft to the warp of 1.2 to 2.0 as the woven yarn constituting the woven fabric. . The ink ribbon made of such an ink ribbon base fabric has not only good print clarity but also excellent durability of the welded portion, and the relative viscosity of sulfuric acid of the polymer constituting the yarn is generally 2.5 to 3.0. The draw ratio may be an ordinary draw ratio, so that there is little trouble in the spinning process, the productivity is high, and a base fabric superior in cost can be provided.

The synthetic fibers referred to in the present invention include polyamide fibers, polyester fibers, polyacrylic fibers, polyvinyl fibers and the like. Polyamide fibers and polyester fibers having excellent performance in terms of the durability of the base fabric are provided. Fibers, particularly polyamide fibers, are preferred.

[0014] The denier of the warp yarn is preferably 22 denier (D) or less, and when it exceeds 22D, the durability of the base fabric is good, but the print clarity tends to decrease. However, the durability of the welded portion of the base fabric tends to be further deteriorated.

The denier of the weft is preferably 33D or less, and if it exceeds 33D, the durability of the base fabric is good, but the print clarity tends to decrease. If it is less than 27D, the print clarity becomes very good. However, there is a tendency that the durability of the welded portion of the base fabric is deteriorated.

The denier of the single fibers constituting the warp and the weft is preferably 1.0 to 3.0 denier (d) in order to form a thin fabric. When the single yarn tener is less than 1.0 d, the durability of the welded portion of the base fabric and the durability of the base fabric part tend to deteriorate, and when it exceeds 3.0 d, the print clarity tends to deteriorate. .

The number of twists of the warp and the weft is 200 to 500.
Twisting in T / M, preferably in the range of 250 to 400 T / M, is preferable because the weaving property or the ink life, which is the performance as an ink ribbon, is long, but is not particularly limited.

In recent years, the mainstream of ink ribbons used in impact type printers is a cassette type in which a long tape is folded and stored in a cassette.

When this cassette type ink ribbon is printed on a printer, a printed spot (graphic spot) occurs in which the bent portion is printed densely. Such a disadvantage is solved brilliantly. Moreover,
According to such a base cloth, the durability of the welded portion is also significantly improved.

Further, such an effect is particularly remarkably exhibited in a base fabric of a thin woven fabric having a thickness of 70 to 110 μ, which is formed of the above-described warp and weft denier woven yarns.

As the fabric structure of the base fabric for the ink ribbon, plain weave, guided plain weave, twill weave and satin weave are generally used, but are not limited to these.

The woven fabric preferably has a woven fabric density of 200 to 330 / in, more preferably 2 to 2,000.
It may be 40-280 yarns / in, and the weft is preferably 120
Book / in-170 book / in, more preferably 130-16
It may be about 0 / in.

The present invention has further clarified that the durability of the welded portion of the ink ribbon greatly varies depending on the content of titanium oxide in the filament yarn constituting the woven fabric.

That is, when the content of titanium oxide is 0 . 1 wt% or less, the good Mashiku it is necessary to configure the base fabric for an ink ribbon filament yarn is 0.05 wt% or less.
That is, by the this such content of titanium oxide is the durability of the welded portion of the ink ribbon is greatly improved
You can .

After the above-described woven fabric is woven, it is scoured by a usual method, preferably by liquid scouring, and then sieved with a pin tenter.
What is necessary is just to finish set in the range of 0 degreeC-200 degreeC.

According to the present invention, there is provided an ink ribbon base fabric comprising:
Further, an appropriate amount of ink material such as ordinary oil-based ink is applied to form an ink ribbon.

The base fabric for an ink ribbon of the present invention may have been subjected to appropriate post-processing such as high-pressure fluid processing, plasma processing, surfactant processing, and resin processing.

The ink ribbon constructed using the ink ribbon base fabric of the present invention thus obtained has not only good print clarity but also excellent durability of the welded portion of the base fabric, and furthermore, it is cost effective. Are also superior.

[0029]

The present invention will be described below in detail with reference to examples.

The evaluation method used in the present invention is as follows.

(Clearness of Print) The ink ribbon (13 m in length) prepared above was stored in a cassette for a 24-pin dot printer (UP-130K manufactured by Epson), and the cassette was set in the printer. Print alphabets, numbers, kanji, etc.,
The sharpness of the letters was evaluated with the naked eye.

(Evaluation Criteria of Sharpness) A: Very good sharpness O: Good sharpness Δ: Poor sharpness X: Extremely poor sharpness (Durability of welded portion of base cloth) The ribbon was cut once with scissors, and then welded portions were formed by an ultrasonic welder (M-8400 manufactured by Branson). Seven welded portions were provided at approximately equal intervals in an ink ribbon having a total length of 13 m, and endless. -Shaped ink ribbon was created.

24 pintot printer (Epson U
P-130K), the above-mentioned ink ribbon (length 13 m) is stored in the cassette, the cassette is set in the printer, alphabet and numbers are printed, and the number of prints when a pinhole occurs in the welded portion And read the average value as the durability of the welded portion of the base fabric.

◎: 1.5 million characters or more ○: 121-1.5 million characters ○-△: 101-1.2 million characters △: 81-1 million characters △-×: 61-800,000 characters ×: 600,000 characters or less Examples 1-6 , Comparative Example 1 ~ 7 17 denier / 17 filament, 20 denier / 17
Filament, 22 denier / 17 filament, 27
Denier / 26 filament, 30 denier / 26 filament, 33 denier / 26 filament, and 4
A 0 denier / 34 filament nylon 66 multifilament yarn (with a relative sulfuric acid viscosity of the yarn of approximately 2.85) was made.

For the multifilament used for the warp of the woven fabric, 40 denier yarn is 280 T / M, and for the other denier yarn, approximately 390 T / M is twisted. For the multifilament used for the weft, the twisting is performed. Instead, a woven fabric having a plain weave structure was prepared.

These woven fabrics are scoured by a usual method,
Finish setting was performed to produce the fabric shown in Table 1.

These woven fabrics were blown to a width of 13 mm to prepare a base fabric for an ink ribbon. For the weight of the base cloth,
An oil-based ink was applied at 24% by weight to prepare an ink ribbon for a dot printer.

With respect to these ink ribbons, print clarity and durability of the welded portion were measured.

Table 1 shows the results.

[0040]

[Table 1] As is clear from Table 1, those of Examples 1 to 6 had a thin base fabric and good print clarity, and also had good durability of the welded portion and were on a practical level.

Comparative Example 7 is a base fabric for an ink ribbon that is commonly used. Although the durability of the welded portion is at an extremely good level, the print clarity is poor and the practical level is poor. .

In Comparative Examples 1 to 4 , the print clarity was extremely good, but the durability of the welded portion was poor, and it was not practical.

In Comparative Examples 5 to 7, the print clarity was poor, and
It was not a typical thing.

[0044]

The base fabric for an ink ribbon of the present invention has very good print clarity, and the yarn constituting the base fabric has a relative sulfuric acid viscosity of 2.8 to 2.9 which is generally used. In addition, it is possible to provide an ink ribbon suitable for a high-speed printer in which the welding portion has good durability and the thickness of the base cloth is small.

Claims (4)

(57) [Claims] 1. A woven fabric comprising a multifilament synthetic fiber, wherein the denier of the warp constituting the woven fabric is 17 to
22D, the denier of the weft is in the range of 27-33D, and the denier ratio of the weft to the warp is 1.2-2.
0 der is, at least one of the warp and weft, titanium oxide
Synthetic fiber multifiller with tan content of 0.1% by weight or less
Ink ribbon for the base fabric which is characterized that you have is composed of the instrument. 2. The base fabric for an ink ribbon according to claim 1, wherein the fabric is a thin fabric having a thickness of 70 to 110 μm. 3. The warp and the weft are made of a single fiber denier 1.
2. The base fabric for an ink ribbon according to claim 1, which is 0d or more. 4. The ink ribbon base fabric according to claim 1, wherein the warp and the weft are nylon filaments.