JPH0223615B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention has extremely excellent dustproof properties and antistatic effects suitable as a fabric for dustproof clothing. This invention relates to a clothing material mixed with conductive fibers. [Prior Art] Conventionally, in work environments such as semiconductor manufacturing and biochemical industries, that is, in clean rooms, workers wear dust-proof work clothes to prevent dust from being generated from the human body. However, semiconductor devices have recently entered the era of VLSI, and not only floating particles (fine particles) in clean room spaces, but also ultrafine particles of 1 μm or less such as dust and bacteria generated from workers' bodies or underwear are becoming a problem. It has reached the point where
However, the current situation is that a fully satisfactory solution has not been found. On the other hand, in order to semi-permanently impart high-performance antistatic properties to fabrics for dust-proof work clothes, conductive threads are mixed into the fabrics. However, conventional fabrics mixed with conductive threads are created by mixing conductive threads alone or by blending or twisting with other materials, or by covering, but the mixing rate of conductive threads is only a percentage of the total weight of the fabric. However, since the conductive yarn is partially used, its properties are different from those of the yarn constituting the main base, which causes various problems in the fabric-making process and fabric performance. In other words, when a conductive yarn is mixed alone, there is a large difference in raw yarn properties such as elongation, Young's modulus, fineness (denier), etc. from the base yarn, and special consideration is required in the fabric-making process. Moreover, even after fabrication, defects such as puckering may occur due to potential tension differences. In the case of blended yarn, it is not only inherently undesirable for use in dust-proof clothing because it is a short fiber, but also because filaments are used as the yarn that makes up the base part from the perspective of preventing dust generation from itself. The difference in the form and properties of the yarn is too large, making it unsuitable. On the other hand, in the case of mixing conductive yarns by intertwisting or covering method, if the yarns constituting the base part are mixed with the same material, the difference in properties between the yarns constituting the base part can be relatively small; Since the threads are entangled in a shape, a gap is created between the threads making up the base part and the dust-proofing effect is reduced. [Problems to be Solved by the Invention] The purpose of the present invention is to improve the above-mentioned drawbacks, and to streamline the fabric manufacturing process, and to provide a mixture of conductive fibers with excellent dustproof properties and improved moisture permeability. Let,
To provide a fabric suitable as a dustproof fabric. [Means for solving the problem] The clothing material for dust-proof clothing according to the present invention is a mixed fiber yarn containing conductive yarn, and has a fineness that does not contain conductive yarn.
It is made by knitting and weaving mixed yarns with a difference in apparent diameter of 20 to 200 deniers and the difference in apparent diameter between adjacent yarns making up the base is within 10%, and the air permeability is 8 c.c./cm ² /sec or less. Features. The yarn constituting the base of the clothing material of the present invention is not particularly limited, but from the viewpoint of dust generation, it is preferably a filament made of synthetic fiber. Generally, raw yarn, false twisted yarn, or other secondary yarn with a single fiber fineness of 0.1 to 5 deniers and a total fiber count of 20 to 200 deniers is used. On the other hand, conductive threads are not particularly limited,
Commonly used filament yarns such as metal fibers, metal-plated fibers, and carbon fibers are used. Normally, single yarn fineness is 1 to 50 denier, total fineness is 10 to 100.
Denier ones are used. The yarn mixed with conductive yarn used in the present invention has a difference (absolute value) in apparent diameter with respect to an adjacent ground component yarn that does not contain conductive yarn within 10%, preferably within 5%. In this way, by making the thickness of the mixed yarn the same as that of the adjacent base component yarn, it is possible to make the gaps between the fibers and the irregularities on the surface of the fabric extremely small. Here, the difference (%) in apparent diameter is calculated by the following formula. Difference in apparent diameter = Apparent diameter of base component yarn - Apparent diameter of conductive yarn mixed yarn / Apparent diameter of base component yarn x 100 The apparent diameter is calculated from a theoretical value. As a method for blending the conductive yarns, a method may be adopted in which the conductive yarn and the fiber-mixing partner are aligned approximately parallel to the yarn axis direction and subjected to fluid jet processing or twisting.
By using these methods alone or in combination, it is possible to obtain a mixed fiber yarn in a composite form in which the fibers are blended and converged and are integrated. Among these methods, in fluid injection processing, when the conductive yarn and the mixed material are aligned, jetted, and intertwined, it is possible to complete the creation of the mixed fiber yarn in one step.
In processing where only twisting is applied, it is preferable to align the materials to be mixed in advance because this improves the fiber mixing properties. The fluid jet processing can be performed by feeding the conductive yarn and the material to be mixed into an interlace processing nozzle or a taslan processing nozzle. When using an interlacing nozzle, it is preferable to overfeed the conductive yarn by 1 to 2% with respect to the fiber to be mixed, and to intertwine the fibers at a rate of 20 to 100 times/M. When using a Taslan processing nozzle, it is preferable to overfeed the conductive yarn by 4 to 8% to provide convergence as a whole. On the other hand, in the pulling/twisting method, it is only necessary to apply the minimum number of twists necessary for the mixed yarn to converge.
Usually 100T/M to 300T/M is sufficient. Among the above-mentioned mixing methods, the fluid jet mixing method is preferable, and interlace mixing is the most practically effective. It is preferable that the properties of the mixed yarn and the adjacent base component yarn are similar to each other, and therefore, the same material as the base component yarn is used as the partner fiber to be mixed with the conductive yarn, and this material It is preferable that the mixed fiber ratio is 30% or more. A more preferable blending ratio is 50%
or more, most preferably 70% or more. Regarding the thickness of the mixed yarn, for the reasons mentioned above and from the perspective of imparting smoothness to the fabric surface, the difference in apparent diameter between the mixed yarn and the adjacent ground component yarn is 10.
% or less, preferably 5% or less. The proportion of the mixed fiber yarn is preferably 0.5 to 10% by weight based on the weight of the fabric. The method of mixing, knitting, and weaving the mixed fiber yarns is not limited, and the mixed fiber yarns are arranged and knitted or woven with an appropriate density and texture using a conventional method. In particular, in order to achieve a high degree of dust resistance, the gap between the mixed yarn and the adjacent yarn that makes up the base must be small, and the airflow rate of the interwoven material must be 8 c.c./cm ² /
Must be less than or equal to sec. Such a low air permeability can be easily obtained by appropriately selecting the weaving density, structure, proportion of mixed yarn used, content of conductive yarn in the mixed yarn, processing conditions after knitting and weaving, etc. can. [Effects of the Invention] The clothing material of the present invention has the following features. (1) Mixed yarns have the same composition and thickness as the base part, so they are very similar in appearance and properties to the base yarns (in particular, blended yarns made of the same material as the base part yarns) In weaving,
There is no need to weave using two beams as in the past, and weaving can be performed without any problems with one beam, resulting in cost rationalization. Further, the conductive yarn is uniformly mixed with the material that makes up the base. (2) The gap between the mixed fiber yarn and the adjacent yarns constituting the base is small, and the irregularities on the surface of the fabric are extremely small. Therefore, compared to conventional fabrics, the dust permeability is lower and the dust-proofing effect is better. On the other hand, there is little difference in potential tension between the yarn and the base thread, and there is no occurrence of puckering due to ironing during sewing. (3) Since the conductive yarn is dispersed and mixed as a mixed yarn,
It promotes the corona discharge effect of charged static electricity and improves the antistatic effect. As described above, the material for dustproof clothing according to the present invention exhibits excellent processability, dustproofness, and antistatic properties. [Example] Hereinafter, the clothing material of the present invention will be specifically described with reference to Examples. In the examples, moisture permeability and frictional charging voltage are each
JISZ-0208 and JISL-1094 (temperature 20℃, humidity 50
%). In addition, the air permeability is JIS-L-1097
(Based on the Frazier method). On the other hand, the dustproof rate was determined using a dust measuring device (light scattering type dust counter) using the following formula. (n=10)
The particle size of the dust measured was 0.3 to 0.5μ.
It is m. Dustproof rate = (1 - number of dust that passed through the sample fabric / number of original dust in the sample air) × 100% Example 1 As the warp, polyester filament 75d/
36f (apparent diameter 877 μm), interlaced mixed fiber yarn of polyester filament 50d/24f and conductive thread 20d/3f (carbon kneaded type polyamide fiber) (fluid jet mixed yarn using an interlacing nozzle) (apparent diameter 837 μm).
and are arranged at a ratio of 27:1, and as wefts,
Polyester false twisted yarn (2 heater type)
Using 75d/36f, ₃ -- ₁ → Twill, WJL
(450 r.pm) with a warp density of 120 threads/inch and a weft density of 107 threads/inch, and a normal dyeing finish was performed. The performance of the obtained fabric is shown in Table 1. Example 2 As an example, as warp threads, polyester filament 75d/36f (apparent diameter 877 μm), polyester filament 50d/24f, and conductive thread 20d/3f were used.
(carbon kneaded type, polyamide fiber), aligned and twisted (s250 T/M) blended yarn (apparent diameter
964 μm) were arranged in a ratio of 27:1, and weaving and finishing were carried out in the same manner as in Example 1 using polyester processed yarn (2 heaters) 75d/36f as the weft. The performance of the obtained fabric is shown in Table 1. Comparative Example 1 As a comparative example, polyester filament 75d/36f (apparent diameter 877 μm) was used as the warp, and intertwisted yarn (s580 T/M) of polyester filament 50d/24f and conductive thread 20d/3f (carbon kneaded type, polyamide fiber) was used. ) (apparent diameter 1099μm) and 27:1
Using a polyester processed yarn (2 heaters) 75d/36f for the weft, the intertwisted yarn and the constituent yarn of the base are each ₃ -- ₁ → twill on a rapier loom (150 rpm). Supplied with separate beam, warp density 120
Woven at a weft density of 107 threads/inch. next,
A conventional dye finish was carried out as in Examples 1 and 2. The performance of the obtained fabric is shown in Table 1.

【table】

[Table] Comparative Example 2 In Example 1, weaving was performed with the weft density reduced by 7 threads/inch, and the same dyeing finishing was performed. The performance of the obtained fabric is shown in Table 2. The decrease in fabric density increased the air permeability and decreased the dustproof rate. Comparative Example 3 In Example 1, polyester filament 50d/24f and conductive yarn 20d/24f were used as the warp and weft.
3f (carbon kneaded type polyamide fiber)
Using interlace and blended yarn, the dyeing and finishing were done using the same weaving standards. The performance of the obtained fabric is shown in Table 2. As can be seen in the table, the blended yarn used is a so-called different shrinkage blended yarn in which the boiling water shrinkage rates of the two types of yarn are different, so the yarn form of the finished fabric becomes bulky yarn, both within the yarn and between the yarns. The air flow rate increased, the air permeability increased, and the dustproof rate decreased.

【table】

[Table] As is clear from the above examples and comparative examples,
The fabric of the present invention has a good dustproof effect, and
It has good packing and anti-static effects, and the fabric manufacturing process can be done with a single beam WJL, reducing costs and streamlining the process.

Claims (1)

[Claims] 1. In a fabric made by mixing and weaving conductive yarns, the difference in apparent diameter between adjacent ground component yarns that are mixed fiber yarns that contain conductive yarns and have a fineness of 20 to 200 deniers that do not contain conductive yarns. Garment material for dust-proof clothing, which is made by knitting and weaving using blended yarns with a content of less than 10%, and has an air permeability of 8 c.c./cm ² /sec or less.