JP2825582B2 - Dust-free clothing fabric - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a woven fabric for dust-free clothing. In particular, it relates to a dust-free garment fabric suitable for use in a clean room.

[Related Art] In recent years, in the electronics field, particularly in a clean room or the like for manufacturing a semiconductor with a high degree of integration, a high degree of cleanliness in the room is required in proportion to the level of the degree of integration. In order to maintain a clean room with high cleanliness, dust generated by workers working in the room must be prevented. Dust generated by the worker is, to one, material dust generated from the outer garment worn by the worker, and
Dust generated from the worker's body itself and the underwear worn by the worker and transmitted through the outer garment material, and three types of transmitted dust are the worker's body and the underwear worn by the worker. And the like, and there are three types of dust that leaks from clothing openings (cuffs, hem mouth, neck, face, etc.).

Conventionally, synthetic fiber filament yarns having a small number of free ends of fibers have been used in many cases for dust-free clothing in order to prevent dusting of the material. ing.

However, the aforementioned transmitted dust and leaked dust are not at a sufficient level. For example, attempts have been made to use high-density fabrics or coated fabrics to reduce the transmitted dust. Certainly, such high-density woven fabrics and the like have low air permeability, and thus can prevent transmission dust. However, when clothes made of such low air-permeable fabrics are worn, they have a disadvantage of increasing leakage dust. Furthermore, the clothes made of the low-permeability cloth are difficult for workers to release moisture generated during wearing out of the clothes, and not only increase the discomfort of wearing, but also the texture of the high-density woven fabric is paper. The feeling of wearing was poor, as it was hard and sloppy.

[Object of the Invention] An object of the present invention is to solve the above-mentioned conventional drawbacks and to propose a woven fabric which is excellent in dustproofness and enables a dust-free garment excellent in wearing feeling.

[Constitution of the Invention] The present invention relates to a mixed fiber comprising a fine denier polyester multifilament yarn having a single fiber denier of less than 1.0 de as a warp and a thick denier polyester multifilament yarn having a single fiber denier in a range of 1.0 to 3.0 de. A woven fabric comprising a polyester crimped yarn having a single fiber denier of less than 3.0 de as a weft, wherein the mixed fiber is a yarn in which the fine denier polyester multifilament yarn is larger than the thick denier polyester multifilament yarn. And the yarn length difference is in the range of 1 to 10% based on the thick denier polyester multifilament yarn, and the fine denier polyester multifilament yarn is disposed mainly in the outer layer of the mixed fiber. The warp yarn and the weft yarn are woven in an oblique weave in which the number of floats does not exceed three in a row. Is, the fabric was filled satisfy the 90~140m / cm ²該経yarn and weft in terms fiber length per unit surface area, the air permeability of the fabric material satisfies 3~20cc / cm ² / sec This is a woven fabric for dust-free clothing.

The mixed fiber used in the present invention is manufactured by a known method such as an electrospreading method, a method of splitting by spreading a fluid, and a method of turbulent jet of a fluid. Considering this, the one obtained by the interlace processing is most preferably used.

As the mixed fiber, a fine denier polyester multifilament yarn having a single fiber denier of less than 1.0 de is used, and preferably, the single fiber denier is in a range of 0.01 to 0.5 de. Further, the fine denier polyester multifilament yarn of the mixed fiber has a yarn length larger than that of the thick denier polyester multifilament yarn, and the yarn length difference is 1
Such a yarn length difference is obtained by giving a difference in boiling water shrinkage ratio to a fine denier polyester multifilament yarn, or by giving a difference in an overfeed ratio at the time of a fiber blending process. . As described above, the fine denier polyester multifilament yarn has a larger yarn length than the thick denier polyester multifilament yarn, and therefore, the fine denier polyester multifilament yarn is mainly disposed in the outer layer of the mixed fiber yarn. It has a form, and is arranged in the shape of a tall or a loop. If the mixed yarn has a difference in the boiling water shrinkage of the polyester filament yarn, the outer layer is formed by smelting and relaxing after the fabric is formed. This is preferable because handleability in the process can be improved.

As the polyester crimped yarn used for the weft of the present invention, a yarn having a single fiber denier of less than 3.0 de is used, and the crimped yarn can be obtained by a known method. This is best illustrated. When the single fiber denier exceeds 3.0 de, the efficiency of collecting dust decreases, and the bending rigidity of the woven fabric increases, so that the object of the present invention cannot be achieved.

The woven fabric of the present invention is woven into the oblique weave structure using such yarns. At that time, it is important that the structure of the oblique weave is such that the number of warp or weft floats does not exceed three in a row. The number of floats in the hatori is the warp or
This means that the weft yarn is only on one side of the continuous and orthogonal yarn, and the number of floats in a satin fabric is at least four, and the present invention does not include such a satin fabric. As the woven fabric used in the present invention, 1 / 2,1 / 3,2 / 2,2 / 3 of the oblique weave, Is preferably exemplified. FIG. 1 is a sectional view showing an example of a section of a 2/3 oblique weave fabric used in the present invention. In FIG. 1, three warps 1, 2, and 3 are continuously arranged only on one side of the weft 6, and similarly, the warps 4, 5 are
Are arranged continuously only on one side opposite to the other side. Moreover, in the oblique weave design, the yarn arrangement has an arrangement portion in which there is no weft (or warp) orthogonal to this yarn between adjacent warps (or wefts). However, if the number of warp or weft floats exceeds three in a row, the warp or weft constituting the woven fabric will have less restraint and the degree of freedom will increase. Alternatively, the friction generated during washing may cause the generation of fluffy material, which is not preferable.

Next, the woven fabric of the present invention needs to be filled with the warp and the weft satisfying a converted fiber length per unit area of 90 to 140 m / cm ² , preferably 95 to 120 m / cm ² . Here, the converted fiber length is determined by the following equation.

Y: converted fiber length (m / cm ² ) W _wp : weight of one warp (g / cm) W _wf : weight of one weft (g / cm) T _wp : weaving density of warp (lines / cm) T _wf : Weaving density of yarn (book / cm) D _A : Denier of yarn of fine denier component of warp D _B : Denier of yarn of thick denier component of warp d _A : Denier of single fiber of fine denier component of warp d _B : Denier of single fiber of thick denier component of warp d _wf : Denier of single fiber of weft S: Difference in fiber length between fine denier component and thick denier component of warp _Wp and W _wf measure weight between woven fabric 10cm Convert and use.

Furthermore, only the woven fabric obtained by combining the above-mentioned mixed fiber, the specific weaving structure of the specific oblique weaving, and the reduced fiber length and having an air permeability in the range of 3 to ²⁰ cc / cm ² / sec are used. It is necessary to achieve the purpose of the invention. The ventilation rate is 3cc / cm
^{If the time} is less than ² · sec, the leakage dust increases due to the pumping effect, and it becomes difficult for the worker to take out the moisture generated during wearing out of the clothes. Also, the ventilation rate is 20 cc / cm ² / sec
When the air flow rate exceeds the range, fine dust passing through the woven fabric cannot be collected. In any case, if the air flow rate is out of the above range, the object of the present invention cannot be achieved.
The ventilation rate is measured by the JIS L 1096-6.27 A method (Fragile type).

In order to obtain such an air permeability, the reduced fiber length can be obtained by adjusting the density of the woven fabric within the range satisfying the above formula. The degree of the density of the woven fabric is indicated by the cover factor K. In the case of the fiber structure used in the present invention, the K may be in the range of 500 to 1,000. Cover factor K is Here, K: cover factor T _wp : warp weaving density (book / cm) T _wf : weft weaving density (book / cm) D _wp : warp denier D _wf : weft denier

[Effect of the Invention] Since the woven fabric of the present invention has the above-described configuration, a woven fabric that is excellent in dustproofness and that enables a dust-free garment excellent in wearing feeling can be obtained.

That is, in the woven fabric of the present invention, the air permeability of the fabric is relatively large unlike the conventional non-dust garment. However, the woven fabric of the present invention has a large converted yarn length of the warp and the weft present per unit area, and that the warp and the weft are woven in a special arrangement. Since the fine denier polyester multifilament yarn of the mixed fiber used in the present invention has a form mainly arranged in the outer layer portion of the mixed fiber, the efficiency of collecting dust can be improved. Further, the woven fabric has a relatively large air permeability, so that the leakage dust does not increase as described above, and the moisture generated by the worker during the wearing can be taken out of the clothes, so that the fabric is comfortable to wear. Also excellent in nature.

Further, since the woven fabric of the present invention uses a blended yarn composed of polyester multifilament yarn of fine denier fiber for the warp, a soft texture can be obtained by the effect of the fine denier polyester multifilament yarn. Furthermore, in order to use a polyester crimped yarn having a single fiber denier of less than 3.0 de as the weft, a yarn having a woven fabric bending rigidity in the range of 0.02 to 0.08 gcm in the warp direction is obtained. Flexural rigidity in the direction is 30-80% of the longitudinal direction
Because of this range, the warp direction has moderate hardness, the dust-free garment made of this woven fabric is hard in the length direction and soft in the waist direction, so that the flagging that occurs in the clothes when wearing the clothes is more pronounced in the weft direction than in the warp direction. The air movement in the clothes is directed around the body because of many occurrences, so that there is little outflow from the clothes collar and leakage dust is prevented.

Here, the bending rigidity means a value measured using a KES-pure bending tester manufactured by Kato Tech Co., Ltd.

[Examples] (1) Production of warp The filament yarn having a fine denier component has an intrinsic viscosity of 0.61.
Is melted at 295 ° C and drawn from a die with a hole diameter of 0.15mm and 70 holes at a draft of 420 and a spinning (drawing) speed of 3,800m / min.
Before winding, it was subjected to a tension heat treatment at a tension rate of 2%, a roller temperature of 170 ° C., and a processing time of 0.03 sec through a reverse taper roller. The boiling water shrinkage of the filament yarn of the fine denier component is
1.6%.

In addition, the filament yarn of the thick denier component is melted at 1,500 m / min after melting the polyester chip used for producing the filament yarn of the fine denier component according to a normal drawing yarn production method.
, And then hot-drawn at a drawing temperature of 85 ° C and a draw ratio of 6.5 using a drawing machine. The boiling water shrinkage of the filament yarn of the thick denier component was 10%.

Using the interlacing nozzle (filtration pressure: 3.1 kg / G overfeed ratio: 0.3%), a mixed fiber yarn having an interlace degree of 60 / m was obtained by using the filament yarn of the fine denier component and the filament yarn of the thick denier component. .

(2) Production of weft yarn Polyester filament yarn obtained by a conventional method was subjected to false twisting to obtain a 75 de / 72 fil wooly yarn.

(3) Manufacture of woven fabric Using the mixed fiber obtained above as the warp and the polyester wooly yarn as the weft, a carbon-coated conductive yarn (trade name: Metalian) manufactured by Teijin Limited at radial intervals of 1 cm. Arranged and woven. The fabric structure was a 3/2 twill structure and woven at a warp density of 55 yarns / cm and a weft yarn density of 42 yarns / cm. The fabric was finished by the usual dyeing finishing process. Using the woven fabric, a top-and-bottom integrated overall-type dust-free garment was produced. Table 1 shows the performance of the woven fabric and the performance of the dust-free garment.

Each measurement value shown in Table 1 is measured by the following measurement method.

Dust permeability: A measurement sample is fixed to the circular bottom surface (opening) of a metal funnel-shaped cone having a diameter of 18 cm and a height of 20 cm, and from the top of the cone.
Aspirate at a rate of 500 cc / min, measure the dust concentration of the air passing through the measurement sample (A) and the air not passing through the measurement sample (B) with a particle counter, and use the measured values A and B respectively. Means the value calculated by the following equation.

C = A / B × 100 C: Dust transmission rate (%) Leakage dust concentration: Each subject (height: 165 cm, weight:
60 kg, 90 cm around the bust, 30-year-old man wearing 100% cotton shirts, pants and underwear), fixing the sampling section of the sampling tee of the particle counter to the collar, and performing a downflow command clean room (class 1
0.5μm when walking with arms swing (120 steps / min) in 0)
The above dust concentration is shown by a value measured by a particle counter.

Wearing motion dust generation: Subjects wearing clean and washed dust-free clothing (height: 165 cm,
Weight: 60 kg, 30-year-old man wearing 100% cotton running shirt, cotton briefs underwear), clean air (0.
Arm swing walking in a chamber measuring 66 cm (width) x 53 cm (depth) x 198 cm (height), capable of supplying 693 L / min from the top and exhausting from the bottom with no dust of 5 microns or more (0 dust). 1 time / sec), and the dust concentration in the air in the chamber (05 m, dust of a micron or more) at this time is indicated by a value measured by a vertical counter.

Wearing comfort: A subject wearing a clean and washed dust-free garment exercised under the same conditions as in the wearing operation dust test, and showed the feeling of wearing during the walking and after the walking test.

For comparison, dust-free garments of Comparative Examples 1 to 4 were prepared. Table 1 also shows the performance of each dust-free garment.

In Comparative Examples 1 and 2, woven fabrics as shown in Table 1 were prepared using the same yarns as in the examples, and the same dust-free garment as in the examples was prepared.

In Comparative Example 3, a polyester fabric yarn was used for the warp and a fine denier polyester filament yarn was used for the weft to produce a woven fabric as shown in Table 1, and a dust-free garment similar to the example was produced.

In Comparative Example 4, a polyester filament yarn was used for the warp, and a polyester woolly yarn was used for the weft.
Fabrics as shown in the table were prepared, and the same dust-free garment as in the example was prepared.

As shown in Table 1, the dust-free garment of the present invention has extremely low dust permeability, and also has low leakage dust since the air permeability is within the range of the present invention, and also has excellent wearing comfort. I have.

In Comparative Example 1, the converted fiber length was short because the density of the used woven fabric was coarse, and the air permeability was large, so that the dust permeability was large and the dustproof property was poor.

In Comparative Example 2, since the woven fabric is a plain woven fabric, the dust permeability is inferior and the dustproofness is poor.

In Comparative Example 3, a woven fabric densely woven using fine denier yarn as the weft is used. However, since the air permeability is out of the range of the present invention, the leakage dust is large, the dust resistance is poor, and the wear is poor. The comfort is also poor.

In Comparative Example 4, since thick denier fiber was used, the converted fiber length was out of the range of the present invention, so that the dust permeability was poor and the wearing comfort was poor.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a cross section of the oblique weave fabric used in the present invention.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-28937 (JP, A) JP-A-60-259649 (JP, A) JP-A-61-138703 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) D03D 1/00 D03D 15/00

Claims (1)

(57) [Claims] 1. A weft yarn comprising a blend of a fine denier polyester multifilament yarn having a single fiber denier of less than 1.0 de and a thick denier polyester multifilament yarn having a single fiber denier in a range of 1.0 to 3.0 de. A single fiber denier is a woven fabric using a polyester crimped yarn of less than 3.0 de, and the mixed fiber has a yarn length in which the fine denier polyester multifilament yarn is larger than the thick denier polyester multifilament yarn. The yarn length difference is in the range of 1 to 10% based on the thick denier polyester multifilament yarn, and the fine denier polyester multifilament yarn is arranged mainly in the outer layer of the mixed fiber. The warp yarn and the weft yarn are woven in an oblique weave whose number of floats does not exceed three in a row.該経yarn and weft yarn is filled to satisfy the 90~140m / cm ² in terms of fiber length per unit surface area, the breathability of the fabric material is characterized by satisfying the 3~20cc / cm ² / sec Fabric for dust-free clothing.