JPH03220339A - Woven fabric for dust-proof wear - Google Patents

Abstract

PURPOSE:To prepare the subject woven fabric having good dust-proof property and wearing touch by weaving specific blended yarns as warps with polyester twisted yarns as wefts in a twill weave having specified filling state and air permeability. CONSTITUTION:Blended yarns comprising fine denier polyester multifilaments having a single filament fineness of <1.0de and mainly arranged in the outer layers and polyester multifilaments having a single filament fineness of 1.0-3.0de and mainly arranged in the inner layers, both the multifilaments having a filament length difference of 1-10% (based on the short polyester multifilaments) therebetween as warps 1-5 are woven with polyester twisted yarns having a single filament fineness of <3.0de as welfs 6 into a twill weave in which the number of floated yarns does not exceed 3. The converted lengths of the filament per unit surface area are set at 90-140m/cm<2> and the air permeability of the woven fabric is set at 3-20cc/cm<2>/sec.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a fabric for dust-free clothing. In particular, it is used for dust-free clothing fabrics suitable for work in clean rooms.

[Prior Art] In recent years, in the field of electronics, particularly in clean rooms where highly integrated semiconductors are manufactured, the cleanliness of the room is required to be high in proportion to the level of integration. In order to maintain a clean room at a high level of cleanliness, it is necessary to prevent dust from being generated by workers working in the room. Dust generated by workers includes, firstly, material dust generated from the outer clothing worn by the worker, and secondly, dust generated from the worker's body itself and the underwear worn by the worker. The third type is dust that is transmitted through the outer clothing material, and the third type is dust that is generated from the worker's body and the underwear that the worker wears, and which is generated from the openings of clothing (cuffs, hem openings, and around the neck). 3 of the leaked dust leaking from the area around the face, etc.
There are different types.

In the past, synthetic fiber filament yarns with fewer free ends of fibers were often used for dust-free garments in order to prevent the generation of material dust, so the level of material dust generation has been reduced to an extremely low level, and the problem of fluffing has been resolved. has been done.

However, the above-mentioned transmitted dust and leaked dust cannot be said to be at a sufficient level. For example, attempts have been made to use high-density fabrics or coated 1IIII materials to reduce the transmitted dust. It is true that such high-density fabrics have low air permeability and can prevent dust from passing through, but on the other hand, when wearing clothing made of such low air permeable fabrics, they have the disadvantage of increasing leakage of dust. Furthermore, it is difficult for workers to release the moisture generated when wearing the low-air permeable fabrics, which not only increases the discomfort of wearing them, but also reduces the texture of such high-density fabrics. It was paper-like and hard, and the feeling of wearing was poor, as it made a crinkly sound.

[Object of the Invention] The object of the present invention is to eliminate such conventional drawbacks and to provide dust-free clothing that is excellent in dust resistance and comfortable to wear! ! It is to suggest something.

[Structure of the Invention] The present invention is comprised of a fine denier polyester multifilament yarn with a single fiber denier of less than 1.0 de and a thick denier polyester multifilament yarn with a single fiber denier in the range of 1.0 to 3.0 de as warp threads. A woven fabric using a mixed yarn of The yarn length is larger than that of the filament 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 larger than the mixed fiber yarn. The warp and weft are arranged mainly in the outer layer, and the warp and weft are woven into a twill weave in which the number of floating threads does not exceed three consecutively, and the warp and weft are arranged in the outer layer. 90 to 140 in terms of converted fiber length per unit surface area
This is a dust-free fabric for clothing, characterized in that the air permeability of the fabric satisfies the air permeability of 3 to 20 cc/J/see.

The mixed yarn used in the present invention is manufactured by a known method such as an electrospreading method, a method of fluid opening and doubling, or a method using fluid turbulent jetting, but the productivity of the yarn may vary.

In consideration of ease of handling, those obtained by interlace processing are most preferably used.

A fine denier polyester multifilament yarn having a single fiber denier of less than 1.0 de is used as the mixed yarn, but preferably the single fiber denier is 0.01 to 0.5 d.
A range of e is good. Further, the fine denier polyester multifilament yarn of the mixed fiber yarn has a larger yarn length than the thick denier polyester multifilament yarn, and the yarn length difference is in the range of 1 to 10%; This can be obtained by providing a difference in submergence shrinkage rate between the denier polyester multifilament yarn, or by providing a difference in overfeed rate during fiber blending treatment. As described above, the fine denier polyester multifilament yarn has a larger yarn length than the thick denier polyester multifilament yarn, and for this reason, the fine denier polyester multifilament yarn is mainly arranged in the outer layer of the mixed fiber yarn. It has a shape and is arranged in a walnut shape or a loop shape. When the mixed fiber yarn has a difference in submergence shrinkage rate from the polyester filament yarn,
Since the form arranged in these outer layer parts is generated by scouring, relaxing treatment, etc. after being made into a woven fabric, it is possible to improve the handleability in the weaving process, which is preferable.

The polyester crimped yarn used for the weft of the present invention is
Single fiber denier is 3. A θde ungrooved yarn is used, and the crimped yarn can be obtained by known methods, with a false-twisted crimped yarn being the most suitable example. The single fiber denier is 3.0d
If it exceeds e, the dust collection efficiency decreases, and
The bending rigidity of the fabric becomes large, making it impossible to achieve the object of the present invention.

The article of the present invention is woven into a twill weave structure using such yarn. In this case, it is important that the twill weave has a structure in which the number of floating warp or weft yarns does not exceed three consecutively. The number of floats in slant weaving refers to the number of warp threads or
This means that the weft threads are present only on one side of the continuous orthogonal threads, and in a satin fabric, the number of floating threads is at least four, and the present invention does not include such a satin fabric. The textile structure used in the present invention is 1/2.1/3.2/2.2/3
Suitable examples include the slanted weave of ``Momo'' and the French slanted weave of ``Momo''.

FIG. 1 is a sectional view showing an example of the cross section of a 2/3 twill weave fabric used in the present invention. In Fig. 1, warp 1,
Three yarns 2.3 are consecutively arranged on only one side of the weft 6, and two warps 4, 5 are consecutively arranged only on the opposite side of the weft 6. Moreover, in the structure of the oblique weave, the thread arrangement has a part where there is no weft or warp perpendicular to the adjacent warp threads (or weft threads).However, the warp threads, Or, if the number of floating weft yarns exceeds 3 in a row, the restraint of the warp or weft yarns that make up the fabric decreases and the degree of freedom increases. This is undesirable because the friction generated therein causes the yarn to become fluffy and generate dust.

Next, in the fabric of the present invention, the warp and weft have a converted fiber length per unit area of 90 to 140 m/cJ, preferably 95 to 1
20 m/'-. Here, the converted fiber length is determined by the following formula.

mouth W,,,XT=p DA (1-3/
100) Y: Converted fiber length (m/cat) VLp: Weight of one warp (g/cm) Weight of one W1 weft R (g,/cm ) T,, p: Weaving density of warp (book') cm) T1. : Weaving density of the weft (pieces/cm) DA: Denier of the yarn of the fine denier component of the warp DB: Denier of the yarn of the thick denier component of the warp dA: Denier of the single fiber of the fine denier component of the warp dB: Denier of the single fiber of the fine denier component of the warp Denier dwt of single fiber of thick denier component: Single fiber denier of weft S: Difference in fiber length between fine denier component and thick denier component of warp.Wwp and Wwt are calculated by measuring the weight of yarn between 10 cm of fabric. used.

Furthermore, the above-mentioned mixed fiber yarn, a specific twill weave structure,
In order to achieve the object of the present invention, only a woven fabric having an air permeability in the range of 3 to 20 cc/ci/sec is required to achieve the object of the present invention. If the ventilation amount is 3 cc/a&, sec without grooves, leakage of dust will increase due to the pumping effect, and it will be difficult for workers to release moisture generated while wearing the clothes.

Furthermore, if the ventilation amount exceeds 20 cc/a&/sec, it will not be possible to collect minute dust passing through the IIaw, and in any case, if the ventilation amount is outside the above range, the present invention unable to achieve its purpose. Note that the ventilation amount is measured by JIS L 1096-6.27 A method (Frazier type).

In order to obtain such an amount of air permeability, the converted fiber length is within a range that satisfies the above formula, and can be obtained by adjusting the density of the woven fabric. The degree of density of the fabric is indicated by the cover factor, but in the case of the fabric structure used in the present invention, the K
may be in the range of 500 to 1,000. The cover factor is K = T WpX (T5 W-+ T
-t be.

[Function of the Invention] Since the woven fabric of the present invention has the above-described structure, a woven fabric that has excellent dustproof properties and provides a dust-free garment that is comfortable to wear can be obtained.

That is, the fabric of the present invention has relatively high air permeability, unlike conventional fabrics for dust-free clothing.

However, in the woven fabric of the present invention, the converted yarn length of the warp and weft existing per unit area is large, the warp and weft are woven with a special arrangement, and furthermore, the warp and weft are woven with a special arrangement. Since the fine denier polyester multifilament yarn of the mixed fiber yarn used is arranged mainly in the outer layer portion of the mixed fiber yarn, the dust collection efficiency can be increased. Furthermore, since the fabric has relatively high breathability, the leakage of dust does not increase as mentioned above, and the moisture generated by the worker while wearing it can be released from the clothes, making it comfortable to wear. It is also excellent in sex.

In addition, since the woven fabric of the present invention uses a blended yarn consisting of polyester multifilament yarns made of fine denier fibers for the warp yarns, a soft texture can be obtained due to the effect of the fine denier polyester multifilament yarns. Furthermore, since the weft is made of ungrooved polyester crimped yarn with a single fiber denier of 3.0 de, the bending stiffness of the m-piece is in the range of 0.02 to 0.08 g-cm in the warp direction. Furthermore, the bending stiffness in the weft direction is in the range of 30 to 80% of that in the warp direction, so the warp direction has appropriate hardness, and the dust-free garment made of this woven fabric is stiff in the length direction and has a stiffness around the waist. Because it is soft in the direction, when wearing clothes, more flagging occurs in the latitude direction than in the warp direction, so air movement within the clothes is directed around the body, so there is less leakage from the hakama part of the clothes, and dust leakage is prevented. Ru.

In addition, the bending rigidity here refers to KE made by Kadochik ■.
S- refers to the value measured using a pure bending tester.

[Example] (1) Production of warp The filament yarn of fine denier component has an intrinsic viscosity of 0.6.
The chip of No. 1 was melted at 295°C, and a draft of 420. Spinning (take-up) speed 3
, 800 m/min, and before winding, it was subjected to tension heat treatment via a reverse tapered roller at a tension rate of 2%, a roller temperature of 170° C., and a processing time of 0.03 sec. The submersion shrinkage rate of the filament yarn of the fine denier component was 1.6%.

Further, the filament yarn of the thick denier component is obtained by melting the polyester chips used in the production of the filament yarn of the fine denier component according to the ordinary method for producing drawn yarn.
The yarn was once wound up as an undrawn yarn at a spinning speed of m/win, and then hot-stretched using a stretching machine at a stretching temperature of 85° C. and a stretching ratio of 6.5. The submersion shrinkage rate of the filament yarn of the thick denier component was 10%.

This fine denier component filament yarn and thick denier component filament yarn were interlaced using an interlace nozzle (pressure pressure: 3.1 kg/G overfeed rate 20
．． 3%) A mixed fiber yarn with an interlace degree of 60 and a length of 7 m was obtained.

(2) Production of weft yarn A woolly yarn of 75 de/72 fit was obtained by false twisting polyester filament yarn obtained by a conventional method.

(3) The mixed fiber yarn obtained in the fabrication process was used for the warp and polyester woolly yarn was used for the weft, and carbon-coated conductive yarn [trade name: Metalian] manufactured by Teijin ■ was arranged at 1 cm intervals in the warp direction. , incorporated. The textile structure uses 3/2 twill structure,
It was woven with a warp density of 55 threads/cm and a weft thread density of 42 threads/cm. The fabric was finished using a conventional dye finishing process. Using this fabric, an overall-type dust-free garment with an integrated top and bottom was created. The performance of the fabric and the dust-free garment are shown in Table 1.

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

Dust transmittance: A measurement sample was fixed on the bottom circular surface (opening) of a metal funnel-shaped cone with a diameter of 19 cm and a height of 20 cm, and suction was applied from the top of the cone at a rate of 500 cc/min to remove the measurement sample. (A) and air that does not pass through the measurement sample (B).
) is measured using a particle counter and calculated using the following formula using the respective measured values A and B.

c=A/Bx100 C: Dust transmittance (%) Leaked dust concentration: Each subject (height = 165 cm
, weight: 60 kg, bust circumference 90 cm, age 30 years old, male, wearing 100% cotton shirt, pants, and underwear), and the sampling part of the Particle Counter sampling sleeve was fixed to the hakama part. Arm swing walking (in a down flow command clean room (class 10)
The dust concentration of 0.5 μm or more when walking at a speed of 120 steps/min (120 steps/min) is shown as a value measured with a particle counter.

Wearing motion dust generation: Subject wearing clean, laundered dust-free clothing (height: 165cm)
m, weight: 60 kg, age 30 years old male, cotton 1
00% running shirt and cotton briefs underwear) can supply clean air (zero dust particles larger than 0.5 microns) from the top at 693 L/min and exhaust from the bottom, with a size of 66 cm. (width) x 53cm (depth> x19
Arm swing walking (1/time) in a chamber of 8 cm (height)
The dust concentration in the air in the chamber at this time (0.5 m, dust of microns or more) is shown as a value measured with a vertical counter.

Wearing comfort: Subjects wearing clean, laundered dust-free clothing exercised under the same conditions as the wearing motion dust generation test, and evaluated the wearing comfort during and after the walking test.

(Hereinafter, blank space) Dust-free clothes of Comparative Examples 1 to 4 were created for Hi-same. The performance of each dust-free garment is also shown in Table 1.

In Comparative Examples 1 and 2, the same yarns as those in the Examples were used to create fabrics as shown in Table 1, and dust-free clothing similar to those in the Examples were created.

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

In Comparative Example 4, a woven fabric as shown in Table 1 was prepared using polyester filament yarn for the warp and a polyester woolly yarn for the weft, and a dust-free garment similar to that of the example was prepared.

As shown in Table 1, the dust-free clothing of the present invention has extremely low dust permeability and air permeability within the range of the present invention, resulting in low dust leakage and excellent wearing comfort. There is.

In Comparative Example 1, the density of the woven fabric used was fine, so the converted fiber length was short, and the air permeability was high; High dust permeability and poor dust resistance.

In Comparative Example 2, since the textile structure is a plain weave, the dust permeability is poor and the dust proofing property is poor.

In Comparative Example 3, a densely woven fabric using fine denier yarns for the weft is used, but the breathability is outside the scope of the present invention, resulting in a large amount of leaked dust and poor dust resistance.
It is also not comfortable to wear.

In Comparative Example 4, since thick denier fibers are used, the converted fiber length is outside the range of the present invention, resulting in poor dust permeability and poor wearing comfort.

[Brief explanation of drawings]

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

Claims (1)

[Claims] A mixed fiber yarn consisting of a fine denier polyester multifilament yarn with a single fiber denier of less than 1.0 de and a thick denier polyester multifilament yarn with a single fiber denier in the range of 1.0 to 3.0 de was used as the warp, and as the weft. A woven fabric using a crimped polyester yarn having a single fiber denier of less than 3.0 de, wherein the mixed yarn has a fine denier polyester multifilament yarn having a yarn length larger than a 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 yarn. The warp and weft yarns are woven into a diagonal weave in which the number of floats does not exceed 3 consecutively, and the warp and weft yarns have an equivalent fiber length per unit surface area of 90 to 90. 140m/cm^
2, and the breathability of the fabric is 3 to 20cc.
A dust-free clothing fabric that satisfies /cm^2/sec.