JP2874996B2 - Dustproof clothing fabric - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven fabric for dust proof clothing, and more particularly to a woven fabric for dust proof clothing suitable for working in a clean room.

[Related Art] In recent years, the degree of integration of semiconductor elements has been improved in electronics, particularly in the field of semiconductors. Such a highly integrated semiconductor device is manufactured in a clean room or the like, and the cleanness of the clean room is required to be higher in proportion to the higher integration of the semiconductor device. An important issue for maintaining a clean room with high cleanliness is the prevention of dust generation from workers in the clean room. One of the dust generated by the worker is dust generated by the dust-proof clothing worn by the worker, and the other is generated by the worker's body and underwear worn by the worker. Dust that is transmitted through the dust-proof garment, and dust generated from the worker's body and underwear worn by the worker. It is known that there are three types of leakage dust that leaks from around the neck and around the face.

Conventionally, a woven fabric made of synthetic fiber filaments having no free ends of fibers has been widely used for such dust-proof clothing.
The dust generation of the dust-proof clothing is at a low level.

In addition, the density of the cloth used for the dust-proof garment has been reduced, or the coating process has reduced the problem of transmitted dust.

However, the fabric which has been densified or coated as described above has a drawback that air permeability is reduced. Furthermore, when wearing a dustproof garment made of such a low-permeability cloth, when the worker exercises, air leaks from the garment opening due to fluctuations in air pressure in the garment (this phenomenon is called a pumping effect), On the contrary, there is a problem that leakage dust increases, and furthermore, since the air permeability is low, moisture in the clothes cannot be discharged to the outside of the clothes.

In addition, in order to reduce the number of clothing openings and prevent dust from leaking, the overall type of upper and lower garments is often used as a dust proof garment. I have. However, when the wearer wears the overall-type dust-proof garment and exercises (especially forward bending exercise), the clothes cannot be displaced because the upper and lower parts are integrated. It is.

It is common practice in general clothing to use stretchable fabrics to improve this mobility. For example, there is an example using a knitted fabric or an example using a fabric woven with elastic yarn. However, the conventional stretch fabric has a large gap between yarns when the fabric is stretched (opens eyes).
It is not suitable for use in dust-proof clothing because of its high penetration of dust.

As described above, the conventional dust-proof garment emphasizes only the dust-proof property and sacrifices wearing comfort (such as stuffiness and motility), and has a problem in terms of work efficiency and humanity.

[Object of the Invention] An object of the present invention is to solve such a conventional problem and to propose a dustproof garment fabric that enables a dustproof garment to achieve both dustproofness and wearing comfort.

[Constitution of the Invention] The present invention uses a covering yarn coated with an elastic yarn with a polyester crimped yarn having a single fiber denier in the range of 0.5 to 3.0 de in at least one of a warp direction and a weft direction to form a fabric surface. Is a woven fabric having a twill structure composed of the polyester crimped yarn, and the woven fabric has the following conditions; a) Air permeability is in a range of 3 to 30 cc / cm ² / sec.

B) The elongation when a load of 1.5 kg / 5 cm is applied in the direction in which the covering yarn is used is in the range of 30 to 100%.

C) The transmittance of dust of 0.3 μm or more when stretched 30% shall be 30% or less.

Which satisfies the following.

The elastic yarn used in the dust-proof garment fabric of the present invention can be preferably exemplified by a polyurethane-based or polyether polyester block copolymer-based compound. In particular, in the case of a dustproof garment used in the field of semiconductors using various chemicals, it is desirable to use a polyether polyester block copolymer-based elastic yarn having excellent chemical resistance. The denier of the elastic yarn is preferably 30 to 100 de.

Since the elastic yarn is inferior in durability (chemical resistance, abrasion resistance, light resistance, etc.) as compared with the polyester fiber, in the present invention, the elastic yarn is used as a covering yarn covered with the polyester fiber and is not exposed on the surface of the fabric.

The polyester crimped yarn covering the elastic yarn must have a single fiber denier in the range of 0.5 to 3.0 de. 3.0d
In the case of e or more, the number of single fibers constituting the yarn is small, and the space between the fibers becomes large, so that it is difficult to prevent the transmission of dust, and the object of the present invention cannot be achieved. Conversely, when the single fiber denier is 0.5 de or less, the strength per single fiber is weak, it is easy to cut due to external force such as friction, and fuzz is generated and becomes dust, so that the present invention has a dustproof property. Objective cannot be achieved.

Polyester fiber used in the dust-proof clothing fabric of the present invention,
It is necessary to have a crimp to prevent the transmission of dust. The term “crimp” used in the present invention refers to a loop, looseness,
It is a slack or entangled thread.
The polyester crimped yarn can be obtained by a known method, and preferred examples thereof include a false twist crimping method, a method using an air jet, and a method using a difference in fiber shrinkage.

The covering yarn is used in at least one of the warp direction and the weft direction in the dustproof garment fabric of the present invention, but when the covering yarn is used only in the warp direction, the covering yarn is used in the weft direction. In the case of using only the polyester yarn, a polyester crimped yarn is used as the yarn used in the warp direction. The polyester crimped yarn may be a crimped yarn different in type from the polyester crimped yarn used for coating the elastic yarn. As a result, the woven fabric surface of the woven fabric for a dust-proof garment of the present invention is made of a polyester crimped yarn, and has a structure that is less permeable to dust and has excellent durability.

The woven structure of the dustproof garment fabric of the present invention must be a twill structure. In the case of a flat tissue, there are many tissue points at which interstitial voids are easily formed, and it is difficult to prevent the transmission of dust, and the object of the present invention cannot be achieved. On the other hand, in the case of the satin texture, the number of the texture points is too small, and it is vulnerable to external force such as abrasion, and the fluff is likely to be generated. The twill structure has an appropriate structure point, has few interstitial voids, and is strong against external forces. The twill structure is 1 / 2,1 / 3,2 / 3 Is preferably exemplified.

Cover factor of the fabric ( × Weaving density (book / cm)) should be in an appropriate range to satisfy the following requirements, but the cover factor in the direction perpendicular to the elastic yarn is the inter-thread void (strength) when the woven fabric is stretched. It is desirable that the elastic yarn is large in order to keep the opening) small. The direction in which the elastic yarn is used is 350 to 650, and the direction perpendicular to the elastic yarn is 400.
To 700 can be preferably exemplified.

The woven fabric for a dustproof garment of the present invention must have an air permeability in the range of 3 to 30 cc / cm ² / sec. In the case of a dust proof garment made of a woven fabric with a permeability of 3 cc / cm ² / sec or less, the moisture inside the garment cannot be discharged to the outside of the garment, which not only has a strong stuffiness and is inferior in wearing comfort, but also leaks dust due to a pumping effect. In many cases, the dust resistance is poor, and the object of the present invention cannot be achieved. Conversely, air permeability is 30cc / c
In the case of m ² / sec or more, the transmission of dust cannot be prevented, and the object of the present invention cannot be achieved.

The air permeability referred to in the present invention is measured by the JIS L 1096-6.27A method (Fragile type).

The woven fabric for a dust-proof garment of the present invention has an elongation at the time of applying a load of 1.5 kg / 5 cm in a direction using the covering yarn (hereinafter referred to as an elongation ratio).
Must be in the range of 30 to 100%. The dust-proof garment made of the cloth for dust-proof garment in the present invention is intended to reduce the leakage dust by reducing the pumping effect by utilizing the stretchability, and to improve the mobility, and the stretch rate is 30%.
In the case of%, these effects are so small that the object of the present invention cannot be achieved. Conversely, when the elongation percentage is 100% or more, it is easy to elongate, so that the elongation is large and the gap between the yarns is enlarged (opened), so that the penetration of dust increases and the object of the present invention cannot be achieved. The elongation in the present invention is JIS L 1096-6.14.1 (1) A
It is a value measured by the method (slow elongation method).

As a result of various studies on the elongation of the woven fabric during exercise while wearing a dust-proof garment made of an extensible woven fabric, the inventors found that the maximum was almost 30%. That is, the dust permeability when the woven fabric is stretched by 30% is important for the woven fabric for a dustproof garment having extensibility. Further, in recent years, the degree of integration of semiconductors is high, and the interval between integrated circuits is extremely small. Therefore, it is required that the size of dust to be controlled is also small. That is, in order to achieve the object of the present invention, it is necessary for the dustproof garment fabric of the present invention to have a transmittance of 30 μm or less for dust of 0.3 μm or more when stretched by 30%. In the present invention, the state in which the fabric is stretched by 30% refers to a state in which the fabric is stretched by 30% only in a direction having a large elongation ratio in the warp direction and the weft direction and is free in the other direction. The dust transmittance according to the present invention is 18 cm in diameter and 20 cm in height.
The sample in the state of being stretched by 30% as described above is fixed to the bottom circular surface (opening) of the metal funnel-shaped cone, and the sample is suctioned at a rate of 500 cc / min from the top of the cone, and the measurement sample is removed. The dust density of the air (B) controlled to about 10,000 / (dust of 0.3 μm or more) near the bottom circular surface of the conical body that does not pass through the transmitted air (A) and the measurement sample is reduced by the size of the dust. A value of 0.3 μm or more is measured by a light scattering type particle counter (particle counter), and a value calculated by the following equation using the measured values A and B.

C = A / B × 100 C; Dust Permeability (%) [Effect of the Invention] Since the woven fabric for a dustproof garment of the present invention has the above-described configuration, it is excellent in dustproofness and excellent in wearing comfort. It allows for dust-proof clothing.

That is, the woven fabric for a dustproof garment of the present invention uses a crimped yarn having a small denier other than the elastic yarn, and has a twill structure, so that the inter-void space is small and the slight inter-void space is also wound. The structure is covered with the compressed fibers, and the space between the fibers is thin and has a structure having many bent spaces. Although the woven fabric having such a structure is relatively easy to pass air, dust in the air is easily attached to and collected by the fiber due to Brownian motion or the like, and the dust permeability can be reduced even when the woven fabric is stretched, Enables clothing with excellent dust resistance and less wearing sensation.

Furthermore, since the woven fabric for a dustproof garment of the present invention uses elastic yarns, it has high extensibility, and the dustproof garment made of the woven fabric has a small pumping effect, is excellent in dustproofness, and is excellent in mobility. In addition, the elastic yarn is covered with a polyester fiber having excellent durability, and thus has excellent durability.

[Example] 167.3 parts of dimethyl terephthalate, 105 parts of tetramethylene glycol, 275 parts of polytetramethylene glycol having a number average molecular weight of 2,000 and 0.2 parts of tetrabutyl titanate were charged into a reactor, and a transesterification reaction was carried out at an internal temperature of 190 ° C. When 70% of the theoretical amount of methanol is distilled, the internal temperature is reduced.
The temperature was raised to 200 to 240 ° C., and the reaction was performed under a weak vacuum for 60 minutes and then under a high vacuum for 200 minutes. Here, 3.5 parts of Irganox 1010 (manufactured by Ciba-Geigy) and 0.21 part of Tinuvin 327 (manufactured by Ciba-Geigy) were added as stabilizers, and the mixture was stirred for 20 minutes to terminate the reaction. After pelletizing the resulting block copolymer polyether / polyester, the pellets were dried and then dried at 265 ° C.
To obtain 40de / 1fil of elastic yarn of block copolymerized polyether / polyester.

Using a twisting machine equipped with a hollow spindle, the elastic yarn,
Polyester false twisted crimped yarn obtained from information (75de / 36fi
l) A covering yarn (b) coated with (a) was obtained. Similarly, a covering yarn (d) coated with a polyester false twisted crimped yarn (75 de / 24 fil) (c) was obtained.

The false twisted crimped yarn (a) is used as the weft, and the covering yarn (b) is used as the weft.
Was used as a warp yarn to obtain a woven fabric (e) by weaving in a 2/3 twill structure. The woven fabric (f) was obtained by weaving in a flat structure using the same yarn as that of the woven fabric (e). The false twisted crimped yarn (c) was used as the weft and the covering yarn (d) was used as the warp to weave in a 2/3 twill structure to obtain a woven fabric (g). The greige (e)
(F) (g) is scouring, relaxing (90 ° C, 30 seconds),
Finishing was performed by drying (pin tenter), presetting (60 ° C, 30 seconds), dyeing, drying, and final setting (160 ° C, 30 seconds). At this time, the fabric (e-2) of Comparative Example 1 in which the finishing size was changed to increase the density of the fabric (e) was increased.
And a woven fabric (e-3) of Comparative Example 2 having a low density, a woven fabric (e-1) of an Example of the present invention having an appropriate density, and a woven fabric (f) of Comparative Example 3 having an appropriate density. The fabric (g) of Example 4 was obtained.

Using the five types of fabrics, overall-type dustproof clothing having the same pattern was prepared. Table 1 shows the results of testing the performance of the woven fabric and the dustproof garment.

The test methods for air permeability, elongation rate, and dust permeability are as described above. Wearing dust test: Wear the dust-proof garment to a man (length: 165 cm, weight: 60 kg, age 30) (wearing cotton upper and lower underwear), clean room (width 66 cm x depth 53 cm x height 198 c)
m, class 10), the dust concentration (0.3 μm or more) in the clean room during arm swing walking (120 steps / min) is indicated by a value measured by a light scattering type particle counter. The stuffiness of wearing comfort was indicated by feeling during the wearing operation dust test. The motility of wearing comfort was shown by feeling when performing radio exercises.

As shown in Table 1, the woven fabric and the garment for dustproof garments of the examples of the present invention are excellent in air permeability and elongation rate, low in dust permeability, low in dusting during wearing operation, and excellent in wearing comfort.
On the other hand, Comparative Example 1 has poor ventilation and poor wearing comfort (feeling of stuffiness). In Comparative Example 2, the air permeability was too large, the dust permeability was poor, the wearing dust was large, the elongation was small, and the wearing comfort (movability) was poor. Comparative Example 3 has a large dust permeability due to a flat structure and has poor wearing operation dust generation. In Comparative Example 4, since the single fiber denier of the polyester crimped yarn was large, the dust permeability was large and the wearing operation dust generation was poor.

────────────────────────────────────────────────── (5) Int.Cl. ⁶ Identification symbol FI D03D 1/00 D03D 1/00 Z (56) References JP-A-1-321904 (JP, A) JP-A-59-179845 ( JP, A) JP-A-4-73202 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D03D 15/00 D03D 15/08 D02G 3/00-3/48 A41D 13 / 00 D03D 1/00

Claims (1)

(57) [Claims] 1. A covering yarn coated with an elastic yarn with a polyester crimped yarn having a single fiber denier in the range of 0.5 to 3.0 de in at least one of a warp direction and a weft direction. A woven fabric having a twill structure composed of shrink-processed yarn, the woven fabric having the following conditions: a) Air permeability is in the range of 3 to 30 cc / cm ² / sec. B) The elongation when a load of 1.5 kg / 5 cm is applied in the direction in which the covering yarn is used is in the range of 30 to 100%. C) The transmittance of dust of 0.3 μm or more when stretched 30% shall be 30% or less. A textile for dustproof clothing, characterized by satisfying the following.