JP2888939B2 - Dust proof clothing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dust proof garment, and more particularly to a dust proof garment suitable for use 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. One of the important factors in maintaining a clean room with high cleanliness is to prevent dust generation from workers in the clean room. One of the dust generated by the worker is the dust generated from 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 that is generated from the worker's body and underwear worn by the worker, is the dust that is transmitted through the garment. It is known that there are three types of leaked dust that leaks from the above.

Conventionally, in such a dust-proof garment, a long fiber of synthetic fiber having no free end of the fiber is often used, and the dust generation of the garment is low.

In addition, the density of the cloth used for the dust-proof garment is improved or the dust-collecting property is improved by the coating treatment, and the problem of transmitted dust is reduced.

However, as described above, a fabric having a high density or a coating treatment 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). Increases leakage dust.

As a method of solving such a problem, a method of reducing the number of openings of clothes or tightening the openings is used. For example, a method of strongly tightening a cuff or the like using a rubber string is most often used. When the clothing opening is tightened in this manner, uneven wrinkles are formed in the tightened portion, dust easily accumulates in the recess, the accumulated dust drops off during work, and the cleaning effect at the time of clean washing. In addition to lowering the pressure, there is a problem that the feeling of pressure, particularly in the tightened portion, is too strong. On the other hand, a method of using an elastic knitted fabric for a collar or the like is often used. However, the knitted fabric has large irregularities on the surface of the fabric as compared to the woven fabric, and has a large tissue clearance, so that dust easily adheres to the knitted fabric, and has the same problem as described above. Although there is an object using a processed material or the like, this material has a problem that the air permeability is very small and a portion in close contact with the skin is stuffy and the feeling of wearing is poor. It is easily conceivable to use stretchable woven fabrics using polyurethane-based elastic yarns, but polyurethane-based elastic yarns can only be dyed at low temperatures because of their poor heat resistance.
Generally, it is used in combination with a nylon yarn which can be dyed at a low temperature. Such stretchable woven fabrics, both polyurethane and nylon, have poor chemical resistance (especially acids) and are not suitable for use as dustproof garments for clean rooms in the manufacture of semiconductor devices that use a large amount of chemicals.

Further, as another method, for example, a dust proof garment provided with a fan and a power supply for reducing the air pressure inside the garment to a negative pressure has been proposed (Japanese Patent Application Laid-Open No. 62-33806). However, the dust-proof garment to which the above-described device is attached becomes a garment sacrificing workability and comfort, and is not what the present inventors intend.

As another method, it has been proposed to attach an electret sheet to a clothing opening (Japanese Patent Laid-Open No. 155318/1986). However, this method also has a large pressure fluctuation in the clothes and a large air flow rate flowing out of the clothes opening, so that the effect is small. In addition, it is troublesome to carry out the electret processing of the fiber or the fabric, and the cost increases. There was a disadvantage.

[Object of the Invention] An object of the present invention is to solve such a conventional problem and to propose a dustproof garment having a high dusting prevention effect in which air in the dustproof garment is prevented from leaking into a clean room without restriction. is there.

[Constitution of the Invention] The present invention provides (1) an overall-type dust-proof garment having a structure in which a collar portion and a cuff portion fit a human body are made of a stretchable fabric and a non-stretchable fabric, and at least the collar portion, and At the cuffs, the following requirements: (A) A covering yarn in which an elastic yarn made of a polyether polyester block copolymer is covered with a polyester filament yarn is used in at least one of the warp and weft directions. ) The elongation at the time of applying a load of 1.5 kg / 5 cm in the direction using the covering yarn is in the range of 30 to 150%. (C) The air permeability is in the range of 1 to 30 cc / cm ² / sec. A dustproof garment characterized by using a stretchable fabric satisfying the above.

The dustproof garment of the present invention is an overall type dustproof garment having a structure in which a collar portion and a cuff portion fit a human body, and an upper garment portion and a lower garment portion are integrally formed. Is a dustproof garment that is not separated, and further has a structure in which a collar and a cuff fit a human body.
It is not preferable that the hem, cuffs and collar of the upper garment are open. The dust-proof garment of the present invention has a small number of openings, and it is necessary that at least the collar and the cuff have a structure with good air-tightness in the garment.

The dustproof garment of the present invention is composed of a stretchable woven fabric and a non-stretchable woven fabric. The stretchable woven fabric includes an elastic yarn made of a polyether polyester block copolymer.

The elastic yarn used in the dust-proof garment of the present invention is a polyester elastic yarn, in which a hard segment is a polybutylene terephthalate-based polyester composed of a terephthalic acid component and a butylene glycol component, and a soft segment is a polyoxybutylene glycol-based polyether. Block copolymer polyether / polyester type elastic yarn is used.

The terephthalic acid component constituting the hard segment may be partially replaced with a dicarboxylic acid component or an oxycarboxylic acid component other than the terephthalic acid component of usually 30 mol% or less, and / or the glycol component may be one of them. The part may be replaced with a dioxy component other than the butylene glycol component, usually 30 mol% or less.

The polyether portion constituting the soft segment is mainly made of polyoxybutylene glycol, but may be a polyether in which 30% or less of its repeating unit is replaced by a dioxy component other than the butylene glycol component. The production of such block copolymer polyether / polyester can be carried out according to the method proposed in JP-A-58-91819. The block copolymerized polyether / polyester may be added with an ultraviolet absorber or an antioxidant as needed.

Such an elastic yarn is used as a covering yarn covered with a polyester filament yarn. In order to coat the elastic yarn, a method of covering with a polyester filament using a hollow spindle, and a method of aligning the elastic yarn and the polyester filament and twisting them to cover them with a difference in elongation are used. can do.

In the stretchable woven fabric used in the present invention, the covering yarn is used in at least one of warp and weft. In the case where the covering yarn is used only as a warp, polyester wefts are preferably exemplified from the viewpoint of low dust generation, excellent durability, good feel, and little difference in dyeability from the warp. . When the covering yarn is used only as the weft, it can be obtained by exchanging the warp and the weft. Further, in the present invention, the covering yarn can be used for both warp and weft. The woven structure of the stretchable woven fabric used in the present invention is not particularly limited, but a twill structure is preferably exemplified in terms of dust collection and air permeability.

The stretchable woven fabric has a direction of 1.
The elongation under a load of 5 kg / 5 cm (hereinafter referred to as the elongation) 3
It should be in the range 0-150%, preferably 50-100%. The dust-proof garment of the present invention is used for the mouth of a garment (cuff, collar, etc.)
The clothing dimensions (circumferential direction) are slightly smaller than the human body dimensions,
When the stretching rate is 30% or less, a feeling of pressure on the human body is large and uncomfortable, and it is difficult to pass the hand through the cuffs when the stretching rate is 30% or less. is there. On the other hand, when the elongation is 150% or more, the fitting to the human body is weak, and the effect of preventing air leakage in the clothes is insufficient, so that the object of the present invention cannot be achieved. The elongation rate as referred to in the present invention is JIS-L-1096-6.14.1 (1) Method A (constant speed elongation method)
It is measured by.

The stretchable woven fabric used in the present invention needs to have appropriate air permeability in terms of dustproofness and wearing feeling. If the air permeability is too small, the part that fits the human body is stuffy and uncomfortable, while if the air permeability is too large, the dust collecting property is poor, and the dustproof effect of the present invention cannot be obtained. That is, the air permeability of the stretchable woven fabric of the present invention needs to be in the range of 1 to 30 cc / cm ² / sec.

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

The non-stretchable woven fabric used in the present invention refers to a woven fabric having an elongation of 10% or less in any of the warp, weft, and direction. A preferred example of the non-stretchable woven fabric is a woven fabric made of polyester long fiber that generates less dust. The non-stretch fabric preferably has a gas permeability of 0.5 to 30 cc / cm ² / sec, more preferably 0.5 to 10 cc / cm ² / sec. In the present invention, conductive fibers and antistatic fibers can be mixed in the stretchable fabric and the non-stretchable fabric.

The dust garment of the present invention is composed of a stretchable woven fabric and a non-stretchable woven fabric, and at least the cuff portion and the collar portion are formed of the stretchable woven fabric. The sleeve portion is used when the airtightness of the clothes is more strongly required, and it is not necessary to use the sleeve portion in the case of a dustproof garment or the like in which the air inside the clothes is to be discharged from the collar portion. Alternatively, the stretchable woven fabric can be appropriately used for a clothing portion corresponding to a portion where the skin stretches greatly during exercise or the like, such as the back, buttocks, knees, and elbows.

In the dustproof garment of the present invention, the method of using the stretchable woven fabric,
For the cuffs, collar, and hem, the direction in which the stretch rate of the stretchable woven fabric is large (longitude, weft) is used in accordance with the direction around the human body. When the stretchable fabric is used for other portions, it is preferable to use the stretchable fabric in accordance with the elongation of the human skin.

In the present invention, it is preferable that the stretchable fabric and the non-stretchable fabric are joined (sewn, adhered, fused, and the like) to have the same joint line dimension, but the present invention is not limited to this. If there is a dimensional difference between the joints, the longer woven fabric will have uneven wrinkles (also called gathers) at the joints, and dust will adhere and accumulate easily, reducing the dustproof effect and reducing the cleaning effect. Yes, the effects of the present invention cannot be achieved. The dimension referred to here is a dimension in a state where little tension is applied to the woven fabric, does not include a dimensional difference caused by a slight tension applied at the time of joining, and a dimensional difference of about 5% is allowable in the present invention.

In the present invention, the stretchable fabric and the non-stretchable fabric are joined to the same size as described above. However, in order to maintain the fit to the human body, the stretchable fabric is gently moved toward the tip of the garment (either linearly or curvedly). (Good) It becomes possible by reducing the size of clothes (around size) and can be used for cuffs, collars, and hem.

[Operation of the Invention] The dust garment of the present invention has a clothing opening (at least a cuff,
Since the collar portion is made of stretchable fabric, it has excellent fit to the human body, prevents outflow of air in clothes, and exhibits a dustproof effect.

Since the elastic fabric used in the dust garment of the present invention uses an elastic yarn made of a polyether polyester block copolymer, it can be used in common with the polyester fiber (coated fiber, mixed fiber) and has the same color in dyeing. It is a dustproof garment with excellent chemical resistance.

Since the stretchable cloth used for the dustproof garment of the present invention is a woven fabric, the surface is flat and hard to adhere to dust compared to a knitted fabric, and if it adheres, it is easy to fall off. Therefore, it is cleaned with an air shower used when entering a clean room. It is easy to produce, and a cleaning effect is easily obtained in clean washing.

The stretchable woven fabric used in the dust-proof garment of the present invention has a suitable stretchability and a suitable air permeability, so that it has a good fit to the human body, exhibits a dust-proof effect, and has a small feeling of pressure and stuffiness. Thus, it is possible to obtain a dust-proof garment excellent in wearing comfort with less wear.

ADVANTAGE OF THE INVENTION In the dustproof garment of this invention, the wrinkles of the joint part of a stretchable woven fabric and a non-stretchable woven fabric are few, there is almost no accumulation of dust, and it is excellent in dustproofness.

[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 part of tetrabutyl titanate were charged into a reactor, and a transesterification reaction was performed 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 reaction was terminated after stirring for 20 minutes. After pelletizing the resulting block copolymer polyether / polyester, the pellets were dried at 265 ° C.
To obtain 40de / 1fil of elastic yarn of block copolymerized polyether / polyester.

The elastic yarn is provided with a hollow spindle using a twisting machine,
A covering yarn covered with a polyester wooly yarn (75 de / 72 fil) was obtained.

Using the covering yarn as the weft and the polyester filament yarn (75de / 36fil) as the warp, weaving the greige fabric obtained by weaving with a 2/3 twill structure, relaxing (90 ° C,
30 seconds), drying (pin tenter), preset (60 ° C, 30
Second), dyeing, drying, final set (160 ° C, 30 seconds)
To obtain a stretchable fabric. The stretch rate of the stretchable woven fabric is 5.4% in the warp direction, 51.7% in the weft direction,
The air permeability was 10.1 cc / cm ² / sec.

On the other hand, polyester filament yarn (75de / 36fil) is used as warp yarn, and polyester wooly yarn (100de / 48fi)
Using l) as the weft, a greige fabric obtained by weaving with a 2/3 twill structure was subjected to the same finishing treatment as the stretchable fabric to obtain a non-stretchable fabric. The elongation percentage of the non-stretchable fabric is 1% in the longitudinal direction,
Latitudinal direction: 5.3%.

The non-stretchable woven fabric was used for the body and sleeves, and the stretchable woven fabric was used for the cuffs, the collar, and the hem to sew dustproof clothing.
FIG. 1 shows the structure of the cuff portion of the dustproof garment. FIG. 1 is a plan view for explaining the structure of the cuff portion. In FIG. 1, a cuff cloth (A) made of a stretchable woven fabric has a joining line b to
The sleeve end lines a to a 'have a substantially trapezoidal shape shorter than the length of b'. The joining lines b to b 'have the same dimensions as the joining lines c to c' of the sleeve cloth (B). The joining lines b-b 'and c-c'
Then, the sleeve is folded back along the sleeve length direction, and the sleeve underline 1 is sewn. FIG. 2 is a side view showing a state where the sleeve is folded back along the sleeve length direction. As shown in FIG. 2, a cuff having a structure with no wrinkles at the joint and a small sleeve end is obtained.
The dustproof garment of the present invention (Example 1) having a structure in which the length of the joining line was the same for the collar portion and the hem portion, the length of the joining line was the same, no wrinkles were formed, and the tip portion was small was obtained.

The non-stretchable fabric was used for the body and sleeves, and a dustproof garment was sewn using the stretchable fabric for the cuffs, collar and hem.
FIG. 3 shows the structure of the cuff portion of the dustproof garment. FIG. 3 is a plan view for explaining another example of the structure of the cuff portion. In FIG. 3, the cuff cloth (C) made of stretchable fabric is cut so that the lengths of the joining lines f to f 'and the sleeve end lines e to e' are equal, and has a dimension shorter than the joining lines g to g 'of the sleeve. It is rectangular.
In a state where the joining lines ff to f 'of the cuff portion (C) are extended to the same size as the joining lines gg to g' of the sleeve (extended by 20 to 30%), the joining lines ff to gg and g to g 'are extended. , And folded back in the sleeve length direction to sew the sleeve underline 2. As shown in FIG. 4, a cuff portion having wrinkles was obtained at the joint. FIG. 4 is a side view showing the sleeve and the state folded back along the sleeve length direction.
A dustproof garment (Example 2) according to another embodiment of the present invention having a structure in which a stretchable woven fabric was stretched and sewn at a joint portion of the collar portion and the hem portion in the same manner as described above was obtained.

The non-stretch woven fabric is used for the body and sleeves, and when a dustproof garment using a stretch knit (100 de / 48 fil, a milling knit made of polyester wooly yarn) for the cuffs, collar and hem is sewn, The elastic fabric and the elastic knit were joined in the same manner as in Example 2 (Comparative Example 1) to obtain a dust proof garment (with wrinkles at the joint).

In the dustproof garment made of only the non-stretchable woven fabric, a dustproof garment of Comparative Example 2 using a rubber cord at the cuffs and hem (there is a wrinkle in the portion where the rubber cord is used) was obtained.

After the obtained dust proof clothing has been cleaned with pure water,
The wearing operation dust test and the feeling of wearing were evaluated, and further, after being left in a general office for 24 hours on a hanger, a clean washing with pure water was performed again to perform a material dust test.

Wearing dust generation test is to extend the dustproof clothing 165cm, weight 60k
g, 30-year-old man (wearing cotton underwear)
The particle counter (Rion Co., Ltd.) determines the dust concentration (0.11μm ≦) in a clean room (width 66cm x depth 53cm x height 198cm, class 10) during arm swing walking (120 steps / min) in the clean room. It shows by the value measured in.

 The feeling of wearing was indicated by feeling during the wearing operation dust test.

The clothing dust test is measured by the JIS-B-9923,4, (2) method, and is expressed as a value of 0.11 μm ≦ dust concentration.

 The test results are shown in Table 1.

As shown in Table 1, the dust proof garment of Example 1 of the present invention has a good air-tightness in the garment, and has little wrinkling during the wearing operation because there are few wrinkles at the joints. ,
It is excellent in dustproofness, and has excellent wearing feeling without pressure on the cuffs, collar and hem. Since the dustproof garment of Example 2 has wrinkles at the joints, the dust generation of the material is slightly more than the dustproof garment of Example 1, but the feeling of wearing is good. Comparative Example 1 has cuffs, collars,
Since the knitted fabric is used for the hem portion, the dust generated during the wearing operation is large, and the material dust is also large, resulting in poor dustproofness. The dustproof garment of Comparative Example 2 has wrinkles at the joints and is inferior in dustproofness, and has a feeling of oppression and a poor feeling of wearing because it is fastened with a rubber string.

[Brief description of the drawings]

FIG. 1 is a plan view for explaining the structure of a cuff portion of a dustproof garment of the present invention, FIG. 2 is a side view showing a state in which the sleeve portion of FIG. 1 is folded along a sleeve length direction, FIG. Is a plan view for explaining the structure of the cuff portion of the dustproof garment according to another embodiment of the present invention,
FIG. 4 is a side view showing a state in which the sleeve of FIG. 3 is folded back along the sleeve length direction.

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁶ Identification code FI D02G 3/32 D02G 3/32 3/38 3/38 D03D 15/08 D03D 15/08 (56) References JP-A-58- 91819 (JP, A) JP-A-62-33806 (JP, A) JP-A-3-64503 (JP, A) JP-A-2-61101 (JP, A) JP-A-3-152237 (JP, A) Japanese Utility Model Showa 61-2413 (JP, U) Japanese Utility Model Showa 62-97116 (JP, U) Japanese Utility Model Showa 61-155318 (JP, U) Japanese Patent Publication Sho 63-60127 (JP, B2) (58) (Int.Cl. ⁶ , DB name) A41D 13/00-13/02 D02G 3 / 32,3 / 38

Claims (2)

(57) [Claims] An overall-type dust-proof garment having a structure in which a collar and a cuff fits a human body is composed of an elastic woven fabric and a non-elastic woven fabric. (A) A covering yarn in which an elastic yarn made of a polyether polyester block copolymer is coated with a polyester filament yarn is used in at least one of the warp and weft directions. (A) Use of the covering yarn stretchability gastric direction, the elongation at the load application of 1.5 kg / 5 cm is in the range 30 to 150% (c) air permeability, satisfies in the range of 1~30cc / cm ² / sec A dustproof garment characterized by using a woven fabric. 2. The dustproof garment according to claim 1, wherein the stretchable woven fabric and the non-stretchable woven fabric have the same dimensions.