JPH03180501A - Dustless clothing - Google Patents

Abstract

PURPOSE:To provide the title clothing consisting of stretchable cloth of good air permeability, with its upper and lower garment parts formed into a unit, high in the area enlargement rate between both left and right sleeve edges or between collar fitting part and the crotch, high in dust generation-preventive effect, thus to be used in e.g. clean rooms. CONSTITUTION:The objective clothing can be obtained by forming the upper and lower garment parts into a unit of overall shape using a stretchable synthetic fiber filamentous cloth with an extensibility of 10-30% in the warp and/or weft direction(s) when loaded at a level of 1.5kg/5cm and an air permeability of >=0.5cc/cm<2>/s at an extension rate of 0%. The objective clothing has an area enlargement rate ranging from 5 to 30% under a load of 1.5kg/5cm at the back between both left and right sleeve edges or between collar fitting part and the crotch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to dust-free clothing, and particularly to dust-free clothing suitable for use in clean rooms.

[Prior Art] In recent years, the degree of integration of semiconductor devices has been increasing in the field of electronics, particularly semiconductors. Such highly integrated semiconductor devices are manufactured in a clean room or the like, and the cleanliness of the clean room is required to be high in proportion to the high degree of integration of the semiconductor devices. In order to maintain a clean room at a high level of cleanliness, one of the important issues is to prevent dust from being generated by workers in the clean room. The second type is dust generated from the worker's body and the underwear worn by the worker, which is transmitted through the dust-free clothing. Thirdly, dust is generated from the worker's body and the underwear worn by the worker, and is dust generated from the openings of clothing (cuffs, hems, etc.).
It is known that there are three types of leaked dust that leaks from around the neck, face, etc.

Conventionally, synthetic fiber filaments without free fiber ends have often been used in such dust-free clothing, and the amount of material dust generated has been reduced to a low level.

In addition, the fabrics used for dust-free clothing have improved dust-catching properties due to higher density or coating treatment, and there are fewer problems with permeable dust.

However, as mentioned above, high-density or coated fabrics have the disadvantage of reduced air permeability. Furthermore, when a worker wears such a low-air permeability fabric, when the worker exercises, air leaks from the openings of the clothing due to fluctuations in the air pressure within the clothing (this phenomenon is referred to as the "bumping effect"), resulting in leakage of dust. To increase.

To solve this problem, the openings in the clothing are reduced or the openings are tightened with a stretchable material such as rubber to prevent air from flowing out of the clothing. but,
Such methods have limitations due to breathing and vocalization, and the problem has not been sufficiently solved.In order to prevent dust leakage due to such a pumping effect, for example, a fan that makes the air pressure inside the clothes negative is used. Dust-proof clothing equipped with a power source has been proposed (Japanese Patent Application Laid-Open No. 62-33806),
The end result of this kind of technical thinking is similar to diving suits and spacesuits, which are equipped with devices that control the air pressure inside the clothing, including breathing equipment, and are clothing that sacrifices workability and comfort. , which is not the intention of the inventors.

Additionally, as a means to prevent leakage of dust due to the bombing effect, it has been proposed to attach an electret sheet-like material to openings of clothing (Utility Model Application No. 61-155).
However, this method also has a small effect because the pressure fluctuations within the garment are large and the rate of air leakage from the openings is high.Furthermore, it is troublesome to process the fibers and fabrics with electret. Moreover, the effect is not durable and the cost of use is high.

[Object of the Invention] The object of the present invention is to solve such conventional problems and prevent the air inside the dust-free clothing from being released into the clean room without restriction, and in particular to prevent the air inside the dust-free clothing from being released into the room from the upper part of the dust-free clothing. The purpose of the present invention is to propose dust-free clothing that is highly effective in preventing dust from being released.

[Structure of the Invention] The present invention provides an overall-type dust-free garment in which an upper garment part and a lower garment part are integrally formed, wherein the dust-free garment is made of a synthetic fiber filament fabric, and the synthetic fiber filament fabric is made of a synthetic fiber filament fabric. At least 61 directions of direction and latitude are 1.5stg1
It is a stretchable fabric that has an elongation rate in the range of 10 to 30% when a load of 5 cm is applied, and has an air permeability of 0.5 CC/aJ /sec or more at an elongation rate of 0%, and weighs 1.5 kg.
The air permeability at the elongation rate equivalent to a load of 15 cs is 2.
0 CC/li/Sec or less, and when a load of 1.5 kg/Scm is applied between the left and right sleeve ends of the dust-free garment, or on the back between the frame attachment part and the crotch base. The dust-free garment is characterized in that the area expansion rate at the back is in the range of 5 to 30%.

The dust-free garment of the present invention is an overall type dust-free garment in which the upper garment part and the lower garment part are integrally formed, and in the case of a dust-free garment in which the upper garment part and the lower garment part are separated, the hem of the upper garment part is This overall-type dust-free clothing is not subject to the present invention because it has large openings and the leakage of dust inside the clothing is large, and the overall air-tightness of the clothing is good and dust-proof. It means being superior in sexuality.

The dust-free garment of the present invention is made of a synthetic fiber filament fabric that does not have free ends of fibers, generates little dust, and has excellent durability in use.The synthetic Mli fiber filament may be made of polyamide, polyester, etc. Clothing fibers are used, and polyester is particularly preferably used from the viewpoints of chemical resistance, ease of handling, and texture.

Further, the fabric needs to be a stretchable fabric with high extensibility in at least one direction, either the warp direction or the weft direction. The extensibility is measured by the elongation when a load of 1.5 kg153 is applied (hereinafter referred to as elongation rate), and the elongation rate of the fabric used in the present invention is in the range of 10 to 30%, preferably 15 to 30%.
It is important that it is in the range of 25%.

If the elongation rate is less than 10%, the shrinkability is insufficient, and the above-mentioned bumping effect cannot be reduced, making it impossible to achieve the effects of the present invention.

In addition, if the elongation rate exceeds 30%, it becomes difficult to control the relationship between the elongation rate of the fabric and the dust-catching property, and in this case, the effects of the present invention cannot be achieved. The elongation rate referred to in the invention is JIS-L-1096-6.
, 14, 1(1)^ method (low speed elongation method).

Furthermore, the fabric has an air permeability of 0.5 at an elongation rate of 0%.
CC/Cl1l/sec or more, and 1.5kg
The air permeability is 20cc/C11 at an elongation rate equivalent to a load of 15an! /sec or less.

Air permeability at 0% elongation is 0.5CC/cd/se
If it is less than c, the humidity inside the clothes will increase rapidly due to poor air permeability, which is not preferable. In addition, the air permeability is 20cc/cm at an elongation rate equivalent to a load of 1.5kt15cm.
If the air permeability exceeds d/sec, the dust collection property will deteriorate and the effects of the present invention cannot be obtained. Measure.

The dust-free garment of the present invention constructed from such a fabric may use fabrics other than those mentioned above as small parts of the dust-free garment. Or, in the back between the collar attachment part and the crotch root, the area expansion rate at the center of the back when a load of 1.5 kg/5 cm is applied to the back part when a load of L5h5,150 is applied. It needs to be in the range of 5 to 30%.

When the area expansion rate is in the range of 5 to 30%, for example, when elongation is applied in one direction, it is preferable that the shrinkage in the direction orthogonal to this is as small as possible. It is preferable that the fabric has a structure that takes advantage of the extensibility of the threads that make up the fabric, and when opened, the warp and weft are made of extensible threads (for example, threads using spandex, etc.).
Suitable examples include fabrics using a crimping system, etc., or fabrics using latent crimped yarns that are scouring and relaxing to reveal crimps.

On the other hand, a fabric that has obtained extensibility by changing the shape of the la structure of the fabric will shrink in a direction perpendicular to the elongation load applied to it in one direction, making it undesirable as a fabric for use in the present invention. For example, in the case of a knitted fabric knitted into a smooth structure, when stretched in one direction, the shape of the stitches constituting the knitted fabric changes and contracts in a direction perpendicular to the stretched direction. In addition, if the fabric is used in the bias direction, it has great elongation in one direction, but it shrinks in the direction perpendicular to this, which is not preferable.Furthermore, the area expansion rate is
The fabric used for the body has great elasticity in the length direction,
The above range can be achieved by combining the elasticity and direction of the fabrics used for the body and sleeves, such as by combining the fabrics used for the sleeves with greater elasticity in the direction of the sleeve length.

The area expansion rate was measured between the left and right sleeve ends of the layer surface, or between the collar attachment part and the crotch root part, with a load of 1.5 kg and 15 cm applied to the back. After marking a square of 103 x 10 square with a stamp etc. near the center, remove the load, leave it for 2 hours, measure the area B(-) of the marked shape, and calculate the area expansion rate A from the following formula.
I asked for

A= (100-B) xlQ (17B [Operation of the Invention] The dust-free garment of the present invention has the above-mentioned configuration, so it has a high dust-collecting effect even though it uses a stretchable fabric.
In addition, it is possible to prevent the air inside the dust-free clothing from being released into the room, and to obtain dust-free clothing that is highly effective in preventing dust generation. In particular, by setting the area expansion ratio within the above range, not only the feeling of wearing comfort is improved, but also the effect of preventing dust generation is obtained.

In other words, in order to satisfy this area expansion rate,
Of course, the elongation rate of the fabric constituting the part must satisfy the above conditions, and if there are seams, the elongation rate including the seams must be satisfied, and the seam type must be chain stitched. It is preferable that the load is applied at the center of the back when a load is applied between the left and right sleeve ends of the dust-free garment, or between the collar attachment and the crotch root. As a result, objects that contract significantly in the direction perpendicular to the
This reduces the area expansion rate, and the effects of the present invention cannot be obtained, that is, the operation when wearing dust-free clothing,
For example, when both arms are bent forward, a stretching force acts between the left and right sleeve ends of the back body, while a contracting force tends to act between the collar and crotch roots of the back trough. Also, when you bend forward and round your back, a stretching force acts between the collar and the root of the crotch in the back valley, and on the other hand, between the left and right sleeve ends of the back body, or A shrinking force tends to act in the direction of the blue line.

Such shrinking force not only causes discomfort when worn, but also increases the amount of air contained within the garment by performing actions such as shifting the contact position of the garment to eliminate this discomfort.
As a result, undesirable results such as increased leakage of dust due to the bombing effect are brought about. However, by setting the area expansion ratio within the range of the present invention, it is possible to prevent the central part of the back from shrinking significantly in the direction of the body length, to make clothes that fit the body as closely as possible, and to reduce leakage of dust due to the bombing effect. You can.

The present invention will be explained below with reference to Examples.

[Example] Polyester filament yarn (75de/3
6f i I) and polyester woolly processed yarn (100de/48f i l) as the weft, weaving with a 3/21 structure with a warp density of 60 threads/cm and a weft density of 46 threads/cm to produce gray fabric. Obtained. By scouring, dyeing, and heat setting the gray fabric according to a standard method, and changing the finished width dimension, the density in the warp direction changes as shown in Table 1.
Six types of fabrics with different elongation rates in the weft direction were obtained. Using the woven fabric, overall-type dust-free clothing No. 1 to No. 6, in which the upper and lower clothing portions were integrally formed, were sewn. The sleeves of the dust-free garment are installed in a set-in type, and the dust-free garment Nα1~
- Nα6 was used so that the warp direction of the fabric matched the length direction of the body, and the warp direction of the fabric was used for the length direction of the sleeves.

Moreover, in Company 2-1, contrary to the above, the weft direction of the fabric was used for the length direction of the body and the length direction of the sleeves. Furthermore, N.Q.
In 2-2, only the back of the back body was biased at 45 degrees, and the rest was the same as No. 2.

Furthermore, the dust-free garment was made so that the bareness of the bare horse was 25%, and finally a dust-free garment was produced. A test was conducted on the concentration of dust leaking from the naked body of the tester wearing the resulting dust-free clothing. The leakage blood and dust floating test was carried out on the above-mentioned 6
A 30-year-old man (wearing cotton underwear) with a length of 165 (2) 9 and a weight of 60 kg was put on a dust-free garment of the same type. 10) The concentration of dust with a particle size of 0.11 μm or larger during arm-swinging walking (120 steps/min) is shown as a value measured with a particle counter.

In addition, for the wear motion dust concentration test, the tester conducted the test in the clean room (@ 66cm x depth 53QIIX height 19cm).
The dust concentration (dust with a particle size of 0.11 μm or more) in the air in the clean room was measured using a particle counter manufactured by Rion (KC-1
It is shown as the value measured in 5).

The test results are shown in Table 1.

(Hereinafter, blank space) Example Nα2, 2-1.3 of the present invention as shown in Table 1
, 4.5 is a dust-free garment with a small bombing effect and a small concentration of dust leaking from the hakama portion, resulting in less dust generation when worn. Compared to the example, l1k which is a comparative example
ll has a small elongation rate, so the bombing effect is large, NO2-2 has a small area expansion rate, so NO3 has an excessively large elongation rate, and the dust collection performance of the fabric is poor, so dust generation is caused by wearing. To a large extent, the purpose of the present invention is not achieved.

Claims (1)

[Claims] In an overall type dust-free garment in which an upper garment part and a lower garment part are integrally formed, the dust-free garment is made of a synthetic fiber filament fabric, and the synthetic fiber filament fabric has at least one of the warp direction and the weft direction. It is a stretchable fabric that has an elongation rate in the range of 10 to 30% when loaded with a load of 1.5 kg/5 cm, and has an air permeability of 0.5 at an elongation rate of 0%.
cc/cm^2/sec or more, 1.5kg/5cm
The air permeability at the elongation rate equivalent to the load applied is 20cc/
cm/sec or less, and the area on the back when a load of 1.5 kg/5 cm is applied between the left and right sleeve ends of the dust-free garment or between the collar attachment part and the crotch base. A dust-free garment characterized by having an enlargement rate in the range of 5 to 30%.