JPH01207405A - Warp knitted dust-proofing clothes - Google Patents

Abstract

PURPOSE:To obtain a knit fabric for dust-proofing clothes having excellent air-permeability and fittability to the body, by knitting a particular knit fabric with ultrafine filaments and electrically conductive organic filaments. CONSTITUTION:A knit fabric having an areal density of 70-180g/m<2> is produced by using a synthetic fiber filament having a single fiber fineness of 0.1-4de and an electrically conductive organic filament having a specific resistance of <=10<6>OMEGA.cm. The content of the electrically conductive organic filament in the knit fabric is 0.1-10wt.% and the air permeability of the fabric is adjusted to 4-30cc/cm<2> by selecting the kind of filament and the texture of the knit fabric. The electrically conductive organic filament can be produced by compounding a polyalkylene glycol or polyalkylene ether glycol and fine carbon powder to a polymer and spinning the composition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a warp-knitted dustproof garment. In more detail, dust-proof clothing is required to prevent dust from adhering to clothing due to static electricity, to prevent dust from being generated from the clothing itself, and to prevent dust generated from the human body from passing through to the outside. The present invention relates to a functional warp-knitted dust-proof garment that has three characteristics as well as improved workability and comfort.

[Conventional technique sardines] In recent years, medical, pharmaceutical, food, electronic equipment, and precision equipment.

As products become more sophisticated in industries such as transportation equipment and film manufacturing, it has become clear that dust in the air has a significant impact on product performance, and dust-proof clothing has become essential in these industries. It has become.

Conventionally, fabrics for dustproof clothing have been exclusively fabrics, especially fabrics with a plain weave structure. In order to achieve the goal of not allowing dust to pass through, it is effective to reduce the amount of air permeability, and high-density fabrics with low air permeability have been used.

[Problems to be Solved by the Invention] However, although dustproof clothing made of high-density fabric has good shape retention, it does not fit well to the body, hinders movement, and has low airflow, making it difficult to wear when worn. Dust-proof clothing is generally said to be uncomfortable to wear, as it causes stuffiness and stickiness.

[Measures for Solving the Problems A] In order to improve comfort while satisfying the required characteristics of dust-proof clothing, the warp-knitted dust-proof clothing of the present invention has the following configuration. That is, a filament with a single yarn fineness of 0.1 to 4 denier and a specific resistance of 1
A warp-knitted dustproof garment comprising organic conductive filaments of 0.6 Ω·cm or less, wherein the content of the organic conductive filaments in the warp-knitted fabric is 0.1 to 10% by weight.

The basis weight of the warp knitted fabric is 70 to 180 g/Tr12. This warp-knitted dustproof garment is characterized in that the warp-knitted fabric has an air permeability of 4 to 30 cc/ri/sec.

In the present invention, the warp knitted fabric is a tricot knitted fabric.

A warp knitted fabric with a multilayer structure is particularly preferable, such as a raschel knitted fabric. When the organic conductive filament described below is black, by arranging the black conductive filament on the inner layer or back side as a multilayer structure, it is possible to provide a dust-proof garment with a good appearance without exposing the black conductive filament to the surface of the knitted fabric. It is from.

In the present invention, a warp knitted fabric is used as a material for dustproof clothing. This is because warp knitted fabrics have a three-dimensional structure compared to woven fabrics, and have more overlapping yarns in the thickness direction, making it possible to achieve both dustproofness and breathability. That is, when the air permeability m is the same, warp knitted fabrics tend to have a larger cover factor than woven fabrics.

Therefore, it has a rich filter effect on dust from inside the dustproof clothing, such as the body and underwear. In terms of a model, dust that tries to fly out in a straight line from the inside of the dustproof garment to the outside collides with the three-dimensional stitches and does not come out smoothly. On the other hand, in the case of textiles, dust tends to fly out linearly from the gaps in the lattice made up of warp and weft yarns. Looking at it from a different perspective, even if the degree of dust permeability is the same, warp knitted fabrics can provide greater airflow than woven fabrics. This is because unlike the straight path of dust, the path of air is not necessarily straight.

Even in knitted fabrics, warp knitted fabrics have great elasticity □
Therefore, when the body, especially the upper and lower limbs, is moved, the amount of ventilation becomes too large locally, and the degree of dust permeability also becomes large, which is undesirable.

Because of the appropriate stretchability of the warp knitted fabric, it is possible to obtain a warp knitted dustproof garment that is both comfortable to wear and satisfies the required characteristics of a dustproof garment.

The basis weight of the warp knitted fabric used in the present invention is 70 to 180 g
/m2. If the fabric weight is less than 70g/Tn2, the strength is too low to be used as clothing, while if the fabric weight exceeds 180g/1712, the texture is hard and heavy, making it difficult for the wearer to move. or be inhibited.

In the present invention, in order to obtain the above basis weight, the density of the warp knitted fabric is such that the wale density of the warp knitted fabric is 36 to 7B/1n.
ch, the course density of the warp knitted fabric is 65-94/1nch
It is preferable that In addition, the wale density of warp knitted fabric,
The organization conditions for setting the course density within the above range are:
It is preferable that the needle density is 28 gauge or more and 40 gauge or less.

The warp knitted fabric used in the present invention must not only have the above-mentioned basis weight, but also have a rough air permeability (2) in the range of 4 to 30 cc10yf/sec. Ventilation strip 4CC/CITF/
If the SeC is not met, stuffiness and stickiness when worn cannot be eliminated. In addition, the ventilation amount is 30cc/c4. /s
If it exceeds ec, it becomes easier for dust to pass through.

As a method for keeping the air permeability ω of the warp knitted fabric used in the present invention within the above range, for example, a warp knitted fabric knitted with the above preferable needle density is dyed and heat set as necessary, and then heat calendered. This can be achieved by applying The conditions for heat calendering to create a ventilation gap that makes it difficult for dust to pass through and prevent stuffiness and stickiness when worn are: roll temperature io~180'C, contact time 20~15
0 seconds and a roll pressure of 2 to 50 ton/m are preferable.

In the present invention, the yarn constituting the warp knitted fabric has a single yarn fineness of 0.
．． 1-4 denier filament and resistivity 106Ω
・Consists of conductive filaments of cm or less. The reason why filaments are used in the present invention is that the amount of dust generated from the fabric itself is extremely small compared to those using spun yarn.

The materials used for the filament include polyamide, polyester, polyolefin, and acrylic. More preferred are antistatic filaments containing dispersed hydrophilic components such as polyalkylene glycol.

The single filament fineness of the filament must be in the range of 0.1 to 4 denier. It is more preferable if it is in the range of 0.5 to 2 denier. If the single yarn fineness is less than 0.1 denier, there is a possibility of single yarn breakage, which is not preferable. Single yarn fineness is 4
If it exceeds the denier, the filter effect will be significantly reduced, which is not preferable.

In addition, as an organic conductive filament, a specific resistance of 106
It needs to have conductivity of Ω·cm or less.

If the specific resistance exceeds 1060 cm, the conductivity is insufficient, so the antistatic effect due to corona discharge is insufficient, and it is not possible to prevent dust from adhering to clothing due to static electricity. In addition, from the standpoint of antistatic effect, the specific resistance does not need to be excessively large, and there is a limit to the range that can be manufactured using organic conductive filaments, so the specific resistance is 10Ω・c.
m or more organic conductive filaments are preferred.

In the present invention, the organic conductive filament refers to a material such as polyamide, polyester, polyolefin, acrylic, etc., containing 15 to 50% by weight (hereinafter referred to as wt%) of conductive fine particles.
) l Refers to filaments that are dispersed and arranged in the fiber axis direction. If this content is too small, sufficient conductivity cannot be obtained, while if it is too large, it becomes difficult to spin yarn, and the I
The mechanical characteristics also deteriorate.

Such organic conductive filaments can be obtained, for example, by uniformly blending a composition of polyalkylene glycol, polyalkylene ether glycol, or their derivatives with carbon fine powder into a polymer or spinning dope before spinning. It will be done. The organic conductive filament can also be produced by composite spinning such as a bimetallic type or a core-sheath type in which one component is a polymer containing the composition uniformly blended or a spinning dope as one component.

The organic conductive filament of the present invention having conductivity with a specific resistance of 10 6 Ω·Cm or less has an excellent antistatic effect due to corona discharge, and also exhibits an excellent electrostatic effect even at low humidity.

The proportion of organic conductive filaments constituting the warp knitted fabric must be 0.1 to 10 wt% with respect to the warp knitted fabric.

If the proportion of the organic conductive filament is 0.1 wt % or less, the antistatic effect due to corona discharge is insufficient, and therefore it is impossible to prevent dust from adhering to clothing due to static electricity. In addition, when the above ratio exceeds 10 wt%, the antistatic effect is almost saturated, but especially when the conductive particles are fine carbon powder, the black color of the organic conductive filament becomes noticeable, and the It becomes impossible to make dustproof clothing.

Incidentally, although the single yarn fineness of the organic conductive filament is generally large, it is preferable to use one having a fineness of 10 deniers or less, preferably 5 deniers or less, so that the filter effect is not impaired.

In the present invention, dustproof clothing refers to dustproof clothing worn alone as outer clothing, as well as dustproof clothing that is worn auxiliary inside the dustproof clothing to improve the dustproof performance of the dustproof clothing worn outside, and to improve the comfort and comfort of the wearer. Includes supplementary dustproof clothing as inner clothing to improve ease of movement. .

Hereinafter, the dustproof clothing of the present invention will be explained in more detail based on Examples.

In addition, the triboelectric charge voltage and triboelectric charge density are JISL10.
94.

Air permeability ω was measured by the Frazier method of JIS L 1096.

The electrical resistivity of the yarn was measured by the following method.

After deoiling the yarn sample with carbon tetrachloride, it was bundled and
It was made into a bundle of 0 denier and cut into a length of 10 cm.

A conductive resin is applied to both ends of this fiber bundle to form electrodes.
The electrical resistance value (Ω) was measured when 100 V DC was applied in an atmosphere of 0°C and 65% RH, and the specific resistance value (Ω cm) was measured.
I suffered from paralysis.

The fabric dust generation opening was measured by the following method.

After cutting the fabric into pieces each measuring 31 x 23cm using a melt cutter, dry-clean it once.
I went around. In a clean room with a cleanliness of 10 particles/cf or less of particles of 0.1 μm or more, the above sample was attached in a cylindrical shape to a Gerbo tester, and the rotation speed was 5 Orpm.
Shaking was performed at a bending angle of 400 degrees and a stroke of 14.7 cm. The suction distance from the bottom of this dust generator is 15d,/mi.
Air was sucked through the sampling tube at n, and fabric dust generation (■) was measured using a laser dust monitor D-1500 (manufactured by Hitachi, Ltd.).

Oil dust collection efficiency was measured by the following method.

After cutting the fabric to a size of 25 cm in diameter using a melt cutter, it was caulked and dry cleaned once. 0
．． In a clean room with a cleanliness level of less than 10 particles/cf of 1 μm or more, 0.1
A tube that supplies air containing about 200,000 particles/cf or more of particles of 7 μm or more is introduced and connected to the laser dust monitor S-1500 mentioned above. Attach the sample to the holder at the inlet of the tube and suck the dust-containing air at a suction wind speed of 0.026 cm/sec, which corresponds to the pressure difference between the inside and outside of normal clothing, to remove the dust before and after attaching the sample. The number was measured using a rail dust monitor TS-1500, and the oil dust collection efficiency F (%) was calculated using the following formula.

The amount of dust generated during operation was measured by the following method.

In a clean room with a cleanliness level of 10 particles/cf or less of particles larger than 0.1 μm, the same subject wears the dust-proof clothing to be measured, and immediately after performing each of the following actions, The number of dust contained in the sampled air was measured.

■Standing upright (1 minute) ■Upper body movement (1 minute) Vertical and horizontal movements of the neck (20 seconds) Twisting of the upper body (20 seconds) Swinging the upper limbs for 20 seconds) ■Lower limb movements (2 minutes) Bending and stretching the knees ( 1 minute) Foot stepping (1 minute) ■ Tapping exercise (1 minute) (clap from chest to thighs with both hands) (Example 1) Polyester composition containing 35 wt% carbon black as core component and polyester as sheath component A tricot knitted fabric was knitted using a 36G warp knitting machine using the prepared core-sheath composite yarn as an organic conductive filament together with polyester filament (30 denier, 24 filaments).

The knitting conditions were such that organic conductive filaments were arranged in one row for every 7 wells, and the proportion of the dominant conductive filaments was 1.8 wt% with respect to the knitted fabric. After dyeing and finishing the obtained knitted fabric, the roll temperature was 165°C and the roll pressure was 30°C.
Thermal calendering was performed under the conditions of ton/m and a contact time of 80 seconds.

The wale density of the warp knitted fabric thus obtained was 73/
1 nch, D-su density is 83/r nch, area weight is 110 (]/m2. Airflow rate is 20 cc/cJ/se
It was c. In addition, the charging voltage of the first dormitory is 2. OkV, triboelectric charge density was 2.6 μC/Tr12.

An overall type dustproof garment is sewn using the above warp knitted fabric,
The characteristics as dustproof clothing were evaluated.

As shown in Table 1, the examples of the present invention are superior in both fabric dust generation amount and dust removal efficiency, even though the ventilation amount is large, compared to the comparative examples described below.

(Comparative Example 1) Antistatic polyester fiber containing 0.5% polyethylene glycol in both warp and weft (100 denier, 36
A plain woven fabric was woven using the organic conductive filaments used in Example 1 as warp yarns at 6 mm intervals and as weft yarns at 7 mm intervals. The proportion of organic conductive filaments was 2.0 wt% based on the fabric. The warp density of this fabric is 112 threads/1nCh, and the weft density is 88
Book/1nCh, basis weight is 95g/m22 ventilation R is 7.5c
c/cJ/sec. Also, the frictional charging voltage is 1.
3 kV, and the triboelectric charge density was 2.2 μC/Tn2.

An overall-type dustproof garment was sewn using the above fabric, and its properties as a dustproof garment were evaluated.

The fabric dust generation amount and oil dust collection efficiency are shown in Table 1 together with Example 1.
It was shown to.

(Margin below) Table 1 (Example 2) When the overall type dustproof clothing of Example 1 was evaluated for comfort, it was found to have excellent fit and ease of movement.
It was a highly functional dustproof garment.

Further, Table 2 shows the evaluation results of the amount of dust generated during operation. Compared to Comparative Example 2 described later, the amount of dust generated during any operation was small.
In particular, the amount of dust generated during the tapping operation was O particles/cf.

(Comparative Example 2) The overall type dustproof clothing of Comparative Example 1 was evaluated for comfort. There were problems with fit and ease of movement. Further, the evaluation results of the amount of dust generated during operation are shown in Table 2 together with those of Example 2. Compared to Example 2, more dust was generated during all operations, and the amount of dust generated during the tapping operation was particularly large.

(Example 3) Using the fabric obtained in Example 1, a training wear type (top: round long sleeve shirt, bottom: tights) was sewn and worn over underwear, and Comparative Example 2 was placed on top of it. The overall dustproof clothing was worn and the dustproof performance was evaluated. Table 2 shows the evaluation results of the amount of dust generated during operation.

Competitive with Comparative Example 2, the amount of dust generated was small in all operations. That is, even when the dust-proof garment of the present invention is used as an auxiliary inside of a conventional dust-proof garment, it can significantly improve dust-proof performance, comfort, and ease of movement.

(Margins below) Table 2 The values in the table are 11m11 (pieces, 'cr) [Effects of the invention] By using a specific warp knitted fabric as the material for dustproof clothing,
It is now possible to provide functional dustproof clothing that maintains the dustproof performance of conventional textile dustproof clothing and has significantly improved fit, ease of movement, and breathability.

Claims (1)

[Claims] (1) A warp-knitted dustproof garment consisting of a filament with a single yarn fineness of 0.1 to 4 deniers and an organic conductive filament with a specific resistance of 10^6 Ω·cm or less, wherein the organic conductive filament in the warp-knitted fabric The warp knitted fabric has a content of 0.1 to 10% by weight, a basis weight of the warp knitted fabric of 70 to 180 g/m^2, and an air permeability of the warp knitted fabric of 4 to 30 cc/cm^2/sec. Warp-knitted dustproof clothing.