JP2003328215A - Dust-free clothing containing recovered polyester and excellent in comfortability for wearing and see-through- preventing property - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide dust-free clothing having an extremely low self dust-generating property, excellent in washing endurance and soft feeling in wearing, keeping humidity in the clothing in wearing in a comfortable area, preventing discomfort in operation, capable of corresponding to an EcoMark-certified product and Law on Promoting Green Purchasing by keeping the sewn product so that the weight of a regenerated polyester used occupies ≥50 wt.% and further having also a see-through preventing property. <P>SOLUTION: The dust-free clothing containing the recovered polyester is sewn by using cloth woven from (A) a polyester filament prepared from a polyester containing the regenerated polyester from a recovered polyester and (B) an electroconductive fiber filament and satisfying requirements of ≥1.5% moisture absorption ratio, ≥3% difference between a degree of moisture absorption and a degree of moisture release and ≤1 sec water absorption rate, ≥70% drying ratio and ≤15.0 sea-through-preventing property and prepared so that a weight ratio of the polyester filament (A) occupies ≥50 wt.% based on total weight of the sewn product and is excellent in comfortability for wearing and sea-through property. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-free garment made of polyester fiber having excellent hygroscopicity, and more specifically, to a global environment using recycled polyester filament containing recycled polyester. The present invention relates to a dust-free garment that is configured to contain recovered polyester, which is excellent in gentle wearing comfort and excellent in transparency.

[0002]

2. Description of the Related Art Wearing work clothes that generate dust has been conventionally unfavorable due to the nature of products when it is used in clean rooms such as precision machinery manufacturing / assembling, food processing, pharmaceutical manufacturing, semiconductor manufacturing, etc. In addition, it is necessary to wear dust-free clothing that does not generate dust and engage in work. However, it is necessary that the dust-free garment does not release sweat and other excrements generated from the body, fiber scraps and dust generated from sebum, keratin and underwear into the work environment, and that it itself does not have self-dusting properties. Is. For this reason, it is difficult to use comfortable cotton, cellulosic fibers, and other natural fibers, and the breathability is poor, and discomfort such as stuffiness and stickiness occurs when worn. Met.

Further, with the recent trend of ecology and active recycling activities, companies are moving to use recycled polyester products that are recycled as fibers after washing, crushing and repelletizing recovered polyester such as PET bottles. It is becoming more active in public bodies and business establishments. Dust-free garments made of recycled PET bottle fibers that comply with the Green Purchasing Law and the Eco Mark certified by the Japan Environment Association are highly demanded by society.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned conventional problems and to provide a dust-free garment which can be comfortably operated without causing discomfort when worn. Is a highly hygroscopic fabric composed of polyester-based multifilament, which has extremely low self-dusting property, excellent washing durability and soft feeling when worn, and comfortable moisture inside clothes when worn It is possible to comply with the Eco Mark and the Green Purchasing Law by keeping it in the area to prevent discomfort during work, and the recycled polyester weight of the sewn product (dust-free garment) accounts for 50% by weight or more. Is to provide a dust-free garment that is also transparent.

[0005]

That is, the present invention has the following constitution. 1. The polyester filament (A) regenerated containing the recovered polyester and the conductive fiber filament (B) are woven and sewn using a cloth satisfying the following requirements (1) to (6). A dust-free garment composed of a recovered polyester having excellent wearing comfort and transparency, characterized in that the weight ratio of A) accounts for 50% by weight or more of the total weight of the sewn product. Moisture absorption rate at 0 ° C, 65% RH environment is 1.5% or more 20 ° C, 65% RH environment and 30 ° C, 95% RH environment has 3% or more difference in moisture absorption and desorption rate. Water absorption rate by wicking method is 1 second or less. The transparency (color difference ΔE) measured by using a color difference meter at a drying rate of 70% or more by air-drying at 20 ° C. and 65% RH for 30 minutes was 15.
0 or less 2. A filament containing the conductive fiber filament (B) is arranged on at least one of the warp and / or the weft, and the arrangement interval of the filament containing the conductive fiber filament (B) is 20 to 40 mm.
17 Dust-free composed of the recovered polyester excellent in wearing comfort and permeation resistance according to the above-mentioned 1 characterized in that the performance after 50 industrial washings by the 103 method satisfies the following requirements (1) to (3): Clothes. Particle generation or more particle size 0.5μm frictional electrification voltage 1kV or less JIS B9923 (tumbling) is 500 / ft ³ · 100c
2. m ² or less, tear strength by pendulum method is 9.8 N or more, tear strength retention rate in the initial stage of washing is 80% or more 3. The polyester filament (A) regenerated containing the recovered polyester contains 1 to 5% by weight of a matting agent, and the recovery is excellent in wearing comfort and anti-transmission property as described in the above 1 or 2. Dust-free clothing composed of polyester. 4. Vinyl carboxylic acid and / or vinyl sulfonic acid, and at least one divinyl monomer or trivinyl monomer selected from the general formulas (1), (2), (3) and (4) and a polymerization initiator A carboxylic acid monomer and / or a vinyl sulfonic acid monomer and a divinyl monomer or a trivinyl monomer are attached to the fiber surface layer in a weight ratio of 1: 1 to 1:10. 5. A dust-free garment comprising the recovered polyester excellent in wearing comfort and permeation resistance according to any one of 1.

[Chemical 2] 5. Using a reactive polyurethane binder as a nucleating agent for the coating layer on the fiber surface layer, vinylcarboxylic acid monomer and / or vinylsulfonic acid monomer, the general formula (1),
At least one kind of divinyl monomer or trivinyl monomer selected from (2), (3) and (4) is formed into a crosslinked film through an oxazoline-based or aziridine-based crosslinking agent. A dust-free garment comprising the recovered polyester according to any one of the fourth items, which is excellent in wearing comfort and transparency.

The fabric used for the dust-free garment of the present invention is 20 ° C., 6
The moisture absorption rate in a 5% RH environment is preferably 1.5% or more, more preferably 2.0% or more, still more preferably 2.5% or more. If the hygroscopicity is less than 1.5%, it is not preferable because even if the user wears the dust-free garment in a clean room and works, high hygroscopicity cannot be realized. Further, the upper limit of the moisture absorption rate is not particularly specified, but if the hygroscopicity becomes too high, it becomes difficult to dry, and it becomes preferable that the generation of mold, the feeling of weight when worn, and the clinging are felt. I can not say. It is preferable to keep the moisture absorption rate to about 10%.

[0007] Also, 20 ℃, 65% RH environment and 30 ℃, 9
The moisture absorption / release humidity difference in a 5% RH environment is preferably 3% or more, and more preferably 5% or more. 2 here
0 ° C, 65% RH environment indicates the standard environment of outside air, 30
The environment of 90 ° C. and 95% RH indicates the environment of the air existing between the dust-free clothing and the skin (environment inside clothing). If the moisture absorption / desorption difference is less than 3%, it is not preferable because the sensation of "absorbing and releasing moisture (perspiration)" cannot be obtained during actual wear, and the skin feels dry.

The water absorption rate of the cloth used for the dust-free garment of the present invention is preferably 1 second or less by the wicking method. More preferably, it is 0.8 seconds or less. The water absorption rate is a measure of how water droplets diffuse to the surface and inside of the fabric, and if it exceeds 1 second, the water droplets may easily scatter on the floor or other work environment and cause an unexpected big accident. It is not preferable because it exists. Further, the slower the water absorption rate is, the longer the feeling of wetness on the skin surface is maintained, and it is not preferable because the work clothes (dust-free clothes) are not comfortable to wear. The water absorption rate can be increased by improving the capillary phenomenon of the fiber and the wettability of the fiber surface.

As for the quick-drying property, 20 ° C. and 65% R
The drying rate is preferably 70% or more, and more preferably 80% or more, when air-dried for 30 minutes in an H environment. When actually worn, the degree of dryness will vary depending on factors such as the temperature and humidity of the environment, air movement, heat transfer from the skin, etc.
Drying rate is 7 after air-drying for 30 minutes at 65 ℃ and 65% RH.
If it is less than 0%, the water-absorbing / perspirating water-holding capacity is too high, and it becomes moist forever, causing sticking to the skin and deterioration of exercise performance accompanying it, and work efficiency and wearing feeling are significantly impaired. Therefore, it is not preferable.
Although the upper limit value is not particularly limited, as the drying rate becomes closer to 100%, the quick-drying property is improved, so that a smooth touch can be obtained forever.

Regarding the transparency, it is preferable that the transparency (color difference ΔE) is 15.0 or less, more preferably 13.0 or less, still more preferably 1 by evaluation using a color difference meter.
It is 0.0 or less. The evaluation method will be described later, but the transmission color of one fabric cloth and one cloth fabric (8 sheets) is measured and evaluated as a color difference, and the color difference ΔE is 15.
If it exceeds 0, the fabric has insufficient transparency, and it is not preferable because it is necessary to sew using a lining or the like to prevent see-through or to wear clothes for preventing see-through on underwear. The former may lead to an increase in product price, and the latter may cause deterioration of workability and new dust generation.

The content of the matting agent contained in the polyester filament (A) which is regenerated containing the recovered polyester is preferably 1 to 5% by weight, more preferably 1 to 3% by weight. Examples of the matting agent include inorganic fine particles such as silicon dioxide, titanium dioxide, and barium sulfate, and the particle diameters thereof are not particularly limited, and those other than those that significantly impair the spinning operability can be used. is there. In addition to a single compound, for example, a material coated with aluminum oxide or the like for suppressing the activity of the particle surface is also preferably used. When the content of the matting agent is less than 1% by weight, the visible light transmittance when worn is high, and the resulting garment is difficult to satisfy the transparency, which is not preferable. When the content of the matting agent is more than 5% by weight, segregation of the matting agent during melt-spinning tends to cause yarn breakage and friction damage of guides, which makes stable production difficult and also increases the occurrence rate of abnormal yarn. Therefore, it is not preferable.

The antistatic property is preferably 1 KV or less, more preferably 0.7 KV or less, still more preferably 0.5 KV, as measured by friction electrification voltage after 50 industrial washings.
It is preferable to maintain the following properties in terms of the characteristics of the dust-free garment.
If the frictional electrification voltage exceeds the range of 1 KV, dust in the air will be easily adsorbed, and in a workplace using a volatile organic solvent or the like, it may cause ignition due to static electricity, which is not preferable in terms of work. Furthermore, the feeling of wearing is not preferable, and it causes mental distress.

The amount of dust generated after 50 times of washing is 500 pieces / ft ³ · 100 cm ² or less, more preferably 10
The range is 0 to 350 pieces / ft ³ · 100 cm ² . In the food / medicine field, precision machinery manufacturing field, other machinery, chemical field, etc.
In the ultra-clean field of less than 00 pieces / ft ³ · 100 cm ² , process mechanization has progressed, and it has disappeared in the field where humans directly work. The production cost and cleaning cost of dust-free garments are relatively high, and the cost of obtaining excessive performance is significant.
Further, in a region exceeding 500 pieces / ft ³ · 100 cm ² , the amount of dust generated is too large, so that the yield of production products is deteriorated and foreign matter is likely to be mixed.

With respect to the dust-free garment of the present invention or the cloth used for the dust-free garment of the present invention, the tear strength after 50 industrial washings is preferably 9.8 N or more, more preferably 1.
It is 5.0N or more. If the tear strength is less than 9.8 N, it is not preferable when worn as a dust-free garment or work clothes, especially because the bending parts such as elbows and knees are accompanied by a large deformation of the fabric, which easily tears and is difficult to put into practical use. . The larger the tear strength is, the more desirable it is, but it is not preferable to use the fiber whose dyeability is extremely poor because the tear strength is increased.

With respect to the retention of tear strength after washing, the retention after 50 times of washing with respect to the initial stage is preferably 80% or more, more preferably 85% or more. The washing treatment is performed according to the method of JIS L-0217 103, and the strength of the fabric and the sewn portion decreases as the washing is repeated, but the tear strength retention ratio after 50 times of washing is If it is less than 80%, the strength is significantly reduced with respect to the initial performance, which is not practically preferable.

In the present invention, vinyl carboxylic acid and / or vinyl sulfonic acid, and general formulas (1), (2), (3) and
A processing agent comprising at least one kind of divinyl monomer or trivinyl monomer selected from (4) and a polymerization initiator is applied to the fiber surface by a method such as a pad steam method. Vinylcarboxylic acid and / or vinyl The sulfonic acid monomer and the divinyl monomer or trivinyl monomer are preferably attached to the fiber surface layer in a ratio of 1: 1 to 1:10.

[Chemical 3]

Regarding the weight fraction of the vinylcarboxylic acid and / or vinylsulfonic acid monomer and the divinyl monomer or trivinyl monomer attached to the surface layer of the fiber, when the amount of the latter is less than 1 time that of the former, the carboxylic acid or sulfonic acid terminal is terminated. Since the end group substitution treatment with a strong alkali is carried out for the substitution of the alkali metal or alkaline earth metal, the yellowing of the cloth and the influence on the skin (rash, roughening, etc.) are unfavorable. On the other hand, when the amount of the latter is 10 times or more that of the former, the film strength becomes too small, which is not preferable because the washing durability is deteriorated.

In order to make the surface of hydrophobic fibers such as polyester hydrophilic, various graft polymerization prescriptions have been known, and as a method for initiating radical polymerization, ultraviolet ray, electron beam,
In addition, a method using radiation and a method using an initiator are also known. However, the method using radiation or the like has great restrictions in terms of working environment and apparatus, and it is desirable to adopt the latter initiator method. The initiator is not particularly limited, but is preferably one applied in a low to medium temperature range, that is, about -10 to 100 ° C, and an inorganic polymerization initiator such as ammonium persulfate, potassium persulfate, or ammonium sulfate or 2 , 2'-azobis (2
-Aminopropane) dihydrochloride, 2,2'-
Examples of organic polymerization initiators such as azobis (N, N'-dimethyleneisobutylamidine) dihydrochloride and 2- (carbamoylazo) isobutyronitrile are inorganic initiators because of their cost and ease of handling. Is preferably used.

Further, the radical polymerization initiator is generally a compound having a bond (relatively small bond dissociation energy is small) in the molecule which is relatively weak to heat, and it is said that a compound which is decomposed by heating to easily form a radical is desirable. There is. The addition amount of the radical polymerization initiator is not particularly limited, but preferably 0.1 to 3.0% by weight in the processing agent,
If it is less than 0.1% by weight, the radical polymerization reaction remains insufficient, and if it exceeds 3.0% by weight, it is disadvantageous in terms of cost, which is not preferable.

Examples of methods for applying a processing agent comprising a polymerization initiator, a cross-linking agent, and a monomer serving as a base for graft polymerization to a cloth include a roller padding method, a spray method, a dye exhaustion method, and the like. It can be said that performing high-pressure steaming after roller padding to promote graft polymerization is very effective even when considering the process speed, cost, and quality in a continuous process. The high-pressure steaming prevents the evaporation of the monomer and prevents the polymerization efficiency from decreasing.
It is desirable to adjust the temperature so that the residence time in the process does not become excessively long under the condition of ℃, preferably 95 to 120 ℃. It is also preferable to use high-frequency heating in combination with the above-mentioned steaming in order to suppress heating efficiency and resin migration in the processing agent.

The above-mentioned processing agent is formulated in order to make the surface of the fiber hydrophilic, and a hydrophilic resin film layer is formed on the surface of the fiber. A monomer that can serve as a nucleating agent in order to make the resin film layer stronger, Is more effective.
As the agent capable of becoming a nucleating agent, a reactive polyurethane resin is desirable, and examples thereof include Superflex and Elastron manufactured by Daiichi Kogyo Seiyaku Co., Ltd. Further, in order to further strengthen the resin film layer, it is preferable to use a polyfunctional crosslinking agent to form three-dimensional crosslinking, and an oxazoline-based or aziridine-based crosslinking agent represented by the following strengthens the film strength. It is effective above and is preferably used.

[Chemical 4]

Further, in order to improve the water dispersibility of the processing agent, it is preferable to uniformly emulsify and disperse the hydrophobic component. In particular, acrylic acid and methacrylic acid components have poor water dispersibility, and it is preferable to use an emulsifying dispersant to uniformly disperse them in the processing liquid. Further, after padding with a processing agent and steam treatment for promoting surface graft polymerization, introduction of an alkali metal or alkaline earth metal into the acid terminal (chlorination) is carried out by passing through an aqueous solution of soda ash or caustic soda. After acid-terminated chlorination, washing with water is sufficiently performed to remove unnecessary alkali components. After passing through a weakly acidic aqueous solution such as succinic acid, citric acid, malic acid, etc., repeated washing with water neutralizes and removes the excess alkali components.However, when a strong acid is passed through, the acid end is again removed from the alkali metal or alkaline earth metal. Since it is replaced by hydrogen and the water absorption / moisture absorption function decreases, it is necessary to adjust the hydrogen ion concentration (pH) of the weakly acidic aqueous solution, and adjust the fabric pH after treatment to about 4.5 to 9.0. Is desirable.

Further, in order to make the acid-terminated alkaline chlorination of acrylic acid or methacrylic acid milder, the prescription amount of acrylic acid or methacrylic acid is kept small, and a large amount of hydrophilic divinyl monomer or hydrophilic trivinyl monomer is copolymerized. Preferably. The hydrophilic divinyl monomer or hydrophilic trivinyl monomer has a larger number of added moles of the hydrophilic group-containing compound such as ethylene oxide,
Water dispersibility and moisture absorption / water absorption when processed into a fabric are improved, which is preferable.

To reduce the frictional electrification voltage, some improvement can be made by making the surface of the fiber hydrophilic so as to improve the conductivity. However, the conductive fiber filament itself or other filaments may be mixed, twisted, covered, It is also preferable to positively remove the static electricity charged by weaving after compounding by means such as fiber mixing. In conventional polyester-based fabrics, the frictional electrification voltage becomes too large, so the conductive yarn was woven in a stripe or check shape at a fine pitch.However, the conductive yarn itself is colored, which makes it unattractive and the conductive yarn itself. It was expensive. Moreover, in order to maintain a high antistatic effect, it was necessary to arrange the conductive yarn intervals at a pitch of 2 to 20 mm.

In the present invention, since the surface of the cloth is made hydrophilic,
Since the cloth itself is less likely to be charged, the conductive fiber filament arrangement can be set to 20 to 40 mm, which is larger than the conventional arrangement, and more preferably 20 to 30 mm. When the pitch of the conductive fiber filaments exceeds 40 mm, there is a high possibility that adverse effects such as dust adhesion and deterioration of comfort will occur in an environment where charging is likely to occur, depending on the work environment. Further, if it is less than 20 mm, not only does the appearance look the same as that of a commercially available dust-free garment, but also the amount of conductive fiber filaments increases the cost of the fabric, which is not preferable. Further, since the conductive fiber filament is weak in strength, it is desirable to widen the pitch in terms of mechanical performance such as tear strength to reduce the number of conductive fiber filaments used.

The dust-free garment of the present invention is a polyester filament (A) which is regenerated by containing recovered polyester,
It is desirable that the fabric is sewn using a fabric woven containing the conductive fiber filament (B), and the weight ratio of the polyester filament (A) occupies 50% by weight or more of the total weight of the sewn product. For the Eco Mark certified by the Japan Environment Association, the recovered polyester is 50% by weight of the total weight.
It is necessary to occupy the above. The weight ratio of the polyester filament (A) is 50% by weight of the total weight of the sewn product.
There is no particular problem in using other polyester-based synthetic fiber filaments containing no recovered polyester within the above range. Such other polyester-based synthetic fiber filaments include polyethylene terephthalate,
In addition to homopolymers such as polytrimethylene terephthalate and polybutylene terephthalate, they can be produced by melt spinning a blend polymer or a copolymer having these as main constituent units. If necessary, inorganic fine particles such as titanium dioxide, barium sulfate, silicon dioxide, and kaolinite may be contained to reduce the gloss, and pigments, carbon black, and the like may be contained to form a spun yarn. Further, other antioxidants, stabilizers, antistatic agents, etc. may be contained.

When other polyester-based synthetic fiber filaments not containing the above-mentioned recovered polyester are mixed, as a mixing method, there are mixed yarn with conductive fiber filaments, combined twist, covering and mixed fiber, and warp or weaving. Sometimes it can be used as a mixture. In order to improve the permeation resistance of the cloth and the dust-free garment, it is preferable that the other polyester-based synthetic fiber filaments not containing the recovered polyester also contain a matting agent.

The cross-sectional shape of the fiber is not particularly limited, and a triangular cross-section, a flat cross-section, other polygonal cross-section, and an irregular cross-section can be used in addition to the round cross-section. In addition to the solid cross section, a hollow cross section may be used. The fiber cross section does not have to be uniform, and may have a form in which a plurality of types of yarns of different cross section are mixed, and the fineness does not need to be uniform and may be a mixed fineness.

The form of the polyester filaments used in the polyester dust-free garment of the present invention may be flat yarn without crimps, crimped false twisted yarns, high pressure fluid entanglement treatment or high pressure. It may be an air-processed yarn that has been subjected to a fluid disturbing treatment, and may be appropriately selected according to the application and the texture. If necessary, a known twisting device may be used to twist the yarn. In particular, the number of twists is not specified, but the twist coefficient K calculated by the following formula is 500.
A sweet twist region of ˜3000, preferably 600 to 2500 is suitably used. K = Tw × (D × 0.90) ^1/2 where K is the twist coefficient, D is the total fineness of polyester filaments (d
tex) and Tw represent the number of twists per 1 m (turns / m).

The weaving machine for weaving the cloth used for the dust-free garment of the present invention is not particularly limited, and weaving using a known weaving machine such as an air jet loom, a water jet loom, a rapier room or a projectile room. You can do it. The woven structure is not particularly limited, and can be woven with a known structure such as plain weave, twill weave, satin weave, and the like. A dust-free garment must have a filter property that does not scatter dust or the like generated from the skin or underwear into the air, and it must have a structure that can sufficiently withstand surface abrasion as work clothes. 1 or 3/2, 2/2 twill weave is particularly preferably employed.

The total fineness and the single yarn fineness of the polyester filaments contained in the cloth used for the dust-free garment of the present invention are not particularly limited, but the total fineness suitable as the dust-free garment is about 50 to 400. Decitex,
It is more preferably 80 to 250 decitex, and a suitable single yarn fineness is in the range of 0.3 to 10 decitex, and more preferably 0.5 to 5 decitex.

The dust-free garment is manufactured by sewing the above-mentioned cloth, and it is desirable that the cutting is laser cutting or melt cutting in order to suppress self-dusting. Ordinary mechanical cutting is not preferable because it may cause dust generation due to the action of the yarn forming the fabric falling off the end face of the fabric. In addition, it is desirable to reduce the dust generation factor by using one-sided stitching or piping so that the end face of the fabric is not exposed. The dust-free garment of the present invention includes not only the main body of work clothes (one-piece, two-piece), but also face cover masks, gloves, hoods, hats, shoe surface materials and other accessory sewing products.

[0033]

The present invention will be described in more detail with reference to the following examples. The characteristic values and the physical property values described in the text and in the examples are evaluated based on the following measuring methods.

(Hygroscopicity) The moisture absorption rate H was calculated based on the following relational expression. H = {(H1-H0) / H0} × 100 (%) Here, H0 is the absolute dry weight of the sample (fabric), and represents the weight after drying the sample at 120 ° C. for 3 hours. Also
H1 is the moisture absorption weight of the sample (fabric), which is the weight after the above drying and then leaving it in a predetermined temperature and humidity atmosphere for 6 hours or more to adjust the humidity. The temperature and humidity atmosphere is 30 ° C, which corresponds to the climate in clothes, 95% RH and 20 ° C, which corresponds to the outside air,
Two types, 65% RH, were set.

(Moisture absorption / release property) It is represented by the difference in the amount of moisture absorption between the environment of 20 ° C. and 65% RH and the environment of 30 ° C. and 95% RH. The calculation formula is as follows, and the average value of 5 times of experiments was used as the measured value. Moisture absorption and desorption = (Rate of weight increase when left in an environment of 30 ° C. × 95% RH for 24 hours) − (Rate of weight increase when left in an environment of 20 ° C. × 60% RH for 24 hours)

(Water absorption) JIS L-1096 6-26-
It evaluated by the method according to 1 A method (dropping method).

(Permeability) Color difference meter TC150 manufactured by Tokyo Denshoku Co., Ltd.
The color difference ΔE is measured by the following procedure using 0MC88 type.
Figured out. The measurement was performed 5 times each, and the average value of ΔE was calculated. I. A black mount was attached to the back of the test cloth (one piece of cloth), and color measurement (L * a * b *) was performed. B. Eight test cloths were piled up, and the color was measured (L * a * b *) in a state in which it was not transparent at all. C. The color difference (ΔE) was calculated from the colorimetric results of a and b to evaluate the transparency. However, the color difference ΔE is calculated by the following formula. ΔE = {(ΔL *) ² + (Δa *) ² + (Δb *) ² } ^1/2

(Quick-drying) The sample dipped in water was spread on blotter paper or filter paper to remove excess water, and then the sample was weighed (X (g)), and the sample was weighed at 20 ° C. and 65% RH for 30 minutes. The sample was weighed (Y (g)) after being hung and dried for a minute, and the quick-drying property of the dough was evaluated according to the following mathematical formula. The characteristic value was defined as the average value of 5 measurements. Drying rate (%) = {(X−Y) / (X−Z)} × 100 where Z represents the absolute dry weight (g) of the sample.

(Antistatic property) According to JIS L-1094, 20 ° C
The friction electrification voltage in a 40% RH environment was evaluated.

(Dust generation amount) JIS B-9923 (Dust generation device:
According to the tumbling method), a light scattering type automatic particle coefficient device (method according to JIS B-9921) is used, and washing 50
The dust generation amount (particles / ft ³ · 100 cm ² ) of particles having a particle diameter of 0.5 μm or more for the sample after the rotation was evaluated.

(Tear strength) JIS L-1096 8-15
It was evaluated by a method according to the −5 D method (Pendulum method).

(Washing method) Washing was carried out according to JIS L-0217 method 103. For repeated washing, wash process 1
Air-dried by hanging each time, standard number of washing (50 times)
Was processed.

(Sensory Evaluation of Wearing Dustless Clothes) Ten workers were asked to wear sewn products in a clean room (20 ° C., 40% RH environment). Is strong) and accumulate the results,
The average value was calculated and a comprehensive evaluation of ◎ to × was performed. (◎ =
Particularly good, ○ = pass, × = fail)

Example 1 A recovered PET bottle was crushed and washed, then melted and filtered to remove impurities, and 2.0% by weight of anatase type titanium dioxide was kneaded and re-pelletized.
Using the pellets, a regenerated polyester semi-dual round cross-section 84 decitex 24 filaments were obtained by a known melt spinning method, and a known twisting machine was used to make 250 twists in the S twisting direction.
m twisted yarns were inserted. The twisted yarn and polyester white conductive yarn 28 decitex 2 filament and polyester semi-dual multifilament false twisted yarn (DTY) 84
Decitex 36 filament composite yarn (Z twist 200
The warp of the woven fabric was obtained by warping at a rate of 135 yarns / m). (The distance between the conductive threads of the finishing fabric is 2
1.6 mm. )

The weft yarn is polyester semi-dal multi-filament multifilament 167 decitex 48 filament.
(A) and two recycled polyester filaments used as warp threads are combined to form one 167 decitex yarn.
Book: Wefting was carried out at a ratio of 1: 1 and was woven into a 3/2 twill structure using a water jet loom. The weight of fibers made of the recovered polyester of the cloth accounts for 72% by weight of the total weight of the cloth. This cloth was subjected to continuous scouring relaxation, presetting and back-side calendering with a plast calender by known methods, and then dyed with a disperse dye. (The weight of the recovered polyester fiber is 72% of the total weight of the fabric.
Account for weight percent. )

The dyed cloth was padded with 30% by weight of a chemical solution (aqueous dispersion) according to the following formulation in a dry state, preheated at 100 ° C. to suppress resin migration, and then steamed at 110 ° C. Was applied. (Chemical solution formulation) BPE30 manufactured by Daiichi Kogyo Seiyaku Co., Ltd .; 23 wt% (Chemical formula (2)) Methacrylic acid (special grade reagent); 10 wt% Superflex R5000 (Reactive urethane resin) manufactured by Daiichi Kogyo Co., Ltd .; 7 wt% Kitahiro Chemical NOVEL TD-888 (penetrant); 5 wt% sodium persooxodisulfate (reagent, polymerization initiator);
1.7wt% Epocros W700 (oxazoline type cross-linking agent) manufactured by Nippon Shokubai Co., Ltd .; 7wt% Hitenol NF13 (dispersant) manufactured by Daiichi Kogyo Co., Ltd .; 7wt% After that, 70% using soda ash (10wt% per fiber weight)
Sodium chloride was carried out for 10 minutes, followed by washing with water and drying. The resulting fabric had a transparency resistance (ΔE) of 9.40.

The fabric thus obtained had a moisture absorption rate of 2.1% in a 65% RH environment at 20 ° C., a drying rate of 86%, a moisture absorption / desorption difference of 4.3%, and a water absorption rate of 0.2 according to a wicking method. Seconds, the dispersibility of the processing agent dispersion was good, and the processing was easy. The tear strength of the processed cloth by the Pendulum method is 1
It was 9.5 N (initial value of washing), and a one-piece dust-free garment was sewn using the processed cloth. Frictional electrification voltage after industrial washing 50 times is 350V, dust generation amount is 250 pieces / ft ³ · 100 cm
² , the tear strength by the Pendulum method was 16.3 N (strength retention rate 83.6% relative to the initial value). Worker 1
Questionnaire about feeling of wearing no-garments to 0 people (sensory evaluation)
And the results are summarized in Table 1. Compared with conventional polyester dust-free garments, the wearing comfort was improved, and a comfortable dust-free garment without stickiness or stuffiness was obtained.

(Example 2) Using the dyed cloth obtained in Example 1, 30% by weight of a chemical liquid (aqueous dispersion liquid) according to the following formulation was padded in a dry state, and 100 ° C was used for suppressing resin migration. After performing the preheating of
It was subjected to steam treatment at ° C. (Chemical liquid prescription) TMP24 manufactured by Daiichi Kogyo Seiyaku Co., Ltd .; 23 wt% (Chemical formula (4)) Methacrylic acid (special grade reagent); 10 wt% Superflex R5000 (Reactive urethane resin) manufactured by Daiichi Kogyo Co., Ltd .; 7 wt% Kitahiro Chemical NOVEL TD-888 (penetrant); 5 wt% sodium persooxodisulfate (reagent, polymerization initiator);
1.7wt% Epocros W700 (oxazoline type cross-linking agent) manufactured by Nippon Shokubai Co., Ltd .; 7wt% Hitenol NF13 (dispersant) manufactured by Daiichi Kogyo Co., Ltd .; 7wt% After that, 70% using soda ash (10wt% per fiber weight)
Sodium chloride was carried out for 10 minutes, followed by washing with water and drying. The resulting fabric had a transparency resistance (ΔE) of 9.55.

The fabric thus obtained had a moisture absorption rate of 1.9% in a 65% RH environment at 20 ° C., a drying rate of 81%, a moisture absorption / desorption difference of 3.8%, and a water absorption rate of 0.6 by a wicking method. Seconds, the dispersibility of the processing agent dispersion was good, and the processing was easy. The tear strength of the processed cloth measured by the pendulum method was 21.5 N (initial value of washing). A one-piece dust-free garment was sewn using the processed cloth. After 50 industrial washings, the frictional electrification voltage is 500V and the amount of dust is 360 pieces / ft ³ · 100.
cm ² , tear strength by pendulum method is 18.5 N
(The strength retention rate with respect to the initial value was 86.0%). A questionnaire (sensory evaluation) was asked to 10 workers about the feeling of wearing a dust-free garment, and the results are summarized in Table 1. Compared with conventional polyester dust-free garments, the wearing comfort was improved, and a comfortable dust-free garment without stickiness or stuffiness was obtained.

(Example 3) Using the dyed cloth obtained in Example 1, 30% by weight of a chemical liquid (aqueous dispersion liquid) having the following formulation was padded in a dry state to 100 ° C in order to suppress resin migration. After performing the preheating of
It was subjected to steam treatment at ° C. (Chemical liquid formulation) TMP24 by Daiichi Kogyo Seiyaku Co., Ltd .; 30wt% (Chemical formula (4)) Methacrylic acid (special grade reagent); 3wt% Superflex R5000 (Reactive urethane resin) by Daiichi Kogyo Co., Ltd .; 7wt% Kitahiro Chemical NOVEL TD-888 (penetrant); 5 wt% sodium persooxodisulfate (reagent, polymerization initiator);
1.7wt% Epocros W700 (oxazoline type cross-linking agent) manufactured by Nippon Shokubai Co., Ltd .; 7wt% Hitenol NF13 (dispersant) manufactured by Daiichi Kogyo Co., Ltd .; 7wt% After that, 70% using soda ash (10wt% per fiber weight)
× 10 minutes sodium chloride was carried out, followed by washing with water and drying.
The resulting fabric had a transparency resistance (ΔE) of 9.70.

The fabric thus obtained had a moisture absorption rate of 1.8% in a 65% RH environment at 20 ° C., a drying rate of 74%, a moisture absorption / desorption difference of 3.4%, and a water absorption rate of 0.8 according to the wicking method. Seconds, the dispersibility of the processing agent dispersion was good, and the processing was easy. The tear strength of the processed cloth measured by the pendulum method was 22.5 N (initial value of washing). A one-piece dust-free garment was sewn using the processed cloth. Frictional electrification voltage after industrial washing 50 times is 780V, dust generation amount is 470 pieces / ft ³ · 100
cm ² , tear strength by pendulum method is 19.5 N
(The strength retention rate with respect to the initial value was 86.7%). A questionnaire (sensory evaluation) was asked to 10 workers about the feeling of wearing a dust-free garment, and the results are summarized in Table 1. Compared with conventional polyester dust-free garments, the wearing comfort was improved, and a comfortable dust-free garment without stickiness or stuffiness was obtained.

Comparative Example 1 Using the dyed cloth obtained in Example 1, 30% by weight of a chemical solution (aqueous dispersion) having the following formulation was padded in a dry state to 100 ° C. in order to suppress resin migration. After performing the preheating of
It was subjected to steam treatment at ° C. (Medicine solution prescription) Methacrylic acid (special grade reagent); 30wt% Superflex R5000 (reactive urethane resin) made by Dai-ichi Kogyo Co., Ltd .; 7wt% Noval TD-888 (penetrant) made by Kitahiro Chemical Co., Ltd .; 5wt% sodium persooxodisulfate (reagent) , A polymerization initiator);
1.7wt% Epocros W700 (oxazoline type cross-linking agent) manufactured by Nippon Shokubai Co., Ltd .; 7wt% Hitenol NF13 (dispersant) manufactured by Daiichi Kogyo Co., Ltd .; 7wt% After that, 70% using soda ash (10wt% per fiber weight)
Sodium chloride was carried out for 10 minutes, followed by washing with water and drying. The resulting fabric had a transparency resistance (ΔE) of 9.72.

The fabric thus obtained had a moisture absorption rate of 0.9% in a 65% RH environment at 20 ° C., a drying rate of 65%, a moisture absorption / desorption difference of 2.2%, and a water absorption rate of 1.4 by a wicking method. It was seconds. The tear strength of the processed cloth by the pendulum method was 23.0 N (initial value of washing). A one-piece dust-free garment was sewn using the processed cloth. Friction band voltage after industrial washing 50 times 980V, dust amount of 630 pieces / ft ³ · 1
00 cm ² , tear strength by pendulum method is 19.1
It was N (strength retention rate 83.0% with respect to the initial value).
A questionnaire (sensory evaluation) was asked to 10 workers about the feeling of wearing a dust-free garment, and the results are summarized in Table 1. Like conventional polyester dust-free garments, it felt stuffy and sticky when worn, and was not comfortable to wear.

(Comparative Example 2) Using the dyed cloth obtained in Example 1, 30% by weight of a chemical liquid (aqueous dispersion liquid) having the following formulation was padded in a dry state, and 100 ° C. was used for suppressing resin migration. After performing the preheating of
It was subjected to steam treatment at ° C. (Medicine solution prescription) PEM200 manufactured by Daiichi Kogyo Seiyaku Co., Ltd .; 30 wt% methacrylic acid (special grade of reagent); 3 wt% Nobel TD-888 (permeation agent) manufactured by Kitahiro Chemical Co., Ltd .; 5 wt% sodium persooxodisulfate (reagent, polymerization initiator);
1.7wt% Epocros W700 (oxazoline type cross-linking agent) manufactured by Nippon Shokubai Co., Ltd .; 7wt% Hitenol NF13 (dispersant) manufactured by Daiichi Kogyo Co., Ltd .; 7wt% After that, 70% using soda ash (10wt% per fiber weight)
Sodium chloride was carried out for 10 minutes, followed by washing with water and drying. The resulting fabric had a transparency resistance (ΔE) of 9.78.

The fabric thus obtained had a moisture absorption rate of 0.6% in a 65% RH environment at 20 ° C., a drying rate of 59%, a moisture absorption / desorption difference of 1.5%, and a water absorption rate of 2. according to a wicking method. 5
It was seconds. The tear strength of the processed cloth measured by the pendulum method was 22.8 N (initial value of washing). The dispersibility of the processing agent dispersion was very poor, the processing was difficult, and the fabric could not be finished to a quality for practical use (sensory evaluation could not be performed). The friction charge voltage after 50 industrial washings is 1
350V, dust generation amount 890 pieces / ft ³ · 100 cm ² , tear strength by pendulum method is 18.7N (strength retention rate 82.0% against initial value), and both friction electrification voltage and dust generation amount are high. It was shown and did not satisfy the requirements as a dust-free garment.

Table 1 shows the results of a wearing questionnaire (sensory evaluation) of a sewn dust-free garment.

[0057]

[Table 1]

[0058]

According to the present invention, the self-dusting property is extremely low, the washing durability and the soft feeling when worn are excellent, the humidity in the clothes when worn is kept in a comfortable area, and there is no discomfort during work. It is possible to obtain a dust-free garment, and it is possible to improve the working environment of the worker and mental health. Furthermore, by using recycled polyester filament made of PET bottles, etc., which is 50% by weight or more of the total weight of dust-free garments (sewn products), it is compatible with the Eco Mark.
It is now possible to provide comfortable dust-free clothing that complies with the Green Purchasing Law, and it is also possible to provide dust-free clothing that is also transparent to the global environment and friendly to workers.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A41D 31/00 A41D 31/00 501N 502 502B 503 503G D03D 15/00 D03D 15/00 E 101 101 101 D06M 15 / 27 D06M 15/27 15/564 15/564 F term (reference) 3B011 AA02 AB02 AC06 AC26 4L033 AA07 AB05 AC06 AC07 BA16 BA19 BA28 BA55 CA50 4L048 AA20 AA52 AA54 AB07 AB16 AC13 AC15 BA03 CA05 CA07 DA01 DA24

Claims (5)

[Claims] 1. A woven fabric containing a polyester filament (A) and a conductive fiber filament (B) which are regenerated containing a recovered polyester, and sewn using a fabric satisfying the following requirements (1) to (3). A dust-free garment comprising recovered polyester having excellent wearing comfort and transparency, characterized in that the weight ratio of the polyester filament (A) accounts for 50% by weight or more of the total weight of the sewn product. Moisture absorption rate at 20 ° C, 65% RH environment is 1.5% or more 20 ° C, 65% RH environment and 30 ° C, 95% RH environment has 3% or more difference in moisture absorption and desorption rate. Water absorption rate by wicking method is 1 second or less. The transparency (color difference ΔE) measured by using a color difference meter at a drying rate of 70% or more by air-drying at 20 ° C. and 65% RH for 30 minutes was 15.
0 or less 2. A filament containing a conductive fiber filament (B) is arranged on at least one of warp and / or weft, and the arrangement interval of the filament containing the conductive fiber filament (B) is 20 to 40 mm. , JI
The performance after 50 industrial washings according to the SL0217103 method satisfies the following requirements (1) to (3): Dust-free structure comprising the recovered polyester having excellent wearing comfort and anti-transmission property according to claim 1. Clothes. Particle generation or more particle size 0.5μm frictional electrification voltage 1kV or less JIS B9923 (tumbling) is 500 / ft ³ · 100c
m ² or less Tear strength by pendulum method is 9.8 N or more, tear strength retention rate at the beginning of washing is 80% or more 3. The wearing comfort and the transparency-preventing property according to claim 1 or 2, wherein the polyester filament (A) regenerated containing the recovered polyester contains 1 to 5% by weight of a matting agent. Dust-free garment made of highly recovered polyester. 4. A vinylcarboxylic acid and / or a vinylsulfonic acid, and at least one divinyl monomer or trivinyl monomer selected from the general formulas (1), (2), (3) and (4) and initiation of polymerization. And a vinylcarboxylic acid monomer and / or a vinylsulfonic acid monomer and a divinyl monomer or a trivinyl monomer adhered to the fiber surface layer in a weight ratio of 1: 1 to 1:10. Item 5. A dust-free garment comprising the recovered polyester according to any one of items 1 to 3, which is excellent in wearing comfort and transparency. [Chemical 1] 5. A reactive polyurethane-based binder is used as a nucleating agent for the coating layer on the fiber surface layer, and a vinylcarboxylic acid monomer and / or a vinylsulfonic acid monomer, the above-mentioned general formulas (1), (2), (3), ( The wearing comfort according to any one of claims 1 to 4, wherein at least one kind of divinyl monomer or trivinyl monomer selected from 4) is crosslinked into a film through an oxazoline-based or aziridine-based crosslinking agent. Dust-free garment made of recycled polyester, which has excellent properties and transparency.