JPH09268402A - Polyester underwear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject underwear having the shape-stability and strength-retainability of polyester fiber, comfortably wearable by its high moisture-absorptivity and soft feeling and free from the degradation caused by the deposition of suspending dust by using a moisture-absorbing polyester filament as a constituent yarn and forming a knit fabric having low frictional electrification voltage and a specific rigidity. SOLUTION: This underwear is composed of a knit fabric generating a frictional electrification voltage of <3kv measured in conformity with JIS L1094B and a rigidity of 5-30mm measured by cantilever method and containing a moisture-absorbing polyester filament having a moisture absorption and desorption parameter ΔMR of >=1% as a constituent yarn. The underwear is comfortably wearable as a general women's underwear such as petticoat or a general men's underwear such as athletic shirt.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hygroscopic polyester underwear. For more details, lingerie, petticoat, shorts, bodysuit, girdle,
Underwear for general women such as brassieres, or a round neck shirt,
The present invention relates to a hygroscopic polyester underwear that can be comfortably worn as underwear for general men such as U-neck shirts, running shirts and briefs.

[0002]

2. Description of the Related Art Polyester fibers are widely used mainly for clothing and industrial applications because they are excellent in morphological stability, mechanical strength, chemical resistance, heat resistance and washing durability. However, on the other hand, since polyester fiber has a very low moisture absorption rate, it may cause stuffiness or stickiness due to sweating from the skin in applications where it touches the skin directly like underwear or is worn close to the skin side. There was a flaw.

Further, since polyester fibers are apt to be charged and have a high friction electrification voltage, they tend to cling to the skin when worn. Also, when the environmental humidity is low, such as in the winter, dust in the air adheres due to the generation of static electricity at the time of storage or wearing at sewing factories, retail stores, or at home, and the underwear becomes dark and deteriorates in quality. Bringing is a problem.

In this respect, in terms of comfort, it is inferior to natural fibers and cellulosic synthetic fibers, and the advancement to underwear applications is partly limited. However, although natural fibers and cellulosic synthetic fibers have high hygroscopicity and can be worn comfortably, they have lower strength than polyester fibers, poor wash durability, and are more susceptible to wrinkling and form stability. There are drawbacks such as chipping.

In order to eliminate the above-mentioned drawbacks, for example, Japanese Patent Publication No. 60-475, Japanese Utility Model Publication No. 60-40612, and Japanese Patent Publication No. 60-215835 have a high equilibrium moisture content (moisture absorption rate). There has been proposed an attempt to obtain moisture-absorbing comfort as a fabric by mixing fibers, synthetic fibers such as polyester fibers, plying, and aligning. According to these, the comfort is certainly improved, but the effect is not always sufficient, and the disperse dyes generally used when dyeing synthetic fibers cause stains or have poor homochromaticity, and There was a problem that the original physical properties of the fiber were lost.

There is also a method of imparting hygroscopicity in the post-processing stage. However, in order to obtain sufficient hygroscopicity by this method, a large amount of hygroscopic resin needs to be picked up in a knitted fabric for underwear, so the knitted fabric needs to have a certain thickness, and a thin fabric such as underwear Not suitable for. Further, even if sufficient hygroscopicity can be obtained, since the hygroscopic resin film is formed on the surface of the knitted fabric, the texture becomes hard and the feel becomes poor when worn as underwear. Further, there is a problem that the durability is not good because the resin drops by washing. On the other hand, as the underwear, it is desirable that the knitted underwear is soft in terms of touch and fit.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned problems of the prior art and to have characteristics such as shape stability and strength retention of polyester fiber.
(EN) It is intended to provide a polyester underwear having a high moisture absorption rate and a soft texture, which is comfortable to wear and does not deteriorate in quality due to adhesion of dust in the air.

[0008]

Means for Solving the Problems The polyester underwear of the present invention for solving the above problems includes a polyester filament having a moisture absorption / release parameter ΔMR of 1% or more as a constituent thread, and has a friction electrification voltage according to JIS L1094 B method. It is characterized in that it is made of a knitted fabric of less than 3 kv.

Since the underwear is composed of a knitted fabric containing the above polyester-based filament, while maintaining the original shape stability and strength retention of the polyester fiber,
It has a high moisture absorption rate and a soft texture, and can prevent deterioration of quality due to dust adhesion. In addition, since the knitted fabric is soft, it feels good when worn as underwear and fits well on the body.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, polyester underwear means a knitted fabric, and a polyester component is included as a constituent yarn (knitting yarn) of the knitted fabric.
This polyester underwear is not only made of a knitted fabric using only polyester fibers, but also made of a knitted fabric made of a mixed fiber with natural fibers or a cellulose-based synthetic fiber, or a natural fiber or a cellulose-based fabric. It includes underwear and the like knitted with synthetic fibers, and is not limited in any way.

The polyester-based filament used in the underwear of the present invention has a moisture absorption / release parameter ΔMR of 1% or more, and an underwear knit made of this polyester filament also has a moisture absorption / release parameter ΔMR of 1% or more. Is. More preferably, the moisture absorption / release parameter ΔMR is set to 1.5 to 10%, and further preferably 3% to 10%, from the viewpoints of comfort at the time of wearing, spinnability, and knitting property.
To If the moisture absorption / release parameter ΔMR is less than 1%, the moisture absorption rate is low, and it becomes difficult to prevent stuffiness and stickiness due to sweating from the skin.

Further, it is preferable that washing durability is excellent with respect to hygroscopicity, and the moisture absorbing / releasing parameter ΔM after washing 5 times
Make sure R is within 70% before washing. In the present invention, the moisture absorption / release parameter ΔMR is 30 ° C. × 90% R
Expressed as the difference between the moisture absorptivity MR ₁ at moisture absorption MR ₂ with 20 ℃ × 65% RH in H, ΔMR (%) = MR
It refers to a value represented by the formula ₂ -MR _1.

That is, the moisture absorption / release parameter ΔMR is
It is a driving force to obtain comfort by releasing moisture inside clothes to the outside air when wearing clothes.
30 ℃ × 90% when performing moderate work or light to moderate exercise
The difference in moisture absorption rate between the temperature inside clothes represented by RH and the outside temperature humidity represented by 20 ° C. × 65% RH is shown. In the present invention, this moisture absorption / desorption parameter ΔMR is used as a scale for moisture absorption evaluation. The larger the value, the higher the moisture absorption / desorption power, and the better the wearing comfort is. It is possible to prevent the adhesion of dust inside.

The polyester underwear of the present invention is JIS L
The friction charge voltage according to 1094 B method (friction charge voltage measurement method) is less than 3 kv, and more preferably less than 1 kv. From the viewpoint of the antistatic effect of durability against washing, it is preferable that the frictional electrification voltage after 5 times of washing is less than 3 kv, and less than 1 kv and substantially 0 k.
More preferably, it is v.

Here, one wash means that 25 liters of a 0.2% slightly alkaline synthetic detergent solution at 40 ± 2 ° C. is put in a washing tub of a commercially available automatic reversing spiral type electric washing machine to prepare a test cloth and an additional cloth. After adjusting the total weight to about 500g,
Laundry 5 minutes, dehydration 30 seconds, rinsing 2 minutes, dehydration 30 seconds, rinsing 2 minutes, dehydration 30 seconds. In addition, rinsing is performed while overflowing using room temperature water.

The polyester underwear of the present invention is composed of a knitted fabric. A knitted fabric having this knitted fabric has a density of 26
-85 wells / inch and 30-138 courses / inch, and the constituent yarn of at least one of the wells and courses has a single yarn fineness of 0.1 to 10 denier and a total fineness of 30 to 175 denier, And the basis weight is 6
It is preferably 0 to 280 g / m ² .

When the density of the knitted fabric is less than 26 wells / inch and less than 30 courses / inch, it is difficult to use as underwear due to a decrease in strength of underwear and generation of eye distortion, and the knitting property is deteriorated. Become a trend. Also, if the density exceeds 85 wells / inch and 138 courses /
When it exceeds inches, the texture of the knitted fabric becomes stiff, the feeling of lightness is impaired, and the knitting property is deteriorated, so that it is difficult to use as underwear.

When the basis weight of the knitted fabric is less than 60 g / m ² , the garment has no suppleness and 280 g / m ^{2 on} the contrary.
When it is larger than m ² , the texture of underwear becomes hard and the feeling of lightness is impaired. Further, regarding the yarn constituting the knitted fabric, when the single yarn fineness of at least one of the course and the well exceeds 10 denier, the texture of the knitted fabric becomes hard and it becomes difficult to use it as underwear. Further, if it is less than 0.1 denier, the spinnability tends to be deteriorated. The lower limit of the single yarn fineness is more preferably 1 denier or more from the viewpoint of knitting property and strength of underwear.

Further, as the constituent yarns of the knitted fabric, yarns having different finenesses such as mixed yarns of different fineness can be used, and such mixed yarns of different fineness produce soft and tight underwear. It is preferable from the viewpoint. In the case of using the mixed yarn of different fineness, when hygroscopic polyester fiber is used as the yarn of large fineness, it is possible to obtain soft and tight underwear with high moisture absorption.

When the total fineness of the yarns constituting the knitted fabric is less than 30 denier, the knitting property and the yarn forming property are deteriorated, and the undergarment tends to have no elasticity. Further, when the total fineness is larger than 175 denier, the texture of the knitted fabric becomes hard and it becomes difficult to use it as underwear. Also,
As for the softness of the knit, the bending resistance by the cantilever method, which is the standard of softness, is 5 to 30 mm. Bending degree is 30
If it is larger than mm, the texture of the knitted fabric becomes hard and it becomes difficult to use as underwear. On the other hand, if it is less than 5 mm, the texture of the knitted fabric becomes too soft and clings to the body, making it difficult to move.

The polyester underwear knitted fabric of the present invention may be any of warp knitted fabric such as tricot fabric, Russell fabric, and circular knitted fabric such as single circular knitted fabric and double circular knitted fabric. It is not limited. The knitting structure is usually used as underwear, such as a half structure of a warp knitted fabric, a mesh structure, a back half structure, a queen's cord structure, a satin structure, or a circular knitted fabric, an interlock structure, a rib structure, etc. It is not particularly limited as long as it has a knitting structure.

In the polyester underwear of the present invention, the hygroscopic polyester filament has a moisture absorption / release parameter Δ.
There is no particular limitation as long as the filament has a moisture absorption rate of 1% or more and contains a polyester component. However, it is preferable to use a fiber having the following constitution in consideration of the yarn-forming property, the knitting property, the dyeing property, and the durability of the yarn performance.

That is, a polyester obtained by copolymerizing a hydrophilic compound (A) and containing 5% or more of at least one of a polar group-containing compound (B) and a cross-linking agent (C) and having hygroscopicity. It is preferable to use a composite fiber containing polyester (D) or a composite fiber containing 5% or more of a polyether ester amide (E) or a mixture of a polyether ester amide and another thermoplastic resin (F). preferable.

Hereinafter, each fiber will be described in detail. First, a description will be given of a hygroscopic copolymerized polyester (D) which is a polyester copolymerized with a hydrophilic compound (A) and contains at least one of a polar group-containing compound (B) and a crosslinking agent (C). To do. The molecular weight of the hydrophilic compound (A) is 600 to 600 from the viewpoint of compatibility with polyester and dispersibility in polyester.
It is preferably 20,000. More preferably, 1
000 to 10,000, more preferably 200
It is 0 to 6000.

The hydrophilic compound (A) is preferably a compound containing one or more ester-forming groups, and is not particularly limited, but typical compounds include polyoxyalkylene compounds, polyoxazolines, and polyoxyazolines. Acrylamide and its derivatives can be used. Among them, polyoxyalkylene compounds are preferable, and polyoxyethylene compounds are more preferable.

Further, among the polyoxyethylene compounds, polyethylene glycol compounds are preferable, and polyethylene glycol containing a crystallization inhibitor is particularly preferable. Here, the crystallinity-suppressing factor refers to an organic residue that exists in the molecular chain or at the terminal and disturbs the symmetry of the repeating unit of polyethylene glycol. Crystallization suppression refers to chain scanning calorimetry (DSC, temperature rising condition 16 ° C / min)
Is lower than the melting point of polyethylene glycol having the same molecular weight.

The copolymerization ratio of the hydrophilic compound (A) is not particularly limited, but from the viewpoint of spinnability, it is preferably 40 to 99% by weight based on the total weight of the polymer. Most of these compounds are preferably copolymerized in the polyester, but some of them may be present in a dispersed state in the polymer. The polar group-containing compound (B) contained in the copolymerized polyester (D) is not particularly limited, but may be represented by the following general formula (I): Y _i -R ₁ -X _n (I) (where R ₁ is organic residue, X is one selected ester is formed group n is 1 or a positive number, Y _i is an amino group, a sulfonic group, a carboxyl group, a hydroxyl group, among the derivatives such as amide groups and phosphonic acid groups A compound having a polar group represented by the following polar group (i is an integer of 1 or more) is preferable.

Here, the term "containing" means a state of being dispersed or copolymerized in the polyester, and particularly preferably a state of being copolymerized. As the compound, a compound having a sulfonate group is particularly preferable. By incorporating a polar group-containing compound, not only the hygroscopicity of the polymer further increases, but also hydrogen bonding and ionic mutual bonding action occur in the polymer, and when it is made into a fiber, it is difficult to change the physical properties over time. can get.

From the viewpoint of preventing the occurrence of yarn breakage and making it less likely to change over time, the content of the polar group-containing compound (B) is 0 to 50 relative to the acid component constituting the whole polymer.
It is preferably mol%, more preferably 2 to 15
Is a mole. The crosslinking agent (C) contained in the copolyester (D) is not particularly limited as long as it is a compound that reacts with the polyester to form a crosslinked structure, but is not limited to the following general formula (II) (R ₃ O) _n R ₂ (COOR ₄ ) _m (II) (wherein R ₂ is a trivalent to hexavalent organic residue, R ₃ is hydrogen or an acetyl group, and R ₄ is hydrogen or an alkyl group. It is preferable to use a polyfunctional compound represented by 3 ≦ m + n ≦ 6)).

Here, the term "containing" means a state of being dispersed in polyester, but a state of having a crosslinked structure by copolymerization is preferable. As the compound, polyfunctional carboxylic acids such as trimellitic acid and pyromellitic acid, and polyols such as glycerin, trimethylolpropane, and pentaerythritol are preferable, and trimellitic acid is particularly preferable. By containing the cross-linking agent (C), not only the hygroscopicity of the polymer is further enhanced, but also a cross-linked structure is formed in the polymer, and the effect of hardly causing a change in physical properties over time when the fiber is used is obtained. .

The proportion of the cross-linking agent (C) is preferably 0 to 30 mol%, more preferably 1 to 15 mol%, and particularly preferably 2-1 to the acid component constituting the whole polymer.
0 mol%. When the content is within the above range, it is preferable because the moisture absorption is kept high, the spinning properties are improved, and the fiber properties such as strength are improved. In addition, copolyester (D)
Preferably contains at least one of the polar group-containing compound (B) and the cross-linking agent (C). It is more preferable to include both (B) and (C).

The copolymerized polyester (D) contains pigments such as titanium oxide and carbon black, surfactants such as alkylbenzene sulfonates, various antioxidants, and coloring agents within the range not impairing the object of the present invention. Of course, an inhibitor, a light stabilizer, an antistatic agent, etc. may be added. Next, the polyether ester amide (E) or a mixture of the polyether ester amide and another thermoplastic resin (F) will be described.

The polyether ester amide (E) is
A block copolymer having an ether bond and an ester bond in the same molecular chain. More specifically, one or two or more polyamide-forming components (G) selected from lactams, aminocarboxylic acids, and salts of diamines and dicarboxylic acids, and poly (alkylene oxide) glycols composed of dicarboxylic acids and poly (alkylene oxide) glycols A block copolymer obtained by subjecting the ether ester-forming component (H) to a polycondensation reaction can be preferably used.

As the polyamide-forming component (G) of the polyether ester amide, lactams, ω-aminocarboxylic acids, nylon salts and the like can be used, and these can be used alone or in combination of two or more. You can Preferred polyamide-forming components are ε-caprolactam and nylon 66 salt. On the other hand, the polyetherester component (H) constituting the soft segment of the polyetheresteramide is preferably a dicarboxylic acid having 4 to 20 carbon atoms and poly (alkylene oxide) glycol.

As the dicarboxylic acid having 4 to 20 carbon atoms,
Aliphatic, aromatic dicarboxylic acids, alicyclic dicarboxylic acids, and the like can be used, and one kind or a mixture of two or more kinds can be used. Preferred dicarboxylic acids include polyamides such as adipic acid and seba polyglycine, general-purpose thermoplastic resins such as polyester and polyolefin, cinnic acid, decadic acid, terephthalic acid, and isophthalic acid.

The poly (alkylene oxide) glycol may be polyethylene glycol, poly (1,2).
-Propylene oxide) glycol, poly (1,3-propylene oxide) glycol, polytetramethylene oxide glycol, polyhexamethylene oxide glycol, ethylene oxide and propylene oxide or
Random or block copolymerization with tetrahydrofuran can be used, and polyethylene glycol is particularly preferable. The number average molecular weight of the poly (alkylene oxide) glycol is preferably from 300 to 10,000, more preferably from 500 to 4,000.

The polyetheresteramide block copolymer is obtained by polycondensing the above-mentioned polyamide-forming component (G) and polyetherester-forming component (H). As the thermoplastic resin (F), for example,
One or more of polyamides, polyesters, and polyolefins such as nylon 66 and nylon 6 can be used. In particular, nylon 66, nylon 6,
Modified polyethylene terephthalate copolymerized with a sulfonate compound is preferable because it has good compatibility with polyetheresteramide, can be finely dispersed in each other, and has a small swelling due to hot water.

Preferred sulfonate compounds as a copolymerization component of the modified polyester herein are 5-sodium sulfoisophthalic acid, 5- (tetraalkyl) phossonium sulfoisophthalic acid and their ester derivatives, sodium p-hydroxyethoxybenzenesulfonate. , 2,5-bis (hydroxyethoxy) benzenesulfonate and the like can be used.

The copolymerization amount of the sulfonate compound is preferably 0.1 to 7 mol% with respect to the acid component in view of compatibility with the polyether ester amide and physical properties of the resulting blend fiber, and more preferably. , 0.2 to 6 mol%, and more preferably 0.5 to 5 mol%. Polyetheresteramide and thermoplastic resin (F)
The mixing ratio is preferably from 5 to 50% by weight, more preferably from 5 to 50% by weight, from the viewpoint of obtaining sufficient moisture absorption properties and preventing cracking of the fiber surface due to swelling in a hot water atmosphere such as a dyeing process. It is 7 to 45% by weight, more preferably 10 to 40% by weight.

As the fiber-forming polymer, polyethylene,
Polyolefins such as polypropylene, polyamides such as nylon 6 and nylon 66, polyesters such as polyethylene terephthalate and polybutylene terephthalate can be used, but are not limited thereto. It is preferable to use a polyester mainly composed of polyethylene terephthalate, which is the most versatile synthetic fiber for clothing.

The form of the composite fiber is not particularly limited, but a core-sheath composite fiber, a core-sheath composite hollow fiber, a sea-island composite fiber, a laminated composite fiber or a blend fiber can be used. A polymer having a hygroscopic property such as a copolyester (D), a polyether ester amide (E) or a mixture of a polyether ester amide and another thermoplastic resin (F) is added to these conjugate fibers at an arbitrary ratio. It can be used as a constituent.

For example, in the case of the core-sheath type composite fiber composed of the core part 1 and the sheath part 2 shown in FIG. 1 and the core-sheath type composite hollow fiber composed of the core part 1, the sheath part 2 and the hollow part 3 shown in FIG. Uses a polymer having a hygroscopic property such as a copolymer polyester (D), a polyether ester amide (E) or a mixture of a polyether ester amide and another thermoplastic resin (F) for the core 1, and A polymer can be used for the sheath 2.

In this case, the composite ratio (% by weight) is core / sheath =
It is preferably 5/95 to 90/10. More preferably, 7/93 to 50/50, particularly preferably 1
0/90 to 30/70. The composite ratio can be arbitrarily selected for dyeing use and non-dying use. The lower limit of the composite ratio of the core portion is appropriately set for the purpose of imparting sufficient hygroscopicity, and the upper limit thereof may be appropriately set from the viewpoint of preventing deterioration of spinnability and deterioration of fiber physical properties.

The core-sheath cross-section of the core-sheath type composite fiber may be concentric or eccentric, and the fiber cross-section may be round, polygonal, or H-shaped. Sea-island type composite fiber consisting of sea part 1a and island part 2a shown in FIG. 3 or FIG.
Also in the laminated composite fiber composed of the laminated portions 1b and 2b shown in (1), a mixture of the same copolyester (D), polyether ester amide (E) or polyether ester amide and another thermoplastic resin (F) as described above. A polymer having a hygroscopic property such as is used for the island portion 2a or the bonded portion 2b, and the fiber-forming polymer is used for the sea portion 1
It can be used for a or the other bonded portion 1b.

The composite ratio of these hygroscopic polymers to the fiber-forming polymer is preferably 5 to 90% by weight. It is more preferably 7 to 50% by weight, and particularly preferably 10 to 30% by weight. The composite ratio can be arbitrarily selected for dyeing use and non-dying use.
The lower limit of the composite ratio is appropriately set for the purpose of imparting sufficient hygroscopicity, and the upper limit is appropriately set from the viewpoint of preventing deterioration of spinnability and deterioration of fiber physical properties.

Further, the hygroscopic polymer such as the above-mentioned copolyester (D), polyether ester amide (E) or a mixture of polyether ester amide and another thermoplastic resin (F) is a fiber-forming polymer. It can also be used as a blended fiber blended in a coalescence. In this case, the compounding ratio of these hygroscopic polymers to the fiber-forming polymer is 3 to 80% by weight based on the total amount of the polymers.
It is preferred that It is more preferably 5 to 35% by weight, still more preferably 7 to 30% by weight. The lower limit of the compounding ratio is appropriately set for the purpose of imparting sufficient hygroscopicity, and the upper limit of the compounding ratio is appropriately set from the viewpoint of preventing deterioration of spinnability and fiber physical properties.

The main component to be combined with the fiber-forming polymer is the above-mentioned copolyester, but may contain polyolefin, polyamide, polyester, polycarbonate, etc. within a range not impairing the effect thereof. Also,
To the fiber-forming polymer, pigments such as titanium oxide and carbon black, various antioxidants, anti-coloring agents, light-proofing agents, antistatic agents, etc. may be added to the fiber-forming polymer within the range that does not impair the object of the present invention. Of course good.

The polyester knitted fabric of the present invention comprises:
A rubber-like elastic thread typified by a polyurethane-based elastic thread may be included. Bodysuits, girdles, etc. in women's underwear contain the elastic rubber thread as described above, and its stretching power allows it to fit the woman's body and to correct the figure to make the body look beautiful. You can The mixing ratio of the rubber-like elastic yarn is preferably 30% or less of the total weight of the knitted fabric. If it exceeds 30%, the stretch power of the underwear is too strong, and when worn, the feeling of oppression becomes inferior to the feeling of wearing and the cost becomes high.

The method of mixing the rubber-like elastic yarn into the knitted fabric is as follows.
For example, a pair of polyurethane elastic yarns may be commonly knitted, or a covering yarn having the elastic yarn as a core and another fiber as a sheath may be knitted, and the knitting is not particularly limited. The dyeing process of the polyester underwear knitted fabric of the present invention, such as relaxing refining-dyeing-functionalization process-finishing set, there is no problem in the usual knitting process,
Other than that, there is no problem even if greige set or alkali treatment is performed.

The function-imparting process is not particularly limited as long as it keeps the texture of the knitted fabric soft and does not impair the object of the present invention, such as antistatic, deodorant, water-repellent, antifouling and antifungal processes. Not something. Further, it is more preferable to impart the functionality of the moisture absorption processing, since the moisture absorption rate of the knitted fabric is increased and the comfort when worn is improved. The polyester underwear of the present invention may use the above-mentioned knitted portion in whole or in part, and can be used without any limitation.

[0051]

EXAMPLES In the examples of the present invention described below, each evaluation of physical properties and the like was obtained by the following methods. [Moisture absorption and desorption parameter ΔMR] Original yarn or knitted fabrics 1 to 3
g, dry weight and 20 ° C x 65% R
The moisture absorption rate of the following equation was calculated and calculated from the weight change from the weight after standing for 24 hours in a commercially available thermostat and humidity chamber under the atmosphere of H and 30 ° C. × 90% RH. Moisture absorption rate (%) = [(weight after moisture absorption−weight in absolute dryness) / weight in absolute dryness] × 100 Moisture absorption rate MR ₁ and 30 ° C. × 90% RH under the above conditions of 20 ° C. and 65% RH From the moisture absorption rate MR _{2 under} the above condition, the difference between the two moisture absorption rates ΔMR (%) = MR ₂ −MR ₁ was used as the moisture absorption / desorption parameter.

[Bending flexibility according to the cantilever method] JIS L
1018 “Knitted fabric test method”.
Five 2 cm x 15 cm test pieces are taken in each of the vertical and horizontal directions. Using a cantilever type tester having one end having a slope of 45 degrees, the short side of one end of the test piece is aligned with the scale reference on the slope side of the tester. Slide the test piece in the direction of the slope and read the position of the other end when one end of the test piece contacts the slope. The length of sliding of this test piece is defined as the bending resistance (mm). Evaluate with the average value of 5 vertical and 5 horizontal. The smaller this value is, the softer it is. [Comfort when wearing and clinging] Each knitted fabric is made into a petticoat for women's underwear, and this petticoat is worn as underwear in a room at a constant temperature and humidity of 30 ° C x 65%. 15 light exercise
After a minute, the subject's sensory test was performed to evaluate comfort, and the presence or absence of clinging to the leg of the petticoat was examined.

The results of the comfort evaluation were displayed as ×: discomfort, Δ: somewhat comfortable, ◯: comfortable, ⊚: very comfortable. Example 1 As a copolyester, dimethyl terephthalic acid 19
4 parts, ethylene glycol 135 parts, dimethyl 5-sodium sulfoisophthalate 26.6 parts, trimethyl trimellitate 7.5 parts and tetrabutyl titanate 0.
After adding 1 part and carrying out a transesterification reaction, a molecular weight of 40
328 parts of polyethylene glycol of 00 was added and polymerized to obtain a copolyester which is a hygroscopic polymer.

The thus-obtained copolymerized polyester was used as a core component, and polyethylene terephthalate was used as a sheath component, and the copolymerized polyester was 20% by weight based on the total weight of the fiber. 30 denier, 12 filaments (single yarn fineness 2.5
A denier) concentric core / sheath composite fiber was obtained. The moisture absorption / release parameter ΔMR of this raw yarn was 3.3%. Aiming at lingerie and petticoat knitting for women's underwear, using 100% of this filament to knit a raw fabric with a half structure of a tricot knitting machine 36G, and then finishing density of 52 wells / inch according to a normal tricot dyeing method. , 71
A knitted fabric having a basis weight of 85 g / m ² was produced at a course / inch, and a petticoat for wearing evaluation was produced by using this knitted fabric to evaluate clinging to the legs.

The moisture absorption / release parameter ΔMR of this knitted fabric was 3.3%, the moisture absorption / release parameter ΔMR after 5 washes was 3.2%, the frictional electrification voltage was 0.1 kv, and the friction band after 5 washes. The voltage was 0.3 kv. The bending resistance of this knit was 7 mm. In the comfort test, it was very comfortable (⊚), and no clinging to the legs of the petticoat was observed. Furthermore, the comfort test after 5 times of washing was also very comfortable (⊚), and clinging to the legs of the petticoat was not seen. Table 1 shows the evaluation results.

[0056]

[Table 1]

Example 2 In Example 1, a composite fiber of 75 denier and 96 filaments (single yarn fineness 0.8 denier) in which the hygroscopic polymer was 10% by weight based on the total weight of the fiber was obtained. The moisture absorption / release parameter ΔMR of this raw yarn was 1.8%.

Aiming at knitting for circular neck shirts and U-neck shirts for men's underwear, using 100% of this filament, knitting a raw machine with an interlock structure of a double circular knitting machine 24G, and then dyeing an ordinary circular knitted fabric. Finishing density 36 according to the processing method
Well / inch, 56 courses / inch
A knitted fabric of m ² was prepared, and a petticoat for evaluating clinging to a leg was prepared in the same manner as in Example 1.

The moisture absorption / release parameter ΔMR of this knitted fabric was 1.8%, the moisture absorption / release parameter ΔMR after 5 washes was 1.6%, the frictional electrification voltage was 0.2 kv, and the friction band after 5 washes. The voltage was 0.4 kv. The bending resistance of this knit was 10 mm. In the comfort test, it was very comfortable (⊚), and no clinging to the legs of the petticoat was observed. Furthermore, the comfort test after 5 times of washing was also very comfortable (⊚), and clinging to the legs of the petticoat was not seen.

As a result of making and wearing a concrete U-neck shirt, it was comfortable without clinging to the body as described above. Table 1 shows the evaluation results. Example 3 In Example 1, a composite fiber of 175 denier and 36 filaments (single yarn fineness 4.9 denier) in which the hygroscopic polymer was 7% by weight based on the total weight of the fiber was obtained. The moisture absorption / release parameter ΔMR of this yarn was 1.5%.

Aiming at a knit for a bodysuit which is an underwear for women, a single knitting is made by using 88% of this filament and 12% of 40 denier polyurethane elastic yarn (trademark "Operon" manufactured by Toray DuPont Co., Ltd.). After knitting the raw fabric with the circular knitting machine 28G's plain cloth reversible structure, the finish density is 42 wells / inch and 52 courses / inch according to the usual polyurethane-based elastic yarn interlacing circular knitting dyeing method.
A knitted fabric of 63 g / m ² was prepared, and a petticoat was prepared in the same manner as in Example 1.

The moisture absorption / release parameter ΔMR of this knitted fabric was 1.3%, the moisture absorption / release parameter ΔMR after 5 washes was 1.0%, the friction electrification voltage was 0.7 kv, and the friction band after 5 washes was determined. The voltage was 0.9 kv. In the comfort test, it was comfortable (○), and no clinging to the legs of the petticoat was observed. Furthermore, the comfort test after 5 times of washing was also comfortable (○), and the clinging of the petticoat to the leg was not appreciable.

As a result of making and wearing a bodysuit which is concrete underwear, it was comfortable without dust adhesion. Table 1 shows the evaluation results. Comparative Example 1 In Example 1, a composite fiber of 20 denier and 12 filaments (single yarn fineness of 1.7 denier) in which the hygroscopic polymer was 3% by weight with respect to the total weight of the fiber was obtained. The moisture absorption / release parameter ΔMR of this yarn was 0.6%.

Aiming at knitting for lingerie and petticoats for women's underwear, knitting a raw machine with a half structure of a tricot knitting machine 36G using 100% of this filament,
Finishing density of 40 according to the usual tricot dyeing process
Well / inch, 53 courses / inch, basis weight 51 g / m
² of knitting produced, to prepare a petticoat in the same manner as in Example 1 by further using the knitted fabric.

The moisture absorption / release parameter ΔMR of this knitted fabric was 0.6%, the moisture absorption / release parameter ΔMR after 5 washes was 0.5%, the friction electrification voltage was 1.2 kv, and the friction band after 5 washes was determined. The voltage was 1.7 kv. The comfort test was slightly comfortable (△), and the comfort test after 5 times of washing was also slightly comfortable (△). No clinging to the legs of the petticoat was seen before and after washing. However, it was too thin for underwear to be easily seen through, and was also fragile and easily broken.

The evaluation results are summarized in Table 1. Comparative Example 2 Polyurethane type elastic yarn (made by Toray-Dupont Co., Ltd.) of normal polyester multifilament 50 denier with moisture absorption / release parameter ΔMR of 0%, 4 filaments (single yarn fineness 12.5 denier) 95% and 40 denier Trademark "Operon") of 5%, aiming at knitting for bodysuits for women's underwear, after knitting a raw machine with a 3 bar 3 layer structure of tricot knitting machine 28G, ordinary polyurethane elastic yarn According to the dyeing method of the knitted tricot fabric, the finish density is 58 wells / inch, and the basis weight is 32 at 78 courses / inch.
A knit of ² g / m ² was prepared, and a petticoat was prepared in the same manner as in Example 1 using this knit.

The moisture absorption / release parameter ΔMR of this knit is 0.
%, The moisture absorption / release parameter ΔMR after 5 times washing was 0%, the friction electrification voltage was 3.4 kv, and the friction electrification voltage after 5 times washing was 3.4 kv. In addition, the bending resistance of this knit is 41
mm. In the comfort test, it was unpleasant (x), and clinging to the legs of the petticoat also occurred violently. Furthermore, the comfort test after 5 times of washing was also unpleasant (x), and the clinging to the leg part of the petticoat was as strong as before washing. In addition, as a result of making and wearing a bodysuit that is a specific underwear, it becomes black with a lot of dust adhesion, and it is too heavy and hard to move and easily tired, and at the same time, the single yarn fineness is as thick as 12.5 denier. ,
The texture was rough and hard to the touch.

The evaluation results are summarized in Table 1. Comparative Example 3 Polyurethane elastic yarn of 40 denier, 18 filament (single yarn fineness: 2.2 denier) 80% and 50 denier of a normal polyester multifilament having a moisture absorption / release parameter ΔMR of 0% (“Operon” manufactured by Toray DuPont). ) 20% cross knitting, aiming at a girdle knitting for women's underwear, knitting a raw machine with a special three-layer structure of a tricot knitting machine 32G, and then dyeing according to a usual tricot fabric dyeing method, and further Finished with an antistatic finish of 9
0 well / inch, 142 courses / inch
A knitted fabric of g / m ² was produced, and a petticoat was produced in the same manner as in Example 1 using this knitted fabric.

The moisture absorption / release parameter ΔMR of this knitted fabric was 0.1%, and the moisture absorption / release parameter ΔMR after washing 5 times was 0.
%, The frictional electrification voltage was 0.5 kv, but the frictional electrification voltage after washing 5 times was 3.1 kv. The bending resistance of this knit was 36 mm. In the comfort test, it was uncomfortable (x) before washing and after 5 times of washing. Although there was no clinging to the legs of the petticoat before washing, clinging to the legs after 5 washes was severe. In addition, as a result of making and wearing a girdle as a specific undergarment, it was too heavy, difficult to move, and easily tired. A lot of dust adhered and it became blackish.

The evaluation results are summarized in Table 1. Example 4 ε-caprolactam 340 parts, terephthalic acid 18 parts, polyethylene glycol 100 having a number average molecular weight of 1000
One part was placed in a polymerization reaction vessel and a polymerization reaction was carried out to obtain a polyether ester amide block copolymer having an N6 component content of 45% by weight.

70 parts by weight of the polyether ester amide block copolymer thus obtained and 30 parts by weight of modified polyethylene terephthalate obtained by copolymerizing 2 mol% of 5-sodium sulfoisophthalic acid were blended in a chip state as a core component, Polyethylene terephthalate as sheath component, 30 denier, 12 filaments (single yarn fineness 2.5
A denier) concentric core / sheath composite fiber was obtained. The moisture absorption / release parameter ΔMR of this yarn was 2.5%.

Aiming at knitting for lingerie and petticoats for women's underwear, after knitting a raw machine with a half structure of a tricot knitting machine 36G using 100% of this filament,
Finishing density of 51 according to the usual tricot dyeing process
Well / inch, weight per unit at 70 courses / inch 81g / m
² of knitting produced, to prepare a petticoat in the same manner as in Example 1 by further using the knitted fabric.

The moisture absorption / release parameter ΔMR of this knitted fabric was 2.5%, the moisture absorption / release parameter ΔMR after 5 washes was 2.2%, the frictional electrification voltage was 0.1 kv, and the friction band after 5 washes. The voltage was 0.2 kv. In the comfort test, it was very comfortable (⊚), and no clinging to the legs of the petticoat was observed. Furthermore, the comfort test after 5 times of washing was also very comfortable (⊚), and clinging to the legs of the petticoat was not seen.

The evaluation results are shown in Table 1. Comparative Example 4 The copolymer polyester obtained in Example 4 was used as a core component,
A 20 denier 12 filament (single yarn fineness 1.7 denier) concentric core / sheath composite fiber in which polyethylene terephthalate was used as a sheath component and the amount of the copolymerized polyester was 3% by weight based on the total weight of the fiber was obtained. The moisture absorption / release parameter ΔMR of this raw yarn was 0.5%.

Using this composite fiber, aiming at a lingerie or petticoat knit for women's underwear, and in the same manner as in Comparative Example 1, a finishing density of 41 wells / inch, 54 courses / inch and a basis weight of 57 g / m ² were obtained. A knitted fabric was produced, and a petticoat was produced in the same manner as in Example 1 using this knitted fabric. The moisture absorption / release parameter ΔMR of this knit is 0.5%,
The moisture absorption / release parameter ΔMR after washing 5 times was 0.4%, the friction electrification voltage was 1.7 kv, and the friction electrification voltage after 5 washings was 1.9 kv.

The bending resistance of this knit was 36 mm. The comfort test was unpleasant (x), and the comfort test after 5 times of washing was also uncomfortable (x). However, clinging to the legs of the petticoat was not seen before and after washing. Also, no dust adhered. However, it was too thin for underwear to be transparent, weak in strength, easy to tear, and clinging to the body.

The evaluation results are summarized in Table 1. Comparative Example 5 Knitted fabric for round neck shirts and U-neck shirts for men's underwear using 200% denier of normal polyester multifilament having a moisture absorption / release parameter ΔMR of 0% and 100% of 48 filaments (single yarn fineness of 4.2 denier) The knitting machine was knitted with the 1/1 rib structure of the double circular knitting machine 18G aiming at the following, and the finishing density of 21 wells / inch and the basis weight of 121 g / m according to the usual circular knitting dyeing method.
² of knitting produced, to prepare a petticoat in the same manner as in Example 1 by further using the knitted fabric.

The moisture absorption / release parameter ΔMR of this knitted fabric was 0% before and after washing, and the frictional electrification voltage was 3.5 kv before and after washing. The bending resistance of this knit was 8 mm. The comfort test was unpleasant (x), and the comfort test after 5 times of washing was also uncomfortable (x). The clinging to the legs of the petticoat was also intense before and after washing. In addition, as a result of making and wearing a U-neck shirt, which is a specific underwear, it has a lot of dust and becomes dark, and it is easy to see through as underwear. It was weak. The evaluation results are summarized in Table 1.

[0079]

As described above, according to the present invention, stuffiness and stickiness caused by the low moisture absorption, which is a defect of polyester fiber, and clinging to the skin and dust adhesion due to high friction electrification voltage do not occur. Polyester underwear can be obtained. Moreover, the inherent shape stability, mechanical strength, chemical resistance, and heat resistance of polyester fibers,
Washing durability can be provided.

[Brief description of drawings]

FIG. 1 is a model diagram showing a cross section of a core-sheath composite fiber used in the present invention.

FIG. 2 is a model diagram showing a cross section of a core-sheath composite hollow fiber used in the present invention.

FIG. 3 is a model diagram showing a cross section of a sea-island composite fiber used in the present invention.

FIG. 4 is a model diagram showing a cross section of a laminated conjugate fiber used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core part 2 Sheath part 1a Island part 2a Sea part 1b, 2b Lamination part 3 Hollow part

Claims (5)

[Claims] 1. A moisture absorbing / releasing parameter ΔMR as a constituent yarn.
Contains a polyester-based filament whose ratio is 1% or more,
Friction charge voltage according to JIS L 1094 B method is 3 kv
Polyester underwear consisting of a knitted fabric having a length of less than 5 and a bending resistance of the knitted fabric by the cantilever method of 5 to 30 mm. 2. The density of the knitted fabric is 26 to 85 wells / inch and 30 to 138 courses / inch, and the single yarn fineness of at least one of the wells and the courses is 0.1 to 10 denier, Total fineness is 30-175
The polyester underwear according to claim 1, which has a denier and a basis weight of 60 to 280 g / m ² . 3. The polyester underwear according to claim 1, wherein the moisture absorption / release parameter ΔMR of the knitted fabric is 1% or more. 4. A composite fiber in which the polyester-based filament is a polyester obtained by copolymerizing a hydrophilic compound and contains 5% by weight or more of a copolymerized polyester containing at least one of a polar group-containing compound and a crosslinking agent, or The polyester underwear according to claim 1, which is a blended fiber. 5. The polyester filament according to claim 1, which is a composite fiber or a blend fiber containing 5% by weight or more of a polyether ester amide or a mixture of a polyether ester amide and another thermoplastic resin. Polyester underwear described in.