JPH0345701A - Underwear - Google Patents

Abstract

PURPOSE:To obtain an underwear consisting essentially of a polyester fiber containing polyoxyalkylene glycol and sulfonic acid metal salt derivative at specific amounts, having high water absorbing properties and sweat absorbing properties, exhibiting no lowering of water absorbing properties also to repeated washing and capable of clearly dyeing. CONSTITUTION:The aimed underwear consisting essentially of a polyester fiber containing 0.2-10wt.% polyoxyalkylene glycol (e.g. polyoxyethylene glycol or polyoxyethylene-polyoxypropylene block copolymer) having at least 800 average molecular weight and 0.1-5wt.% sulfonic acid metal derivative [e.g. a compound expressed by formula I to formula IV (M is alkali metal; R is >=8C alkyl), etc.].

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to underwear that does not lose water absorption even after repeated washing, has excellent water absorption, sweat absorption and heat retention properties, and has a cotton-like feel.

[Conventional technology]

BACKGROUND ART Conventionally, woven or knitted fabrics made of fibers mainly made of cotton or regenerated cellulose fibers have been widely used for underwear due to their sweat and water absorption properties. Furthermore, when synthetic fibers such as polyester fibers are used as underwear, a hydrophilic treatment agent is often applied to the synthetic fibers or synthetic fiber cloth to impart hydrophilic properties.

[Invention or problem to be solved]

Conventional underwear has been made of fabrics mainly made of cellulose fibers, but depending on the wearing environment and the wearer, there have been problems in use, such as the formation of mold and a feeling of dampness due to sweat. On the other hand, synthetic fiber underwear does not have sufficient sweat or water absorption properties, which is not good for skin hygiene, and if it is made hydrophilic through post-treatment, the hydrophilic effect will be lost after repeated washing. It had drawbacks. In addition, when making colored underwear to add fashionability, the color fastness of cellulose fiber fabrics
In particular, there were problems in producing products with high I51:14f fastness and light fastness. An object of the present invention is to provide underwear that has high water absorption and sweat absorption properties, does not lose its water absorption effect even after repeated washing, can be dyed brightly, and has excellent color fastness.

[Means to solve the problem]

The present invention comprises 0.2 to 10% by weight of a polymeric polyoquinoalkylene glycol having an average molecular weight of at least 800;
This underwear is mainly composed of polyester fibers each containing 0.1 to 5% by weight of a sulfonic acid metal salt derivative. A feature of the present invention is that the main fibers constituting the underwear are durable water-absorbing polyester fibers. That is, the water-absorbing polyester fiber used in the present invention is
For example, when producing fibers by spinning polyesters such as polyethylene terephthalate, polybutylene terephthalate, copolymers containing 80 mol% or more of ethylene terephthalate, and polyhexamethylene terephthalate, the average molecular weight is at least 6,800, preferably 2,000 or more. It is important to blend the polyochinoalkylene glycol in an amount of 0.2 to 10% by weight based on the polyether, and further to blend the sulfonic acid metal salt derivative in an amount of 0.1 to 5% by weight. The polyoxyalkylene glycol having an average molecular weight of at least 6,800 is selected from, for example, polyoxyethylene glycol, polyoxyethylene-polyoxine propylene block copolymer, copolymer containing 50 mol% or more of polyoxyethylene, etc. Polyoquine alkylene glycols can be used. If the content of polyquinoalkylene glycol in the polyester polymer is less than 0.2% by weight, the desired water absorption is insufficient. If the amount is 10% by weight, spinnability will be poor, which is not preferable. Further, an antioxidant may be included in the polyoxyalkylene glycol. especially,
When using a polymer with a high melting point such as polyethylene terephthalate, the spinning temperature becomes high and polyoxyalkylene glycol tends to undergo oxidative decomposition and thermal decomposition. To prevent this, a hindered phenol-based antioxidant is added. It is effective to make it into fibers. On the other hand, the sulfonic acid metal salt derivative used in combination with the polyoxoalkylene glycol has surface active properties that have at least one hydrophilic group of the sulfonic acid metal salt and an appropriate hydrophobic group such as an alkyl group in one molecule. Compounds are preferred. For example, those having the following structures are available, but of course they are not limited to these. (5) R-CON-S03M, (6) R
OSO, M. (7) R-0((,H,O), SOJ. (9) RCONII-OSO,M Here, M represents an alkali metal, usually sodium, potassium, or lithium, with sodium-M being particularly preferred. R is preferably an alkyl group having 8 or more carbon atoms. If it is an alkyl group having 7 or less carbon atoms, the compatibility with polyester will be slightly poor. n is an integer of 20 or less. If the content of the sulfonic acid metal salt derivative in the polyester polymer is less than 1.1% by weight, the desired water absorbency will be insufficient.If it exceeds 5% by weight, the stringiness during spinning will be poor. This results in poor yarn breakage and undesirable single yarn breakage and yarn breakage, which is undesirable.Due to the low draw ratio, the yarn has low strength, which is undesirable.Also, polyoxyalkylene glycol and metal sulfonate The abundance ratio of salt derivatives is higher than that of sulfonic acid metal salt derivatives, which indicates better compatibility between the polyester, polyoxine alkylene glycol, and sulfonic acid metal salt derivatives. Preferably, the ratio of the polyoxyalkylene glycol to the sulfonic acid metal salt derivative is in the range of 6:4 to 7:3. It is also preferable from the viewpoint of water absorption performance.As the abundance ratio of the sulfonic acid metal salt derivative increases,
The dispersion state in the polyester is non-uniform, resulting in poor process properties such as spinnability and stretchability. In the present invention, a polyester polymer containing the above-mentioned compound is melt-spun and subjected to normal processing steps such as stretching, crimping, and heat treatment to produce polyester stable fibers with a single fiber fineness in the range of 1 to 10 deniers. Alternatively, it can be a filament. In addition, in order to obtain high water absorbency as underwear, the cross-sectional shape of the fibers is preferably round or irregularly shaped. especially,
Preferred cross-sectional shapes of the fibers include, for example, flat fibers having a specific degree of flatness (see FIG. 1) or irregular cross-sections ml having recesses of a specific shape (see FIG. 2). As the flattened fibers having a specific degree of flatness, for example, the first
As shown in the figure, the maximum length of the cross section of the textile structure is determined, and the maximum width is W.
In this case, the value expressed by L/W is the flatness, and the flatness is in the range of 1.5 to 15, preferably 2.5 to 8.
Flattened fibers are preferably in the range of 0. If the flatness is large, spinnability and drawability deteriorate, which is not preferred. In addition, irregular cross-section fibers having a recess in a specific shape satisfy d/12≦2, where d is the shortest distance connecting both ends of the entrance and Q is the distance to the deepest part of the recess. Therefore, a recess that is just a dent has little effect. The number of recesses is about 1 to 5. By using such a fiber with an irregular cross section, a synergistic effect between the water absorbing kneading agent and the capillary phenomenon in the fiber can be exerted. In the present invention, the above-mentioned water-absorbing polyester@fibers may be used as necessary with other fibers such as cotton, hemp, regenerated cellulose fibers, polyvinyl alcohol fibers, polyolefin fibers, polyamide FJ&L, polyester fibers, acrylic fibers, etc. It is used to make various types of fabrics such as woven and knitted fabrics using normal methods as spun yarns or filament yarns by blending them with kombucha or knitted fibers, which are then used as fabrics for underwear. In addition, in the case of making a non-woven fabric, for example, water-absorbing polyester fibers are used as stable fibers, and if necessary, heat binder fibers, heat binder fibers, etc.
It is mixed with heat-shrinkable fibers and fibers such as cotton, hemp, regenerated cellulose fibers, polyvinyl alcohol fibers, polyamide fibers, polyolefin fibers, polyester fibers, and acrylic fibers, and is processed using the normal dry method or It can be manufactured by a wet method. The underwear of the present invention is composed of these fabrics such as woven fabrics, knitted fabrics, non-woven fabrics, etc., and water-absorbent polyester fibers should be used in an amount of at least 60% by weight of the fibers constituting these fabrics to improve water-absorbing performance. Desired from the outside. Further, it is preferable that the underwear of the present invention is finished with a treatment agent such as an antibacterial agent, a deodorant, a fragrance, a cationic activator, and a softener, if necessary. In addition, when producing fibers, far-infrared radioactive substances such as metal oxides, ceramics, titanium dioxide, silica, alumina, magnesia, mullite, zirconia, zircon sand, spinel, ferrite, cordierite, etc.
It is also preferable to add 30% by weight from the viewpoint of heat retention. Underwear made using the water-absorbing polyester fiber of the present invention has high water and sweat absorption properties, does not lose its water-absorbing effect even after repeated washing, can be dyed vividly, and has excellent color fastness. Underwear made of fabric or non-woven fabric made mainly of polyester fibers. Furthermore, a sheet with excellent heat retention properties can be obtained.

【Example】

Next, embodiments of the present invention will be explained using specific examples, but the present invention is not limited to these examples. Note that parts and percentages in the examples are by weight unless otherwise specified. Further, the intrinsic viscosity was determined by measurement at 30° C. in a mixed solution of equal amounts of phenol/tetrachloroethane. Examples 1 to 4, Comparative Example 1 8% polyoxoethylene glycol having an average molecular weight of 11.000, 4% sodium dodecylbenzenesulfonate, and hindered polyethylene terephthalate melt having an intrinsic viscosity [η] = 0.62. After adding 0.5% of phenolic antioxidant and mixing through a static mixer, undrawn fibers with various cross-sectional shapes were obtained by spinning at a spinning temperature of 285°C using spinnerets with various nozzle shapes. . The fibers were stretched 3.5 times in hot water at 75°C, applied with a fiber oil containing a phosphoric acid ester modified ethylene oxide adduct, mechanically crimped, heat-set, and dried. After that, a water-absorbing polyester fiber having a single yarn fineness of 2 denier was obtained. The fibers were cut into staple fibers with a fiber length of 51a+a+, and then spun into yarn and woven in a conventional manner to produce plain woven fabrics (Examples 1 to 4). For comparison, ordinary polyethylene terephthalate fibers were used to fabricate plain woven fabrics in the same manner as above (comparison example).
It was placed on the water surface, and the time taken for water to spread over the entire surface, that is, the water absorption rate, was measured. As a result, as shown in Table 1, the fabrics of Examples had extremely good water absorption performance. In addition, when the fabric obtained in the example was sewn loosely and used, it had good sweat absorption even for people who sweat a lot, did not have a damp feeling, and was comfortable to the touch. Below is a margin table. Furthermore, the water diffusion area in the table is calculated using the raw cotton obtained in each example as a web with a density of 0.02 g/am', and under standard conditions (20°C, 65% RH) for red ink water liquid. 0,35
This is the spread area of the solution 10 minutes after dropping IIIQa. Also, after 10 washes, JIS LO217-10
It was carried out according to the three methods, and the water temperature was 40℃.
Add and dissolve 2 g of synthetic detergent for clothing to obtain a washing liquid, then add the sample and, if necessary, the load cloth to this washing liquid so that the bath ratio is L:30, and start washing. After processing for 5 minutes, the operation was stopped, and the sample and load cloth were dehydrated in a dehydrator. Next, the washing liquid was replaced with fresh water at room temperature, and rinsed for 2 minutes at the same bath ratio as above, followed by dehydration. Rinse again for 2 minutes and air dry. Do the above 10 operations
A measurement sample was obtained after repeating the test 10 times. Example 5 Ethylene oxide/propylene oxide (75:25) random copolymer having an average molecular weight of 15,000 and polybutylene terephthalate having an intrinsic viscosity [η] = 0.72.
After adding 0% sodium alkyl sulfonate, 1% higher sodium alkyl sulfonate, and 0.2% hindered phenolic antioxidant, and mixing them through a static mixer, the fibers were spun at a spinning temperature of 270°C to form the recesses shown in Figure 2 (1). A fiber having the following characteristics was obtained. This fiber was subjected to stretching, crimping, and heat setting to obtain a single 2.5-denier polyester staple fiber (cut length: 511). The cross-sectional shape of this fiber was d#=0.75. This fiber was spun into yarn, and a woven fabric was made using a conventional weaving method. The water absorption performance of this fabric has an initial diffusion area of 70 m.
The fabric had good water absorption performance, with a length of 69 mm'' after 10 washes and a water absorption rate of 3.8 seconds. When this fabric was sewn into underwear, it had a cotton-like feel and feel, had good sweat absorption, was not damp like cotton, and had high heat retention. In addition, even after repeated washing with water, there was almost no decrease in water absorption performance. Example 6 A melt of polyethylene terephthalate with an intrinsic viscosity [η] = 0.68 was added with 4% polyoxyethylene glycol having an average molecular weight of 116.000, 2% sodium dodecylbenzenesulfonate, and 0 hindered phenolic antioxidant. .5% and 6% of mullite (^LO*・5ift type ceramic fine powder) were added, mixed through a static mixer, and then spun at a spinning temperature of 285°C to obtain the results shown in Figure 1 (2).
) was obtained. The fibers were drawn in hot water at 75°C, applied with a fiber oil mainly composed of ethylene oxide adducts of phosphoric acid esters, mechanically crimped, heat-set, and dried. Polyester fibers were obtained. After cutting this fiber into staple fibers with a fiber length of 51 mm, this water-absorbing polyester fiber and a thermal binder fiber (fineness 2 denier, fiber length 51 mm) whose core component is polyethylene terephthalate and whose sheath component is a modified polyester are combined. 75+25 staple fibers
The fibers were blended at a ratio of , passed through card and random univer to form a fibrous web, subjected to entanglement treatment using the needle punch method, further treated with Mffite at 135°C to fix the fibers with binder fibers, and then subjected to embossing calendering. As a result, a fiber entangled nonwoven fabric having a texture pattern, an average date of 125 g/am, and an apparent density of 0.23 g/am3 was obtained. Regarding the water absorption performance of this nonwoven fabric, the initial value of the diffusion area was 6tm1, and the water absorption performance was 60.4a+s'' after washing 1 (1 time).
The water absorption rate was 3 seconds, indicating good water absorption performance. When this non-woven fabric was processed into a shirt and used, it had heat retention and
It had good sweat absorption properties. Example 7 4% polyoxyethylene glycol having an average molecular weight of 26.000, 2% sodium dodenlebenzenesulfonate, and a hindered phenolic antioxidant were added to a melt of polyethylene terephthalate having an intrinsic viscosity [η] = 0.68. 0
．． After adding 5% and 6% of mullite (kQtOz・5ift ceramic fine powder) and mixing through a static mixer, the material was spun at a spinning temperature of 285°C as shown in Figure 2 (1).
A fiber with a cross-sectional shape of was obtained. This fiber is drawn in hot water at 75°C, coated with a fiber oil, mechanically crimped, and dried.
A water-absorbing polyester fiber having a single yarn fineness of 2 denier was obtained. This fiber is made into stable fiber, spun into yarn, and then knitted to create a profit! When the two-knit fabric was dyed and sewn into underwear, it had high heat retention and sweat absorption, and did not feel wet.
It felt good in use, and even after repeated washing, there was no decrease in water absorption performance, and the dyeing changes were as good as ordinary polyester fibers. In addition, the water absorption performance of this fabric is based on the diffusion area or the initial value of 73 m.
1, 71.9 mm' after rinsing 10 times, and the water absorption rate was 25 seconds, indicating that it did not have good water absorption performance.

【Effect of the invention】

The underwear of the present invention made using a specific water-absorbing polyester fiber has high water absorption and sweat absorption properties, does not lose its water absorption effect even after repeated washing, can be dyed vividly, and has high color fastness. This underwear is made of a fabric mainly made of polyester fiber or a non-woven fabric that has excellent properties. Additionally, a product with excellent urine temperature properties can be obtained.

[Brief explanation of drawings]

1 and 2 are schematic diagrams illustrating the cross-sectional shape of the fibers of the water-absorbing polyester I&l constituting the underwear of the present invention, and FIG. 1 is a schematic diagram of the flat cross-sectional shape. L indicates the maximum length of the cross section, and W indicates the maximum width. Further, Fig. 2 is a schematic diagram of an irregular cross-sectional shape having a recess, where d connects both ends of the opening of the recess, S<shortest distance, and 2 represents the distance from the opening to the deepest part of the recess. It is something that

Claims (1)

[Claims] (1) Underwear whose main constituent fibers are polyester fibers containing 0.2 to 10% by weight of polyoxyalkylene glycol and 0.1 to 5% by weight of a sulfonic acid metal salt derivative, each having an average molecular weight of at least 800.