Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
  • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
  • D01F6/86—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from polyetheresters
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber

Definitions

• the present invention relates to a polyether ester elastic fiber having good moisture absorption / desorption properties, reversibly expanding and contracting due to water absorption / desorption, and capable of obtaining a cloth exhibiting conventional comfort and comfort especially for sports use, diner use and the like. Things. Background technology
• polyurethane elastic fibers have been mainly used as elastic fibers for clothing and industrial materials, but have the disadvantage of poor heat resistance, chemical resistance, and weather resistance (light).
• a dry spinning process is required in manufacturing, solvent recovery is required, and there is a problem that low productivity and energy are consumed.
• polyurethane elastic fibers are difficult to recycle and generate harmful gases during combustion, which poses many challenges for the future of a recycling-oriented society.
• polyetherester elastic fibers those having an elastic performance comparable to that of polyurethane elastic fibers include polyesterester elastic fibers using polybutylene terephthalate as a hard segment and polyoxybutylene glycol as a soft segment. It is used. However, both these hard and soft segments are generally hydrophobic, Almost no polyetherester elastic fibers having hydrophilic properties such as water absorption have been put to practical use.
• the present invention has been made on the background of the above-mentioned conventional technology.
• the object of the present invention is to obtain a fabric that has good hygroscopicity, expands and contracts reversibly largely by absorbing and discharging water, and has excellent comfort.
• An object of the present invention is to provide a polyetherester elastic fiber, a fabric using the same, and clothing.
• the object of the present invention can be achieved in the following polyetherester elastic fibers.
• R 1 is an aromatic hydrocarbon group or an aliphatic hydrocarbon group, and X 1 is an ester formed
• X 2 represents an ester-forming functional group or a hydrogen atom which is the same or different from X 1
• Ml represents an alkali metal or an alkaline earth metal
• i represents 1 or 2.
• R 2 represents an aromatic hydrocarbon group or an aliphatic hydrocarbon group
• M 2 represents an alkali metal or an alkaline earth metal salt.
• polyester fiber according to 2 wherein the copolymerization amount of the metal organic sulfonic acid salt is in the range of 0.1 to 20 mol% based on the acid component constituting the polyetherester elastomer. .
• the elastic fiber has two crystal melting peaks in the DSC curve obtained by the differential scanning calorimeter, and the ratio of the crystal melting peak height Hm1 on the low temperature side to the crystal melting peak height Hm2 on the high temperature side Hm lZHm2 Is in the range of 0.6 to 1.2, and the elongation at break is 400% or more.
• an oil agent based on the weight of the fiber is adhered to the surface of the elastic fiber, and the oil agent is selected from the group consisting of mineral oil, silicone, and aliphatic ester. At least one leveling agent is present in an amount of 70 to 100% by weight of the oil agent; The ether-based or ester-based nonionic surfactant is used in an amount of 0.0 to 30% by weight of the oil agent. /.
• the polyether polyester elastic fiber according to any one of 1, 2, and 6 above.
• a fabric comprising at least a part of the polyetherester elastic fiber according to any one of 1, 2, and 6.
• the elastic fiber of the present invention is an elastic fiber made of a polyetherester elastomer having polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment.
• the polybutylene terephthalate which is a hard segment, preferably contains at least 70 mol% of butylene terephthalate units.
• the content of polybutylene terephthalate tallate more preferably 8 0 mole 0/0 or more, and further preferably 9 0 molar% or more.
• polybutylene terephthalate may be copolymerized with other components within a range that does not substantially impair the achievement of the object of the present invention.
• copolymerization components include, for example, naphthalenedicarboxylic acid, isophthalic acid, diphenyldicarboxylic acid, diphenyloxyethanedicarboxylic acid, j3-hydroxybenzoic acid, p-oxybenzoic acid, and adipic acid.
• aromatic, aliphatic and alicyclic dicarboxylic acid components such as, sebacic acid and 1,4-cyclohexanedicarboxylic acid.
• a polycarboxylic acid having three or more functionalities such as trimellitic acid, pyromellitic acid,... May be used as a copolymer component.
• the diol component includes, for example, trimethylene glycol ⁇ , ethylene glycolone, cyclohexane-11, Aliphatic, alicyclic and aromatic diol components such as 4-dimethanol and neopentyldaricol can be mentioned.
• a trifunctional or higher functional polyol such as glycerin, trimethylolpropane, or pentaerythritol may be used as a copolymer component.
• the polyoxyethylene glycol as the soft segment preferably contains at least 70 mol% or more of the xyshethylene glycol unit.
• the content of oxyethylene glycol is more preferably at least 80 mol%, and most preferably at least 90 mol%.
• the above polyoxyethylene glycol may be copolymerized with, for example, propylene glycol, tetramethylene glycol, glycerin and the like within a range that does not substantially impair the achievement of the object of the present invention.
• the number average molecular weight of the above-mentioned polyoxyethylene glycol is preferably from 400 to 800, and particularly preferably from 100 to 600.
• the weight ratio of the hard segment to the soft segment is preferably in the range of 70:30 to 30:70, more preferably 60:40 to 40:60. Range. If the weight ratio of the hard segment exceeds 70%, the elongation of the elastic fiber becomes low, making it difficult to use it for high stretch applications, and the hygroscopicity tends to decrease. If the weight ratio of the hard segment is less than 30%, the strength of the polybutylene terephthalate crystal part tends to decrease due to a decrease in the ratio of the polybutylene terephthalate crystal part. This makes it difficult to perform high-order processing steps such as scouring and dyeing, and poor washing fastness when used as a product.
• the elastic fiber has a moisture absorption rate of 5% or more at 35 ° C. and 95% RH and a water absorption elongation rate of 10% or more.
• the woven or knitted fabric made of such elastic fibers when the sweat or the like is absorbed, the fibers are stretched, the eyes of the woven or knitted fabric are opened, the humidity inside the clothing is released, and the fibers are shrunk when dried. The length of the woven and knitted fabric is closed, and the temperature inside the garment is not released, so that the fabric has a so-called self-regulating function and is excellent in comfort.
• the moisture absorption is less than 5%, stickiness and stuffiness may occur, and if the water absorption elongation is less than 10%, the reversible elongation and shrinkage characteristics due to water absorption / desorption become insufficient, and the woven or knitted fabric is fully opened.
• a fabric with excellent suitability cannot be obtained without closing or closing.
• the elastic fiber of the present invention which may be the above-mentioned polyester ester, if the above-mentioned moisture absorption rate or water absorption elongation rate becomes too large, the elasticity, heat resistance, weather (light) resistance, chemical resistance, etc. Tends to worsen.
• the moisture absorption is preferably in the range of 5 to 45%, and more preferably in the range of 10 to 40%.
• the water absorption elongation is preferably in the range of 10 to 100%, more preferably in the range of 10 to 80%, and still more preferably in the range of 15 to 60%.
• an oil agent is attached to the surface of the elastic fiber based on the weight of the fiber, and the oil agent comprises mineral oil, silicone, and an aliphatic ester.
• the at least one leveling agent selected is 70 to 100% by weight of the oil agent. Preferably it occupies / 0 .
• the above-mentioned smoothing agents such as mineral oil, silicone, and aliphatic ester rarely swell elastic fibers, do not increase friction and decrease mechanical properties due to this, and maintain process stability in the spinning and post-processing steps. It will be good.
• the content of these leveling agents (or the total content of these when using a plurality of types) is 70 to 100% by weight.
• the silicone is preferably a polydimethyl shea siloxane, 3 0 the viscosity at ° C by the same reason as in the case of the mineral oil in 5 X 1 0 one 6 ⁇ 4 X 1 0 one 5 m 2 / s Some are preferred.
• the above-mentioned aliphatic ester is a compound such as a monoalkyl ester of an aliphatic acid, a dialkyl ester of an aliphatic dicarboxylic acid, or a mono- or poly-fatty acid ester of an aliphatic polyhydric alcohol, and has a molecular weight of 250 to 550. Are preferred. By setting the molecular weight within the above range, high smoothness can be maintained.
• fatty acid monoalkyl esters include octyloctoanoate, octylstearate, isotridecyl laurate, isotridecylolate, lauryloleate And the like.
• aliphatic dicarboxylic acid dialkyl ester examples include diisooctyl azide ", and the like, and the aliphatic polyhydric alcohol mono- or poly-fatty acid esters include trimethylolpropane trioctanate.
• fatty acid monoalkyl esters are preferred.
• an ether or ester of a nonionic surfactant 3 ⁇ 4 agent is preferably one viscosity at 3 0 ° C is 8 X 1 0- 6 ⁇ 5 X 1 0- 5 m 2 / s.
• ether nonionic surfactants include polyalkylene glycol alkyl ethers and polyalkylene glycol aryl ethers.
• ester nonionic surfactants polyhydric alcohol partial ester alkyl ester Examples thereof include an oxide adduct, and among them, polyalkyleneglycolalkyl ether is preferable.
• the carbon number of the alkyl group is in the range of 8 to 20
• the elastic fibers are less likely to swell, and high smoothness can be achieved at the same time.
• the alkylene group of the polyalkylene glycol chain preferably has 2 to 3 carbon atoms, particularly preferably 2 carbon atoms, and the chain number (the number of moles of ethylene oxide added to the alcohol) is suitably in the range of 3 to 20. .
• the compatibility with the above-mentioned leveling agent composed of mineral oil, silicone or aliphatic ester does not decrease.
• the 3 0 ° viscosity at C is 5 X 1 0- 6 ⁇ 2 X 1 0 -
• the 3 0 ° viscosity at C is 5 X 1 0- 6 ⁇ 2 X 1 0 -
• the surfactant may not necessarily be contained in the oil agent, but if the viscosity exceeds 2 ⁇ 10-5 m 2 / s, the nonionic surfactant is contained in an amount of 30% by weight or less. Is preferred in terms of handling.
• the oil agent used in the present invention is composed of the above-mentioned components. However, if necessary, a small amount of other compounding agents may be added as long as the object of the present invention is not impaired. For example, a small amount of a smoothing aid such as another nonionic surfactant, anionic or cationic ion surfactant, an antioxidant, or a stability improver such as an ultraviolet absorber may be added.
• a smoothing aid such as another nonionic surfactant, anionic or cationic ion surfactant, an antioxidant, or a stability improver such as an ultraviolet absorber may be added.
• the above oil agent used in the present invention preferably has a viscosity at 30 ° C. of 5 ⁇ 10 16 to 4 ⁇ 10 15 m 2 Zs.
• the oil If the viscosity at 30 ° C of agent 2 X 1 0- 5 ⁇ 4 X 1 0 _5 ni 2 / s and higher, when given when spinning Re 'this as neat oils, for example by warming 2 X 10 — 5 It is preferred to be ⁇ 2 / s or less. However, if the oil is heated to an excessively high temperature, the physical properties of the obtained fiber are affected, and it is preferable to keep the oil at a maximum of 60 ° C in Anno.
• the adhesion amount of the elastic fibers of the oil is 0.1 preferably based on the said fibers by weight 5 to 5.0 wt 0/0, more preferably at 1.0 to 4.0 wt 0/0 In this way, troubles such as yarn breakage and scum generation during yarn production hardly occur, and the process stability is improved.
• the high moisture absorption and high water absorption elongation described above can be obtained by copolymerizing the above polyetherester elastomer with a metal salt of an organic sulfonic acid represented by the following general formula (1) and increasing the intrinsic viscosity of the elastic fiber to 0.9 or more. By doing so, it can be achieved more easily.
• R 1 is an aromatic hydrocarbon group or an aliphatic hydrocarbon group, preferably an aromatic hydrocarbon group having 6 to 15 carbon atoms or an aliphatic hydrocarbon group having 10 or less carbon atoms. Particularly preferred R 1 is an aromatic hydrocarbon group having 6 to 12 carbon atoms, particularly a benzene ring.
• Ml is an alkali metal or alkaline earth metal, and j is 1 or 2. Among them, those in which Ml is an alkali metal (for example, lithium, sodium or potassium) and j is 1 are preferred.
• X 1 represents an ester-forming functional group
• X 2 represents the same or different ester-forming functional group or a hydrogen atom as XI, and is preferably an ester-forming functional group.
• the ester-forming functional group may be any group that reacts with and bonds to the main chain or terminal of the polyetherester, and specific examples include the following groups.
• R ′ represents a lower alkyl group or a phenyl group, a and d each represent an integer of 1 to 10, and b represents an integer of 2 to 6.
• Preferred specific examples of the organic metal sulfonic acid salt represented by the above general formula (1) include sodium 3,5-dicarboxymethoxybenzenesulfonate, potassium 3,5-dicarboxymethoxybenzenesolenoate, and 3,5-dicanolepomethoxy.
• copolymerization of an organic sulfonic acid metal salt represented by the following general formula (2) can easily increase the intrinsic viscosity of the polyester ester elastomer to 0.9 or more. Further, it is preferable since the moisture absorption rate and the water absorption elongation rate of the obtained elastic fiber can be significantly increased. According to our research, it is possible to achieve an extremely high level such as a water absorption elongation of 20% or more by copolymerizing such an organic sulfonic acid metal salt, and to easily obtain a more comfortable fabric. all right. HO-CH 2 -CH 2 -OCO-R 2 -COO-CH 2 -CH 2 -OH
• R 2 is an aromatic hydrocarbon tomb or an aliphatic hydrocarbon group, are as defined for R 1 in the general formula (1) described above, M 2 is an alkali metal or alkaline earth It is a kind of metal and has the same definition as Ml in the general formula (1) described above.
• Preferred specific examples of such an organic metal sulfonate include sodium 3,5-di (j3-hydroxyethoxycarbonyl) benzenesulfonate, potassium 3,5-di (j3-hydroxyethoxycarbonyl) benzenesulfonate, 3,5-di (j3-hydroxyethoxycarbonyl) lithium benzenesulfonate and the like are exemplified.
• the copolymerization amount of the organic sulfonic acid metal salt is too large, the melting point of the elastic fiber tends to decrease, and the heat resistance, weather resistance (light) resistance, chemical resistance, and the like tend to decrease.
• the content is preferably in the range of 0.1 to 20 mol% based on all the acid components constituting one. Conversely, if the copolymerization amount is too small, the moisture absorption rate and the water absorption elongation rate tend to decrease, and the content is more preferably in the range of 0.5 to 15 mol%.
• the polyetherester elastomer used in the present invention is obtained, for example, by subjecting a raw material containing dimethyl terephthalate, tetramethylene glycol and polyoxetylene glycol to a transesterification reaction in the presence of a transesterification catalyst to obtain a bis ( ⁇ - (Hydroxybutyl) terephthalate and Z or oligomer can be formed, and then melt polycondensation is performed under reduced pressure at high temperature in the presence of a polycondensation catalyst and a stabilizer.
• an alkali metal salt such as sodium, an alkaline earth metal salt such as magnesium or calcium, or a metal compound such as titanium, zinc or manganese.
• the polycondensation catalyst it is preferable to use a germanium compound, an antimony compound, a titanium compound, a cobalt compound, and a tin compound.
• the amount of the catalyst used is not particularly limited as long as it is an amount necessary for the progress of the transesterification reaction and the polycondensation reaction, and a plurality of catalysts can be used.
• the fact that the above-mentioned hindered phenol-based compound / hindered amine-based compound is added to the polyether ester not only suppresses the decrease in the intrinsic viscosity of the polymer during melt spinning, but also obtains the obtained polymer. It also has the effect of suppressing thermal deterioration, oxidation deterioration, light deterioration, and the like of the elastic fiber, and is more preferable.
• the use of a hindered phenolic compound having a double bond in the molecule represented by the following general formula (3) has an effect of accelerating the polycondensation reaction of the polyetherester elastomer of the present invention. It is more preferable because an elastic fiber having a high intrinsic viscosity can be easily obtained, and a polyetherester elastic fiber having high moisture absorption and water elongation can be easily produced.
• the substituents R 3 and R 4 each independently represent a monovalent organic group having 1 to 6 carbon atoms, wherein one or both of the substituents R 3 and R 4 are plural.
• the plurality of substituents may be the same or different, and m and n are each independently an integer of 0 to 4, and R 5 is a hydrogen atom Or an organic group having 1 to 5 carbon atoms.
• hindered funinol-based compound having a double bond in the molecule examples include the following compounds (4) to (7). Above all, those represented by the following formula (4) are particularly preferable because the above-mentioned elastic fibers having high hygroscopicity and water-absorbing extensibility can be easily obtained.
• tC 4 H 3 is ⁇ -CH 3 .
• the transesterification catalyst can be supplied not only at the time of preparing the raw materials but also at an early stage of the transesterification reaction. Further, the stabilizer is preferably added at the end of the transesterification reaction, which can be performed by the early stage of the polycondensation reaction. Further, the polycondensation catalyst can be supplied by the beginning of the polycondensation reaction step. .
• the method of increasing the intrinsic viscosity of the elastic fiber to 0.9 or more may be a method of solid-state polymerization of a polyetherester elastomer, a synthesis step of a polyesterether elastomer, or a melt spinning step.
• a method using a chain extender can also be adopted.
• Preferable specific examples of the chain extender used at this time include oxazoline compounds such as 2,2′-bis (2-oxazoline) and N, N′-telephthaloylbiscaprolactam.
• the elastic fiber preferably has an intrinsic viscosity of 0.9 or more, in addition to the polyether ester elastomer described above.
• the intrinsic viscosity is 0.9 or more, extremely high moisture absorption and water absorption elongation can be realized, and a fabric excellent in comfort can be easily obtained.
• the intrinsic viscosity is more preferably in the range of 0.9 to 1.2.
• the elongation at break of 400% or more allows the hygroscopicity to be 5% or more and the water absorption elongation to be 10% or more. This is preferable in that the number of thread breaks caused by a large press can be reduced.
• the elongation at break is preferably in the range of 400 to 900%, more preferably in the range of 400 to 800%.
• the boiling water shrinkage of the elastic fiber be 10% or more in order to make the hygroscopicity 5% or more and the water absorption elongation 10% or more.
• the elastic fiber of the present invention melts and extrudes a pelletized polyetherester from a spinneret, and keeps the temperature at least 10 cm, preferably at least 15 cm directly below the spinneret.
• Apply oil at a position within 5 m, preferably within 4 m from directly below the base take off at a take-up speed of 300 to 120 OmZ, preferably 400 to 98 ⁇ / min, and further increase the take-up draft rate. It can be manufactured by winding at a take-up speed of 1.3 to 1.6, preferably 1.4 to 1.5.
• the tension applied to the fibers between the godet rollers and between the godet rollers and the winding machine is insufficient, and the fibers are wound around the godet rollers and are not preferable.
• keep the temperature under the base, keep the spinning speed as low as possible do not increase the distance to the oiling device so that the orientation does not advance, and as much as possible the elastic fibers after pulling out
• the elastic fiber is made of polyether ester substantially not copolymerized with an organic metal sulfonate, the moisture absorption at 35 ° C and 95% RH is 5% or more, and the water absorption elongation is 10% or more. Elastic fiber.
• the elastic fiber has two crystal melting peaks in the DSC curve obtained by the differential scanning calorimeter, the crystal melting peak height Hxn1 on the low temperature side and the crystal g peak height on the high temperature side.
• the ratio Hml / Hm2 is in the range of 0.6.1.2 and the elongation at break is 400% or more, the high moisture absorption and water absorption elongation described above can be easily achieved.
• the ratio of the hard segment to the soft segment of the polyetherester is 30:70 70:30 based on the weight, but the ratio of the hard segment is 70% by weight or less. It is preferable to set the ratio of HmlZHm2 to 1.2 or less.
• HmlZHm2 As described above, the reason why Hml / Hin2 in the range of 0.6.1.2 shows high moisture absorption rate and high water absorption elongation rate is as follows. It is considered that the two crystal melting peaks are due to the existence of two types of crystals having large differences in size. The peak on the low temperature side has the melting temperature peak of the crystal with small size, and the peak on the high temperature side has the large size with the large size.
• the water absorption is sufficient and the moisture absorption rate and water absorption elongation are significantly improved.
• the ratio of 111111/111112 is 0.6 or more, the number of crystal cross-linking points does not decrease too much, the elongation elasticity of the fiber is maintained high, and it is at a practical level as the physical properties of the fiber.
• a more preferred range of hml / Hm2 is from 0.8 to 1 2 Mel at 0 -.
• maintenance is preferred and this temperature Tm 1 and Tm2 is 200 ° C or more two crystal melting peak, sufficient heat resistance it can.
• the crystal melting peak temperature Tml and ⁇ 2 are preferably 225 ° C or lower, and the elasticity of the fiber can be increased. This is probably because Tml and Tm2 have such a relationship because the crystal size does not become too large and the number of crystal cross-linking points does not decrease too much.
• the elastic fiber preferably has an elongation at break of 400% or more, more preferably in the range of 500 to L000%, and still more preferably in the range of 60 to 900%.
• the elongation at break is 400% or more, higher moisture absorption and water elongation can be achieved.
• the elastic fiber is hard to be broken even by a slight press under the above conditions.
• the elastic fibers having the two crystal melting peak temperatures described above are obtained, for example, by melting and extruding pelletized polyetherester from a spinneret, and at least 10 cxn, preferably at least 15 cm, from directly below the spinneret. Keep oil warm during the period, apply oil at a position within 5 m, preferably within 4 m immediately below the base, and take off at a take-off speed of 300 to 1200 m / min, preferably 400 to 98 OmZ, It can be manufactured by winding the wire at a draft rate of 1.0 to 1.2, preferably 1.0 to 1.1 at the winding speed.
• the temperature under the base is kept low, the spinning speed is kept as low as possible, the distance to the oiling device is not long, the orientation does not advance, and the elasticity after pulling
• the winding draft should be as small as possible so that the fibers are not stretched as much as possible, without increasing the size of crystals, and the height of the two crystal melting peaks mentioned above in the range of 0.6 to 1.2 When It is preferable in doing. From the viewpoint of strength, it is not preferable to stretch or further heat-treat the polyetherester elastic fiber after winding it, or continuously after the winding.
• the sample was conditioned for 24 hours in a constant temperature and humidity chamber adjusted to predetermined conditions, and the moisture absorption was determined from the weight of the absolutely dry sample and the weight of the humidity-conditioned sample according to the following equation.
• Moisture absorption (%) (weight of moisture-conditioned sample-weight of absolutely dry sample) X I ooz Weight of absolutely dry sample
• the fiber is squeezed, boiled for 30 minutes under no tension, air-dried at 20 ° C and 65% RH, conditioned and then heat-treated under non-stress at 160 ° C in a non-tensile environment for 2 minutes without tension. was left for 24 hours in 20 ° C65 of RH% environment, the length of the yarn was measured by applying a load of 0. 88X 10- 3 cNZ dtex to as "length of the yarn during drying", then this After immersing the yarn in softened water adjusted to 20 ° C for 1 minute, pull it out of the water, sandwich the moisture remaining on the fiber surface with filter paper air-dried at 20 ° C 65% RH, and place it on a horizontal table and left at by 1.
• Water absorption elongation rate (length of yarn when absorbing water-length of yarn when dried) ⁇ length of yarn when dried X I 00%
• the "length of the dried yarn” was measured, and then the measured yarn was conditioned for 24 hours in a thermo-hygrostat adjusted to .35 ° C and 95% RH.
• the length measured by applying a load of 0. 88 X 10- 3 cN Bruno dtex in the chamber and the "length of the yarn at the time of moisture absorption" was calculated moisture absorption elongation by the following formula.
• Elongation rate of moisture absorption (length of yarn when moisture is absorbed-length of yarn when dried) ⁇ length of yarn when dried XI 00%
• the measurement was carried out by performing a tensile test using a Tensilon RTM-100 tensile tester manufactured by Toyo Paul Douin Co., Ltd. in a constant temperature and humidity room adjusted to 20 ° C. and 65% RH. '
• the elastic fiber was formed into a knit of 132 g / m 2 using a tubular knitting machine. After leaving the kit for 24 hours in an environment of 20 ° C and 5% RH, immerse it in softened water of 20 ° C for 1 minute and remove it from the water. After knitting and removing, the openings of each knit were observed. As a result, it was confirmed that the opening of the knit became large after immersion in the softened water.
• An elastic fiber having an intrinsic viscosity of 1.16 was obtained in the same manner as in Example 1 except that polyoxyethylene glycol (number average molecular weight 2000) was used instead of polyoxyethylene glycol (number average molecular weight 4000).
• Table 1 shows the results.
• the amount of copolymerization of 5-Na sulfoisophthalenoic acid dihydroxyxetyl ester (3,5-di-hydroxyethoxycarbonyl) is the same as sodium benzenesulfonate, and the total acid component of the polyetherester elastomer 2. except that the 0 mole 0/0 the same manner as in example 1, the intrinsic viscosity was obtained polyether one ether esters elastic filament of 1.1 8 against. Table 1 shows the results.
• the elastic fiber obtained in the same manner as in Example 1 was stretched at a draw ratio of 2.0 between two non-heating rollers to obtain a wound elastic fiber. Table 1 shows the results.
• the elastic fiber obtained in Example 1 was formed into a circular knit (smooth) having a density of 52 threads / 2.54 cm and a weft density of 60 threads / 2.54 cm, and was used for the armpit and the chest. , And men's underwear and sports @ your (both upper body) were created. Five underwear and sportswear were worn by each of them, and they exercised for 2 hours.Everything was less sticky and uncomfortable than those without the above-mentioned elastic fiber. The suitability was excellent. '
• Elastic fibers were obtained in the same manner as in Example 7, except that the ratio of the polyoxyethylene glycol, the spinning speed, and the winding speed were changed as shown in Table 2. Table 2 shows the results. Further, the apertures of the sheets before and after moisture absorption and before and after water absorption were respectively observed in the same manner as in Example 7, but it was confirmed that the voids were larger in Examples 8 to 11 as in Example 7. However, in Comparative Example 4, the voids hardly changed.
• the elastic fiber of the present invention is excellent in recyclability since it is made of polyetherester.
• the elastic fiber of the present invention has good moisture absorption and desorption properties and reversibly expands and contracts due to water absorption and desorption. A fabric can be obtained.
• the above-mentioned elastic fiber is used as clothing, and exhibits excellent performance particularly in applications such as sports clothing, innerwear, lining, stockings, and socks.

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• 2004
  • 2004-06-18 WO PCT/JP2004/008940 patent/WO2004113599A1/ja active Application Filing
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