Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
  • D01D5/30—Conjugate filaments; Spinnerette packs therefor
  • D01D5/32—Side-by-side structure; Spinnerette packs therefor
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
  • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
  • D04H3/147—Composite yarns or filaments
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/098—Melt spinning methods with simultaneous stretching
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/10—Melt spinning methods using organic materials
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/12—Stretch-spinning methods
  • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
  • D01D5/30—Conjugate filaments; Spinnerette packs therefor
  • D01D5/34—Core-skin structure; Spinnerette packs therefor
• • 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
  • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
  • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
  • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/005—Synthetic yarns or filaments
  • D04H3/009—Condensation or reaction polymers
  • D04H3/011—Polyesters
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/06—Load-responsive characteristics
  • D10B2401/061—Load-responsive characteristics elastic

Definitions

• the present invention (the first invention and the second invention) relates to a long-fiber nonwoven fabric and a method for producing a long-fiber nonwoven fabric.
• Patent Document 1 states that a polymer composed of two components, polybutylene terephthalate and polyethylene terephthalate, and long fibers having crimps are fused and fixed by a low melting point component in an intermittent region.
• the apparent density is 0.10 g / cm 3 or more
• the strength at 50% elongation in the vertical and horizontal directions is 150 g / cm or less
• the elongation recovery rate at 50% elongation is 50% or more.
• a long fiber non-woven fabric is disclosed.
• Patent Document 2 includes short fibers made of composite fibers in which a specific copolymerized polyethylene terephthalate (A) and polyethylene terephthalate (B) are bonded side by side, and has an elongation rate of 60% or more and an elongation recovery rate of 55. % Or more non-woven fabrics are disclosed.
• Patent Document 1 As a method for producing a long fiber non-woven fabric, as disclosed in Patent Document 1, a crimp expression treatment is performed on a long fiber web collected on a net, and then crimp expression is performed.
• a method is known in which a long fiber web is subjected to thermocompression bonding and bonding treatment using an embossed roll, and fused and fixed by a low melting point component in an intermittent region.
• the present invention (the first invention and the second invention) has been made in view of the above-mentioned problems, and the purpose thereof is to be a long fiber nonwoven fabric containing polyethylene terephthalate and a copolymerized polyester. It is an object of the present invention to provide a long fiber non-woven fabric having a high bulk density and excellent elasticity. Another object of the present invention is to provide a method for producing the long fiber nonwoven fabric.
• the present inventors have conducted intensive research on long-fiber non-woven fabrics containing polyethylene terephthalate and copolymerized polyester. As a result, it has been found that a long-fiber nonwoven fabric having a high bulk density and excellent elasticity can be obtained by adopting a novel manufacturing method, and the present invention (the first invention and the second invention). The present invention) has been completed.
• the first invention provides the following. (1) It is composed of long fibers of a two-component composite spun containing polyethylene terephthalate and a copolymerized polyester. The apparent density is 0.1 g / cc or more and 0.25 g / cc or less. A long fiber non-woven fabric characterized by having an elongation recovery rate of 55% or more at the time of 50% elongation.
• the long fiber web containing the copolymerized polyester is prone to shrinkage and shrinkage due to heat. Therefore, in the conventional method for producing a long fiber non-woven fabric, the length has a high bulk density and excellent elasticity. It was not possible to obtain a fibrous non-woven fabric.
• embossing is performed at 185 ° C. or higher, but when such embossing at a high temperature is applied to a long fiber web containing a copolymerized polyethylene terephthalate, it is caused by abrupt shrinkage. Wrinkles will occur.
• the long fiber web containing the copolymerized polyester is temporarily crimped, and then the temporarily crimped long fiber web is crimped to obtain bulk density. It has become possible to obtain a long-fiber non-woven fabric having high elasticity and excellent elasticity.
• the polyethylene terephthalate and the copolymerized polyester are contained, the apparent density is 0.1 g / cc or more and 0.25 g / cc or less, and the elongation at the time of 50% elongation is extended. It is possible to provide a long fiber non-woven fabric having a recovery rate of 55% or more.
• the apparent density is 0.1 g / cc or more, even if it rubs against clothing when used as a patch or bandage, it is less susceptible to friction and may cause creases during use. Can be prevented. Further, since the elongation recovery rate at the time of 50% elongation is 55% or more, it is excellent in elasticity and has a good usability when used as a patch or bandage.
• the 5% extension load is preferably 1.0 N / 25 mm or less.
• the 5% extension load is 1.0 N / 25 mm or less, it is possible to facilitate bending of joints such as elbows when used as a patch or bandage.
• the long fiber is preferably a crimped yarn.
• the long fiber is a crimped yarn, more excellent elasticity can be obtained.
• the long fibers preferably have a core-sheath structure.
• the long fiber has a core-sheath structure, it can be suitably crimped at the time of manufacture.
• the center of the core component is eccentric by 2% or more in the core sheath structure.
• the center of the core component is eccentric by 2% or more, it becomes possible to more preferably perform the crimping process at the time of manufacturing.
• the long fibers preferably have a side-by-side structure.
• the long fiber has a side-by-side structure, it can be suitably crimped at the time of manufacture.
• the first long fiber nonwoven fabric according to the present invention is obtained by temporarily crimping a long fiber web containing a copolymerized polyester and then subjecting the temporarily crimped long fiber web to a crimping process.
• Amorphous polyester has a characteristic that it is difficult to adhere up to around 130 ° C., and it is difficult for restraint due to the adhesion point to occur. Therefore, in the crimping process, expansion and contraction first develops. Then, it can be brought into close contact with the expansion and contraction. Therefore, no mechanical confounding process is required. In the case of a configuration that is not subjected to mechanical entanglement processing, it can be manufactured at low cost. Further, as compared with the case where the needle punch is adopted as the mechanical entanglement processing, it is possible to avoid the risk of the needle needle being mixed.
• the copolymerized polyester has a dicarboxylic acid component of terephthalic acid and a glycol component of 50 to 85 mol% ethylene glycol and 15 to 50 mol% neopentyl glycol. It is preferable to have.
• the dicarboxylic acid component of the copolymerized polyester is terephthalic acid and the glycol component is 50 to 85 mol% of ethylene glycol and 15 to 50 mol% of neopentyl glycol, the crystallinity is appropriately lowered, which is suitable for long-fiber nonwoven fabrics. Can develop various crimps.
• the long-fiber nonwoven fabric can be suitably used as a base cloth for a patch.
• the second invention also provides the following. (10) It is composed of long fibers of a two-component composite spun containing polyethylene terephthalate and a copolymerized polyester.
• the apparent density is 0.1 g / cc or more,
• the long fiber web containing the copolymerized polyester is prone to shrinkage and shrinkage due to heat. Therefore, in the conventional method for producing a long fiber non-woven fabric, the length has a high bulk density and excellent elasticity. It was not possible to obtain a fibrous non-woven fabric.
• the second invention as will be described in detail later, after the long fiber web containing the copolymerized polyester is temporarily crimped, the temporarily crimped long fiber web is crimped to increase the bulk density. It has become possible to obtain a long fiber non-woven fabric that is high and has excellent elasticity.
• the length which contains polyethylene terephthalate and the copolymerized polyester is 0.1 g / cc or more, and the elongation recovery rate of 10% is 65% or more.
• a fibrous non-woven fabric can be provided. Since the apparent density is 0.1 g / cc or more, even if it rubs against clothing when used as a patch or bandage, it is less susceptible to friction and may cause creases during use. Can be prevented. Further, since the elongation recovery rate of 10% is 65% or more, the elasticity is excellent, and the feeling of use is good when used as a patch or bandage.
• the long fiber is preferably a crimped yarn.
• the long fiber is a crimped yarn, more excellent elasticity can be obtained.
• the long fibers preferably have a core-sheath structure.
• the long fiber has a core-sheath structure, it can be suitably crimped at the time of manufacture.
• the center of the core component is eccentric by 2% or more in the core sheath structure.
• the center of the core component is eccentric by 2% or more, it becomes possible to more preferably perform the crimping process at the time of manufacturing.
• the long fibers preferably have a side-by-side structure.
• the long fiber has a side-by-side structure, it can be suitably crimped at the time of manufacture.
• the long fiber nonwoven fabric according to the second invention is obtained by temporarily crimping a long fiber web containing a copolymerized polyester and then subjecting the temporarily crimped long fiber web to a crimping process, as will be described in detail later. Be done.
• Amorphous polyester has a characteristic that it is difficult to adhere up to around 130 ° C., and it is difficult for restraint due to the adhesion point to occur. Therefore, in the crimping process, expansion and contraction first develops. Then, it can be brought into close contact with the expansion and contraction. Therefore, no mechanical confounding process is required. In the case of a configuration that is not subjected to mechanical entanglement processing, it can be manufactured at low cost. Further, as compared with the case where the needle punch is adopted as the mechanical entanglement processing, it is possible to avoid the risk of the needle needle being mixed.
• the copolymerized polyester has a dicarboxylic acid component of terephthalic acid and a glycol component of 50 to 85 mol% of ethylene glycol and 15 to 50 mol% of neopentyl glycol. It is preferable to have.
• the dicarboxylic acid component of the copolymerized polyester is terephthalic acid and the glycol component is 50 to 85 mol% of ethylene glycol and 15 to 50 mol% of neopentyl glycol, the crystallinity is appropriately lowered, which is suitable for long-fiber nonwoven fabrics. Can develop various crimps.
• the present invention provides the following.
• (17) The method for producing a long fiber nonwoven fabric according to the above (1) to (16).
• Step B in which the long fibers obtained in the step A are collected to form a long fiber web
• Step C of temporarily crimping the long fiber web
• a method for producing a long fiber non-woven fabric which comprises a step D of subjecting the temporarily crimped long fiber web to a crimping process.
• the conventional method for producing a long fiber nonwoven fabric obtains a long fiber nonwoven fabric having a high bulk density and excellent elasticity. I wouldn't.
• the present invention after the long fiber web containing the copolymerized polyester is temporarily crimped, the temporarily crimped long fiber web is crimped. This makes it possible to obtain a long-fiber non-woven fabric having a high bulk density and excellent elasticity.
• the step D is a step of immersing the long fiber web in boiling water at 80 ° C. or higher.
• the long fibers By immersing the long fiber web in boiling water at 80 ° C. or higher, the long fibers can be suitably crimped.
• a long fiber nonwoven fabric having a thickness corresponding to the draw ratio can be obtained. That is, the thickness of the obtained long fiber nonwoven fabric can be adjusted by the stretching ratio in the lateral direction.
• the thickness of the obtained long fiber nonwoven fabric can be more preferably adjusted by the distance between the rolls of the calendar processing. In addition, the thickness can be made uniform.
• the distance between rolls for calendar processing in the step F is preferably 0.1 mm or more.
• the distance between the rolls of the calendar processing in the step F is 0.1 mm or more, it is possible to suppress the deterioration of the expansion / contraction function and the improvement of the initial tensile stress due to the excessive pressure bonding of the fibers.
• the step D winds the long fiber web on the long fiber web while gradually reducing the speed ratio by using two or more heating rollers whose temperature modulation and speed ratio can be changed. It is preferable that the process is a shrinking process.
• the long fiber web is crimped while gradually reducing the speed ratio using two or more heating rollers whose temperature modulation and speed ratio can be changed, the long fiber is suitably crimped. Can be done.
• the eccentric core sheath nozzle is used as the spinneret, and the polyethylene terephthalate as the core component and the copolymerized polyester as the sheath component are used. It is preferable to include the step A-1 of discharging from the eccentric core sheath nozzle.
• step D When the eccentric core sheath nozzle is used as the spinneret and the polyethylene terephthalate as the core component and the copolymerized polyester as the sheath component are discharged from the eccentric core sheath nozzle, a subsequent crimping process (step D) is performed. In, it becomes possible to appropriately perform the crimping process.
• step A a side-by-side nozzle is used as the spinneret, and the polyethylene terephthalate and the copolymerized polyester are bonded side-by-side in the fiber length direction.
• step A-2 of discharging from the side-by-side nozzle.
• step D When a side-by-side nozzle is used as the spinneret and the polyethylene terephthalate and the copolymerized polyester are ejected from the side-by-side nozzle so as to be bonded to each other in a side-by-side manner in the fiber length direction, it is suitable for the subsequent crimping process (step D). Can be crimped.
• the copolymerized polyester has a dicarboxylic acid component of terephthalic acid and a glycol component of 50 to 85 mol% of ethylene glycol and 15 to 50 mol% of neopentyl glycol. It is preferable to have.
• the dicarboxylic acid component of the copolymerized polyester is terephthalic acid and the glycol component is 50 to 85 mol% of ethylene glycol and 15 to 50 mol% of neopentyl glycol, the crystallinity is appropriately lowered, which is suitable for long-fiber nonwoven fabrics. Can develop various crimps.
• the present invention is a long fiber non-woven fabric containing polyethylene terephthalate and a copolymerized polyester, it has a high bulk density and excellent elasticity. Long fiber non-woven fabrics can be provided. Further, it is possible to provide a method for producing the long fiber nonwoven fabric.
• the long-fiber nonwoven fabric according to the first embodiment of the present invention (hereinafter, also referred to as "first embodiment") is It is composed of long fibers of two-component composite spinning containing polyethylene terephthalate and copolymerized polyester.
• the apparent density is 0.1 g / cc or more and 0.25 g / cc or less.
• the elongation recovery rate at the time of 50% elongation is 55% or more.
• the long fibers constituting the long fiber non-woven fabric are composed of two-component composite spinning containing polyethylene terephthalate and a copolymerized polyester.
• the long fiber means a fiber whose length at the time of spinning is endless (endless continuous fiber).
• the length of the long fibers is the same as the length of the long-fiber nonwoven fabric.
• the staple fiber means that the length of the fiber contained in the non-woven fabric is less than the length of the non-woven fabric. That is, the long-fiber non-woven fabric is a non-woven fabric composed of fibers (long fibers) having the same length as the non-woven fabric, and the short-fiber non-woven fabric is a fiber (short fibers) having a length less than the length of the short-fiber non-woven fabric.
• the long fibers contain polyethylene terephthalate, they are excellent in mechanical strength, heat resistance, shape retention, etc. as compared with the case of using a resin such as polyethylene or polypropylene.
• the content ratio of the polyethylene terephthalate in the long fibers is preferably 20% by mass or more and 80% by mass or less, more preferably 30% by mass or more and 70% by mass or less, and further preferably 40% by mass or more and 60% by mass or less. When the content ratio of the polyethylene terephthalate is within the above numerical range, it is excellent in mechanical strength, heat resistance, shape retention and the like.
• the polyethylene terephthalate is a polyester showing an endothermic peak derived from crystallization and / or an endothermic peak derived from crystal melting in the measurement by a differential scanning calorimeter (DSC).
• the amorphous polyester is a resin having no clear crystallization exothermic peak and crystal melting peak as measured by a differential scanning calorimeter (DSC). Further, the amorphous polyester has a glass transition temperature (Tg) of 50 ° C. or higher.
• the glass transition temperature (Tg) is a value obtained from the latent heat transition point at the time of temperature rise at a temperature rise rate of 20 ° C./min by DSC.
• the copolymerized polyester has a lower crystallinity than polyethylene terephthalate (homopolymer). Since the long fiber non-woven fabric (the long fiber) is a two-component composite spinn containing polyethylene terephthalate and a copolymerized polyester, a difference in shrinkage occurs due to a difference in crystallinity when heat-treated, and the roll is rolled. Shrinkage develops.
• copolymerized component of the copolymerized polyester examples include aromatic dicarboxylic acids such as terephthalic acid and 2,6 naphthalindicarboxylic acid; oxalic acid, succinic acid, adipic acid, sebacic acid, undecadicarboxylic acid and the like.
• An aliphatic dicarboxylic acid; an alicyclic dicarboxylic acid such as hexahydroterephthalic acid may be mentioned, and examples of the glycol component include an aliphatic glycol such as ethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol and hexamethylene glycol; Examples thereof include aromatic glycols such as bisphenol, 1,3-bis (2-hydroxyethoxy) benzene, and 1,4- (hydroxyethoxy) benzene. These can be used alone or in combination of two or more.
• the copolymerization component is preferably selected within a range in which the Tg of the copolymerized polyester can be maintained at 50 ° C. or higher.
• copolymerized polyesters the following (a) to (d) are preferable, and (a) is more preferable.
• (A) A copolymerized polyester in which the dicarboxylic acid component is terephthalic acid and the glycol component is 50 to 85 mol% ethylene glycol and 15 to 50 mol% neopentyl glycol.
• (B) A copolymerized polyester in which the dicarboxylic acid component is terephthalic acid and the glycol component is ethylene glycol 50 to 85 mol% and 1,4-cyclohexanedimethanol 15 to 50 mold.
• (C) A copolymerized polyester in which the dicarboxylic acid component is terephthalic acid and the glycol component is 1,4 butanediol 50 to 85 mol% and neopentyl glycol 15 to 50 mol%.
• (D) A copolymerized polyester in which the dicarboxylic acid component is terephthalic acid and the glycol component is 1,4 butanediol 50 to 85 mol% and 1,4-cyclohexanedimethanol 15 to 50 mol%.
• the content of ethylene glycol is more preferably 50 to 85 mol%, further preferably 65 to 75 mol%.
• the content of 1,4 butanediol is more preferably 50 to 85 mol%, further preferably 65 to 75 mol%.
• the content of neopentyl glycol is more preferably 15 to 50 mol%, further preferably 25 to 35 mol%.
• the content of 1,4-cyclohexanedimethanol is more preferably 15 to 50 mol%, further preferably 25 to 35 mol%.
• the copolymerized polyesters (a) to (d) have moderately reduced crystallinity and can develop crimps suitable for long-fiber non-woven fabrics. In addition, properties such as thermal stability are suitable.
• the content ratio of the copolymerized polyester in the long fibers is preferably 20% by mass or more and 80% by mass or less, more preferably 30% by mass or more and 70% by mass or less, and further preferably 40% by mass or more and 60% by mass or less.
• crimping can be suitably exhibited.
• the copolymerization method for producing the copolymerized polyester is not particularly limited, and a conventionally known method can be adopted.
• the long fibers preferably have a core-sheath structure.
• the long fibers have a core-sheath structure, it is possible to appropriately perform crimping at the time of production.
• the core-sheath structure preferably has an eccentric fiber cross section. Specifically, it is preferable that the center of the core component is eccentric by 2% or more, and more preferably 3% or more. That is, the eccentricity measured by the method described in Examples is preferably 2% or more, and more preferably 3% or more.
• the central eccentricity of the core component is preferably larger, but can be, for example, 80% or less, 60% or less, or the like.
• the core-sheath structure is preferably made of copolymerized polyester on the sheath side and polyethylene terephthalate on the core side from the viewpoint of obtaining suitable crimping.
• the long fibers have a side-by-side structure in which a copolymerized polyester and polyethylene terephthalate are bonded together.
• crimping can be suitably performed at the time of production.
• the fiber diameter of the long fiber is preferably 5 to 60 ⁇ m, more preferably 10 ⁇ m to 50 ⁇ m, and further preferably 12 ⁇ m to 40 ⁇ m.
• the fiber diameter is 5 ⁇ m or more, the spinnability by the spunbond method becomes better, and stable production becomes possible. Further, when the fiber diameter is 60 ⁇ m or less, the unevenness of the nonwoven fabric is less likely to deteriorate, and when used as a patch, the exudation of medicinal ingredients can be suppressed.
• the long fiber non-woven fabric is not subjected to mechanical entanglement treatment.
• the mechanical entanglement process include entanglement processing by a needle punch method and a water punch method.
• the mechanical entanglement treatment is not performed, it is preferable in that it can be manufactured at low cost. Further, it is preferable in that it is possible to avoid the risk of needle needle contamination that may occur when the needle punch method is adopted.
• the water punch method uses a large amount of water and requires a huge amount of energy. Therefore, from the viewpoint of environmental conservation and energy saving, it is preferable that the mechanical entanglement treatment is not performed.
• the long fiber nonwoven fabric has an apparent density of 0.1 g / cc or more, preferably 0.11 g / cc or more, and more preferably 0.13 g / cc or more.
• the apparent density is 0.25 g / cc or less.
• the long fiber nonwoven fabric has an elongation recovery rate of 55% or more, preferably 57% or more, and more preferably 60% or more at the time of 50% elongation. Further, the elongation recovery rate at the time of 50% elongation is preferable as it is larger, but it can be, for example, 95% or less, 90% or less, or the like. Since the elongation recovery rate at the time of 50% elongation is 55% or more, it is excellent in elasticity and has a good usability when used as a patch or bandage. For example, when it is attached to a joint such as an elbow, it can follow the movement of the skin at the bent portion and can suppress the occurrence of wrinkles.
• the elongation recovery rate at the time of 50% elongation is 55% or more
• the elongation recovery rate at the time of 50% elongation in the MD (machine direction) direction is 55% or more
• the CD It means that the elongation recovery rate at the time of 50% elongation in the cross direction) direction is 55% or more.
• the 5% elongation load of the long fiber nonwoven fabric is preferably 1.0 N / 25 mm or less, more preferably 0.8 N / 25 mm or less, still more preferably 0.6 N / 25 mm or less.
• the 5% extension load is 1.0 N / 25 mm or less, it is possible to facilitate bending of a joint portion such as an elbow when used as a patch or bandage.
• 5% extension load is 1.0 N / 25 mm or less
• MD machine direction
• CD cross direction
• the 5% extension load in the direction is 1.0 N / 25 mm or less.
• a long-fiber nonwoven fabric containing polyethylene terephthalate and a copolymerized polyester has an apparent density of 0.1 g / cc or more and an elongation recovery rate of 55% or more at 50% elongation. I could't get it.
• a novel manufacturing method that is, after temporarily crimping a long fiber web containing a copolymerized polyester, the long fiber web is boiled at 80 ° C. or higher on the temporarily crimped long fiber web. By performing the crimping process by immersing in, it became possible to achieve an apparent density of 0.1 g / cc or more and an elongation recovery rate at 50% elongation of 55% or more.
• the long fiber non-woven fabric is preferably used as a base cloth for a patch. That is, the long-fiber nonwoven fabric can be suitably used as a base cloth for a patch. Since the long-fiber non-woven fabric has an apparent density of 0.1 g / cc or more, even if it rubs against clothing or the like when used as a patch or bandage, it is not easily rubbed and is not easily rubbed during use. This is because it is possible to prevent the occurrence of. Further, since the elongation recovery rate at the time of 50% elongation is 55% or more, it is excellent in elasticity and has a good usability when used as a patch or bandage.
• the long fiber nonwoven fabric according to the first embodiment (the first embodiment according to the present invention) has been described above.
• the long fiber nonwoven fabric according to the second embodiment of the present invention does not need to have an elongation recovery rate of 55% or more at the time of 50% elongation as in the first embodiment of the present invention. Further, the long fiber nonwoven fabric according to the second embodiment of the present invention may have an apparent density of 0.1 g / cc or more, and has an apparent density of 0, as in the first embodiment of the present invention. It does not have to be 1 g / cc or more and 0.25 g / cc or less.
• the long fiber nonwoven fabric according to the second embodiment of the present invention (hereinafter, also referred to as "second embodiment") is It is composed of long fibers of two-component composite spinning containing polyethylene terephthalate and copolymerized polyester.
• the apparent density is 0.1 g / cc or more,
• the 10% elongation recovery rate is 65% or more.
• the long fiber nonwoven fabric has an apparent density of 0.1 g / cc or more, preferably 0.11 g / cc or more, and more preferably 0.13 g / cc or more.
• the apparent density is preferably larger, but can be, for example, 0.3 g / cc or less, 0.28 g / cc or less, and the like. Since the apparent density is 0.1 g / cc or more, even if it rubs against clothing or the like when used as a patch or bandage, it is less susceptible to friction and may cause creases during use. Can be prevented.
• the long fiber nonwoven fabric has a 10% elongation recovery rate of 65% or more, preferably 70% or more, and more preferably 80% or more.
• the 10% elongation recovery rate is preferable as it is larger, but it can be, for example, 99.5% or less, 99.0% or less, or the like. Since the elongation recovery rate of 10% is 65% or more, it is excellent in elasticity and has a good usability when used as a patch or bandage. For example, when it is attached to a joint such as an elbow, it can follow the movement of the skin at the bent portion and can suppress the occurrence of wrinkles. As a result, it is possible to prevent peeling triggered by the wrinkled portion.
• 10% elongation recovery rate is 65% or more means that the 10% elongation recovery rate in the MD (machine direction) direction is 65% or more and the CD (cross direction) direction. It means that the elongation recovery rate of 10% in the above is 65% or more.
• the long fiber nonwoven fabric according to the second embodiment adopts the same configuration as the long fiber nonwoven fabric according to the first embodiment except for the apparent density and the elongation recovery rate of 10% described above. Can be done. However, as described above, the long fiber nonwoven fabric according to the second embodiment does not need to have an elongation recovery rate of 55% or more at the time of 50% elongation as in the first embodiment. Further, the long fiber nonwoven fabric according to the second embodiment may have an apparent density of 0.1 g / cc or more, and as in the first embodiment, the apparent density may be 0.1 g / cc or more. It does not have to be 25 g / cc or less.
• a long-fiber nonwoven fabric containing polyethylene terephthalate and a copolymerized polyester
• a long-fiber nonwoven fabric having an apparent density of 0.1 g / cc or more and a 10% elongation recovery rate of 65% or more can be obtained.
• a novel manufacturing method that is, a long fiber web containing the copolymerized polyester is temporarily crimped, and then the temporarily crimped long fiber web is crimped to appear. It has become possible to achieve a density of 0.1 g / cc or more and an elongation recovery rate of 65% or more of 10%.
• the long fiber nonwoven fabric according to the second embodiment (second embodiment according to the present invention) has been described above.
• the method for producing a long fiber nonwoven fabric is Step A of discharging molten polyethylene terephthalate and copolymerized polyester from a spinneret, cooling and solidifying the melted polyethylene terephthalate, and then pulling and stretching the melted polyethylene terephthalate with an ejector to form long fibers of a two-component composite spinner.
• Step B in which the long fibers obtained in the step A are collected to form a long fiber web, Step C of temporarily crimping the long fiber web and The long fiber web that has been temporarily crimped is provided with a step D of performing a crimping process.
• molten polyethylene terephthalate and copolymerized polyester are discharged from a spinneret, cooled and solidified, and then pulled and stretched by an ejector to form two components. Form long fibers of composite yarn.
• This step A can be carried out using a conventionally known two-component spunbond spinning machine. That is, the long fibers can be manufactured by the spunbond method, which is a direct-spinning type manufacturing method for directly manufacturing a non-woven fabric from the step of making the fibers ((spinning step)).
• polyethylene terephthalate and the copolymerized polyester those described in the above section of long fiber non-woven fabric can be adopted.
• the step A it is preferable to spin at a spinning speed of 3500 m / min or more. That is, the melted polyethylene terephthalate and the copolymerized polyester are discharged from the spinneret to be cooled and solidified, and then towed and drawn at a spinning speed of 3500 m / min or more by an ejector to form long fibers of a two-component composite spinner. It is preferable to do so.
• the spinning speed By setting the spinning speed to 3500 m / min or more, the degree of orientation crystallinity of the polyester terephthalate is increased.
• the spinning speed is 3500 m / min or more, the orientation of the copolymerized polyester also proceeds.
• the spinning speed is more preferably 3800 m / min or more, still more preferably 4200 m / min or more. Further, the spinning speed is preferably 5500 m / min or less, more preferably 5000 m / min or less, from the viewpoint of spinnability.
• the spinning speed refers to a value obtained by the following formula (1).
• V (10000 ⁇ Q) / T (1)
• V is the spinning speed (m / min)
• T is the fineness of the single fiber (dtex)
• Q is the single-hole discharge amount (g / min).
• the single-hole discharge amount Q is the total of the two components, preferably 0.2 to 5 g / min. By controlling the single-hole discharge amount Q to 0.2 to 5 g / min, it becomes easy to control the spinning speed V within a desired range. It is more preferably 0.3 to 4 g / min and more preferably 0.5 to 3 g / min.
• the fineness T (dtex) of the single fiber is a value expressing the mass of the single fiber of 10,000 meters in grams.
• the eccentric core sheath nozzle is used as the spinneret, and the polyethylene terephthalate as the core component and the copolymerized polyester as the sheath component are discharged from the eccentric core sheath nozzle. It is preferable to include it.
• the eccentric core sheath nozzle a conventionally known one can be adopted.
• a subsequent crimping process step D is performed. In, it becomes possible to appropriately perform the crimping process.
• the step A includes a step A-2 in which a side-by-side nozzle is used as the spinneret and the polyethylene terephthalate and the copolymerized polyester are ejected from the side-by-side nozzle so as to be bonded in a side-by-side manner in the fiber length direction. It is also preferable.
• a side-by-side nozzle a conventionally known one can be adopted.
• step D When a side-by-side nozzle is used as the spinneret and the polyethylene terephthalate and the copolymerized polyester are ejected from the side-by-side nozzle so as to be bonded to each other in a side-by-side manner in the fiber length direction, it is suitable for the subsequent crimping process (step D). Can be crimped.
• step A it is preferable to adopt either the step A-1 or the step A-2.
• spinning is performed from a spinneret having an orifice diameter of 0.1 to 0.5 mm, and the ejector is 1.5 to 4.0 kg / cm 2 . It is preferable to supply dry air at the pressure (jet pressure) of the above and stretch it.
• the orifice diameter of the spinneret is more preferably 0.15 to mm, still more preferably 0.18 to 0.45 mm.
• the jet pressure is more preferably 2.0 to 4.0 kg / cm 2 , and even more preferably 2.5 to 3.8 kg / cm 2 .
• the long fibers obtained in the step A are collected to form a long fiber web (step B).
• the long fibers may be collected while being opened on the lower conveyor to form a long fiber web.
• the long fiber web obtained in the step B is temporarily crimped (step C).
• the temporary crimping is performed within a temperature range in which the long fiber web does not shrink. As a result, it becomes possible to carry out suitably.
• the temperature at the time of temporary crimping is preferably 50 ° C to 80 ° C, more preferably 55 ° C to 75 ° C, and even more preferably 60 ° C to 70 ° C.
• a flat roll can be used for the temporary crimping.
• the linear pressure at the time of temporary crimping is preferably 1 to 10 kg / cm, more preferably 3 to 7 kg / cm. When the linear pressure is within the numerical range, the process can be passed without breaking due to transportation.
• Step D the temporarily crimped long fiber web is crimped (step D).
• the crimped long fibers become crimped yarns.
• the step D is preferably a step of immersing the long fiber web in boiling water at 80 ° C. or higher. Further, it is also preferable that the step D is a step of subjecting the long fiber web to crimping while gradually reducing the speed ratio by using two or more heating rollers whose temperature modulation and speed ratio can be changed. ..
• step D is a step of immersing the long fiber web in boiling water of 80 ° C. or higher.
• step D is a step of immersing the long fiber web in boiling water of 80 ° C. or higher
• the temperature of the boiling water is not particularly limited as long as it is 80 ° C. or higher, but 85. °C or higher is preferable, and 90 ° C or higher is more preferable.
• the temperature of the boiling water is preferably 99 ° C. or lower, more preferably 97 ° C. or lower, from the viewpoint of suppressing the generation of wrinkles due to rapid shrinkage. Since the temperature of the boiling water is 80 ° C. or higher, the long fibers can be suitably crimped.
• the immersion time in the boiling water is not particularly limited, but is preferably 2 seconds or longer, more preferably 3 seconds or longer.
• the immersion time in the boiling water is 5 seconds or more, the crimping process can be sufficiently performed.
• the immersion time in the boiling water can be, for example, 20 seconds or less, 10 seconds or less, or the like.
• the water used for boiling water is not particularly limited, but a liquid that imparts hydrophilicity may be mixed in order to improve the impregnation rate, and an appropriate amount of a neutral detergent or the like can be added in consideration of the environment.
• it is preferable that no lateral tension is applied while the long fiber web is immersed in the boiling water. By not applying tension in the lateral direction, the bulk density can be further increased.
• the method for producing a long fiber nonwoven fabric according to the present embodiment includes a step E of laterally stretching the long fiber web after the step D.
• the long fiber web is stretched laterally to obtain a long fiber nonwoven fabric having a thickness corresponding to the draw ratio. That is, the thickness of the obtained long fiber nonwoven fabric can be adjusted by the stretching ratio in the lateral direction.
• the stretching method in the step E stretching using a conventionally known tenter is preferable.
• the lateral stretching ratio in the step E is preferably 2% or more, more preferably 5% or more.
• the draw ratio is preferably 20% or less, more preferably 15% or less.
• the stretching ratio in the lateral direction means the stretching ratio with respect to the width before stretching. That is, the width after stretching is the width obtained by adding the stretching ratio to the width 100% before stretching. For example, when the stretching ratio is 10%, the width after stretching is 110% with respect to the width before stretching.
• the method for producing a long fiber nonwoven fabric according to the present embodiment includes a step F in which the long fiber web is subjected to calendar processing after the step E.
• the thickness of the obtained long fiber nonwoven fabric can be more preferably adjusted by the distance between the rolls of the calendar processing.
• the thickness can be made uniform.
• the distance between the rolls for calendar processing in the step F is preferably 0.1 mm or more, more preferably 0.2 mm or more.
• the distance between the rolls of the calendar processing in the step F is 0.1 mm or more, it is possible to suppress the deterioration of the expansion / contraction function and the improvement of the initial tensile stress due to the excessive pressure bonding of the fibers.
• the distance between the rolls is preferably 0.7 mm or less, more preferably 0.5 mm or less, from the viewpoint of preferably adjusting the thickness of the obtained long fiber nonwoven fabric.
• the calendar temperature (roll temperature) in the step F is preferably 40 ° C. or higher, more preferably 50 ° C. or higher. By setting the calendar temperature to 40 ° C. or higher, the thickness of the fibrous nonwoven fabric can be adjusted more preferably. In addition, the thickness can be made more uniform.
• the method for producing a long fiber nonwoven fabric according to the present embodiment preferably includes a step G for drying the long fiber web after the step F.
• the drying temperature in the step G is preferably 80 ° C. or higher, more preferably 90 ° C. or higher, from the viewpoint of removing water.
• the drying temperature is preferably 150 ° C. or lower, more preferably 130 ° C. or lower, from the viewpoint of suppressing fusion between fibers.
• the drying time in the step G is preferably 10 seconds or longer, more preferably 20 seconds or longer, from the viewpoint of removing water. Further, the drying temperature is preferably 100 seconds or less, more preferably 60 seconds or less, from the viewpoint of suppressing fusion between fibers.
• step D is a step of immersing the long fiber web in boiling water at 80 ° C. or higher has been described above.
• step D is a step of subjecting the long fiber web to crimping while gradually reducing the speed ratio by using two or more heating rollers whose temperature modulation and speed ratio can be changed. explain.
• the heating roller When the step D is a step of subjecting the long fiber web to crimping while gradually reducing the speed ratio by using two or more heating rollers whose temperature modulation and speed ratio can be changed, the heating roller. Will be set to a temperature at which crimping occurs or higher, and shrinkage will also occur. Since the speed ratio of transport is reduced by the amount of shrinkage, it is possible to suppress the generation of wrinkles due to sudden shrinkage.
• the number of the heating rollers is preferably two or more, and preferably four or more. By using a plurality of heating rollers and gradually reducing the speed ratio, the area of the long fiber web can be reduced according to the amount of shrinkage, and the generation of wrinkles and the like can be suppressed.
• the upper limit of the number of the heating rollers is not particularly limited, but from the viewpoint of equipment cost, for example, 12 or less and 10 or less may be used.
• the heating temperature (the temperature of the heating roller) during the crimping process is preferably 60 to 150 ° C, more preferably 70 to 140 ° C, and even more preferably 80 to 130 ° C. When the heating temperature is within the numerical range, crimping can be suitably exhibited.
• the transport speed may be slowed down according to the shrinkage amount of the long fiber web at the time of crimping.
• Nip may be performed as needed during the crimping process.
• the nip is preferably performed during crimping with a heating roller having the highest temperature. Adhesion can be improved by performing niping during crimping with the hottest heating roller.
• step D the crimping is performed in a state of being in contact with the heating roller. As a result, it can be finished smoothly, having a high apparent density, and being thin.
• step D is a step of subjecting the long fiber web to crimping while gradually reducing the speed ratio by using two or more heating rollers whose temperature modulation and speed ratio can be changed will be described. did.
• the present invention (the first invention and the second invention) will be described in detail with reference to Examples, but the present invention (the first invention and the second invention) is the present invention. As long as it does not exceed the gist, it is not limited to the following examples.
• the following Examples 1 to 8 are examples related to the first invention, and Examples 9 to 14 are examples related to the second invention.
• Glass-transition temperature According to JIS K7122 (1987), the glass transition temperature of the copolymerized polyester was determined at a heating rate of 20 ° C./min.
• a density gradient liquid prepared from calcium nitrate tetrahydrate was prepared in a density gradient tube, and the fibers after jet stretching were put into the density gradient tube using a specific density float range in the range of 1.29 to 1.5 g / cm 3 . After stabilizing for 4 hours or more, the memory at the floating position was read, and the specific density was obtained from the calibration line of the float.
• Example 1 Using a side-by-side nozzle in a two-component spunbond spinning facility, polyethylene terephthalate (inherent viscosity (iv value): 0.63) and copolymerized polyester (dicarboxylic acid component is terephthalic acid, glycol component is ethylene glycol 70 mol% and neo Copolymer with 30 mol% pentyl glycol, intrinsic viscosity (iv value): 0.75, Tg: 75 ° C.) spun at a mass ratio of 5.5 (polyethylene terephthalate): 4.5 (copolymerized polyester). I put it out.
• Spinning was performed from a spinneret having an orifice diameter of 0.36 mm at a single hole discharge rate of 1.0 g / min. After that, dry air is further supplied to the ejector at a pressure (jet pressure) of 3.5 kg / cm 2 , stretched in one step, and the fibers are collected while being opened on the lower conveyor to collect the long fiber web.
• the obtained long fiber web was temporarily crimped.
• the conditions for temporary crimping were a temporary crimping roll temperature of 60 ° C. and a linear pressure of 5 kg / cm.
• the fiber diameter of the long fiber web obtained as described above was 14.5 ⁇ m, the spinning speed was 4500 m / min, and the basis weight was 25 g / m 2 .
• the obtained long fiber web was immersed in boiling water.
• the temperature of the boiling water and the immersion time in the boiling water were as shown in Table 1.
• no tension was applied in the lateral direction.
• the calendar temperature (roll temperature) and the distance between rolls for calendar processing (calendar clearance) are as shown in Table 1.
• the long fiber web was subjected to calendar processing, the long fiber web was dried.
• the drying temperature was as shown in Table 1. From the above, the nonwoven fabric according to Example 1 was obtained.
• Example 2 A copolymer using a core sheath nozzle with an eccentricity of 0.1 mm and a copolymer polyester (dicarboxylic acid component is terephthalic acid, glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol) on the sheath side. , Intrinsic viscosity (iv value): 0.75, Tg: 75 ° C.), and the transverse stretching ratio was changed to 8% to obtain a non-woven fabric under the same conditions as in Example 1.
• Example 3 Polyethylene terephthalate and copolymerized polyester (copolymer in which the dicarboxylic acid component is terephthalic acid and the glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol, intrinsic viscosity (iv value): 0.75, Tg :.
• a non-woven fabric was obtained under the same conditions as in Example 2 except that the ratio of (75 ° C.) was 6.5: 3.5 and the lateral stretching ratio was changed to 5%.
• Example 4 As the copolymerized polyester on the sheath side, a copolymer having a dicarboxylic acid component of terephthalic acid and a glycol component of 85 mol% ethylene glycol and 15 mol% neopentyl glycol (inherent viscosity (iv value): 0.75, Tg). : 75 ° C.) was used, and a non-woven fabric was obtained under the same conditions as in Example 2 except that the lateral stretching ratio was changed to 3%.
• a copolymer having a dicarboxylic acid component of terephthalic acid and a glycol component of 85 mol% ethylene glycol and 15 mol% neopentyl glycol inherent viscosity (iv value): 0.75, Tg). : 75 ° C.
• Comparative Example 1 A non-woven fabric was obtained under the same conditions as in Example 3 except that the temperature of boiling water was changed as shown in Table 1 and no transverse stretching was performed. The reason why the transverse stretching was not performed is that in Comparative Example 1, the basis weight before the transverse stretching was small. That is, in each Example and Comparative Example, the obtained nonwoven fabric is laterally stretched in order to have the same basis weight (about 100 g / m 2 ), but in Comparative Example 1, the basis weight before the transverse stretching is It was not performed because the amount of basis weight was further reduced by lateral stretching.
• Example 3 A non-woven fabric was obtained under the same conditions as in Example 3 except that the calendar clearance was changed as shown in Table 1.
• Comparative Example 4 As the copolymerized polyester, a copolymer having a dicarboxylic acid component of terephthalic acid and a glycol component of 95 mol% ethylene glycol and 5 mol% neopentyl glycol (inherent viscosity (iv value): 0.75, Tg: 75 ° C. ) was used, and a non-woven fabric was obtained under the same conditions as in Example 3 except that the transverse stretching was not performed. The reason why the transverse stretching was not performed is that in Comparative Example 4, the basis weight before the transverse stretching was small.
• the obtained nonwoven fabric is laterally stretched in order to have the same basis weight (about 100 g / m 2 ), but in Comparative Example 4, the basis weight before the transverse stretching is It was not performed because the amount of basis weight was further reduced by lateral stretching.
• the elongation recovery rate and the peeling property evaluation grade were as shown in Table 1.
• Example 5 Using a side-by-side nozzle in a two-component spunbond spinning facility, polyethylene terephthalate (inherent viscosity (iv value): 0.63) and copolymerized polyester (dicarboxylic acid component is terephthalic acid, glycol component is ethylene glycol 70 mol% and neo Copolymer with 30 mol% pentyl glycol, intrinsic viscosity (iv value): 0.75, Tg: 75 ° C.) spun at a mass ratio of 5.5 (polyethylene terephthalate): 4.5 (copolymerized polyester). I put it out.
• polyethylene terephthalate inherent viscosity (iv value): 0.63
• copolymerized polyester dicarboxylic acid component is terephthalic acid
• glycol component is ethylene glycol 70 mol% and neo Copolymer with 30 mol% pentyl glycol, intrinsic viscosity (iv value
• Spinning was performed from a spinneret having an orifice diameter of 0.36 mm at a single hole discharge rate of 1.0 g / min. After that, dry air is further supplied to the ejector at a pressure (jet pressure) of 3.5 kg / cm 2 , stretched in one step, and the fibers are collected while being opened on the lower conveyor to collect the long fiber web.
• the obtained long fiber web was temporarily crimped.
• the conditions for temporary crimping were a temporary crimping roll temperature of 60 ° C. and a linear pressure of 5 kg / cm.
• the fiber diameter of the long fiber web obtained as described above was 14.5 ⁇ m, the spinning speed was 4500 m / min, and the basis weight was 25 g / m 2 .
• the obtained long fiber web was crimped while being conveyed by six heating rolls. Specifically, it was assumed that the temperature of each heating roll and the speed ratio of each heating roll are shown in Table 2.
• the speed ratio means the speed of being carried out from the outlet of each roll with respect to the speed of being carried from the inlet of the first roll to the first roll.
• pressurization was performed with a rubber nip roll. From the above, the nonwoven fabric according to Example 5 was obtained.
• Example 6 A copolymer using a core sheath nozzle with an eccentricity of 0.1 mm and a copolymer polyester (dicarboxylic acid component is terephthalic acid, glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol) on the sheath side. , Intrinsic viscosity (iv value): 0.75, Tg: 75 ° C.) was arranged, and a non-woven fabric was obtained under the same conditions as in Example 5.
• Example 7 Polyethylene terephthalate and copolymerized polyester (copolymer in which the dicarboxylic acid component is terephthalic acid and the glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol, intrinsic viscosity (iv value): 0.75, Tg :.
• a non-woven fabric was obtained under the same conditions as in Example 5 except that the ratio of (75 ° C.) was 6.5: 3.5.
• Example 8 Polyethylene terephthalate and copolymerized polyester (copolymer in which the dicarboxylic acid component is terephthalic acid and the glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol, intrinsic viscosity (iv value): 0.75, Tg :.
• a non-woven fabric was obtained under the same conditions as in Example 6 except that the ratio of (75 ° C.) was 6.5: 3.5.
• the elongation recovery rate and the peeling property evaluation grade were as shown in Table 2.
• Example 9 Using a side-by-side nozzle in a two-component spunbond spinning facility, polyethylene terephthalate (inherent viscosity (iv value): 0.63) and copolymerized polyester (dicarboxylic acid component is terephthalic acid, glycol component is ethylene glycol 70 mol% and neo Copolymer with 30 mol% pentyl glycol, intrinsic viscosity (iv value): 0.75, Tg: 75 ° C.) spun at a mass ratio of 5.5 (polyethylene terephthalate): 4.5 (copolymerized polyester). I put it out.
• Spinning was performed from a spinneret having an orifice diameter of 0.36 mm at a single hole discharge rate of 1.0 g / min. After that, dry air is further supplied to the ejector at a pressure (jet pressure) of 3.5 kg / cm 2 , stretched in one step, and the fibers are collected while being opened on the lower conveyor to collect the long fiber web.
• the obtained long fiber web was temporarily crimped.
• the conditions for temporary crimping were a temporary crimping roll temperature of 60 ° C. and a linear pressure of 5 kg / cm.
• the fiber diameter of the long fiber web obtained as described above was 14.5 ⁇ m, the spinning speed was 4500 m / min, and the basis weight was 25 g / m 2 .
• the obtained long fiber web was crimped while being conveyed by six heating rolls. Specifically, it was assumed that the temperature of each heating roll and the speed ratio of each heating roll are shown in Table 1.
• the speed ratio means the speed of being carried out from the outlet of each roll with respect to the speed of being carried from the inlet of the first roll to the first roll.
• pressurization was performed with a rubber nip roll.
• the obtained non-woven fabric had a basis weight of 100 g / m 2 , a thickness of 0.8 mm, an apparent density of 0.13 g / cc, a 10% elongation recovery rate of 84% in the MD direction, and a 10% elongation recovery rate of 87% in the CD direction.
• the peelability evaluation grade was 5 grades.
• Example 10 A copolymer using a core sheath nozzle with an eccentricity of 0.1 mm and a copolymer polyester (dicarboxylic acid component is terephthalic acid, glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol) on the sheath side. , Intrinsic viscosity (iv value): 0.75, Tg: 75 ° C.) was arranged, and a non-woven fabric was obtained under the same conditions as in Example 9.
• the obtained non-woven fabric had a basis weight of 98 g / m 2 , a thickness of 0.75 mm, an apparent density of 0.13 g / cc, a 10% elongation recovery rate of 78% in the MD direction, and a 10% elongation recovery rate of 83% in the CD direction.
• the peelability evaluation grade was 4 grades.
• Example 11 Polyethylene terephthalate and copolymerized polyester (copolymer in which the dicarboxylic acid component is terephthalic acid and the glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol, intrinsic viscosity (iv value): 0.75, Tg :.
• a non-woven fabric was obtained under the same conditions as in Example 9 except that the ratio of (75 ° C.) was 6.5: 3.5.
• the obtained non-woven fabric had a basis weight of 95 g / m 2 , a thickness of 0.9 mm, an apparent density of 0.11 g / cc, a 10% elongation recovery rate of 71% in the MD direction, and a 10% elongation recovery rate of 72% in the CD direction.
• the peelability evaluation grade was 3 grades.
• Example 12 Polyethylene terephthalate and copolymerized polyester (copolymer in which the dicarboxylic acid component is terephthalic acid and the glycol component is 70 mol% ethylene glycol and 30 mol% neopentyl glycol, intrinsic viscosity (iv value): 0.75, Tg :.
• a non-woven fabric was obtained under the same conditions as in Example 10 except that the ratio of (75 ° C.) was 6.5: 3.5.
• the obtained non-woven fabric had a basis weight of 97 g / m 2 , a thickness of 0.92 mm, an apparent density of 0.11 g / cc, a 10% elongation recovery rate of 67% in the MD direction, and a 10% elongation recovery rate of 70% in the CD direction.
• the peelability evaluation grade was 3 grades.
• Example 13 As the copolymerized polyester on the sheath side, a copolymer having a dicarboxylic acid component of terephthalic acid and a glycol component of 85 mol% ethylene glycol and 15 mol% neopentyl glycol (inherent viscosity (iv value): 0.75, Tg). : 75 ° C.) was used, and a non-woven fabric was obtained under the same conditions as in Example 10.
• a copolymer having a dicarboxylic acid component of terephthalic acid and a glycol component of 85 mol% ethylene glycol and 15 mol% neopentyl glycol inherent viscosity (iv value): 0.75, Tg). : 75 ° C.
• the obtained non-woven fabric had a basis weight of 97 g / m 2 , a thickness of 0.85 mm, an apparent density of 0.11 g / cc, a 10% elongation recovery rate of 65% in the MD direction, and a 10% elongation recovery rate of 67% in the CD direction.
• the peelability evaluation grade was 3 grades.
• Example 14 As the copolymerized polyester, a copolymer having a dicarboxylic acid component of terephthalic acid and a glycol component of 50 mol% ethylene glycol and 50 mol% neopentyl glycol (inherent viscosity (iv value): 0.75, Tg: 75 ° C. ) was used, and a non-woven fabric was obtained under the same conditions as in Example 9.
• the obtained non-woven fabric had 110 g / m 2 , a thickness of 0.8 mm, an apparent density of 0.14 g / cc, a 10% elongation recovery rate of 86% in the MD direction, a 10% elongation recovery rate of 88% in the CD direction, and peelability.
• the evaluation grade was 5 grades.
• Example 5 A spunbonded nonwoven fabric was obtained under the same conditions as in Example 9 except that the crimping was performed by hot air through at 130 ° C. instead of the crimping using a heating roll.
• the obtained non-woven fabric has 101 g / m 2 , thickness 1.3 mm, apparent density 0.08 g / cc, 10% elongation recovery rate 88% in the MD direction, 10% elongation recovery rate 89% in the CD direction, and peelability.
• the evaluation grade was 1 grade.

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