Abstract: A nonwoven fabric made of filaments, which comprises filaments formed from a fiber-forming thermoplastic polymer and satisfies all of the following conditions (A) to (D). (A) The fiber bundles are present in a range of 5-70 per centimeter in any cross-section parallel to the direction of thickness of the nonwoven fabric. (B) The total area occupied by the fiber bundles is in a range of 5-70% of the cross-sectional area of any cross-section perpendicular to the direction of thickness of the nonwoven fabric. (C) The apparent density is 0.10-0.50 g/cm3. (D) The cut ends of the fibers on the nonwoven fabric surface are present in a range of 5-100 per mm2 of surface area.

Abstract: Polyester-based heat-bonding conjugate staple fibers capable of giving a high grade fiber structure which has good dimensional stability and is hardly deformed, even when used under a high temperature atmosphere, comprises an amorphous polyester having a glass transition point of 50 to 100° C. and not having a crystal-melting point as a heat-bonding component and a polyalkylene terephthalate having a melting point of not less than 220° C. as a fiber-forming component, have characteristics comprising the number of crimps of 3 to 40 crimps/25 mm, a crimp percent of 3 to 40% and a web area shrinkage percent of not more than 20%. Herein, the web area shrinkage percent (%) is represented by the expression: (A0−A1)/A0×100, wherein a card web nonwoven fabric comprising 100% of the heat-bonding conjugate staple fibers and having an area of A0 and a basis weight of 30 g/m2 is left in a hot air dryer maintained at 150° C. for two minutes, and the area of the left nonwoven fabric is A1.

Abstract: Crimped polyester fibers which comprise a polytrimethylene terephthalate-based polyester and have three-dimensional crimps with a number of crimps of 9 to 30 peaks/25 mm and a crimp ratio of 20 to 50% and further a crimp modulus of elasticity of 80% or above. A fiber structure wherein the weight ratio of staple fibers of the above crimped polyester fibers to heat-bonding conjugated staple fibers is 30:70 to 95:5 and heat-bonded spots are formed at least partially in contact points of both the staple fibers and/or contact points of the mutual heat-bonding conjugated staple fibers.

Abstract: A nonwoven fabric made of filaments, which comprises filaments formed from a fiber-forming thermoplastic polymer and satisfies all of the following conditions (A) to (D).

Abstract: A hydrophilic fiber which is a fiber having the ratio of the perimeter occupied by a polyolefin to the whole perimeter of the fiber cross section of 30% or above, the hydrophilic property of the fiber of 30 seconds or below and the retention of the hydrophilic property of the fiber with the lapse of time of 90% or above before and after treatment at a temperature of 40° C. and a relative humidity of 80% with the lapse of time of 30 days, with the proviso that the hydrophilic property of the fiber is measured by the following method: The interior of a pipe made of polymethyl methacrylate and having an inside diameter of 25 mm, an outside diameter of 30 mm and a pipe length of 25 mm is stuffed with 5.0 grams of fibers so as not to protrude the fibers. Said pipe is floated on 1,000 cc of softened water at 30° C. in a container having a caliber of 105 mm &phgr; and filled with the water, allowed to stand and once sunk to the bottom.

Abstract: Hollow polyester fibers having a thickness of 0.11 to 8.89 d tex (0.1 to 8.0 denier), a hollow volume (a cross-sectional area ratio of hollow to fiber) of 40 to 85%, and a crystallization degree of 20% or more and crystal size in (0 1 0) plane of 4 nm or more of polyester, has a high resistance to compression and a high recovery from compression and are useful for producing woven and knitted fabric having a high durability, pile sheet materials having high resistance to and recovery from pile prostration, and nonwoven fabrics and artificial leather materials having a high resistance and recovery from compression.

Abstract: Elastic polyester fibers having a high anti-cohesive property (separability) include (A) a polyester elastomer and (B) 0.2 to 10%, based on the weight of the elastomer, of an anti-cohesive agent including (a) at least one alkali metal salt of organic sulfonic acid of the formula: R.sup.1 --S0.sub.3 M, wherein R.sup.1 =C.sub.5-25 hydrocarbon group, M=alkali metal, and (b) at least one compound of the formulae (2)-(6): R.sup.2 --X.sub.p --CH.sub.2 CH.sub.2 OH (2), R.sup.3 --COO--CH.sub.2 CH(OH)CH.sub.2 OH (3), R.sup.4 --COO--(CH.sub.2 CH.sub.2 O).sub.m --H (4), R.sup.5 --O--(CH.sub.2 CH.sub.2 O).sub.n H (5) and R.sup.6 --CONHCH.sub.2 CH.sub.2 NHCO--R.sup.7 (6), wherein R.sup.2 -R.sup.7 =C.sub.5-25 hydrocarbon group, X=--CONY or ##STR1## group, p=0 or 1, m, n=5 to 50.

Abstract: Highly elastic heat-bonding conjugated fibers capable of providing a fiber structure having excellent recovery from compression and compression durability and a high level of air permeability comprise a thermoplastic elastomer component and a crystalline nonelastic polyester component having a higher melting point than that of the elastomer as constituent components thereof and can be provided by arranging the elastomer component in a crescent shape in the circular fiber cross section of the bonding conjugated fibers and specifying the geometrical dimensions (a shape occupied by each of the two components constituting the heat-bonding conjugated fibers) therein.

Abstract: Highly elastic heat-bonding conjugated fibers capable of providing a fiber structure having excellent recovery form compression and compression durability and a high level of air permeability comprise a thermoplastic elastomer component and a crystalline nonelastic polyester component having a higher melting point than that of the elastomer as constituent components thereof and can be provided by arranging the elastomer component in a crescent shape in the circular fiber cross section of the bonding conjugated fibers and specifying the geometrical dimensions (a shape occupied by each of the two components constituting the heat-bonding conjugated fibers) therein.

Abstract: An acaricide fiber material including a number of individual fibers and an acaricide component fixed to the individual fibers and consisting essentially of a solution comprising at least one member selected from the group consisting of N-(fluorodichloromethylthio)-phthalimide, N-methyl-N,-phenyl-(N'-fluorodichloro-methylthio)-sulfamide, 4-chlorophenyl-3'-iodoproparagyl formal, and 2,4,4'-trichloro-2'-hydroxydiphenyl-ether, dissolved in a carrier consisting of at least one type of phthalic acid ester, prepared by suspending the acaricide solution in an aqueous medium, applying the acaricide aqueous suspension to a fiber material comprising the individual fibers, and drying the aqueous suspension layers on the individual fibers to fix the acaricide component to the individual fibers.

Abstract: A fragrant non-hollow core-in-sheath type composite staple fiber having a length of from 3 mm to 150 mm and useful for gradual fragrance-emitting textile materials comprises (1) a non-hollow core portion comprising (i) 0.1 to 5% of an essential oil and (ii) the balance consisting of an olefin polymer composition; and (2) a sheath portion covering the core portion and comprising a polyester resin, the olefin polymer composition (ii) comprising: (A) 50 to 98% by weight of an olefin polymer which is a polymerization product of at least one member selected from ethylene and .alpha.

Abstract: A-type fibers having a fiber thickness of less than 1 denier is produced by the steps of: obtaining undrawn fibers by melt-spinning a co-polyester having an intrinsic viscosity of from 0.35 to 0.50, and having repeating units composed mainly of ethylneneterephthalate that contains from 0.5 mol % to 7.0 mol % of 5-sodiumsulfoisophthalic acid and from 0.5 mol % to 10 mol % of isophthalic acid; and flow-drawing the undrawn yarn at a draw ratio of more than 5 times. The A-type polyester fibers are further neck-drawn at a draw ratio of more than 1.05 times to be B-type fibers, and the B-type fibers are subjected to a restricted contraction treatment to be C-type fibers. Staple fibers having a length of less than 15 mm obtained from at least one of the A, B and C-type fibers are blended in a material for the production of a wet type non-woven fabric at a ratio of more than 10 weight %, if necessary, together with other fibers such as a regular type polyester fiber, wood pulp or a glass fiber.

Abstract: The present invention relates to a polyester and cotton blended yarn capable of obtaining a polyester and cotton blended fabric having a superior bulkiness and a soft touch, and a polyester staple fiber stock which is useful to obtain the blended yarn as a yarn having superior properties with regard to neps and a yarn uneveness. To obtain the above-mentioned polyester cotton blended yarn, a coarse denier staple fiber having a predetermined range of fineness and a fine denier staple fiber having a predetermined range of fineness are used, and a suitable number of staple fibers constituting the blended yarn and fiber lengths of the staple fibers are defined in the present invention.

Abstract: Disclosed is a flameproofing synthetic fiber comprising a halogenated cycloalkane and at least one member selected from phosphorus compounds represented by the following general formulae (I) through (IV): ##STR1## According to the present invention, the flameproofing synthetic fiber which is excellent in flameproofing property and feeling and significantly improved in spinning property and corrosion protective property can be provided. Furthermore, the foaming during operation and the passing processability through a stuffing crimper are also extremely improved.

Abstract: A papermaking polyester fiber having a denier number within the range of from about 0.1 to about 3.0 and a length within the range of from about 5 mm to about 25 mm and providing a packing factor of more than about 40 and a quantity of residual fibers of less than about 1000 mg on a flat screen plate when measured by a flat screen method.

Abstract: A synthetic fur closely resembling a natural fur comprises relatively long and thick guard hair-like raised synthetic fibers, each having a transverse cross-section wherein at least one constricted part is formed, and underfur-like raised synthetic fibers, each having a rate of dissolution in a solvent or of hydrolysis with a hydrolyzing agent higher than that of said guard hair-like raised fibers, and a length and fineness less than those of said guard hair-like raised fibers. The synthetic fur is prepared by applying a viscous treating liquid containing a solvent or hydrolyzing agent to a raised surface of a fabric comprising relatively thick raised synthetic fibers, each having a transverse cross-section wherein at least one constricted part is formed, and relatively fine raised synthetic fibers, each having a rate of dissolution in the solvent or of hydrolysis with the hydrolyzing agent higher than that of said relatively thick raised fibers.

Abstract: A synthetic fur closely resembling a natural fur comprises relatively long and thick guard hair-like raised synthetic fibers, each having a transverse cross-section wherein at least one constricted part is formed, and underfur-like raised synthetic fibers, each having a rate of dissolution in a solvent or of hydrolysis with a hydrolyzing agent higher than that of said guard hair-like raised fibers, and a length and fineness less than those of said guard hair-like raised fibers. The synthetic fur is prepared by applying a viscous treating liquid containing a solvent or hydrolyzing agent to a raised surface of a fabric comprising relatively thick raised synthetic fibers, each having a transverse cross-section wherein at least one constricted part is formed, and relatively fine raised synthetic fibers, each having a rate of dissolution in the solvent or of hydrolysis with the hydrolyzing agent higher than that of said relatively thick raised fibers.

Abstract: A treating agent for filling synthetic fibers, said treating agent comprising (a) 1 part by weight of a specific substituted aminosilane of the formula ##STR1## and (b) 1 to 20 parts by weight of a specific epoxysiloxane containing at least one structural unit of the formula ##STR2## and at least two structural units of the formula ##STR3## A method for treating synthetic fibers with the above treating agent. Synthetic fibers treated with the above treating agent suitable for use as fillings for quilts.

Abstract: A treating agent for filling synthetic fibers, said treating agent comprising (a) 1 part by weight of a specific substituted aminosilane of the formula ##EQU1## and (b) 1 to 20 parts by weight of a specific epoxysiloxane containing at least one structural unit of the formula ##EQU2## and at least two structural units of the formula ##EQU3## A method for treating synthetic fibers with the above treating agent. Synthetic fibers treated with the above treating agent suitable for use as fillings for quilts.