WO1994024347A1 - Fibre a structure reticulee, non-tisse constitue de telles fibres, et procede de production de la fibre et du non-tisse - Google Patents

Fibre a structure reticulee, non-tisse constitue de telles fibres, et procede de production de la fibre et du non-tisse Download PDF

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Publication number
WO1994024347A1
WO1994024347A1 PCT/JP1994/000581 JP9400581W WO9424347A1 WO 1994024347 A1 WO1994024347 A1 WO 1994024347A1 JP 9400581 W JP9400581 W JP 9400581W WO 9424347 A1 WO9424347 A1 WO 9424347A1
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WO
WIPO (PCT)
Prior art keywords
polymer
nonwoven fabric
fiber
fibers
ester
Prior art date
Application number
PCT/JP1994/000581
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English (en)
Japanese (ja)
Inventor
Fumio Matsuoka
Shigemitsu Murase
Koichi Nagaoka
Hiroshi Nishimura
Original Assignee
Unitika Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unitika Ltd filed Critical Unitika Ltd
Priority to JP52296894A priority Critical patent/JP3317703B2/ja
Priority to DE69431745T priority patent/DE69431745T2/de
Priority to EP94912067A priority patent/EP0645480B1/fr
Publication of WO1994024347A1 publication Critical patent/WO1994024347A1/fr
Priority to US08/791,344 priority patent/US5786284A/en

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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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43838—Ultrafine fibres, e.g. microfibres
    • 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
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/724—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged forming webs during fibre formation, e.g. flash-spinning
    • 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
    • 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
    • D04H3/007—Addition polymers
    • 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

Definitions

  • the present invention relates to a fiber having an extremely fine network structure constituted of a mixture of mutually incompatible polymers, a nonwoven fabric made of this fiber and having a dense structure, and methods for producing the same.
  • the melt blown method involves thinning at the stage of the molten polymer, so that the stretch orientation and crystallization are small, and the obtained fibers are extremely small. It has the disadvantage of being extremely weak.
  • a so-called flash spinning method has been proposed as a method for obtaining ultrafine fibers from a polymer solution.
  • a solution of a polymer with a low boiling point solvent is extruded from a spinning nozzle to instantaneously evaporate the solvent, as described in Ameriki Patent No. 3,081,519. Things.
  • the fibers obtained in this formulation are composed of a single polymer component in any material, and therefore have the inherent disadvantages of polymers, which limit the development of product applications. There is a problem of giving. The same applies to the technology disclosed in Japanese Patent Application Publication No. 411 6 2 15 and Japanese Patent Application Publication No. 197 256 56.
  • the orefin-based polymer is excellent in mass, but has a low modulus, has no feeling of use or wearing, and has a unique slimy feeling.
  • Ester polymers are inherently suitable for high-strength textiles and have a high modulus, but have not been put to practical use because high-strength textiles have not been obtained by flash spinning.
  • the present invention solves the above-mentioned problems, and in particular, comprises an extra-fine network-structured fiber, which has the advantages of the offset polymer and the ester polymer, offsetting the disadvantages of the polymer and the disadvantages of the ester polymer.
  • An object of the present invention is to provide a nonwoven fabric and a method for producing the same.
  • the present inventors have made intensive studies to solve the above problems, and as a result, have reached the present invention.
  • the fiber having a network structure based on the present invention is composed of a mixture composed of at least an olefin polymer and an ester polymer which are incompatible with each other, and has a network structure.
  • the method for producing a fiber having a network structure based on the present invention comprises dissolving a mixed polymer of an olefin-based polymer and an ester-based polymer which are incompatible with each other at a high temperature and a high pressure in a solvent to form a bath. The polymer is then spun from a nozzle in a state where the polymer and the solvent are phase-separated.
  • the textile of the present invention is composed of an olefin-based polymer and an ester-based polymer, and has a network structure composed of an extremely high-precision extra-fine fibril arrowhead fiber, which has never been seen before. Modulus is high in strength.
  • the nonwoven fabric having a dense structure includes a fiber having a network structure, and the fibers have a weight ratio of a mixture of an olefin-based polymer and an ester-based polymer which are not compatible with each other.
  • the mixture in the range of 5Z95 to 95/5 is mixed, and further, the weave of the network structure is bonded.
  • the fibers of the network are bonded together or partially.
  • the method for producing a nonwoven fabric having a dense structure based on the present invention is characterized in that the mixing ratio of an olefin polymer and an ester polymer which are not compatible with each other is 5Z95 to 95Z by weight ratio.
  • a fiber having a network structure in which the mixture in the range of 5 is mixed is made, and this fiber is used as a web, and then, the rolls are thermocompression-bonded using a group of rolls. It consists of gluing over.
  • Another manufacturing method of the nonwoven fabric based on the present invention is such that the mixing ratio of the olefin polymer and the ester polymer which are not compatible with each other is in a range of 5/95 to 95Z5 by weight.
  • a web with a network structure in which the mixture is mixed is used as a web, and the web is then used for embossing. Then, the webs are partially thermocompression-bonded to partially bond the mixed reticulated fibers.
  • the nonwoven fabric in which the net-like fabric is bonded to the whole is used as a protective material for envelopes, wrapping materials, floppy leaves, waterproof materials, labels, heat insulating materials, synthetic paper, and sanitary materials.
  • Suitable for general-purpose applications such as protective clothing, curtains, sheets, wipers, filters, and house wraps.
  • non-woven fabrics in which the weave of the net-like structure is partially bonded are used for clothing, heat insulating materials, protective clothing for medical and sanitary materials, curtains, sheets, wipers, filers, house wraps, tents, Suitable for general purpose uses such as artificial leather.
  • the weave of the network structure according to the present invention will be described in detail.
  • textile having a network structure refers to a state in which fibril fibers equivalent to 0.01 to 10 / m are formed in a three-dimensional network and endless in the longitudinal direction of the yarn. Ori group.
  • the components constituting the textile of the present invention need to be composed of polymer components that are not compatible with each other.
  • the lack of compatibility with each other means that the mixed polymer components are present independently, meaning that the fibers have the essential fiber properties of the individual polymers.
  • mixed arrowheads of polymers that are incompatible with each other are easily divided into components by physical force.
  • the fibers of the present invention are not compatible with each other, they are mainly composed of extremely fine polymer-based fibril fibers.
  • a specific combination of polymer components for this purpose refers to a combination of an olefin polymer and an ester polymer.
  • the olefin-based polymer is mainly a polyethylene-, polypropylene- or ethylene-based copolymer or propylene. And the like to be obtained o
  • the viscosity of the ethylene polymer should be such that the Menole index value measured by the method of ASTM-D-12838E is 0.3 to 3 OgZ10 minutes. Is preferred.
  • the melt index value is less than 0.3 g / 10 minutes, the viscosity of the mixed solution becomes too high, and it becomes difficult to obtain ultrafine fibril fibers. If the melt index value exceeds 30 g Z 10 minutes, the strength of the fibrous body will decrease, and the fiber will have a slimy feel and stickiness, resulting in a fiber with poor handling. is there.
  • the viscosity of the propylene-based polymer is preferably from 1 to 40 g 10 minutes at a melt flow rate value measured by the method of ASTM-D-1238L. If the melt mouth opening rate is less than 1 g / 10 minutes, the viscosity of the mixed solution becomes too high, and it becomes difficult to obtain ultrafine fibril fibers. On the other hand, if the melt-to-mouth ratio exceeds 4 Og Z10 minutes, the strength of the fibrous body is reduced and the texture and tackiness of the textile fiber are increased, resulting in fibers with poor handling. Tend to be.
  • the relative viscosity of the polymer measured at a concentration of 0.5% at 20 ° C at a mixing ratio of tetrachlorethane and phenol of 1 to 1 (weight ratio) is 1.3 to 1 It can be applied from a textile grade of about 6 to a high-viscosity resin (relative viscosity 1.7) made by solid-state polymerization. The higher the viscosity of the polymer, the higher the fiber strength, which is the preferred direction.
  • the components constituting the fiber of the present invention need to be composed of at least a mixed polymer component which is not compatible with each other and has a melting point of 100 ° C. or more. Why it is necessary to have no compatibility with each other are as above, together why melting point is required polymer component is at least 1 0 o e c, according to regulations from a practical point of view. Melting point
  • the melting point is 120 ° C or more.
  • “at least constituted” means that the mixed polymer component accounts for 50% by weight or more in the composition ratio in the fiber. If the amount is less than 50% by weight, characteristics of the olefin polymer and the ester polymer will be lost, which is not preferable.
  • the mixing ratio (weight ratio) of the orefin-based polymer to the ester-based polymer is preferably 5Z95 to 95Z5. If the blending ratio of the coalesced is smaller than this range, the characteristics of individual polymers are lost, which is not preferable.
  • the mixing ratio of the olefin polymer is less than 5% by weight, the lightness and the fiber strength are reduced.
  • Mixing ratio of ester polymer is 5% by weight If it is less than the above, the modulus of the fiber is reduced, the waist in the case of fabric and the use ⁇ wearing feeling are lost, and the unique slimy feeling of the olefin polymer is generated. Therefore, the more preferable mixing ratio is 15/85 to 85/15, and the most preferable mixing ratio is 25/75 to 75/25.
  • a mixed polymer of an olefin-based polymer and an ester-based polymer is dissolved in a solvent in which none of these polymers is dissolved at a low temperature but is dissolved at a high temperature and a high pressure. Dissolves under high temperature and pressure. Then, after forming a single bath phase, the polymer and the solvent are spun from the nozzle in a state where they are phase-separated. Thereby, the above-mentioned textile can be manufactured.
  • this solvent examples include generally known aromatic hydrocarbons such as benzene and toluene, aliphatic hydrocarbons such as butane, pentane and isomers and homologs thereof, and alicyclic hydrocarbons. For example, hexane and unsaturated hydrocarbons may be mentioned. Also, halogenated hydrocarbons such as trichloromethane, methylene chloride, carbon tetrachloride, chloroform, 1,1-dichloro-1,2,2-difluoroethane, 1,2-dichloro-1,1,1-difluoroethane, methyl chloride, chloride Chill and the like.
  • solvents for the present invention include methylene chloride, 1,2-dichloro-1,2,2-difluoroethane, 1,2-dichloro-1,1,1-difluoroethane, and the like.
  • the concentration range cannot be unconditionally limited depending on the degree of polymerization of the polymer, the type of solvent, and the pressure, but the concentration of the polymer in the spinning mixed solution is 5 to 30% by weight, and the concentration of the solvent is 70 to 95. %. If the concentration of the polymer is less than 5% by weight, it is difficult to obtain a continuous long fiber, and if it exceeds 30% by weight, it becomes a fibrillated tubular fiber without being fibrillated, and has an extremely fine fiber. It becomes difficult to obtain high-strength fibril fibers.
  • the solvent concentration is less than 70% by weight, the solution viscosity of the spinning mixed solution becomes too high, so that the dissolution of the polymer is difficult to be uniform, so that the fiber does not become an ultrafine fibril fiber and has a hollow fiber. Tend to be. On the other hand, if the content exceeds 95% by weight, the network fiber composed of fibril fibers is not continuous, which is not preferable.
  • the stretching and orientation of the textile are performed by the explosive force accompanying the vaporization of the solvent, and the strength of the fiber depends on whether the fiber is sufficiently stretched and oriented. Often determined.
  • This explosive power is the vaporization power of the instantaneous speed. Speedy In a short time, the solvent vaporizes in less than 0.1 second, during which time the concentration of the polymer increases in a short time, and finally only the mixed polymer precipitates. The mixed polymer precipitated by the evaporation of the solvent is cooled. This cooling process is the most important for fiber strength, and in order to obtain high-strength fiber, cooling by flash flow and drawing orientation depending on the speed must be sufficient. In the production method of the present invention, since the polymers which are not compatible with each other are used, the fibrillation is sufficiently promoted by this flush flow, and an extremely fine fibril fabric can be obtained.
  • polymers which are incompatible with each other are used, so that even if the polymers are dissolved in a solvent, the polymers are easily separated from each other. It is preferable.
  • the addition of this surfactant is effective for keeping the spinning mixed solution stable in an emulsified state, and generally a nonionic surfactant can be applied.
  • the surface lubricating agent include monoesters of lauric acid, stearic acid, and oleic acid, and polyoxyethylene adducts of lauryl alcohol, stearyl alcohol, and oleyl alcohol. . The more even the mixed solution, the more extremely fine the fibril network structure fiber can be obtained.
  • the melting and spinning temperature of the spinning mixture is preferably from 170 ° C. to 240 ° C.
  • ester polymers have a large decrease in viscosity in the presence of solvents. If the temperature exceeds 240 ° C, the fibers will be colored or the decomposition will be accelerated, making it impossible to obtain fibers with high strength. It is not desirable because of the conflict. At less than 170 ° C, it does not become an ultra-fine fibril fiber, It is not preferable because it becomes fiber.
  • the duration of the dissolved state of the spinning mixture during the execution of the production method of the present invention cannot be unconditionally limited because of the balance with the melting and spinning temperatures. That is, when the temperature is high, the dissolution duration must be as short as possible, and when the temperature is relatively low, the dissolution duration can be long. It is preferable that the dissolution duration is dared to be between 5 minutes and 90 minutes. If the dissolution duration of the spinning mixture exceeds 90 minutes, the ester polymer may be colored or thermally decomposed, or the textile strength may be reduced. If the dissolution duration is less than 5 minutes, the dissolution of the polymer will be insufficient, which may cause a problem of clogging in the filter and a problem of producing a uniform fiber. Not good.
  • the pressure at the time of spinning the mixed solution in which the polymer is dissolved is not absolutely limited by the amount of the solvent, the concentration of the polymer, and the amount of the inert gas added, but is usually preferably 60 kg Zcm 2 or more. If the weight is less than 60 kg Z cm 2 , the explosive power during flash spinning is reduced, and the orientation of the fabric is reduced, so that a high-strength fiber cannot be obtained. In addition, there is a problem in that the ejection becomes uneven, and it is not possible to spin out fibers in a stable high fibril state.
  • the upper limit pressure is not particularly limited, but is preferably 180 kg / cm 2 from the viewpoint of suppressing a decrease in viscosity of the polymer.
  • the spinning mixed solution is spun under autogenous pressure or through a pressure drop chamber.
  • a nozzle for spinning a generally known nozzle can be used.
  • the polymer or the spinning mixed solution contains an anti-glazing agent, a light-proofing agent, a heat-resistant agent, a pigment, a weaving agent, a weathering agent, an ultraviolet absorbing agent generally used for textiles.
  • a collector, a heat storage agent, a stabilizer and the like can be added as long as the effects of the present invention are not impaired.
  • This nonwoven fabric is obtained by using the fibers having the above-mentioned network structure.
  • the nonwoven fabric having a dense structure refers to a nonwoven fabric having an apparent density of 0.2 g / cm 3 or more and the above-mentioned ultrafine network structure fibers adhered densely.
  • the fibers constituting the nonwoven fabric of the present invention are not compatible with each other, an extremely fine polymer-based fibril fiber is mainly constituted.
  • the finer the fiber the more dense the structure when it is made into a nonwoven fabric, and it has a higher bacterial barrier property that does not allow even smaller bacteria to pass through than a normal nonwoven fabric.
  • the fibers having a network structure are bonded to each other. This means that the fibers of the very fine fibril network structure are closely bonded at the contact points, and are not spot-like bonded. In other words, since the fibers are bonded at the contact points between the extremely fine fibril fibers, the resulting nonwoven fabric has an extremely dense structure, and has excellent strength, bacterial barrier properties, water pressure resistance and moisture permeability.
  • the nonwoven fabric of the present invention preferably has a physical strength of 20 kg, 5 cm or more per 100 g / m 2 in terms of physical properties. If the strength is less than 20 kg and 5 cm, it cannot be used for general purposes This is because the use of the nonwoven fabric is extremely limited.
  • the water vapor transmission rate showing the performance of dissipating moisture is 100 g Zm 2 / hr or more. If the moisture permeability is less than 1 0 0 g / m 2 Z hr, because the moisture is Ku difficulty is dissipated, moisture filled when used as clothing and Hausura-up, by force the condensation occurs, It may be uncomfortable or moldy and unsanitary. Therefore, the higher the value, the better the moisture permeability.
  • the water pressure is preferably 5 O cm or more.
  • the water pressure resistance is an indicator that a liquid such as water is difficult to pass. If the water pressure is less than 50 cm, a liquid such as water passes, and at the same time, bacteria pass therethrough, and the bacterial barrier property is reduced. Therefore, it cannot be applied to sanitary protection clothing. Therefore, the higher the water resistance pressure, the better.
  • a fiber having a network structure constituting the nonwoven fabric must be manufactured.
  • the flash spinning method described above is used. Applies.
  • the flush flow and the precipitated fibers collide with the rotating plate to traverse the fibers having a network structure, and then the weaving is performed.
  • the process of forming the weave of the reticulated structure is as described above.
  • the weaving method there are a triboelectric charging method using a rotating plate and a method using a subsequent corona discharge. Either method may be used or both methods may be used together.
  • the woven fiber thus opened is deposited on a conveyor to form a fiber web, and the woven fiber is thermocompression-bonded using a roll group.
  • heat As the pressure-bonding conditions, the temperature condition is set to the melting point of the polymer having the lowest melting point among the polymers constituting the fiber minus 40 ° C or more and the melting point or less, and the linear pressure condition is set to 0. It is better to select a final value of 5 kgZ cm or more and 20 kgZ cm or less. It is more preferable to perform pressure bonding with a group of rolls at room temperature in advance and then further pressure bonding under the above-mentioned conditions, because the fibers adhere firmly at the contact points of the fibril fabric.
  • thermocompression bonding is performed at a temperature exceeding the melting point of the polymer, the fiber is melted, and the effect of obtaining an ultrafine fibril fiber is reduced, which is not preferable.
  • the linear pressure is less than 0.5 kgZcm, it is not preferable because the adhesiveness across the entire fiber decreases and the strength of the nonwoven fabric decreases. In addition, if it exceeds 20 kg / cm, the fiber layer tends to be filmed, which is not preferable.
  • the above-mentioned roll group may be used in combination with a steel roll, a rubber roll, and a resin roll.
  • a steel roll When a steel roll is applied, it is preferable to coat a fluorinated polyethylene resin, rubber, or the like, since the resulting nonwoven fabric can be prevented from having an unusual luster.
  • Two to thirty rolls can be used.
  • a device for such a roll group it is most preferable to use a device called a calendar roll machine.
  • the basis weight can be adjusted by changing the traversing state ⁇ conveyor speed, but a significant basis weight change can be achieved by laminating the formed web or nonwoven fabric.
  • This nonwoven fabric can also be obtained by using the above-mentioned fibers having a network structure.
  • the nonwoven fabric needs to have partially bonded fibers between the fibers having a network structure.
  • the extremely fine fibril fibers are partially adhered to each other by the polymer as the low melting point component, so that the shape of the nonwoven fabric is maintained. Since the fibers of the part that are not partially adhered are composed of fibers with an extremely fine fibril network structure, it becomes a flexible non-woven fabric with a dense structure, and it becomes a non-woven fabric with excellent strength and moisture permeability. . In addition, such a dense structure inevitably has a bacterial barrier property.
  • This partially bonded state can be represented by a bonded area ratio.
  • the bonded area ratio was obtained by using a small piece of nonwoven fabric, enlarging and photographing with a scanning electron microscope, and measuring the ratio of the sum of the areas of the point bonded parts to the area of the minimum repeating unit individually 10 times. It is measured based on the average value.
  • the bonding area ratio is preferably 50% or less. If the content exceeds 50%, the number of bonded portions increases and the freedom of unfixed fibers in the nonwoven fabric is restricted, and the texture of the nonwoven fabric tends to be hard and lack flexibility. If the bonding area ratio is too small, Practically, 4% or more is preferable because morphology is deteriorated. For this reason, a value of 5% or more and 30% or less is most preferable.
  • This partially bonded state can also be represented by the bonding point density.
  • the adhesion point density is calculated by using a small piece of non-woven fabric, enlarging and photographing with a scanning electron microscope, and converting the ratio of the sum of the number of points adhered to the area of the minimum repeating unit to square centimeters. Calculated as the average of 10 measurements. Bonding point density is 1 and five Z cm 2 or more and 1 2 0 Z crn 2 or less is this is Shi favored. If the number is less than 15 pieces / cm 2, the morphology of the nonwoven fabric will be reduced, and the abrasion resistance of the nonwoven fabric will be further reduced, causing problems such as fluffing.
  • the size be 120 cm 2 or less. From the above, as a more preferred range, 2 0 Z cm 2 or more and 1 0 0 / cm 2 or less, 3 0 Z cm 2 or more and 9 0 Z cm 2 or less as the most preferred correct range Should be selected.
  • both the adhesion area ratio and the adhesion point density are within the above ranges.
  • bonding portions may be any shape such as a round shape, an elliptical shape, a diamond shape, a triangular shape, a T shape, a single shape, a well shape or a lattice shape.
  • the strength converted to a basis weight of 100 g / m 2 is 5 kg / 5 cm or more. If the strength is less than 5 kg / 5 cm, practical problems may occur, and the use of the nonwoven fabric is extremely limited.
  • the compression stiffness is preferably 200 g or less. The compression stiffness indicates the flexibility of the nonwoven fabric, and the smaller the value, the higher the flexibility. Here, the compression stiffness was measured by the following method. First, a sample width of 50 samples is taken in the machine direction (longitudinal direction) of the nonwoven fabric, and five sample pieces having a sample length of 100 in the direction orthogonal to this direction are prepared.
  • the moisture permeability is preferably 100 gZm 2 Zhr or more.
  • the moisture permeability indicates the performance of dissipating moisture, and the larger the value, the better the performance. If the moisture permeability is less than 10 O g / m 2 / hr, it will be difficult to dissipate the moisture, so when used as clothing or house wrap, it will be filled with moisture and eventually form dew It may be uncomfortable or cause mold to develop, resulting in unsanitary conditions. Therefore, the higher the value, the better the moisture permeability.
  • the basis weight of this nonwoven fabric can be 500 g / m 2 for thick ones, but usually 20 to 200 g / m 2 is applied.
  • this nonwoven fabric In order to manufacture this nonwoven fabric, first, the mesh structure that constitutes the nonwoven fabric The fiber must be manufactured, but the flash spinning method as described above is applied to the manufacture of this network-structured fiber.
  • the fiber opening method there are a triboelectric charging method using a rotating plate and a method using corona discharge thereafter. Either method may be used or both methods may be used.
  • Embossing machines include hot embossing machines and pin sonic machines using ultrasonic waves.
  • the temperature condition should be not less than the melting point minus 40 and not more than the melting point of the polymer having the lowest melting point among the polymers constituting the textile. It is preferable to select a linear pressure condition of 0.5 kgZ cm or more and 50 kgZ cm or less. Under the condition of applying the linear pressure in this range, 0.0 2 ⁇ ! It may be processed by taking a clearance of ⁇ 0.2 mm. Clearance is used to prevent the crimping points from being completely fused and formed into a film, and the proper use can be made according to the intended use.
  • thermocompression bonding is performed at a temperature higher than the melting point of the polymer during embossing, the fibers may melt and the web may be taken up by the roller, making it impossible to form a sheet.
  • the effect of fusing ultrafine fibril fibers is reduced due to fusion of the fibers having a fine network structure. Tend to be bad.
  • the linear pressure is less than 0.5 kg / cm, the adhesion at the press-bonding point between the fibers will decrease, and the strength of the nonwoven fabric will decrease. If it exceeds, the crimping point tends to be formed into a film, and if it exceeds that, a perforated nonwoven fabric is not preferable.
  • the crimping conditions in the case of the pin sonic processing machine may be such that the fibers are partially fused by, for example, ultrasonic vibration of about 20 kHz to maintain the nonwoven fabric form.
  • the degree of fusion may be arbitrarily selected by changing the amplitude of the ultrasonic wave. If this ultrasonic fusion method is applied, when bonding a large heat-fusible tube, heat is hardly affected except for the bonded part, so that the heat-shrinkability of the entire nonwoven fabric is maintained. Will be. Therefore, when producing a nonwoven fabric having high heat shrinkability, the effect is further exhibited.
  • the embossing form of these embossing machines is generally formed by an engraving roll and a flat roll having a projecting pattern.
  • the projecting pattern can be constituted by mainly controlling the above-mentioned bonding area ratio and bonding point density.
  • the shape of the tip surface of the projections of these engraving rolls can be any shape such as a round shape, an elliptical shape, a diamond shape, a triangular shape, a T shape, a-shape, a well shape, or a lattice shape.
  • embossing process may be performed before or after embossing under further different conditions or under the above-mentioned conditions, or calendaring may be used together.
  • the temperature giving the extreme value of the melting absorption curve measured at a heating rate of 20 ° C / min was defined as the melting point.
  • the positive weave was determined according to JISL—109.
  • the initial tensile resistance (g / d) was used as the modulus value in accordance with “JISL-1013.10.10 Initial tensile resistance measurement”.
  • Disperse dye Blue E-FBL Suditomo Chemical
  • Dispersant Disperser-TL Dispersant Disperser-TL
  • formic acid as auxiliary 0.1 g Z liter
  • the mixture was boiled for 60 minutes at a bath ratio of 1:50.
  • Apparent density (g / cm 3 ) basis weight (g / m 2 ) / thickness () / 1000 moisture permeability of nonwoven fabric;
  • the moisture permeability (g / m 2 Zhr) was measured under the conditions of a temperature of 40 ° C and a humidity of 90% according to JIS-L109-9-A-1.
  • the obtained textile had an extremely good fibril state, no coloring of the fiber was observed, and the textile strength was high with a high modulus.
  • this textile was dyed with a disperse dye, it was confirmed that the textile could be clearly dyed.
  • the properties of this fiber were as follows:
  • the time from reaching the temperature of 100 ° C to reaching the temperature of 200 ° C was 30 minutes, and stirring was performed for 10 minutes after the temperature reached 200 ° C to obtain a homogeneous solution. .
  • the pressure at this time showed a gauge pressure of 105 kg / cm 2 .
  • the pressure in the pressure drop chamber was 85 kgcm 2 .
  • the obtained fiber had a very good fibril state, no coloring of the fiber, and a high fiber strength / modulus.
  • a disperse dye it was confirmed that the textile could be dyed clearly.
  • the properties of this fiber were as follows:
  • a textile was produced under exactly the same conditions as in Example 2 except that the melting and spinning temperatures were set at 200 ° C.
  • the pressure during dissolution was 105 kg / cm 2
  • the pressure in the descending chamber was 86 kg / cm 2 .
  • the resulting fiber had a very good fiprill state, no coloration of the fiber, and a high fiber strength / modulus.
  • this arrowhead was dyed with a cationic dye, it was confirmed that only the polyester component could be dyed clearly.
  • the characteristics of this textile were as follows.
  • the solution concentration of each component is as shown in Table 1, and the temperature reached 100 ° C. The time until the temperature reached 200 ° C. was 35 minutes. After the temperature reached 200 ° C., stirring was continued for 10 minutes to obtain a homogeneous solution. The pressure at this time showed a gauge pressure of about 110 kg / cm 2 .
  • the next continuous infusion device for high pressure nitrogen gas, while applying passage so that the pressure in the O Tok Leeb is maintained 1 1 O kg / cm 2, and immediately opens the valve, pore size 0 with a pressure drop chamber. Spinning into the atmosphere was performed from a nozzle with L / D l at 750.
  • Example 4 5/95 91 4.45 59 12.5 28 ⁇ 3 ⁇ 43 ⁇ 4
  • Example 5 15/85 91 4.68 58 13.5 36 ⁇
  • Difficult 6 50/50 92 5.28 51 14.6 43 ⁇
  • Example 7 85/15 91 3.56 52 13.2 34 ⁇
  • Wei example 8 95/5 92 2.26 50 8.3 24 ⁇ ⁇
  • Example 2 100/0 91 0.85 46 4.8 18 ⁇
  • Comparative Example 1 the obtained textile had a good fibril state and relatively high fiber strength and modulus. However, the dyeability with the disperse dye was poor because no polyester was contained. In Comparative Example 2, although the obtained textile did not contain any polyethylene, the dyeability with the disperse dye was good, but the fibril state was not so good, and the textile strength / modulus was low. It was.
  • Example 6 The same conditions as in Example 6 were used except that the melting and spinning temperature was 200 ° C. using polyethylene terephthalate having a melting point of 228 and a relative viscosity of 7? Rel of 1.7. Fiber was produced. The pressure during dissolution was 112 kg Z cm 2 , and the pressure in the descending chamber was 93 kg / cm 2 .
  • the obtained fiber had a very good fipril state, no coloration of the textile, and a high fiber strength / modulus.
  • the textile was dyed with a disperse dye, it could be dyed well.
  • the properties of this fiber were as follows:
  • Example 10 High density with 10 liter autoclave, melting point 1332 ° C, density 0.96 g / cm 3 , and Menole index value 0.8 g Z 10 min 600 g of polyethylene, 900 g of polyethylene terephthalate having a melting point of 256 ° C. and a relative viscosity rel of 1.7, and methylene chloride as a solvent were applied to the autocrepe. did. Further, as a surfactant, lauryl ether to which 3 mol of polyoxyethylene was added and isotridecyl stearate were added in an amount of 0.2% by weight based on the mixed polymer.
  • the solution concentration of each component was 20% by weight of the polymer and 80% by weight of the solvent.
  • Seki ⁇ this Uwebu, 3 through a hydraulic click Reala Nsukarenda One machine with pairs of rollers to produce a basis weight 5 0 gZm 2 of the nonwoven fabric, urethane rubber upper roller either the surface of the calender One machine
  • the lower roller has a fluororesin coating on the steel surface. It was a heating port.
  • the temperature and linear pressure from the first roller to the third roller were 60, 120, 125 ° C, 0.3, 0.8, and 1.5 kgZcm, respectively.
  • the obtained non-woven fabric has a very good fibril state of the fiber, no coloration is observed, and since the fibers are bonded over the entire surface, the non-woven fabric has high strength, high moisture permeability, and high water pressure resistance. It was a thing. In addition, when this nonwoven fabric was dyed with a disperse dye, it was confirmed that clear dyeing was possible. The characteristics of this nonwoven fabric were as follows.
  • Example 10 Using the same apparatus as in Example 10, there were prepared 400 g of polypropylene having a melting point of 16 2 ° C, a density of 0.910 g / cm 3 , and a melt flow rate of 4 g Z 10 minutes.
  • An autoclave was charged with polyethylene terephthalate 1100 having a melting point of 256 and a relative viscosity of 7 to rel 6, and methylene chloride as a solvent.
  • methylene chloride as a solvent.
  • lauryl ether to which 3 mol of polyoxyethylene was added and isooctyl laurate were added in an amount of 0.2% by weight based on the mixed polymer.
  • the time from reaching the temperature of 100 ° C to reaching the temperature of 200 ° C was 30 minutes, and stirring was performed for 10 minutes after the temperature reached 200 ° C to obtain a homogeneous solution. .
  • the pressure at this time showed a gauge pressure of 118 kgZcm 2 .
  • the pressure in the downcomer was 9.9 kg / cm 2 .
  • this web was laminated, and the temperatures of the first roller to the third roller in the single calender were set to 60 eC, 150 ° C, and 150 ° C, respectively.
  • a nonwoven fabric having a basis weight of 10 Og / m 2 was produced.
  • the obtained non-woven fabric has a very good fibril state of the fiber, no coloration is observed, and since the fiber is bonded to the entire surface, the non-woven fabric has high strength, moisture permeability, and heat resistance. The water pressure was also high. When this nonwoven fabric was dyed with a disperse dye, it was confirmed that the nonwoven fabric could be dyed clearly.
  • the properties of the obtained nonwoven fabric were as follows.
  • the obtained non-woven fabric has a very good fibril state of the fiber, no coloring, and because the fabric is bonded over the entire surface, the non-woven fabric has high strength, high moisture permeability and high water pressure resistance. It was a thing. In addition, when this nonwoven fabric was dyed with a cationic dye, it was confirmed that it could be dyed clearly. The characteristics of this nonwoven fabric were as follows.
  • Example 10 Using the apparatus of Example 10, a high-density polyether having a melting point of 13 ° C., a density of 0.96 g Zcm 3 and a melt index of 0.6 g 10 minutes was used.
  • the amount of methylene chloride as a solvent was changed to 620 O while changing the mixing ratio of ethylene and polyethylene terephthalate, which had a melting point of 256 ° C and a relative viscosity of 77 rel. g—As usual, filled with autocrap.
  • As a surfactant lauryl ether to which 3 moles of polyoxyethylene had been added and isooctyllaurate were added in an amount of 0.2% by weight based on the mixed polymer, and the autoclave was closed. Subsequently, nitrogen was injected into the autoclave so as to be 40 kg / cm 2. Stirring was started at an appropriate speed and heating was started.
  • the solution concentration of each component is as shown in Table 2.
  • the time to reach temperature 200 ° C after reaching temperature 100 ° C is 35 minutes, and after reaching temperature 200 ° C. Stirring was continued for 10 minutes to obtain a homogeneous solution.
  • the pressure at this time showed a gauge pressure of about 11 O kgZ cm 2 .
  • PET polyethylene terephthalate
  • the nonwoven fabric obtained was extremely good, while the dyeability with the disperse dye tended to be better as the polyester mixing ratio increased. It was in a fibril arrowhead state and was not colored. Moreover, since the fibers are bonded over the entire surface, the nonwoven fabric has high strength, high moisture permeability and high water pressure resistance.
  • the obtained nonwoven fabric had a good fibril state and a relatively high nonwoven fabric strength, but was poor in dyeability because it did not contain any polyester.
  • the pressure during dissolution was 112 kg / cm 2
  • the pressure in the descending chamber was 93 kg / cm 2 .
  • the obtained non-woven fabric has very good fibril state of the fiber, no coloring, and because the fabric is bonded to the whole surface, the non-woven fabric has high strength, high moisture permeability and high water pressure resistance. It was. In addition, when this nonwoven fabric was dyed with a disperse dye, it was confirmed that the nonwoven fabric could be dyed clearly.
  • the characteristics of this nonwoven fabric were as follows.
  • High density polyethylene 600 with 96 g / cm 3 and a melt index value of 0.8 g / 10 minutes, melting point 256 ° C, and relative viscosity 7-rel 1.7 900 g of polyethylene terephthalate and methylene chloride as a solvent were filled in the autoclave. Further, isooctyl stearate and isostearyl ester were added as surfactants in an amount of 0.2% by weight based on the mixed polymer.
  • the solution concentration of each component was 20% by weight of the polymer and 80% by weight of the solvent.
  • the time from reaching 100 ° C to reaching 220 ° C is 40 minutes, and stirring is continued for 10 minutes after reaching 220 ° C to obtain a homogeneous solution.
  • the pressure at this time showed a gauge pressure of 109 kg / cm 2 .
  • the web was laminated and passed through a hydraulic clear embossing machine to produce a nonwoven fabric having a basis weight of 50 g / m 2 .
  • the upper roll of this embossing machine was an engraving roll
  • the lower roll was a flat roll
  • both were heating rolls.
  • Embossing was performed at a linear pressure of 20 kg / cm, a temperature of 125 ° C, and a speed of 10 m / min without taking the clearance between the upper and lower rolls.
  • the adhesion area ratio of the engraving roll was 25%, and the adhesion point density was 60 pieces Zcm 2 .
  • the fibril state of the fibers was extremely good, and no coloring was observed.
  • this fabric had many small crimp points, it had excellent flexibility and moisture permeability while maintaining practical nonwoven fabric strength.
  • this nonwoven fabric was dyed using a disperse dye, it was confirmed that the nonwoven fabric could be dyed clearly.
  • the characteristics of this nonwoven fabric were as follows.
  • Example 19 Using the same apparatus as in Example 19, a polypropylene having a melting point of 16 2 ° C, a density of 0.910 g / cm 3 , and a melt flow rate of 4 g 10 minutes was used.
  • An autoclave was filled with 400 g of pyrene, polyethylene terephthalate 110 with a melting point of 256 ° C and a relative viscosity of 77 rel, and methylene chloride as a solvent. did. Isooctyl stearate and isostearyl ester were added as surfactants in an amount of 0.2% by weight based on the mixed polymer.
  • the autoclave was closed, nitrogen was subsequently injected into the autoclave until the pressure reached 40 kg / cm 2 , stirring was started at an appropriate speed, and heating was started.
  • the concentration of the mixed polymer in the solution was 20% by weight, and the concentration of the solvent was 80% by weight.
  • the time from reaching the temperature of 100 ° C to reaching the temperature of 200 ° C was 30 minutes, and stirring was performed for 10 minutes after the temperature reached 200 ° C to obtain a homogeneous solution. .
  • the pressure was shown a gauge pressure of 1 1 8 kgZ cm 2.
  • the pressure in the downcomer was 9.9 kg / cm 2 .
  • this web was laminated, and a nonwoven fabric having a basis weight of 100 g Zm 2 was produced in the same manner as in Example 19 except that the embossing temperature was set at 120.
  • the obtained non-woven fabric has a very good fibril state of the fiber, no coloration is observed, and since this fiber has a structure in which many small crimping points are present, it is possible to maintain the strength of a practical non-woven fabric, It was excellent in flexibility and moisture permeability. In addition, when this nonwoven fabric was dyed with a disperse dye, it was confirmed that clear dyeing was possible.
  • the characteristics of this nonwoven fabric were as follows. Specific surface area: 2 9 m 2 / g
  • Example 20 Melting point 247 ° C, relative viscosity? Exactly the same as Example 20 except that polyethylene terephthalate copolymerized with 5 mol% of sulfoisophthalic acid having a rel of 1.3 was used and the melting and spinning temperature was set at 200 ° C. A non-woven fabric was manufactured under the conditions. The pressure during melting was 11 S kgZcm 2 , and the pressure in the descending chamber was 100 kgZcm 2 .
  • the obtained non-woven fabric has a very good fibril state of the fiber, no coloration is observed, and since this fabric has many small crimp points, it maintains practical non-woven fabric strength, It was excellent in flexibility and moisture permeability.
  • this nonwoven fabric was dyed using a cationic dye, it was confirmed that the nonwoven fabric could be dyed clearly.
  • the characteristics of this nonwoven fabric were as follows.
  • Example 19 high-density polyethylene having a melting point of 132 ° C., a density of 0.96 g / cm 3 , and a melt index value of 0.6 g of ZIO, and a melting point of While changing the mixing ratio with polyethylene terephthalate having a viscosity of 2.5 and a relative viscosity of 7? 1.4, the amount of methylene chloride as a solvent was 6200 g— Filled with auto creep. Isooctyl stearate and isostearyl ester were added as surfactants in an amount of 0.2% by weight based on the mixed polymer, and the autoclave was closed. Subsequently, nitrogen was injected into the autoclave so as to be 40 kg / cm 2 , stirring was started at an appropriate speed, and heating was started.
  • the solution concentration of each component is as shown in Table 3, and the time from reaching 100 ° C to reaching 200 ° C is 35 minutes, and reaching 200 ° C. The stirring was continued for 10 minutes to obtain a homogeneous solution. The pressure at this time showed a gauge pressure of about 11 O kgZ cm 2 . Then, by continuous infusion device of the high pressure nitrogen gas, while applying passage so that the pressure in the O Tok Leeb is maintained at 1 1 0 kgZ cm 2, subjected to spun immediately open three valves, implemented A web was formed in the same manner as in Example 19 to obtain a nonwoven fabric.
  • PET polyethylene terephthalate
  • PE high-density polyethylene *: density / cm 3 * *: moisture permeability g / m 2 / r
  • the obtained nonwoven fabric was extremely good, as the mixing ratio of the polyester increased, and the dyeability with the disperse dye tended to improve. It is a non-woven fibrous state, has no coloration, and has a structure with many small crimp points, so that it retains the strength of a practical non-woven fabric and has flexibility and moisture permeability. It was excellent. In addition, when these nonwoven fabrics were dyed using a disperse dye, it was confirmed that clear dyeing was possible. In Comparative Example 5, the obtained nonwoven fabric had a good fibril state and a relatively high nonwoven fabric strength, but had no dyeability because it did not contain any polyester.
  • Example 24 Exactly the same conditions as in Example 24 except that the melting and spinning temperature was set at 200, using polybutylene terephthalate having a melting point of 228 ° C and a relative viscosity of 7? Produced a nonwoven fabric.
  • the pressure during dissolution was 112 kg / cm 2
  • the pressure in the descending chamber was 93 kg / cm 2 .
  • the obtained non-woven fabric has a very good fibril state of the fiber, no coloration is observed, and since this fiber has many small crimping points, it is flexible while maintaining practical non-woven fabric strength. It had excellent properties and moisture permeability.
  • this nonwoven fabric was dyed using a disperse dye, it was confirmed that the nonwoven fabric could be dyed clearly.
  • the characteristics of this nonwoven fabric were as follows. Specific surface area: 3 1 m 2 / z
  • the nonwoven fabrics of Examples 28 to 33 are practically useful, while the strength of the nonwoven fabric tends to increase and the flexibility tends to decrease as the bonding area ratio and the bonding point density increase. It was excellent in flexibility and moisture permeability while maintaining the strength of the nonwoven fabric.
  • Example 34 since the bonding area ratio was 100% because of the pressure bonding using only the flat rolls, the obtained nonwoven fabric was slightly inferior in flexibility, but practical nonwoven fabric strength and excellent moisture permeability were obtained. And made.
  • PET polyethylene terephthalate
  • PE high-density polyethylene *: visibility / cm 3 **: moisture permeability / m 2 /

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  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Artificial Filaments (AREA)

Abstract

L'invention concerne une fibre ultrafine ayant une structure réticulée, les défauts présentés par un polymère d'oléfine et ceux présentés par un polymère d'ester étant contrebalancés par le fait que l'on tire profit des qualités de ces deux polymères. L'invention concerne également un non-tissé constitué de telles fibres et présentant une structure dense. Cette fibre est produite à partir d'un mélange comprenant au moins un polymère d'oléfine et un polymère d'ester mutuellement incompatibles, ladite fibre ayant une structure réticulée. Elle est fibrillée à un degré jamais atteint jusqu'ici, sa résistance et son module sont élevés, et on peut la teindre. Le non-tissé selon l'invention contient des fibres à structure réticulée constituées d'un mélange comprenant un polymère d'oléfine et un polymère d'ester incompatibles, dans une proportion de 5/95 à 95/5, ces fibres étant liées l'une à l'autre complètement ou partiellement. Ce non-tissé est très résistant, très perméable à l'eau, très résistant à la pression de l'eau, et on peut le teindre.
PCT/JP1994/000581 1993-04-08 1994-04-06 Fibre a structure reticulee, non-tisse constitue de telles fibres, et procede de production de la fibre et du non-tisse WO1994024347A1 (fr)

Priority Applications (4)

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JP52296894A JP3317703B2 (ja) 1993-04-08 1994-04-06 網状構造の繊維およびその製造方法
DE69431745T DE69431745T2 (de) 1993-04-08 1994-04-06 Faser mit netzwerkstruktur, daraus gebildeter vliesstoff und verfahren zur herstellung der faser und des vliesstoffes
EP94912067A EP0645480B1 (fr) 1993-04-08 1994-04-06 Fibre a structure reticulee, non-tisse constitue de telles fibres, et procede de production de la fibre et du non-tisse
US08/791,344 US5786284A (en) 1993-04-08 1997-01-31 Filament having plexifilamentary structure, nonwoven fabric comprising said filament and their production

Applications Claiming Priority (6)

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JP8158493 1993-04-08
JP5/81585 1993-04-08
JP8158593 1993-04-08
JP5/81584 1993-04-08
JP5/104870 1993-05-06
JP10487093 1993-05-06

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JP2006009182A (ja) * 2004-06-24 2006-01-12 Asahi Kasei Fibers Corp 耐毛羽性に優れた高耐水圧ポリエステル不織布
CN114293322A (zh) * 2021-12-31 2022-04-08 湖北拓盈新材料有限公司 高透湿低渗水复合无纺布的制备方法

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US6096421A (en) * 1996-01-11 2000-08-01 E. I. Du Pont De Nemours And Company Plexifilamentary strand of blended polymers
US8513147B2 (en) 2003-06-19 2013-08-20 Eastman Chemical Company Nonwovens produced from multicomponent fibers
US20040260034A1 (en) 2003-06-19 2004-12-23 Haile William Alston Water-dispersible fibers and fibrous articles
US7892993B2 (en) 2003-06-19 2011-02-22 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
EP2096198A1 (fr) * 2008-02-26 2009-09-02 Total Petrochemicals Research Feluy Fibres de polyoléfine chargées de polymères polaires, rigides et incompatibles
US8512519B2 (en) 2009-04-24 2013-08-20 Eastman Chemical Company Sulfopolyesters for paper strength and process
US20120183861A1 (en) 2010-10-21 2012-07-19 Eastman Chemical Company Sulfopolyester binders
US8882963B2 (en) 2012-01-31 2014-11-11 Eastman Chemical Company Processes to produce short cut microfibers
US9303357B2 (en) 2013-04-19 2016-04-05 Eastman Chemical Company Paper and nonwoven articles comprising synthetic microfiber binders
US9605126B2 (en) 2013-12-17 2017-03-28 Eastman Chemical Company Ultrafiltration process for the recovery of concentrated sulfopolyester dispersion
US9598802B2 (en) 2013-12-17 2017-03-21 Eastman Chemical Company Ultrafiltration process for producing a sulfopolyester concentrate
US9580845B2 (en) 2014-06-09 2017-02-28 The Procter & Gamble Company Nonwoven substrate comprising fibers comprising an engineering thermoplastic polymer

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JP2006009182A (ja) * 2004-06-24 2006-01-12 Asahi Kasei Fibers Corp 耐毛羽性に優れた高耐水圧ポリエステル不織布
JP4494094B2 (ja) * 2004-06-24 2010-06-30 旭化成せんい株式会社 耐毛羽性に優れた高耐水圧ポリエステル不織布
CN114293322A (zh) * 2021-12-31 2022-04-08 湖北拓盈新材料有限公司 高透湿低渗水复合无纺布的制备方法

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DE69431745T2 (de) 2003-09-04
EP0645480A1 (fr) 1995-03-29
DE69431745D1 (de) 2003-01-02
JP3317703B2 (ja) 2002-08-26
EP0645480B1 (fr) 2002-11-20
EP0645480A4 (fr) 1995-05-03

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