WO2022145874A1 - Tissus non-tissés filés-liés ayant une structure âme-gaine et procédé de fabrication de ceux-ci - Google Patents

Tissus non-tissés filés-liés ayant une structure âme-gaine et procédé de fabrication de ceux-ci Download PDF

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WO2022145874A1
WO2022145874A1 PCT/KR2021/019707 KR2021019707W WO2022145874A1 WO 2022145874 A1 WO2022145874 A1 WO 2022145874A1 KR 2021019707 W KR2021019707 W KR 2021019707W WO 2022145874 A1 WO2022145874 A1 WO 2022145874A1
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Prior art keywords
sheath
nonwoven fabric
core
thickness
melting point
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PCT/KR2021/019707
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English (en)
Korean (ko)
Inventor
장정순
이민호
조희정
박영신
최우석
강동헌
Original Assignee
코오롱인더스트리 주식회사
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Priority claimed from KR1020210185018A external-priority patent/KR102617463B1/ko
Application filed by 코오롱인더스트리 주식회사 filed Critical 코오롱인더스트리 주식회사
Publication of WO2022145874A1 publication Critical patent/WO2022145874A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • 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
    • 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
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a core-sheath-type spunboard nonwoven fabric for a high-breathable filter support excellent in mechanical properties, air permeability and anti-wrinkle properties, and a method for manufacturing the same.
  • Non-woven fabric is a product made by arranging filaments in the form of cotton, and is largely divided into short-fiber non-woven fabric and long-fiber non-woven fabric depending on the length of the filament.
  • Short fiber nonwoven fabric is a product made by arranging short fibers of 5 mm or less in the form of cotton and entangling between fibers or bonding with resin, and has a high elongation.
  • Long-fiber nonwoven fabric is a product made by arranging unbroken fibers in a cotton pattern, entangling fibers or bonding resin, and has high strength.
  • nonwoven fabric for filter support it was manufactured by performing complex spinning in a fineness range of 2.0 to 4.0 denier.
  • the method showed a limitation in improving the air permeability of the nonwoven fabric due to the fineness of the filament too fine.
  • An object of the present specification is to provide a spunbond nonwoven fabric having excellent air permeability and mechanical properties, as well as excellent anti-wrinkle properties, and a method for manufacturing the same.
  • a core portion including polyester having a melting point of 255° C. or higher;
  • the sheath has a thickness of 0.8 to 1.9 ⁇ m based on the thickness of the nonwoven fabric 0.24 mm to 0.29 mm when the weight per unit area is 65 ⁇ 5 g / m 2 ,
  • a spunbond nonwoven fabric is provided.
  • It provides a method for manufacturing the core-sheath-type spunbond nonwoven fabric comprising a.
  • first component may be referred to as a second component
  • second component may be referred to as a first component
  • a core portion comprising a polyester having a melting point of 255 °C or more; and a sheath portion including a copolymer having a melting point of 160 to 230°C; a nonwoven fabric comprising a nonwoven web of core-sheath type composite fibers formed by composite spinning, and having an overall average fineness of 7 to 12 denier, wherein the sheath portion per unit area
  • a spunbond nonwoven fabric having a thickness of 0.8 to 1.9 ⁇ m based on a thickness of 0.24 mm to 0.29 mm of the nonwoven fabric may be provided.
  • the present inventors solved the problem of the limitation of air permeability improvement of the conventional nonwoven fabric for filter support and conducted continuous research to provide a nonwoven fabric with excellent anti-wrinkle properties and mechanical properties.
  • melting points having high and low melting points By using two different types of resins to exhibit coarse fineness (average fineness) in a certain range with a sheath-core type composite melt spinning method, and at the same time, by controlling the thickness of the low melting point resin constituting the sheath , it was confirmed that it can exhibit superior air permeability, tensile strength, and anti-wrinkle rate and can provide a product with excellent radioactivity compared to the prior art, thereby completing the present invention.
  • the spunbond nonwoven fabric according to the present specification is a core-sheath type, and has excellent mechanical properties and quality index as well as air permeability.
  • the core-sheath-type spunbond nonwoven fabric may be a nonwoven fabric made of a core-sheath composite fiber using two types of resin raw materials having different melting points.
  • the spunbond nonwoven fabric may include a polyester resin having a high melting point as a core part and a copolymer having a low melting point as a sheath part.
  • the polyester resin having a high melting point may include a polyester having a melting point of 255 °C or higher.
  • the copolymer having a low melting point may include a copolymer having a melting point of 160 to 230°C.
  • the spunbond nonwoven fabric is provided using a sheath-core-type composite spinning method, and by controlling the thickness and overall denier of the sheath in a specific range, it is possible to control the properties of the spinning and nonwoven fabric.
  • the core-sheath-type spunbond nonwoven fabric may have an overall average fineness (large fineness) of 7 to 12 denier. If the overall average fineness is 7 denier or less, air permeability may be defective due to a decrease in pore size. In addition, if the overall average fineness is 12 denier or more, spinning failure (cutting, agglomeration) may occur due to poor cooling, and thus a nonwoven fabric cannot be manufactured.
  • the core-sheath-type spunbond nonwoven fabric according to the present specification is characterized in that it has an average fineness in the above range and a thickness of the sheath portion of a certain thickness.
  • FIG. 1 is a cross-sectional view of a filament of a core-sheath-type spunbond nonwoven fabric according to an embodiment of the present invention (a: thickness of the sheath).
  • the core-sheath-type spunbond nonwoven fabric may include a sheath portion having a core portion in the center, and a predetermined thickness (a) on the periphery thereof.
  • the shape of the spunbond nonwoven fabric is not limited, and may have a circular cross-sectional structure in FIG. 1 .
  • the core-sheath-type spunbond nonwoven fabric including the core part and the sheath part has a weight per unit area of 65 ⁇ 5 g/m 2 (ie, 60-70 g/m 2 ) or 65 g
  • the nonwoven fabric may have a thickness of 0.24 mm to 0.29 mm or 0.24 mm to 0.28 mm.
  • the sheath portion when the weight per unit area is 65 ⁇ 5 g/m 2 , the sheath portion may have a thickness of 0.8 to 1.9 ⁇ m based on the thickness of the nonwoven fabric 0.24 mm to 0.29 mm.
  • the sheath portion may have a thickness of 0.8 to 1.9 ⁇ m based on the thickness of the nonwoven fabric 0.24 mm to 0.28 mm when the weight per unit area is 65 ⁇ 5 g/m 2 .
  • the sheath portion may have a thickness of 0.8 to 1.8 ⁇ m based on the thickness of the nonwoven fabric 0.24 mm to 0.29 mm.
  • the inter-filament bonding force can be optimized, and the spinning and nonwoven properties can be more effectively controlled.
  • the sheath portion may have a thickness of 0.8 to 1.8 ⁇ m based on the thickness of the nonwoven fabric 0.24 mm to 0.28 mm when the weight per unit area is 65 ⁇ 5 g/m 2 .
  • the thickness of the sheath is less than 0.8 ⁇ m, the bonding force between the filaments is reduced, and there is a problem of delamination of the nonwoven fabric and poor strength and bending state.
  • the thickness of the sheath may be performed by appropriately adjusting the discharge amount of the melt of the core and the sheath and the number of pore pores in the nozzle in the complex spinning process of the core and sheath materials.
  • the core-sheath-type spunbond nonwoven fabric may exhibit an overall average fineness (large fineness) of 7 to 12 denier.
  • the core-sheath type spunbond nonwoven fabric includes a composite fiber web using a sheath-core type composite spinning method using the high-melting point and low-melting point resin, and thus has excellent mechanical properties, as well as air permeability and anti-wrinkle compared to the prior art performance can be improved.
  • the spunbond nonwoven fabric has a tensile strength of 19 kgf/5 cm or more according to the standard test method of KS K 0521, an anti-wrinkle rate of 50% or less according to the standard test method of MS 343-11, and a breathability of 350 ccs according to the standard test method of ASTM D737 can have more
  • the core-sheath spunbond nonwoven fabric has a tensile strength of 19 kgf/5 cm or more or 19 to 25 kgf/5 cm according to the standard test method of KS K 0521 based on a weight per unit area of 65 ⁇ 5 g/m2 can indicate
  • the core-sheath-type spunbond nonwoven fabric has an anti-wrinkle rate of 50% or less or 45-50% or 45-49 according to the standard test method of MS 343-11 based on a weight per unit area of 65 ⁇ 5 g/m2 % can be expressed.
  • the core-sheath type spunbond nonwoven fabric may exhibit air permeability of 350 ccs or more or 350 to 380 ccs according to the standard test method of ASTM D737 based on a weight per unit area of 65 ⁇ 5 g/m 2 .
  • the polyester resin having a high melting point has an intrinsic viscosity (IV) of at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polynaphthalene terephthalate, and recycled raw materials thereof of 0.60 to 0.90 dl/g and 255 It may include a polyester polymer having a melting point of °C or higher.
  • the copolymer having a low melting point may be at least one selected from the group consisting of copolyesters and polyamide-based resins having a melting point of 160 to 230°C.
  • the copolyester may include copolyethylene terephthalate having a melting point of 160 to 230° C. copolymerized with adipic acid (AA), isophthalic acid (IPA), and NPG.
  • AA adipic acid
  • IPA isophthalic acid
  • NPG NPG
  • the polyamide-based resin may be at least one selected from the group consisting of nylon 6, nylon 66, nylon 46, nylon 11, nylon 12, nylon 610, nylon 612, and a copolymer of nylon 6/66.
  • the spunbond nonwoven fabric may have an apparent density of 0.23 to 0.27 g/cm 3 when the weight per unit area is 65 ⁇ 5 g/m 2 . If the apparent density is 0.23 g/cm 3 or less, there is a problem in that strength and anti-wrinkle properties are poor, and when it exceeds 0.27 g/cm 3 , there is a problem in that air permeability is poor.
  • the filament constituting the spunbond nonwoven fabric according to the present specification has a strength of 3.4 g/d or more or 3.41 to 4.0 g/d according to the standard test method of KS K 0412 based on a weight per unit area of 65 ⁇ 5 g/m can have
  • a polyester having a melting point of 255 ° C. or higher as a core portion using a polyester having a melting point of 255 ° C. or higher as a core portion, and composite melt spinning a copolymer having a melting point of 160 to 230 ° C. as a sheath to obtain a core-sheath composite filament; forming a web of fibers by stacking the core-sheath composite filaments on a continuous conveyor belt; and thermally bonding the fiber web.
  • the thickness of the sheath may be adjusted by adjusting the discharge amount of the polyester melt of the core and the sheath and the number of capillaries in the nozzle.
  • the overall average fineness can also be adjusted.
  • the discharge amount and the number of capillaries of the nozzle are not particularly limited, and may be appropriately adjusted according to the size of the equipment of the spinning process.
  • the thickness of the nonwoven fabric including the core portion and the sheath portion may be 0.8 to 1.9 ⁇ m based on 0.24 mm to 0.29 mm.
  • the sheath portion may have a thickness of 0.8 to 1.9 ⁇ m or 0.8 to 1.8 ⁇ m based on the thickness of the nonwoven fabric 0.24 mm to 0.28 mm when the weight per unit area is 65 ⁇ 5 g/m 2 .
  • the filament spun in the composite spinning form is sufficiently stretched so that the spinning speed is 4,500 to 5,500 m/min using a high-pressure air stretching device, so that the core part (the first component) is formed with the thickness range of the sheath part described above. It is possible to provide a core sheathing composite filament having a fineness of 5 to 10 denier. It is possible to maintain the desired fineness and thickness of the sheath by spinning within the spinning speed range.
  • the filament fiber prepared by the above method is positioned in the form of a web on a conveyor net, then goes through a calendering process of a heated smooth roll to adjust the thickness of the nonwoven fabric, and then adheres using hot air to produce a nonwoven fabric do.
  • the thermal bonding may include a calendering step using a smooth roll, and a thermal bonding step using a hot air process.
  • the calendering step may be performed at 120 to 150 °C.
  • the thickness of the nonwoven fabric may be controlled by the calendering process. For example, in the present invention, when the weight per unit area is 65 ⁇ 5 g/m 2 , the calendering process may be performed so that the thickness of the spunbond is 0.24 mm to 0.29 mm or 0.24 mm to 0.28 mm.
  • the hot air process may be performed at 170 to 230°C.
  • first component may serve as a core
  • second component may function as an adhesive in the sheath layer.
  • the final core-sheath type spunbond nonwoven fabric may have an average fineness of 7 to 12 denier, and a tensile strength of 19 kgf/5 cm or more according to the standard test method of KS K 0521, according to the standard test method of MS 343-11 Anti-wrinkle rate of 50% or less, and air permeability according to the standard test method of ASTM D737 may have physical properties of 350ccs or more.
  • the nonwoven fabric may be used as a filter support in various fields to improve filtration performance. Specifically, it may be used as a filter support for the air purifier, a filter support for an automobile cabin, or a filter support for an HVAC air conditioner.
  • FIG. 1 is a cross-sectional view of a filament of a core-sheath-type spunbond nonwoven fabric according to an embodiment of the present invention (a: thickness of the sheath).
  • Polyethylene terephthalate having an intrinsic viscosity (IV) of 0.65 dl/g and a melting point of 255 ° C is used as the core part (first component), and adipic acid and isophthalic acid are copolymerized as the sheath part (second component) to 214 ° C.
  • Polyethylene terephthalate having a melting point of was prepared.
  • the core and sheath materials were melted using a continuous extruder at a spinning temperature of 280° C., and then the core and sheath from the spinning nozzle were so that the overall average fineness was 7 denier and the thickness of the sheath excluding the core was 0.8 ⁇ m.
  • the negative discharge amount and the number of pores in the nozzle were controlled.
  • the continuous filaments released from the capillaries were solidified with cooling air, and then stretched using a high-pressure air stretching device at a spinning speed of 5,000 m/min to prepare filament fibers.
  • the prepared filament fibers are laminated in the form of a web on a conveyor net by a conventional opening method.
  • the laminated web was subjected to a calendering process using a heated smooth roll to impart smoothness and an appropriate thickness.
  • the laminated filaments were thermally bonded at a hot air temperature of 208° C. to prepare a spunbond nonwoven fabric for a filter support having a weight per unit area of 65 g/m 2 and an apparent density of 0.25 g/cm 3 .
  • a nonwoven fabric was prepared in the same manner as in Example 1, except that the discharge amount and the number of pores in the nozzle were adjusted so that the average fineness was 9 denier and the thickness of the sheath was 1.8 ⁇ m.
  • a nonwoven fabric was prepared in the same manner as in Example 2, except that the apparent density was applied to be 0.23 g/cm 3 .
  • a nonwoven fabric was prepared in the same manner as in Example 2, except that the apparent density was applied to be 0.27 g/cm 3 .
  • a nonwoven fabric was prepared in the same manner as in Example 1, except that the discharge amount and the number of pores in the nozzle were adjusted so that the average fineness was 12 denier and the thickness of the sheath was 1.8 ⁇ m.
  • a nonwoven fabric was prepared in the same manner as in Example 1, except that the discharge amount and the number of pores in the nozzle were adjusted so that the average fineness was 5 denier and the thickness of the sheath was 0.8 ⁇ m.
  • a nonwoven fabric was prepared in the same manner as in Example 1, except that the discharge amount and the number of pores in the nozzle were adjusted so that the average fineness was 5 denier and the thickness of the sheath was 2.0 ⁇ m.
  • a nonwoven fabric was prepared in the same manner as in Example 1, except that the discharge amount and the number of pores in the nozzle were adjusted so that the average fineness was 15 denier and the thickness of the sheath was 1.8 ⁇ m.
  • a nonwoven fabric was prepared in the same manner as in Example 1, except that the discharge amount and the number of pores in the nozzle were adjusted so that the average fineness was 15 denier and the thickness of the sheath was 0.7 ⁇ m.
  • a nonwoven fabric was prepared in the same manner as in Example 2, except that the apparent density was applied to be 0.20 g/cm 3 .
  • a nonwoven fabric was prepared in the same manner as in Example 2, except that the apparent density was applied to be 0.30 g/cm 3 .
  • Example 1 De' Sheath layer Thickness ( ⁇ m) Non-woven thickness (mm) Non-woven fabric weight (g/m2) Apparent density (g/cm3)
  • Example 1 7 0.8 0.26 65 0.25
  • Example 2 9 1.8 0.26 65 0.25
  • Example 3 9 1.8 0.283 65 0.23
  • Example 4 9 1.8 0.24 65 0.27
  • Example 5 12 1.8 0.26 65 0.25 Comparative Example 1 5 0.8 0.26 65 0.25 Comparative Example 2 5 2.0 0.26 65 0.25 Comparative Example 3 15 1.8 0.26 65 0.25 Comparative Example 4 15 0.7 0.26 65 0.25 Reference Example 1 9 1.8 0.325 65 0.20 Reference Example 2 9 1.8 0.217 65 0.30
  • a standard test method according to KS K 0412 was used. Specifically, the filament was measured at a tensile speed of 200 mm/min. after applying an extra load of 500 mg using Instron's measuring equipment.
  • a standard test method according to KS K 0521 was used. Specifically, a specimen having a size of 5 cm x 20 cm in the MD and CD directions of the nonwoven fabric was prepared and measured at a tensile rate of 200 mm/min. using an Instron measuring instrument.
  • a standard test method according to ASTM D737 was used. Specifically, the air permeability was measured under the application of a 125pa pressure using an FX3300 device with respect to a nonwoven gripping area of 100 cm2.
  • a standard test method according to MS343-11 was used. Specifically, the nonwoven fabric was maintained in a mechanical bending state under a load condition of 1 kg for 5 minutes, and quantified through the opening angle recovered for 5 minutes after the load was removed. That is, the anti-wrinkle rate was measured according to Equation 1.
  • Anti-wrinkle rate (%) (open angle/180°) X 100
  • the quality index uses the Formation Tester (FMT-2) and measures the optical density (OD) and optical deviation (SD) through the transmittance and transmittance distribution of the light source per unit area. It was normalized to the optical density and expressed as an average value.
  • FMT-2 Formation Tester
  • OD optical density
  • SD optical deviation
  • the Examples of the present invention compared to the comparative examples, using a sheath-core type composite spinning method to exhibit a certain range of fineness (average fineness), and By adjusting the thickness of the constituting low-melting resin, it was confirmed that excellent physical properties such as air permeability of 350 ccs or more, tensile strength of 19 kgf/5 cm or more, and anti-wrinkle rate of 50% or less could be simultaneously satisfied. Indicating the deviated coarseness (average fineness) or the thickness of the sheath, the strength, air permeability, and anti-wrinkle rate were inferior to those of the Examples, which resulted in delamination or poor radiation.
  • Reference Examples 1 and 2 The apparent density did not satisfy the range of the present application of 0.23 to 0.27 g/cm 3 , and the strength was lowered or the air permeability was poor. In particular, in Reference Example 1, bending defects occurred due to delamination.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Multicomponent Fibers (AREA)

Abstract

Selon l'invention, l'invention concerne des tissus non-tissés filés-liés ayant une structure âme-gaine et un procédé de fabrication de ceux-ci, les tissus non-tissés filés-liés utilisant deux types de résines ayant des points de fusion différents, ayant chacune un point de fusion élevé et un point de fusion bas, de manière à ajuster la finesse moyenne et l'épaisseur d'une résine à bas point de fusion constituant une gaine par un procédé de filage composite de type âme-gaine, ce qui permet d'obtenir d'excellentes propriétés mécaniques tout en ayant une perméabilité à l'air et des propriétés anti-rides améliorées.
PCT/KR2021/019707 2020-12-29 2021-12-23 Tissus non-tissés filés-liés ayant une structure âme-gaine et procédé de fabrication de ceux-ci WO2022145874A1 (fr)

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Application Number Priority Date Filing Date Title
KR10-2020-0186037 2020-12-29
KR20200186037 2020-12-29
KR1020210185018A KR102617463B1 (ko) 2020-12-29 2021-12-22 심초형 스펀본드 부직포 및 그 제조 방법
KR10-2021-0185018 2021-12-22

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WO2022145874A1 true WO2022145874A1 (fr) 2022-07-07

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