WO2019203484A1 - Tissu non tissé de fibre composite frisée et stratifié correspondant, et article comprenant le stratifié - Google Patents

Tissu non tissé de fibre composite frisée et stratifié correspondant, et article comprenant le stratifié Download PDF

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Publication number
WO2019203484A1
WO2019203484A1 PCT/KR2019/004037 KR2019004037W WO2019203484A1 WO 2019203484 A1 WO2019203484 A1 WO 2019203484A1 KR 2019004037 W KR2019004037 W KR 2019004037W WO 2019203484 A1 WO2019203484 A1 WO 2019203484A1
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WIPO (PCT)
Prior art keywords
woven fabric
propylene
composite fiber
based polymer
laminate
Prior art date
Application number
PCT/KR2019/004037
Other languages
English (en)
Inventor
Jin Il Jung
Yeong Seok Seo
Dae Hee Kim
Joong Kwon AHN
Original Assignee
Toray Advanced Materials Korea Inc.
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Filing date
Publication date
Application filed by Toray Advanced Materials Korea Inc. filed Critical Toray Advanced Materials Korea Inc.
Priority to CN201980026780.8A priority Critical patent/CN112074632A/zh
Priority to JP2020558439A priority patent/JP7221987B2/ja
Publication of WO2019203484A1 publication Critical patent/WO2019203484A1/fr

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    • D—TEXTILES; PAPER
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    • 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
    • D04H1/4391—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 characterised by the shape of the fibres
    • D04H1/43918—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 characterised by the shape of the fibres nonlinear fibres, e.g. crimped or coiled fibres
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
    • B32B2264/108—Carbon, e.g. graphite particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/12—Mixture of at least two particles made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/728—Hydrophilic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00—Personal care
    • B32B2555/02—Diapers or napkins

Definitions

  • One or more embodiments relate to a non-woven fabric of a crimped composite fiber and a laminate thereof, and an article including the laminate, and more particularly, to a non-woven fabric of a crimped composite fiber, having improved softness and bulkiness, and a laminate thereof, and an article including the laminate.
  • Final physical properties of a non-woven fabric are determined according to a web forming method and a binding method.
  • webs are formed by single spinning or core-in-sheath composite spinning.
  • the webs formed in this way have a simple structure with no crimps, and are bound to each other by a heating calender to form a thin non-woven fabric.
  • the thin non-woven fabric is used as a top sheet and a back sheet during the production of a diaper.
  • this thin non-woven fabric has remarkably low softness as compared with a short-fiber air-through non-woven fabric obtained by forming webs through carding and binding the webs through hot air, and thus the softness of the thin non-woven fabric deteriorates.
  • One or more embodiments provide a non-woven fabric of a crimped composite fiber, having improved softness and bulkiness.
  • One or more embodiments provide a non-woven fabric laminate including two or more non-woven fabrics of a crimped composite fiber.
  • One or more embodiments provide an article including the non-woven fabric laminate.
  • a non-woven fabric of a crimped composite fiber includes: a first propylene-based polymer and a second propylene-based polymer, wherein, in the first propylene-based polymer and the second propylene-based polymer, a melting point of the first propylene-based polymer is higher than a melting point of the second propylene-based polymer by 30 °C or more, the melting points being measured by differential scanning calorimetry (DSC), a ratio (second polymer / first polymer) of melt flow rates (MFR: measurement temperature 230 °C, load 2.16 kg) of the first propylene-based polymer and the second propylene-based polymer is 1.7 or more, the melt flow rates being measured according to ASTM D1238, and a component ratio represented by a weight ratio of the first propylene-based polymer / the second propylene-based polymer is 50/50 to 10/90.
  • DSC differential scanning calorimetry
  • MFR measurement temperature 230 °C, load
  • the first propylene-based polymer and the second propylene-based polymer may each independently include a propylene homopolymer, a propylene-ethylene copolymer, an elastomeric random copolymer in which ethylene is copolymerized with polypropylene, a propylene-ethylene-butylene terpolymer, or a combination thereof.
  • the non-woven fabric may further include a fatty acid amide of 5 to 25 carbon atoms in an amount of about 0.01 wt% to about 3 wt% based on a total weight of the non-woven fabric.
  • the non-woven fabric may include an embossing portion and a non-embossing portion, and the embossing portion may be an open embossing portion and include a plurality of unit embossing pattern portions arranged successively at the same or different intervals.
  • Each of the unit embossing pattern portions has the following form:
  • Each embossing pattern included in each of the unit embossing pattern portions may have an area of about 0.2 mm 2 to about 0.7 mm 2 .
  • the non-woven fabric may have a bonding rate of 13 % or less.
  • the crimped composite fiber may be a mono-type composite fiber, a core-in-sheath-type composite fiber, a side-by-side-type composite fiber, or a sandwich-type composite fiber.
  • the non-woven fabric may be a spunbonded non-woven fabric.
  • a non-woven fabric laminate has at least two layers, wherein at least one layer of the laminate is the non-woven fabric of a crimped composite fiber.
  • the non-woven fabric may be a spunbonded non-woven fabric, and the non-woven fabric laminate may be formed by laminating the four spunbonded non-woven fabrics and have a uniformity (CV) of 3 % or less.
  • CV uniformity
  • the non-woven fabric laminate may have a thickness of 0.02 mm or more, a crimp number of 10 EA/10 mm or more, and a bonding rate of 13 % or less, and may have a machine direction (MD) stiffness of 50 mm or less in a bonding region of each embossing pattern.
  • MD machine direction
  • an article includes the non-woven fabric laminate.
  • the article may be a diaper, an absorbent article, a defecation article, a support layer, or a top sheet.
  • the non-woven fabric laminate may have a hydrophilic agent impregnation amount (OPU) of 0.7 % or less, and thus the article may have a water absorption speed of 3 sec or less when the non-woven fabric laminate is applied to a top sheet layer of the diaper.
  • OPU hydrophilic agent impregnation amount
  • the shape of the crimp is clear and the shape stability of the crimp is good, so that softness and bulkiness can be improved.
  • a diaper including the non-woven fabric of a crimped composite fiber cannot hurt a wearer's skin or cannot cause rash.
  • FIG. 1 is a partial view showing an embossing pattern of a nonwoven fabric of a crimped composite fiber according to an embodiment of the present disclosure
  • FIG. 2 is a cross-sectional view of a crimped composite fiber used in Examples and Comparative Examples.
  • FIG. 3 is a partial view showing an embossing pattern of a nonwoven fabric of a crimped composite fiber, prepared in Example 4.
  • composite fiber The non-woven fabric of a crimped composite fiber (hereinafter, simply referred to as "composite fiber) according to an embodiment includes a first propylene-based polymer and a second propylene-based polymer.
  • a melting point of the first propylene-based polymer is higher than a melting point of the second propylene-based polymer by 30 °C or more, the melting points being measured by differential scanning calorimetry (DSC), (ii) a ratio (second polymer / first polymer) of melt flow rates (MFR: measurement temperature 230 °C, load 2.16 kg) of the first propylene-based polymer and the second propylene-based polymer is 1.7 or more, the melt flow rates being measured according to ASTM D1238, and (iii) a component ratio represented by a weight ratio of the first propylene-based polymer / the second propylene-based polymer is 50/50 to 10/90.
  • the melting point of the first propylene-based polymer may be higher than the melting point of the second propylene-based polymer by about 30 °C to about 60 °C or about 30 °C to about 100 °C.
  • the ratio (second polymer / first polymer) of melt flow rates may be about 1.7 to about 2.0, about 1.7 to about 3.0, or about 1.7 to about 4.0.
  • the composite fiber has crimpability, and thus the non-woven fabric including the composite fiber may have good softness and bulkiness.
  • the first propylene-based polymer and the second propylene-based polymer are arranged to occupy substantially respective regions in the cross-section of the composite fiber, and are successively stretched along a length direction. At least one component of the first propylene-based polymer and the second propylene-based polymer may successively form at least a part of a peripheral surface along the length direction of the composite fiber.
  • the first propylene-based polymer and the second propylene-based polymer may each independently include a propylene homopolymer, a propylene-ethylene random copolymer, an elastomeric random copolymer in which ethylene is copolymerized with polypropylene, a propylene-ethylene-butylene terpolymer, or a combination thereof.
  • the propylene-ethylene random copolymer may have an ethylene unit component content of about 10 mol% to about 30 mol% and a melt flow rate (MFR) of about 10 g/10 min to about 200 g/10 min.
  • MFR melt flow rate
  • the ethylene unit component content is determined by 13 C-NMR spectroscopy.
  • the elastomer random copolymer may be included in the first propylene-based polymer in an amount of about 10 wt% to about 30 wt%.
  • the propylene-ethylene-butylene terpolymer may be included in the first propylene-based polymer in an amount of about 10 wt% to about 30 wt%.
  • the elastomeric random copolymer and the propylene-ethylene-butylene terpolymer may be included in the first propylene-based polymer in an amount of about 10 wt% to about 30 wt%.
  • At least one component of the first propylene-based polymer and the second propylene-based polymer may include a propylene homopolymer; a copolymer in which propylene as a main structural unit component is copolymerized with at least one of ⁇ -olefins of 2 to 20 carbon atoms, for example, 2 to 8 carbon atoms, such as ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene; or a combination thereof.
  • the first propylene-based polymer may be a mixture of 70 wt% to 90 wt% of a propylene homopolymer and 10 wt% to 30 wt% of an elastomeric random copolymer or a propylene-ethylene-butylene terpolymer
  • the second propylene-based polymer may be a propylene homopolymer
  • the melting point of the first propylene-based polymer may be in a range of about 120 °C to about 175 °C, and the melting point of the second propylene-based polymer may be in a range of about 110 °C to about 155 °C.
  • the difference in melting point between the two polymers, as described above, may be in a range of 30 °C or more, about 30 °C to about 60 °C, or about 30 °C to about 100 °C.
  • the aforementioned propylene-based polymers may be prepared using a high stereoregular polymerization catalyst.
  • the high stereoregular polymerization catalyst may include a diester-based catalyst, a succinate-based catalyst, a metallocene catalyst, or a combination thereof.
  • the non-woven fabric including the composite fiber may be obtained by a general composite melt spinning method without using a special apparatus.
  • the non-woven fabric may be a spunbonded non-woven fabric prepared by a spunbonding method exhibiting high productivity.
  • the first propylene-based polymer forming one region of the composite fiber and the second propylene-based polymer forming the other region of the composite fiber are separately melted by two extruders or the like, and each melt is discharged from a spinneret having a composite spinning nozzle configured to form and discharge a desired fiber structure to discharge a composite long fiber.
  • the discharged long fiber is cooled by cooling air, a tensile force is applied to the cooled long fiber by air for stretching to allow the long fiber to have a predetermined fineness, and the stretched long fiber is directly collected on a collecting belt and deposited to a predetermined thickness.
  • post-processing as entangling processing, is performed by a method using a needle punch, a water jet, an ultrasonic wave or the like; an embossing processing using a heating embossing roll; or a thermal fusion method using hot ventilating air.
  • the non-woven fabric may be formed by thermal fusion using embossing processing.
  • the embossing processing may be performed under conditions of a bonding rate (that is, embossing area ratio) of 13 % or less and a non-embossing unit area of 0.2 mm 2 or more, for example, about 0.2 mm 2 to about 0.7 mm 2 .
  • the non-embossing unit area refers to a maximum area of a rectangle in contact with the inner side of an embossing portion in a smallest unit of non-embossing portion whose all sides are surrounded by the embossing portion.
  • the bonding rate and the non-embossing unit area may be adjusted by changing an embossing pattern.
  • the non-woven fabric may include an embossing portion and a non-embossing portion, and the embossing portion may be an open embossing portion and include a plurality of unit embossing pattern portions arranged successively at the same or different intervals.
  • Each of the unit embossing pattern portions may have a shape below:
  • the fineness and basic weight of the non-woven fabric may be appropriately selected depending on use.
  • the fineness of the non-woven fabric may be about 1.0 denier to about 2.5 deniers, for example, about 0.7 deniers to about 2.0 deniers
  • the basic weight of the non-woven fabric may be about 15 g/m 2 to about 100 g/m 2 , for example, about 7 g/m 2 to about 30 g/m 2 .
  • Each embossing pattern included in each of the unit embossing pattern portions may have an area of about 0.2 mm 2 to about 0.7 mm 2 .
  • the non-woven fabric further includes fatty acid amide of 5 to 25 carbon atoms in an amount of about 0.01 wt% to about 3 wt% based on a total weight of the non-woven fabric.
  • the fatty acid amide may serve as a slip agent.
  • the fatty acid amide may include oleic amide, erucamide, stearic acid amide, or a combination thereof.
  • the composite fiber may include, in addition to the first propylene-based polymer and the second propylene-based polymer, other components as necessary as long as an object of the present disclosure is not impaired.
  • other components may include a heat stabilizer, a weather stabilizer, various stabilizers, an antistatic agent, an anti-blocking agent, an anticlouding agent, a filler, a dye, a pigment, natural oil, synthetic oil, wax, and combinations thereof.
  • the stabilizer may include an anti-aging agent such as 2,6-di-t-butyl-4-methylphenol (BHT); a phenolic antioxidant such as tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane, b-(3,5-di-t-butyl-4-hydroxyphenyl) propionic acid alkyl ester, or 2,2'-oxamidobis [ethyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate; a fatty acid metal salt such as zinc stearate, calcium stearate, or calcium 1,2-hydroxystearate; a polyhydric alcohol fatty acid ester such as glycerin monostearate, glycerin distearate, pentaerythritol monostearate, pentaerythritol distearate, or pentaerythritol tristearate
  • the filler may include silica, diatomite, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, talc, clay, mica, asbestos, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, molybdenum sulfide, or a combination thereof.
  • the aforementioned propylene-based polymer and the aforementioned other components to be used as needed may be mixed by a known method.
  • the composite fiber may be a mono-type composite fiber, a core-in-sheath type composite fiber, a side-by-side type composite fiber, or a sandwich type composite fiber.
  • the non-woven fabric laminate according to an embodiment of the present disclosure may be a laminate having at least two layers.
  • at least one layer of the laminate may be the aforementioned non-woven fabric.
  • the non-woven fabric laminate may include a spunbonded non-woven fabric among the aforementioned non-woven fabrics.
  • the non-woven fabric laminate may be formed by laminating the four spunbonded non-woven fabrics.
  • the non-woven fabric laminate may have a uniformity (CV) of 3 % or less.
  • uniformity (CV%) refers to a percentage of a value obtained by dividing a weight deviation of 30 test specimens by an average weight of the 30 test specimens after the non-woven fabric laminate is cut to a size of 1 m 2 to make the 30 test specimens.
  • the non-woven fabric laminate formed by laminating the four spunbonded non-woven fabrics may have a thickness of 0.02 mm or more, a crimp number of 10 EA/10 mm or more, and a bonding rate of 13 % or less, and may have a machine direction (MD) stiffness of 40 mm or less, which indicates softness of the non-woven fabric laminate.
  • MD stiffness refers to flexural deformation of the non-woven fabric laminate in a machine direction (that is, degree of warpage of the non-woven fabric laminate).
  • the article according to an embodiment of the present disclosure includes the aforementioned non-woven fabric laminate.
  • the article may be a diaper, an absorbent article, a defecation article, a support layer, or a top sheet.
  • the non-woven fabric laminate When the article is a diaper, the non-woven fabric laminate has a hydrophilic agent impregnation amount (OPU: Oil Pick-Up) of 0.7 % or less, and thus the article may have a water absorption speed of 3 sec or less when the non-woven fabric laminate is applied to a top sheet layer of the diaper.
  • OPU Oil Pick-Up
  • hydrophilic agent impregnation amount may be calculated according to Equation 1 below.
  • OPU(%) (W1-W0)/W0 X 100
  • W0 is a weight of the non-woven fabric laminate including no hydrophilic agent
  • W1 is a weight of the nonwoven fabric laminate including the hydrophilic agent.
  • the hydrophilic agent is used as a form of a water suspension of polydimethylsiloxane having a concentration of 15 wt%.
  • the weight of hydrophilic agent included in the nonwoven fabric laminate only refers to the weight of the solid component.
  • a first propylene-based polymer (A) in which an erucamide slip agent is contained, and a second propylene-based polymer (B) in which an erucamide slip agent is contained were subjected to composite melt spinning by a spunbonding method to deposit a side-by-side type composite fiber having the structure of FIG. 2 on a collecting surface, and the composite fiber was subjected to embossing processing by the embossing pattern shown in FIG. 1 by using a calender roll whose upper portion was heated to 146 °C and whose lower portion was heated to 144 °C, so as to produce a non-woven fabric including a crimped composite fiber.
  • the types, physical properties and content ratio of the first propylene-based polymer (A) and the second propylene-based polymer (B), the amount of the erucamide slip agent, and the characteristics of the embossing pattern are given in Table 1 below.
  • MFR refers to a melt index measured under the conditions of a temperature of 230 °C and a load of 2.16 kg according to ASTM D1238, and the amount of the slip agent refers to a weight with respect to the total weight of the non-woven fabric.
  • PA1 to PA7 and PB are as follows.
  • PA1 a mixture of 70 wt% of a propylene homopolymer (H7700, manufactured by LG Chem.) and 30 wt% of an elastomeric random copolymer (T-7700, manufactured by LG Chem.) in which ethylene is copolymerized with polypropylene
  • PA2 a mixture of 60 wt% of a propylene homopolymer (H7700, manufactured by LG Chem.) and 40 wt% of an elastomeric random copolymer (VISTAMAXX 7020, manufactured by EXXON) in which ethylene is copolymerized with polypropylene
  • PA3 a mixture of 40 wt% of a propylene homopolymer (H7700, manufactured by LG Chem.) and 60 wt% of an elastomeric random copolymer (VERSIFY 4200, manufactured by DOW) in which ethylene is copolymerized with polypropylene
  • PA4 a mixture of 70 wt% of a propylene homopolymer (H7700, manufactured by LG Chem.) and 30 wt% of an elastomeric random copolymer (T-7700, manufactured by LG Chem.) in which ethylene is copolymerized with polypropylene
  • PA5 a mixture of 70 wt% of a propylene homopolymer (MH7700, manufactured by LG Chem.) and 30 wt% of an elastomeric random copolymer (T-7700, manufactured by LG Chem.) in which ethylene is copolymerized with polypropylene
  • PA6 a mixture of 60 wt% of a propylene homopolymer (MH7700, manufactured by LG Chem.) and 40 wt% of an elastomeric random copolymer (T-7700, manufactured by LG Chem.) in which ethylene is copolymerized with polypropylene
  • PA7 a mixture of 70 wt% of a propylene homopolymer (H7700, manufactured by LG Chem.) and 30 wt% of an elastomeric random copolymer (T-7700, manufactured by LG Chem.) in which ethylene is copolymerized with polypropylene
  • PB a propylene homopolymer (H562T, manufactured by PMC)
  • Weight per unit area was measured according to ASTM D 3776-1985.
  • Tensile strength a maximum tensile load was obtained by performing a tensile test using a tensile strength measuring apparatus (Instron) according to KSK 0520 under the conditions of a test specimen width of 5 cm, an interval between test specimens of 10 cm, and a tensile speed of 500 mm/min.
  • Thickness (mm) was measured according to KSK 0506.
  • Crimp number the number of filament crimps in a range of 10 mm was directly measured using a microscope.
  • each of the non-woven fabrics of a crimped composite fiber prepared in Examples 1 to 6 is thick, has a larger number of crimps, and has good or similar other physical properties such as tensile strength (MD: Machine direction), tensile strength (CD: Cross direction), tensile elongation (MD: Machine direction), tensile elongation (CD: Cross direction), and spinnability, as compared with each of the non-woven fabrics prepared in Comparative Examples 1 to 5.
  • FIG. 3 is a partial view showing an embossing pattern of the nonwoven fabric of a crimped composite fiber, prepared in Example 4.
  • the nonwoven fabric of a crimped composite fiber, prepared in Example 4 has a crimp number of about 20/10mm.
  • Evaluation Example 2 Evaluation of physical properties of non-woven fabric laminate including spunbonded non-woven fabrics
  • the spunbonded nonwoven fabrics prepared in Examples 1 to 6 and Comparative Examples 1 to 5 were laminated by four to produce nonwoven fabric laminates. Then, the physical properties of each of the nonwoven fabric laminates were evaluated by the following method, and the results thereof are given in Table 3 below.
  • Crimp number the number of filament crimps in a range of 10 mm was directly measured using a microscope.
  • Bonding rate (%) refers to a percentage of a portion where heat is transferred to bond the non-woven fabric, as a relief portion of an embossing pattern.
  • MD stiffness a bending distance when a nonwoven fabric laminate sample was brought into contact with an inclined surface was measured by a tester machine having an inclination of 45°. The smaller the MD stiffness, the better the flexibility.
  • OPU Olet Pick Up
  • each of the non-woven fabric laminates produced by laminating the four non-woven fabrics of a crimped composite fiber prepared in Examples 1 to 6 has a good uniformity of 3 % or less, is thick, has a large number of crimps, has a small MD stiffness, has a similar OPU, and has a fast water absorption speed, as compared with each of the non-woven fabric laminates produced by laminating the four non-woven fabrics of a crimped composite fiber prepared in Comparative Examples 1 to 5.
  • the shape of the crimp is clear and the shape stability of the crimp is good, so that softness and bulkiness can be improved.
  • a diaper including the non-woven fabric of a crimped composite fiber cannot hurt a wearer's skin or cannot cause rash.

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  • Engineering & Computer Science (AREA)
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  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
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  • General Health & Medical Sciences (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
  • Multicomponent Fibers (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'invention concerne un tissu non tissé d'une fibre composite frisée comprenant : un premier polymère à base de propylène et un second polymère à base de propylène. Dans le premier polymère à base de propylène et le second polymère à base de propylène, un point de fusion du premier polymère à base de propylène est supérieur au point de fusion du second polymère à base de propylène de 30 °C ou plus, un rapport (second polymère/premier polymère) des indices de fluidité à chaud (MFR : température de mesure 230 °C, charge 2,16 kg) du premier polymère à base de propylène et du second polymère à base de propylène est de 1,7 ou plus, et un rapport des constituants représenté par un rapport en poids du premier polymère à base de propylène/second polymère à base de propylène est compris entre 50/50 et 10/90.
PCT/KR2019/004037 2018-04-17 2019-04-05 Tissu non tissé de fibre composite frisée et stratifié correspondant, et article comprenant le stratifié WO2019203484A1 (fr)

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JP2020558439A JP7221987B2 (ja) 2018-04-17 2019-04-05 捲縮型複合纎維の不織布及びその積層体、並びにその物品

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Cited By (2)

* Cited by examiner, † Cited by third party
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EP3715517A1 (fr) * 2019-03-26 2020-09-30 Reifenhäuser GmbH & Co. KG Maschinenfabrik Procédé de fabrication d'un stratifié non-tissé et stratifié non-tissé
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CN112074632A (zh) 2020-12-11
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