WO2021010357A1 - Tissu non tissé filé-lié et tissu non tissé stratifié - Google Patents

Tissu non tissé filé-lié et tissu non tissé stratifié Download PDF

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Publication number
WO2021010357A1
WO2021010357A1 PCT/JP2020/027160 JP2020027160W WO2021010357A1 WO 2021010357 A1 WO2021010357 A1 WO 2021010357A1 JP 2020027160 W JP2020027160 W JP 2020027160W WO 2021010357 A1 WO2021010357 A1 WO 2021010357A1
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Prior art keywords
polymer
woven fabric
nonwoven fabric
spunbonded
long fibers
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PCT/JP2020/027160
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English (en)
Japanese (ja)
Inventor
健太郎 梶原
大士 勝田
結香 西口
義嗣 船津
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東レ株式会社
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Priority to KR1020227001064A priority Critical patent/KR20220034111A/ko
Priority to JP2020540357A priority patent/JPWO2021010357A1/ja
Publication of WO2021010357A1 publication Critical patent/WO2021010357A1/fr

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    • 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
    • D04H3/16—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 filaments produced in association with filament formation, e.g. immediately following extrusion
    • 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 spunbonded non-woven fabric which is excellent in touch and is particularly suitable for use as a sanitary material.
  • non-woven fabrics for sanitary materials such as disposable diapers and sanitary napkins are required to have excellent bulkiness and flexibility due to the texture when worn.
  • a surface member that comes into direct contact with the skin is required to be bulky.
  • a so-called air-through non-woven fabric which is obtained by forming a sheet of short fibers by carding and then self-bonding by hot air treatment, is preferably used.
  • the air-through non-woven fabric has a feature of being excellent in softness because it is excellent in bulkiness and flexibility, and is widely used, but it has a drawback that the manufacturing process is complicated and the production speed is slow.
  • spunbonded non-woven fabric is characterized by high productivity and low cost due to its manufacturing process.
  • the manufacturing process of the spunbonded nonwoven fabric is a manufacturing process in which the constituent long fibers tend to have a structure in which the constituent long fibers are oriented in the plane direction, it is difficult to obtain a spunbonded nonwoven fabric having excellent bulkiness and flexibility.
  • Patent Document 1 proposes a crimped composite fiber composed of two-component polymers having different melting temperatures of 10 ° C. or more.
  • Patent Document 2 proposes a technique in which a web composed of a two-component polymer is heated, crimped, cooled, and then fused by hot air treatment.
  • Patent Document 3 proposes a technique in which a web composed of a two-component polymer is first compacted and embossed, and then fused by hot air treatment.
  • Patent Document 1 the effect of improving the bulkiness can be obtained by crimping during spinning.
  • sufficient bulk could not be obtained in order to fix the shape by embossing by heat fusion while compressing.
  • an object of the present invention has been made in view of the above circumstances, and is a spunbond having excellent productivity and stability, and having a high level of bulkiness that is satisfactory for use as a sanitary material. It is to provide a non-woven fabric.
  • the present inventors have sufficient long fibers in the step of developing crimps and fusing long fibers with each other by adopting a specific polymer combination. Since the rigidity can be maintained, it has been found that a spunbonded non-woven fabric having high bulkiness can be obtained by a simple process as compared with the conventional manufacturing method.
  • the long fibers contain polymer A and polymer B and contain The melting temperature of the polymer B is 30 ° C. or higher higher than the melting temperature of the polymer A.
  • a spunbonded non-woven fabric having an apparent density of 0.050 g / cm 3 or less.
  • a plurality of connecting portions for connecting any two long fibers of the long fibers are provided.
  • ⁇ 6> A laminated non-woven fabric in which at least the surface layer is the spunbonded non-woven fabric according to any one of ⁇ 1> to ⁇ 5>.
  • the spunbonded non-woven fabric of the present invention is characterized by having excellent productivity and an excellent soft feeling obtained from high bulkiness, and therefore, paper diapers, sanitary napkins, etc., which are strongly required to have both high productivity and feel. It can be suitably used for sanitary materials of.
  • FIG. 1 is a cross-sectional view of an embodiment of a long fiber used in the spunbonded nonwoven fabric of the present invention.
  • the long fibers of FIG. 1 are side-by-side fibers having a dumbbell-shaped cross section.
  • the spunbonded nonwoven fabric of the present invention contains long fibers containing polymer A and polymer B, the melting temperature of polymer B is 30 ° C. or higher higher than the melting temperature of polymer A, and the apparent density of the spunbonded nonwoven fabric is 0. It is 05 g / cm 3 or less. The details will be described below.
  • thermoplastic resin examples include aromatic polyester-based polymers such as "polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate” and their copolymers, "polylactic acid, polyethylene succinate, polybutylene succinate".
  • Aliper polyester polymers such as "Nate, polybutylene succinate adipate, polyhydroxybutyrate-polyhydroxyvariate copolymer, polycaprolactone” and their copolymers, "Polymer 6, Polyamide 66, Polyamide 610, Polyamide 10, Aliper polyamide polymers such as polyamide 12, polyamide 6-12 and their copolymers, polyolefin polymers such as "polypropylene, polyethylene, polybutene, polymethylpentene” and their copolymers, ethylene units from 25 mol% Examples thereof include water-insoluble ethylene-vinyl alcohol copolymer-based polymers containing 70 mol%, polystyrene-based, polydiene-based, chlorine-based, polyolefin-based, polyester-based, polyurethane-based, polyamide-based, and fluorine-based elastomer-based polymers. At least two types can be selected from these and used as the polymer A and the polymer B.
  • the polymer A to be a low melting temperature component, it is preferable to select a polymer having a relatively low melting temperature among the above-mentioned thermoplastic resins, and a polyolefin-based polymer such as "polypropylene, polyethylene, polybutene, polymethylpentene” is used. It is preferable to use a polymer and a copolymer thereof.
  • aromatic polyester-based polymers such as "polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate” and their copolymers, "polylactic acid, polyethylene succi” It is preferable to use an aliphatic polyester polymer such as "Nate, polybutylene succinate, polybutylene succinate adipate, polyhydroxybutyrate-polyhydroxyvariate copolymer, polycaprolactone" and its copolymer.
  • the polymer B is an aromatic polyester such as "polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate". It is more preferable to use a system.
  • the melting temperature of the polymer B is 30 ° C. or more higher than the melting temperature of the polymer A.
  • the difference between the melting temperature of the polymer B and the melting temperature of the polymer A is preferably 60 ° C. or higher, more preferably 80 ° C. or higher.
  • the melting temperature of the polymer A and the melting temperature of the polymer B used in the present invention are preferably 100 ° C. or higher and 300 ° C. or lower, more preferably 120 ° C. or higher and 280 ° C. or lower. By setting the melting temperature to 100 ° C. or higher, it becomes easy to obtain heat resistance that can withstand practical use.
  • the melting temperature of the polymer A and the melting temperature of the polymer B are preferably 300 ° C. or lower, more preferably 280 ° C. or lower.
  • the melting temperature By setting the melting temperature to 300 ° C. or lower, it becomes easier to cool the threads discharged from the mouthpiece, fusion of fibers is suppressed, and the obtained spunbonded non-woven fabric has few defects.
  • the melting temperature in the present invention is the peak top of the endothermic peak measured at a heating rate of 16 ° C./min under a nitrogen atmosphere using a differential scanning calorimeter (for example, "DSCQ2000" manufactured by TA Instruments). Refers to temperature.
  • the polymers A and B include antioxidants, weather stabilizers, light stabilizers, antistatic agents, antifoaming agents, antiblocking agents, nucleating agents, pigments and the like, as long as the effects of the present invention are not impaired. Additives or other polymers can be added as needed.
  • the long fibers contained in the spunbonded nonwoven fabric of the present invention preferably contain the above-mentioned polymer A and polymer B, and are long fibers composed of the polymer A and the polymer B.
  • the polymer A and the polymer B form a region respectively, and the polymer A and the polymer B are adhered with an interface.
  • the long fibers can be selected from composite fibers in the form of side-by-side fibers, eccentric core sheath fibers and the like.
  • side-by-side fibers as the long fibers because it is easy to control the positions and amounts of both polymers.
  • dumbbell-shaped side-by-side fibers as shown in FIG. 1 because it is easy to impart fine crimps.
  • the eccentric core sheath fiber as the long fiber from the viewpoint of spinnability.
  • the difference in melt viscosity referred to in the present invention means that the shear rate is zero from the viscosity curve measured at the spinning temperature using a dynamic viscoelasticity evaluation device (for example, "Rheosol-G3000" manufactured by UBM). It means that one is 10% or more larger than the other in the viscosity extrapolated to.
  • the spunbonded non-woven fabric of the present invention has a tensile strength per unit basis weight of 0.3 (N / 5 cm) / (g / m 2 ) or more and 10.0 (N / 5 cm) / (g / m 2 ) or less. Is preferable.
  • the tensile strength per unit basis weight is 0.3 (N / 5 cm) / (g / m 2 ) or more, it can withstand the process passability when manufacturing disposable diapers and the use as a product. ..
  • the tensile strength per unit basis weight is more preferably 0.4 (N / 5 cm) / (g / m 2 ) or more, and further preferably 0.5 (N / 5 cm) / (g / m 2 ) or more.
  • the tensile strength per unit basis weight is 10.0 (N / 5 cm) / (g / m 2 ) or less
  • the tensile strength per unit basis weight is more preferably 8.0 (N / 5 cm) / (g / m 2 ) or less, and further preferably 6.0 (N / 5 cm) / (g / m 2 ) or less.
  • the tensile strength per unit basis weight can be controlled by the above-mentioned thermoplastic resin, additives, fiber diameter, and / or the spinning speed, basis weight, apparent density, and bonding method described later.
  • the tensile strength per unit of the spunbonded non-woven fabric in the present invention is "6.3. Tensile strength and elongation (ISO method)" of JIS L1913: 2010 "General non-woven fabric test method", "6.3.1 Standard time”. In a tensile test with a gripping interval of at least 5 cm, the average tensile strength (strength when the sample broke) in two orthogonal directions was divided by the scale measured by the method described later. The value.
  • the spunbonded nonwoven fabric of the present invention preferably has a thickness of 0.05 mm or more and 1.50 mm or less.
  • the spunbonded non-woven fabric has an appropriate cushioning property.
  • the thickness is more preferably 0.07 mm or more, still more preferably 0.09 mm or more.
  • the spunbonded non-woven fabric has excellent bending flexibility.
  • the thickness is more preferably 0.14 mm or less, still more preferably 0.13 mm or less.
  • the thickness of the spunbonded nonwoven fabric in the present invention is not particularly limited, but refers to, for example, the thickness under no load measured by a shape measuring machine (for example, "VR3050" manufactured by KEYENCE CORPORATION).
  • the spunbonded nonwoven fabric of the present invention preferably has a basis weight of 10 g / m 2 or more and 100 g / m 2 or less.
  • the spunbonded nonwoven fabric When the basis weight of the spunbonded nonwoven fabric is 10 g / m 2 or more, the spunbonded nonwoven fabric can be easily made into a thickness suitable for sanitary material use, and can be a spunbonded nonwoven fabric having mechanical strength that can be put into practical use.
  • the basis weight of the spunbonded non-woven fabric is 100 g / m 2 or less, the spunbonded non-woven fabric having excellent breathability and flexibility can be obtained.
  • the basis weight of the spunbonded non-woven fabric is more preferably 80 g / m 2 or less, still more preferably 60 g / m 2 or less.
  • the texture (g / m 2 ) of the spunbonded non-woven fabric in the present invention is based on "6.2 Mass per unit area" of JIS L1913: 2010, and a 20 cm ⁇ 25 cm test piece is used per 1 m of sample width. Three sheets are collected, each mass (g) in the standard state is weighed, and the mass per 1 m 2 calculated from the average value is used.
  • the spunbonded nonwoven fabric of the present invention has an apparent density of 0.050 g / cm 3 or less.
  • the apparent density of the spunbonded non-woven fabric is 0.050 g / cm 3 or less, it is easy to obtain the spunbonded non-woven fabric having excellent breathability and flexibility, and it is easy to feel the high bulkiness.
  • the apparent density of the spunbonded non-woven fabric is preferably 0.045 g / cm 3 or less, more preferably 0.040 g / cm 3 or less.
  • the lower limit of the apparent density of the spunbonded non-woven fabric is not particularly limited, but for example, when it is 0.01 g / cm 3 or more, it is easy to obtain morphological stability that can be put into practical use.
  • the apparent density of the spunbonded nonwoven fabric in the present invention is a value obtained by dividing the basis weight by the thickness.
  • the spunbonded nonwoven fabric of the present invention has a plurality of connecting portions for connecting any two long fibers of the long fibers, and at least one of the connecting portions contains the polymer A, resulting in high morphological stability. It is preferable because it can be obtained.
  • the state in which the connecting portion contains the polymer A means a state in which a certain long fiber and a long fiber adjacent thereto are partially fused by the polymer A, and the long fibers are continuously fused to each other. It refers to a state in which there is substantially no portion that is fused to form a film having a certain width.
  • the shape of the spinneret and ejector used various shapes such as a round shape and a rectangular shape can be adopted. Among them, it is preferable to use a combination of a rectangular base and a rectangular ejector from the viewpoint that the amount of compressed air used is relatively small and the yarns are less likely to be fused or scratched.
  • polymer A and polymer B are melted and weighed in different extruders and supplied to a side-by-side or eccentric core-sheath type composite spinneret to supply long fibers.
  • the polymer A which is a low melting temperature component, is exposed on the surface, it is preferable because the long fibers are easily bonded to each other in the heat bonding step described later.
  • the spinning temperature is preferably (melting temperature of the raw material thermoplastic resin + 10 ° C.) or more (melting temperature of the raw material thermoplastic resin + 100 ° C.) or less. This is because by setting the spinning temperature within the above range, a stable molten state can be obtained and excellent spinning stability can be obtained.
  • the spun long fiber yarn is cooled next, and as a method of cooling the spun yarn, for example, a method of forcibly blowing cold air onto the yarn, an atmospheric temperature around the yarn, etc.
  • a method of naturally cooling the yarn, a method of adjusting the distance between the spinneret and the ejector, and the like, or a method in which these methods are combined can be adopted. Further, the cooling conditions can be appropriately adjusted in consideration of the discharge amount per single hole of the spinneret, the spinning temperature, the atmospheric temperature and the like.
  • the cooled and solidified yarn is towed and stretched by the compressed air injected from the ejector.
  • the spinning speed is preferably 2000 m / min or more, more preferably 3000 m / min or more, and further preferably 4000 m / min or more.
  • the obtained long fibers are collected on a moving net and made into a non-woven fiber web.
  • the fibers are drawn at a high spinning speed, the fibers emitted from the ejector are collected in the net in a state controlled by a high-speed air flow, and the fibers are less entangled and highly uniform non-woven fibers. You can get the web.
  • Such a non-woven fiber web can be made into a spunbonded non-woven fabric by using only one non-woven fiber web, but a plurality of spinning facilities are arranged in the process direction and a plurality of webs are stacked to obtain a spunbonded non-woven fabric. This is also a preferable embodiment in that the productivity can be increased.
  • non-woven fiber web the raw materials and process conditions can be changed for each non-woven fiber web.
  • laminated nonwoven fabric it is also one of the preferable embodiments to laminate layers of the melt blow nonwoven fabric.
  • these laminates are also collectively referred to as "non-woven fiber web”.
  • the intended non-woven fabric or laminated non-woven fabric can be obtained by integrating the obtained non-woven fiber webs by heat bonding.
  • Examples of the method of integrating the non-woven fiber webs by heat bonding include a method of heat bonding with heated air, a method of heat bonding with a roll, and the like.
  • the rolls used for heat bonding include a heat embossed roll with engraving (unevenness) on the upper and lower roll surfaces, one roll with a flat (smooth) roll surface, and engraving (unevenness) on the roll surface.
  • a thermal embossing roll composed of a combination with the other roll
  • a thermal calendar roll composed of a combination of a pair of upper and lower flat (smooth) rolls.
  • a method of heat-bonding with heated air without pressurization by the roll is preferable.
  • the laminated nonwoven fabric of the present invention has at least a surface layer of the spunbonded nonwoven fabric of the present invention.
  • the laminated non-woven fabric of the present invention is preferably a laminated non-woven fabric in which the spunbonded non-woven fabric of the present invention is used as a surface layer and melt-blown non-woven fabric is laminated as an inner layer.
  • the spunbonded non-woven fabric of the present invention is used as a surface layer and melt-blown non-woven fabric is laminated as an inner layer.
  • the spunbonded non-woven fabric layer (S) is arranged on the surface layer and the melt-blown non-woven fabric layer (M) is arranged on the inner layer.
  • S spunbonded non-woven fabric layer
  • M melt-blown non-woven fabric layer
  • the basis weight of the laminated non-woven fabric of the present invention is preferably 10 g / m 2 or more and 100 g / m 2 or less.
  • the basis weight of the laminated nonwoven fabric is more preferably 13 g / m 2 or more, still more preferably 15 g / m 2 or more.
  • the basis weight of the laminated non-woven fabric is more preferably 50 g / m 2 or less, still more preferably 35 g / m 2 or less.
  • the texture (g / m 2 ) of the laminated non-woven fabric in the present invention is based on "6.2 Mass per unit area" of JIS L1913: 2010, and a test piece of 20 cm x 25 cm is used as a sample width of 3 per 1 m. Sheets are taken, each mass (g) in the standard state is weighed, and the mass per 1 m 2 calculated from the average value is used.
  • the spunbonded non-woven fabric and the laminated non-woven fabric of the present invention are characterized by having excellent productivity and an excellent soft feeling obtained from high bulkiness, and therefore, paper diapers that are strongly required to have both high productivity and touch comfort. It can be suitably used for sanitary materials such as sanitary napkins and sanitary napkins.
  • the soft feeling referred to in the present invention is a feeling of touch that is smooth when the surface is patted and that an appropriate elasticity is felt in the thickness direction.
  • the present invention will be specifically described based on Examples. However, the present invention is not limited to these examples. In addition, in the measurement of each physical property, if there is no particular description, the measurement is performed based on the above method. However, the present invention is not limited to the description of these examples.
  • Example 1 Polyethylene (PE) as polymer A and polyethylene terephthalate (PET) as polymer B were melted by an extruder and molded into side-by-side composite fibers (mass ratio 1: 1) at a spinning temperature of 290 ° C. A single-hole discharge rate of 0.6 g / min was spun from a rectangular base having a hole having a hole diameter of 0.30 mm.
  • PE polyethylene
  • PET polyethylene terephthalate
  • the spun yarn was cooled and solidified, and then towed and stretched by compressed air having a pressure at the ejector of 0.10 MPa in a rectangular ejector, and collected on a moving net to obtain long fibers. Subsequently, the obtained long fibers were heated with hot air at 150 ° C. and heat-bonded to obtain a spunbonded nonwoven fabric having a basis weight of 20 g / m 2 .
  • Example 2 A spunbonded nonwoven fabric was obtained in the same manner as in Example 1 except that the eccentric core sheath type composite fiber was molded instead of molding the side-by-side type composite fiber.
  • Example 3 A spunbonded non-woven fabric was obtained in the same manner as in Example 1 except that the spinning was carried out under the following conditions.
  • Hole shape in the rectangular base Circles arranged on both sides of the rectangle Diameter of circles arranged on both sides of the rectangle ⁇ : 0.30 mm Center distance between two circles placed on both sides of the rectangle: 0.8 mm
  • Single hole discharge rate 0.6 g / min
  • the spun yarn was cooled and solidified, and then towed and stretched by compressed air having a pressure at the ejector of 0.10 MPa in a rectangular ejector, and collected on a moving net to obtain long fibers. Subsequently, the obtained long fibers are heat-bonded (linear pressure: 50 N / cm, heat-bonding temperature: 130 ° C.) with a pair of upper and lower thermal embossing rolls composed of an upper roll and a lower roll, and have a basis weight of 20 g / m 2 . A spunbonded non-woven fabric was obtained.
  • an embossed roll made of metal and having a polka dot pattern engraved at a depth of 0.5 mm was used with an adhesive area ratio of 16%.
  • a metal flat roll was used as the lower roll.
  • Comparative Example 2 Copolymerized PP as polymer A and PP as polymer B are melted by an extruder and formed into side-by-side composite fibers (mass ratio 1: 1) at a spinning temperature of 230 ° C., and the pore diameter ⁇ is 0.
  • a spunbonded non-woven fabric was obtained in the same manner as in Comparative Example 1 except that a single-hole discharge rate of 0.6 g / min was spun from a rectangular base having a hole of .30 mm.
  • Comparative Example 3 A spunbonded nonwoven fabric was obtained in the same manner as in Comparative Example 2 except that PE was used as the polymer A.
  • Comparative Example 4 A spunbonded nonwoven fabric was obtained in the same manner as in Comparative Example 1 except that the obtained long fibers were heated with hot air at 150 ° C. and heat-bonded.
  • the spunbonded non-woven fabrics of Examples 1 to 3 had a sensory evaluation result of 4.0 to 5.0, which was an excellent result of a soft feeling. Therefore, it was found that the spunbonded nonwoven fabrics of Examples 1 to 3 have a high level of bulkiness that is satisfactory for use as a sanitary material.
  • spunbonded non-woven fabrics of Examples 1 to 3 are superior in productivity as compared with the air-through non-woven fabric. Further, the spunbonded nonwoven fabrics of Examples 1 to 3 are fused and have a high level of bulkiness, and thus are excellent in morphological stability.
  • Comparative Examples 1 to 4 showed that the sensory evaluation result was 2.0 or less, which was inferior to the soft feeling.
  • a polymer B polymer

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Abstract

La présente invention concerne un tissu non tissé filé-lié qui contient une fibre longue. La fibre longue contient un polymère A et un polymère B. La température de fusion du polymère B est supérieure à la température de fusion du polymère A d'au moins 30 °C. La masse volumique apparente du tissu non tissé filé-lié est de 0,050 g/cm3 ou moins.
PCT/JP2020/027160 2019-07-16 2020-07-10 Tissu non tissé filé-lié et tissu non tissé stratifié WO2021010357A1 (fr)

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KR1020227001064A KR20220034111A (ko) 2019-07-16 2020-07-10 스펀본드 부직포 및 적층 부직포
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JP7439997B1 (ja) 2022-09-27 2024-02-28 東レ株式会社 長繊維不織布およびその製造方法ならびに衛生材料
WO2024070158A1 (fr) * 2022-09-27 2024-04-04 東レ株式会社 Tissu non tissé à fibres longues, son procédé de fabrication et matériau sanitaire

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JP2019094584A (ja) * 2017-11-21 2019-06-20 東レ株式会社 不織布

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JP7439997B1 (ja) 2022-09-27 2024-02-28 東レ株式会社 長繊維不織布およびその製造方法ならびに衛生材料
WO2024070158A1 (fr) * 2022-09-27 2024-04-04 東レ株式会社 Tissu non tissé à fibres longues, son procédé de fabrication et matériau sanitaire

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