WO2018190342A1 - ニードルパンチ不織布の製造方法 - Google Patents
ニードルパンチ不織布の製造方法 Download PDFInfo
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- WO2018190342A1 WO2018190342A1 PCT/JP2018/015104 JP2018015104W WO2018190342A1 WO 2018190342 A1 WO2018190342 A1 WO 2018190342A1 JP 2018015104 W JP2018015104 W JP 2018015104W WO 2018190342 A1 WO2018190342 A1 WO 2018190342A1
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- sheath
- nonwoven fabric
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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
- 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
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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
- 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
- D04H1/43825—Composite fibres
- D04H1/43828—Composite fibres sheath-core
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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
- 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
- D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
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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
- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
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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
- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
- D04H1/485—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with weld-bonding
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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
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
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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
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
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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
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
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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
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
- A47L13/16—Cloths; Pads; Sponges
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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
- 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
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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
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/559—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 by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
Definitions
- the present invention relates to a method for producing a needle punched nonwoven fabric excellent in thermoformability.
- a nonwoven fabric is obtained by embossing or needle punching a fiber web obtained by accumulating core-sheath composite fibers (Patent Document 1).
- a core-sheath-type composite continuous fiber consisting of a high-melting polyester as a core component and a low-melting point polyester copolymer as a sheath component is accumulated to form a fiber web
- the nonwoven fabric is partially thermocompression bonded by an embossing roll.
- polyethylene terephthalate obtained by co-condensation of ethylene glycol and terephthalic acid is used as the high melting point polyester.
- the low-melting point polyester copolymer a polyester copolymer obtained by co-condensation of ethylene glycol, terephthalic acid and isophthalic acid is used.
- the present invention provides a method for producing a needle punched nonwoven fabric that, when embossed, provides a sharp uneven pattern that is less likely to fluff. Moreover, the manufacturing method of the needle punch nonwoven fabric which can be thermoformed into a predetermined shape on the heating and pressurization conditions of a comparatively wide range is provided.
- the present invention is a core-sheath type in which the core component is composed of a copolymer composed of ethylene glycol and terephthalic acid, and the sheath component is composed of a copolymer composed of ethylene glycol, adipic acid, terephthalic acid, isophthalic acid and / or diethylene glycol.
- the present invention relates to a method for producing a needle punched nonwoven fabric characterized by
- the specific core-sheath type composite fiber is a copolymer composed of a copolymer of ethylene glycol and terephthalic acid as a core component and ethylene glycol, adipic acid, terephthalic acid, isophthalic acid and / or diethylene glycol as a sheath component. It consists of coalescence.
- the copolymer constituting the core component is a polyester obtained by dehydration condensation using ethylene glycol as a diol component and terephthalic acid as a dicarboxylic acid component.
- the dicarboxylic acid component a very small amount of other dicarboxylic acid components such as isophthalic acid may be mixed.
- the melting point of the copolymer constituting the core component is about 260 ° C., and the glass transition point is about 70-80 ° C.
- the copolymer constituting the sheath component is a copolymerized polyester obtained by dehydration condensation using ethylene glycol and optionally diethylene glycol as a diol component and adipic acid, terephthalic acid and optionally isophthalic acid as a dicarboxylic acid component, respectively. At least one of diethylene glycol and isophthalic acid needs to be used, and preferably both are used.
- diethylene glycol and / or isophthalic acid are mixed in the diol component.
- the melting point and glass transition point of the copolymer constituting the sheath component are arbitrary, but the melting point is preferably about 200 ° C. in consideration of the meltability between the sheath components and moldability by heating and pressurization.
- the glass transition point is preferably about 40 to 50 ° C.
- the core component and the sheath component may be arranged concentrically or may be arranged eccentrically. However, since it will become easy to produce shrinkage at the time of heating if it is arranged eccentrically, it is more preferable to arrange it concentrically.
- the core-sheath type composite fiber is obtained by a known method in which a high melting point polyester serving as a core component and a low melting point copolymer polyester serving as a sheath component are supplied to a spinning apparatus having a composite spinning hole and melt-spun. Can do.
- the core-sheath type composite fiber may be a core-sheath type composite long fiber or a core-sheath type composite short fiber, but a needle punched nonwoven fabric with higher rigidity can be obtained by using the core-sheath type composite short fiber. It is done.
- a so-called spunbond method is generally used.
- the core-sheath type composite continuous fibers obtained by melt spinning can be immediately accumulated in a sheet form to obtain a fiber web.
- the core-sheath type composite short fibers may be opened through a card machine and accumulated in a sheet form.
- the weight of the fiber web is about 80 to 2000 g / m 2 .
- the weight of the fiber web is too low, the thickness becomes thin, and it becomes difficult to visually recognize a sharp uneven pattern when embossed.
- the weight of a fiber web is too high, the needle punch nonwoven fabric obtained will become high rigidity, and it will become difficult to thermoform.
- the fiber web may be needle punched in a state where the core-sheath composite fibers are not bonded to each other, or may be needle punched in a state where the core-sheath composite fibers are bonded to each other.
- the former method is preferable because the fibers are not bonded to each other, so that the fiber is less damaged when needle punching is performed, and the strength is not easily lowered due to yarn breakage or the like. Moreover, if it is the latter method, since it is a fiber web with the fibers bonded together, it is easy to handle and transport.
- Needle punching is performed by a known method, whereby a core-sheath composite fiber is entangled three-dimensionally, and a dense nonwoven fabric in which core-sheath composite fibers are arranged in the thickness direction is obtained. Even when the core-sheath type composite fibers are bonded to each other, this adhesion is broken by the needle punch, and the core-sheath type composite fibers are entangled three-dimensionally.
- the punch density is about 10 to 200 / cm 2 .
- the needle punched nonwoven fabric obtained in this way is heated and pressurized and thermoformed into various shapes.
- a typical example of thermoforming is hot embossing.
- the hot embossing means that a needle punched nonwoven fabric is passed between a pair of heated embossed rolls (a concave and convex roll whose surface is uneven) or between a heated embossed roll and a smooth roll. This is a method of providing a concavo-convex pattern on the surface.
- the needle punched nonwoven fabric is unbonded because the core-sheath type composite fibers are entangled with each other. , The uneven pattern becomes clear.
- the heating temperature may be such that the sheath component is softened or melted and the core-sheath composite fibers are fused together.
- the heating temperature may be below the softening point or below the melting point of the sheath component. Specifically, the heating temperature is about 80 ° C. to 180 ° C., and the pressing condition is about 10 to 150 kg / cm as the linear pressure between the rolls.
- thermoforming is a method of forming a three-dimensional shape such as a dish shape or a bowl shape. Specifically, it is molded into a three-dimensional solid shape using a press die. In this case, it is preferable to pressurize with a press die after heating the needle punched nonwoven fabric. Of course, the press die may be heated, and the needle punched nonwoven fabric may be heated and pressurized simultaneously. Even in thermoforming using a press die, the sheath-core conjugate fibers are fused together by softening or melting of the sheath component.
- the heating temperature is about 100 ° C. to 200 ° C.
- the pressing condition is about 10 to 500 kg / cm 2 in terms of surface pressure during pressing.
- thermoformed nonwoven fabric such as an embossed nonwoven fabric obtained by the method according to the present invention can be suitably used for various applications.
- filter base materials humidifier transpiration plates, sound absorbing materials (anti-noise materials), interior members, carpet base fabrics, base fabrics such as shoes or bags, chair skin materials, clothing fabrics, and clothing It can be used as a core material such as a dust mask or a sanitary mask.
- Thermoformed non-woven fabrics molded into three-dimensional solid shapes, etc. are interior materials for automobiles such as trims, child seat bodies, various trays, bag bodies such as suitcases and lining materials, shoe insoles, injection molded products, etc. It can also be used as a substitute for plastic moldings, as a housing for general household appliances such as vacuum cleaners, air conditioners, personal computers or printers, or general office products.
- the needle punched nonwoven fabric obtained by the method according to the present invention uses a specific polyester copolymer as the sheath component of the core-sheath composite fiber, it is clear when it is thermoformed by heating and pressurization. It becomes a shape. That is, when hot embossing is performed, the concavo-convex pattern becomes clear, and when molded into a three-dimensional solid shape, it is possible to obtain a molded product excellent in form maintainability. Moreover, since a specific core-sheath type composite fiber is used, good moldability is exhibited under a wide range of heating and pressing conditions.
- Example 1 As a core component, a copolymer of ethylene glycol and terephthalic acid (melting point: 260 ° C.) was prepared. As a sheath component, a copolymer of ethylene glycol, diethylene glycol, adipic acid, terephthalic acid and isophthalic acid (melting point: 200 ° C.) was prepared. In addition, ethylene glycol as a diol component is 99 mol% and diethylene glycol is 1 mol%, adipic acid as a dicarboxylic acid component is 19 mol%, terephthalic acid is 78 mol%, and isophthalic acid is 3 mol%.
- Both the core component and the sheath component described above were supplied to a spinning device having a composite spinning hole, and melt spinning was performed to obtain a core-sheath type composite continuous fiber.
- This fiber web was conveyed to a needle punch device, and needle punching was performed at a punch density of 90 / cm 2 and a needle elongation of 10 mm to obtain a needle punched nonwoven fabric having a weight of 300 g / m 2 .
- the obtained needle punched nonwoven fabric is passed between an embossing roll and a smooth roll engraved with a leather pattern having a sculpture depth of 0.4 mm, and heated under conditions of an embossing roll temperature of 130 ° C. and a linear pressure between the rolls of 50 kg / cm. Embossed.
- the obtained embossed non-woven fabric had a textured pattern of skin-squeezed patterns clearly, was excellent in wear resistance, had sufficient flexibility, and was excellent in design.
- Comparative Example 1 As a core component, the copolymer used in Example 1 was prepared.
- a sheath component a copolymer of ethylene glycol, diethylene glycol, terephthalic acid and isophthalic acid (melting point: 230 ° C.) was prepared.
- the copolymer constituting the sheath component was 99 mol% ethylene glycol as the diol component and 1 mol% diethylene glycol, 92 mol% terephthalic acid and 8 mol% isophthalic acid as the dicarboxylic acid component.
- Both the polymers were supplied to a spinning device having a composite spinning hole, and melt spinning was performed to obtain a core-sheath type composite continuous fiber.
- the obtained needle punched nonwoven fabric was passed between an embossing roll and a smooth roll engraved with a leather pattern having a sculpture depth of 0.4 mm, and heated under conditions of an embossing roll temperature of 200 ° C. and a linear pressure between the rolls of 50 kg / cm. Embossed.
- the resulting embossed nonwoven fabric has a leather-patterned uneven pattern, but it is inferior in wear resistance, so that when it is rubbed with fingers, the fibers become fluffy at the convex parts and the core-sheath type composite long fibers are fused at the concave parts. Removed and the uneven pattern became blurred. Further, the flexibility was inferior to the needle punched nonwoven fabric of the example.
- terephthalic acid as a dicarboxylic acid component is a copolymer composed of 80 mol% and isophthalic acid is 20 mol%.
- the core-sheath type composite short fibers are opened and accumulated with a card machine to obtain a fiber web, which is immediately conveyed to a needle punch device, and subjected to needle punching at a punch density of 90 / cm 2 and a needle depth of 10 mm.
- a needle punched nonwoven fabric having a weight of 300 g / m 2 was obtained.
- the obtained needle punched nonwoven fabric was passed between an embossing roll and a smooth roll engraved with a leather pattern having a sculpture depth of 0.4 mm, and heated under conditions of an embossing roll temperature of 140 ° C. and a linear pressure between the rolls of 50 kg / cm. Although embossing was attempted, wrinkles were mixed due to the large thermal shrinkage of the needle punched nonwoven fabric, and a clear uneven pattern could not be obtained.
- Comparative Example 3 Polyester short fibers (manufactured by Unitika Ltd., product number “100”, fineness 2.0 dtex, fiber length 51 mm, melting point 260 ° C.) and core-sheath type composite short fibers used in Comparative Example 2 were prepared. After 50% by weight of polyester short fibers and 50% by weight of core-sheath type composite short fibers are uniformly mixed, they are opened and collected by a card machine to obtain a fiber web, which is immediately conveyed to a needle punch device and punched. Needle punching was performed at a density of 90 pieces / cm 2 and a needle depth of 10 mm to obtain a needle punched nonwoven fabric having a weight of 300 g / m 2 .
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nonwoven Fabrics (AREA)
- Multicomponent Fibers (AREA)
Abstract
Description
芯成分として、エチレングリコールとテレフタル酸の共重合体(融点260℃)を準備した。鞘成分として、エチレングリコール、ジエチレングリコール、アジピン酸、テレフタル酸及びイソフタル酸の共重合体(融点200℃)を準備した。なお、ジオール成分としてのエチレングリコールは99モル%でジエチレングリコールは1モル%であり、ジカルボン酸成分としてのアジピン酸は19モル%でテレフタル酸は78モル%でイソフタル酸は3モル%である。上記した芯成分と鞘成分の両者を、複合紡糸孔を持つ紡糸装置に供給して、溶融紡糸を行い、芯鞘型複合長繊維を得た。芯成分と鞘成分の重量割合は、芯成分:鞘成分=7:3であった。これを紡糸装置の下方に設けたエアーサッカーに導入し、高速で牽引細化した後、公知の開繊装置で開繊させ、移動するスクリーンコンベア上に捕集及び集積させて繊維ウェブを得た。この繊維ウェブをニードルパンチ装置に搬送し、パンチ密度90本/cm2及び針伸度10mmでニードルパンチを施し、重量300g/m2のニードルパンチ不織布を得た。
芯成分として、実施例1で用いた共重合体を準備した。鞘成分として、エチレングリコールとジエチレングリコールとテレフタル酸とイソフタル酸の共重合体(融点230℃)を準備した。鞘成分を構成する共重合体は、ジオール成分としてのエチレングリコールは99モル%でジエチレングリコールは1モル%であり、ジカルボン酸成分としてのテレフタル酸は92モル%でイソフタル酸は8モル%であった。この両重合体を、複合紡糸孔を持つ紡糸装置に供給して、溶融紡糸を行い、芯鞘型複合長繊維を得た。芯成分と鞘成分の重量割合は、芯成分:鞘成分=6:4であった。これを紡糸装置の下方に設けたエアーサッカーに導入し、高速で牽引細化した後、公知の開繊装置で開繊させ、移動するスクリーンコンベア上に捕集及び集積させて繊維ウェブを得た。この繊維ウェブをニードルパンチ装置に搬送し、パンチ密度90本/cm2及び針伸度10mmでニードルパンチを施し、重量300g/m2のニードルパンチ不織布を得た。
芯鞘型複合短繊維(ユニチカ株式会社製、品番「2080」、繊度が4.4デシテックスで、繊維長:51mmで、芯成分:鞘成分=1:1であり、鞘成分の融点が200℃である芯鞘型複合短繊維)を準備した。なお、この芯鞘型複合短繊維の芯成分は、実施例1で用いた共重合体と同一のものであり、鞘成分はジオール成分としてのエチレングリコールは99モル%でジエチレングリコールは1モル%であり、ジカルボン酸成分としてのテレフタル酸は80モル%でイソフタル酸は20モル%よりなる共重合体である。この芯鞘型複合短繊維をカード機にて開繊及び集積し、繊維ウェブを得た後、直ちにニードルパンチ装置に搬送し、パンチ密度90本/cm2及び針深度10mmでニードルパンチを施して、重量300g/m2のニードルパンチ不織布を得た。
ポリエステル短繊維(ユニチカ株式会社製、品番「100」、繊度2.0デシテックス、繊維長51mm、融点260℃) と、比較例2で用いた芯鞘型複合短繊維を準備した。ポリエステル短繊維50重量%と芯鞘型複合短繊維50重量%とを均一に混合した後、カード機にて開繊及び集積し、繊維ウェブを得た後、直ちにニードルパンチ装置に搬送し、パンチ密度90本/cm2及び針深度10mmでニードルパンチを施して、重量300g/m2のニードルパンチ不織布を得た。
Claims (7)
- 芯成分がエチレングリコールとテレフタル酸からなる共重合体よりなり、鞘成分がエチレングリコールとアジピン酸とテレフタル酸とイソフタル酸及び/又はジエチレングリコールからなる共重合体よりなる芯鞘型複合繊維を集積して繊維ウェブを形成する第一工程と、
前記繊維ウェブにニードルパンチを施すことにより、前記芯鞘型複合繊維相互間を三次元的に交絡させる第二工程と
を具備することを特徴とするニードルパンチ不織布の製造方法。 - 芯鞘型複合繊維が、芯鞘型複合長繊維又は芯鞘型複合短繊維である請求項1記載のニードルパンチ不織布の製造方法。
- 芯成分がエチレングリコールとテレフタル酸からなる共重合体よりなり、鞘成分がエチレングリコールとアジピン酸とテレフタル酸とイソフタル酸及び/又はジエチレングリコールからなる共重合体よりなる芯鞘型複合繊維を集積して繊維ウェブを形成する第一工程と、
前記繊維ウェブにニードルパンチを施すことにより、前記芯鞘型複合繊維相互間を三次元的に交絡させる第二工程と
を経て得られたニードルパンチ不織布に、加熱及び加圧を施して所定形状に成型することを特徴とする熱成型不織布の製造方法。 - 所定形状が三次元的立体形状である請求項3記載の熱成型不織布の製造方法。
- 加熱及び加圧により、鞘成分を軟化又は溶融させて、芯鞘型複合繊維相互間を融着させる請求項3又は4記載の熱成型不織布の製造方法。
- ニードルパンチ不織布に、加熱及び加圧を同時に施すか又は加熱した後に加圧を施す請求項5記載の熱成型不織布の製造方法。
- 芯成分がエチレングリコールとテレフタル酸からなる共重合体よりなり、鞘成分がエチレングリコールとアジピン酸とテレフタル酸とイソフタル酸及び/又はジエチレングリコールからなる共重合体よりなる芯鞘型複合繊維を集積して繊維ウェブを形成する第一工程と、
前記繊維ウェブにニードルパンチを施すことにより、前記芯鞘型複合繊維相互間を三次元的に交絡させる第二工程と
を経て得られたニードルパンチ不織布を、加熱されたエンボスロールを通して、表面に凹凸模様を付与すると共に、前記鞘成分を軟化又は溶融させて、前記芯鞘型複合繊維相互間を融着させることを特徴とするエンボス不織布の製造方法。
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