EP0696655B1 - Melt-adhesive composite fibers, process for producing the same, and fused fabric or surface material obtained therefrom - Google Patents
Melt-adhesive composite fibers, process for producing the same, and fused fabric or surface material obtained therefrom Download PDFInfo
- Publication number
- EP0696655B1 EP0696655B1 EP95305335A EP95305335A EP0696655B1 EP 0696655 B1 EP0696655 B1 EP 0696655B1 EP 95305335 A EP95305335 A EP 95305335A EP 95305335 A EP95305335 A EP 95305335A EP 0696655 B1 EP0696655 B1 EP 0696655B1
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- EP
- European Patent Office
- Prior art keywords
- composite fibers
- melt
- fibers
- fabric
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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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
- D04H1/43832—Composite fibres side-by-side
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- 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
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- 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
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- 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
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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
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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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
- D04H1/42—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
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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
- D04H1/4391—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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- 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
Definitions
- the present invention relates to melt-adhesive composite fibers and a process for producing the composite fibers. Further, the present invention relates to a partially fused fabric comprising the composite fibers and having a high strength, high bulk recovery from compression, excellent formation characteristics of few neps (small fiber aggregates), and soft hand feeling. Still further, the present invention relates to a surface material, for medical supplies such sanitary napkins and paper diapers, comprising the partially fused fabric.
- the non-woven fabric is still unsatisfactory as a surface material for medical supplies, and specifically the nonwoven fabric obtained in the Publication '505 had the problems that troubles occur at the carding step; many neps are formed to deteriorate the fabric performances; bulk recovery is low; strength is low, and hand feeling is poor.
- the development of a non-oven fabric which solves such problems as mentioned above has strongly been desired.
- the present invention is to provide melt-adhesive composite fibers comprising a first component comprising a crystalline polypropylene and a second component comprising a polyethylene, the components being arranged in a side-by-side or sheath-core relationship wherein the second component is continuously present on at least a part of the fiber surface in the lengthwise direction of the fiber, having three-dimensional crimps of 4 to 16/2.54 cm, having a filamentary denier of 1.0 to 2.0, and having an apparent length of 20 to 40 mm.
- the composite fibers of the present invention can be produced by conducting
- the present invention is to provide a partially fused fabric comprising more than 50 % by weight of the melt-adhesive composite fibers mentioned above or the fibers obtained by the process according to the process mentioned above.
- intersectional points of the composite fibers are melted to join with each other through the second component in the composite fibers.
- the present invention is to provide a surface material, for medical supplies, having a thickness of greater than 1 mm, and comprising the partially fused fabric mentioned above.
- Fig. 1 shows a cross-section of a composite fiber of the present invention.
- the crystalline polypropylene used as a first component in the composite fibers of the present invention generally means a crystalline polymer containing polymerized propylene as a main component (e.g. forming 80 to 100% by weight of the first component), and includes not only homopolymers of propylene but also copolymers of propylene with ethylene, butene-1, or 4-methyl pentene.
- the polyethylene used as a second component in the composite fibers of the present invention generally means a polymer such as a medium or low pressure polyethylene and high pressure polyethylene containing polymerized ethylene, and includes not only homopolymers of ethylene but also copolymers with propylene, butene-1, or vinyl acetate (EVA).
- the melting point of the polyethylene is preferably lower than the melting point of the crystalline polypropylene as the first component by 20°C or more.
- the crystalline polypropylene and polyethylene mentioned above may contain various additives, generally used for polyolefin fibers, such as a stabilizer, filler, and pigment within a range wherein the object of the present invention is not failed to achieve.
- the melt-adhesive composite fibers in the present invention are ones extruded from a spinneret for side-by-side type or sheath-core type composite fiber.
- the second component is necessary to be continuously present on at least a part of the fiber surface in the lengthwise direction of the fiber, and the second component preferably occupy the fiber surface as broadly as possible. Since the melt-adhesive composite fibers develop crimps by utilizing the difference in the elastic shrinkage of the two components, an eccentric sheath-core structure as shown in Fig.
- the center of the core component is preferably biased by 5 to 15 % (based on the diameter of the sheath-core composite fiber) from the center of sheath component.
- the composite fibers of the present invention can be obtained by conventional methods for spinning a side-by-side composite fiber or sheath-core composite fiber wherein the second component is used as sheath component.
- the second component is preferably 40 to 70 % by weight.
- the melt-adhesive composite fibers of the present invention have three-dimensional crimps.
- the composite fibers preferably do not develop crimps at the time of a heat treatment for preparing a non-woven fabric, in other words, the composite fibers of the present invention preferably do not have latent crimps.
- the shrinkage of the fibers caused by the developments of crimps at the time of the heat treatment for preparing the non-woven fabric can be avoided.
- the number of crimps of the melt-adhesive composite fibers in the present invention is generally 4 to 16/2.54 cm, and preferably 6 to 14/2.54 cm. When the number of crimps is less than 4/2.54 cm, it causes winding of fibers on a cylinder of a carding machine. When the number of crimps exceeds 16/2.54 cm, the opening becomes inferior, and results in the formation of naps at the time of non-woven fabric preparation.
- the melt-adhesive composite fibers of the present invention are necessary to have a filamentary denier of 1.0 to 2.0.
- the denier is less than 1.0, crimps become too fine and causes the formation of naps.
- the denier exceeds 2.0, there is a tendency that the hand feeling becomes hard and the bulk recovery of the non-woven fabric from compression decreases.
- the apparent cut length of the melt-adhesive composite fibers of the present invention is 20 to 40 mm, and preferably 25 to 35 mm.
- it is less than 20 mm, the transfer property of the fibers in carding machines is inferior and it becomes a cause of troubles that the fibers wind around workers.
- it exceeds 40 mm entanglement of the fibers becomes noticeable and becomes a cause of nap formation.
- the melt-adhesive composite fibers of the present invention have preferably the ratio of apparent cut length to cut length of 50 to 70 %.
- the ratio is less than 50 %, the transfer property of the fibers in carding machines is inferior, and the fibers wind around cylinders, resulting in a cause of nap formation.
- the ratio exceeds 70 %, entanglement of the fibers becomes too strong, winding of fibers on a taker-in roll is caused, and the carding step itself become impossible.
- the method for producing the melt-adhesive composite fibers of the present invention comprises
- the first component comprising a crystalline polypropylene and the second component comprising mainly a polyethylene are extruded through a spinneret for side-by-side or sheath-core type composite fibers to form filaments such that the second component continuously present on at least a part of the fiber surface.
- unstretched filaments as extruded are subjected to a preheating to a stretching temperature.
- stretching temperature is lower than 90°C, crimps become too fine.
- stretching temperature exceeds 130°C, remarkable fusion of the composite fibers with each other unfavorably occur through the polyethylene.
- the maximum stretching ratio means the stretching ratio at which fluffs begin to occur in filaments tow when the stretching ratio was gradually increased.
- stretched filaments are cooled at a temperature lower than the stretching temperature, the filaments are taken up with a roll such as a take-up roll of a nip roll under a tensioned condition, and then the filaments are relaxed to develop crimps.
- a roll such as a take-up roll of a nip roll under a tensioned condition
- the filaments are relaxed to develop crimps.
- the filaments which developed crimps at the crimping treatment are subjected to an annealing at a temperature higher than 80°C, but lower than 120°C for 0.5 to 30 min.
- the annealing temperature is lower than 80°C, there is a fear that latent crimps are unfavorably developed at the step for preparing a non-woven fabric.
- the annealing temperature is higher than 120°C, the crimps which were developed due to the difference in elastic recovery of the two components are extended and an apparent cut length of the fibers becomes unfavorably long.
- melt-adhesive composite fibers of the present invention are frequently cut to a predetermined length and used as staple fibers from the viewpoint of the easiness of processing to non-woven fabrics.
- the partially fused fabric of the present invention may comprise more than 50 % by weight, and up to 100 % by weight of the melt-adhesive composite fibers mentioned above.
- the partially fused non-woven fabric can be obtained by converting the melt-adhesive composite fibers into a non-woven fabric by a conventional carding method, air-laid method, or dry-pulp method and then subjecting the non-woven fabric to a heat treatment to partially fuse the fabric.
- the partially fused non-woven fabric may comprise up to 50 % by weight of polyester, polyamide, polypropylene, polyethylene, or other synthetic fibers, natural fibers such as cotton and wool, or regenerated fibers such as viscose rayon, as the fibers other than the melt-adhesive composite fibers.
- melt-adhesive composite fibers are necessary to be blended in an amount of 50 % by weight or more in the fabric.
- content of the melt-adhesive composite fibers is less than 50 % by weight, not only a fabric having a high non-woven strength can not be obtained since the fabric has few intersection of the fibers, but also a high bulkiness and a high bulk recovery of the fabric from compression as intended can not be obtained.
- a method by using a heated air dryer or suction band dryer can be exemplified.
- the temperature for the fusing is generally higher than the melting point of the second component, but lower than the melting point of the first component, and preferably 120 to 155°C.
- the time for the fusing is generally longer than 5 seconds when a dryer is used as an example.
- the surface material for medical supplies of the present invention is one prepared by using the partially fused non-woven fabric, and usually has a thickness of greater than 1 mm.
- the surface material is desirable when the bulk characteristic is greater than 1 mm and elastic recovery from compression is higher than 50 % in particular. When the thickness is less than 1 mm and the recovery is lower than 50 %, a soft hand feeling of the material can not be obtained.
- the thickness referred in this specification means the thickness (mm) which is determined by applying a load of 50 gf/cm 2 on the material for 24 hours, allowing the material to stand under no load for 1 hour to recover the thickness, and then measuring the thickness (mm) under a load of 2 gf/cm 2 .
- the elastic recovery from compression means the difference designated as percentage (%) in the thickness of a surface material measured after a load of 50 kgf/cm2 was applied for 24 hours and the thickness of the same surface material measured after the material was left to stand under no load for 1 hour to recover its thickness.
- melt-adhesive composite fibers can be produced, which have a high bulk recovery, good formation characteristics, high strength, and soft hand feeling at the same time, and thus are useful as a surface material for medical supplies.
- the partially fused fabrics of the present invention can be widely used for sanitary napkins and paper diapers.
- the number of crimps of the melt-adhesive composite fibers was determined according to JIS L1015 (Test method for chemical fiber staples) 7.12.1.
- Filamentary denier The filamentary denier of the melt-adhesive composite fibers was determined according to JIS L1015 (Test method for chemical fiber staples) 7.5.1-A.
- Apparent cut length The apparent cut length of the melt-adhesive composite fibers was determined by measuring the fiber length (mm) under no tension without extending the crimps of the staples and without applying an extra force to the staples. The average value of 30 times of measurements was obtained.
- the fabrics having a bulk recovery of 50 % or higher were regarded as acceptable and other fabrics were regarded as unaccetptable. Acceptable fabrics were designated as A and unacceptable fabrics were designated as C.
- Strength of non-woven fabric The strength of partially fused non-woven fabrics was determined according to JIS L1085 (Test for interlining cloth of non-woven fabric) in which a sample fabric of 5 cm wide was subjected to measuring for strength in the fabric direction (MD) and the direction perpendicular to the fabric direction (CD) by stretching the fabric under the conditions of a grip distance of 10 cm and a stretch rate of 30 ⁇ 2 cm/min.
- MD fabric direction
- CD direction
- Acceptable fabrics were designated as A and unacceptable fabrics were designated as C.
- the number of naps of the partially fused non-woven fabrics was determined by counting the number of naps in 1 m 2 of a sample fabric, and designated as the number/m 2 .
- partially fused non-woven fabrics having one nap or less were regarded as acceptable and two or more as unacceptable. Acceptable fabrics were designated as A and unacceptable fabrics were designated as C.
- Hand feeling The hand feeling of the partially fused nonwoven fabrics was determined by conducting sensory tests by 5 panelists. When all panelists judged a sample fabric as soft, the fabric was regarded as "excellent”; when 3 or more panelists judged a sample fabric as soft, the fabric was regarded as "good”; and when 3 or more panelists judged a sample fabric as insufficient in soft feeling, the fabric was regarded as "poor". Excellent fabrics were designated as A, good fabrics were designated as B, and poor ones were as C.
- Fabric shrinkage The shrinkage of the partially fused nonwoven fabrics was determined by cutting a sample fabric into a size of 25 cm square, heating the fabric at 145°C for 5 min under no load with a dryer, measuring the shrinkage in the fabric direction at three points, and obtain the average value by calculation. In the evaluation, the fabrics having a shrinkage of lower than 10 % were regarded as acceptable and the fabrics having a shrinkage of 10 % or higher were regarded as unacceptable. Acceptable fabrics were designated as A and unacceptable fabrics were designated as C.
- Each of the melt-adhesive composite fiber staples shown in Table 1 was obtained by extruding a polypropylene as the first component and a polyethylene as the second component through a spinneret having 350 orifices of a diameter of 0.6 mm for sheath-core or side-by-side type composite fiber to form filaments, stretching the filaments under the conditions shown in Table 1, and then cutting the stretched filaments into staples.
- the physical properties of the fibers thus obtained are shown in Table 1.
- the staples of each of the melt-adhesive composite fibers thus obtained were formed into a web having a basis weight of 20 to 30 g/m 2 by means of a carding machine, and the web was subjected to a heat treatment at a predetermined temperature of 135 to 140°C for 5 sec with a suction band dryer to obtain a non-woven fabric in which intersections of the fibers were fused each other.
- the characteristics of the fabrics are shown in Table 2.
- the staples in Example 1 and Comparative Example 3 were used.
Description
Claims (4)
- Melt-adhesive composite fibres comprising a first component comprising a crystalline polypropylene and a second component comprising a polyethylene, the components being arranged in a side-by-side or sheath-core relationship, and wherein the second component is continuously present on at least a part of the fiber surface along the length of the fiber; the fibers having three-dimensional crimps of 4 to 16/2.54 cm, a filamentary denier of 1.0 to 2.0, and an apparent cut length of 20 to 40 mm.
- A process for producing melt-adhesive composite fibers according to claim 1, which process comprises the steps of spinning the polymer components by using a spinneret for side-by-side or sheath-core type composite fibers; stretching the unstretched filaments thus obtained at a temperature of higher than 90°C, but below 130°C, at a stretching ratio of 0.60 to 0.85 time the maximum stretching ratio, cooling the stretched filaments to a temperature below a preheating temperature and subjecting the filaments to a crimping treatment, and subjecting the filaments to an annealing at a temperature of higher than 80°C, but below 120°C.
- A partially fused non-woven fabric comprising more than 50% by weight of melt-adhesive composite fibers according to claim 1 or fibers obtained by the process according to claim 2, the intersectional points of the composite fibers being melted to join with each other through the second component in the composite fibers.
- A surface material, for medical supplies, having a thickness of greater than 1 mm, comprising the partially fused non-woven fabric according to claim 3.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21062994A JP3569972B2 (en) | 1994-08-11 | 1994-08-11 | Heat-fusible composite fiber and heat-fusible nonwoven fabric |
JP210629/94 | 1994-08-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0696655A1 EP0696655A1 (en) | 1996-02-14 |
EP0696655B1 true EP0696655B1 (en) | 1998-06-03 |
Family
ID=16592494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95305335A Expired - Lifetime EP0696655B1 (en) | 1994-08-11 | 1995-07-31 | Melt-adhesive composite fibers, process for producing the same, and fused fabric or surface material obtained therefrom |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0696655B1 (en) |
JP (1) | JP3569972B2 (en) |
KR (1) | KR100350175B1 (en) |
CN (1) | CN1068390C (en) |
BR (1) | BR9503626A (en) |
DE (1) | DE69502775T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11491057B2 (en) | 2014-11-06 | 2022-11-08 | The Procter & Gamble Company | Crimped fiber spunbond nonwoven webs / laminates |
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CN1079851C (en) * | 1995-12-25 | 2002-02-27 | 帝人株式会社 | Heat-bondable conjugated fiber and high-modulus fiber globoid made thereof |
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US6410138B2 (en) | 1997-09-30 | 2002-06-25 | Kimberly-Clark Worldwide, Inc. | Crimped multicomponent filaments and spunbond webs made therefrom |
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US20040043214A1 (en) * | 2002-08-30 | 2004-03-04 | Kimberly-Clark Worldwide, Inc. | Method of forming a 3-dimensional fiber and a web formed from such fibers |
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EP1577426B1 (en) | 2002-12-24 | 2016-06-01 | Kao Corporation | Heat fusible conjugate fiber |
JP2006045730A (en) * | 2004-08-06 | 2006-02-16 | Toyobo Co Ltd | Water-absorbing nonwoven fabric and plaster |
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JP2009037012A (en) * | 2007-08-02 | 2009-02-19 | Teijin Fibers Ltd | Fiber roller, cleaning roller, seal member and its manufacturing method |
TW200934897A (en) * | 2007-12-14 | 2009-08-16 | Es Fiber Visions Co Ltd | Conjugate fiber having low-temperature processability, nonwoven fabric and formed article using the conjugate fiber |
CN101530628B (en) * | 2009-04-17 | 2013-07-31 | 东华大学 | Composite flowing layer material and preparation method thereof |
US20160136010A1 (en) | 2014-11-06 | 2016-05-19 | The Procter & Gamble Company | Absorbent articles comprising garment-facing laminates |
JP6546500B2 (en) * | 2015-10-14 | 2019-07-17 | 株式会社ブリヂストン | Pneumatic tire and method of manufacturing the same |
BR102016012020A2 (en) * | 2016-05-25 | 2016-08-23 | Ambitec S A | process of recovery and manufacture of plastics contained in sanitary napkins and diapers |
EP4335420A2 (en) | 2017-02-16 | 2024-03-13 | The Procter & Gamble Company | Absorbent articles with substrates having repeating patterns of apertures comprising a plurality of repeat units |
TWI751535B (en) * | 2020-04-24 | 2022-01-01 | 三芳化學工業股份有限公司 | Woven structure and method for manufacturing the same |
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GB1134924A (en) * | 1965-10-23 | 1968-11-27 | Asahi Chemical Ind | Conjugate filaments and process for the production thereof |
US3509013A (en) * | 1966-09-26 | 1970-04-28 | Hercules Inc | Composite polypropylene filament |
US3505164A (en) * | 1967-06-23 | 1970-04-07 | Hercules Inc | Self-bulking conjugate filaments |
JPS5823951A (en) * | 1981-07-31 | 1983-02-12 | チッソ株式会社 | Production of bulky nonwoven fabric |
JPH0726252B2 (en) * | 1988-11-16 | 1995-03-22 | 帝人株式会社 | Thermal adhesive composite fiber |
JP2846675B2 (en) * | 1989-10-23 | 1999-01-13 | 宇部日東化成株式会社 | Composite fiber with excellent bulkiness |
JPH04163315A (en) * | 1990-10-22 | 1992-06-08 | Daiwabo Create Kk | Divided type conjugate fiber |
JPH04174779A (en) * | 1990-11-02 | 1992-06-22 | Toyobo Co Ltd | Interlining cloth |
JP3048400B2 (en) * | 1991-04-11 | 2000-06-05 | ユニチカ株式会社 | Non-woven |
-
1994
- 1994-08-11 JP JP21062994A patent/JP3569972B2/en not_active Expired - Fee Related
-
1995
- 1995-07-21 KR KR1019950021474A patent/KR100350175B1/en not_active IP Right Cessation
- 1995-07-31 DE DE69502775T patent/DE69502775T2/en not_active Expired - Fee Related
- 1995-07-31 EP EP95305335A patent/EP0696655B1/en not_active Expired - Lifetime
- 1995-08-10 CN CN95115526A patent/CN1068390C/en not_active Expired - Fee Related
- 1995-08-11 BR BR9503626A patent/BR9503626A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11491057B2 (en) | 2014-11-06 | 2022-11-08 | The Procter & Gamble Company | Crimped fiber spunbond nonwoven webs / laminates |
Also Published As
Publication number | Publication date |
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BR9503626A (en) | 1997-09-16 |
KR960007849A (en) | 1996-03-22 |
DE69502775T2 (en) | 1998-10-29 |
JPH0860441A (en) | 1996-03-05 |
CN1128305A (en) | 1996-08-07 |
KR100350175B1 (en) | 2002-12-26 |
DE69502775D1 (en) | 1998-07-09 |
CN1068390C (en) | 2001-07-11 |
EP0696655A1 (en) | 1996-02-14 |
JP3569972B2 (en) | 2004-09-29 |
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