CN102877217A - Telescopic non-woven fabric and method of manufacturing the same - Google Patents
Telescopic non-woven fabric and method of manufacturing the same Download PDFInfo
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- CN102877217A CN102877217A CN2012102408317A CN201210240831A CN102877217A CN 102877217 A CN102877217 A CN 102877217A CN 2012102408317 A CN2012102408317 A CN 2012102408317A CN 201210240831 A CN201210240831 A CN 201210240831A CN 102877217 A CN102877217 A CN 102877217A
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- composite fibre
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
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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
- D04H1/44—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
- D04H1/50—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 treatment to produce shrinking, swelling, crimping or curling 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
- D04H1/54—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
- D04H1/544—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
- D04H1/54—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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- 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
- D04H13/00—Other non-woven fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/063—Load-responsive characteristics high strength
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/02—Bandages, dressings or absorbent pads
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention provides a telescopic non-woven fabric and a method of manufacturing the same. The telescopic non-woven fabric evenly comprises thin plate splines formed by, by mass, 90%-60% of a heat shrinkable composite fiber (A) obtained by using at least two resin components having different melting points, and 10%-40% of a heat bonding composite fiber (B) obtained by using at least two resin components having different melting points. By a specific heat treatment (1), the heat shrinkable composite fiber (A) is shrunk; and by a specific heat treatment (2), the resin component having the lowest melting point is fused to realize the heat bonding between fibers, so that the fibers are jointed integrally.
Description
Technical field
The present invention relates to the nonwoven fabric of a kind of retractility and the excellent strength when flexible, it is particularly suitable for the base fabric, bandage etc. of the ear-hanger of disposable breathing mask or cataplasm.And then, the present invention relates to the manufacture method of this kind nonwoven fabric.
Background technology
The hot joining of the low melting point composition of the hot joining property the composite fibre by comprising 2 kinds of different thermoplastic resins of fusing point nonwoven fabric that fiber is followed each other, because health and sense of touch are excellent, therefore is usually used in mouth mask or the purposes such as nappy, hygenic towelette.As the method for this kind nonwoven fabric being given retractility, known have when the hot joining property composite fibre hot joining, and uses as manifest the method (for example with reference to patent documentation 1) of the fiber of crispaturaing.
But, in this kind method, because in heat treatment step, by the hot joining of the hot joining property composite fibre caused interfibrous joint, with manifest caused thermal contraction by crispaturaing of heat-shrinkable composite fibre and carry out simultaneously, therefore before the heat-shrinkable composite fibre shrinks fully, engage between fiber.The retractility of the nonwoven fabric that therefore, obtains or texture are also insufficient.In addition, owing in the process of the fiber positive change of position relationship each other, produce hot joining, therefore exist to be difficult to form firmly then point, and cause being difficult to obtain this problem of intensity of enough nonwoven fabric.
The prior art document
Patent documentation
The clear 59-211668 communique of patent documentation 1 Japanese Patent Laid-Open
Summary of the invention
The object of the invention is to solve existing problem in the described prior art, the nonwoven fabric of a kind of feel of harmless nonwoven fabric or uniformity and unprecedented retractility and the excellent strength when flexible is provided.
The people such as present inventor have carried out making great efforts research for the nonwoven fabric that obtains retractility and the excellent strength when flexible.Its result, find that following nonwoven fabric can reach desired purpose, thereby finished this invention, this nonwoven fabric is the nonwoven fabric that obtains by following mode: the heat-shrinkable composite fibre is mixed with specific ratio equably with the hot joining property composite fibre, under the lower temperature of the fusing point of the resinous principle minimum than the fusing point that consists of the heat-shrinkable composite fibre, the thermal contraction that enforcement is crispaturaed in the shape of a spiral and manifested by the heat-shrinkable composite fibre, then under the temperature of the softening point of the minimum resinous principle of the fusing point that surpass to consist of the hot joining property composite fibre, hot joining between fiber in this low-melting resinous principle melting, thereby made its joint integrated.
Therefore, the present invention is a kind of flexible nonwoven fabrics, comprise equably heat-shrinkable composite fibre (A) the 90 quality % that use at least 2 kinds of different resinous principles of fusing point to obtain～60 quality %, and the lamellar (web) that the hot joining property composite fibre (B) 10 quality %～40 quality % form that uses at least 2 kinds of different resinous principles of fusing point to obtain, by the heat treatment (1) under the lower temperature of the fusing point of the minimum resinous principle of fusing point among than the resinous principle that consists of heat-shrinkable composite fibre (A), and after making heat-shrinkable composite fibre (A) thermal contraction, softening point by the minimum resinous principle of fusing point among than the resinous principle that consists of the hot joining property composite fibre (B) is high 5 ℃～heat treatment (2) under 10 ℃ the temperature, and hot joining between fiber in the minimum resinous principle melting of this fusing point, thereby make its joint integrated.Preferably than among the resinous principle that consists of heat-shrinkable composite fibre (A), the fusing point of the resinous principle that fusing point is minimum hangs down 5 ℃～20 ℃ temperature to the treatment temperature of heat treatment (1).
Preferred example of the present invention is following flexible nonwoven fabrics: heat-shrinkable composite fibre (A) comprise Noblen or Ethylene-Propylene Block Copolymer and be selected from ethene and alpha-olefin in a kind or 2 kinds of alkene-random copolymer of propylene with propylene, the hot joining property composite fibre (B) comprises Noblen or polyethylene terephthalate, and Alathon.As another preferred example of the present invention, flexible nonwoven fabrics with following form is arranged: heat-shrinkable composite fibre (A) is the eccentric sheath core pattern that the resinous principle that fusing point is minimum is configured in the sheath side, and this resinous principle accounts for 30%～90% of fiber surface.
And then, the present invention is towards the manufacture method of described flexible nonwoven fabrics, the method is the manufacture method of the flexible nonwoven fabrics that comprises the steps: the heat-shrinkable composite fibre (A) that will use at least 2 kinds of different resinous principles of fusing point to obtain, and use the hot joining property composite fibre (B) that at least 2 kinds of different resinous principles of fusing point obtain with (A): (B)=90:10～60:40 De Quality amount ratio mixes equably and obtains lamellar, under the lower temperature of the fusing point of the resinous principle that fusing point is minimum among than the resinous principle that consists of heat-shrinkable composite fibre (A) this lamellar is implemented heat treatment (1), and make heat-shrinkable composite fibre (A) thermal contraction, the softening point of the resinous principle that fusing point is minimum among than the resinous principle that consists of the hot joining property composite fibre (B) then is high 5 ℃～10 ℃ temperature under, described lamellar is implemented heat treatment (2), and hot joining between fiber in the minimum resinous principle melting of this fusing point, thereby make its joint integrated.
The effect of invention
The texture of flexible nonwoven fabrics of the present invention is good, and when having carried out repeat pull, its elongation recovery rate is excellent with the balance of the intensity in when elongation, can preferably be used for the purposes of the base fabric, bandage etc. of the ear-hanger of disposable breathing mask or cataplasm.
Manufacturing method according to the invention in the manufacture process of nonwoven fabric, at first mainly manifests thermal contraction, secondly mainly manifesting hot joining, therefore can reach sufficient texture, and the intensity of nonwoven fabric is become fully, thereby can obtain excellent flexible nonwoven fabrics.
The specific embodiment
In the present invention, so-called " mixing equably ", refer to heat-shrinkable composite fibre (A) be mixed with the hot joining property composite fibre (B) before thermal contraction and hot joining carrying out.In addition, so-called " comprising equably ", refer to that heat-shrinkable composite fibre (A) is included in the lamellar that obtains by described mixing with the state that mixes with the hot joining property composite fibre (B).
Flexible nonwoven fabrics of the present invention is to comprise equably heat-shrinkable composite fibre (A) the 90 quality % that use at least 2 kinds of different resinous principles of fusing point to obtain～60 quality %, and the lamellar that the hot joining property composite fibre (B) 10 quality %～40 quality % form that uses at least 2 kinds of different resinous principles of fusing point to obtain, by the heat treatment (1) under the lower temperature of the fusing point of the minimum resinous principle of fusing point among than the resinous principle that consists of heat-shrinkable composite fibre (A), and after making heat-shrinkable composite fibre (A) thermal contraction, softening point by the minimum resinous principle of fusing point among than the resinous principle that consists of the hot joining property composite fibre (B) is high 5 ℃～heat treatment (2) under 10 ℃ the temperature, and hot joining between fiber in the minimum resinous principle melting of this fusing point, thereby make its joint integrated.
The heat-shrinkable composite fibre (A) of employed formation flexible nonwoven fabrics among the present invention, and fibre length and the indefinite of the hot joining property composite fibre (B), but just make heat-shrinkable composite fibre (A) fully after the thermal contraction, the hot joining property composite fibre (B) hot joining, usually preferably cut into the staple fibre about 10mm～100mm.
With regard to making the viewpoint that manifests very evenly as the retractility of the retractility Nonwovens of target and the intensity when flexible, retractility Nonwovens of the present invention by take heat-shrinkable composite fibre (A) as 90 quality %～60 quality %, with the hot joining property composite fibre (B) be that the lamellar that 10 quality %～ratio of 40 quality % mixes is equably made.Wherein, preferably by take heat-shrinkable composite fibre (A) as 85 quality %～65 quality %, with the hot joining property composite fibre (B) be the retractility Nonwovens of the lamellar made that mixes equably of the ratio of 15 quality %～35 quality %.
This kind lamellar can pass through known device, devices such as carding machine, random loom (random weber), with heat-shrinkable composite fibre (A) and the hot joining property composite fibre (B) with (A): (B)=quality ratio of 90:10～60:40 mixes to make.
Ratio by heat-shrinkable composite fibre (A) is in the scope of 90 quality %～60 quality %, can make retractility (recovery rate), the intensity when stretching and the texture of nonwoven fabric become good.
Employed heat-shrinkable composite fibre (A) is the heat-shrinkable composite fibre that comprises at least 2 kinds of different resinous principles of fusing point among the present invention.Among the resinous principle that consists of this heat-shrinkable composite fibre (A), the resinous principle that fusing point is minimum, but illustration is take propylene as the main alkene-random copolymer of propylene that is selected from ethene and the alpha-olefin a kind or 2 kinds and propylene.As alpha-olefin, but such as illustration: butene-1, amylene-1, hexene-1, heptene-1, octene-1,4-methylpentene-1 etc.Also may be used in these ethene and the alpha-olefin more than 2 kinds.Concrete example as alkene-random copolymer of propylene, but illustration ethylene-propylene random copolymer, propene-1-butene-1 random copolymer, ethylene-propylene-butene-1 random copolymer, propylene-hexene-1 random copolymer, propylene-octene-1 random copolymer etc., and their mixture, the form of polymerization is generally random copolymer, but also can comprise block copolymer as mixture.The minimum resinous principle of described fusing point is just in the step of making heat-shrinkable composite fibre (A), namely extend processability in the step manifesting spinning, or during the thermal contraction in the step of heat treatment (1), interfibrous hot joining is manifested, its fusing point preferably than the treatment temperature of heat treatment (1) high 5 ℃～20 ℃ fusing point.Therefore, when the minimum resinous principle of described fusing point is alkene-random copolymer of propylene, the scope that its fusing point is preferred 125 ℃～138 ℃.
Among the resinous principle that consists of heat-shrinkable composite fibre of the present invention (A), when the resinous principle that fusing point is minimum is alkene-random copolymer of propylene, with regard to the cost aspect, the propylene that comprises 90 quality %～98 quality %, the ethene of 1 quality %～7 quality %, the ethylene-propylene of the butene-1 of 1 quality %～5 quality %-butene-1 random copolymer, or comprise the propylene of 90 quality %～98 quality %, the ethylene-propylene random copolymer of the ethene of 2 quality %～10 quality % is also preferred, low-temperature processability when just carrying out shrink process by heat, the viewpoint of convergent force, more preferably use the propylene that comprises 90 quality %～97 quality %, the ethylene-propylene random copolymer of the ethene of 3 quality %～10 quality %, or comprise the propylene of 90 quality %～96 quality %, the ethene of 3 quality %～7 quality %, the ethylene-propylene of the butene-1 of 1 quality %～5 quality %-butene-1 random copolymer.In these copolymers, if propylene is more than the 90 quality %, then fusing point can not become low, processability when extending to make this heat-shrinkable composite fibre (A) by spinning descends to being difficult for producing or being difficult for producing interfibrous hot joining when thermal contraction and, and can obtain sufficient retractility when making nonwoven fabric.In addition, if propylene is below the 98 quality %, then when thermal contraction, produces fully and shrink, when making nonwoven fabric, can obtain sufficient retractility.
Moreover, so long as do not make the degree that the heat-shrinkable of heat-shrinkable composite fibre (A) descends terrifically or the degree that suppresses mildly heat-shrinkable, then optionally also can be among the resinous principle that consists of heat-shrinkable composite fibre (A), the resinous principle that fusing point is minimum, such as adding the inorganic matters such as titanium dioxide, calcium carbonate and magnesium hydroxide in alkene-random copolymer of propylene, or fire retardant, pigment and other polymer.
Among the resinous principle that consists of employed heat-shrinkable composite fibre (A) among the present invention, the resinous principle that fusing point is high, can preferably use Noblen or Ethylene-Propylene Block Copolymer, with regard to the rigidity aspect of fiber, more preferably Noblen.This kind Noblen or Ethylene-Propylene Block Copolymer can be by the general acquisitions such as Ziegler-Natta catalyst.The high resinous principle of described fusing point is for the viewpoint of the form that must keep in not melting in the step of heat treatment (2) fiber, preferably with the resinous principle that consists of heat-shrinkable composite fibre (A) among, the fusing point of the resinous principle that fusing point is minimum is poor to be more than 20 ℃.Therefore, when the high resinous principle of described fusing point was described Noblen or Ethylene-Propylene Block Copolymer, its fusing point was preferred more than 158 ℃.
Moreover, in the scope of damaging indistinctively effect of the present invention, also can be among the resinous principle that consists of heat-shrinkable composite fibre (A), the resinous principle that fusing point is high is to add the inorganic matters such as titanium dioxide, calcium carbonate and magnesium hydroxide in Noblen or the Ethylene-Propylene Block Copolymer, or fire retardant, pigment and other polymer.
Consist of among the resinous principle of the heat-shrinkable composite fibre (A) among the present invention, the Area Ratio of the resinous principle that the resinous principle that fusing point is minimum and fusing point are high (for example, in the situation of eccentric sheath core type composite fiber, with the sheath composition (low-melting resinous principle) of fiber on the section that forms with the cutting of the direction of fiber axis direction quadrature and the Area Ratio of core composition (resinous principle that fusing point is high)) preferred 30/70～70/30 scope, more preferably 40/60～60/40 scope.If this Area Ratio is 30/70～70/30, the thermal shrinkage force that then can produce from the step of heat treatment (1) is given fully spiral helicine crispaturaing to fiber, therefore can obtain the flexible nonwoven fabrics of retractility excellence.In addition, if in the scope of described Area Ratio, then can give fully spiral helicine crispaturaing, so thermal contraction is also many, can obtain sufficient retractility.
Consist of among the resinous principle of the heat-shrinkable composite fibre (A) among the present invention, the complex morphological of the resinous principle that the resinous principle that fusing point is minimum and fusing point are high preferably is configured in low-melting resinous principle the eccentric sheath core pattern of sheath side.The resinous principle that more preferably fusing point is minimum accounts for 30%～95% eccentric sheath core type composite fiber of fiber surface.If this kind heat-shrinkable composite fibre (A), then when thermal contraction, spiral helicine crispaturaing becomes easier and manifests, and the retractility of nonwoven fabric promotes effect and improves.
Have under this condition of performance that can spiral be crispaturaed by heat treatment (1) to manifest, and in the degree that does not hinder effect of the present invention, employed heat-shrinkable composite fibre (A) also can be following fiber among the present invention: the machinery of being given continuously in the longitudinal direction at least a kind of shape of crispaturaing with sawtooth pattern or Ω type etc. is in advance crispaturaed.
In addition, the preferred percent thermal shrinkage of the heat-shrinkable composite fibre (A) among the present invention is more than 60%, and this percent thermal shrinkage is to use separately this fiber also to be 200g/m by the weight per unit area of carding machine made
2The comb and parallel cotton fibers prior to spinning lamellar cut into vertical 25cm * horizontal 25cm, then utilize air drier, under 145 ℃, carry out heat treatment in 5 minutes, then place cooling, and mensuration MD direction (so-called MD direction, refer to from carding machine to extract out the direction of comb and parallel cotton fibers prior to spinning lamellar) length and the percent thermal shrinkage that obtains, with regard to the viewpoint that the retractility that makes the nonwoven fabric that obtains or the strength balance ground when flexible manifest, more preferably this percent thermal shrinkage is more than 70%.
The employed hot joining property composite fibre (B) is the hot joining property the composite fibre that uses at least 2 kinds of different resins of fusing point to obtain among the present invention, with regard to the nonwoven fabric that obtains has this viewpoint of good retractility, the hot joining property the composite fibre of crispaturaing that preferably has sawtooth pattern, screw type or Ω type, wherein, the hot joining property the composite fibre of crispaturaing that more preferably has screw type.The hot joining property composite fibre (B) is following composite fibre: in heat treatment (2), among the resinous principle that consists of this hot joining property composite fibre (B), the heat fusing of the resinous principle that fusing point is minimum, and the hot joining property composite fibre (B) intersection point is each other reached or with the intersection point hot joining of heat-shrinkable composite fibre (A).
The employed hot joining property composite fibre (B) is the hot joining property the composite fibre that uses at least 2 kinds of different resinous principles of fusing point to obtain among the present invention, among the resinous principle that consists of the hot joining property composite fibre (B), the resinous principle that fusing point is minimum, preferred high density polyethylene (HDPE), as long as damage indistinctively effect of the present invention, then also can add other polymer such as low density polyethylene (LDPE) or straight chain shape low density polyethylene (LDPE).For the flexible nonwoven fabrics that obtains obtains sufficient retractility, the minimum resinous principle of described fusing point preferably when the thermal contraction that makes heat-shrinkable composite fibre (A) in the step of heat treatment (1) manifests, does not make the hot joining property of the hot joining property composite fibre (B) manifest.Therefore, among the resinous principle that consists of the hot joining property composite fibre (B), when the resinous principle that described fusing point is minimum is high density polyethylene (HDPE), the scope that its fusing point is preferred 125 ℃～135 ℃.
The high resinous principle of fusing point as consisting of the employed hot joining property composite fibre (B) among the present invention can preferably use Noblen or polyethylene terephthalate.The just not melting and keep the form of fiber in the step of heat treatment (2) of the fusing point of the resinous principle that described fusing point is high, when becoming nonwoven fabric, improve the viewpoint of the rigidity of nonwoven fabric, preferably have the high fusing point more than 20 ℃ of fusing point of the resinous principle minimum than described fusing point.Therefore, when the high resinous principle of described fusing point was Noblen or polyethylene terephthalate, its fusing point was preferred more than 158 ℃.
The high resinous principle of fusing point as consisting of the employed hot joining property composite fibre (B) among the present invention can utilize Noblen.Noblen can be by the general acquisitions such as Ziegler-Natta catalyst.In addition, as long as damage indistinctively effect of the present invention, then also can be as with ethylene-propylene random copolymer, ethylene-propylene-butene-1 random copolymer and propene-1-butene-1 random copolymer of the copolymer of a small amount of ethene and/or butene-1.
At the hot joining property composite fibre (B) in heat treatment (1), has the less heat-shrinkable of heat-shrinkable than heat-shrinkable composite fibre (A), perhaps be under this condition of non-thermal contraction, the complex morphological of the resinous principle that the low-melting resinous principle of the hot joining property the composite fibre (B) among the present invention and fusing point are high can adopt the structure of concentric sheath core pattern, eccentric sheath core pattern, parallel type etc.Just at the hot joining property composite fibre (B) in heat treatment (1), manifest than under less this condition of heat-shrinkable of the heat-shrinkable of heat-shrinkable composite fibre (A), the spiral helicine viewpoint of crispaturaing and becoming and manifesting easily, preferably low-melting composition is configured in the eccentric sheath core pattern of sheath side, and then, for the solid that makes screw type is crispaturaed easier manifesting, the part of the resinous principle that more preferably fusing point is high is exposed the form to fiber surface.
In addition, the Area Ratio of the resinous principle that the low-melting resinous principle of the hot joining property composite fibre (B) and fusing point are high, namely, with the sheath composition of fiber on the section that the direction cutting with fiber axis direction quadrature forms (for example, when the hot joining property composite fibre (B) is the sheath core type composite fiber, low-melting resinous principle) with the scope of the Area Ratio preferred 30/70～70/30 of core composition (resinous principle that fusing point is high), more preferably 40/60～60/40 scope.And then, have outspoken nature in order to make the hot joining property composite fibre (B), more preferably improve the ratio of the high resinous principle of fusing point, and make the high resinous principle of low-melting resinous principle and fusing point become 50/50～40/60 scope.If the resinous principle that the low-melting resinous principle of the hot joining property composite fibre (B) and fusing point are high is in 30/70～70/30 the scope, then the balance of the retractility of nonwoven fabric and the intensity when flexible is good, can keep both performances.
With the mensuration of the percent thermal shrinkage of described heat-shrinkable composite fibre (A) similarly, with regard to the viewpoint that intensity when making the nonwoven fabric that obtains flexible manifests effectively, preferably will use separately the hot joining property composite fibre (B) and the weight per unit area by the carding machine made to be 200g/m
2The comb and parallel cotton fibers prior to spinning lamellar cut into vertical 25cm * horizontal 25cm, then utilize air drier, under 145 ℃, carry out heat treatment in 5 minutes, then place cooling, and measure the length of MD direction and the percent thermal shrinkage that obtains is below 10%.
Among the present invention, in the step of heat treatment (2), the hot joining property composite fibre (B) manifests the hot joining property, but for following between reinforcing fiber, in this step, does not get rid of heat-shrinkable composite fibre (A) and also manifest the hot joining property.But, if manifesting of the hot joining property that is produced by heat-shrinkable composite fibre (A) is strong, then integrated securely between fiber, therefore becomes and lose easily retractility.In order to have the better balance of retractility and the intensity when flexible, preferably with respect among the resinous principle that consists of the hot joining property composite fibre (B), the fusing point of the resinous principle that fusing point is minimum, consist of among the resinous principle of heat-shrinkable composite fibre (A), the fusing point of the resinous principle that fusing point is minimum surpasses its 7 ℃ and low unlike it, more preferably surpasses its 5 ℃ and low unlike it.
Below the step of employed heat-shrinkable composite fibre (A) and the hot joining property composite fibre (B) among the present invention is made in expression.The mode that forms at least a portion of fiber surface with low-melting resinous principle use parallel type spinning mouth or with low-melting composition as sheath composition and composition that fusing point is high sheath core pattern spinning mouth or the eccentric sheath core pattern spinning mouth as the core composition, spin thermoplastic resin by common employed melt spinning machine, and utilize recycling machine to reclaim.At this moment, by quenching to blowing under the spinning mouth, with the thermoplastic resin cooling of semi-molten state, can make thus the not composite fibre of extension state.At this moment, the spray volume of at random setting the thermoplastic resin of melting reaches the recovery speed of extending silk, and making with respect to the target fiber number is the not extension silk in the fiber footpath about 1 times～5 times.
The not extension silk that obtains extends by common employed elongator, can be made into thus to extend silk (composite fibre before the processing of crispaturaing).Moreover, in normal circumstances, be heated between 40 ℃～120 ℃ the roller and roller, implement to extend and process so that the velocity ratio between roller becomes the mode of the scope of 1:1～1:5.Optionally, utilize the processing machine of crispaturaing of box that the extension silk that obtains is given and crispatura to form tow.
Attachment steps about fibre finish, the method of adhering to by kiss roll (kiss roll) when not extending the recovery of silk is arranged or when extending and/or extend rear method of adhering to by touch roll method, infusion process, spray-on process etc., adhere to by at least a step of these methods.With chopper and in conjunction with purposes this tow being cut into arbitrarily fibre length uses.
With the heat-shrinkable composite fibre (A) that obtains in this way and the hot joining property composite fibre (B) with (A): (B)=quality ratio of 90:10～60:40 mixes equably and obtain lamellar.
The making of lamellar can be used the known devices such as carding machine, random loom, is undertaken by conventional method.So, can obtain to comprise equably heat-shrinkable composite fibre (A) the 90 quality % that use at least 2 kinds of different resinous principles of fusing point to obtain～60 quality %, and the lamellar that the hot joining property composite fibre (B) 10 quality %～40 quality % form that uses at least 2 kinds of different resinous principles of fusing point to obtain.
Among than the resinous principle that consists of heat-shrinkable composite fibre (A), under the lower temperature of the fusing point of the resinous principle that fusing point is minimum, the lamellar that obtains is in this way implemented heat treatment (1) and made heat-shrinkable composite fibre (A) thermal contraction, then among the resinous principle than the formation hot joining property composite fibre (B), the softening point of the resinous principle that fusing point is minimum is high 5 ℃～10 ℃ temperature under, described lamellar is implemented heat treatment (2), and hot joining between fiber in the minimum resinous principle melting of this fusing point, thereby make its joint integrated.
Also can consider following method: in heat treatment (1), only heat-shrinkable composite fibre (A) is heat-treated, the heat-shrinkable composite fibre (A) that then will be somebody's turn to do through thermal contraction mixes with the hot joining property composite fibre (B), obtains nonwoven fabric by heat treatment (2).But, in the method, in heat treatment (1) heat-shrinkable composite fibre (A) each other reason manifest and spiral helicinely crispatura caused thermal contraction and intricately is twined mutually, even if therefore the hot joining property composite fibre (B) is blended in the heat-shrinkable composite fibre (A) of this state, also be difficult to make each fiber to disperse equably, and can't obtain sufficient retractility.In addition, when utilizing carding machine etc. to make lamellar, the heat-shrinkable composite fibre (A) of crispaturaing in the shape of a spiral is subject to excessive stress and is elongated, and also becomes thus the reason of the hydraulic performance decline that makes retractility.
Therefore, at first will be not do not mix to make lamellar (this lamellar be heat-shrinkable composite fibre (A) is mixed equably with the hot joining property composite fibre (B) and comprise equably both) by heat the heat-shrinkable composite fibre (A) of processing and the hot joining property the composite fibre (B) of not processing by heat.Thereafter, in heat treatment (1), make heat-shrinkable composite fibre (A) thermal contraction in the lamellar, spiral helicine crispaturaing manifested, then, the hot joining property composite fibre (B) hot joining in the lamellar, and it is integrated that fiber is closed indirectly.The nonwoven fabric that obtains by the heat-shrinkable composite fibre (A) of crispaturaing in the shape of a spiral between between the fiber through engaging or between the grid of fiber, and more effectively manifest the effect of so-called spring-like, therefore can not damage feel or the uniformity of nonwoven fabric, and unprecedented retractility reaches the balance excellence of the intensity when stretching.
As the heat treated concrete form for described lamellar, the form that can be listed below.Among than the resinous principle that consists of heat-shrinkable composite fibre (A), heat-treat (1) under the temperature that the fusing point of the resinous principle that fusing point is minimum is low 5 ℃～20 ℃, make first thus heat-shrinkable composite fibre (A) thermal contraction.Crispatura in the shape of a spiral by heat-shrinkable composite fibre (A) thermal contraction is manifested.This heat treatment (1) can be undertaken by known devices such as infrared heating, air drier, warm-up mills.Utilize identical device, among than the resinous principle that consists of the hot joining property composite fibre (B), the softening point of the resinous principle that fusing point is minimum is high 5 ℃～lamellar that thermal contraction is manifested form heat-treated under 10 ℃ the temperature, to make fiber indirectly to close integrated for the hot joining of the low-melting resinous principle by the hot joining property composite fibre (B) thus, can make thus the flexible nonwoven fabrics as target.
Embodiment 1
Secondly, specifically describe the present invention by example, but the present invention not only is defined in following example.Moreover the definition of employed term and assay method are as described below in example, the comparative example.
(1) fusing point softening point: (unit: ℃)
The differential scanning calorimetry DSC-Q10 that utilizes TA Instruments to make, the corresponding temperature of crest on the melting absorption curve that will be obtained when thermoplastic polymer is heated up is made as the fusing point of this thermoplastic polymer, following extrapolation is melted the beginning temperature is made as softening point, this extrapolation melt beginning temperature be to the tangent line drawn in the some place of the maximum inclination that erects part of this crest, and crest before the extrapolate temperature of the intersection point that obtains of baseline.
(2) fiber number: (unit: dtex)
Measure according to JIS L 1015.
(3) melt flow rate (MFR) (Melt Flow Rate, MFR): (unit: g/10min)
According to JIS K7210(230 ℃, 21.18N) measure.MFR is the value of thermoplastic polymer being measured gained as sample.
(4) percent thermal shrinkage
To use separately heat-shrinkable composite fibre (A) or the hot joining property composite fibre (B), and the weight per unit area of the Small Sized Carding Machines made by large and machine worker manufacturing is 200g/m
2The comb and parallel cotton fibers prior to spinning lamellar cut into vertical 25cm * horizontal 25cm, then utilize air drier, under 145 ℃, carry out heat treatment in 5 minutes., place cooling, and measure the length cm(X of MD direction thereafter), then calculate percent thermal shrinkage according to (1) formula.
((25-X)/25) * 100=percent thermal shrinkage (%) ... (1) formula
(5) elongation recovery rate and TENSILE STRENGTH
So that length direction becomes the mode of MD direction, from the nonwoven fabric of made, cut out long 150mm, the test film of wide 25mm, the cupping machine Autograph AGS-J that uses Shimadzu Seisakusho Ltd. to make, following action is repeated 10 times continuously, namely with 100mm between chuck, draw speed 300mm/min stretches until tensile elongation becomes till 50%, then revert at once 100mm between chuck, measure ultimate tensile strength (stretch 50% time intensity) for each drawing numbers and revert to 0 percentage elongation (L) with TENSILE STRENGTH, and calculate the elongation recovery rate according to (2) formula.Obtain the 10th time elongation recovery rate and ultimate tensile strength (the intensity 50% time of stretching, unit is N).
((50-L)/50) * 100=elongation recovery rate (%) (2) formula
(6) texture
For the texture of the nonwoven fabric of made, carry out visual judgement with the benchmark of 3 following grades.
Well (zero): produce equably thermal contraction, obtained the good nonwoven fabric of texture
Very (Δ): roughly produce equably thermal contraction, slightly see the uneven of texture
Bad (*): thermal contraction does not produce equably and has the uneven of texture
Fibre morphology and the manufacture method of employed heat-shrinkable composite fibre and the hot joining property composite fibre are shown in table 1, table 2.
(1) will be shown in table 1 as heat-shrinkable composite fibre-1 and the heat-shrinkable composite fibre-2 of heat-shrinkable composite fibre of the present invention (A).As shown in table 1, use 2 kinds of different resinous principles of fusing point, and utilize possess extruder, the aperture is the device for spinning of the parallel type spinning mouth of 0.8mm, recycling machine, batching apparatus etc., and possess multistage heating roller and the extension apparatus of clogging box crimper (can fix the shape of crispaturaing by steam), make under the conditions shown in Table 1 each heat-shrinkable composite fibre.
(2) will be shown in table 2 as the hot joining property the composite fibre of the hot joining property composite fibre of the present invention (B)-1～hot joining property composite fibre-3.As shown in table 2, use 2 kinds of different resinous principles of fusing point, and utilize possess extruder, the aperture is the device for spinning of the eccentric sheath core pattern spinning mouth of 0.8mm, recycling machine, batching apparatus etc., and possess multistage heating roller and the extension apparatus of clogging box crimper (can fix the shape of crispaturaing by steam), make under the conditions shown in Table 2 each the hot joining property composite fibre.
Embodiment 1
Heat-shrinkable composite fibre-1 shown in table 1, the table 2 is mixed with the ratio of the hot joining property composite fibre-1 with the blending ratio 75/25 shown in the table 3, utilize Small Sized Carding Machines production unit area weight large and that the machine worker makes to be 25g/m
2Lamellar, as heat treatment (1), by air drier, at 120 ℃ design temperatures, mean wind speed 0.8m/sec, process time 12sec condition under, heat-shrinkable composite fibre-1 is manifested by producing the spiral helicine caused contraction of crispaturaing.Then, as heat treatment (2), similarly by air drier, under the condition of 130 ℃ design temperatures, mean wind speed 0.8m/sec, process time 12sec, the hot joining that utilizes hot joining composite fibre-1 and is made and engaged integrated nonwoven fabric between fiber.
About manifesting by heat treatment (1), heat treatment (2) caused phenomenon, utilize scanning electronic microscope (Scanning Electron Microscope, SEM) sample after each heat treatment end is observed, the result is after heat treatment (1), confirm to have produced the heat-shrinkable composite fibre spiral helicine crispatura and do not produce interfibrous hot joining, after heat treatment (2), confirm the interfibrous hot joining that in heat treatment (1), does not obtain confirming and.
Use as above as the nonwoven fabric made, confirm as described the texture of nonwoven fabric, and the intensity when utilizing stretching test machine determination elongation recovery rate, elongation.
Example 2～example 7, comparative example 1～comparative example 5
Except the temperature of the combination that changes to the heat-shrinkable composite fibre shown in the table 3 and heat-shrinkable composite fibre and blending ratio, heat treatment (1), heat treatment (2), make nonwoven fabric with the method identical with example 1, and the intensity when measuring elongation recovery rate, elongation.
[table 1]
[table 2]
[table 3]
As according to the result of example 1～example 7 and as clear and definite, the texture of flexible nonwoven fabrics of the present invention is good, when having carried out repeat pull, the balance excellence of the intensity of its elongation recovery rate during with the 10th time elongation 50%.
With respect to this, when not using the hot joining property composite fibre as comparative example 1, although the elongation recovery rate is good, the intensity during the 10th time elongation is extremely low, the balanced differences of the intensity of elongation recovery rate during with elongation.
In comparative example 2, comparative example 3, if the excess Temperature of heat treatment (2), heat treatment (1), although then the intensity during the 10th time elongation 50% uprises, texture or elongation recovery rate descend.
In comparative example 4, if the blending ratio of heat-shrinkable composite fibre is excessively low, then the intensity during the 10th time elongation 50% descends.Its reason is: the blending ratio by the hot joining property composite fibre uprises, the interfibrous abutment that produces by hot joining increases, in the starting stage of repeat pull, intensity when extending 50% shows high value, but because repeating the multi-drawing test, interfibrous abutment is destroyed, the intensity step-down during the 10th time elongation 50%.
Comparative example 5 is except using heat-shrinkable composite fibre-2, and increases beyond the fiber number of the hot joining property composite fibre, and is identical with comparative example 2, no matter but fiber number, if the excess Temperature of heat treatment (2) then becomes the result identical with comparative example 2.
Utilizability on the industry
The elongation recovery rate of the repetition of nonwoven fabric of the present invention is excellent with the balance of the intensity in when elongation, even if repeat to stretch, and the high strength when also keeping elongation, and can be used as the base fabric, bandage, supporter etc. of ear-hang member, the cataplasm of disposable breathing mask.In addition, this retractility also has as elastomeric effect, by additional this kind effect in previous purposes, can make its multifunction.
Claims (4)
1. flexible nonwoven fabrics is characterized in that:
Comprise equably heat-shrinkable composite fibre (A) the 90 quality % that use at least 2 kinds of different resinous principles of fusing point to obtain～60 quality %, and the lamellar that the hot joining property composite fibre (B) 10 quality %～40 quality % form that uses at least 2 kinds of different resinous principles of fusing point to obtain, by the heat treatment (1) under the lower temperature of the fusing point of the minimum resinous principle of fusing point among than the resinous principle that consists of described heat-shrinkable composite fibre (A), and after making described heat-shrinkable composite fibre (A) thermal contraction, softening point by the minimum resinous principle of fusing point among than the resinous principle that consists of the described hot joining property composite fibre (B) is high 5 ℃～heat treatment (2) under 10 ℃ the temperature, and hot joining between fiber in the minimum resinous principle melting of this fusing point, engage thus integrated.
2. flexible nonwoven fabrics according to claim 1 is characterized in that:
Described heat-shrinkable composite fibre (A) comprise Noblen or Ethylene-Propylene Block Copolymer and be selected from ethene and alpha-olefin in a kind or 2 kinds of alkene-random copolymer of propylene with propylene, the described hot joining property composite fibre (B) comprises Noblen or polyethylene terephthalate, and Alathon.
3. flexible nonwoven fabrics according to claim 1 and 2 is characterized in that:
Described heat-shrinkable composite fibre (A) is the eccentric sheath core pattern that the resinous principle that fusing point is minimum is configured in the sheath side, and this resinous principle accounts for 30%～95% of fiber surface.
4. the manufacture method of a flexible nonwoven fabrics is characterized in that comprising the steps:
With the heat-shrinkable composite fibre (A) that uses at least 2 kinds of different resinous principles of fusing point to obtain, and use the hot joining property composite fibre (B) that at least 2 kinds of different resinous principles of fusing point obtain with (A): (B)=quality ratio of 90:10～60:40 mixes equably and obtains lamellar, under the lower temperature of the fusing point of the resinous principle that fusing point is minimum among than the resinous principle that consists of described heat-shrinkable composite fibre (A) this lamellar is implemented heat treatment (1), and make described heat-shrinkable composite fibre (A) thermal contraction, the softening point of the resinous principle that fusing point is minimum among than the resinous principle that consists of the described hot joining property composite fibre (B) then is high 5 ℃～10 ℃ temperature under, described lamellar is implemented heat treatment (2), and hot joining between fiber in the minimum resinous principle melting of this fusing point, engage thus integrated.
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| JP2011-154317 | 2011-07-12 | ||
| JP2011154317A JP5831840B2 (en) | 2011-07-12 | 2011-07-12 | Stretchable nonwoven fabric and method for producing the same |
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| CN102877217A true CN102877217A (en) | 2013-01-16 |
| CN102877217B CN102877217B (en) | 2016-08-03 |
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| JP (1) | JP5831840B2 (en) |
| KR (1) | KR101957273B1 (en) |
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| CN104960290A (en) * | 2015-06-30 | 2015-10-07 | 怀宁县鑫源无纺布有限公司 | Preparation method of composite elastic nonwoven fabric |
| CN105518196B (en) * | 2013-09-06 | 2017-02-08 | 三井化学株式会社 | Nonwoven fabric laminate for foaming molding, method for producing nonwoven fabric laminate for foaming molding, urethane foaming molding composite, vehicle seat, and chair |
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Also Published As
| Publication number | Publication date |
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| JP2013019076A (en) | 2013-01-31 |
| KR20130008477A (en) | 2013-01-22 |
| KR101957273B1 (en) | 2019-03-12 |
| TW201303104A (en) | 2013-01-16 |
| CN102877217B (en) | 2016-08-03 |
| JP5831840B2 (en) | 2015-12-09 |
| TWI573906B (en) | 2017-03-11 |
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