CN1195040A - Heat-fusible composite fiber, and non-woven fabrics and absorbent products produced from same - Google Patents
Heat-fusible composite fiber, and non-woven fabrics and absorbent products produced from same Download PDFInfo
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- CN1195040A CN1195040A CN98105650A CN98105650A CN1195040A CN 1195040 A CN1195040 A CN 1195040A CN 98105650 A CN98105650 A CN 98105650A CN 98105650 A CN98105650 A CN 98105650A CN 1195040 A CN1195040 A CN 1195040A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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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
- 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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; 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
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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
Abstract
There are disclosed a heat-fusible composite fiber comprising a component A consisting of a high-melting-point, crystalline polypropylene resin, and a component B consisting of at least one low-melting-point resin selected from propylene-based copolymers having a melting point lower than that of the component A, characterized in that the cross-section of said composite fiber has a profiled structure wherein the component A consisting of the high-melting-point resin forms branch portions of strands radially extending from the center portion outward, and the component B consisting of the low-melting-point resin forms projecting portions connected to the branch portions, and a non-woven fabric and absorbent products produced from such a fiber.
Description
The present invention relates to have the heat-fusible composite fiber of odd-shaped cross section and nonwoven fabric and the absorbent article of making by this composite fibre.Particularly, the present invention relates to polyolefin-based (produce nonwoven fabric and need low heat treatment temperature) with odd-shaped cross section and heat-fusible composite fiber with excellent covering; And relate to nonwoven fabric and the absorbent article of producing by this composite fibre.
By as the low-melting-point resin of skin composition and the nonwoven fabric produced as the resin with high melting point of core composition, because their for example feel (sense of touch) and nonwoven toughness and accepted well, and be widely used as for example surfacing of paper nappy and sanitary napkin of health product.When producing with staple fibre, this nonwoven fabric typically by combing or air-flow shredding, is processed into net with heat-fusible composite fiber, use heat and pressure fusion skin composition then, and the binder fiber mixing point is produced.
Under the contrast, typical nonwoven fabric is easy to produce with long fiber by spun-bond process.Typically introduced in an air suction pipe and the analog from the long fiber of spinning head ejection, stretch and also elongate, shredding is collected on the conveyer and is processed into net, uses heat and pressure with the fusion of skin composition then, and the mixed with fibers point is bonded together.
The processing of binder fiber mixing point is broadly divided into the pressure sintering of using the heat embossing roller and the hot blast adhesion method of using air-breathing band drier or air-breathing heated drum.The nonwoven fabric of being produced by these methods is called a bonded nonwoven and ventilative nonwoven fabric, and should be used for using these appellations according to them.
This fiber that is called hot melt (Pi Hexin) composite fibre comprises, the composite fibre that constitutes by high density polyethylene (HDPE)/polypropylene (hereinafter referred to as HDPE/PP) for example, the composite fibre (hereinafter referred to as HDPE/PET) that constitutes by high density polyethylene (HDPE)/polyester, with the composite fibre (hereinafter referred to as co-PP/PP) that becomes branch to constitute as the skin composition and by polypropylene as core by the polyvinyl copolymer, as disclosed in Japanese patent application No.55-26203 and Japanese Patent Application Publication Nos.2-91217 and 2-191720.
In these fibers because co-PP/PP contains the propylene composition at the resin of forming skin and the resin of forming core in the two, so exists strong affinity in skin and the core component, with HDPE/PP and HDPE/PET relatively, skin and core do not have the tendency of layering.In addition, with respect to HDPE, since with the welding ability of other resin on, co-PP in the crust composition is superior, so, be subjected to very high praise owing to their high strength by the nonwoven fabric of co-PP/PP base heat-fusible composite fiber production when when together being processed into paper nappy or other health product with the nonwoven fabric of other production of resins or film.
When producing nonwoven fabric with heat-fusible composite fiber, the feel of nonwoven fabric (sense of touch) is inharmonic with its toughness.As usual, because the nonwoven fabric that requires to be used for hygienic material has enough toughness and fast as far as possible speed of production, often produce them by heat treatment under higher relatively temperature.But, as recent tendency, require to have soft hand feeling (sense of touch) as the nonwoven fabric of health product surfacing.Therefore, through lower temperature commonly used the nonwoven fabric of producing with co-PP/PP is heat-treated, this just produces a problem, and promptly nonwoven fabric has lower toughness.
Therefore, require exploitation can satisfy the co-PP/PP that is used to produce nonwoven fabric of high tenacity and these two contradictions requirements of soft feel (sense of touch).
The nonwoven fabric that is used for surfacing, for example, those are used to make the nonwoven fabric of disposable diaper and sanitary napkin, can stay the yellow strain vestige or stay the red vestige that pollutes through discharging because of woman month because of infant faeces or urine.Because these vestiges have a significant impact the comfortableness of using, therefore, to up-to-date surfacing, covering promptly shows the function that this pollution is difficult for seeing, is essential.For this reason, the method that is used for improving traditional nonwoven fabric covering comprises by add for example TiO of pigment at the fiber that constitutes nonwoven fabric
2Improve whiteness.But, if TiO
2Or the addition of analog is too much, though whiteness has improved, the spinnability of fiber and the processability of nonwoven fabric have reduced, and long fiber is cut into product become difficult, and production prices can improve.To the greatest extent the possessor has also advised a kind of method, and the weight that promptly improves per unit area to be improving covering, but is reducing weight, the production cost aspect of size and nonwoven fabric, and this method has run into difficulty.
The purpose of this invention is to provide composite fibre with odd-shaped cross section, in addition this composite fibre of heat treatment at low temperature and at a high speed, also can be processed into nonwoven fabric with high strength and soft feel, this composite fibre has good weldability and good covering.
The present inventor has carried out test repeatedly to addressing the above problem, and finds to use the heat-fusible composite fiber with following compositions to achieve the above object.
According to a first aspect of the invention, a kind of heat-fusible composite fiber is provided, this heat-fusible composite fiber contains by high-melting-point, the component A that crystalline acrylic resin constitutes, with contain the B component that constitutes by at least a low-melting-point resin that is selected from propylene-based copolymer with the fusing point that is lower than component A, the cross section that it is characterized in that described composite fibre has polymorphic structure, wherein the component A that is made of resin with high melting point forms the silk section branch part that radially outward from central division stretches out, and forms the protuberance that is connected on the branch part by the B component that low-melting-point resin constitutes.
According to a second aspect of the invention, provide a kind of heat-fusible composite fiber according to first aspect, wherein the propylene-based copolymer component is the bipolymer that comprises the ethene of the propylene of percentage by weight 85-99% and percentage by weight 1-15%.
According to a third aspect of the invention we, provide a kind of heat-fusible composite fiber according to first aspect, wherein the propylene-based copolymer component is the bipolymer that comprises the butene-1 of the propylene of percentage by weight 50-99% and percentage by weight 1-50%.
According to a forth aspect of the invention, a kind of heat-fusible composite fiber according to first aspect is provided, wherein the propylene-based copolymer component is the propylene that comprises percentage by weight 84-98%, the terpolymer of the butene-1 of the ethene of percentage by weight 1-10% and percentage by weight 1-15%.
According to a fifth aspect of the invention, provide a kind of staple fiber nonwoven fabric that is formed by the heat-fusible composite fiber of the either side in first to fourth aspect, its crosspoint is thermal welding.
According to a sixth aspect of the invention, provide a kind of nonwoven fabric of long fibers that is formed by the heat-fusible composite fiber of the either side in first to fourth aspect, its crosspoint is thermal welding.
According to a seventh aspect of the invention, provide a kind of absorption product, its at least a portion is by according to the nonwoven production of the 5th or the 6th aspect.
To be described in detail the present invention below.
The crystalline polypropylene of a kind of resin with high melting point that uses among the present invention as the component A of heat-fusible composite fiber is the homopolymers of propylene, or as the propylene of main component and the crystalline copolymer of a spot of alpha-olefin, described alpha-olefin is an ethene for example, butene-1, hexene-1, octene-1 and 4-methylpentene-1, and (230 ℃ is that 2-150 and fusing point are 158 ℃ or above alpha-olefin 2.16kg) preferably to have MFR.This polymer is to make with the known method of the skilled person in this area, for example the propylene polymerization that causes with Ziegler-Natta catalyst.
Also be used as the propylene-based copolymer of low-melting-point resin among the present invention as the heat-fusible composite fiber B component, be as the propylene of main component and the crystalline copolymer of a spot of alpha-olefin, described alpha-olefin is an ethene for example, butene-1, hexene-1, octene-1, with 4-methylpentene-1, and (230 ℃ be that 3-50 and fusing point are 120-158 ℃ 2.16kg), and its fusing point is lower than the alpha-olefin as the crystalline polyacrylic fusing point of component A preferably to have MFR.In a preference, propylene-based copolymer is the propenyl propylene-ethylene bipolymer that contains the ethene of the propylene of percentage by weight 85-99% and percentage by weight 1-15%, contain the propenyl propene-1-butene bipolymer of the butene-1 of the propylene of percentage by weight 50-99% and percentage by weight 1-50%, or contain the terpolymer of propylene-ethylene-butene-1 of the butene-1 of the ethene of the propylene of percentage by weight 84-98% and percentage by weight 1-10% and percentage by weight 1-15%.This copolymer is to make with the known method of the skilled person in this area, for example the alpha-olefinic copolymerization reaction that causes with Ziegler-Natta catalyst.
If the weight percent content of the arbitrary comonomer in the copolymer (ethene and butene-1) is less than 1%, the product fiber will lack hot melt.If the fusing point of copolymer is higher or lower than above-mentioned scope, the process velocity of nonwoven fabric, the balance between toughness and the feel will become to worsening.The cross section of heat-fusible composite fiber of the present invention has polymorphic structure, wherein the component A that is made of resin with high melting point forms the branch part of the silk section that radially outward from central division stretches out, and forms the protuberance that is connected on the branch part by the B component that low-melting-point resin constitutes.
In the process, if constitute the low-melting-point resin component generation layering of heat-fusible composite fiber, the quantity of heat-bondable fiber mixing point will reduce, and cause poor bonding.Particularly, because composite fibre of the present invention has the cross section of polymorphic structure, be easy to layering, therefore, the resin Composition A of formation composite fibre and the combination of B are just very important.In particular, must have affinity between resin Composition A and the B, even the external force of applying, they can not separate.Fig. 1 provides example according to the cross section of meldable fibre of the present invention to Fig. 4.But, the cross section of fiber described below is not intended to limit the present invention.
Heat-fusible composite fiber shown in Figure 1 (a1) is a kind of composite fibre, wherein the component A that is made of resin with high melting point (1) forms the branch part of three silk sections that radially outward from central division stretches out, and low-melting-point resin B component (2) forms protuberance,, stretch out along extended line vertically from each section end of branch part.
Heat-fusible composite fiber shown in Figure 2 (a2) is a kind of composite fibre, wherein resin with high melting point component A (1) forms the branch part of four silk sections that radially outward from central division stretches out, and low-melting-point resin B component (2) forms protuberance,, stretch out along extended line vertically from each section end of branch part.
Heat-fusible composite fiber shown in Figure 3 (a3) is a kind of composite fibre, wherein the component A that is made of resin with high melting point (1) forms the branch part of four silk sections that radially outward from central division stretches out, and low-melting-point resin B component (2) forms two protuberances, along the opposite direction of traversed by silk section line, near each section tail end, stretch out.(in this example, direction is perpendicular to the silk section, but can adopt any angle of cut.This principle also can be used for following description.) in this example, a protuberance is to stretch out from a position of very approaching silk section tail end, and another protuberance is to stretch out from the position of the root that approaches the silk section a little.But, two protuberances can opposite substantially direction stretch out from essentially identical position.
Heat-fusible composite fiber shown in Figure 4 (a4) is a kind of composite fibre, wherein the component A that is made of resin with high melting point (1) forms the branch part of four silk sections that radially outward from central division stretches out, and form two protuberances by the B component (2) that low-melting-point resin constitutes, along the opposite direction of traversed by silk section line, near each section tail end, stretch out.(direction favours the silk section a little in this example.)
Shown in above-mentioned Fig. 1-4, heat-fusible composite fiber of the present invention has unique odd-shaped cross section structure.In other words, outwards protrude, form dendritic skeleton, and partly be connected to the branch part of component A, form protuberance by the B component that low-melting-point resin constitutes as the component A that constitutes by resin with high melting point of fine filaments section.Like this, B component has very meticulous protuberance, and except the part that is connected with said components A, its surface exposes.
When the composite fibre that will have this shape and structure in addition during heat treatment, the exposed surface transmission of the B component that heat is made of low-melting-point resin when it becomes molten state by limp state, impels heat to be delivered to B component.
Particularly, because the exposed surface area of low-melting-point resin (B component) is with respect to the percentage of volume, than big many of the common sheath-core type fiber with circular cross section shown in Figure 5 and the corresponding ratio of other fiber, heat easily obtains uniform fusion from the exposed surface transmission.In other words, aspect low temperature adhesion, fiber of the present invention is superior.
When the meticulous more and exposed surface of the protuberance of B component is big more, this effect is just obvious more.
As the object of the invention, good bonding under the low temperature means that meldable fibre of the present invention can heat bonding equably under the temperature than the temperature required low 3-4 of standard composite fibre heat bonding with circular cross section shown in Figure 5 ℃, and under these conditions, can not produce uneven connection mixed with fibers point.
As a result, have space between a large amount of fibers, and therefore have very soft hand feeling by the nonwoven fabric of heat treatment heat-fusible composite fiber production of the present invention at low temperatures.In addition, because fiber is put heat bonding securely in mixed with fibers, during mixed with fibers, the product nonwoven fabric has improved bonding force and high toughness.
Compare with composite fibre of the present invention, the common sheath-core type composite fibre with circular cross section shown in Figure 5 need be enough to the higher temperature of its skin component of fusion.
Although under this condition, by heat fusing, the heat treatment of general fibre provides bigger toughness, because the temperature of core segment is near its fusing point, whole fiber all can fusion.The feel (soft feeling) that this causes the loss of volume inevitably and weakens nonwoven fabric.
Because heat-fusible composite fiber of the present invention has the multi-blade structure, wherein a silk section branch is radially therefrom outside the mind-set, can see the incident light of scattering and reflection in the visual field.
Therefore,, will be created in the following effect that is difficult to see color of this cloth, be called the resistance luminous effect when heat-fusible composite fiber of the present invention is processed to cloth for example nonwoven fabric and woven cloth.In other words, the covering power of heat-fusible composite fiber of the present invention is superior.
In order to produce the heat-fusible composite fiber of the present invention of staple fibre form, by adopting arbitrary known compound spinning method, use the spinnerets that has by the cross section of above-mentioned fiber cross section shape representative, with said components A and B spray silk, stretching and curling.The weight ratio of component A and B is preferably in 30/70 and 80/20 scope.Therefore if the content of B component is less than 20%, the Thermoadhesive of product fiber will reduce, and can damage toughness and low temperature adhesion that the nonwoven fabric of fiber production thus meets hope.If the content of B component surpasses 70%, when the product fiber was processed to nonwoven fabric, although Thermoadhesive is enough high, the thermal contraction meeting of fiber increased, and DIMENSIONAL STABILITY has the tendency of reduction.Consider that from favourable cardability the fineness of composite fibre is preferably 0.5-10.0d/f, the preferably about 3-60/25mm of crispation number.
In order to produce typical long fiber, adopt arbitrary known spray silk Method for bonding, use the spinnerets that has by the cross section of above-mentioned fibre section shape representative, with said components A and B spray silk.The weight ratio of component A and B is preferably in 30/70 and 80/20 scope.If the content of B component is less than 20%, the Thermoadhesive of product fiber will reduce, and can damage toughness and low temperature adhesion that the nonwoven fabric of fiber production thus meets hope like this.If the content of B component surpasses 70%, when the product fiber was processed to nonwoven fabric, although Thermoadhesive is enough high, the thermal contraction meeting of fiber increased, and DIMENSIONAL STABILITY has the tendency of reduction.The fineness of composite fibre is preferably 0.5-10.0d/f.When needs, can be with fiber crimp.
Staple fiber nonwoven fabric of the present invention can be produced with known method, the net that wherein has the weight per unit area (METSUKE) of requirement is produced by above-mentioned composite fibre with carding method, by using needle point method, drawing-in type drying machine method, or the hot rolling method, net is processed into nonwoven fabric successively.
Typical nonwoven fabric of long fibers can for example spray a Method for bonding production with known method.
These nonwoven fabric are useful to the surfacing of producing paper nappy or sanitary napkin.When these nonwoven fabric are used to produce paper nappy or sanitary napkin, the preferred 0.5-10.0d/f of monofilament fineness, the preferred 8-50g/m of the weight per unit area of nonwoven fabric (METSUKE)
2, more preferably 10-30g/m
2If monofilament fineness less than 0.5d/f, just is difficult to obtain stable spray silk, and is difficult to obtain uniform net; If monofilament fineness is greater than 10.0d/f, then the texture of nonwoven fabric will chap, although and this nonwoven fabric be used as the surfacing of health product, product will be out of favour because of having coarse and hard feel.If weight per unit area (METSUKE) is less than 8g/m
2, owing to became thin, nonwoven fabric just can not obtain enough toughness; If surpass 50g/m
2Although, possess favourable toughness, because bad feel and expensive, the nonwoven fabric no practicality that can become.
Preference
The present invention will be described in further detail by embodiment; But, the present invention can not be with it as restricted explanation.
The various physical characteristics of described relevant the following example are measured by using following method:
● shape of cross section retentivity (staple fibre)
After pulling out, 50 rhizoid lines are made sample, by light microscope its cross section are taken a picture, observe in the visual field by the odd-shaped cross section shape that contains junction between the B component that component A that resin with high melting point constitutes and low-melting-point resin constitute.When shape reservation amount is 90% or higher, shape retention is cited as excellent; When shape reservation amount is 80% or higher, shape retention is cited as very; Shape reservation amount is less than 80%, and shape retention is cited as poor.The shape retention measurement result is listed in table 1, and is wherein excellent, and good and difference is by zero, △ and * represent.
● shape of cross section retentivity (long fiber)
Take the nonwoven fabric cross section by light microscope, observe in the visual field not by the fiber of heat bonding and by the shape that contains the odd-shaped cross section of junction between the B component that component A that resin with high melting point constitutes and low-melting-point resin constitute.When shape reservation amount is 90% or higher, shape retention is cited as excellent; When shape reservation amount is 80% or higher, shape retention is cited as very; Shape reservation amount is less than 80%, and shape retention is cited as poor.The shape retention measurement result is listed in table 1, and is wherein excellent, and good and difference is by zero, △ and * represent.
● covering power (whiteness of net)
10 gram nets are made sample, and (SM Color Computer, Suga Testing Machine Co. Ltd.) measure whiteness with color difference meter.Higher value shows higher covering power.Table 1 is listed the covering power measurement result.
● covering power (contrast ratio of nonwoven fabric)
Use is for measuring the nonwoven test sample of toughness preparation.A white plaque and a black porcelain plate are placed in the back of specimen, measure brightness by color difference meter, calculate contrast ratio (Δ L) according to following equation.Lower contrast ratio shows higher covering power.Table 1 is listed the covering power measurement result.
Contrast ratio (Δ L)=L
*W-L
*B
Wherein
L
*W: the brightness when white plaque is placed on the nonwoven fabric back
L
*R: the brightness when black porcelain plate is placed on the nonwoven fabric back
● the toughness of nonwoven fabric
Prepare every block length 15cm, the specimen of wide 5cm, with one draw the toughness test machine folder mouthful apart from the condition of 10cm and draw speed 10cm/min under test draw toughness.
● the feel of nonwoven fabric
Carry out the feel test with 5 people that participate in the experiment, if it is " softness " that all people that participates in the experiment judge sample, the people that participates in the experiment more than 3 or 3 judges that sample is that " softness " and the people that participates in the experiment more than 3 or 3 judge that sample is " a shortage soft hand feeling ", then this sample is chosen as excellent, good and poor respectively.Excellent, good and difference is by zero, △ and * represent.
● weldability
Downcut this specimen from the nonwoven fabric that is used to test toughness, every sample is 7.5cm along the length of machine direction (MD), is 2.5cm along the width of machine movement method direction (CD).The nonwoven fabric of another piece from same type covered in one endlap of every sample, or from what prepare with polypropylene fibre (2d/f), weight per unit area (METSUKE) is about 20g/m
2The end of sample of the wide 2.5cm of long 7.5cm that downcuts of nonwoven fabric, imbrication amount 1cm is at predetermined temperature and 3kg/cm
2Under the pressure, with 3 seconds of imbrication sample thermal welding.Use tension tester, folder mouthful apart from the condition of 10cm and tension force speed 10cm/min under every sample thermal welding portion of test peel off toughness.
Embodiment 1, comparative example 1
By using compound spinning appts, this compound spinning appts is equipped with the spinnerets that has shown in Fig. 1 (embodiment 1) and Fig. 5 (comparative example 1) cross section that requires, and bipolymer and the MFR as component A that by the MFR as B component is the propylene of 15 butene-1 that contains percentage by weight 5% and percentage by weight 95% is that to produce weight ratio be that 40/60 (B component/component A) and monofilament fineness are the fiber that does not extend of 4d/f for 10 crystalline polypropylene (homopolymers).Then with hot rolling at 95 ℃ of elongate fibers that will not extend down 2.4 times to its original length, carry out machine crimp with stuffer box, 90 ℃ dry down, and be cut into the composite fibre of 2d * 38mm.To comprise that with being equipped with a metal back roll and has the heat pressure adhesive device of the knurling rolls that are heated to 120 ℃ (embodiment 1) or 124 ℃ (comparative examples 1) of 24% land area by the fiber web of carding machine production, at linear pressure is 20kg/cm, speed is heat treatment under the condition of 6m/min, produces weight per unit area (METSUKE) thus and is about 20g/m
2Nonwoven fabric.When these nonwoven fabric were used as the surfacing of adult diaper, the nonwoven fabric of embodiment 1 be superior in feel (soft feeling) and toughness and the thermal welding, and the nonwoven fabric of comparative example 1 had relatively poor relatively whiteness, toughness and thermal welding in whiteness.Therefore, be tangible to the adaptive difference that absorbs product.
The compound spinning appts of the spinnerets with the cross section that requires is equipped with in use shown in Fig. 3 (embodiment 2) and Fig. 4 (embodiment 3), except with MFR being 15 the ethene that contains percentage by weight 3%, the butene-1 of percentage by weight 5%, with the terpolymer of the propylene of percentage by weight 92% as B component, with be that 10 crystalline polypropylene (homopolymers) is as outside the component A, to produce the composite fibre of 2d * 38mm with the same way as of embodiment 1 with MFR.To comprise that with being equipped with a metal back roll and has the heat pressure adhesive device of the knurling rolls that are heated to 120 ℃ (embodiment 2 and 3) of 24% land area by the fiber web of carding machine production, at linear pressure is 20kg/cm, speed is heat treatment under the condition of 6m/min, produces heavy (METSUKE) the about 20g/m of unit are thus
2Nonwoven fabric.
Comparative example 2 and 3
The compound spinning appts of the spinnerets with the cross section that requires is equipped with in use shown in Fig. 1 (comparative example 2) and Fig. 5 (comparative example 3), except being that 19 high density polyethylene (HDPE) is as B component with MI, with be that 10 crystalline polypropylene (homopolymers) is as outside the component A, to produce the composite fibre of 2d * 38mm with the same way as of embodiment 1 with MFR.Except processing temperature is 124 ℃ (comparative examples 2) or 128 ℃ (comparative example 3), to produce nonwoven fabric by these composite fibres with the same way as of embodiment 1.Produce comparative example 2 products with the spinnerets identical, and used the resin Composition that surpasses the scope of the invention with the present invention.
Comparative example 4
The spinnerets of the cross section that requires as shown in Figure 2 is equipped with in use, except being that 0.65 poly-terephthalic acids second diester is as B component with the IV value, with be that 0.49 poly-terephthalic acids second diester is as outside the component A, to produce the composite fibre of 2d * 38mm with the same way as of embodiment 1 with the IV value.This composite fibre fails to judge, because after stretching, component A and B layering are also split.
Comparative example 5
The spinnerets with the cross section that requires as shown in Figure 1 is equipped with in use, except being that 19 high density polyethylene (HDPE) is as B component with MI, with be that 0.49 poly-terephthalic acids second diester is as outside the component A, to produce the composite fibre of 2d * 38mm with the same way as of embodiment 1 with IV.This composite fibre fails to judge, because after stretching, component A and B layering are also split.
Embodiment 4, comparative example 6
By the MFR as B component is the bipolymer of the propylene of 15 butene-1 that contains percentage by weight 5% and percentage by weight 95%; With MFR as component A be the composite fibre that 10 crystalline polypropylene (homopolymers) forms, from the spinnerets shown in Fig. 1 (embodiment 4) and Fig. 5 (comparative example 6), spray.The product fiber is introduced into air suction pipe and stretches and obtains long composite fibre.Give these long fiber chargings of discharging with electrical charger from air suction pipe, and allow it clash into and shredding along reflector panel, the long fiber of shredding is collected in its back as long fibre net to have on the ring network conveyer of getter device.The long fibre net of collecting is carried with pool conveyer, and with it with comprising that a metal back roll and has the hot-press arrangement that is heated to 120 ℃ knurling rolls of 24% land area, at linear pressure is 20kg/cm, and speed is that heat treatment forms heavy (METSUKE) the about 20g/m of unit are under the condition of 30m/min
2Nonwoven fabric.When these nonwoven fabric were used as the surfacing of adult diaper, although the whiteness of the nonwoven fabric of comparative example 6, toughness was all relative with hot melt relatively poor, and the nonwoven fabric of embodiment 4 is in whiteness, feel (soft feeling), and all be superior on toughness and the hot melt.Therefore, be tangible to the adaptive difference that absorbs product.
Toughness, feel, the contrast ratio of nonwoven fabric, and hot melt
Evaluation is cited as good (△) or better sample in the test of shape of cross section retentivity.In order to produce staple fiber nonwoven fabric, each fiber is all used the cylinder carding machine, with the speed combing of 20m/min, forms heavy (METSUKE) the about 20g/m of unit are
2Net.With the knurling rolls with 24% land area, under predetermined temperature, net is processed into nonwoven fabric successively.The character of these nonwoven fabric is listed in table 1.
As a comparison, produce nonwoven fabric of long fibers with spray silk Method for bonding.With the knurling rolls with 24% land area, under predetermined temperature, with heavy (METSUKE) the about 20g/m of unit are
2Net be processed into nonwoven fabric.The character of these nonwoven fabric is listed in table 1.
Table 1
| Resin combination | Fiber cross section | The shape of cross section retentivity | Covering | Nonwoven fabric character (CD toughness) | Covering | Thermal welding (1) | Thermal welding (2) | ||||||
| Component A/B | Whiteness | Processing temperature ℃ | ??Metsuke ???g/m 2 | Toughness g/5cm | Feel | Contrast ratio △ L | Temperature ℃ | Toughness g/2.5cm | Temperature ℃ | Toughness g/2.5cm | |||
| Embodiment 1 | ?PP-1/PO-1 | Fig. 1 | ????○ | ??93.5 | ????120 | ????20.5 | ????840 | ????○ | ????30.5 | ????135 | ????2050 | ???150 | ????1550 |
| Comparative example 1 | ?PP-1/PO-1 | Fig. 5 | ??90.0 | ????124 | ????21.3 | ????640 | ????△ | ????40.8 | ????140 | ????2000 | ???150 | ????1250 | |
| Embodiment 2 | ?PP-1/PO-2 | Fig. 3 | ????○ | ??94.0 | ????120 | ????20.2 | ????935 | ????○ | ????27.8 | ????135 | ????2430 | ???150 | ????1770 |
| Embodiment 3 | ?PP-1/PO-2 | Fig. 4 | ????○ | ??94.5 | ????120 | ????20.0 | ????900 | ????○ | ????27.5 | ????135 | ????2340 | ???150 | ????1700 |
| Comparative example 2 | ?PP-1/PE | Fig. 1 | ????△ | ??92.2 | ????124 | ????20.5 | ????460 | ????△ | ????30.2 | ????135 | ????1780 | ???155 | ????150 |
| Comparative example 3 | ?PP-1/PE | Fig. 5 | ??90.3 | ????128 | ????21.3 | ????800 | ????× | ????40.1 | ????130 | ????2100 | ???155 | ????140 | |
| Comparative example 4 | ?PET/PET | Fig. 1 | ????× | ??92.5 | After the elongation, component A/B separates in cross section, is not suitable for product | ||||||||
| Comparative example 5 | ?PET/PE | Fig. 2 | ????× | ??93.0 | |||||||||
| Embodiment 4 | ?PP-1/PO-1 | Fig. 1 | ????○ | ??93.0 | ????120 | ????20.0 | ????1200 | ????○ | ????31.5 | ????135 | ????2550 | ???150 | ????2300 |
| Comparative example 6 | ?PP-1/PO-1 | Fig. 5 | ??90.5 | ????120 | ????22.3 | ????900 | ????△ | ????38.7 | ????140 | ????2100 | ???150 | ????2000 | |
Commercial Application
Heat-fusible composite fiber with profiled cross-section according to the present invention can be processed into by the short time Low Temperature Heat Treatment nonwoven of high tenacity. Nonwoven with this heat-fusible composite fiber production has soft feel. In addition, good with the thermal welding of other polyolefin-based nonwoven, and covering power is high. As the surfacing of paper nappy and sanitary napkin, this nonwoven is useful.
The summary of legend
Fig. 1 is the sectional view of the heat-fusible composite fiber of the present invention of exemplary shapes.
Fig. 2 is the sectional view of the heat-fusible composite fiber of the present invention of another kind of exemplary shapes.
Fig. 3 is the cross-sectional view of the heat-fusible composite fiber of the present invention of another exemplary shapes.
Fig. 4 is the cross-sectional view of the heat-fusible composite fiber of the present invention of another exemplary shapes.
Fig. 5 is the cross sectional shape figure of the heat-fusible composite fiber of comparative example 1,3 and 6.
A1: heat-fusible composite fiber of the present invention
A2: heat-fusible composite fiber of the present invention
A3: heat-fusible composite fiber of the present invention
A4: heat-fusible composite fiber of the present invention
A5: comparative example 1,3 and 6 heat-fusible composite fiber
1: resin with high melting point (component A)
2: low-melting-point resin (B component)
Claims (7)
1. heat-fusible composite fiber, comprise the component A that constitutes by high-melting-point, crystalline acrylic resin, with contain the B component that constitutes by at least a low-melting-point resin that is selected from propylene-based copolymer with the fusing point that is lower than component A, the cross section that it is characterized in that described composite fibre has polymorphic structure, wherein the component A that is made of resin with high melting point forms the branch part of the silk section that radially outward from central division stretches out, and forms the protuberance that is connected on the branch part by the B component that low-melting-point resin constitutes.
2. according to the heat-fusible composite fiber of claim 1, wherein the propylene-based copolymer component is the bipolymer that comprises the ethene of the propylene of percentage by weight 85-99% and percentage by weight 1-15%.
3. according to the heat-fusible composite fiber of claim 1, wherein the propylene-based copolymer component is the bipolymer that comprises the butene-1 of the propylene of percentage by weight 50-99% and percentage by weight 1-50%.
4. according to the heat-fusible composite fiber of claim 1, wherein the propylene-based copolymer component is the propylene that comprises percentage by weight 84-98%, the terpolymer of the butene-1 of the ethene of percentage by weight 1-10% and percentage by weight 1-15%.
5. the staple fiber nonwoven fabric that is formed by each heat-fusible composite fiber of claim 1 to 4, its crosspoint is thermal welding.
6. the nonwoven fabric of long fibers that is formed by each heat-fusible composite fiber of claim 1 to 4, its crosspoint is thermal welding.
7. one kind absorbs product, and its part is by the nonwoven production of claim 5 or 6 at least.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21023/97 | 1997-01-20 | ||
| JP2102397 | 1997-01-20 | ||
| JP25925197A JP3741180B2 (en) | 1997-01-20 | 1997-09-08 | Thermal adhesive composite fiber, nonwoven fabric and absorbent article using the same |
| JP259251/97 | 1997-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1195040A true CN1195040A (en) | 1998-10-07 |
Family
ID=26358029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98105650A Pending CN1195040A (en) | 1997-01-20 | 1998-01-20 | Heat-fusible composite fiber, and non-woven fabrics and absorbent products produced from same |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0854213B1 (en) |
| JP (1) | JP3741180B2 (en) |
| CN (1) | CN1195040A (en) |
| DE (1) | DE69805664T2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000043594A1 (en) * | 1999-01-22 | 2000-07-27 | Sichuan Foreign Economic Relations & Trade Corporation | Synthetic fiber paper and the production process thereof |
| CN1128255C (en) * | 1997-07-28 | 2003-11-19 | 弗纳技术股份有限公司 | Isotactic polypropylene and syntiotactic polypropylent double-component fiber, making method and products thereof |
| CN102534863A (en) * | 2011-12-29 | 2012-07-04 | 江西国桥实业有限公司 | Double-component non-woven spinning and production method thereof |
| CN103882539A (en) * | 2013-12-04 | 2014-06-25 | 太仓荣文合成纤维有限公司 | Gray elastic fiber and preparing method thereof |
| CN105101927A (en) * | 2013-03-15 | 2015-11-25 | 宝洁公司 | Packages for articles of commerce |
| CN105636686A (en) * | 2013-10-09 | 2016-06-01 | 纯化迪发有限公司 | Chromatography medium |
| CN112281228A (en) * | 2020-09-10 | 2021-01-29 | 深圳市华远新材料有限公司 | Cross-shaped sheath-core structure polylactic acid tow and preparation method thereof |
| CN116590804A (en) * | 2023-07-17 | 2023-08-15 | 江苏新视界先进功能纤维创新中心有限公司 | Profiled fiber with multistage wicking structure and application of profiled fiber to geotextile |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3900680B2 (en) * | 1998-05-19 | 2007-04-04 | チッソ株式会社 | Thermal adhesive composite fiber, non-woven fabric and absorbent article using the same |
| FR2790489B1 (en) * | 1999-03-01 | 2001-04-20 | Freudenberg Carl Fa | TABLECLOTH NOT WOVEN IN THERMOLIA FILAMENTS OR FIBERS |
| ES2235855T3 (en) | 1999-04-15 | 2005-07-16 | Basell Poliolefine Italia S.P.A. | THERMALLY UNIBLE POLYOLEFIN FIBERS, WHICH CONTAIN A PROPYLENE RANDY COPOLYMER. |
| JP5854458B2 (en) * | 2011-09-30 | 2016-02-09 | ユニチカ株式会社 | Method for producing polyester long fiber nonwoven fabric |
| JP6099330B2 (en) * | 2012-08-02 | 2017-03-22 | 日本バイリーン株式会社 | filter |
| EP3127594B1 (en) | 2014-03-31 | 2018-11-28 | Unitika Ltd. | Air filter material |
| EP3174841A4 (en) | 2014-04-17 | 2018-05-16 | Basf Se | Combination of novel nitrification inhibitors and biopesticides as well as combination of (thio)phosphoric acid triamides and biopesticides |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6285025A (en) * | 1985-10-04 | 1987-04-18 | Nippon Ester Co Ltd | Hot-melt polyester conjugate yarn |
| JPS63295712A (en) * | 1987-02-16 | 1988-12-02 | Mitsubishi Rayon Co Ltd | Modified cross-section heat fusible fiber |
| JPH055261A (en) * | 1991-06-27 | 1993-01-14 | Oji Paper Co Ltd | Nonwoven fabric consisting of conjugate type filament |
| JP3261728B2 (en) * | 1992-02-18 | 2002-03-04 | チッソ株式会社 | Thermal adhesive fiber sheet |
| JP3109628B2 (en) * | 1992-09-25 | 2000-11-20 | チッソ株式会社 | Manufacturing method of composite fiber |
| US5707735A (en) * | 1996-03-18 | 1998-01-13 | Midkiff; David Grant | Multilobal conjugate fibers and fabrics |
-
1997
- 1997-09-08 JP JP25925197A patent/JP3741180B2/en not_active Expired - Fee Related
-
1998
- 1998-01-20 EP EP98100922A patent/EP0854213B1/en not_active Expired - Lifetime
- 1998-01-20 DE DE69805664T patent/DE69805664T2/en not_active Expired - Lifetime
- 1998-01-20 CN CN98105650A patent/CN1195040A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128255C (en) * | 1997-07-28 | 2003-11-19 | 弗纳技术股份有限公司 | Isotactic polypropylene and syntiotactic polypropylent double-component fiber, making method and products thereof |
| WO2000043594A1 (en) * | 1999-01-22 | 2000-07-27 | Sichuan Foreign Economic Relations & Trade Corporation | Synthetic fiber paper and the production process thereof |
| CN102534863A (en) * | 2011-12-29 | 2012-07-04 | 江西国桥实业有限公司 | Double-component non-woven spinning and production method thereof |
| CN105101927A (en) * | 2013-03-15 | 2015-11-25 | 宝洁公司 | Packages for articles of commerce |
| CN105101927B (en) * | 2013-03-15 | 2019-04-26 | 宝洁公司 | Package for article of commerce |
| CN105636686A (en) * | 2013-10-09 | 2016-06-01 | 纯化迪发有限公司 | Chromatography medium |
| CN105636686B (en) * | 2013-10-09 | 2018-08-17 | 纯化迪发有限公司 | chromatographic media |
| CN103882539A (en) * | 2013-12-04 | 2014-06-25 | 太仓荣文合成纤维有限公司 | Gray elastic fiber and preparing method thereof |
| CN103882539B (en) * | 2013-12-04 | 2017-02-08 | 太仓荣文合成纤维有限公司 | Gray elastic fiber and preparing method thereof |
| CN112281228A (en) * | 2020-09-10 | 2021-01-29 | 深圳市华远新材料有限公司 | Cross-shaped sheath-core structure polylactic acid tow and preparation method thereof |
| CN116590804A (en) * | 2023-07-17 | 2023-08-15 | 江苏新视界先进功能纤维创新中心有限公司 | Profiled fiber with multistage wicking structure and application of profiled fiber to geotextile |
| CN116590804B (en) * | 2023-07-17 | 2024-03-22 | 江苏新视界先进功能纤维创新中心有限公司 | Profiled fiber with multistage wicking structure and application of profiled fiber to geotextile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10259522A (en) | 1998-09-29 |
| EP0854213B1 (en) | 2002-06-05 |
| EP0854213A1 (en) | 1998-07-22 |
| DE69805664D1 (en) | 2002-07-11 |
| DE69805664T2 (en) | 2003-02-06 |
| JP3741180B2 (en) | 2006-02-01 |
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