CN102808238B - Heat sealability composite fibre and the nonwoven fabric using it - Google Patents
Heat sealability composite fibre and the nonwoven fabric using it Download PDFInfo
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- CN102808238B CN102808238B CN201210167177.1A CN201210167177A CN102808238B CN 102808238 B CN102808238 B CN 102808238B CN 201210167177 A CN201210167177 A CN 201210167177A CN 102808238 B CN102808238 B CN 102808238B
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Abstract
When being provided in for nonwoven fabric, the fiber that can obtain the retractility of bulkiness, higher nonwoven fabric intensity and excellence and the nonwoven fabric using it and obtain.A kind of heat sealability composite fibre and use its nonwoven fabric, heat sealability composite fibre is 3 kinds of resinous principles of use the 1st composition ~ the 3rd composition and the composite fibre obtained, 1st composition is by melting or softening and have the resinous principle of thermal bonding, its fusing point or softening point are lower than the fusing point of other 2 kinds of compositions or softening point, 2nd composition is non-thermal contraction or the heat-shrinkable resinous principle lower than the 3rd composition, 3rd composition is the resinous principle of heat-shrinkable, this each composition independently exists on the fibre section at a right angle relative to fiber long axes, 1st composition and the 3rd composition configure side by side centered by the 2nd composition, at least the 1st composition accounts for a part for fiber surface continuously on fibre length direction, and at least a part for the 3rd composition accounts for a part for fiber surface continuously on fibre length direction.
Description
Technical field
The present invention relates to a kind of heat sealability composite fibre and use its nonwoven fabric.More specifically, the nonwoven fabric with retractility that the invention provides the potential crimp property composite fibre of a kind of heat sealability and use it and obtain.
Background technology
As obtaining, there is the method for the nonwoven fabric of retractility, usually utilizing meltblown by elastomer resin laminated on conveyer, and undertaken bondingly manufacturing sheet material by hot rolling.But because the bulkiness of obtained sheet material is very low, therefore gas permeability is low and damage feel.In addition, also there is the problem (with reference to patent document 1) causing surface smoothness difference because of the distinctive friction of elastomer resin.
Therefore, have and utilize comb and parallel cotton fibers prior to spinning method that the fiber with potential crimp property is made net, heat-treat after making it be wound around by jet water course, make it manifest thus and crispatura (shrink process) and constructively give flexible method, but owing to being utilize the structure be wound around, therefore there is the low problem of nonwoven fabric intensity (with reference to patent document 2).
As additive method, there is following method, namely in order to give cementability and potential crimp property, comb and parallel cotton fibers prior to spinning method is utilized sheath portion (fiber peripheral part) to be used fusing point to be the thermoplastic resin of 80 DEG C ~ 170 DEG C, core uses the potential crimp property composite fibre of the thermal bonding of two kinds of different thermoplastic resins of the heat shrinkability characteristic of fusing point up to more than 20 DEG C to make net, by carry out hot blast penetrate processing give the cementability produced by low-temperature resins, and by making potentially to crispatura that showing makes to crispatura to manifest in change gives nonwoven fabric intensity and retractility, but make because the sheath portion becoming bonding composition covers the core manifested of crispaturaing, therefore exist to manifest and crispatura fully and damage the problem (with reference to patent document 3) of telescopicing performance.
[prior art document]
[patent document]
No. 2009-256856, [patent document 1] Japanese Patent Laid-Open
Flat No. 8-268951 of [patent document 2] Japan Patent Patent
Flat No. 6-280147 of [patent document 3] Japan Patent Patent
Summary of the invention
Problem of the present invention is to provide one especially when for nonwoven fabric, the fiber that can obtain the retractility of bulkiness, higher nonwoven fabric intensity and excellence and the nonwoven fabric using it and obtain.
The described problem of solution that the present inventor etc. are artificial and repeatedly make great efforts study result, find on the fibre section at a right angle with fiber long axes direction, the fiber being configured with 3 kinds of resinous principles on specific position respectively solves described problem, and completes the present invention according to this discovery.
The present invention has following formation.
(1) a kind of heat sealability composite fibre, it is use the 1st composition, 3 kinds of resinous principles of the 2nd composition and the 3rd composition and the composite fibre obtained, 1st composition is by melting or softening and have the resinous principle of thermal bonding, its fusing point or softening point are lower than the fusing point of other 2 kinds of compositions or softening point, 2nd composition is non-thermal contraction or the heat-shrinkable resinous principle lower than the 3rd composition, 3rd composition is the resinous principle of heat-shrinkable, this each composition is (following in the fibre section at a right angle relative to fiber long axes, also referred to as fibre section) on separately exist, 1st composition and the 3rd composition configure side by side centered by the 2nd composition, at least the 1st composition occupies a part for fiber surface continuously on fibre length direction, and at least a part for the 3rd composition occupies a part for fiber surface continuously on fibre length direction.
(2) the heat sealability composite fibre according to described (1), wherein the 1st composition is containing being selected from low density polyethylene (LDPE) (LowDensityPolyethylene, LDPE), straight-chain low density polyethylene (LDPE) (LinearLowDensityPolyethylene, the resinous principle of at least one L-LDPE) and in thermoplastic elastomer (TPE), 2nd composition is the resinous principle containing crystalline polypropylene, and the 3rd composition is the resinous principle containing propylene copolymers.
(3) the heat sealability composite fibre according to described (1) or (2), wherein the 1st composition occupies 30% ~ 80% of fiber surface continuously on fibre length direction.
(4) the heat sealability composite fibre according to any one of described (1) to (3), wherein the fusing point of the 1st composition is more than 70 DEG C, less than 125 DEG C, and the fusing point of the 3rd composition is more than 120 DEG C, less than 147 DEG C.
(5) the heat sealability composite fibre according to any one of described (2) to (4), wherein the 1st composition contains metallocene class L-LDPE, propylene copolymers contained in 3rd composition comprises the ethene that content is 4wt% (percentage by weight) ~ 10wt%, and content is the ethylene-propylene bipolymer of the propylene of 90wt% ~ 96wt%.
(6) the heat sealability composite fibre according to any one of described (2) to (4), wherein contained in the 3rd composition propylene copolymers comprises the ethene that content is 1wt% ~ 7wt%, content is the propylene of 90wt% ~ 98wt%, and content is ene-propylene-butene-1 terpolymer of the 1-butylene of 1wt% ~ 5wt%.
(7) nonwoven fabric, it uses the heat sealability composite fibre according to any one of described (1) to (6) and obtains.
(effect of invention)
Heat sealability composite fibre of the present invention can give highly shrinkable and cementability, and then after nonwoven fabric processing, potential crispaturaing shows manifesting with changing, and becomes the nonwoven fabric of the retractility with bulkiness, higher nonwoven fabric intensity and excellence thus.
Accompanying drawing explanation
Fig. 1 is the figure (form of example 1) of the example of the preferred fibre section representing heat sealability composite fibre of the present invention.
Fig. 2 is the figure (form of example 2) of the example of the preferred fibre section representing heat sealability composite fibre of the present invention.
Fig. 3 is the figure (form of example 3) of the example of the preferred fibre section representing heat sealability composite fibre of the present invention.
Fig. 4 is the figure of the example of the preferred fibre section representing heat sealability composite fibre of the present invention.
Fig. 5 is the figure of the example of the preferred fibre section representing heat sealability composite fibre of the present invention.
Fig. 6 is the figure (form of comparative example 1) of the example of the fibre section represented relative to comparative example of the present invention.
Fig. 7 is the figure (form of comparative example 2) of the example of the fibre section represented relative to comparative example of the present invention.
Detailed description of the invention
Heat sealability composite fibre of the present invention is the composite fibre with following fibre section: the violent resin (the 3rd composition) of low melting point (or low softening point) resin (the 1st composition) and thermal contraction behavior arranges side by side using form non-thermal contraction resin or the little resin (the 2nd composition) of heat-shrinkable being clamped it as center.Principle of the present invention is as follows: maximum the 3rd composition of heat-shrinkable shrinks when being subject to heat treatment and composite fibre is manifested crispaturas, and it becomes the inner side of crispaturaing, fusing point (or softening point) plays function lower than the 1st composition of the 2nd composition and the 3rd composition as the composition participating in heat bonding, even if other 2 kinds of compositions manifest crispatura, also can not damage its shape of crispaturaing and keep the state of melting (or softening) in the outside of crispaturaing, even if therefore solidify, also to keep the state of shape of crispaturaing to form the adhesive spots mutual heat fusing of contact of the outside of crispaturaing of composite fibre (and bonding) in the outside of crispaturaing.
If the 1st composition fusing point of heat sealability composite fibre of the present invention or softening point are lower than other 2 kinds of compositions, and by melting or softening and form the resinous principle of adhesive spots, be then not particularly limited.About with other 2 kinds of compositions among the fusing point (softening point) of the lower composition of fusing point (or softening point) poor, if temperature range when considering the acquisition possibility of resin or do not make other components fuse (softening) and make the 1st components fuse (softening) in heat treatment, then preferably select the lower fusing point (softening point) of 5 DEG C ~ 40 DEG C poor, more preferably select the situation of lower fusing point (softening point) difference of 10 DEG C ~ 35 DEG C.As this kind the 1st composition, specifically, the resinous principle containing at least one be selected from LDPE, L-LDPE and thermoplastic elastomer (TPE) can be enumerated.
If the 2nd composition non-thermal contraction or heat-shrinkable lower than the resinous principle of the 3rd composition, are then not particularly limited, specifically, the resinous principle containing crystalline polypropylene can be enumerated.
If the resinous principle of the 3rd composition heat-shrinkable, be then not particularly limited, specifically, the resinous principle containing propylene copolymers can be enumerated.
In the present invention, the 1st composition is made contributions to cementability as the resinous principle with thermal bonding.As LDPE or L-LDPE being used as the 1st composition, preferred fusing point is LDPE or L-LDPE in the scope of more than 70 DEG C, less than 125 DEG C, more preferably more than 95 DEG C, less than 120 DEG C.If the fusing point of LDPE or L-LDPE contained in the 1st composition is less than 125 DEG C, then can at the temperature of the 1st composition heat fusing, suppress the participation for heat bonding caused by melting of the 3rd composition containing propylene copolymers, therefore can prevent the 3rd composition from nonwoven fabric, forming adhesive spots, and the retractility of nonwoven fabric can be kept.In the case, the intensity of nonwoven fabric is kept fully by the bonding of the 1st composition.If the fusing point of the 1st composition is more than 70 DEG C, then in the comb and parallel cotton fibers prior to spinning step making net, the combing friction of metal wire is inhibited, and can not cause the generation (fiber welding) etc. of cotton knot, quality is kept well.And then with regard to the viewpoint of low-temperature processability or stretching, extension, surface smoothness, preferred L-LDPE uses the L-LDPE manufactured by Metallocene-type catalysts.
As the 1st composition, also thermoplastic elastomer (TPE) can be used.When using thermoplastic elastomer (TPE), softening by thermoplastic elastomer (TPE) carry out heat bonding because of heat.As thermoplastic elastomer (TPE), with regard to the viewpoint of processability, preferred softening point is the thermoplastic elastomer (TPE) of 70 DEG C ~ 110 DEG C, and more preferably softening point is the thermoplastic elastomer (TPE) of the scope of 80 DEG C ~ 100 DEG C.As this kind of thermoplastic elastomer (TPE), hydrogenated styrene analog elastomer (styrene-ethylene-butylene-styrene (Styrene-Ethylene-Butylene-Styrene can be illustrated, SEBS)), thermoplastic polyurethane (ThermoplasticPolyurethane, TPU).In addition, with regard to the viewpoint of compatibility, also can enumerate olefin type elastomer as preference.As olefin type elastomer, ethylene-octene-1 copolymer (DOW Chemical (DowChemical) company manufactures Engage8402) can be illustrated.
If use thermoplastic elastomer (TPE) as the 1st composition, then interfibrous contact via this elastomer components heat bonding, therefore its adhesive spots band itself is flexible, and have for the adjoint buffering effect being applied to the distortion of the tension force of nonwoven fabric etc., result gives flexibility, retractility to nonwoven fabric, and the adherence had by elastomer components and strengthen the adhesive strength of adhesive spots, the adhesive strength of result adhesive spots also uprises.
As the 1st composition, the one kind or two or more mixture of thermoplastic elastomer (TPE) can be used, in addition, also can be used in combination by them and LDPE or L-LDPE.Not hindering in the scope by melting or the softening heat bonding effect produced, also can to make in the 1st composition further containing other resins or lubricant or the additive such as pigment or the inorganic matter such as calcium carbonate or titanium oxide.
Using the olefin copolymer of propylene as principal component as the propylene copolymers illustrated in the 3rd composition.This kind of propylene copolymers is by making propylene and ethene or propylene and ethene and alpha-olefin copolymer and obtaining.As the alpha-olefin used in propylene copolymers, can illustrate butene-1, amylene-1, hexene-1, heptene-1, octene-1,4-methyl pentene-1 etc., in addition, what also can be used together in these alpha-olefins is two or more.
As the concrete example of this kind of propylene copolymers, ethylene-propylene bipolymer, propene-1-butene-1 bipolymer, ene-propylene-butene-1 terpolymer, butene-hexene-1 bipolymer, propylene-octene-1 bipolymer etc. and their mixture etc. can be illustrated.These copolymers can be random copolymers, also can be block copolymers.
As this kind of propylene copolymers, with regard to the inotropic viewpoint of Low Temperature Thermal, preferred concrete example can enumerate ethylene-propylene bipolymer, ene-propylene-butene-1 terpolymer, and then, with regard to Low Temperature Thermal shrinkage, the viewpoint of cost, can enumerate and comprise the ethene that content is 4wt% ~ 10wt%, content is the ethylene-propylene bipolymer of the propylene of 90wt% ~ 96wt%, comprise the ethene that content is 1wt% ~ 7wt%, content is the propylene of 90wt% ~ 98wt%, content is ene-propylene-butene-1 terpolymer of the 1-butylene of 1wt% ~ 5wt%.
As the fusing point of the propylene copolymers of the 3rd composition, with fusing point higher than the 1st composition for condition, preferably more than 120 DEG C, less than 147 DEG C, the scope of more preferably more than 125 DEG C, less than 140 DEG C.If fusing point is more than 120 DEG C, then it is poor to obtain fully with the fusing point of the 1st previously described composition, can suppress with the melting of the 1st composition or softening while the situation of the 3rd components fuse.If the melting of the 3rd composition can be suppressed, then form adhesive spots in the outside (the 1st composition side) of crispaturaing manifested by heat treatment, therefore nonwoven fabric limbers up, the thermal contraction of the 3rd composition itself is not also hindered because of bonding, can manifest efficiently, therefore can manufacture the nonwoven fabric being rich in retractility.In addition, if fusing point is less than 147 DEG C, then with the desirable higher value of fusing point difference of crystalline polypropylene that uses in the 2nd composition described later, therefore can making crispaturas manifests and preferably efficiently.
The fusing point of the 3rd composition is with regard to the viewpoint of nonwoven fabric processability, preferably higher than the 1st composition, more preferably the fusing point difference (fusing point of fusing point-1 composition of the 3rd composition) of the 3rd composition and the 1st composition is the scope of 10 DEG C ~ 70 DEG C, and then the scope of more preferably 20 DEG C ~ 40 DEG C.
As the melt mass flow rate (meltmass-flowrate) of the 3rd composition, with regard to the viewpoint of spinnability, processability, in the condition 14 times of JIS-K7210, preferred 0.1g/10min ~ 80g/10min, more preferably 3g/10min ~ 40g/10min.
Not hindering in the scope of these effects, the 3rd composition also can contain the additive such as other resins, lubricant or pigment or the inorganic matter such as calcium carbonate or titanium oxide.
The crystalline polypropylene used in so-called 2nd composition, refers to Noblen or propylene and a small amount of is generally the ethene of below 2wt% or the copolymer of alpha-olefin.As this kind of crystalline polypropylene, the crystalline polypropylene obtained by general Z-N (Ziegler-Natta) catalyst or metallocene catalyst can be illustrated.As the fusing point of the 2nd composition, with regard to the viewpoint of shrink finishing quality, preferably higher than the fusing point of the 3rd composition, the scope of their fusing point difference preferably 15 DEG C ~ 45 DEG C, the scope of more preferably 20 DEG C ~ 30 DEG C.
As the melt mass flow rate of the 2nd composition, with regard to the viewpoint of spinnability, processability, at condition 14 times preferred 0.1g/10min ~ 80g/10min, more preferably 3g/10min ~ 40g/10min of JIS-K7210.
In the fibre section (cross section at a right angle relative to fiber long axes) of heat sealability composite fibre of the present invention, each composition separately exists on fibre section, 1st composition and the 3rd composition configure side by side centered by the 2nd composition, at least the 1st composition occupies a part for fiber surface continuously on fibre length direction, and at least a part for the 3rd composition occupies a part for fiber surface continuously on fibre length direction.The concrete example of this kind of form can enumerate the fibre section as shown in Fig. 1 ~ Fig. 5.As described in shown in each figure, each composition separately exists on fibre section, the 1st composition is configured in left side in each figure centered by the 2nd composition, the 3rd composition is configured in right side.
By the 1st composition that becomes bonding composition on fibre length direction continuously and be positioned at surface, especially on fibre length direction, fiber surface 30% ~ 80% is occupied continuously, and show the cementability of fiber self-cementability each other and the appropriateness with other materials, and the fiber with high potential crimp property can be obtained side by side by the 2nd composition and the 3rd composition.Especially, with regard to the viewpoint of cementability, more preferably the 1st composition occupies 30% ~ 80% of fiber surface continuously on fibre length direction.
On the fibre section at a right angle with fiber long axes, each boundary line between the 3 kinds of compositions configured side by side can be independently straight line, also can be curve.Especially, as shown in FIG. 1 to 3, the situation that the mode of at least drawing the arc (drawing arc in the mode outstanding towards left side in Fig. 1 ~ Fig. 3) of concavity with the boundary line of the 2nd composition and the 3rd composition towards the 3rd composition side (for right side in Fig. 1 ~ Fig. 3) arranges, or on the fibre section at a right angle with fiber long axes, the situation of the side-by-side configuration that the mode that the fiber surface side (being right side in Fig. 1 ~ Fig. 3) that formation is not exposed towards the 1st composition with each boundary line of 3 kinds of compositions draws the arc (giving prominence to towards left side in Fig. 1 ~ Fig. 3 equally) of concavity respectively configures also is one of preferred configuration of fiber of the present invention.By adopting this kind of side-by-side configuration, between fiber, via the 1st composition with thermal bonding, the chance that contacts becomes many, can reach heat bonding efficiently, therefore with regard to the viewpoint of the nonwoven fabric intensity after nonwoven fabric processing preferably.In addition, the present invention also comprises the form of the fibre section shown in Fig. 4 or Fig. 5.
As the sectional area ratio of the 1st composition, the 2nd composition and the 3rd composition, the area ratio of the 2nd composition and the 3rd composition is set to the scope of 40: 60 ~ 60: 40, more preferably the area of the 1st composition is the scope of 1/3 ~ 1 for the ratio of the total area of the 2nd composition and the 3rd composition.If the 1st composition becoming bonding composition is more than 1/3 for the area ratio of the total area of the 2nd composition and the 3rd composition, the bonding force then produced by the 1st composition is kept fully, in addition, if this area ratio is less than 1, then the amount of the 1st composition is maintained in the scope of the possibility of the thermal contraction can getting rid of obstruction the 3rd composition completely, and manifesting property of therefore crispaturaing is good.
When this kind will be obtained with the fibre section that fiber long axes is at a right angle, obtain by using three composition side. by-side conjugation spinning heads shown in the flat 2-172718 of Japan Patent Patent.Use the mould identical with mould described in the document, and control mobility (melt temperature, the melt flow rate (MFR) (MeltFlowRate of such as resin, MFR)), the boundary line that can manufacture efficiently thus between composition becomes to draw in concave shape the fiber of the cross sectional shape of arc towards the 3rd composition side.Such as, when the resin that mobility is identical, the cross section obtained becomes first quarter moon shape, if but improve the mobility of wherein a kind of resin, then to the changes of section such as covering the low resin of mobility.By utilizing this point, the cross sectional shape between three compositions can be made to change.
The fiber number of heat sealability composite fibre of the present invention is not particularly limited, but the scope of preferred 1.0dtex ~ 20dtex, more preferably 1.5dtex ~ 10dtex, and then more preferably 2.2dtex ~ 6.6dtex.If fiber number is more than 1.0dtex, then can prevent the generation etc. of cotton knot in comb and parallel cotton fibers prior to spinning step completely, therefore the quality of nonwoven fabric becomes good.If below 20dtex, then can making crispaturas manifests fully.
Be 100g/m when heat sealability composite fibre of the present invention is made weight per unit area
2the net of left and right, and when this net being placed in the baking oven of 125 DEG C 5 minutes, easily can manifest the shrinkage factor of more than 50%, and then, also can manifest the shrinkage factor of more than 60% aptly.
If shrinkage factor is more than 50%, then can give sufficient retractility to nonwoven fabric, and become soft nonwoven fabric.
Heat sealability composite fibre of the present invention also can carry out mixed cotton with such as other potential other fibers such as composite fibre of crispaturaing.Other potential composite fibres of crispaturaing can enumerate the fiber etc. with arranged side by side or eccentric cross section only comprising the 2nd composition of the present invention and the 3rd composition.
Below the method using heat sealability composite fibre of the present invention to manufacture nonwoven fabric is described.
Fiber of the present invention can carry out in a step fiber utilize the nonwoven fabric of thermal welding and the potential of this fiber to crispatura manifest, also can first implement nonwoven fabric step, then implement potential crispatura manifest step.Especially, if implement with the method for the latter, then after nonwoven fabric processing, the preshrunk dryer etc. can giving heat with no-station pole canopyization can be used, thus more uniformly can give high convergency.
As Production Example when the former, the method that can be listed below: utilize comb and parallel cotton fibers prior to spinning method process heat sealability composite fibre of the present invention and make net, more than the fusing point of the 1st composition and fiber produce through heated air circulation type heat-treating machine (hot blast penetrates machine) under the processing temperature of shrinking, and carry out bonding with contraction simultaneously.The method that Production Example when the latter can be listed below: utilize comb and parallel cotton fibers prior to spinning method that heat sealability composite fibre of the present invention is made net, after forming nonwoven fabric, under the processing temperature more than contraction initial temperature, below the 3rd congruent melting point, preshrunk dryer is utilized to heat-treat through heated air circulation type heat-treating machine (hot blast penetrates machine) under processing temperature more than the fusing point of the 1st composition and below the contraction initial temperature of fiber.
Below, explain the present invention by example, but the present invention is not limited to these examples.
< fiber >
It is 98 DEG C by fusing point, MI is that the elastomer resin (name of an article: Engage8402 Dow Chemical manufactures) of 30g/10min is for the 1st composition, it is 160 DEG C by fusing point, MFR is homo-polypropylene resin (the JapanPolypropylene company manufacture of 16g/10min, SA2E) for the 2nd composition, it is 130 DEG C by fusing point, ethylene contents is 4wt%, butene-1 content is 2.7wt%, MFR is propylene copolymer (the JapanPolypropylene company manufacture of 16g/10min, SG02) for the 3rd composition, the form the 2nd composition being clamped it as center using the 1st composition and the 3rd composition is used to carry out the spinneret in 230 holes sprayed, extrude under arbitrary processing temperature, change sectional area ratio thus and obtain fiber.
Utilize the extension roller of 90 DEG C to make this fiber extend to 2.5 times, acquisition 2.2dtex, Cutting Length are the raw cotton of 51mm.
< shrinkage determination method >
By the method shown in following each example, composite fibre is processed into nonwoven fabric, for the sample before heat treatment, measure longitudinally each central authorities of (MachineDirection) (manufacturing flow direction of the machine of nonwoven fabric) with the length at these 3 positions, its two ends and using it on average as (A) value.Then, carry out similarly after heat treatment measuring and using it on average as (B) value, calculate shrinkage factor by following formula.Heat treatment is carry out in the baking oven of 100 DEG C and 125 DEG C in temperature, and measure its result.
Shrinkage factor (%)=((A)-(B))/(A) × 100
Example 1
Using the area ratio of the 2nd composition on fibre section and the 3rd composition to be the area of the 50: 50,1st composition is the fiber of 1/2 for the ratio of the total area of the 2nd composition and the 3rd composition.Fiber has the cross section as Fig. 1, and on the cross section in the direction at a right angle with fiber long axes, the 1st composition occupies 33% of fiber surface continuously on fibre length direction.In shrinkage determination in the baking oven of 100 DEG C, shrinkage factor is 3%, and in the shrinkage determination in the baking oven of 125 DEG C, shrinkage factor is 70%.
Utilize Small Sized Carding Machines that this fiber is made weight per unit area for 30g/m
2net, then utilize processing temperature to be that the hot blast of 100 DEG C penetrates machine to make nonwoven fabric.Then, under the processing temperature of 125 DEG C, carry out hot blast penetrate processing, and carry out thermal contraction process.
The nonwoven fabric that obtained soft and display high strength and retractility.
Example 2
Using the area ratio of the 2nd composition on fibre section and the 3rd composition to be the area of the 40: 60,1st composition is the fiber of 1/3 for the ratio of the total area of the 2nd composition and the 3rd composition.Fiber has the cross section as Fig. 2, and on the cross section in the direction at a right angle with fiber long axes, the 1st composition occupies 20% of fiber surface continuously on fibre length direction.In shrinkage determination in the baking oven of 100 DEG C, shrinkage factor is 7%, and in the shrinkage determination in the baking oven of 125 DEG C, shrinkage factor is 78%.
Utilize Small Sized Carding Machines that this fiber is made weight per unit area for 30g/m
2net, then utilize processing temperature to be that the hot blast of 100 DEG C penetrates machine to make nonwoven fabric.Then, under the processing temperature of 125 DEG C, carry out hot blast penetrate processing, and carry out thermal contraction process.
Soft and the display high scalability of the nonwoven fabric that obtained.
Example 3
Using the area ratio of the 2nd composition on fibre section and the 3rd composition to be the area of the 60: 40,1st composition is the fiber of 1/2 for the ratio of the total area of the 2nd composition and the 3rd composition.Fiber has the cross section as Fig. 3, and on the cross section in the direction at a right angle with fiber long axes, the 1st composition occupies 48% of fiber surface continuously on fibre length direction.In shrinkage determination in the baking oven of 100 DEG C, shrinkage factor is 1%, and in the shrinkage determination in the baking oven of 125 DEG C, shrinkage factor is 68%.
Utilize Small Sized Carding Machines that this fiber is made weight per unit area for 30g/m
2net, then utilize processing temperature to be that the hot blast of 100 DEG C penetrates machine to make nonwoven fabric.Then, under the processing temperature of 125 DEG C, carry out hot blast penetrate processing, and carry out thermal contraction process.
Soft and the display retractility of the nonwoven fabric that obtained.
Comparative example 1
The 2nd composition and the 3rd composition is used to configure (side by side) side by side, the 2nd composition on fibre section and the area ratio of the 3rd composition be the area of the 50: 50,1st composition for the ratio of the total area of the 2nd composition and the 3rd composition for 1/3 and the fiber shown in the Fig. 6 surrounding periphery.In shrinkage determination in the baking oven of 100 DEG C, shrinkage factor is 0%, and in the shrinkage determination in the baking oven of 125 DEG C, shrinkage factor is 40%.
Utilize Small Sized Carding Machines that this fiber is made weight per unit area for 30g/m
2net, then utilize processing temperature to be that the hot blast of 100 DEG C penetrates machine to make nonwoven fabric, under the processing temperature of 125 DEG C, then carry out hot blast penetrate processing, and carry out thermal contraction process, the retractility step-down of the nonwoven fabric of less contraction can be obtained.
Comparative example 2
The 2nd composition and the 3rd composition is used to configure abreast, the 2nd composition on fibre section and the area ratio of the 3rd composition are that the area of the 50: 50,1st composition is 1/3 for the ratio of the total area of the 2nd composition and the 3rd composition and surrounds the fiber of the eccentric configuration (Fig. 7) of periphery.In shrinkage determination in the baking oven of 100 DEG C, shrinkage factor is 30%, and in the shrinkage determination in the baking oven of 125 DEG C, shrinkage factor is 50%.
Utilize Small Sized Carding Machines that this fiber is made weight per unit area for 30g/m
2net, then utilize processing temperature to be that the hot blast of 100 DEG C penetrates machine to make nonwoven fabric, the quality in result nonwoven fabric caused by shrinking is significantly bad.Then under the processing temperature of 125 DEG C, carry out hot blast penetrate processing, and carry out thermal contraction process, but cannot shrink equably because described quality is bad, nonwoven fabric can see density.Therefore, the nonwoven fabric obtained is the nonwoven fabric that retractility is low.
The result of above example and comparative example is gathered and is shown in table 1.
[table 1]
(utilizability in industry)
Effect of the present invention can give highly shrinkable and cementability, and then after nonwoven fabric processing by potential crispatura manifest and the nonwoven fabric of the retractility with bulkiness, higher nonwoven fabric intensity and excellence can be obtained, therefore can be used for the flexible material of such as cataplasm base fabric, diaper, shrink nonwoven fabric etc.
Claims (7)
1. a heat sealability composite fibre, it is use the 1st composition, 3 kinds of resinous principles of the 2nd composition and the 3rd composition and the composite fibre obtained, described 1st composition is by melting or softening and have the resinous principle of thermal bonding, its fusing point or softening point are lower than the fusing point of other 2 kinds of compositions or softening point, described 2nd composition is non-thermal contraction or the heat-shrinkable resinous principle lower than described 3rd composition, described 3rd composition is the resinous principle of heat-shrinkable, described each composition separately exists on the fibre section at a right angle relative to fiber long axes, described 1st composition and described 3rd composition configure side by side centered by described 2nd composition, at least described 1st composition occupies a part for fiber surface continuously on fibre length direction, and a part at least described 3rd composition occupies a part for fiber surface continuously on fibre length direction.
2. heat sealability composite fibre according to claim 1, wherein said 1st composition is the resinous principle containing at least one be selected from low density polyethylene (LDPE), straight-chain low density polyethylene (LDPE) and thermoplastic elastomer (TPE), described 2nd composition is the resinous principle containing crystalline polypropylene, and described 3rd composition is the resinous principle containing propylene copolymers.
3. heat sealability composite fibre according to claim 1 and 2, wherein said 1st composition occupies 30% ~ 80% of fiber surface continuously on fibre length direction.
4. heat sealability composite fibre according to claim 1 and 2, the fusing point of wherein said 1st composition is more than 70 DEG C, less than 125 DEG C, and the fusing point of described 3rd composition is more than 120 DEG C, less than 147 DEG C.
5. heat sealability composite fibre according to claim 2, wherein said 1st composition contains the straight-chain low density polyethylene (LDPE) be polymerized by Metallocene-type catalysts, propylene copolymers contained in described 3rd composition is ethylene contents is 4wt% ~ 10wt%, and propylene content is the ethylene-propylene bipolymer of 90wt% ~ 96wt%.
6. heat sealability composite fibre according to claim 2, propylene copolymers contained in wherein said 3rd composition is ethylene contents is 1wt% ~ 7wt%, ene-propylene-butene-1 terpolymer of propylene content to be 90wt% ~ 98wt%, 1-butene content be 1wt% ~ 5wt%.
7. a nonwoven fabric, it uses heat sealability composite fibre according to any one of claim 1 to 6 and obtains.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-123684 | 2011-06-01 | ||
| JP2011123684A JP5741225B2 (en) | 2011-06-01 | 2011-06-01 | Heat-fusible composite fiber and non-woven fabric using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102808238A CN102808238A (en) | 2012-12-05 |
| CN102808238B true CN102808238B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210167177.1A Expired - Fee Related CN102808238B (en) | 2011-06-01 | 2012-05-25 | Heat sealability composite fibre and the nonwoven fabric using it |
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| Country | Link |
|---|---|
| JP (1) | JP5741225B2 (en) |
| CN (1) | CN102808238B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264134B (en) | 2013-03-12 | 2019-07-30 | 博爱无纺布公司 | Extendible adhesive-bonded fabric |
| CN104451926B (en) * | 2014-12-23 | 2016-11-30 | 浙江依爱夫游戏装文化产业有限公司 | Composite antibacterial fibre |
| WO2017091669A1 (en) * | 2015-11-25 | 2017-06-01 | Dow Global Technologies Llc | Bicomponent filaments |
| KR102053562B1 (en) * | 2016-01-26 | 2019-12-06 | 후지필름 가부시키가이샤 | Nano Fibers and Nonwovens |
| WO2018211843A1 (en) | 2017-05-16 | 2018-11-22 | 出光興産株式会社 | Crimped fibers and nonwoven fabric |
| CN107419431A (en) * | 2017-09-26 | 2017-12-01 | 昆山盛纺非织造材料研发中心有限公司 | A kind of compound loft nonwoven material of multicomponent and its manufacture method |
| CN111763997A (en) * | 2020-07-16 | 2020-10-13 | 常州纺兴精密机械有限公司 | Three-component composite hollow fiber and spinning assembly thereof |
| CN111763998A (en) * | 2020-07-16 | 2020-10-13 | 常州纺兴精密机械有限公司 | Three-component parallel composite fiber and spinning assembly thereof |
| CN112746390B (en) * | 2021-01-28 | 2022-04-12 | 广东春夏新材料科技股份有限公司 | Hot-air cloth for sanitary towel and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2012251254A (en) | 2012-12-20 |
| JP5741225B2 (en) | 2015-07-01 |
| CN102808238A (en) | 2012-12-05 |
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