CN101443501B - Nonwoven fabric - Google Patents

Nonwoven fabric Download PDF

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Publication number
CN101443501B
CN101443501B CN2007800172186A CN200780017218A CN101443501B CN 101443501 B CN101443501 B CN 101443501B CN 2007800172186 A CN2007800172186 A CN 2007800172186A CN 200780017218 A CN200780017218 A CN 200780017218A CN 101443501 B CN101443501 B CN 101443501B
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nonwoven fabric
mentioned
fiber
convex shaped
shaped part
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CN101443501A (en
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野田祐树
石川秀行
水谷聪
木村明宽
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Unicharm Corp
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Unicharm Corp
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Priority claimed from JP2006270106A external-priority patent/JP5328088B2/en
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Abstract

The invention provides a non-woven fabric regulated so as to permit swift migration of given liquid. The non-woven fabric is produced by blowing a fluid composed mainly of a gas onto fiber web (100), supported from its inferior surface side by a given air-permeable support member, from its superior surface side to thereby migrate fibers (101) constituting the fiber web (100). In the non-woven fabric, multiple groove portions (1) and convex portions (2) are formed in the direction of extension of blown region, and the fiber density at the groove portions (1) being regions blown by the gas is lower than the fiber density at the convex portions (2) being regions not blown by the fluid composed mainly of a gas.

Description

Nonwoven fabric
Technical field
The present invention relates to nonwoven fabric.
Background technology
In the past, nonwoven fabric was used in the broad like this field of medical supplies of the cleaning implement, face shield etc. of the amenities, wiper etc. of paper diaper, sanitary napkin etc.Like this, though nonwoven fabric is used in various different field,, under reality is used situation in the goods in each field, need manufacture character, structure that the purposes with each goods adapts.
Nonwoven fabric for example is to form fibrage (fiber web) by dry process, damp process etc., by chemical bonding, hot rolling method etc., the fibrolaminar fiber of formation is bonded to each other forms.Also have in making the operation that forms fibrolaminar fiber combination, sting this fibrolaminar method repeatedly, comprise the method for the power of physics that fibrage applied from the outside of the method etc. of jet water course with a plurality of pins.
But these methods only are to make fiber interlacing each other eventually, are not the orientation to fibrolaminar fiber, the method that configuration also has fibrolaminar shape etc. to adjust.That is what, produce with these methods is the nonwoven fabric of simple sheet.
In addition, for example have under the situation of liquid of regulation of excreta etc. at the nonwoven fabric of surface patch that is used for absorbent commodity etc., in order to keep or to improve sense of touch to skin, hope is to have concavo-convex nonwoven fabric etc.So, in No. 3587831 communique of patent, a plurality of fibrage laminations that will be made of the different fiber of heat-shrinkable are disclosed, carry out thermal welding etc., the thermal contraction of the layer by regulation has formed concavo-convex nonwoven fabric and manufacture method thereof on the surface.
But such nonwoven fabric exists owing to when concavo-convex formation, with a plurality of fibrage laminations, makes each fibrage integrated by thermal welding, so by its fibre density height of a plurality of zones of thermal welding, by the situation of further filming.Particularly under, more be difficult to make the liquid of the regulation of excreta etc. to see through rapidly downwards by the situation of filming.
Here, disclosed nonwoven fabric in patent documentation 1, be the second fibrage lamination that will constitute by the non-thermal contraction fiber first fibrolaminar single face or the two sides to the heat-shrinkable fiber that contains thermal contraction, by a plurality of thermal welding integrallies, in this thermal welding portion, by the first fibrolaminar thermal contraction, second fibrage is outstanding, forms a plurality of protuberances.
That is, even in the nonwoven fabric or nonwoven fabric manufacture method of patent documentation 1, because concavo-convex in order to form on fiber web, a plurality of fibrages that need have different proterties are so manufacturing process is miscellaneous.In addition, because if when thermal contraction, first fibrage and second fibrage are peeled off, then second fibrage can not form protuberance, so, need make first fibrage and the fusion positively of second fibrolaminar a plurality of thermal welding portion.In view of the above, exist the density of thermal welding portion to improve, further by filming, the problem that this zone is difficult to promptly to make the liquid of the regulation of excreta etc. to see through.So, the liquid that drops into the regulation of recess temporarily is trapped in recess, shifts to inside gradually from the side of recess.Have again, because the periphery of recess by heat embossing processing and by densificationization or by filming, so the liquid of regulation is difficult to rapid transfer.Therefore, exist, perhaps exert pressure, then the liquid situation of overflowing from recess easily to this nonwoven fabric if once have the liquid of a large amount of regulations.So these also can be described as problem of the present invention.
The present invention uses for reference above-mentioned such problem and the invention that produces, and its purpose is, provides a kind of and can be promptly the liquid of regulation be shifted, and adjust the nonwoven fabric of density at least.
Summary of the invention
Present inventors find by from upper face side, spray the fluid that mainly constitutes to aeration support component from the fiber web that following side supports by gas by regulation, this fibroreticulate fiber of formation is moved, can adjust, so that the situation that can promptly the liquid of stipulating be shifted is until having finished the present invention.
(1) a kind of nonwoven fabric, be to spray to fiber assembly by the fluid that will mainly constitute to form by gas, nonwoven fabric with first direction and second direction, a plurality of jeting areas with injected above-mentioned fluid, with a plurality of non-jeting area that does not have injected above-mentioned fluid, each fibre density of above-mentioned a plurality of jeting areas is lower than each fibre density of above-mentioned a plurality of non-jeting areas.
(2) in (1) described nonwoven fabric, each weight per unit area of above-mentioned a plurality of jeting areas is lower than each weight per unit area of above-mentioned a plurality of non-jeting areas.
(3) in (1) or (2) described nonwoven fabric, the containing ratio of above-mentioned each its first direction directional fiber of a plurality of jeting areas is lower than the containing ratio of second direction directional fiber.
(4) in each described nonwoven fabric of (1) to (3), the spatial area rate height that above-mentioned a plurality of non-jeting areas each its are measured from second side of the face of conduct and above-mentioned first side opposition side at the spatial area rate ratio from first side mensuration of the thickness direction of this nonwoven fabric.
(5) in each described nonwoven fabric of (1) to (4), each is a plurality of slot parts in the thickness direction depression of above-mentioned first this nonwoven fabric of side direction of the thickness direction of this nonwoven fabric for above-mentioned a plurality of jeting area, each is with adjacent along each mode of above-mentioned a plurality of slot parts for above-mentioned a plurality of non-jeting area, is to the outstanding a plurality of convex shaped parts of above-mentioned thickness direction in above-mentioned first side.
(6) in (5) described nonwoven fabric, each has the sidepiece that forms in the both sides of this convex shaped part above-mentioned a plurality of convex shaped parts, and each fibre density of above-mentioned sidepiece is than each fibre density height of above-mentioned a plurality of slot parts.
(7) in (6) described nonwoven fabric, each fibre density of above-mentioned sidepiece than each the conduct of these a plurality of convex shaped parts by the fibre density height of the central portion in the folded zone of above-mentioned sidepiece.
(8) in each described nonwoven fabric of (5) to (7), at above-mentioned a plurality of convex shaped parts in each, the difference of spatial area rate of measuring from above-mentioned first side and the spatial area rate measured from above-mentioned second side is more than 5%.
(9) in each described nonwoven fabric of (5) to (8), each fibre density of above-mentioned a plurality of slot parts is at 0.18g/cm 3Below, each fibre density of above-mentioned a plurality of convex shaped parts is at 0.20g/cm 3Below.
(10) in each described nonwoven fabric of (5) to (9), each has above-mentioned a plurality of slot parts in the formed fibre density in the bottom of the above-mentioned slot part a plurality of sparse zone lower than the average fibre density of this bottom.
(11) in (10) described nonwoven fabric, above-mentioned a plurality of sparse zones are a plurality of peristomes.
(12) in (11) described nonwoven fabric, above-mentioned a plurality of peristomes each periphery fibre density than above-mentioned a plurality of slot parts by the fibre density height in the folded zone of above-mentioned a plurality of peristomes.
(13) in (11) or (12) described nonwoven fabric, each the fiber of periphery of above-mentioned a plurality of peristomes is with along each the mode orientation of periphery of above-mentioned a plurality of peristomes.
(14) in each described nonwoven fabric of (5) to (13), the convex shaped part that the convex shaped part of the regulation of above-mentioned a plurality of convex shaped parts is adjacent with the slot part across regulation of above-mentioned a plurality of slot parts is different at the height of above-mentioned thickness direction.
(15) in each described nonwoven fabric of (5) to (14), each top of above-mentioned a plurality of convex shaped parts is the general flat shape.
(16) in each described nonwoven fabric of (5) to (15), in above-mentioned second side, form to the outstanding a plurality of zones of the projected direction opposition side of above-mentioned a plurality of convex shaped parts.
(17) in each described nonwoven fabric of (5) to (16), in above-mentioned first direction undulation.
(18) in each described nonwoven fabric of (1) to (15), above-mentioned second side of this nonwoven fabric is general plane.
(19) in each described nonwoven fabric of (1) to (18), the fiber that constitutes above-mentioned fiber assembly contains the fiber of WATER REPELLENCY.
The invention effect
If according to the present invention, then can provide a kind of and can adjust the nonwoven fabric of density at least promptly with the liquid transfer of regulation.
Description of drawings
Fig. 1 is fibroreticulate stereogram.
Fig. 2 A is the vertical view of the nonwoven fabric of first embodiment.
Fig. 2 B is the upward view of the nonwoven fabric of first embodiment.
Fig. 3 is the amplification stereogram of the regional X of Fig. 2.
Fig. 4 A is the vertical view of mesh-supported parts.
Fig. 4 B is the stereogram of mesh-supported parts.
Fig. 5 is illustrated in below the fiber web of Fig. 1 under the state of side by the mesh-supported member supporting of Fig. 4, side gas jet upward, the figure of the state of the nonwoven fabric of first embodiment of shop drawings 2.
Fig. 6 is the side view of the non-woven cloth manufacturing device of explanation first embodiment.
Fig. 7 is the vertical view of the non-woven cloth manufacturing device of key diagram 6.
Fig. 8 is the amplification stereogram of the regional Z of Fig. 6.
Fig. 9 is the upward view of the ejection portion of Fig. 8.
Figure 10 is the amplification stereogram of the nonwoven fabric of second embodiment.
Figure 11 is the amplification stereogram of the nonwoven fabric of the 3rd embodiment.
Figure 12 is the amplification stereogram of the mesh-supported parts of the 3rd embodiment.
Figure 13 is the amplification stereogram of the nonwoven fabric of the 4th embodiment.
Figure 14 is the amplification stereogram of the nonwoven fabric of the 5th embodiment.
Figure 15 is the amplification stereogram of the nonwoven fabric of the 6th embodiment.
Figure 16 A is the vertical view of support component of making the nonwoven fabric of Figure 15.
Figure 16 B is the stereogram of support component of making the nonwoven fabric of Figure 15.
Figure 17 is the amplification stereogram of the nonwoven fabric of the 7th embodiment.
Figure 18 is the amplification plan view of support component of making the nonwoven fabric of Figure 17.
Figure 19 is with the three-dimensional cutaway view of relevant nonwoven fabric use of the present invention under the situation of the surface patch of sanitary napkin.
Figure 20 is with the stereogram of relevant nonwoven fabric use of the present invention under the situation of the surface patch of diaper.
Figure 21 is as the three-dimensional cutaway view under the situation of the intermediate use of absorbent commodity with relevant nonwoven fabric of the present invention.
Figure 22 is as the stereogram under the situation of the back side, the outside use of absorbent commodity with relevant nonwoven fabric of the present invention.
The specific embodiment
Below, with reference to accompanying drawing, illustrate to be used to implement best mode of the present invention.
Fig. 1 is fibroreticulate stereogram.Fig. 2 A is the vertical view of the nonwoven fabric of first embodiment.Fig. 2 B is the upward view of the nonwoven fabric of first embodiment.Fig. 3 is the amplification stereogram of the regional X of Fig. 2.Fig. 4 A is the vertical view of mesh-supported parts.Fig. 4 B is the stereogram of mesh-supported parts.Fig. 5 is illustrated in below the fiber web of Fig. 1 under the state of side by the mesh-supported member supporting of Fig. 4, side gas jet upward, the figure of the state of the nonwoven fabric of first embodiment of shop drawings 2.Fig. 6 is the side view of the non-woven cloth manufacturing device of explanation first embodiment.Fig. 7 is the vertical view of the non-woven cloth manufacturing device of key diagram 6.Fig. 8 is the amplification stereogram of the regional Z of Fig. 6.Fig. 9 is the upward view of the ejection portion of Fig. 8.Figure 10 is the amplification stereogram of the nonwoven fabric of second embodiment.Figure 11 is the amplification stereogram of the nonwoven fabric of the 3rd embodiment.Figure 12 is the amplification stereogram of the mesh-supported parts of the 3rd embodiment.Figure 13 is the amplification stereogram of the nonwoven fabric of the 4th embodiment.Figure 14 is the amplification stereogram of the nonwoven fabric of the 5th embodiment.Figure 15 is the amplification stereogram of the nonwoven fabric of the 6th embodiment.Figure 16 A is the vertical view of support component of making the nonwoven fabric of Figure 15.Figure 16 B is the stereogram of support component of making the nonwoven fabric of Figure 15.Figure 17 is the amplification stereogram of the nonwoven fabric of the 7th embodiment.Figure 18 is the amplification plan view of support component of making the nonwoven fabric of Figure 17.Figure 19 is with the three-dimensional cutaway view of relevant nonwoven fabric use of the present invention under the situation of the surface patch of sanitary napkin.Figure 20 is with the stereogram of relevant nonwoven fabric use of the present invention under the situation of the surface patch of diaper.Figure 21 is as the three-dimensional cutaway view under the situation of the intermediate use of absorbent commodity with relevant nonwoven fabric of the present invention.Figure 22 is as the stereogram under the situation of the back side, the outside use of absorbent commodity with relevant nonwoven fabric of the present invention.
First embodiment
To Fig. 5, first embodiment of nonwoven fabric of the present invention is described according to Fig. 2.
The nonwoven fabric 110 of present embodiment is by spray the nonwoven fabric that the main fluid that is made of gas forms to fiber assembly.Like this, the fluid that forms injected mainly to constitute by gas as the slot part 1 of jeting area and do not have the convex shaped part 2 of the non-jeting area of conduct of the injected fluid that mainly constitutes by gas.Have, this nonwoven fabric 110 is the fibre density nonwoven fabric below the fibre density of convex shaped part 2 that are adjusted to slot part 1 again.
[1.1] shape
As Fig. 2 A, Fig. 2 B and shown in Figure 3, the nonwoven fabric 110 of present embodiment is the nonwoven fabric that roughly uniformly-spaced is formed with a plurality of slot parts 1 in the one side side of this nonwoven fabric 110 side by side as first embodiment.Then, between each, form each of a plurality of convex shaped parts 2 at a plurality of slot parts of roughly equally spaced forming 1.This convex shaped part 2 equally roughly equally spaced forms side by side with slot part 1.
In addition, the convex shaped part 2 of the nonwoven fabric 110 of present embodiment can express 0.3 to 15mm for example at the height of the thickness direction of this nonwoven fabric 110, and good is 0.5 to 5mm.In addition, the length of the width of each convex shaped part 2 is 0.5 to 30mm, and good is 1.0 to 10mm.In addition, the distance across between the summit of the adjacent convex shaped part 2 of slot part 1 can express 0.5 to 30mm for example, and good is 3 to 10mm.
In addition, the length of the thickness direction of the nonwoven fabric 110 of slot part 1 can be presented as below 90% of this height of convex shaped part 2 for example, and good is 1 to 50%, is more preferably 5 to 20%.The length of the width of slot part 1 can express 0.1 to 30mm for example, and good is 0.5 to 10mm.Can be presented as 0.5 to 20mm for example across convex shaped part 2 adjacent slot part 1 spacings to each other, good is 3 to 10mm.
By carrying out such design, for example, under the situation of this nonwoven fabric 110,, also be difficult to be exuded to widely the slot part 1 that the surface adapts even can form with when having drained the liquid of a large amount of regulations as the surface patch use of absorbent commodity.In addition,, become convex shaped part 2, also keep the space that slot part 1 produces easily,, drained under the situation of the liquid of stipulating, also be difficult to be exuded to widely the surface even under the state that has applied external pressure by the state of conquassation even when having applied superfluous external pressure.Have again,,, reduce with the contact area of skin owing to form concavo-convexly on the surface of this nonwoven fabric 110 even in case be absorbed into the liquid of the regulation of absorber etc. and depress outside under the situation of returning, so, there is the situation that is difficult to be attached to again widely skin.
Here, the assay method of the height of slot part 1 or convex shaped part 2, spacing, width is as follows.For example, nonwoven fabric 110 mounting under the state that does not have pressurization by microscope, is measured from the cross-section photograph or the cross sectional images of nonwoven fabric 110 to workbench.In addition, become the nonwoven fabric 110 of sample to cut off by the mode of convex shaped part 2 and slot part 1.
When measuring height (length of thickness direction), with from the upper/lower positions (that is workbench surface) of nonwoven fabric 110 to towards each extreme higher position of the convex shaped part 2 of top and slot part 1 for highly measuring.
In addition, when measuring spacing, measure the distance between the summit of adjacent convex shaped part 2, similarly measure slot part 1.
When measuring width, measure from the upper/lower positions (that is, the workbench surface) of nonwoven fabric 110 to Breadth Maximum towards the bottom surface of the convex shaped part 2 of top, similarly measure the Breadth Maximum of slot part 1 bottom surface.
Here, the cross sectional shape to convex shaped part 2 is not particularly limited.For example, can express dome-shaped, trapezoidal shape, triangular shape, Ω shape, four horn shapes etc. for example.For making the skin sense of touch good, near the end face of good is convex shaped part 2 and side is a curved surface.In addition, for because external pressure, convex shaped part 2 perhaps can also be kept the space that slot part 1 produces by conquassation, and good is from the bottom surface of convex shaped part 2 to end face width constriction.As the good cross sectional shape of convex shaped part 2, can express the curve (curved surface) of general dome shape etc. for example.
Here, in the first embodiment, though slot part 1 is roughly uniformly-spaced to form side by side, but be not to be defined to this, for example, can form yet according to each different interval, in addition, also can not side by side, but form in the mode of slot part 1 interval variation each other.
In addition, though the height (thickness direction) of the convex shaped part 2 of the nonwoven fabric 110 of first embodiment is roughly even,, for example also can form in the different mode of height of adjacent mutually convex shaped part 2.For example, the height of convex shaped part 2 can be adjusted in the interval of the ejiction opening 913 by adjusting the fluid that ejection described later mainly is made of gas.For example,, can reduce the height of convex shaped part 2 by the interval of constriction ejiction opening 913, otherwise, by enlarging the interval of ejiction opening 913, can improve the height of convex shaped part 2.Have again,, can also alternatively form highly different convex shaped part 2 by form the interval of ejiction opening 913 with narrow interval and big interval alternant way.In addition, like this, if the height of convex shaped part 2 is partly changed, then owing to the contact area with skin descends, so, also produced the advantage that can reduce the burden of skin.
[1.2] fiber alignment
As Fig. 2 A, Fig. 2 B and shown in Figure 3, in this nonwoven fabric 110, form and to contain fiber 101 in the different respectively zone of containing ratio as the vertical directional fiber of the orientated lengthwise of MD direction.Different respectively zones for example can be expressed slot part 1 for example, be constituted the sidepiece 8 and the central portion 9 of convex shaped part 2.
In the present embodiment, first direction is represented the length direction as the MD direction, and second direction is represented the width as the CD direction.
Here, fiber 101 is meant fiber 101 with respect to length direction (MD direction) in length direction (MD direction) orientation, spends the scope interior orientation of-45 degree+45, in addition, will be called vertical directional fiber at the fiber of orientated lengthwise.Then, fiber 101 is meant fiber 101 with respect to width in width (transverse direction) orientation, spends the scope interior orientation of-45 degree+45, in addition, will be called horizontal directional fiber at the fiber of width orientation.
Sidepiece 8 is the zones that are equivalent to the both sides of convex shaped part 2, and the fiber 101 of this sidepiece 8 is formed the containing ratio height of the containing ratio of vertical directional fiber than the vertical directional fiber of central portion 9 (in the zone that convex shaped part 2 is clipped by sidepiece 8).For example, the containing ratio of the vertical directional fiber of sidepiece 8 can express 55 to 100% for example, is more preferably 60 to 100%.The containing ratio of the vertical directional fiber of sidepiece 8 than 55% little situation under, have because the tension force that applies at width the situation that this sidepiece 8 is stretched.Have again, also exist because sidepiece 8 is stretched the situation of the tension force stretching that slot part 1, central portion described later 9 are also applied at width.
Central portion 9 be at convex shaped part 2 by the zone that the sidepiece 8 that becomes both sides clips, be the containing ratio zone lower of vertical directional fiber than sidepiece 8.This central portion 9 preferably will indulge directional fiber and horizontal directional fiber moderately mixes.
For example, the containing ratio of the vertical directional fiber of central portion 9 is formed lower more than 10% than the containing ratio of sidepiece 8, and is higher more than 10% than the containing ratio of the vertical directional fiber of the bottom of slot part 1 described later.Specifically, good is that the containing ratio of vertical directional fiber of central portion 9 is in 40 to 80% scope.
Slot part 1 is because as mentioned above, and () zone for example, hot blast, therefore, the vertical directional fiber of slot part 1 is directed onto sidepiece 8 to the fluid that mainly is made of gas by direct injection, and compiles.So the horizontal directional fiber of slot part 1 remains in the bottom of slot part 1.Therefore, the fiber 101 of the bottom of slot part 1 is the containing ratio height of the containing ratio of horizontal directional fiber than vertical directional fiber.
For example, it is lower more than 10% than the containing ratio of the vertical directional fiber of central portion 9 to express the containing ratio of vertical directional fiber of slot part 1 for example.Therefore, in the bottom of slot part 1, in this nonwoven fabric 110, the containing ratio of vertical directional fiber is minimum, otherwise the containing ratio of horizontal directional fiber is the highest.Specifically, the containing ratio of vertical directional fiber is 0 to below 45%, and good is 0 to 40%.The containing ratio of vertical directional fiber than 45% big situation under, as described later, owing to the weight per unit area of slot part 1 is low, so, be difficult to improve the intensity of the nonwoven fabric of width.So, for example used under the situation of this nonwoven fabric 110 at surface patch as absorbent commodity, in the process of using this absorbent commodity, exist owing to produce fold or damaged danger at width with the friction of health.
The mensuration of fiber alignment is to use the digit microscope VHX-100 of Keyemce (Keyence) corporate system to carry out, and carries out according to following assay method.(1) with the length direction is the MD direction, sample is arranged on the observation platform, and the fiber that (2) will be flown to is nearby at random removed, and the focus of lens is focused on the fiber the most nearby of sample, (3) set the photography degree of depth (depth), the 3D portrait of sample is made on the PC picture.Then, (4) are converted to the 2D portrait with 3D portrait, draw many on (5) picture at the measurement range parallel lines of five equilibrium length direction in time.(6) observe in each unit of drawing the parallel lines sectionalization, fiber alignment is a length direction, or width, measures the number of fiber towards each direction.Then, (7) with respect to all fibres radical in the setting range, calculates towards the ratio of the number of fiber of the fiber alignment of length direction with towards the ratio of the number of fiber of the fiber alignment of width, in view of the above, just can measure and calculate.
[1.3] fiber density
As Fig. 2 A, Fig. 2 B and shown in Figure 3, slot part 1 is adjusted to convex shaped part 2 and compares, and the fibre density of fiber 101 is low.In addition, the fibre density of slot part 1 can be adjusted arbitrarily according to the amount of the fluid (for example hot blast) that mainly is made of gas, all conditions of imposing on the tension force etc. of nonwoven fabric 110.Then, the fibre density of convex shaped part 2 is formed the fibre density height than slot part 1.
The fibre density of the bottom of this slot part 1 specifically can be expressed at 0.18g/cm for example 3Below, good is 0.002 to 0.18g/cm 3, be more preferably 0.005 to 0.05g/cm 3Fibre density in the bottom of slot part 1 compares 0.002g/cm 3Under the little situation, for example this nonwoven fabric 110 is being used under the situation of absorbent commodity etc., is having the damaged easily situations of this nonwoven fabric 110.In addition, the fibre density in the bottom of this slot part 1 compares 0.18g/cm 3Under the big situation, because liquid is difficult to shift downwards, so, there is the bottom that is trapped in this slot part 1, bring the possibility of damp to the user.
Convex shaped part 2 is adjusted to slot part 1 and compares, the fibre density height of fiber 101.In addition, the fibre density of convex shaped part 2 all conditions that can apply tension force etc. according to the amount of the fluid (for example hot blast) that mainly is made of gas, by nonwoven fabric 110 are adjusted arbitrarily.
The fibre density of convex shaped part 2 can be presented as 0.20g/cm particularly for example 3Below, good is 0.005 to 0.20g/cm 3, be more preferably 0.007 to 0.07g/cm 3Fibre density at this convex shaped part 2 compares 0.005g/cm 3Under the little situation, because at deadweight, the external pressure of the contained liquid of this convex shaped part 2, convex shaped part 2 is not only easily by conquassation, and, also exist the liquid that once absorbs adding the situation of returning easily of depressing.In addition, the fibre density at convex shaped part 2 compares 0.20g/cm 3Under the big situation, exist the liquid of the regulation that this convex shaped part 2 had to be difficult to shift downwards, liquid holdup brings the situation of damp at this convex shaped part 2 to the user.
The fibre density of the central portion 9 of convex shaped part 2 for example can express 0 to 0.20g/cm for example 3, good is 0.005 to 0.20g/cm 3, be more preferably 0.007 to 0.07g/cm 3Fibre density at this central portion 9 compares 0.005g/cm 3Under the low situation, because at deadweight, the external pressure of the contained liquid of this central portion 9, central portion 9 is not only easily by conquassation, and, also exist the liquid that once absorbs adding the situation of returning easily of depressing.In addition, the fibre density at central portion 9 compares 0.20g/cm 3Under the high situation, the liquid that exists this central portion 9 to be had is difficult to shift downwards, and liquid holdup brings the situation of damp at this central portion 9 to the user.
Have again, can adjust arbitrarily according to the amount of the fluid (for example hot blast) that mainly constitutes by gas, all conditions of imposing on the tension force etc. of nonwoven fabric 110 as the fibre density of the sidepiece 8 of the sidepiece of this convex shaped part 2.Specifically, the fibre density of this sidepiece 8 can express 0 to 0.40g/cm for example 3, good is 0.007 to 0.25g/cm 3, be more preferably 0.01 to 0.20g/cm 3Fibre density at this sidepiece 8 compares 0.007g/cm 3Under the low situation, there is the tension force that applies owing at width, the situation that sidepiece 8 is stretched.In addition, the fibre density at this sidepiece 8 compares 0.40g/cm 3Under the high situation, exist because the liquid that this sidepiece 8 is had is difficult to shift downwards, and be trapped in sidepiece 8, bring the possibility of damp to the user.
In addition, this nonwoven fabric 110 is formed from the spatial area rate measured as a face side face side, that convex shaped part 2 is given prominence to of the thickness direction of this nonwoven fabric 110 than low from spatial area rate another face side of the thickness direction of this nonwoven fabric 110, that measure with the face of the outstanding face opposition side of convex shaped part 2.
The fiber web that is transported on mesh-supported parts 210 100 exists because gravity, fiber 101 to the face side shifting of the face opposition side of the injected fluid that mainly constitutes by gas, near the fiber spacing at the position of the face side of this opposition side from the tendency that narrows down.On the other hand, exist along with the face side near the injected fluid that mainly is made of gas, fiber spacing is from the tendency that enlarges.
In addition, because the further injected fluid that mainly is made of gas, the fiber 101 of close mesh-supported parts 210 sides is pushed to this mesh-supported parts 210, tend to parallel with mesh-supported parts 210, in view of the above, fiber spacing is from further narrowing down, and fiber is intensive easily each other.Like this, if under such state, carry out baker processing etc., then fiber is each other by thermal welding, and the free degree of fiber 101 reduces, and interfibrous spatial area rate reduces.
On the other hand, along with face side from the injected fluid that mainly constitutes by gas of the face convergence of mesh-supported parts 210 sides, fiber each other can be by excessive conquassation, in addition, at convex shaped part, the injected fluid that mainly is made of gas collides mesh-supported parts 210 and is rebounded, and in view of the above, convergence fiber 101 partly becomes vertically with respect to these mesh-supported parts 210.By under such state, fiber is thermal welding each other, and fiber 101 frees degree of the face side of the injected fluid that mainly is made of gas of convex shaped part 2 improve, and interfibrous spatial area rate improves.
Here, the spatial area rate is meant the gross area with respect to unit are, does not have the ratio of the spatial area of fiber.In addition, the assay method of spatial area rate is as follows.
Measure the digit microscope VHX-100 that machine uses Keyemce (Keyence) corporate system.At first, (1) on observation platform, be length direction with direction along slot part 1 and convex shaped part 2, sample is arranged on measures on the machine, (2) on the summit of convex shaped part 2, the face of face of being given prominence to from convex shaped part 2 and the face opposition side given prominence to convex shaped part 2 begins to carry out respectively following mensuration.
(3) set the lens multiplying power of mensuration machine and the multiplying power on the computer picture rightly, the focus of lens is focused on the fiber (fiber that flies to is at random nearby removed) of the nearest front side of sample.Then, (4) appropriate photography degree of depth (depth) of setting, the 3D that makes sample draws a portrait.
(5) the 3D portrait is converted to the 2D portrait, makes the volume complanation of setting, the interfibrous space in specific its scope.And then (6) carry out the binary bit processing at 2D portrait, makes the position that has fiber be white, and non-existent part is a black.(7) make the position that does not have fiber be white color inversion then, measure the area of whitening etc.
Here, in this programme, making multiplying power is 300 times, and the photography degree of depth is 220 μ m (per 20 μ m photography is once photographed 11 times altogether), measures n=10, averages.
In addition, the spatial area rate is calculated by following mode.
Spatial area rate (%)=(the space gross area (mm 2)/measurement range area (mm 2)) X100.
Here, the space gross area can be calculated by (enlargement ratio during the space gross area during mensuration/mensuration), and in addition, the measurement range area can be calculated by (enlargement ratio during the measurement range area during mensuration/mensuration).
Because agree that the spatial area rate is high more, fiber spacing is from big more coarse more, so the motion of fiber is easy, and free degree height.Have, with respect to by opening processing etc., fiber spacing is from partly wide such nonwoven fabric again, the spatial area height in each space, and in view of the above, the fiber spacing of the integral body of the face of the injected fluid that mainly is made of gas of nonwoven fabric is from wide.Therefore, for example, this nonwoven fabric is being used under the situation of absorbent commodity etc., the resistance the when liquid that can integrally reduce the regulation of excreta etc. sees through this nonwoven fabric 110 can make liquid easily to transfers such as absorbers.
Here, the spatial area in each space is meant the ratio of the gross area in the space that does not have fiber in the scope of regulation with respect to the space number that does not have fiber.Can calculate by following formula.
Spatial area (mm 2/)=(the space gross area (mm 2)/space number (individual))
The spatial area rate that the face of the side of being given prominence to from this convex shaped part 2 of convex shaped part 2 is measured and can be presented as for example more than 5% from the difference of the spatial area rate of the face mensuration of the face opposition side give prominence to this convex shaped part 2, good is 5 to 80%, is more preferably 15 to 40%.
In addition, the spatial area rate that the face of the side of being given prominence to from convex shaped part 2 is measured can be presented as more than 50% for example, and good is 50 to 90%, is more preferably 50 to 80%.
Have, the spatial area in each space that the face of the side of being given prominence to from convex shaped part 2 is measured can be presented as 3000 μ m for example again 2More than, that good is 3000 to 30000 μ m 2, be more preferably 5000 to 20000 μ m 2
[1.4] weight per unit area
The average weight per unit area of nonwoven fabric 110 integral body can be presented as 10 to 200g/m particularly for example 2, good is 20 to 100g/m 2This nonwoven fabric 110 is being used under the situation of the surface patch of absorbent commodity for example, is comparing 10g/m at average weight per unit area 2Under the little situation, have in use damaged easily situation.In addition, the average weight per unit area at this nonwoven fabric 110 compares 200g/m 2Under the big situation, there is the situation be difficult to make swimmingly the liquid that had to shift downwards.
As Fig. 2 A, Fig. 2 B and shown in Figure 3, slot part 1 is adjusted to convex shaped part 2 and compares, and the weight per unit area of fiber 101 is low.In addition, the weight per unit area of slot part 1 is adjusted to low with on average comparing of the average weight per unit area that comprises the slot part 1 and the integral body of convex shaped part 2.Specifically, the weight per unit area of the bottom of slot part 1 can express 3 to 150g/m for example 2, good is 5 to 80g/m 2Weight per unit area in the bottom of this slot part 1 compares 3g/m 2Under the low situation, for example be used under the situation of surface patch of absorbent commodity, have the damaged easily situation of surface patch in the use of absorbent commodity at this nonwoven fabric.In addition, the weight per unit area in the bottom of this slot part 1 compares 150g/m 2Under the high situation, the liquid that exists this slot part 1 to be had is difficult to shift downwards, and is trapped in slot part 1, brings the possibility of damp to the user.
Convex shaped part 2 is adjusted to slot part 1 and compares as above-mentioned, the average weight per unit area height of fiber 101.The weight per unit area of the central portion 9 of convex shaped part 2 for example can be presented as 15 to 250g/m for example 2, good is 20 to 120g/m 2Weight per unit area at this central portion 9 compares 15g/m 2Under the low situation, because at deadweight, the external pressure of the contained liquid of this central portion 9, not only easily by conquassation, and, also exist the liquid that once absorbs adding the situation of returning easily of depressing.In addition, the weight per unit area at central portion 9 compares 250g/m 2Under the high situation, exist the liquid that is had to be difficult to shift downwards, liquid holdup brings the situation of damp at this central portion 9 to the user.
Have again, can adjust arbitrarily according to the amount of the fluid (for example hot blast) that mainly constitutes by gas, all conditions of being applied to the tension force etc. of nonwoven fabric 110 as the weight per unit area of the sidepiece 8 of the sidepiece of this convex shaped part 2.Specifically, the weight per unit area of this sidepiece 8 can be presented as 20 to 280g/m for example 2, good is 25 to 150g/m 2Weight per unit area at this sidepiece 8 compares 20g/m 2Under the low situation, exist owing to be applied to the tension force of width, the situation that sidepiece 8 is stretched.In addition, the weight per unit area at this sidepiece 8 compares 280g/m 2Under the high situation, exist because the liquid that this sidepiece 8 is had is difficult to shift downwards, and be trapped in sidepiece 8, bring the possibility of damp to the user.
In addition, the weight per unit area of the bottom of slot part 1 is adjusted to lower than the average weight per unit area of convex shaped part 2 integral body that are made of sidepiece 8 and central portion 9.For example, the weight per unit area of the bottom of slot part 1 can be expressed average weight per unit area with respect to convex shaped part 2 for example below 90%, and good is 3 to 90%, is more preferably 3 to 70%.The weight per unit area of the bottom of slot part 1 with respect to the average weight per unit area of convex shaped part 2 than 90% high situation under, drop into the resistance height of liquid when shift the below of nonwoven fabric 110 of slot part 1, the situation that exists liquid to overflow from slot part 1.In addition, the weight per unit area of the bottom of slot part 1 with respect to the average weight per unit area of convex shaped part 2 than 3% low situation under, for example, be used at this nonwoven fabric under the situation of surface patch of absorbent commodity, exist the damaged easily situation of surface patch in the use of absorbent commodity.
[1.5] other
In order to absorb or to see through the liquid of regulation and use under the situation of nonwoven fabric of present embodiment, because slot part 1 sees through liquid, convex shaped part 2 is vesicular structures for example, so, be difficult to keep liquid.
Slot part 1 is because the fibre density of fiber 101 is low, and weight per unit area is few, so, be to be fit to article that liquid is seen through.Have again, because the fiber 101 of the bottom of slot part 1 is in the width orientation, so, can prevent the length direction excess flow of liquid, widely diffusion at slot part 1.Because slot part 1 is low irrelevant with weight per unit area, with the width orientation (CD orientation) of fiber 101 at this slot part 1, so, improved the intensity (CD intensity) of the width of nonwoven fabric.
Though be adjusted to the weight per unit area height of convex shaped part 2,, in view of the above, because the number of fiber increase, so fusion quantity increases, and has kept vesicular structure.
In addition, at slot part 1, the containing ratio of the horizontal directional fiber of per unit area is than central portion 9 height, and at sidepiece 8, the containing ratio of the vertical directional fiber of per unit area is than central portion 9 height.Then, at central portion 9, contain than slot part 1, sidepiece more than 8 at the fiber 101 of thickness direction orientation.In view of the above,, reduced the thickness of convex shaped part 2, under the situation that has discharged load, also because its rigidity at the fiber 101 of thickness direction orientation returns to original height easily even by applying for example load to central portion 9.That is, can form the high nonwoven fabric of compression and back renaturation.
[1.6] manufacture method
As Fig. 4 A, Fig. 4 B to shown in Figure 9, below, the method for the nonwoven fabric 110 of making present embodiment is described.At first, fiber web 100 is positioned in upper face side as the mesh-supported parts 210 of aeration support component.In other words, mesh-supported parts 210 support fiber web 100 from downside.
Then, as shown in Figure 5, the mesh-supported parts 210 of the state that has supported this fiber web 100 are moved in prescribed direction,, in view of the above, can make the nonwoven fabric 110 of present embodiment from the upper face side of this fiber web that moves 100 gas jet continuously.
Here, mesh-supported parts 210 are to form by a plurality of metal wires 211 that inweave as the regulation rugosity of stuffiness portion.Inweave a plurality of metal wires 211 by separating predetermined distance, can access the mesh-supported parts that formed a plurality of hole portions 213 as ventilating part.
The mesh-supported parts 210 of Fig. 4 A, Fig. 4 B are the parts that formed the little hole portion 213 in a plurality of apertures, and the gas that sprays from the upper face side of fiber web 100 does not hamper this mesh-supported parts 210, are vented to the below.These mesh-supported parts 210 do not change injected gas flow greatly, in addition, fiber 101 are moved to the following direction of these mesh-supported parts.
Therefore, the gas of fiber 101 by mainly spraying from upper face side of fiber web 100 moves in prescribed direction.Specifically, because be limited, so fiber 101 moves in the surperficial such direction along these mesh-supported parts 210 to the mobile of lower side of mesh-supported parts 210.
The fiber 101 in the zone of for example, injected gas is to moving with this zone adjacent areas.Then, move in prescribed direction in the zone of injected gas, and therefore, consequently, fiber 101 is to moving with the zone in the side in the continuous zone of prescribed direction of injected gas.
In view of the above, form slot part 1, simultaneously, the fiber 101 of the bottom of slot part 1 moves, in the width orientation.In addition, form convex shaped part 2 between slot part 1 and slot part 1, the fibre density of the side portion of this convex shaped part 2 improves, and fiber 101 is directed at length direction etc.
Here, the non-woven cloth manufacturing device 90 of nonwoven fabric 110 of making first embodiment is as Fig. 6, shown in Figure 7, have from face side support spray mainly as the aeration support component 200 of the fiber web 100 of fiber assembly with from the fiber web 100 that another face side direction as the fiber web 100 of this fiber assembly is supported from an above-mentioned face side by aeration support component 200 as fiber assembly the fluid that constitutes by gas as the ejection portion 910 of injection member and the not shown air feed part that goes out.
Here, nonwoven fabric 110 is that one side is passed through mobile member in non-woven cloth manufacturing device 90, and moving web 100 successively, and one side forms.This mobile member makes the fiber web 100 as fiber assembly of the state that supported from face side by above-mentioned aeration support component 200 move to prescribed direction.Specifically, make injected and have mainly the fiber web 100 of the state of the fluid that constitutes by gas move at prescribed direction F.As mobile member, can express conveyer for example shown in Figure 6 930 for example.Conveyer 930 has the aeration belt portion 939 and the rotating part 931,933 of aeration, and these aeration belt portion 939 mounting aeration support components 200 are formed the ring-type of horizontal length; This rotating part 931,933 is configured in the two ends of length direction in the inboard of the aeration belt portion 939 of the ring-type that is formed horizontal length, and the aeration belt portion 939 of this ring-type is rotated in prescribed direction.
Aeration support component 200 can be changed rightly according to the nonwoven fabric of making.For example, under the situation of the nonwoven fabric 110 of making present embodiment, can use above-mentioned mesh-supported parts 210 as aeration support component 200.
Conveyer 930 is as above-mentioned, and the aeration support component 200 (mesh-supported parts 210) that has supported the state of fiber web 100 from following side is moved at prescribed direction F.Specifically, as shown in Figure 6, fiber web 100 moves in the mode of the downside by ejection portion 910.And then fiber web 100 is to move by the mode as the inside of the heater portion 950 of the two sides opening of heater.
Injection member shown in Figure 8 has not shown air feed part and the ejection portion 910 that goes out.The not shown air feed part that goes out links with ejection portion 910 by snorkel 920.Snorkel 920 can be connected the upside of ejection portion 910 with ventilating.As shown in Figure 9, in ejection portion 910, form a plurality of ejiction openings 913 with predetermined distance.
Never the air feed part that illustrates is by supply gas a plurality of ejiction openings 913 ejections of gas from forming in ejection portion 910 of ejection portion 910 of snorkel 920.Be ejected into continuously by the upper face side of aeration support component 200 (mesh-supported parts 210) from the gas of a plurality of ejiction opening 913 ejections from the fiber web 100 of following side support.Specifically, be ejected into the upper face side of the fiber web 100 of the state that moves at prescribed direction F by conveyer 930 continuously from the gas of a plurality of ejiction openings 913 ejections.
Below ejection portion 910,915 pairs of the suction unit of downside that are configured in aeration support component 200 (mesh-supported parts 210) are from 910 ejections of ejection portion, and carry out air-breathing at the gas of aeration support component 200 (mesh-supported parts 210) ventilation etc.Here, by this suction unit 915 carry out air-breathing, can also position, fiber web 100 is laid on the aeration support component 200 (mesh-supported parts 210).
The attraction of suction unit 915 is so long as the fiber 101 in the zone of the injected fluid that mainly is made of gas is pushed to the intensity of the degree of aeration support component 200 (mesh-supported parts 210) gets final product.Attract (air-breathing) by the main fluid that constitutes by gas that this suction unit 915 is sprayed, can prevent with the stuffiness portion of aeration support component 200 (for example, the metal wire 211 of mesh-supported parts 210) the main fluid that is made of gas of collision rebounds, and upsets the shape of fiber web 100.In addition, can under the state of the shape of further having guaranteed slot part (concavo-convex) etc., in heater portion 950, transport by the air flow moulding.In this case, good is when carrying out moulding by air flow, and one side is air-breathing, and one side is transported to heater portion 950.
Have again, because introduce the fluid that mainly constitutes by gas by downside from aeration support component 200 (mesh-supported parts 210), the fiber in the zone of the injected fluid that mainly is made of gas simultaneously is pushed to this aeration support component 200 (mesh-supported parts 210) side, one side moves, so fiber collects in aeration support component 200 (mesh-supported parts 210) side.In addition, in convex shaped part 2, rebounded, become fiber 101 partly towards the state of thickness direction by the stuffiness portion (for example, the metal wire 211 of mesh-supported parts 210) of the injected fluid collision aeration support component 200 that mainly constitutes by gas.
Respectively from the temperature of the fluid that mainly constitutes by gas of ejiction opening 913 ejection as above-mentioned, so long as normal temperature gets final product, but, for example in order to make the good forming ability of slot part (concavo-convex) etc., can adjust to more than the softening point of the fiber of thermoplasticity at least that constitutes fiber assembly, good is to adjust to more than the softening point, fusing point+50 ℃ to-50 ℃ temperature.If because fiber softening, then the reaction force of fiber itself reduces, so, guarantee the shape that fiber is arranged by air flow etc. again easily.Because if further improve temperature, then fiber thermal welding each other begins.So, further guarantee the shape of slot part (concavo-convex) etc. easily.In view of the above, under the state of the shape of having guaranteed slot part (concavo-convex) etc., be transported to easily in the heater portion 950.
In addition, the air quantity by the fluid that mainly is made of gas that adjust to spray, temperature, introducing amount, the aeration of aeration support component 200, the weight per unit area of fiber web 100 etc. can make the change of shape of convex shaped part 2.For example, amount approximate equality at the fluid that mainly constitutes by gas of the amount of the fluid that mainly constitutes by gas that sprays and attraction (air-breathing), perhaps attract under the many situations of the amount of the fluid that mainly is made of gas of (air-breathing), the inside side of the convex shaped part 2 of nonwoven fabric 115 (nonwoven fabric 110) is formed in the mode along the shape of aeration support component 200 (mesh-supported parts 210).Therefore, under aeration support component 200 (mesh-supported parts 210) was smooth situation, the inside side of this nonwoven fabric 115 (nonwoven fabric 110) was a general planar.
In addition, for under the state of the shape of further having guaranteed the slot part (concavo-convex) by the air flow moulding, transport to heater portion 950, can just finish back or while in the moulding of the slot part (concavo-convex) that air flow carries out transports in heater portion 950, perhaps after the moulding of slot part (concavo-convex) that hot blast (air flow of set point of temperature) carries out etc. has just finished, by the cold wind cooling, then, transport to heater portion 950.
As the heater portion 950 of heater its at the two ends of prescribed direction F by opening.In view of the above, formed heating space is detained the stipulated time to the fiber web 100 (nonwoven fabric 110) of mounting in the inside of heater portion 950 on the aeration support component 200 that moves by conveyer 930 (mesh-supported parts 210), moves continuously.For example, contain under the situation of thermoplasticity fiber, can access heating, the nonwoven fabric 115 (nonwoven fabric 110) that fiber 101 is bonded to each other by this heater portion 950 at the fiber 101 that constitutes fiber web 100 (nonwoven fabric 110).
Other embodiment
Below, other embodiment of nonwoven fabric of the present invention is described.In addition, in the embodiment below, do not have the part of special instruction identical, under the yet identical situation of the number that is labeled in accompanying drawing, mark identical number with first embodiment with first embodiment of nonwoven fabric.
Use Figure 10 to Figure 18, second embodiment to the, seven embodiments of nonwoven fabric of the present invention are described.Second embodiment is other a embodiment of the shape of relevant nonwoven fabric.The 3rd embodiment is other a embodiment of the shape of relevant nonwoven fabric.The 4th embodiment is other a embodiment of relevant nonwoven fabric and the face face opposition side that has formed convex shaped part and slot part.The 5th embodiment is other a embodiment of the convex shaped part of relevant nonwoven fabric.The 6th embodiment is other a embodiment of the opening of relevant nonwoven fabric.The 7th embodiment is other a embodiment of the slot part of relevant nonwoven fabric.
[2.1] second embodiments
By Figure 10, second embodiment of relevant nonwoven fabric of the present invention is described.
[2.1.1] shape
As shown in figure 10, the nonwoven fabric 114 of present embodiment is the nonwoven fabric of two sides general planar.Then, be the nonwoven fabric in different zone such as fiber alignment of having formed the regulation zone.Below, be that the center describes with difference with first embodiment.
[2.1.2] fiber alignment
As shown in figure 10, on nonwoven fabric 114, form the different a plurality of zones of containing ratio of vertical directional fiber.The different a plurality of zones of containing ratio of vertical directional fiber can be expressed for example in this nonwoven fabric 114, the vertical directed portion 13 that the containing ratio of vertical directional fiber is the highest, compare with vertical directed portion 13, the containing ratio of the central portion 12 that the containing ratio of vertical directional fiber is low, vertical directional fiber is minimum, and the highest horizontal directed portion 11 of the containing ratio of horizontal directional fiber.Then, on this nonwoven fabric 114,, form a plurality of vertical directed portions 13 respectively along each both sides of the directed portion of a plurality of horizontal strokes 11.Be this a plurality of vertical directed portion 13 each with the opposition side of the directed portion of horizontal stroke 11 sides, form a plurality of nonwoven fabric at a plurality of central portions 12 that clipped by adjacent vertical directed portion 13.
Horizontal directed portion 11 is by in fiber web 100, is directed onto the zone that the residual fiber in vertical directed portion 13 rear flank 101 forms at the fiber 101 as the orientated lengthwise of MD direction.Because towards the fiber 101 of length direction to vertical directed portion 13 side shiftings, so, in the directed portion 11 of horizontal stroke, mainly remain in horizontal directional fiber as the width orientation of transverse direction.Therefore, the great majority of the fiber 101 of horizontal directed portion 11 are in the width orientation as transverse direction.Though horizontal directed portion 11 is as described later, it is low to be adjusted to weight per unit area, because the major part of fiber 101 that should horizontal stroke orientation portion 11 is in the width orientation, so, the TENSILE STRENGTH raising of width.Then,, in wearing, be applied in the power of the friction etc. of width, also can have prevented breakage even for example under the situation of the surface patch that this nonwoven fabric 114 has been used in absorbent commodity.
In addition, vertical directed portion 13 is in fiber web 100, and the fiber 101 injected fluids that mainly are made of gas by towards length direction are ejected into vertical directed portion 13 sides and form.Then, because the majority of fiber 101 that should vertical directed portion 13 is in orientated lengthwise, so the fiber spacing that is formed each fiber 101 is from constriction, fibre density improves.Therefore, the rigidity that is formed vertical directed portion 13 improves.
[2.1.3] fiber density
As shown in figure 10, because the injected fluid that mainly is made of gas, the fiber 101 of horizontal directed portion 11 moves, so by injected pressure, fiber 101 also moves, concentrates to the downside of the thickness direction of nonwoven fabric 114.Therefore, the value of its spatial area rate of the upside of the thickness direction of nonwoven fabric 114 is big, and the value of lower side space area occupation ratio is little.In other words, the upside fibre density of the thickness direction of nonwoven fabric 114 is little, downside fibre density height.
In addition, horizontal directed portion 11 is by the injected fluid that mainly is made of gas, and fiber 101 moves, and the mode low with fibre density forms.Because vertical directed portion 13 becomes the zone that the fiber 101 that moves from the directed portion 11 of horizontal stroke is concentrated, so, be formed with the directed portion 11 of horizontal stroke and compare the fibre density height.The fibre density of central portion 12 is formed in the fibre density of horizontal directed portion 11 and indulges in the middle of the fibre density of directed portion 13.
[2.1.4] weight per unit area
As shown in figure 10, because because the fluid that mainly constitutes by gas that directed sidelong portion 11 sprays, fiber 101 moves to other zone, so the weight per unit area of horizontal directed portion 11 is minimum.In addition, because be sprayed onto the fiber 101 that moves from the directed portion 11 of horizontal stroke, so vertical directed portion 13 weight per unit areas are the highest.Then, clip both sides, form central portion 12 in this vertical directed portion 13.Promptly, because become the central portion 12 in the few zone of weight per unit area, horizontal directed portion 11 is formed by the mode of supported on both sides with the high vertical directed portion 13 of weight per unit area, so,, for example also can suppress because the situation that the tension force that applies at width is stretched even weight per unit area is low.
[2.1.5] other
This nonwoven fabric 114 is for example under the situation that the surface patch as absorbent commodity uses, can be under the state of keeping the horizontal directed portion 11 of the low state of weight per unit area, central portion 12, that is, can not be by under the state of the tension force stretching that width applies, using in the goods manufacturing.Then, because between each of the directed portion 11 of horizontal stroke, central portion 12, form the high high directed portion 14 of weight per unit area, so, when containing liquid etc., be difficult to take place this nonwoven fabric 114 because the weight of liquid, deadweight and by the situation of conquassation.Therefore, even drained liquid repeatedly also can make liquid not in surface diffusion into the surface, and shift to the below of this nonwoven fabric 114.
[2.1.6] manufacture method
Below, the method for the nonwoven fabric 114 of making present embodiment is described.At first, fiber web 100 is positioned in upper face side as the mesh-supported parts 210 of aeration support component 200.In other words, by mesh-supported parts 210, support fiber web 100 from downside.These mesh-supported parts 210 can use the mesh-supported parts identical with the mesh-supported parts 210 of first embodiment.
Then, the mesh-supported parts 210 of the state that has supported this fiber web 100 are moved in prescribed direction, the upper face side by the fiber web 100 that moves from this is gas jet continuously, can make the nonwoven fabric 114 of present embodiment.
Be ejected into this nonwoven fabric 114 the fluid that mainly constitutes by gas amount so long as the fiber 101 of the fiber web 100 in the zone of the injected fluid that mainly constitutes by gas can get final product in the degree that width moves.In this case, though good is not undertaken air-breathing by the suction unit 915 that the injected fluid that mainly is made of gas is drawn into the downside of mesh-supported parts 210, but, also can carry out air-breathing with the degree that the directed portion 11 of horizontal stroke is not pushed to mesh-supported parts 210.
In addition, also can spray the fluid that mainly constitutes by gas, form concavo-convex nonwoven fabric with for example slot part, convex shaped part 2 etc. after, by being wound in roller etc., with the concavo-convex conquassation that forms.
Like this, the power of pushing fiber 101 to mesh-supported parts 210 sides can not form concavo-convex at least yet, but forms the roughly certain nonwoven fabric 114 of thickness.
The nonwoven fabric 114 of present embodiment can be made by non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 114 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
[2.2] the 3rd embodiments
By Figure 11, Figure 12, the 3rd embodiment of nonwoven fabric of the present invention is described.
[2.2.1] nonwoven fabric
As Figure 11 and shown in Figure 12, it is different with first embodiment that the mode that the nonwoven fabric 116 of present embodiment intersects at length direction with the integral body of this nonwoven fabric 116 alternatively has the fluctuating this respect.Below, be that the center describes with difference with first embodiment.
The nonwoven fabric 116 of present embodiment is formed these nonwoven fabric 116 integral body and has flexuosity at the length direction as the MD direction.
[2.2.2] manufacture method
Though the method and first embodiment about the nonwoven fabric 116 of making present embodiment are same,, as the form difference of the mesh-supported parts 260 of aeration support component.The mesh-supported parts 260 of present embodiment form by a plurality of metal wires 261 that inweave as the regulation rugosity of stuffiness portion.Separate predetermined distance by a plurality of metal wires 261 and inweaved, can access the mesh-supported parts 260 that are formed with a plurality of hole portions 263 as ventilating part.
Have, these mesh-supported parts 260 for example as shown in figure 12, are formed in the direction parallel with axle Y and alternatively have flexuosity in the present embodiment again.It is the support component that has flexuosity in any one parallel direction with the length direction of these mesh-supported parts 260 or short side direction.
The mesh-supported parts 260 of Figure 12 are the parts that are formed with the little hole portion 263 in a plurality of apertures, and the gas that sprays from the upper face side of fiber web 100 does not hamper this mesh-supported parts 260, are vented to the below.Flowing of the fluid that mainly is made of gas that these mesh-supported parts 260 change to spray greatly in addition, do not make fiber 101 move to the following direction of these mesh-supported parts 260.
Have again, because these mesh-supported parts 260 itself have flexuosity, so by the fluid that mainly is made of gas that the upper face side from fiber web 100 sprays, fiber web 100 is formed as has the shape that rises and falls like that along the shape of these mesh-supported parts 260.
Spray the fluid that mainly is made of gas by a fiber web 100 towards mounting on mesh-supported parts 260, one side makes this fiber web 100 move along the axle directions X, can form this nonwoven fabric 116.
The sample attitude of the fluctuating of mesh-supported parts 260 can at random be set.For example, the spacing that can express for example between the top of fluctuating to the axle directions X shown in Figure 12 is 1 to 30mm, and good is 3 to 10mm.In addition, the top of the fluctuating of these mesh-supported parts 260 and the difference of height of bottom for example can express 0.5 to 20mm for example, and good is 3 to 10mm.Have again, the cross sectional shape of the axle directions X of these mesh-supported parts 260 as shown in figure 12, be not limited to wavyly, can express for example with each summit of the top and bottom that rise and fall and be shape that the mode general triangular of acute angle links to each other, be the roughly dimetric concavo-convex shape that links to each other of mode etc. of general planar with each summit of the top and bottom of fluctuating.
The nonwoven fabric 116 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 116 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
[2.3] the 4th embodiments
By Figure 13, the 4th embodiment of nonwoven fabric of the present invention is described.
As shown in figure 13, the nonwoven fabric 140 of present embodiment is different with first embodiment with the sample attitude of the face of the opposition side of the face that is formed with slot part 1 and convex shaped part 2 of this nonwoven fabric 140.Below, be that the center describes with difference with first embodiment.
[2.3.1] nonwoven fabric
The nonwoven fabric 140 of present embodiment is formed with slot part 1 and convex shaped part 2 alternately side by side in its one side side.Then, in the another side side of nonwoven fabric 140, the inside of convex shaped part 2 forms in a side-prominent mode of being given prominence to this convex shaped part 2.In other words, nonwoven fabric 140 is in the another side side of this nonwoven fabric 140, is equivalent to the area depression of bottom surface of the convex shaped part 2 of this one side side, forms recess.Then, the zone of bottom surface of slot part 1 that is equivalent to this one side side is outstanding relatively, forms convex shaped part.
[2.3.2] manufacture method
The manufacture method of the nonwoven fabric 140 of present embodiment is identical with the record of the first above-mentioned embodiment.The support component that uses when in addition, making this nonwoven fabric 140 can use the support component identical with the mesh-supported parts 210 of the first above-mentioned embodiment.
In the present embodiment, fiber web 100 is positioned on the mesh-supported parts 210, one side is sprayed the fluid that mainly is made of gas, one side makes this fiber web 100 move along the direction of regulation, simultaneously, the fluid that mainly constitutes that is sprayed from the below attraction (air-breathing) of mesh-supported parts 210 by gas.Then, make the amount of the fluid that mainly constitutes by gas of attraction (air-breathing) less than the amount of the fluid that mainly constitutes by gas that sprays.Under the situation of the main fluid that constitutes by gas greater than the amount of the main fluid that constitutes by gas that attracts (air-breathing) of spraying, the fluid that mainly is made of gas that sprays for example conflicts with mesh-supported parts 210 as aeration support component 200, some are rebounded, and it is mainly passed by fluid side direction upper face side below convex shaped part 2 that gas constitutes.Therefore, the following side (bottom surface side) of convex shaped part 2 is to form to the upper face side of convex shaped part 2 and the convex shaped part 2 identical outstanding modes of direction.
The nonwoven fabric 140 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 140 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
[2.4] the 5th embodiments
By Figure 14, the 5th embodiment of nonwoven fabric of the present invention is described.
As shown in figure 14, the nonwoven fabric 150 of present embodiment is formed with the second different convex shaped part 22 of height with the convex shaped part 2 that forms in the one side side of this nonwoven fabric 150, and this point is different with first embodiment.Below, be that the center describes with difference with first embodiment.
[2.4.1] nonwoven fabric
The nonwoven fabric 150 of present embodiment is the nonwoven fabric that is formed with a plurality of slot parts 1 in the one side side of this nonwoven fabric 150 side by side.Then, alternatively form a plurality of convex shaped parts 2 and a plurality of second convex shaped part 22 at a plurality of slot parts of being formed 1 respectively between each.This convex shaped part 2 and second convex shaped part 22 similarly form side by side with slot part 1.
The convex shaped part 2 and second convex shaped part 22 are zones that do not have the injected fluid that mainly is made of gas of fiber web 100, are by forming slot part 1, becoming the convex shaped part in relatively outstanding zone.This second convex shaped part 22 for example is formed and compares with convex shaped part 2, and the height of the thickness direction of this nonwoven fabric 150 is low, and the length of width is also little.Fiber density, fiber alignment and weight per unit area etc. for this second convex shaped part 22 similarly form with convex shaped part 2.
The convex shaped part 2 of nonwoven fabric 150 and the configuration of second convex shaped part 22 are between each, to form the convex shaped part 2 or second convex shaped part 22 at a plurality of slot parts of forming side by side 1.Then, convex shaped part 2 is to be formed across slot part 1 mode adjacent with second convex shaped part 22.Second convex shaped part 22 is to be formed across slot part 1 and convex shaped part 2 adjacent modes.Specifically, be to form according to convex shaped part 2, slot part 1, second convex shaped part 22, slot part 1, convex shaped part 2 such reiterations.That is, the convex shaped part 2 and second convex shaped part 22 alternatively form across slot part 1.In addition, the position of the convex shaped part 2 and second convex shaped part 22 relation is not limited thereto, and can be that the part of nonwoven fabric 150 at least forms across the adjacent respectively mode of slot part 1 with a plurality of convex shaped parts 2.In addition, also can be to form across the adjacent respectively mode of slot part 1 with a plurality of second convex shaped parts 22.
With regard to the fiber alignment and fibre density of second convex shaped part 22, same with the convex shaped part 2 of this nonwoven fabric 150, the weight per unit area of sidepiece 88 that vertical directional fiber by slot part 1 is directed onto sidepiece 88, the second convex shaped parts 22 of second convex shaped part 22 forms highly.Have again, this sidepiece 88 its as the amount of the vertical directional fiber of the orientated lengthwise of MD direction than many in amount as the horizontal directional fiber of the width orientation of transverse direction.In addition, in second convex shaped part 22,, be formed weight per unit area height than slot part 1 though that the central portion 99 that is clipped by sidepiece 88 is formed is lower than this sidepiece 88 weight per unit areas.
[2.4.2] manufacture method
Though the manufacture method of the nonwoven fabric 150 of present embodiment is identical with the record of first embodiment, the sample attitude difference of the ejiction opening 913 of the non-woven cloth manufacturing device 90 that in the manufacturing of nonwoven fabric 150, uses.
By one towards be positioned in mesh-supported parts 260 above fiber web 100 spray the fluid that mainly constitutes by gas, one side makes it to move in prescribed direction, forms nonwoven fabric 150.Though when spraying mainly the fluid that constitutes by gas, form slot part 1, convex shaped part 2 and second convex shaped part 22, but their formation can at random be changed according to the sample attitude of the ejiction opening 913 of the fluid that mainly is made of gas of non-woven cloth manufacturing device 90.
As shown in figure 14, form this nonwoven fabric 150, can be for example the interval of ejiction opening 913 by adjusting the fluid that ejection mainly is made of gas carry out.For example, narrower by the interval that makes ejiction opening 913 than the interval of the ejiction opening 913 of first embodiment, can form with convex shaped part 2 and compare, second convex shaped part 22 that the height of thickness direction is low.In addition, wideer by the interval that makes ejiction opening 913 than the interval of the ejiction opening 913 of first embodiment, can also form with convex shaped part 2 and compare the convex shaped part that the height of thickness direction is high.Like this, by at the interval that forms ejiction opening 913,, form this nonwoven fabric 150 that the convex shaped part 2 and second convex shaped part 22 alternatively dispose side by side across slot part 1 with narrow interval and wide interval alternant way configuration.The interval of this ejiction opening 913 is not limited thereto, can according to want to form the height of the convex shaped part of nonwoven fabric and with the arrangement of second convex shaped part 22, at random form.
The nonwoven fabric 150 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 150 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
[2.5] the 6th embodiments
By Figure 15, Figure 16, the 6th embodiment of nonwoven fabric of the present invention is described.
As shown in figure 15, the nonwoven fabric 160 of present embodiment does not form slot part and convex shaped part, but forms a plurality of peristomes 3, and this point is different with first embodiment.Below, just the difference with first embodiment describes.
[2.5.1] nonwoven fabric
As shown in figure 15, the nonwoven fabric 160 of present embodiment is not form slot part and convex shaped part, but is formed with the nonwoven fabric of a plurality of peristomes 3.
Length direction along as this fiber web 100 of the direction of for example spraying mainly from the fluid that is made of gas to the fiber web 100 as fiber assembly roughly equally spaced forms a plurality of peristomes 3.In addition, the interval of the width of fiber web 100 also roughly equally spaced forms a plurality of peristomes 3.Here, the interval that forms peristome 3 is not limited thereto, and also can be for example to form according to each different interval.
Each is formed circular or substantially elliptical this a plurality of peristome 3.Then, each fiber 101 of a plurality of peristome 3 is with the mode orientation around peristome 3.That is, the end of the length direction of peristome 3 is in this width orientation, and in addition, the sidepiece of the length direction of peristome 3 is with the mode orientation along this length direction.
In addition, because the fluid that mainly gas be made of of the fiber 101 on every side of these a plurality of peristomes 3 by spraying moves around peristome 3, so the fibre density on every side of this peristome 3 is adjusted to the fibre density height than other zone.
Then, at the thickness direction of this nonwoven fabric 160, be formed with and Figure 16 A and B shown in the fibre density of face (top) of opposition side of the tangent face of support component 220 than low with the fibre density of tangent face (following) side of support component 220.This is that the fiber 101 that has the free degree in fiber web 100 concentrates on support component 220 sides because of the fluid that mainly is made of gas owing to gravity or injection.
[2.5.2] manufacture method
Though the manufacture method of present embodiment is identical with the manufacture method of above-mentioned first embodiment,, in this nonwoven fabric 160, this point of slot part and convex shaped part is different not forming.Below, be that the center describes with difference with first embodiment.
The support component 220 as aeration support component 200 that is used to form nonwoven fabric shown in Figure 15 160 for example can be expressed support component 220 as shown in Figure 16 for example.That is, be on the mesh-supported parts 210 of Fig. 4, with the predetermined distance almost parallel disposing the support component of a plurality of elongate parts 225.Elongate parts 225 are parts of stuffiness, for example, do not make from the fluid that mainly is made of gas of upper side injection and ventilate to the lower side.Then, main its flow direction of fluid that is made of gas that is ejected into elongate parts 225 is changed.
Then, fiber web 100 is positioned on the support component 220, the support component 220 of the state that is supporting fiber web 100 is moved in prescribed direction,, in view of the above, can make this nonwoven fabric 160 from the upper face side of the fiber web 100 that moves gas jet continuously.
Specifically, by spraying the fluid that mainly constitutes continuously, do not form the slot part and the convex shaped part of first embodiment, but form peristome 3 by gas.Here, fluid comprises the fluid that mainly is made of gas of injection and/or the fluid that mainly is made of gas that sprays, and just in fiber web 100 ventilations, simultaneously, has been changed the fluid that mainly is made of gas of the direction that flows by elongate parts 225.
In addition, be ejected into this nonwoven fabric 160 the fluid that mainly constitutes by gas amount so long as the degree that the fiber 101 of the fiber web 100 in the zone of the injected fluid that mainly is made of gas can move get final product.In this case, the suction unit 915 that also can not introduce the downside of support component 220 by the main fluid that is made of gas that will spray attracts (air-breathing).Under the situation of the fluid that attracts (air-breathing) mainly to constitute by suction unit 915 by gas, because the injected main supported parts 220 of fluid that are made of gas rebound, do not upset the shape of the fiber web 100 of moulding, so good is, and to attract the amount of (air-breathing) be the amount that fiber web 100 is not pushed to the degree of support component 220 (not by conquassation).
In addition, can also spray the fluid that mainly constitutes by gas, formed have concavo-convex nonwoven fabric after, be wound up into roller etc., with the concavo-convex conquassation that forms.
In addition, as other manufacture method,, can use tabular dish with ventilating part as support component.Specifically, fiber web 100 is positioned on the tabular dish, one side makes this support component of the state that is supporting fiber web 100 move in prescribed direction, and one side is sprayed the fluid that mainly is made of gas off and on, in view of the above, can make this nonwoven fabric 160.
Because the integral body of the dish that this is tabular becomes stuffiness portion, so the fluid that mainly is made of gas that sprays off and on forms peristome 3 with the main fluid that is made of gas that its flow direction has been changed.In other words, the part at the injected fluid that mainly is made of gas forms peristome 3.
The nonwoven fabric 160 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 160 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
[2.6] the 7th embodiments
By Figure 17 and Figure 18, the 7th embodiment of nonwoven fabric of the present invention is described.
As Figure 17 and shown in Figure 180, the nonwoven fabric 170 of present embodiment forms depressed part 3A and protuberance 4A in the slot part 1 of the one side side that is formed at this nonwoven fabric 170, and this point is different with first embodiment.Below, be that the center describes with difference with first embodiment.
[2.6.1] nonwoven fabric
As shown in figure 17, the nonwoven fabric 170 of present embodiment is the nonwoven fabric that roughly uniformly-spaced is formed with a plurality of slot parts 1 in a face side of this nonwoven fabric 170 side by side.Then, form a plurality of convex shaped parts 2 at a plurality of slot part 1 respectively between each.Have, in slot part 1, roughly equally spaced form with slot part 1 and compare, a plurality of depressed part 3A in the sparse zone of conduct that fibre density is low between each, form a plurality of protuberance 4A as the zone beyond the sparse zone at these a plurality of depressed part 3A respectively.
In the present embodiment,, be not limited thereto, also can form with different intervals though depressed part 3A roughly equally spaced forms.Though in Figure 17, this depressed part 3A has represented opening, according to all conditions of amount, intensity and the introducing amount etc. of the fluid that mainly constitutes by gas that sprays and difference.
The height of the thickness direction of this nonwoven fabric 170 of depressed part 3A can be expressed below 90% of height of thickness direction of this nonwoven fabric of protuberance 4A for example, and good is 0 to 50%, is more preferably 0 to 20%.Here, highly be that 0% expression depressed part 3A is the situation of opening.
In addition, it all is 0.1 to 30mm that the length of the length direction of each depressed part 3A and the length of width can be expressed for example, and good is 0.5 to 10mm.Then, can express 0.5 to 30mm for example across the spacing of the mutual adjacent depressed part 3A of protuberance 4A, good is 1 to 10mm.
The height of the thickness direction of the nonwoven fabric 170 of protuberance 4A can express for example height with the thickness direction of the nonwoven fabric 170 of convex shaped part 2 identical or below, good is 20 to 100%, is more preferably 40 to 70%.
In addition, it is 0.1 to 30mm that the length of the length direction of this nonwoven fabric 170 of each this protuberance 4A and the length of width can be expressed for example, and good is 0.5 to 10mm.Then, the spacing across between the summit of the mutual adjacent protuberance 4A of depressed part 3A can express 0.5 to 30mm for example, and good is 1 to 10mm.
Then, the cross sectional shape of the length direction of this nonwoven fabric of protuberance 4A is four horn shapes roughly.In addition, the cross sectional shape of the length direction of protuberance 4A is not limited to roughly four horn shapes, also can be dome-shaped, trapezoidal shape, triangular shape, Ω shape etc., is not particularly limited.For the diffusion of the liquid of the regulation that suppresses slot part 1, with four horn shapes roughly for well.In addition, for fear of depressing at the outer of surplus, protuberance 4A contacts with skin etc. and brings foreign body sensation, and the end face of good is this protuberance 4A is plane or curved surface.
In addition, the cross sectional shape of the length direction of this nonwoven fabric of depressed part 3A can be the shape etc. of the counter-rotating up and down of dome-shaped, trapezoidal shape, Ω shape, four horn shapes or these shapes, is not particularly limited.In addition because be under the situation of opening at depressed part 3, even under the situation that has applied superfluous external pressure, have under the situation of liquid etc. of full-bodied regulation, also can suppress the diffusion of liquid of the regulation of slot part 1, so good.
Slot part 1 across the fiber alignment of the adjacent protuberance 4A of depressed part 3A as a whole, along the width orientation of slot part 1.
Under this depressed part 3A was situation as the peristome opening, in becoming the zone of this opening, by the injected fluid that mainly is made of gas, vertical directional fiber was directed onto convex shaped part 2 sides, and in addition, horizontal directional fiber is directed onto protuberance 4A side.Therefore, the fiber 101 on every side of opening is to surround the mode orientation on every side of this opening.Therefore, even under the situation that has been applied in external pressure etc., opening also is difficult to be blocked by conquassation.
The protuberance 4A of slot part 1 is formed the depressed part 3A height of fibre density than this slot part 1.
The convex shaped part 2 and the slot part 1 of the fibre density of depressed part 3A and protuberance 4A and first embodiment are same, can adjust arbitrarily according to the amount of the fluid that mainly is made of gas, all conditions of imposing on the tension force etc. of nonwoven fabric 110.In addition, depressed part 3A can not be an opening also.
The fibre density of depressed part 3A can be expressed at 0.20g/cm for example 3Below, good is 0.0 to 0.10g/cm 3Here, fibre density is 0.0g/cm 3Expression depressed part 3A is an opening.Compare 0.20g/cm in fibre density 3Under the big situation, the liquid that drops into the regulation of slot part 1 is trapped in depressed part 3A for the time being.
Like this, under the situation that this nonwoven fabric 170 is for example used as the surface patch of absorbent commodity etc., the regulation liquid holdup under the state of depressed part 3A, having under the situation that action changes etc., exist the liquid of regulation easily to overflow from depressed part 3A, in slot part 1 diffusion, and then, pollute the situation of skin in the surface diffusion into the surface of this nonwoven fabric 170.
In addition, the fibre density of protuberance 4A can be presented as 0.20g/cm for example 3Below, good is 0.005 to 0.20g/cm 3, be more preferably 0.007 to 0.10g/cm 3Fibre density at protuberance 4A compares 0.005g/cm 3Under the little situation, be applied in superfluous external pressure, convex shaped part 2 is existed this protuberance 4A too by conquassation by under the such situation of conquassation, can not remain on the situation in the space that slot part 1 forms by depressed part 3A.
On the other hand, the fibre density at protuberance 4A compares 0.20g/cm 3Under the big situation, at protuberance 4A, superfluous external pressure is applied to this nonwoven fabric 170 in the liquid holdup of the regulation that falls into slot part 1, and under situation that skin directly contacts, existence brings the situation of damp.
The depressed part 3A of slot part 1 is formed with convex shaped part 2 and protuberance 4A and compares, and the weight per unit area of fiber 101 is low.That is, in this nonwoven fabric 170, it is minimum that depressed part 3A is formed weight per unit area.
The weight per unit area of depressed part 3A for example can express 0 to 100g/m for example 2, good is 0 to 50g/m 2Here, the weight per unit area of depressed part 3A is 0g/m 2Represent that this depressed part 3A is the situation of opening.If the weight per unit area of depressed part 3A compares 100g/m 2The liquid that greatly, then drops into the regulation of slot part 1 is trapped in depressed part 3A for the time being.
Like this, for example under the situation that this nonwoven fabric 170 is used as the surface patch of absorbent commodity etc., exist if in the liquid holdup of regulation under the situation of depressed part 3A, produce action variation etc., then Gui Ding liquid easily overflows from depressed part 3A, in slot part 1 diffusion, and then, pollute the situation of skin in the surface diffusion into the surface of this nonwoven fabric 170.
The protuberance 4A of slot part 1 is formed with depressed part 3A and compares, the weight per unit area height of fiber 101.For example, the weight per unit area of protuberance 4A can express 5 to 200g/m for example 2, good is 10 to 100g/m 2Weight per unit area at this protuberance 4A compares 5g/m 2Under the little situation, be applied in superfluous external pressure, convex shaped part 2 is existed this protuberance 4A too by conquassation by under the such situation of conquassation, can not remain in the slot part 1 situation in the space that forms by depressed part 3A.
In addition, the weight per unit area at protuberance 4A compares 200g/m 2Under the big situation, at protuberance 4A, superfluous external pressure is applied to this nonwoven fabric 170 in the liquid holdup of the regulation that falls into slot part 1, and under situation that skin directly contacts, existence brings the situation of damp.
[2.6.2] manufacture method
Below, the method for making this nonwoven fabric 170 is described.At first, same with first embodiment, fiber web 100 is positioned in upper face side as the support component shown in Figure 180 270 of aeration support component.In other words, by support component 270, support fiber web 100 from downside.
Then, fiber web 100 is moved under the state that is supported by support component 270 in prescribed direction.Have again,, in view of the above, can make this nonwoven fabric 170 from the main fluid that constitutes by gas of upper face side injection of mobile fiber web 100.
Here, support component 270 for example is the metal wire 271 with the regulation rugosity arranged side by side with respect to almost parallel ground, other the metal wire 272 of regulation rugosity is wound as helical form alternately, so that the aeration net of the spiral fabrics that a plurality of metal wires 271 of bridge joint mode each other forms.
The metal wire 271 and the metal wire 272 of this support component 270 become stuffiness portion.In addition, the part by metal wire 271 and metal wire 272 encirclements of this support component 270 becomes the hole portion 273 as ventilating part.
Under the situation that is such support component 270,, can partly change venting quality by partly changing rugosity, the filament shape of the method that inweaves, silk.For example, can use metal wire 271, metal wire 272 as stainless flat shape silk, has been carried out the support component 270 that spiral is knitted as stainless circular wire.
In addition, also can be for example further a plurality of metal wires (for example 2) to be made up as the metal wire 271 of stuffiness portion and the part of metal wire 272, as metal wire 271 or metal wire 272, by between the metal wire that further is combined, producing the gap, the fluid ventilation that a part mainly is made of gas.
But, in this case can express venting quality with respect to hole portion 273 for example below 90% as the hole portion 273 of ventilating part and the venting quality that becomes the metal wire part of stuffiness portion, good is 0 to 50%, is more preferably 0 to 20%.Here, the 0%th, represent the situation that the main in fact fluid that is made of gas can not be ventilated.
In addition, the venting quality in zone that becomes hole portion 273 grades of ventilating part for example can express 10000 to 60000cc/cm for example 2Min, good is 20000 to 50000cc/cm 2Min.But,, for example dig through the dish of metal at aeration support component as other, form under the such situation of ventilating part, because mainly the opposing to this disc portion of the fluid that is made of gas disappears, so, there is the situation that becomes the above venting quality of above-mentioned numerical value.
Good is in support component, and the sliding height on surface is compared in the zone that becomes stuffiness portion with the zone that forms ventilating part.Because the sliding height, in the zone of the injected fluid that mainly constitutes by gas and the intersection region of stuffiness portion, because fiber 101 moves easily, so, can improve the mouldability of depressed part 3A and protuberance 4A.
If the fiber web 100 that supports to supported parts 270 sprays the fluid that mainly is made of gas, then the zone of this injected fluid that mainly is made of gas becomes slot part 1, and by forming this slot part 1, relatively Tu Chu part becomes convex shaped part 2.About the formation of slot part 1 and convex shaped part 2 as first embodiment is set forth.
In addition, in slot part 1, if partly spray the fluid that mainly is made of gas to the metal wire 271 of support component 270 and the intersection point of metal wire 272, then the fluid that should mainly be made of gas is partly rebounded by this intersection point.Therefore, the fiber 101 that is supported on this intersection point part is directed onto all around, forms depressed part 3A.
Then, the fluid by injection above the hole of support component 270 one 273 mainly is made of gas forms slot part 1, by form depressed part 3A in slot part 1, forms relatively outstanding protuberance 4A.
In depressed part 3A, by spraying the fluid that mainly is made of gas, the fiber 101 directed with slot part 1 almost parallel ground is directed onto convex shaped part 2 sides, in addition, is directed onto protuberance 4A side at the fiber 101 with the direction orientation of intersecting along the direction of slot part 1.Therefore, in depressed part 3A, weight per unit area forms lowly.
On the other hand, in protuberance 4A, be directed onto from depressed part 3A by fiber 101,3A compares with depressed part, and weight per unit area forms highly.
In addition, as other the method for making this nonwoven fabric 170, also can be at first as first embodiment, manufacturing has formed the nonwoven fabric of slot part 1 and convex shaped part 2, then, carries out embossing processing at slot part 1, in view of the above, form depressed part 3A and protuberance 4A, make this nonwoven fabric 170.Have in this case depressed part 3A and the relation situation opposite of fibre density of protuberance 4A, weight per unit area etc. with the relation described in the present embodiment.That is fibre density, the weight per unit area situation lower that, has protuberance 4A than fibre density, the weight per unit area of depressed part 3A.
Here, as other the method for making this nonwoven fabric 170, also can be in advance on fiber web 100, form such concavo-convex of convex shaped part 2, slot part 1, on its fiber web 100, further overlap other the fiber web that fiber has the free degree each other, on this basis, spray the fluid that mainly constitutes by gas.Like this, by the injected fluid that mainly constitutes, in the fiber web on upper strata, form convex shaped part and slot part by gas, in slot part, because weight per unit area is low, so, be formed on concavo-convex the exposing on the fiber web of lower floor, form the protuberance and the depressed part of present embodiment.Then, by heat-treating, make the fiber web of the fiber web on upper strata and lower floor integrated.
The nonwoven fabric 170 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 170 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
Embodiment
13.1] first embodiment
＜fiber constitutes 〉
Use heart sheath structure, average fineness 3.3dtex, the long 51mm of average fiber, the coating of low density polyethylene (LDPE) (110 ℃ of fusing points) and polyethylene terephthalate have the heart sheath of the fiber A of hydrophilic finish and high density polyethylene (HDPE) (135 ℃ of fusing points) and polyethylene terephthalate construct, and the difference of fiber A be with coating it is to refuse the mixed cotton of the fiber B of water finish.Use the mixing ratio of fiber A and fiber B to be 70:30, weight per unit area is adjusted to 40g/m 2Fiber assembly.
Because the sheath composition of fiber A and fiber B has fusing point poor, it is poor that fiber intersection point intensity has each other produced, and therefore, the flexibility of nonwoven fabric improves.Specifically, because if oven drying temperature is set in for example 120 ℃, then at fiber A intersection point each other and the intersection point of fiber A and fiber B, the low density polyethylene (LDPE) fusion, so fiber is thermal welding each other, have again, therefore fiber A intersection point intensity each other improve because the amount of the low density polyethylene (LDPE) of fusion is many.In addition, therefore fiber B does not have thermal welding each other because high density polyethylene (HDPE) does not have fusion.That is, the relation of intersection point intensity of this moment is that fiber A intersection point strength ratio fiber A and the intersection point intensity of fiber B each other is big, and in addition, the intersection point strength ratio fiber B intersection point intensity each other of fiber A and fiber B is big.
＜create conditions
With the diameter is 1.0mm, and spacing is the ejiction opening 913 that 6.0mm forms a plurality of Fig. 9.In addition, being shaped as of ejiction opening 913 is just round, and ejiction opening 913 is a drum.The width of ejection portion 910 is 500mm.With temperature is 105 ℃, and air quantity is 1200 ℃/minute a condition, sprays hot blast.
With the fibre structure shown in the front, be that the carding machine that 20m/ divides is opened fibre by speed, make fiber web, it is 450mm that fiber web is cut into width.Then, with speed 3m/ branch, fiber web is transported on the net to the aeration of 20 sieve apertures.In addition,, spray hot blast, on the other hand,, attract (air-breathing) from the below of aeration net with the uptake of lacking than the hot blast rate that sprays to fiber web according to based on the creating conditions of ejection portion 910 shown in the front and ejiction opening 913.Then, under the state that transports by the aeration net, be 125 ℃ according to temperature, the hot blast air quantity is to transport about 30 seconds in the baker set of 10Hz.
＜result 〉
Convex shaped part: weight per unit area is 51g/m 2, thickness is 3.4mm (thickness at top is 2.3mm), fibre density is 0.03g/cm 3, the width of each this convex shaped part is 4.6mm, spacing is 5.9mm.
Slot part: weight per unit area is 24g/m 2, thickness is 1.7mm, fibre density is 0.01g/cm 3, the width of each this slot part is 1.2mm, spacing is 5.8mm.
Interfibrous spatial area rate: the spatial area rate of measuring from the convex shaped part side is 69%, is 51% from the spatial area rate of the face mensuration of the face opposition side give prominence to convex shaped part.
Interfibrous each spatial area: the spatial area of each that the face of the side of giving prominence to from convex shaped part is measured is 8239 μ m 2, the spatial area of each that measure from the face of the face opposition side given prominence to convex shaped part is 1787 μ m 2
Shape: the inside of slot part becomes the inside of this nonwoven fabric, and the inside shape of convex shaped part is to rise in the direction identical with this convex shaped part, and the innermost mode that does not form this nonwoven fabric forms.In addition, the shape of convex shaped part is formed the general dome shape, and convex shaped part and slot part form continuously in the mode of extending along its length.In addition, convex shaped part and slot part are to form in the mutual mode repeatedly of width.Have again, the most surperficial with at protuberance, the fiber partly different mode of intersection point intensity each other forms, and the fibre density of the nonwoven fabric that forms among other the embodiment with fibre density and explanation is in the back compared minimum mode and is formed.
[3.2] second embodiment
＜fiber constitutes 〉
Fiber constitutes identical with first embodiment.
＜create conditions
It is online that the fiber web that fiber shown in the front is constituted is positioned in aeration, is being 125 ℃ according to temperature, and the hot blast air quantity is to transport about 30 seconds in the baker set of 10Hz.Just in baker, transporting back (after about 2 seconds), according to the design of ejection portion 910 shown in the front and ejiction opening 913, be 120 ℃ with temperature, air quantity is that 2200 ℃/minute condition is sprayed hot blast.
＜result 〉
Convex shaped part: weight per unit area is 34g/m 2, thickness is 2.8mm, fibre density is 0.04g/cm 3(thickness at top is 2.3mm), the width of each this convex shaped part is 4.0mm, spacing is 6.1mm.
Slot part: weight per unit area is 21g/m 2, thickness is 1.1mm, fibre density is 0.02g/cm 3, the width of each this slot part is 2.1mm, spacing is 6.1mm.
Interfibrous spatial area rate: the spatial area rate of measuring from the convex shaped part side is 62%, is 48% from the spatial area rate of the face mensuration of the face opposition side give prominence to convex shaped part.
Interfibrous each the value of spatial area: the spatial area of each that the face of the side of giving prominence to from convex shaped part is measured is 7239 μ m 2, the spatial area of each that measure from the face of the face opposition side given prominence to convex shaped part is 1221 μ m 2
Shape: formed convex shaped part and slot part.
[3.3] the 3rd embodiment
＜fiber constitutes 〉
Fiber constitutes identical with first embodiment.
＜create conditions
Use ejection portion 910 and the ejiction opening 913 shown in the front, with temperature is 105 ℃, and air quantity is that the condition that 1000l/ divides is sprayed hot blast, on the other hand, from the below of aeration net, with the hot blast rate that sprays about equally or many slightly modes attract (air-breathing).
＜result 〉
Convex shaped part: weight per unit area is 49g/m 2, thickness is 3.5mm, fibre density is 0.02g/cm 3, the width of each this convex shaped part is 4.7mm, spacing is 6.1mm.
Slot part: weight per unit area is 21g/m 2, thickness is 1.8mm, fibre density is 0.01g/cm 3, the width of each this slot part is 1.4mm, spacing is 6.1mm.
Interfibrous spatial area rate: the spatial area rate of measuring from the convex shaped part side is 69%, is 55% from the spatial area rate of the face mensuration of the face opposition side give prominence to convex shaped part.
Interfibrous each spatial area: the spatial area of each that the face of the side of giving prominence to from convex shaped part is measured is 14477 μ m 2, the spatial area of each that measure from the face of the face opposition side given prominence to convex shaped part is 1919 μ m 2
Shape: form convex shaped part and slot part, the inside shape of convex shaped part contacts with the below and is general planar.
[3.4] the 4th embodiment
＜fiber constitutes 〉
Fiber constitutes identical with first embodiment.
＜create conditions
With the design of ejection portion 910 shown in the front and ejiction opening 913, be 80 ℃ with temperature, air quantity is the condition that 1800l/ divides, jet airstream.Then, by to be the spacing of 5mm at length direction and to be the spacing of 5mm, be configured to jagged pin at width, with 200 times/minute, towards direction alongst, speed is the 3m/ branch, the fiber web that fiber shown in the front is constituted carries out acupuncture, makes fiber half interlacing each other.Then, create conditions jet airstream with ejection portion 910 shown in the front and ejiction opening 913.In addition, simultaneously with hot blast rate about equally or many slightly uptakes, attract (air-breathing) from the below of aeration net.
＜result 〉
Convex shaped part: weight per unit area is 45g/m 2, thickness is 2.3mm, fibre density is 0.02g/cm 3, the width of each this convex shaped part is 4.3mm, spacing is 5.8mm.
Slot part: weight per unit area is 17g/m 2, thickness is 0.8mm, fibre density is 0.02g/cm 3, the width of each this slot part is 1.0mm, spacing is 5.9mm.
Interfibrous spatial area rate: the spatial area rate of measuring from the convex shaped part side is 64%, is 47% from the spatial area rate of the face mensuration of the face opposition side give prominence to convex shaped part.
Interfibrous each spatial area: the spatial area of each that the face of the side of giving prominence to from convex shaped part is measured is 8199 μ m 2, the spatial area of each that measure from the face of the face opposition side given prominence to convex shaped part is 1576 μ m 2
Shape: convex shaped part and slot part form continuously in the mode of extending along its length.In addition, this convex shaped part and slot part are formed the interlacing point that has partly towards the below, at width mutually repeatedly.
Make use-case
As the purposes of nonwoven fabric of the present invention, for example, can express the surface patch of the absorbent commodity of sanitary napkin, liner, diaper etc. for example.In this case, though convex shaped part be skin face side, the inside side which all can,, because by being skin face side, can reduce the contact area with skin, so, the situation of the damp that is difficult to feel that body fluid causes is arranged.In addition, surface patch and the intermediate between the absorber that also can be used as absorbent commodity uses.Because reduce with the contact area of surface patch or absorber, so, there is the situation of returning of being difficult to from absorber.In addition, owing to reduce, have the buffering sense with the contact area of skin, so also can be used in the outermost, magic tape material etc. of the lateral plate, diaper etc. of absorbent commodity.In addition, can be used in many aspects such as the wiper that is used to remove attached to the rubbish on ground, the health, dirt etc., face shield, breast pad.
[4.1] surface patch of absorbent commodity
As the purposes of nonwoven fabric of the present invention, as Figure 19, shown in Figure 20, for example can express for example and will have convex shaped part and slot part, the situation that the relatively low nonwoven fabric of the fibre density of slot part uses as the surface patch 301,302 of absorbent commodity.In this case, good is to dispose this nonwoven fabric in the mode that the face that is formed with convex shaped part becomes the skin side.
Under with the situation of this nonwoven fabric as surface patch 301,302 uses of absorbent commodity, if drain the liquid of regulation, then this liquid mainly falls into slot part.In the nonwoven fabric of the present invention, the fibre density of slot part is low.That is, the number of fiber of each unit volume is few, and the key element that hinders liquid to see through is few, therefore, liquid is promptly shifted downwards.
Have again, even the fibre density of slot part is low, also since the major part of the fiber of slot part in the width orientation, so, can prevent TENSILE STRENGTH height, in the wearing of absorbent commodity to width, apply power, the situation of these surface patch 301,302 breakages to friction of width etc.
On the other hand, the fibre density height that convex shaped part is relative.This is because when forming slot part, because the main fluid that is made of gas, fiber moves, and owing to the fiber that should move, forms the sidepiece of convex shaped part.The sidepiece of convex shaped part is because fiber is intensive each other, so the rigidity height.Have again,, contain fiber in a large number, therefore,, also prevent conquassation easily even load is applied to convex shaped part in the thickness direction orientation at the central portion that is clipped by sidepiece at convex shaped part, though convex shaped part because of load by conquassation, the compression and back renaturation is also high.
In view of the above, even, impose on the load change of surface patch 301,302 because the body appearance changes, also the contact area with skin can be kept low, so, sense of touch can be kept, have again, even, also be difficult to be attached to again widely skin in a single day by the liquid withdrawal of absorbent body.
[4.2] intermediate of absorbent commodity
As the purposes of nonwoven fabric of the present invention, as shown in figure 21, for example can express for example and will have slot part and convex shaped part, the situation that the relative low nonwoven fabric of the fibre density of slot part uses as the intermediate 311 of absorbent commodity.In this case, good is to dispose this nonwoven fabric in the mode that the face that is formed with convex shaped part becomes surface patch 310 sides.
By become the mode of surface patch 310 sides with the face that is formed with convex shaped part, this nonwoven fabric is configured as intermediate 311, can between surface patch 310 and intermediate 311, a plurality of spaces be set.Therefore, also few even under the situation that a large amount of liquid was drained in the short time because hinder the key element that liquid sees through, spread widely at surface patch 310 so can prevent this liquid.
Have again, even in case,, also,, be attached to skin widely again so this liquid is difficult to get back to surface patch 310 because the contact rate of intermediate 311 and surface patch 310 is low by the liquid withdrawal of absorbent body through intermediate 311.
In addition, because the central portion of the convex shaped part of this intermediate 311 compares with sidepiece, slot part, contain manyly at the fiber of thickness direction orientation, the summit of convex shaped part contacts with surface patch 310, so the liquid that remains in surface patch 310 is drawn into thickness direction easily.In view of the above, liquid is difficult to remain in surface patch 310.
Like this, can access, can prevent that liquid is widely for a long time attached on the skin at the fixed point of surface patch 310 and the low-residual of liquid.Have again, because the sidepiece of convex shaped part is mainly formed by the fiber that is moved, so at the containing ratio height of the vertical directional fiber of orientated lengthwise.In view of the above, the liquid of for example menses etc. of transferring to the sidepiece of intermediate 311 from surface patch 310 can be induced to length direction.Therefore,, also can prevent to bring out leakage, can improve the absorption efficiency of absorber from absorbent commodity even liquid spreads to width.
[4.3] outermost of absorbent commodity
Purposes as nonwoven fabric of the present invention, as shown in figure 22, for example can express for example and will have slot part and convex shaped part, the situation that the relative low nonwoven fabric of the fibre density of slot part uses as the outside (outermost 321) of the absorbent commodity of for example diaper etc.In this case, good is to dispose this nonwoven fabric in the mode that the face that is formed with convex shaped part becomes the outside of this absorbent commodity.
Be configured because become the mode in the outside of absorbent commodity with the face that is formed with convex shaped part of this outermost 321, thus when using this absorbent commodity mainly with situation that hand contacts under, sense of touch is good.In addition, because the fibre density of slot part is low, so, the aeration excellence.
Each constitutes thing
Below, each is constituted thing be described in detail.
[5.1] relevant with nonwoven fabric
[5.1.1] fiber assembly
Fiber assembly is to be formed the roughly fiber assembly of sheet, is the fiber assembly that the fiber that constitutes this fiber assembly has the state of the free degree.In other words, be the fiber assembly that in this sheet, has the fiber free degree each other.Here, when the fiber free degree each other is meant the fluid jet that mainly is made of gas as the fiber web of fiber assembly, the degree that fiber can move freely.This fiber assembly for example can mix the blended fiber of a plurality of fibers by ejection, and the fibrage that forms specific thickness forms.In addition, for example, can by a plurality of different fibers of ejection each, lamination several times forms fibrage and forms.
As fiber assembly of the present invention, for example can express the fiber web that forms by the comb and parallel cotton fibers prior to spinning method for example, perhaps by thermal welding, the fiber web before fiber thermal welding is each other solidified.In addition, can express the net that forms by the air-flow method for example, perhaps by thermal welding, the fiber web before fiber thermal welding is each other solidified.In addition, can express for example by the embossed thermal welding curing fiber web in the past of spot gluing method.In addition, can express the embossed fiber assembly in the past that spins, the fiber assembly before perhaps embossed thermal welding is solidified for example by spun-bond process.In addition, can express the fiber web of half interlacing that forms by needle point method for example.In addition, can express the fiber web of half interlacing that forms by the water acupuncture manipulation for example.In addition, can express the fiber assembly before fiber thermal welding is each other solidified for example by the meltblown spinning.In addition, can express for example by the solvent welding method form because solvent, fiber solidifies former fiber assembly each other.
In addition, good is by air (gas) stream, and what fiber was arranged easily again is by using the formed fiber web of comb and parallel cotton fibers prior to spinning method of long fiber, having, can express fiber free degree height each other for example, only the thermal welding net in the past that forms by interlacing.In addition, in order to flow by a plurality of air (gas), behind the formation slot part (concavo-convex) etc., under the state that keeps its shape, make it nonwoven fabricization, good is handles (heat treated) by carrying out baker with predetermined heating device etc., makes the hot blast through transmission technique of the thermoplasticity fiber thermal welding that fiber assembly contains.
[5.1.2] fiber
As the fiber that constitutes fiber assembly (for example, constitute the fiber 101 of fiber web 100 shown in Figure 1), the thermoplastic resin that for example can list by low density polyethylene (LDPE), high density polyethylene (HDPE), straight chain shaped polyethylene, polypropylene, polyethylene terephthalate, modified polypropene, modification polyethylene terephthalate, nylon, polyamide etc. constitutes the fiber that each resin is independent or compound.
The complex of fiber can list the fusing point of the core composition for example core sheath formula higher than sheath composition, the core shift formula of core sheath, the different block form of fusing point of left and right sides composition.In addition, also can be with the abnormal shape of hollow type, flat, Y type, C type etc., potentially crispatura, show what the three-dimensional crinkled fibre of crispaturaing, the load of physics by current, heat, embossing etc. were cut apart and cut apart mixed with fibers in the complex of fiber.
In addition, in order to form the three-dimensional shape of crispaturaing, can cooperate showing of regulation at crinkled fibre, potential crinkled fibre.Here, the three-dimensional shape of crispaturaing is meant the shape of helical form meander-like Ω shape etc., though fiber alignment main body ground towards in-plane, fiber alignment is also partly towards thickness direction.In view of the above, because the buckling strength of fiber itself is to the thickness direction effect, so, even applied external pressure, highly also be difficult to damage by pressure.Have again, among them, if spiral helicine shape, then because when having discharged external pressure, shape is wanted to restore, so, even, after external pressure discharges, also return to original thickness easily because superfluous external pressure is damaged by pressure highly a little.
Showing at crinkled fibre is to crispatura by machinery to pay shape, and the core sheath is configured to the general name of the fiber of being crispaturaed in advance with core shift formula, block form etc.Potential crinkled fibre is by heating, manifests the fiber of crispaturaing.
It is the fiber of continuous linearity at after the spinning that machinery is crispaturaed, and can control processing by the peripheral speed differential thermal pressurization of linear velocity.The number of crispaturaing of each unit length is many more, can improve with respect to the buckling strength of depressing outward more.For example, that the number of crispaturaing is good is 10 to 35/inch, is more preferably the scope of 15 to 30/inch.
Pay shape by thermal contraction and be meant by the different plural resin of fusing point and constitute, because if heating, then because fusing point is poor, percent thermal shrinkage changes, so be the fiber that three-dimensional is crispaturaed.The resin of fibre section constitutes the core shift formula that can enumerate knockout sheath structure, the different block form of fusing point of left and right sides composition.The percent thermal shrinkage of such fiber for example can express 5 to 90% for example as good value, is more preferably 10 to 80% scope.
The assay method of percent thermal shrinkage is: the fiber that (1) makes mensuration is 100%, 200g/m 2Net, (2) make the sample of the size be cut into 250X250mm, (3) were placed on this sample in the baker of 145 ℃ (418.15K) 5 minutes, (4) measure the length dimension after shrinking, (5) can calculate from the length dimension difference before and after the thermal contraction.
Under the situation that this nonwoven fabric is used as surface patch, if consider the entering of liquid for example, skin sense of touch, then fiber number in 1.1 to 8.8dtex scope for well.
Under the situation that this nonwoven fabric is used as surface patch, as the fiber that constitutes fiber assembly, for example stay the such a spot of menses of skin, sweat etc., also can contain the liquid hydrophilic fibre of the cellulose family of slurry, chemical sizwe, artificial fibre, cellulose acetate, natural cotton etc. for absorption of residual.But, because cellulosic fibre is difficult to discharge once the liquid that absorbs, so, as good sample attitude, for example can express for example with respect to integral body, sneak into the situation of the scope of 0.1 to 5 quality %.
Under the situation that this nonwoven fabric is used as surface patch, for example consider entering, the back side rewetting of liquid, also can in the above-mentioned hydrophobic synthetic fibre of enumerating, integrate hydrophilizing agent, water repellent etc., perhaps carry out coating etc.In addition, also can pass through corona treatment, plasma treatment, pay hydrophily.In addition, also can contain the WATER REPELLENCY fiber.Here, the WATER REPELLENCY fiber is meant and has carried out the known fiber of refusing water treatment.
In addition,, also for example can contain the inorganic filler of titanium oxide, barium sulfate, calcium carbonate etc. in order to improve brightening property.Under the situation of composite fibre that is core sheath formula, can only be contained in the core, can also be contained in the sheath.
In addition, such as shown previously, by air flow, what fiber was arranged easily again is the fiber web that forms by the comb and parallel cotton fibers prior to spinning method of using long fiber.For by a plurality of air flows, behind the formation slot part (concavo-convexization) etc., under the state that keeps its shape, make it nonwoven fabricization, good is to handle (heat treated) by baker, makes the hot blast through transmission technique of thermoplasticity fiber thermal welding.As the fiber that is fit to this method for making, in order to make fiber intersection point thermal welding each other, good core sheath structure, the fiber of structure side by side of being to use, be more preferably by sheath each other easily the fiber of the core sheath of thermal welding effectively structure constitute.The particularly good core sheath composite fibre that is to use the core sheath composite fibre that constitutes by polyethylene terephthalate and polyethylene, constitutes by polypropylene and polyethylene.These fibers can use separately or with two or more the combination.In addition, it is 20 to 100mm that fiber is grown good, and good especially is 35 to 65mm.
[5.2] relevant with non-woven cloth manufacturing device
The fluid that [5.2.1] mainly is made of gas
The fluid that mainly is made of gas of the present invention for example can be expressed at normal temperature for example or be adjusted to the gas of set point of temperature or contain the atomic aerosol of solid or liquid in this gas.
As gas, for example can express air, nitrogen etc. for example.In addition, gas also comprises the steam of the liquid of steam etc.
Aerosol is the material that is dispersed with liquid or solid in gas, enumerates its example below.For example, can express and be dispersed with the softener that is used for painted China ink, is used to improve the silicon etc. of flexibility, be used to prevent the inorganic filler of the activating agent of the hydrophily of charged and control wettability or WATER REPELLENCY, the titanium oxide that is used to improve the energy of fluid, barium sulfate etc. for example, when being used to improve the energy of fluid, in heat treated, be used to improve the aerosol of the powder binder of the polyethylene of keeping concave-convex shaping etc., the antihistaminic that is used for antipruritic bagodryl hydrochloride, isopropyl methyl phenol etc., humectant, bactericide etc.Here, solid comprises gelatinous material.
Mainly the temperature of the fluid that is made of gas can be adjusted rightly.Can adjust rightly according to the shape of the character of the fiber that constitutes fiber assembly, nonwoven fabric that desire is made.
Here, for example for the fiber that constitutes fiber assembly is moved validly, be to a certain degree high temperature still with the temperature of the fluid that mainly constitutes by gas.In addition, in fiber assembly, contain under the situation of thermoplasticity fiber, the temperature that can soften for this thermoplasticity fiber by the temperature that makes mainly the fluid that constitutes by gas, can constitute the thermoplasticity fiber softening or the fusion in the zone that makes the fluid that is configured in injected mainly to constitute by gas etc., can make it to harden once again simultaneously.
In view of the above, for example, keep the shape of nonwoven fabric by spraying the fluid that mainly constitutes by gas.In addition, for example, when having been paid the mobile member that is prescribed at fiber assembly and having been moved, the intensity of the degree that this fiber assembly (nonwoven fabric) can not scatter.
Mainly the flow of the fluid that is made of gas can be adjusted rightly.The concrete example that has the fiber assembly of the free degree as fiber each other, for example, by sheath is high density polyethylene (HDPE), core is that polyethylene terephthalate constitutes, fiber length is 20 to 100mm, good is 35 to 65mm, and fiber number is 1.1 to 8.8dtex, and good is, and 2.2 to 5.6dtex core sheath fiber is a main body.Use the comb and parallel cotton fibers prior to spinning method to open fibre if can express for example, then fiber length is 20 to 100mm, and good is 35 to 65mm, if the air-flow method is opened fibre, then fiber length is 1 to 50mm, and good is 3 to 20mm fiber is according to 10 to 1000g/m 2, good is 15 to 100g/m 2The fiber web of adjusting 100.
As the condition of the fluid that mainly constitutes by gas, for example can express for example that (ejiction opening 913: diameter is 0.1 to 30mm, and good is 0.3 to 10mm in the ejection portion 910 that has formed Fig. 8 or a plurality of ejiction openings 913 shown in Figure 9; Spacing is 0.5 to 20mm, and good is 3 to 10mm; Be shaped as just circle, ellipse or rectangle) in, with air quantity is 3 to 50[L/ (branch hole)], good is 5 to 20[L/ (branch hole)] condition, to fiber web 100 injection temperations is 15 to 300 ℃ (288.15K is to 573.15K), and good is the situation of the hot blast of 100 to 200 ℃ (373.15K is to 473.15K).
For example, under the situation of having sprayed the fluid that mainly constitutes with above-mentioned condition, its position of the fiber of formation, towards the fiber assembly that can change one of suitable example of fiber assembly of the present invention by gas.By with such fiber, creating conditions makes, can moulding the nonwoven fabric shown in Fig. 2,3 for example.
The size of slot part 1, convex shaped part 2, weight per unit area can obtain in following scope.In slot part 1, thickness is 0.05 to 10mm, 0.1 to 5mm scope that good is, and width is 0.1 to 30mm, 0.5 to 5mm scope that good is, weight per unit area is 2 to 900g/m 2, good is 10 to 90g/m 2Scope.In convex shaped part 2, thickness is 0.1 to 15mm, 0.5 to 10mm scope that good is, and width is 0.5 to 30mm, 1.0 to 10mm scope that good is, weight per unit area is 5 to 1000g/m 2, good is 10 to 100g/m 2Scope.Though can make nonwoven fabric in above-mentioned number range roughly, be not limited to this scope.
[5.2.2] aeration support component
As aeration support component 200, can express a side that supports fiber web 100 for example and be general plane shape or curved surface shape roughly, simultaneously, the support component that general plane shape or roughly curved surface are general planar.As general plane shape or curved surface shape roughly, for example, can express tabular, cylindric for example.In addition, the general planar shape for example is meant that the face of the mounting fiber web 100 of support component itself does not form the situation of concavo-convex grade.Specifically, can express the net that is not formed concavo-convex grade for example as mesh-supported parts 210.
As this aeration support component 200, for example can express tabular support component, support component cylindraceous for example.Specifically, can express above-mentioned mesh-supported parts 210, support component 270 for example.
Here, aeration support component 200 can be configured on the non-woven cloth manufacturing device 90 removably.In view of the above, can dispose rightly and the corresponding aeration support component 200 of desirable nonwoven fabric.In other words, in non-woven cloth manufacturing device 90, aeration support component 200 can exchange with other the aeration support component of selecting from different a plurality of aeration support components.
To Fig. 4 (A) and the mesh-supported parts 210 (B), Figure 16 (A) and (B) shown in the mesh portion, the support component 270 of Figure 18 of support component 220 be described as follows.Mesh portion as this aeration, for example can express the silk of using based on the resin of polyester polyphenylene sulfide nylon conductive monofilaments etc. for example, perhaps based on the silk of the metal of stainless steel copper aluminium etc. etc., the aeration net that inweaves with flat fabric TWILL CLOTH SATIN AND SATEEN CLOTH two-layer fabric spiral fabrics etc.
Here, the venting quality of this aeration net for example can partly change venting quality by rugosity, the filament shape that partly changes the method that inweaves, silk.Specifically, can express for example aeration sieve aperture based on the spiral fabrics of polyester, based on aeration sieve aperture based on the spiral fabrics of the flat shape silk of stainless steel and circular wire.
As plate-like support member, for example can express the sleeve that the metal by stainless steel copper aluminium etc. makes for example.Sleeve can be expressed the pattern with regulation for example, partly digs through the sleeve of the plate of above-mentioned metal.The position that this metal is dug through is a ventilating part, and the part that metal is not dug through is a stuffiness portion.In addition, with above-mentioned same, in stuffiness portion, in order to improve the sliding on surface, good is this surface smoothing.
As sleeve, for example can express length for example is 3mm, width is the hole portion that the square metal of growing crosswise that makes each angle Cheng Yuan of 40mm is dug through, that the interval that online flow direction (moving direction) sky is opened 2mm, the arranged spaced of opening 3mm at the width sky become is cancellate, thickness is the sleeve of the stainless steel of 0.3mm.
In addition, can represent for example that the portion of portalling is configured to jagged sleeve.For example, be that the hole portion that the circular metal of 4mm is dug through is 12mm being configured to online flow direction (moving direction) spacing with diameter, be that jagged, the thickness of 6mm is the sleeve of the stainless steel of 0.3mm in the width spacing.Like this, can in time set pattern (the hole portion of formation), the configuration of digging through.
Have again, can express the mesh-supported parts 260 shown in Figure 12 of the fluctuating that is provided with regulation for example.For example, the position that can express not the fluid that mainly is made of gas by direct injection for example has the aeration support component of alternatively rise and fall (for example wavy) to the moving direction (moving direction) of linear flow.By using the mesh-supported parts 260 of shape like this, for example can access the peristome that is formed with regulation, simultaneously, be formed integrally nonwoven fabric for the shape of the alternatively fluctuating of mesh-supported parts 260 (for example wavy).
[5.2.3] injection member
The fluid that ejection portion 910 owing to can change mainly is made of gas towards, therefore, for example can adjust the interval of formed concavo-convex recess (slot part), the height of convex shaped part etc. rightly.In addition, for example since be can automatically change above-mentioned fluid towards formation, therefore, for example can be rightly slot part etc. be adjusted into snakelike shape (wavy, meander-like), other shape.In addition, by adjusting mainly spray volume, the ejection time of the fluid that constitutes by gas, can adjust rightly slot part, peristome shape, form pattern.Mainly the fluid that is made of gas can be vertical with respect to the spray angle of fiber web 100, in addition, also can in the moving direction F of fiber web 100, move direction only towards predetermined angular to linear flow as this moving direction F, perhaps to opposite, only towards predetermined angular with the moving direction of linear flow.
[5.2.4] heater
Though as the bonding method of the fiber 101 of the nonwoven fabric 170 that makes the peristome that has formed regulation, the heat bonding that bonding, the spot gluing method that for example can express for example that needle point method, water acupuncture manipulation, solvent welding method carry out, hot blast method are carried out, but for the shape of the peristome of keeping formed regulation, good is the hot blast method.So, for example heat treatment of the heater portion 950 hot blast method of carrying out that good is.
[5.2.5] other
The nonwoven fabric that produces by heater portion 950 heating, by with conveyer 930 at the continuous conveyer 940 of prescribed direction F, move to the operation, the coiling operation that for example nonwoven fabric are cut into the regulation shape.Conveyer 940 is same with conveyer 930, also can have belt portion 949 and rotating part 941 etc.
Good embodiment of the present invention is set forth and illustrated, but these examples of the present invention only, can not understand is to be limitation of the present invention, appends, omits, replaces or other correction does not break away from spirit of the present invention or scope.Therefore, invent only limited by the claimsly, should not be subjected to the restriction of the record of above-mentioned specification.

Claims (18)

1. a nonwoven fabric is the nonwoven fabric with first direction and second direction, it is characterized in that having:
A plurality of jeting areas of injected fluid and
The a plurality of non-jeting area that does not have injected above-mentioned fluid,
Above-mentioned nonwoven fabric sprays to fiber assembly by the fluid that will mainly be made of gas and forms,
Each fibre density of above-mentioned a plurality of jeting area is lower than each fibre density of above-mentioned a plurality of non-jeting areas;
Each weight per unit area of above-mentioned a plurality of jeting area is lower than each weight per unit area of above-mentioned a plurality of non-jeting areas;
The shape that above-mentioned fiber assembly is arranged with fiber is by heat bonding.
2. nonwoven fabric as claimed in claim 1 is characterized in that, the containing ratio of above-mentioned each its first direction directional fiber of a plurality of jeting areas is lower than the containing ratio of second direction directional fiber.
3. nonwoven fabric as claimed in claim 1 or 2, it is characterized in that, above-mentioned a plurality of non-jeting areas each its value of the spatial area rate of measuring from first side of the thickness direction of this nonwoven fabric than from as and the value height of the spatial area rate measured of second side of the face of above-mentioned first side opposition side.
4. nonwoven fabric as claimed in claim 3 is characterized in that, each is a plurality of slot parts in the thickness direction of above-mentioned first this nonwoven fabric of side direction depression for above-mentioned a plurality of jeting areas,
Each is with adjacent along each mode of above-mentioned a plurality of slot parts for above-mentioned a plurality of non-jeting area, at the outstanding a plurality of convex shaped parts of above-mentioned first above-mentioned thickness direction of side direction.
5. nonwoven fabric as claimed in claim 4 is characterized in that, each has the sidepiece that forms in the both sides of this convex shaped part above-mentioned a plurality of convex shaped parts,
Each fibre density of above-mentioned sidepiece is than each fibre density height of above-mentioned a plurality of slot parts.
6. nonwoven fabric as claimed in claim 5 is characterized in that, each fibre density of above-mentioned sidepiece than each the conduct of these a plurality of convex shaped parts by the fibre density height of the central portion in the folded zone of above-mentioned sidepiece.
7. nonwoven fabric as claimed in claim 4 is characterized in that, at above-mentioned a plurality of convex shaped parts in each, the difference of spatial area rate of measuring from above-mentioned first side and the spatial area rate measured from above-mentioned second side is more than 5%.
8. nonwoven fabric as claimed in claim 4 is characterized in that, each fibre density of above-mentioned a plurality of slot parts is at 0.18g/cm 3Below,
Each fibre density of above-mentioned a plurality of convex shaped part is at 0.20g/cm 3Below.
9. nonwoven fabric as claimed in claim 4 is characterized in that, each has above-mentioned a plurality of slot parts in the formed fibre density in the bottom of the above-mentioned slot part a plurality of sparse zone lower than the average fibre density of this bottom.
10. nonwoven fabric as claimed in claim 9 is characterized in that, above-mentioned a plurality of sparse zones are a plurality of peristomes.
11. nonwoven fabric as claimed in claim 10 is characterized in that, above-mentioned a plurality of peristomes each periphery fibre density than above-mentioned a plurality of slot parts by the fibre density height in the folded zone of above-mentioned a plurality of peristomes.
12., it is characterized in that each the fiber of periphery of above-mentioned a plurality of peristomes is with along each the mode orientation of periphery of above-mentioned a plurality of peristomes as claim 10 or 11 described nonwoven fabric.
13. nonwoven fabric as claimed in claim 4 is characterized in that, the convex shaped part of the regulation of above-mentioned a plurality of convex shaped parts is with different at the height of above-mentioned thickness direction across the adjacent convex shaped part of the slot part of the regulation of above-mentioned a plurality of slot parts.
14. nonwoven fabric as claimed in claim 4 is characterized in that, each top of above-mentioned a plurality of convex shaped parts is the general flat shape.
15. nonwoven fabric as claimed in claim 4 is characterized in that, in above-mentioned second side, form to the outstanding a plurality of zones of the projected direction opposition side of above-mentioned a plurality of convex shaped parts.
16. nonwoven fabric as claimed in claim 4 is characterized in that, in above-mentioned first direction undulation.
17. nonwoven fabric as claimed in claim 3 is characterized in that, above-mentioned second side of this nonwoven fabric is general plane.
18. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, the fiber that constitutes above-mentioned fiber assembly contains the fiber of WATER REPELLENCY.
CN2007800172186A 2006-06-23 2007-05-23 Nonwoven fabric Active CN101443501B (en)

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PCT/JP2007/060545 WO2007148499A1 (en) 2006-06-23 2007-05-23 Non-woven fabric

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CN2007800182563A Active CN101448991B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800182366A Active CN101448990B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800173348A Expired - Fee Related CN101443502B (en) 2006-06-23 2007-05-23 Nonwoven fabric
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CN2007800172082A Expired - Fee Related CN101443500B (en) 2006-06-23 2007-06-06 Multilayer nonwoven fabric and process for producing the same
CN2007800183424A Expired - Fee Related CN101448992B (en) 2006-06-23 2007-06-06 Absorbent, multilayered absorbent, and absorbent article
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CN101448990B (en) 2011-12-07
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