CN101448992B - Absorbent, multilayered absorbent, and absorbent article - Google Patents

Absorbent, multilayered absorbent, and absorbent article Download PDF

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Publication number
CN101448992B
CN101448992B CN2007800183424A CN200780018342A CN101448992B CN 101448992 B CN101448992 B CN 101448992B CN 2007800183424 A CN2007800183424 A CN 2007800183424A CN 200780018342 A CN200780018342 A CN 200780018342A CN 101448992 B CN101448992 B CN 101448992B
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fiber
absorber
weight per
per unit
unit area
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CN101448992A (en
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野田祐树
石川秀行
水谷聪
木村明宽
谷康一郎
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Unicharm Corp
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Unicharm Corp
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Abstract

The present invention provides an absorbent comprising water-absorbing fibers which has been regulated mainly with respect to fiber orientation and further with respect to basis weight concerning fiber amount and to shape. The absorbent (110) is an absorbent comprising water-absorbing fibers. It comprises: low-basis-weight regions which are formed continuously in a first direction and have a basis weight lower than the average basis weight of the absorbent (110); and high-basis-weight regions which are disposed on both sides of each low-basis-weight region when viewed in a second direction perpendicular to the first direction and which extend along the low-basis-weight regions and have a basis weight higher than the average basis weight. In each of the high-basis-weight regions, the content of longitudinally oriented fibers in the fibers (101) constituting the high-basis-weight region is higher than that of laterally oriented fibers therein. In each of the low-basis-weight regions, the content of laterally oriented fibers in the fibers (101) constituting the low-basis-weight region is higher than that of longitudinally oriented fibers therein.

Description

Absorber, multilayer absorber and absorbent commodity
Technical field
The present invention relates to the absorbent commodity that contains the absorber of hygroscopicity fibre and have this absorber.
Background technology
At present, the absorber that contains the hygroscopicity fibre of cellulosic fibre etc. is widely used for fields such as amenitiess such as paper nappy or physiological napkin, cleaning implement, medical supplies.Like this, though absorber is used for various field, under the situation about in fact in the product in each field, using, need manufacture character or structure with suitable each product purpose.
And, in recent years, sometimes will be on absorber lamination the multilayer absorber etc. of nonwoven fabric be processed into the shape that absorber is fit to each product purpose respectively, bring into play needed effect.
For example, open in the 2005-73921 communique, proposed following scheme (Japan) spy, that is, a kind of diaper of lengthwise, the urine of being drained for the diffusion of direction forwards, backwards etc. are processed to form slot part through embossing on absorber.
And, in No. 3556581 communique of (Japan) patent for example, following scheme has been proposed, that is, the absorber that paper pulp or super absorbent resin are formed is through penetrating nadel or conical papilla, having formed the absorber of the shrinkage pool of through hole or non-perforation.
But the absorber that (Japan) spy opens the formation embossing of 2005-73921 communique proposition becomes high density through the slot part that embossing is processed to form sometimes, and rigidity improves.Diaper with this absorber is installed under the situation on the health, can not coincide with body shape sometimes, produces the gap, like this, when the danger of leakage of exudates improves, has the problem that makes the user that foreign body sensation arranged.
And; The absorber that No. 3556581 communique of (Japan) patent proposes is owing to only be provided with through the absorber to even lamination and carry out the aperture portion that the secondary operations of nadel etc. forms, and the fiber in the zone beyond the aperture portion nearly all is towards identical direction.Like this; If the fiber in the zone beyond the aperture portion all is towards identical direction in any zone; Then the zone beyond aperture portion is moved the menses that come from top flat and is simultaneously avoided the direction almost concentric circles ground infiltration of aperture portion one side along the fiber alignment of hydrophilic fibre.Like this, if according to the absorber shape of the lengthwise of body shape, then menses flow to easily absorber both sides, have the problem that side leakage takes place.
Summary of the invention
The present invention provides the absorber with hygroscopicity fibre, mainly is the absorber of having adjusted fiber alignment and having adjusted fiber weight per unit area or shape.
(1) a kind of absorber contains hygroscopicity fibre,
Have a plurality of low fiber weight per unit area zones and a plurality of high fiber weight per unit areas zone,
Low fiber weight per unit area zone is along first direction forms continuously, the fiber weight per unit area is lower than this absorber average fiber weight per unit area;
High fiber weight per unit area zone with the second direction of above-mentioned first direction quadrature on be formed on the both sides in above-mentioned low fiber weight per unit area zone; Form along this low fiber weight per unit area zone; The fiber weight per unit area is higher than above-mentioned average fiber weight per unit area simultaneously
The containing ratio of the vertical directional fiber in the fiber in this high fiber weight per unit area zone of formation in above-mentioned a plurality of high fiber weight per unit areas zone is higher than the containing ratio of horizontal directional fiber,
The containing ratio of the above-mentioned horizontal directional fiber in the fiber in this low fiber weight per unit area zone of formation in above-mentioned a plurality of low fiber weight per unit areas zone is higher than the containing ratio of above-mentioned vertical directional fiber.
(2) like (1) described absorber, all or part of of above-mentioned a plurality of high fiber weight per unit areas zone is when the thickness direction of this absorber is outstanding, as the thickness convex shaped part thicker than the average thickness of this absorber of the length of above-mentioned thickness direction,
All or part of of above-mentioned a plurality of low fiber weight per unit areas zone is in the time of the shape of above-mentioned thickness direction depression, is the slot part of above-mentioned thin thickness.
(3), has at least a fiber small number of regions in a plurality of depressed parts, a plurality of peristome in above-mentioned low fiber weight per unit area zone formation like (1) or (2) described absorber.
(4) like (3) described absorber; As the regional above-mentioned thickness in side of the regional both sides zone, that be arranged on above-mentioned depressed part or above-mentioned peristome, side of above-mentioned high fiber weight per unit area, the above-mentioned thin thickness in the zone more regional than the non-above-mentioned side in the above-mentioned high fiber weight per unit area zone.
(5) like each described absorber in (1) to (4), also has the macromolecule absorber.
(6) like (5) described absorber, above-mentioned macromolecule absorber biasing is arranged on the opposing face side of the face that is formed with above-mentioned low fiber weight per unit area zone and above-mentioned high fiber weight per unit area zone.
(7) like (5) or (6) described absorber, above-mentioned macromolecule absorber is arranged on above-mentioned low fiber weight per unit area zone.
(8) a kind of absorber; Lamination is provided with second absorber as each described absorber in first absorber of each described absorber in (1) to (7) and the conduct (5) to (7), makes the face in mutual formation above-mentioned low fiber weight per unit area zone and above-mentioned high fiber weight per unit area zone relative.
(9) a kind of multilayer absorber has the absorber that first fibrage and lamination are arranged on the above-mentioned first fibrolaminar one side side and have hygroscopicity fibre,
Form a plurality of slot parts and a plurality of convex shaped part, a plurality of slot parts see from the above-mentioned first fibrolaminar another side, are on the shape ground of the thickness direction depression of this multilayer absorber to form along first direction; A plurality of convex shaped parts with to the outstanding shape of above-mentioned thickness direction from seeing that with the second direction of above-mentioned first direction quadrature when abutting to form with above-mentioned a plurality of slot parts, its fiber weight per unit area is higher than the zone of the bottom that constitutes above-mentioned slot part,
See from above-mentioned thickness direction, constitute above-mentioned a plurality of slot parts the bottom the zone and above-mentioned a plurality of convex shaped part respectively lamination above-mentioned first fibrage and above-mentioned absorber are set,
The shape that constitutes the above-mentioned absorber of above-mentioned a plurality of convex shaped parts is, the face of the above-mentioned first fibrage side on this absorber towards with above-mentioned first fibrage on above-mentioned another side to give prominence to the same side of a side outstanding.
(10) like (9) described multilayer absorber, the containing ratio of the vertical directional fiber of the fiber of this convex shaped part of formation of above-mentioned a plurality of convex shaped parts is higher than the containing ratio of horizontal directional fiber,
The containing ratio of the above-mentioned horizontal directional fiber of the fiber of these a plurality of slot parts of formation of above-mentioned a plurality of slot parts is higher than the containing ratio of above-mentioned vertical directional fiber.
(11) like (9) or (10) described multilayer absorber, see from the direction of this slot part elongation in the zone of the bottom that constitutes above-mentioned a plurality of slot parts, with the interval of regulation form a plurality of depressed parts with and/or a plurality of peristome,
The depressed part of above-mentioned a plurality of slot parts with and/or the depressed part of these a plurality of slot parts of formation of a plurality of peristomes with and/or a plurality of peristome on all or part of of side wall portion of periphery be configured the above-mentioned first fibrolaminar fiber-covered.
(12), also has second fibrage on the face of the above-mentioned first fibrage opposition side that is arranged on above-mentioned absorber like each described multilayer absorber in (9) to (11).
(13) like (12) described multilayer absorber, above-mentioned first fibrage and above-mentioned second fibrage form through the combing method lamination,
Above-mentioned absorber forms the fiber lamination that constitutes this absorber through utilizing the air lay method on the face of above-mentioned first fibrolaminar side's side.
(14) a kind of absorbent commodity has first fibrage, lamination is arranged on the liquid non-permeable film that the above-mentioned first fibrolaminar one side side has the absorber of hygroscopicity fibre and is arranged on the above-mentioned first fibrage phase counter-example of above-mentioned absorber,
Form a plurality of slot parts and a plurality of convex shaped part, slot part sees from the above-mentioned first fibrolaminar another side, and the shape that is in the thickness direction depression of this multilayer absorber forms along first direction; Convex shaped part is with to the outstanding shape of above-mentioned thickness direction, from seeing that with the second direction of above-mentioned first direction quadrature when abutting to form with above-mentioned a plurality of slot parts, its fiber weight per unit area is higher than the zone of the bottom that constitutes above-mentioned slot part,
Above-mentioned a plurality of slot part and above-mentioned a plurality of convex shaped part are formed by above-mentioned first fibrage and above-mentioned absorber,
The shape that constitutes the above-mentioned absorber of above-mentioned a plurality of convex shaped parts is, the above-mentioned first fibrage side on this absorber towards with above-mentioned first fibrage on above-mentioned the opposing party to give prominence to the same side of a side outstanding.
(15) like (14) described absorbent commodity, the containing ratio of the vertical directional fiber of the fiber of this convex shaped part of formation of above-mentioned a plurality of convex shaped parts is higher than the containing ratio of horizontal directional fiber,
The containing ratio of the above-mentioned horizontal directional fiber of the fiber of these a plurality of slot parts of formation of above-mentioned a plurality of slot parts is higher than the containing ratio of above-mentioned vertical directional fiber.
(16) like (14) or (15) described absorbent commodity, above-mentioned a plurality of slot parts with the regulation the interval form a plurality of depressed parts with and/or a plurality of peristome,
Above-mentioned a plurality of depressed part with and/or these a plurality of depressed parts of formation of a plurality of peristomes with and/or a plurality of peristome on all or part of of side wall portion of periphery be configured the above-mentioned first fibrolaminar fiber-covered.
(17) like each described absorbent commodity in (14) to (16), also has second fibrage that is arranged between above-mentioned absorber and the aforesaid liquid non-permeable film.
(18) a kind of manufacturing approach of absorber has: supporting operation, mobile process and jeting process,
The supporting operation is that the absorber that the fiber assembly through will containing the hygroscopicity fibre that forms sheet, the fiber that constitutes this fiber assembly have a state of the free degree is placed on the predetermined surface of gas permeability support unit with fiber assembly; The fiber lamination that perhaps will contain hygroscopicity fibre is arranged on the afore mentioned rules face, from above-mentioned absorber with a side bearing of fiber assembly on above-mentioned gas permeability support unit;
Mobile process is to make by the above-mentioned absorber of above-mentioned gas permeability support unit supporting through the travel mechanism that stipulates to move to first direction with fiber assembly;
Jeting process is to spray the fluid that mainly by gas formed to the above-mentioned absorber that above-mentioned first direction moves with the another side side of fiber assembly from quilt above-mentioned mobile process through the injection equipment of stipulating.
(19) a kind of manufacturing approach of multilayer absorber has: supporting operation, mobile process and jeting process,
The supporting operation is to be placed on the predetermined surface of gas permeability support unit with the multi-layer fiber aggregate of fiber assembly through having first fiber assembly and absorber; First fiber assembly is the fiber assembly that forms sheet, is to constitute the state that the fiber of this fiber assembly has the free degree; Absorber is the lamination one side side that is arranged on above-mentioned first fiber assembly, the fiber assembly that contains hygroscopicity fibre that forms sheet with fiber assembly; Be to constitute the state that the fiber of this fiber assembly has the free degree; The fiber lamination that perhaps will contain hygroscopicity fibre on the afore mentioned rules face, form this absorber with fiber assembly in, lamination is provided with above-mentioned first fibrage, forms above-mentioned multi-layer fiber aggregate, from a side bearing of above-mentioned multi-layer fiber aggregate on above-mentioned gas permeability support unit;
Mobile process is to make by the above-mentioned multi-layer fiber aggregate of above-mentioned gas permeability support unit supporting through the travel mechanism that stipulates to move to first direction;
Jeting process is the fluid of injection equipment from above-mentioned mobile process, mainly being formed by gas by the injection of the another side side of the above-mentioned multi-layer fiber aggregate that moves to above-mentioned first direction through regulation.
(20) a kind of manufacturing approach of multilayer absorber has: supporting operation, mobile process and jeting process,
The supporting operation be through will have first fiber assembly, absorber is placed on the predetermined surface of gas permeability support unit with the multi-layer fiber aggregate of the fiber assembly and second fiber assembly; First fiber assembly is the fiber assembly that forms sheet; Be to constitute the state that the fiber of this fiber assembly has the free degree; Absorber is the lamination one side side that is arranged on above-mentioned first fiber assembly, the fiber assembly that contains hygroscopicity fibre that forms sheet with fiber assembly; Be to constitute the state that the fiber of this fiber assembly has the free degree; Second fiber assembly be arranged on above-mentioned absorber with the above-mentioned first fibrolaminar opposition side of fiber assembly, form sheet roughly fiber assembly, be to constitute the state that the fiber of this fiber assembly has the free degree, from a side bearing of above-mentioned multi-layer fiber aggregate on above-mentioned gas permeability support unit;
Mobile process is to make by the above-mentioned multi-layer fiber aggregate of above-mentioned gas permeability support unit supporting through the travel mechanism that stipulates to move to first direction;
Jeting process is the fluid of injection equipment from above-mentioned mobile process, mainly being formed by gas by the injection of the another side side of the above-mentioned multi-layer fiber aggregate that moves to above-mentioned first direction through regulation.
(21) like the manufacturing approach of (20) described multilayer absorber, above-mentioned supporting operation comprises following operation:
Above-mentioned second fiber assembly is arranged on the afore mentioned rules face of above-mentioned gas permeability support unit,
Through will constitute above-mentioned absorber with the fiber lamination that contains above-mentioned hygroscopicity fibre of fiber assembly on the face of the opposition side of the above-mentioned gas permeability support unit side of above-mentioned second fiber assembly, form above-mentioned absorber and use fiber assembly,
The above-mentioned first fiber assembly lamination is arranged on the opposition side of the above-mentioned absorber of above-mentioned formation with the above-mentioned second fiber collection side on the fiber assembly, forms above-mentioned multi-layer fiber aggregate.
(22) like the manufacturing approach of (21) described multilayer absorber, above-mentioned absorber forms through the air lay method with fiber assembly.
The present invention can provide the absorber with hygroscopicity fibre, mainly is to have adjusted the orientation of fiber and adjusted the weight per unit area of fiber or the absorber of shape.
Description of drawings
Fig. 1 is fibroreticulate stereogram.
Fig. 2 is the three-dimensional cutaway view of the absorber of first embodiment.
Fig. 3 A is the vertical view of the absorber of first embodiment.
Fig. 3 B is the upward view of the absorber of first embodiment.
Fig. 4 A is the vertical view of netted support unit.
Fig. 4 B is the stereogram of netted support unit.
Fig. 5 is the fiber web of presentation graphs 1 figure of the state of the absorber of first embodiment of side jet gas, shop drawings 2 upward under the state of side below the supporting of the netted support unit of Fig. 4 A and Fig. 4 B.
Fig. 6 is the side view of explanation absorber manufacturing installation.
Fig. 7 is the vertical view of explanation absorber manufacturing installation.
Fig. 8 is the amplification stereogram of the regional Z among Fig. 6.
Fig. 9 is the upward view of the ejection portion of Fig. 6.
Figure 10 is the three-dimensional cutaway view of the absorber of second embodiment.
Figure 11 is the vertical view of the absorber of second embodiment.
Figure 12 A is the A-A ' cutaway view of Figure 11.
Figure 12 B is the B-B ' cutaway view of Figure 11.
Figure 13 A is the vertical view of the absorber of second embodiment.
Figure 13 B is the upward view of the absorber of second embodiment.
Figure 14 A is the vertical view that the elongate parts equally spaced is arranged side by side the support unit on netted support unit.
Figure 14 B is the stereogram that the elongate parts equally spaced is arranged side by side the support unit on netted support unit.
Figure 15 is the fiber web of presentation graphs 1 figure of the state of the absorber of second embodiment of side jet gas, manufacturing Figure 10 upward under the state of side below the support unit of Figure 14 A, Figure 14 B supporting.
Figure 16 is the three-dimensional cutaway view of the multilayer absorber of the 3rd embodiment.
Figure 17 is the three-dimensional cutaway view of the multilayer absorber of the 4th embodiment.
Figure 18 is near the structure key diagram of peristome of the multilayer absorber of the 4th embodiment.
Figure 19 is the three-dimensional cutaway view of the multilayer absorber of the 5th embodiment.
Figure 20 is the three-dimensional cutaway view of the absorber of the 6th embodiment.
Figure 21 is the three-dimensional cutaway view of the absorber of the 7th embodiment.
Figure 22 is the three-dimensional cutaway view of the absorber of the 8th embodiment.
Figure 23 is the three-dimensional cutaway view of absorbent commodity of the present invention.
Figure 24 A is a vertical view of offering the tabular support unit of a plurality of oval-shaped peristomes.
Figure 24 B is a stereogram of offering the tabular support unit of a plurality of oval-shaped peristomes.
The specific embodiment
Below, describe with regard to preferred forms of the present invention with reference to accompanying drawing.
Fig. 1 is fibroreticulate stereogram.Fig. 2 is the three-dimensional cutaway view of the absorber of first embodiment.Fig. 3 A is the vertical view of the absorber of first embodiment.Fig. 3 B is the upward view of the absorber of first embodiment.Fig. 4 A is the vertical view of netted support unit.Fig. 4 B is the stereogram of netted support unit.Fig. 5 be the fiber web of Fig. 1 under the state of side below the supporting of the netted support unit of Fig. 4 A and Fig. 4 B, side jet gas upward, the state diagram of the absorber of first embodiment of shop drawings 2.Fig. 6 is the side view of explanation absorber manufacturing installation.Fig. 7 is the vertical view of explanation absorber manufacturing installation.Fig. 8 is the amplification stereogram of the regional Z among Fig. 6.Fig. 9 is the upward view of the ejection portion of Fig. 6.Figure 10 is the three-dimensional cutaway view of the absorber of second embodiment.Figure 11 is the vertical view of the absorber of second embodiment.Figure 12 A is the A-A ' cutaway view of Figure 11.Figure 12 B is the B-B ' cutaway view of Figure 11.Figure 13 A is the vertical view of the absorber of second embodiment.Figure 13 B is the upward view of the absorber of second embodiment.Figure 14 A is the vertical view that the elongate parts equally spaced is arranged side by side the support unit on netted support unit.Figure 14 B is the stereogram that the elongate parts equally spaced is arranged side by side the support unit on netted support unit.Figure 15 be the fiber web of Fig. 1 under the state of side below the support unit of Figure 14 A, Figure 14 B supporting, side jet gas upward, the state diagram of the absorber of second embodiment of manufacturing Figure 10.Figure 16 is the three-dimensional cutaway view of the multilayer absorber of the 3rd embodiment.Figure 17 is the three-dimensional cutaway view of the multilayer absorber of the 4th embodiment.Figure 18 is near the structure key diagram of peristome of the multilayer absorber of the 4th embodiment.Figure 19 is the three-dimensional cutaway view of the multilayer absorber of the 5th embodiment.Figure 20 is the three-dimensional cutaway view of the absorber of the 6th embodiment.Figure 21 is the three-dimensional cutaway view of the absorber of the 7th embodiment.Figure 22 is the three-dimensional cutaway view of the absorber of the 8th embodiment.Figure 23 is the three-dimensional cutaway view of absorbent commodity of the present invention.Figure 24 A is a vertical view of offering the tabular support unit of a plurality of oval-shaped peristomes.Figure 24 B is a stereogram of offering the tabular support unit of a plurality of oval-shaped peristomes.
1. absorber
According to Fig. 1 to Figure 22, describe with regard to the embodiment of absorber of the present invention.
1-1. first embodiment
According to Fig. 1 to Fig. 9, describe with regard to the absorber of first embodiment.
1-1-1. absorber
Shown in Fig. 2, Fig. 3 (A) and Fig. 3 (B); The absorber 110 of this embodiment is the absorber that contains hygroscopicity fibre; Be that a plurality of slot parts 1 are when being formed on the one side side of this absorber 110 along mechanical flow direction (MD, first direction), from seeing the absorber that roughly equally spaced forms side by side with the direction (CD, second direction) of mechanical flow direction quadrature.And, between a plurality of slot parts 1 that roughly equally spaced form, form a plurality of convex shaped parts 2 respectively.This convex shaped part 2 is the same with slot part 1, sees roughly from CD equally spaced to form side by side.At this, in this embodiment,, be not limited to this though slot part 1 is roughly equally spaced to form side by side, for example can form by different interval, and, not side by side but see that from MD the interval between the slot part 1 forms with changing.
And the height (thickness direction) of the convex shaped part 2 of the absorber 110 of this embodiment is roughly the same, but also can make adjacent convex shaped part 2 form different height.For example, the height of convex shaped part 2 can be adjusted in the interval of the ejiction opening 913 of the fluid that is mainly formed by gas through the injection on the manufacturing installation 90 stated after the adjustment.For example, narrow down, can reduce the height of convex shaped part 2, on the contrary, widen the interval of ejiction opening 913, can improve the height of convex shaped part 2 through the interval that makes ejiction opening 913.And, also can alternately form the interval of ejiction opening 913 through making narrow interval and wide interval, alternately form highly different convex shaped parts 2.Like this, under the situation that the multi-layer nonwoven fabrics that alternately forms highly different convex shaped parts 2 and Body contact are provided with, and compare under the situation about highly equating,, so have the advantage that can reduce the burden of skin with the contact area minimizing of skin.
In this embodiment, convex shaped part 2 is high fiber weight per unit area zones, and the zone that constitutes the bottom of slot part 1 is low fiber weight per unit area zone.That is, the absorber 110 of this embodiment has a plurality of low fiber weight per unit area zone and a plurality of high fiber weight per unit area zones that are higher than the average fiber weight per unit area in the both sides in low fiber weight per unit area zone along the regional fiber weight per unit area that forms of this low fiber weight per unit area of seeing from MD that are lower than the average fiber weight per unit area on this absorber along the continuous fiber weight per unit areas that form of mechanical flow direction (MD) respectively.A plurality of high fiber weight per unit areas zone is in the fiber that constitutes high fiber weight per unit area zone, and MD is higher than the containing ratio of the horizontal directional fiber of non-vertical directional fiber to the containing ratio of the vertical directional fiber of the fiber of the scope interior orientation of+45 degree at-45 degree relatively.And a plurality of low fiber weight per unit areas zone is in the fiber that constitutes low fiber weight per unit area zone, and the containing ratio of horizontal directional fiber is higher than the containing ratio of vertical directional fiber.
The digital microscope VHX-100 that utilizes KEYENCE Co., Ltd. to make measures fiber alignment, utilizes following measuring method to carry out.(1) test portion is fixed on the observation platform; Make length direction (LD) for vertically, (2) dispose brokenly in face of outstanding fiber, with lens in focus near in face of fiber; (3) set the photography degree of depth (depth), on the PC picture, make the 3D rendering of test portion.(4) convert 3D rendering to the 2D image then, and (5) are drawn many at the parallel lines of measurement category with the in good time five equilibrium of length direction on picture.(6) at the parallel lines that draw, carried out on each unit of detailed division, observing fiber alignment is length direction or width, measures fiber number directed on all directions.Then, (7) through calculate all fibres quantity in the relative setting range, fiber alignment towards the ratio of the fiber number of length direction and fiber alignment towards the ratio of the fiber number of width, can measure, calculate.
At this; Be used at absorber 110 under the situation of absorbent commodity of sanitary napkin etc. this embodiment; For example; Formation is as the fiber 101 of the convex shaped part 2 in high fiber weight per unit area zone because to the direction of continuous formation convex shaped part 2 (MD, vertically, first direction) orientation, therefore, moves the liquid such as menses that come from top flat and shifts along the prolonging direction of convex shaped part 2.And; With few because of the formation fiber number of per unit area as the zone of regional convex shaped part 2 bottoms adjacent, that constitute the regional slot parts 1 of the low fiber weight per unit area of conduct of high fiber weight per unit area; Capillary force reduces; Therefore, the width (CD) of liquid such as the menses direction that is not easy to report to the leadship after accomplishing a task to the conduct and the prolonging direction of convex shaped part 2 infiltrates.
And,, therefore, carry out bending with slot part 1 as crooked starting point easily owing on absorber 110, form slot part 1 as low fiber weight per unit area zone.Therefore, the shape of the easy corresponding health of absorbent commodity is out of shape, and easier and health coincide.And; Even constitute the low fiber weight per unit area in zone of the bottom of slot part 1; Because the fiber of the bottom of this slot part 1 of formation is directed towards the width on this slot part 1, therefore, the intensity of the width on this absorber 110 (width on the slot part 1, CD) is high.Through like this, in the time of can suppressing to be worn over absorbent commodity on the health, change fold or the breakage that produces because of action.
And absorber contacts with the convex shaped part 2 that mainly is high fiber weight per unit area zone with the top flat of the skin surface that is arranged on this absorber 110.In other words because top flat in fact contact with bottom as the slot part 1 in low fiber weight per unit area zone, therefore, can suppress menses because of external pressure etc. from absorber refluence (getting damp).
1-1-2. manufacturing approach
According to Fig. 1, Fig. 6 to Fig. 9, describe with regard to the manufacturing approach of absorber 110.At first, the fiber web that contains hygroscopicity fibre 100 shown in Figure 1 is placed on the upper face side as the netted support unit 210 shown in Figure 4 of gas permeability support unit.In other words, utilize netted support unit 210 from following side bearing fiber web 100.The method that fiber web 110 is placed on the netted support unit 210 is placed on the upper face side of netted support unit 210 except the fiber web 100 that will form sheet, and the fiber that for example will contain hygroscopicity fibre in addition is through the method for air lay method lamination on netted support unit 210.
Then, make the state netted support unit 210 down of this fiber web 100 of supporting mobile,, can make the absorber 110 of this embodiment through the upper face side continuous injection gas of the fiber web 100 that moves from this to mechanical flow direction (MD).
As shown in Figure 4, netted support unit 210 is to form through inweaving many wires 211 as the regulation thickness of non-ventilative portion.Through inweaving many wire 211, can obtain forming the netted support unit 210 of the hole portion 213 of the ventilative portion of a plurality of conducts with having predetermined distance.
As stated, netted support unit 210 forms the hole portion 213 of a plurality of small-bores, and the gas that sprays from fibroreticulate upper face side, seeing through obstruction ground that this fibroreticulate gas do not receive this netted support unit 210, (opposition side of fiber web one side to be set) downwards ventilative.This netted support unit 210 does not make the gas flow of being sprayed that big change is arranged, and, fiber 101 is not moved to the lower direction of this netted support unit 210.
Therefore, the fiber on the fiber web 100 101 mainly moves to the direction of regulation through the gas that sprays from upper face side.Specifically be that therefore, fiber 101 moves to the direction along the surface of this netted support unit 210 because the restriction fiber moves to the lower side of netted support unit 210.
For example, the fiber 101 in zone that has been sprayed gas is to moving with the zone of this zone adjacency.And, to move having been sprayed under the state of gas through fiber web 100 to mechanical flow direction (MD), the zone after fiber 101 moves forms along the mechanical flow direction.Change in other words, fiber 101 moves to the side in the zone of having sprayed gas.
Like this, mainly move to the side, form slot part 1 to the directed fiber of mechanical flow direction (MD) 101.And, be left to the fiber 101 directed with the direction (CD) of mechanical flow direction (MD) quadrature in the bottom of slot part 1.And,, in other words be between slot part 1 and the slot part 1 that is adjacent, to form convex shaped part 2 in the side of slot part 1.Move and the fibre density raising of the side portion of the convex shaped part 2 that forms the time from the zone that formed slot part 1 to the directed fiber 101 of MD direction, in fiber 101,102 to the ratio raising of the fiber 101 of orientated lengthwise.
At this, fiber web 100 can only be made up of hygroscopicity fibre, and, also can mix hygroscopicity fibre and hot melt property fiber ground and form.Specifically can use the paper pulp and the polyethylene of 20～0 quality % and the fiber that polyacrylic core sheath structure forms that mix 80～100 quality %, the fiber weight per unit area is adjusted to 10 to 1000g/m 2The average fiber length that constitutes the fiber of fiber web 100 is 1～20mm, is preferably 2～10mm.
This hygroscopicity fibre is meant to have absorptive fiber and paid absorptive fiber.And, for example can be cellulosic fibre as having absorbefacient fiber.In addition, for example be through synthetic fiber or high shrinkage after the hydrophilic treated as having paid absorptive fiber.Particular content is of the back.
And; Because through the fluid that mainly forms to predetermined surface injection by gas by the short fibroplastic fiber web 100 of fibre length; Form a plurality of slot parts 1 and a plurality of convex shaped parts 2, therefore, preferably the opposition side of the fiber web 100 from the netted support unit 210 attracts (air-breathing).For example, can be about to before the predetermined surface of fiber web 100 is sprayed the fluid that is mainly formed by gas, to begin to attract (air-breathing).
Like this, attract (air-breathing), can make fiber web 100 and netted support unit 210 fluid-tight engagement, suppress to disperse because of injection mainly contains the fiber that fluid that gas forms causes through opposition side from netted support unit 210.Through like this, on the predetermined surface of fiber web 100, suitably form the shape of a plurality of slot parts 1 and a plurality of convex shaped parts 2.
1-1-3. absorber manufacturing installation
The absorber manufacturing installation 90 of according to Fig. 6 to Fig. 9, just making absorber 110 describes.
Absorber manufacturing installation 90 have from a side bearing as the gas permeability support unit of the fiber web 100 of fiber assembly, constitute another side side direction from this fiber web 100 sprayed mainly from the fiber web 100 of an above-mentioned side bearing by the gas permeability support unit fluid that forms by gas injection equipment ejection portion 910 and do not have illustrated air feed part and conduct makes the conveyer 930 of fiber web 100 to the travel mechanism that the prescribed direction F as the mechanical flow direction moves.
And; Make by the gas permeability support unit as the conveyer 930 of above-mentioned travel mechanism and to move to prescribed direction F, as the ejection portion 910 of injection equipment and do not have illustrated air feed part and spray the fluid that mainly forms by gas to being transferred the another side side of machine 930 on the fiber web 100 that prescribed direction F moves from the fiber web 100 under the state of an above-mentioned side bearing.
Like this; Utilize the fiber 101 that constitutes fiber web 100 through (injection) that spray from the ejection portion 910 main fluid that forms by gas; With and/or as the fluid that mainly forms by gas from (injection) of 910 ejections of this ejection portion, when seeing through fiber web 100 by after the non-ventilative portion on the gas permeability support unit of being formed on that states changed the fluid that mainly forms of flow direction by gas, the fiber 101 of formation fiber web 100 is moved.Through adjusting the amount of movement of this fiber 101, can adjust fiber alignment, fiber density or fiber weight per unit area on the fiber web 100, can form regulation slot part 1 (and convex shaped part 2) or after the peristome 3 stated.
At this, through changing mainly the injection conditions of the fluid that forms by gas, can adjust the mobile of the fiber 101 that constitutes fiber web 100.Promptly; Shape and setting except ventilative portion on the gas permeability support unit and the ventilative portion of absorber; Through adjusting mainly the injection conditions of the fluid that forms by gas, can adjust fiber alignment, fiber density or the fiber weight per unit area of absorber 110, the slot part 1 of regulation (reaching convex shaped part 2) or after the shape etc. of the peristome 3 stated.
1-2. second embodiment
According to Figure 11 to Figure 15, describe with regard to the absorber of second embodiment.The absorber 120 of second embodiment is the absorber that forms a plurality of peristomes 3 in the bottom of the slot part 1 in the low fiber weight per unit area zone of the absorber 110 of first embodiment with the interval of regulation.In this embodiment, see that from CD slot part 1 to be roughly uniformly-spaced forming abreast, but be not limited to this, for example can be to form by different interval, and, also can not arranged side by side but see that from MD the space of slot part 1 forms with changing.And the height of convex shaped part 2 also can be different, can form different height each other.And, in this embodiment,, can form a plurality of depressed parts (not having diagram) and replace peristome 3 though formed a plurality of peristomes 3.
1-2-1. absorber
Shown in figure 11, the slot part 1 of the absorber 120 of this embodiment is wide at the peak width that forms peristome 3, and is narrow at the peak width that does not form peristome 3.On the contrary, see that convex shaped part 2 is narrow at the peak width that forms peristome 3, sees from CD, and is wide at the peak width that does not form peristome 3 from CD.
And the height of convex shaped part 2 (length of thickness direction) is different at the prolonging direction of convex shaped part 2.That is, shown in Figure 11, Figure 12 (A) and Figure 12 (B), from CD see with the height H a of the convex shaped part 2 of the zone adjacency that forms peristome 3 than seeing that from CD the height H b with the convex shaped part 2 of the zone adjacency that does not form peristome 3 is low.Be not only peristome 3; If also comprise under the situation that forms depressed part; Then see from CD; Be arranged on thickness, than not being thin thickness as the zone in the zone, side of the convex shaped part 2 in high fiber weight per unit area zone as the zone, side of depressed part on the convex shaped part 2 in high fiber weight per unit area zone (not having diagram) or peristome 3 both sides.
See that from the direction (MD) of convex shaped part 2 continuous elongations the top of convex shaped part 2 forms mild waviness at thickness direction.We can say that convex shaped part 2 alternately forms towards the low first convex shaped part 2L of the height of thickness direction with towards the second high convex shaped part 2H of the thickness of thickness direction in the direction of convex shaped part 2 elongation continuously.
The fiber 101 of periphery that is arranged on peristome 3 is directed along all border district of this peristome 3.In other words, from end that the length direction (MD) of the slot part 1 of peristome 3 is seen to direction (CD) orientation of reporting to the leadship after accomplishing a task with this length direction.And, directed along the direction of this length direction (MD) from the sidepiece that the length direction (MD) of the slot part 1 of peristome 3 is seen.
Between peristome 3 and the peristome 3 that is adjacent, form and connect the connecting portion 4 that convex shaped part 2 and convex shaped part 2 ground that are adjacent form.In other words, a plurality of connecting portions 4 that form with the interval of stipulating connect convex shaped parts 2 and the convex shaped part 2 that is adjacent.
As stated, the fiber weight per unit area of the fiber 101 of convex shaped part 2 is adjusted to the zone that is higher than the bottom that constitutes slot part 1.And, the fiber weight per unit area in the zone of the bottom that constitutes slot part 1 is adjusted to the average fiber weight per unit area that is lower than the integral body that comprises slot part 1 and convex shaped part 2.
At this; The absorber 120 of this embodiment is used under the situation of absorbent commodities such as physiological napkin, owing on absorber 120, form peristome 3 in the zone that constitutes as the bottom of hanging down the regional slot part 1 of fiber weight per unit area; Therefore; Even for example full-bodied menses are excreted near the peristome 3, also can make it fall into peristome 3, can suppress the whole surface of covering absorbers such as full-bodied menses.Through like this, for example can suppress the absorbability deterioration of absorbent commodity.
And, because convex shaped part 2 has high part and low part towards the height of thickness direction in the direction (MD, length direction) that forms this convex shaped part 2 continuously, therefore, even convex shaped part 2 is also crooked easily in the direction that forms continuously.Like this, for example absorbent commodity is worn under the state on the health,, is out of shape identically with health further along physical disfigurement.
1-2-2. manufacturing approach
Below describe with regard to the manufacturing approach of the absorber 120 of this embodiment.The fiber web 100 that at first will contain hygroscopicity fibre is placed on the upper face side as the support unit shown in Figure 14 220 of gas permeability support unit.In other words, utilize support unit 220 from following side bearing fiber web 100.
Then, the support unit 220 under the state of this fiber web 100 of supporting is moved to prescribed direction,, can make the absorber 120 of this embodiment through the upper face side continuous injection gas of the fiber web 100 that moves from this.
Support unit 220 is so that elongate parts 225 are arranged on the conveyer along the mode that the direction (CD) with mechanical flow direction (MD) quadrature is provided with.The support unit 220 that fiber web 100 is placed on upper face side moves to the mechanical flow direction.Through like this, to the upper face side of fiber web 100, to the prolonging direction of the elongate parts 225 direction continuous injection gas of quadrature roughly.That is, along mechanical flow direction (MD), in other words along with the prolonging direction of elongate parts 225 roughly the direction of quadrature form slot part 1.And, in forming the zone of slot part 1, after the peristome 3 stated be formed on the zone that is arranged at above the elongate parts 225.
As stated, support unit 220 be with a plurality of elongate parts 225 with the interval almost parallel of regulation be arranged on the top support unit of netted support unit 210.Elongate parts 225 are parts of non-gas permeability, and side (the opposing party's side) is not ventilative downwards to make the gas that sprays from upper side (side's side).In other words, its flow direction of gas that is ejected on the elongate parts 225 changes.
And, elongate parts 225 make constitute fiber web 100 fiber 101 not from the upper side (side's side) of support unit 220 downwards side (the opposing party's side) move.
Therefore, by the gas that sprays from the upper face side of fiber web 100 and/or see through fiber web 100 and changed the gas of flow direction, the fiber 101 that constitutes fiber web 100 is moved by elongate parts 225.
The fiber 101 that is positioned at the zone of having sprayed gas is to moving with the zone of this zone adjacency.Specifically be that the fiber 101 directed to mechanical flow direction (MD, length direction) moves to the direction (CD, width) with mechanical flow direction quadrature.
Through like this, form slot part 1.And mobile and not remaining fiber 101 constitutes the bottom of slot part 1 to width (CD) orientation.That is, the fiber 101 of the bottom of formation slot part 1 is to width (CD) orientation.And, between slot part 1 and the slot part 1 that is adjacent, form convex shaped part 2.The side portion of convex shaped part 2 is because the fiber 101 after above-mentioned move and fibre density improves, and the ratio of the fiber 101 that in the fiber 101 that constitutes this side portion, towards length direction (MD), is provided with improves.
And, as by the gas that sprayed, pass fiber web 100 and changed the gas of flow direction by elongate parts 225, also make the fiber 101 that constitutes fiber web 100 to moving with above-mentioned different direction.
Since the netted support unit 210 that constitutes support unit 220 and elongate parts 225 restriction fibers 101 to support unit 220 be provided with the opposition side of fiber web 100 sides, promptly below side shifting; Therefore, fiber 101 to place the face of fiber webs 100 along support unit 220, direction above promptly moves.
Specifically be, be ejected into elongate parts 225 gas and changing its flow, along the Surface runoff of elongate parts 225.Having changed the gas that flows like this makes the top fiber 101 that is arranged on elongate parts 225 move towards its peripheral region from going up of elongate parts 225.Through like this, when forming regulation shaped aperture portion 3, one or more in orientation, density or the fiber weight per unit area of adjustment fiber 101.
And; Be ejected into temperature, amount or the intensity of the fluid that mainly forms by gas on the fiber web 100 through adjustment; In addition; The translational speed of the fiber web 100 in the adjustment travel mechanism, adjustment tension force etc. even use tabular support unit 230 shown in Figure 24, also can obtain the absorber 120 of this embodiment.
At this, above-mentioned manufacturing installation 90 capable of using is made the absorber 120 of this embodiment.The action of manufacturing installation 90 in this case as stated.
1-3. the 3rd embodiment
According to Figure 16, describe with regard to the multilayer absorber 140 of the 3rd embodiment.The multilayer absorber 140 of the 3rd embodiment is to have the multilayer absorber of absorber 142 that first fibrage 141 and lamination are arranged on the one side side of first fibrage 141.The another side of first fibrage 141 form to a plurality of slot part 1A of the thickness direction depression of multilayer absorber 140 and to thickness direction outstanding see from CD respectively with a plurality of slot part 1A adjacency in, the fiber weight per unit area is than the high a plurality of convex shaped part 2A of fiber weight per unit area of the bottom that constitutes slot part 1A.See that from thickness direction a plurality of slot part 1A and a plurality of convex shaped part 2A are made up of with absorber 142 first fibrage 141.And the shape that constitutes the absorber 142 of convex shaped part 2A is, first fibrage, 141 sides of this absorber 142 towards outstanding with the same side of the another side of first fibrage 141.And the shape that constitutes the absorber 142 of slot part 1A is, first fibrage, 141 sides of this absorber 142 towards with the same side depression of the another side of first fibrage 141.
At this, on multilayer absorber 140,, be not limited to this though slot part 1A roughly equally spaced forms side by side, for example can form by different interval, and, be not side by side but the interval between the slot part 1A forms with changing.And the height of convex shaped part 2 also can be different, can form mutual different height.
And the containing ratio of the vertical directional fiber in the fiber of this convex shaped part of a plurality of convex shaped part 2A formation separately 2A is higher than the containing ratio of horizontal directional fiber.And the containing ratio of the horizontal directional fiber in the fiber in the zone of this slot part of a plurality of slot part 1A formation separately 1A bottom is higher than the containing ratio of vertical directional fiber.
1-3-1. shape
Shown in figure 16, the multilayer absorber 140 of this embodiment is provided with first fibrage 141 through lamination as stated and forms with absorber 142.Multilayer absorber 140 is the one side sides at multilayer absorber 140, specifically is to see the absorber that roughly equally spaced forms a plurality of slot part 1A side by side from CD in first fibrage, 141 sides.And, seeing a plurality of convex shaped part 2A of formation between a plurality of slot part 1A that roughly equally spaced form from CD.This convex shaped part 2A and slot part 1A same general equally spaced form side by side.In this embodiment, though slot part 1A roughly equally spaced forms side by side, be not limited to this, as stated, for example can form by different interval, and, be not side by side but the interval between the slot part 1A that sees from MD forms with changing yet.
A plurality of slot part 1A and a plurality of convex shaped part 2A are formed with absorber 142 by first fibrage 141.At this, the absorber 142 on the multilayer absorber 140 is not the simple sheet that is of uniform thickness, but the shape of being out of shape according to the shape that is formed on a plurality of slot part 1A on first fibrage 141 etc.
At convex shaped part 2A, the face of the opposition side that absorber 142 sides are set of first fibrage 141 constitutes the surface of convex shaped part 2A.Give prominence to the outside of the thickness direction on this oriented multilayer absorber 140 (top in the drawings) U font.And the face of absorber 142 sides of first fibrage 141 is to the shape of giving prominence to mutually with the face on the surface that constitutes convex shaped part 2A the same side U font.
The face of the opposition side of first fibrage, 141 sides on the absorber 142, another the surperficial face (bottom surface) that promptly constitutes multilayer absorber 142 form plane.The face of first fibrage, 141 sides of absorber 142 is along the face convex ground distortion of absorber 142 sides of first fibrage 141.That is, first fibrage, 141 sides of absorber 142 towards with the face U font of the face side of first fibrage 141 to give prominence to the same side of side outstanding.
And, constitute the thin thickness of the thickness of first fibrage 141 on the zone of this slot part 1A bottom than the absorber on the convex shaped part 2A 142.And the thickness of first fibrage 141 that constitutes this slot part 1A bottom is than the thin thickness of the absorber on the convex shaped part 2A 142.
The face of the face side of first fibrage 141 of slot part 1A is the shapes in thickness direction attenuation ground depression.And, first fibrage, 141 sides of absorber 142 towards with the shape of the same side depression of the face of first fibrage, 141 face side.
And the height (thickness direction) of the convex shaped part 2A of multilayer absorber 140 is roughly the same, but also can for example make the convex shaped part 2A that adjoins each other form different height.For example, through the interval that the ejiction opening 913 of the fluid that is formed by gas is sprayed mainly in adjustment, can adjust the height of convex shaped part 2A.For example, the interval of the ejiction opening 913 through making absorber manufacturing installation 90 narrows down, and can reduce the height of convex shaped part 2A, on the contrary, widens the interval of ejiction opening 913, can improve the height of convex shaped part 2A.And, also can alternately form the interval of ejiction opening 913 through making narrow interval and wide interval, alternately form highly different convex shaped part 2A.Like this, under the situation that the multi-layer nonwoven fabrics that is staggered to form highly different convex shaped part 2A and Body contact are provided with, and compare under the situation about highly equating, reduce with the contact area of skin, so have the advantage that can reduce the burden of skin.
At this, the height of convex shaped part 2A is 0.3 to 15mm, is preferably 0.5 to 5mm.And the width of convex shaped part 2A is 0.5 to 30mm, is preferably 1.0 to 10mm.Spacing between the summit of adjacent convex shaped part 2A is 0.5 to 30mm, is preferably 3 to 10mm.
The height of the absorber 142 of convex shaped part 2A (length of thickness direction) is below 95% of height of convex shaped part 2A, and preferably 20 to 90%, 40 to 70% is better.At this, in absorber 142, the height (length of thickness direction) of the part of convex shaped part 2A is formed the height of the part that is higher than slot part 1A.
And the height in the zone of the bottom of formation slot part 1A is below 90% of height of convex shaped part 2A, and preferably 1 to 50%, 5 to 20% is better.The width of slot part 1A is 0.1 to 30mm, is preferably 0.5 to 10mm.Spacing between the adjacent slot part 1A is 0.5 to 20mm, is preferably 3 to 10mm.The height of the absorber of slot part 1A (interior layer) 142 is below 95% of height (length of thickness direction) of slot part 1A, and preferably 20 to 90%, 40 to 70% is better.
At this, the measuring method of the height of convex shaped part 2A or slot part 1A, spacing, width is as follows.For example, multilayer absorber 140 is placed on the workbench, utilizes the section of microscope photographing multilayer absorber 140, measure through its section description or cross-sectional images with the state that does not have pressurization.The summit and the slot part 1A ground that the multilayer absorber 140 of measuring object are passed convex shaped part 2A cut off along CD.
And, during measuring height (length of thickness direction), will play extreme higher position separately, bottom towards the convex shaped part 2A of top and slot part 1A from the upper/lower positions (that is workbench surface) of multilayer absorber 140 as highly measuring.
And when measuring spacing, the spacing of convex shaped part 2 is to measure between the summit that becomes the extreme higher position of adjacent convex shaped part 2A, measures between the center of the center that becomes adjacent slot part 1A.
When measuring width, measure from the upper/lower positions (that is, the workbench surface) of multilayer absorber 140 and rise towards the Breadth Maximum of the bottom surface of the convex shaped part 2A of top, the spacing of slot part 1 and slot part 1A likewise measure the Breadth Maximum of slot part 1A bottom surface.
At this, the section shape of convex shaped part 2A for example can be cheese, trapezoidal, triangle, Ω shape, quadrangle etc., to the not special restriction of its shape.Under the situation about for example using as the top flat of absorbent commodity etc., touch feeling all right of user's skin in order to make, the end face of convex shaped part 2A and side be curve (curved surface) preferably.And the pressure in order to prevent to use makes the geometric distortion that convex shaped part 2A distortion or slot part 1 constitute etc., is preferably formed as the shape that makes narrowed width from the bottom surface of slot part 1A towards end face.Desirable section shape for example is a cheese.
And the section shape of the absorber of convex shaped part 2A (interior layer) 142 can form the regulation shape that describes with regard to above-mentioned shape, not special restriction, but in order the user to be not easy feel the rigidity of absorber 142, the preferably curve (curved surface) of cheese etc.
And, constitute absorber 142 through utilizing hard fibre layer (on-deformable fiber), can make convex shaped part 2A not yielding at thickness direction.
For example, can make the fiber 102 that constitutes first fibrage 141 form the state that the free degree is higher than the average free degree of the fiber 101,102 that constitutes multilayer absorber 140, form the state that the free degree is lower than the average free degree of the fiber 101 that constitutes absorber 142.For example, can the free degree of the fiber 101 that constitutes absorber 142 be adjusted to the free degree that is lower than the fiber 101 that constitutes first fibrage 141.At this, the average free degree of fiber for example is to constitute the fiber 102 of first fibrage 141 and the mean value of the free degree of the fiber 101 that constitutes absorber 142.
In order to make the fiber 102 that constitutes first fibrage 141 form the state of high-freedom degree, for example can make the intersection point intensity part between the fiber 101 different.Specifically be, can adjust first fibrage 141, all or part of bond strength of the intersection point between the fiber of feasible this first fibrage 141 of formation reduces or does not engage.
In order to adjust first fibrage 141, all or part of bond strength of intersection point between the fiber that constitutes first fibrage 141 is reduced or do not engage, but the different multiple fiber of fusing point of the resinous principle on blended fiber 102 surfaces for example.For example with the fiber B of the core sheath structure of the fiber A of the core sheath structure of low density polyethylene (LDPE) (110 ℃ of fusing points) and PETG and high density polyethylene (HDPE) (135 ℃ of fusing points) and PETG; With fiber A: the ratio of fiber B=70:30 is mixed, and constitutes fiber web 100.And; Utilize baking oven etc. this fiber assembly to be carried out under the situation of heat treated with 120 ℃ temperature, the low density polyethylene (LDPE) of the intersection point fusion through the intersection point between the fiber A on the fiber assembly and fiber A and fiber B between the fiber carries out heat fusing.At this, because the amount of the low density polyethylene (LDPE) of fusion is many on the intersection point, therefore, the melt strength of the intersection point between the fiber A is stronger than the melt strength on the intersection point of fiber A and fiber B.And, on the intersection point between the fiber B, because therefore heat fusing does not take place not fusion of high density polyethylene (HDPE).Promptly, become with the intersection point intensity between the fiber A intersection point intensity of fiber A and fiber B the relation of intersection point intensity between the fiber B carries out the state of heat fusing etc.In this case, for example through being that fiber below 120 ℃ constitutes under the situation of absorber 142 with fusing point, can make the intersection point intensity between the fiber of absorber 142 be higher than the fiber intersection point intensity on first fibrage 141.
The fiber 102 that constitutes first fibrage 141 can use the fiber longer than the average fiber length on the multilayer absorber 140.And the fiber 102 that constitutes first fibrage 141 can use the length fiber longer than the length of the fiber 101 that constitutes absorber 142 of this fiber 102.Fibre length is long more, can make fiber spacing leave increasing, is not easy collision between the fiber, so the free degree between the fiber is high.
The fiber 101 that constitutes absorber 142 can use the fiber shorter than the average fiber length of multilayer absorber 140.And the fiber 101 that constitutes absorber 142 can use the length fiber shorter than the length of the fiber 102 that constitutes first fibrage 141 of this fiber 101.Fibre length is short more, fiber spacing is left all the more dwindle, and can improve fibre density.Through like this, can on convex shaped part 2A, density gradient be set, even a spot of menses or sweat attached to the top of convex shaped part 2A, also can make liquid such as menses suitably shift to absorber 142.Can use the fiber that contains the short paper pulp of fibre length more.
In order to reduce the free degree of the fiber 101 that constitutes absorber 142, for example can make absorber 142 contain the crispatura fiber of shape of three-dimensional.Three-dimensional crispatura shape for example be spirality, in a zigzag, Ω shape etc.For example, under the whole fiber alignment situation directed towards in-plane, a part towards thickness direction, because the curved intensity of frustrating of fiber itself is to the thickness direction effect, therefore, even apply external pressure, absorber also is not easy distortion.
And three-dimensional is crispaturaed shape if spirality, because under the state of exerting pressure during pressure relief; Reset into original shape, therefore, even some distortion are arranged at excessive outer second fibrage 142 of depressing; Also resetting into original thickness easily after removing external pressure, is desirable.
The crispatura method of shape of three-dimensional is set on fiber, and the shape that has machinery to crispatura is paid with the shape of thermal contraction and is paid.
Machinery crispatura be to the continuous straight line fiber after the spinning adjust simultaneously that the peripheral speed of line speed is poor, heat, pressurized conditions simultaneously pays.The number of crispaturaing of the unit length of crimp property fiber is many more, can improve the outer relatively curved intensity of depressing of frustrating more.Specifically be that the number of crispaturaing is 10～35/inch, preferably from the scope of 15～30/inch, selects.
It for example is the fiber heating that forms through to two different resins of above fusing point that the shape of thermal contraction is paid, and pays the shape of crispaturaing.Specifically be, to crispatura through the difference embodiment three-dimensional of this percent thermal shrinkage to being designed to because of the different fiber of fusing point difference percent thermal shrinkage heats.The resin formation of seeing from fibre profile for example is the core shift formula of core sheath structure, the different block form of fusing point of left and right sides composition.The percent thermal shrinkage of this fiber is 5～90%, is preferably in 10～80% scope.
At this, the measuring method of percent thermal shrinkage is following, and (1) makes 200g/m with 100% measured fiber 2Fiber web; (2) this fiber is cut into 250 * 250mm size; (3) test portion after will cutting is placed in 145 ℃ baking oven and was carried out heat treated in 5 minutes; (4) measure the length dimension that carries out the test portion after the thermal contraction through this heat treatment, (5) according to before the thermal contraction with thermal contraction before and after length difference calculate percent thermal shrinkage.
Three-dimensional on the absorber 142 is crispaturaed the containing ratio of fiber of shape for example for more than or equal to 30 quality %, preferably more than or equal to 50 quality %.Three-dimensional is crispaturaed under the situation of containing ratio more than or equal to 30 quality % of fiber of shape, and it is restorative with compression on absorber 142, to form the compression retentivity easily, is desirable.
At this, on first fibrage 141, equally also can contain the crispatura fiber of shape of three-dimensional.Three-dimensional on first fibrage 141 is crispaturaed the containing ratio of fiber of shape for example smaller or equal to 30 quality %, preferably smaller or equal to 50 quality %.The fiber 101 that constitutes first fibrage 141 can reduce the fibre density of first fibrage 141 through containing the crispatura fiber of shape of three-dimensional.In this case, liquid is good to the metastatic of absorber 142 from first fibrage 141, is desirable therefore.And, crispatura the containing ratio of fiber of shape smaller or equal to 70 quality % through making three-dimensional on first fibrage 141, can suppress that three-dimensional crispaturas that the fiber end face (otch) of shape touches skin and the foreign body sensation that produces.
And the fiber 101 that constitutes absorber 142 can use the Young's modulus fiber higher than the fiber that constitutes first fibrage 141 102.
At this, the high fiber of Young's modulus that constitutes fiber 101 uses of absorber 142 can use the big fiber of fibrousness.For example, can use the fibrousness big fiber of fibrousness than the fiber 102 that constitutes first fibrage 141.
And the fiber 101 that constitutes absorber 142 for example can use the few fiber 101 of average amount of inorganic matter.The fiber 102 that the average amount that for example uses inorganic matter lacks than the fiber that constitutes first fibrage 141.Inorganic matter for example is inorganic fillers such as titanium oxide.
Above-mentioned absorber 142 fiber that can to use fibre length shorter than the fiber that constitutes first fibrage 141 102, utilize the air lay method to form.Fiber 101 laminations that fibre length is short become specific thickness to form under the situation of absorber 142, can suitably use the air lay method.
Utilize under the situation of the short fiber of air lay method lamination fibre length, the fiber alignment of fiber is easily towards fibrolaminar thickness direction.Liquid such as menses shift along fiber alignment easily; Therefore; For example through air lay method lamination absorber (interior layer) 142; Fiber alignment is adjusted under the situation of thickness direction, and the in-plane of liquid such as menses to the surface of multilayer absorber 140 that can suppress to shift to absorber (interior layer) 142 spreads.And because the fiber alignment of absorber (interior layer) 142 towards thickness direction, therefore, is bent and frustrated the intensity raising, even apply under the situation of external pressure, convex shaped part also is not easy distortion, is desirable.
1-3-2. fiber alignment, fiber density or fiber weight per unit area
1-3-2-1. fiber alignment
Shown in figure 16, the fiber 101,102 of the bottom of formation slot part 1A is to general width direction (laterally, CD) orientation.Fiber 101,102 integral body on first fibrage 141 and the absorber 142 are to width (laterally, CD) orientation.At this; Constitute the free degree and character etc. or the gas intensity that adjustment is sprayed of the fiber 101,102 of first fibrage 141 and absorber 142 through adjustment, can adjust the orientation of the fiber 102 on first fibrage 141 and the orientation of the fiber 101 on the absorber 142 respectively.For example, can adjust, make the ratio on the ratio of the directed fiber 102 of width and absorber 142 on whole first fibrage 141 different to the fiber 101 of width orientation.
And fiber 101,102 length directions along this convex shaped part 2A (MD) direction of the sidepiece of convex shaped part 2A is directed.For example, and the oriented phase ratio of the fiber 101,102 of the central portion of this convex shaped part 2A (zones between the both sides), towards orientated lengthwise.
And in the zone of the bottom that constitutes slot part 1A, the containing ratio of the horizontal directional fiber of unit are is higher than central portion 9, and at sidepiece 8, the containing ratio of the vertical directional fiber of unit are is higher than central portion 9.And, at central portion 9, to zone or the sidepiece more than 8 of the directed fiber 101,102 of thickness direction than the bottom of formation slot part 1A.Through like this, even for example owing to apply load to central portion 9, the thickness of convex shaped part 2A reduces, and under the situation about discharging, the rigidity through to the directed fiber 101,102 of its thickness direction resets into original height easily.That is, can make the restorative high nonwoven fabric of compression.
1-3-2-2. fiber density
Shown in figure 16, the density of the fiber 101,102 in the zone of the bottom that constitutes slot part 1A adjusted to be lower than convex shaped part 2A.The fibre density in the zone of the bottom of this formation slot part 1A can be through the fluid (for example hot blast) that mainly forms by gas various conditions such as amount or tension force carry out freely adjusting.
As stated, the density of the fiber 101,102 of convex shaped part 2A is adjusted to the zone that is higher than the bottom that constitutes slot part 1A.And various conditions such as amount that the fibre density of convex shaped part 2A can be through the fluid (for example hot blast) that mainly formed by gas or tension force carry out freely adjusting.
1-3-2-3. fiber weight per unit area
Shown in figure 16, the fiber weight per unit area of the fiber 101,102 in the zone of the bottom that constitutes slot part 1A adjusted to be lower than convex shaped part 2A.And, the fiber weight per unit area in the zone of the bottom that constitutes slot part 1A is adjusted to the mean value of the fiber weight per unit area that is lower than the integral body that comprises slot part 1A and convex shaped part 2A.
As stated, the fiber weight per unit area of the fiber 101,102 of convex shaped part 2A is adjusted to the zone greater than the bottom that constitutes slot part 1A.
The fiber weight per unit area of whole multilayer absorber 140 is 10 to 200g/m 2, be preferably 20 to 100g/m 2The top flat that for example multilayer absorber 140 is used to be installed in the absorbent commodity of physiological napkin on the health etc. is held concurrently under the situation that absorber uses, and the whole fiber weight per unit area of multilayer absorber 140 is less than 10g/m 2Situation under, damaged danger is for example in use arranged sometimes.Greater than 200g/m 2Situation under, if below other absorbers also are set, then liquid is not easy to shift swimmingly downwards sometimes.
At this, the fiber weight per unit area in the zone of the bottom of formation slot part 1A is below 90% of fiber weight per unit area of convex shaped part 2A, is preferably 3～90%, and 30～70% is better.The fiber weight per unit area of the relative convex shaped part 2A of fiber weight per unit area in the zone of the bottom of formation slot part 1A is greater than under 90% the situation; When dripping to liquid such as menses on the slot part 1A side (opposition side of the hydraulic fluid side of dripping) moving downwards; Resistance strengthens, and menses overflow from slot part 1A sometimes.On the other hand, the fiber weight per unit area of the relative convex shaped part 2A of fiber weight per unit area in the zone of the bottom of formation slot part 1A is less than under 3% the situation, and the strength reduction of multilayer absorber 140 is not suitable for predetermined use sometimes.For example, under the situation of multilayer absorber 140, under the state that uses this absorbent commodity, take place damaged sometimes as the top flat use of absorbent commodities such as physiological napkin.
The fiber weight per unit area of convex shaped part 2A for example is 15 to 250g/m 2, be preferably 25 to 120g/m 2And the fibre density of convex shaped part 2A is 0.20g/cm 3Below, be preferably 0.005 to 0.20g/cm 3, 0.007 to 0.07g/cm 3Better.
The fiber weight per unit area of convex shaped part 2A is lower than 15g/m 2Situation under or density be lower than 0.005g/cm 3Situation under, convex shaped part 2A is because the weight or the external pressure easy deformation of liquid such as menses sometimes.And the menses that once absorbing are depressed easy refluence adding sometimes.
The fiber weight per unit area of convex shaped part 2A is higher than 250g/m 2Situation under or density be higher than 0.20g/cm 3Situation under, the menses that are excreted to convex shaped part 2A are not easy to move downwards, are trapped in convex shaped part 2A sometimes.
The fiber weight per unit area in the zone of the bottom of formation slot part 1A for example is 3～150g/m 2, be preferably 5～80g/m 2And the fibre density in the zone of the bottom of formation slot part 1A is 0.18g/cm 3Below, be preferably 0.002 to 0.18g/cm 3, 0.005 to 0.05g/cm 3Better.
The fiber weight per unit area in the zone of the bottom of formation slot part 1A is less than 3g/m 2Situation under or density less than 0.002g/cm 3Situation under, hold concurrently under the situation that absorber uses as top flat, as stated, on the absorbent commodity that multilayer absorber 140 is provided with as the top flat of absorbent commodities such as physiological napkin, in use take place damaged sometimes easily.
On the other hand, the fiber weight per unit area in the zone of the bottom of formation slot part 1A is greater than 150g/m 2Situation under or density greater than 0.18g/cm 3Situation under, the liquid such as menses that drip to slot part 1A sometimes accumulate in slot part 1A.In this case, liquid overflows from slot part 1A sometimes.
At this, the fiber weight per unit area of first fibrage 141 and absorber 142 is preferably in the scope of 20:80 to 50:50 than the scope at 10:90 to 90:10.Under the situation that multilayer absorber 140 is used as the top flat of absorbent commodities such as physiological napkin, hold concurrently under the situation that absorber uses as top flat; If the fiber weight per unit area of the relative multilayer absorber 140 of fiber weight per unit area of first fibrage 141 is lower than 10%, the danger that first fibrage is damaged, absorber exposes is arranged then.On the contrary, if the fiber weight per unit area of the relative multilayer absorber 140 of fiber weight per unit area of first fibrage 141 is higher than 90%, then absorptive capacity is few, even a spot of excreta etc. also might spill.
Slot part 1A or convex shaped part 2A satisfy under the situation of above-mentioned condition, even for example a large amount of menses are excreted under the situation on the multilayer absorber 140 or drain under the situation of full-bodied menses, also can suppress menses and spread from the teeth outwards.For example,, also keep the last space of slot part 1 (indentation) 1A easily even multilayer absorber 140 receives external pressure, some distortion take place convex shaped part 2A, therefore, under this state, even under the situation of drainage menses etc., also can be suppressed at surperficial large tracts of land diffusion sometimes.And, even the menses that once absorbed etc. are depressed refluence outside, since little with the contact area of skin, therefore can suppress once more in large area attached on the skin.
Through the fiber weight per unit area of convex shaped part 2A is heightened, fiber number increases, so fusion increases of counting, the maintenance porous structure.
At this; The multilayer absorber 140 of this embodiment is used under the situation of absorbent commodities such as physiological napkin; Because it is moulding simultaneously is as first fibrage 141 and absorber 142 of top flat, therefore, in fact very close to each other between as first fibrage 141 of top flat and absorber 142.Therefore, can suitably carry menses etc. to absorber from the superficial layer of absorbent commodity.This with after the 4th embodiment, the 5th embodiment and the absorbent commodity stated identical.
1-3-3. manufacturing approach
Below describe with regard to the manufacturing approach of the multilayer absorber 140 of this embodiment.
At first; To have no illustrated first fiber assembly and no illustrated absorber and be placed on upper face side as the netted support unit 210 of gas permeability support unit with the fiber web 100 of the multi-layer fiber aggregate of fiber assembly; First fiber assembly is to form the roughly fiber assembly of sheet, is to constitute the state that the fiber of this fiber assembly has the free degree; Absorber is the lamination one side side that is arranged on first fiber assembly, forms the roughly fiber assembly that contains hygroscopicity fibre of sheet with fiber assembly, is to constitute the state that the fiber of this fiber assembly has the free degree.In other words be that netted support unit 210 is from following side bearing fiber web 100.At this, also can the specific fibre lamination be arranged on the predetermined surface of netted support unit 210, form above-mentioned multi-layer fiber aggregate.
Then, the netted support unit 210 under the state that supports this fiber web 100 is moved to mechanical flow direction (MD).Then, through the upper face side continuous injection gas of the fiber web 100 that moves from this, can make the multilayer absorber 140 of this embodiment.
Can make the multilayer absorber 140 of this embodiment through above-mentioned absorber manufacturing installation 90.The manufacturing approach of the absorber of this absorber manufacturing installation 90 etc. can be with reference to above-mentioned record.
1-4. the 4th embodiment
According to Figure 17, describe with regard to the multilayer absorber 150 of the 4th embodiment.Multilayer absorber 150 is the multilayer absorbers that form a plurality of peristome 3A with the interval of regulation in the bottom as the regional slot part 1A of low fiber weight per unit area of the multilayer absorber 140 of the 3rd embodiment.
At this, on multilayer absorber 150, form the peristome 3A of the low fiber weight per unit area portion of a plurality of conducts in the bottom of slot part 1A, but also can replace peristome 3A, form the depressed part of the thickness attenuation ground formation of the multilayer absorber 150 that makes slot part 1A.And peristome 3A is also included within the shape that thickness direction is not completed into opening (part of a 3A of open communication portion).
The bottom surface of the slot part 1A of multilayer absorber 150 is to have the shape of difference of height along the direction that forms this slot part 1A.The direction that forms slot part 1A forms low fiber weight per unit area such as a plurality of slot part 1A portion continuously with the interval of regulation when; Through forming difference of height along the direction that forms this slot part 1A; Can suppress liquid such as menses and flow along slot part 1A, be desired shapes therefore.
Like Figure 17 or shown in Figure 180, all or part of of each peripheral side wall portion 33A of this peristome of the formation of a plurality of peristome 3A 3A covered by the part of first fibrage 141.
For example, see that the 33A of side walls portion is covered by first fibrage 141, see that from the direction (MD) of the slot part 1A elongation of peristome 3A the side wall portion 33A of end is covered by first fibrage 141 from the direction (MD) of the slot part 1A of peristome 3A elongation.And, on this side wall portion 33A, do not exposed the absorber 142 that is arranged on lower floor by first fibrage, 141 region covered.
And shown in figure 18, the zone that does not form peristome 3A on slot part 1A, the bottom of slot part 1A have the zone of first fibrage, 141 formations and the zone that absorber 142 constitutes.Specifically be near the end of the periphery of the peristome 3A of slot part 1A, the periphery seen from the direction (MD) of slot part 1A elongation, to have not by first fibrage, 141 region covered.Expose absorber 142 in this zone.
And, on first fibrage 141, form in a plurality of slot parts, form a plurality of peristomes in the position of the peristome 3A that is equivalent to multilayer absorber 150.This peristome is compared with peristome 3A on the multilayer absorber 150, sees from the direction (MD) of slot part 1A elongation, forms the elliptical shape of lengthwise.
At this, the multilayer absorber 150 of this embodiment is used under the situation of absorbent commodity of physiological napkin etc., identical during with the absorber 120 that uses the second above-mentioned embodiment, can suppress the anastomose property of absorbefacient deterioration and raising and health etc.
And; The main fiber that is formed by synthetic fiber constitutes first fibrage 141; Be that the fiber of main body constitutes under the situation of absorber 142 mainly by hygroscopicity fibre, fall into depressed part (not having diagram) with and/or the liquid such as menses of peristome 3A be not easy by this depressed part with and/or the side wall portion 33A of peristome 3A, see partially absorbing of two sides from MD.Promptly; Since be formed on constitute as the zone of the bottom of the slot part 1A in low fiber weight per unit area zone, constitute depressed part (not having diagram) with and/or all or part of of the side wall portion 33A of the periphery of peristome 3A covered by first fibrage 141; Therefore; Fall into depressed part with and/or the liquid such as menses of peristome 3A be not easy at side wall portion 33A, see from the part of two sides from MD and shift to the hygroscopicity fibre of absorber 142.And (the mechanical flow direction, shift to the hygroscopicity fibre of absorber 142 by the end of MD) seeing from the direction of continuous formation slot part 1A for liquid such as menses.Through like this, can further suppress of the infiltration of liquid such as menses to width.
1-5. the 5th embodiment
According to Figure 19, describe with regard to the multilayer absorber 160 of the 5th embodiment.Multilayer absorber 160 is that the second fibrolaminar multilayer absorber is set on the multilayer absorber 140 of the 3rd embodiment again.That is, be the multilayer absorber that second fibrage 143 is set again on the face of the opposition side of first fibrage 141 of the absorber 142 on the multilayer absorber 140 of the 3rd embodiment.
First fibrage 141 preferably forms through the combing method lamination.Absorber 142 preferably forms on the face of a side of first fibrage 141 through the fiber lamination that the air lay method will constitute this absorber 142.
Second fibrage 143 preferably forms through the combing method lamination.Through second fibrage 143 is set again, can pay function or intensity of regulation etc.For example, through second fibrage 143 is set, can improve shape retention or resiliency etc.
Manufacturing approach with regard to the multilayer absorber 160 of this embodiment describes.At first; To have first fiber web, absorber is arranged on the predetermined surface of netted support unit 210 shown in Figure 4 with the fiber web and the second fibroreticulate multi-layered web; From a side bearing of multi-layer fiber aggregate on netted support unit 210; Wherein, first fiber web is the fiber web that forms sheet, is to constitute the state that the fiber of this fiber assembly has the free degree; Absorber is that lamination is arranged on the first fibroreticulate one side side, forms the roughly fiber web that contains hygroscopicity fibre of sheet with fiber web, is to constitute the state that the fiber of this fiber assembly has the free degree; Second fiber web be arranged on absorber with the fibroreticulate first fibrolaminar opposition side, be to form the roughly fiber web of sheet, be to constitute the state that this fibroreticulate fiber has the free degree.
Then, (the mechanical flow direction MD) moves to prescribed direction to make the multi-layer fiber aggregate that is supported by netted support unit 210 through the travel mechanism that stipulates.Then, for example through the fluid of injection equipment from mainly being formed by gas by the injection of the another side side of the multi-layer fiber aggregate that moves to above-mentioned prescribed direction.
At this; Through second fiber web being arranged on the predetermined surface of netted support unit 210; The formation absorber is formed absorber with fibroreticulate, as to contain hygroscopicity fibre fiber lamination use fiber web on the face of the opposition side of second fibroreticulate netted support unit 210 sides; The first fiber web lamination is arranged on absorber after this formation with the opposition side of second web-side on the fiber web, forms multi-layered web.At this, absorber for example is formed on the predetermined surface on second fiber assembly through the air lay method with fiber web.
1-6. the 6th embodiment
According to Figure 20, describe with regard to the absorber 111 of the 6th embodiment.Absorber 111 is the absorbers that on the absorber 110 of first embodiment, also contain macromolecule absorber 103.
Shown in figure 20; In the absorber 111 of this embodiment, macromolecule absorber 103 leans on partially to be arranged on and forms as the regional of the bottom of the formation slot part 1A of low fiber weight per unit area and as the opposing face side of the face of the convex shaped part 2 of high fiber weight per unit area.Macromolecule absorber 103 is present in wherein with the state that mixes with the fiber 101 that constitutes absorber 111.To the not special restriction of the shape of this macromolecule absorber 103, be powdery, granular, fibrous.
The absorber 111 of this embodiment can be through mixing on the fiber web 100 that the fiber 101 that contains hygroscopicity fibre and macromolecule absorber 103 form, sprays the main fluid that is formed by gas and form to the one side side of this fiber web 100.Through spraying the fluid that mainly forms, when forming slot part 1 and convex shaped part 2, can make macromolecule absorber 103 to the another side side shifting by gas to the one side side of fiber web 100.
Utilize said method to make under the situation of absorber 111, macromolecule absorber 103 is in order mainly not formed fluid to the ejection of the outside of absorber 111 by gas, and is preferably fibrous.
Liquid (for example menses) continuously or intermittently drops under the situation of one side side of formation slot part 1 and convex shaped part 2 of absorber 111 of this embodiment, and this liquid is at first absorbed by hygroscopicity fibre.Then, the liquid that is not absorbed by this hygroscopicity fibre is absorbed by macromolecule absorber 103.At this, therefore macromolecule absorber 103, even absorb under the situation of liquid, expansion, also is not easy to make the warpage of slot part 1 and convex shaped part 2 owing to be arranged on opposing face one side of leaning on the face that forms slot part 1 and convex shaped part 2 partially.
1-7. the 7th embodiment
According to Figure 21, describe with regard to the absorber 112 of the 7th embodiment.Absorber 112 is absorbers that macromolecule absorber 103 is set on the slot part 1 of the absorber 110 of first embodiment.
Shown in figure 21, on the absorber 112 of this embodiment, macromolecule absorber 103 is arranged on slot part 1.Specifically be to be arranged on the recess of slot part 1 with accommodating the macromolecule absorber.Through like this, expose the zone, the crown and the macromolecule absorber 103 of convex shaped part 2 at the upper face side of absorber 112.The absorber 112 of this embodiment can be accommodated macromolecule absorber 103 through the recess of the slot part 1 on the absorber 110 that makes first embodiment and formed.
Liquid (for example menses) continuously or intermittently drops under the situation of one side side of formation slot part 1 and convex shaped part 2 of absorber 112 of this embodiment; The liquid that drops in convex shaped part 2 is absorbed by hygroscopicity fibre, and the liquid that drops on the macromolecule absorber 103 is directly absorbed by macromolecule absorber 103.
1-8. the 8th embodiment
According to Figure 22, describe with regard to the absorber 113 of the 8th embodiment.Absorber 113 is that the absorber 110 that the upper face side lamination at the absorber 112 of the 7th embodiment is provided with first embodiment makes the absorber of slot part 1 grade towards absorber 112 sides.
Shown in figure 22, on the absorber 113 of this embodiment, macromolecule absorber 103 is accommodated the absorber 112 that is arranged on institute's lamination and the space between the absorber 110.Specifically be, can the face that form slot part 1 and convex shaped part 2 on the face that form slot part 1 and convex shaped part 2 on the absorber 112 and the absorber 110 be set, make the head butt ground of mutual convex shaped part 2 relatively form absorber 113 through lamination.And macromolecule absorber 103 is arranged on slot part 1 region facing of the slot part 1 and the absorber 110 of the absorber 112 on the absorber 113.
Liquid (for example menses) continuously or intermittently drops under the situation of one side side of absorber 113 of this embodiment, and at first, liquid is absorbed by hygroscopicity fibre, and the liquid that is not absorbed by hygroscopicity fibre etc. are absorbed by macromolecule absorber 103.Macromolecule absorber 103 is owing to be housed in the private side of absorber 113 with having expandable space, therefore, even absorption liquid, expanding can not spill yet, and, can not make the shape of whole absorber 113 that big distortion is arranged.
1-9. fiber constitutes
The fiber that below illustrates first fibrage, second fibrage and the absorber of above-mentioned embodiment constitutes.
First fibrage for example is the fibrage that has mixed fiber A and fiber B; Fiber A is the core sheath structure of low density polyethylene (LDPE) (110 ℃ of fusing points) and PETG; Average fineness is that 3.3dtex, average fiber length are 51mm, has coated hydrophilic finish; Fiber B is the core sheath structure of high density polyethylene (HDPE) (135 ℃ of fusing points) and PETG, and average fineness is that 3.3dtex, average fiber length are 51mm, has coated the waterproof finish.Fiber A and fiber B contain with the mixing ratio of 70:30, and the fiber weight per unit area is adjusted to 15g/m 2Absorber is 100% comminution pulp, and the fiber unit are is 100g/m 2First fibrage utilizes combing method to open fibre, and absorber is opened fibre with the air lay method.Second fibrage for example is the core sheath structure of high density polyethylene (HDPE) and PETG, is that average fineness is that 4.4dtex, average fiber length are 38mm, has coated the fibrage of 100% fiber of hydrophilic finish.This fibrolaminar fiber weight per unit area is 25g/m 2
And; First fibrage for example is the core sheath structure of high density polyethylene (HDPE) (135 ℃ of fusing points) and PETG; Be that average fineness is that 2.2dtex, average fiber length are 51mm; Relative each quality of core sheath is mixed 2 quality %/mix the titanium oxide of 3 quality % to sheath to core, has coated the fibrage of 100% fiber of hydrophilic finish.This fibrolaminar fiber weight per unit area is 20g/m 2Absorber for example is the fibrage that contains fiber C and fiber D; Fiber C is the core sheath structure of the core shift type of high density polyethylene (HDPE) and PETG; Be that average fineness is that 5.6dtex, average fiber length are 51mm; The quality of core is mixed the titanium oxide of 1 quality % relatively, has coated hydrophilic finish, and fiber D is that artificial silk, average fineness are that 3.3dtex, average fiber length are 45mm.Fiber C on this fibrage and the mixing ratio of fiber D are 50:50, and the fiber weight per unit area is 100g/m 2Second fibrage is the core sheath structure of high density polyethylene (HDPE) and PETG, is that average fineness is that 2.2dtex, average fiber length are 38mm, has coated 100% fiber of hydrophilic finish, and the fiber weight per unit area is 20gsm.First fibrage and second fibrage are all opened fibre with combing method.
And, below illustrate and form each fibrolaminar fiber that fiber assembly and combing method that the first fibrolaminar fiber assembly, air lay method form absorber form on the multilayer absorber that the second fibrolaminar fiber assembly constitutes by combing method and constitute etc.
First fibrage for example is high density polyethylene (HDPE) and the polyacrylic core sheath structure of PETG; Be that average fineness is that 3.3dtex, average fiber length are 51mm; Each quality of relative core sheath; Mix the titanium oxide that 1 quality %/sheath mixes 2 quality % to core, coated 100% fiber of hydrophilic finish, utilize combing method to make the fiber weight per unit area be 15g/m 2The fibrage that ground forms.
Absorber for example is to mix comminution pulp and emboliform macromolecule absorber, and the mixed macromolecule absorber with 10 quality % of comminution pulp utilizes the air lay method to make the fiber weight per unit area be 110g/m 2The fibrage that the ground lamination forms.
Second fibrage for example is the fibrage that contains fiber C and fiber D, and fiber D is that artificial silk, average fineness are that 3.3dtex, fibre length are 45mm.Fiber C on this fibrage and the mixing ratio of fiber D are 50:50, utilize combing method to make the fiber weight per unit area be 20g/m 2The fibrage that the ground lamination forms.
2. absorbent commodity
According to Figure 23, describe with regard to absorbent commodity 170.Absorbent commodity 170 has the absorber 142 of the one side side that first fibrage 141, lamination be arranged on first fibrage 141 and the liquid non-permeable film 144 that is arranged on first absorbed layer, 141 opposition sides on the absorber 142.And, second fibrage 143 is set between absorber 142 and liquid non-permeable film 144.
Another side on first fibrage 141 forms a plurality of slot part 1A and a plurality of convex shaped part 2A, and slot part 1A is to the thickness direction depression of this absorbent commodity 170; Convex shaped part 2A is outstanding to thickness direction, with a plurality of slot part 1A respectively adjacency the time, the fiber weight per unit area is higher than the fiber weight per unit area in the zone of the bottom that constitutes slot part 1A.
A plurality of slot part 1A and a plurality of convex shaped part 2A lamination respectively are provided with first fibrage 141 and absorber 142.Absorber 142 on the convex shaped part 2A be on this absorbent commodity 170 first fibrage, 141 sides towards with first fibrage 141 on the outstanding shape of same side of another side.
And the containing ratio of the vertical directional fiber of a plurality of convex shaped part 2A (especially sidepiece) is higher than the containing ratio of horizontal directional fiber.The containing ratio of the horizontal directional fiber of the fiber in the zone that is arranged on the bottom that constitutes these a plurality of slot part 1A of a plurality of slot part 1A is higher than the containing ratio of vertical directional fiber.
And the interval that on a plurality of slot part 1A, also can stipulate forms a plurality of depressed parts (not having diagram) and/or a plurality of peristome.All or part of of the side wall portion of the periphery of these a plurality of depressed parts of the formation of a plurality of depressed parts and/or a plurality of peristomes and/or a plurality of peristomes covered by first fibrage 141.
And absorbent commodity of the present invention for example forms through the liquid non-permeable film being arranged on absorbent commodity or the predetermined surface on the multilayer absorber in each above-mentioned embodiment.Especially, through the liquid non-permeable film being arranged on the predetermined surface from the multilayer absorber of above-mentioned the 3rd embodiment to the five embodiments, obtaining absorbent commodity of the present invention easily, is desirable therefore.
3. embodiment
3-1. first embodiment
< fiber formation >
First fibrage uses the fibrage mixed fiber A and fiber B, and fiber A is the core sheath structure of low density polyethylene (LDPE) (110 ℃ of fusing points) and PETG, average fineness 3.3dtex, the long 51mm of average fiber, coats hydrophilic finish; Fiber B is the core sheath structure of high density polyethylene (HDPE) (135 ℃ of fusing points) and PETG, average fineness 3.3dtex, the long 51mm of average fiber, coats the waterproof finish.The mixing ratio of fiber A and fiber B is 70:30, and the fiber weight per unit area is adjusted to 15g/m 2
Absorber blended fiber C and fiber D; Fiber C is the core sheath structure of the core shift formula of high density polyethylene (HDPE) and PETG, is that average fineness is that 5.6dtex, average fiber length are 51mm, and the quality of core is mixed the titanium oxide of 1 quality % relatively; Coated hydrophilic finish; Fiber D is that artificial silk, average fineness are that 3.3dtex, fibre length are 45mm, and the mixing ratio of fiber C and fiber D is 50:50, and the fiber weight per unit area is 100g/m 2
< creating conditions >
Forming a plurality of diameters is that 1.0mm, spacing are the ejiction opening 913 of 6.0mm.And being shaped as of ejiction opening 913 is just round, and the section shape of hole (ejiction opening) is circular.The width of ejection portion 910 is 500mm.With temperature is 105 ℃, and air quantity is that the condition that 1200l/ divides is sprayed hot blast.
Utilize speed for the carding machine that 20m/ divides the reel that the fiber shown in above constitutes to be opened fibre, make the fiber web of multilayer, cut this multi-layered web, making width is 450mm.The gas permeability that the fiber web setting is transported to 20 eyelets that the speed of dividing with 3m/ moves to prescribed direction is online.Ejiction opening 910 through shown in above sprays above-mentioned hot blast to the one side of multi-layered web, on the other hand, attracts (air-breathing) from the below of gas permeability net with the uptake that is less than hot blast rate.After forming concavo-convex (slot part, convex shaped part) like this, under the state that utilizes above-mentioned gas permeability net to carry, being transported to and setting temperature for is in 125 ℃, the baking oven of hot blast air quantity for 10Hz about 30 seconds.
< result >
Convex shaped part: the fiber weight per unit area is 131g/m 2, thickness is that 3.4mm (top thickness is 2.3mm), fibre density are 0.06g/cm 3, a convex shaped part width be that 4.6mm, spacing are 5.9mm.
Absorber on the convex shaped part: thickness is 2.9mm (top thickness is 1.3mm).
Slot part: the fiber weight per unit area is 58g/m 2, thickness is that 1.7mm, fibre density are 0.03g/cm 3, a slot part width be that 1.2mm, spacing are 5.8mm.
Shape: the back side of slot part is positioned at the back side of absorber, and the back side shape of convex shaped part is to the top protuberance, is arranged on the position at the back side that does not form this absorber.Convex shaped part cheese, convex shaped part and slot part alongst form continuously, see from width, repeatedly form each other.And, on the surface of convex shaped part, be not only the formation of the intersection point intensity that partly forms between the different fibers, and, minimum density formed.
3-2. second embodiment
< fiber formation >
It is identical with the fiber formation of first embodiment that fiber constitutes.
< creating conditions >
Utilize the designs of nozzles shown in above-mentioned, be 105 ℃ in temperature, air quantity is when spraying hot blast under the 1000l/ condition of dividing, and attracts (air-breathing) from the below of gas permeability net with the uptake roughly the same or strong slightly with hot blast rate.
< result >
Absorber with regard to obtaining carries out following explanation.
Convex shaped part: the fiber weight per unit area is 129g/m 2, thickness is that 2.5mm, fibre density are 0.05g/cm 3, a convex shaped part width be that 4.7mm, spacing are 6.1mm.
Absorber on the convex shaped part: thickness is 2.9mm.
Slot part: the fiber weight per unit area is 33g/m 2, thickness is that 1.8mm, fibre density are 0.02g/cm 3, a slot part width be that 1.4mm, spacing are 6.1mm.
Shape: the bottom shape of convex shaped part forms even shape.
3-3. the 3rd embodiment
< fiber formation >
First fibrage uses the core sheath structure of high density polyethylene (HDPE) and PETG; Be that average fineness is that 3.3dtex, average fiber length are 51mm; Each quality of relative core sheath; Mix 1 quality %/mix the titanium oxide of 2 quality % to sheath to core, coated 100% fiber of hydrophilic finish, making the fiber weight per unit area through combing method is 15g/m 2Fibrage.
Absorber is 100% comminution pulp, and the fiber weight per unit area is 100g/m 2
It for example is the fibrage that contains fiber C and fiber D; Fiber C is the core sheath structure of the core shift formula of high density polyethylene (HDPE) and PETG; Be that average fineness is that 5.6dtex, average fiber length are 51mm; The quality of core is mixed the titanium oxide of 1 quality % relatively, has coated hydrophilic finish, and fiber D is that artificial silk, average fineness are that 3.3dtex, average fiber length are 45mm.Fiber C on this fibrage and the mixing ratio of fiber D are 50:50, and the fiber weight per unit area is 20g/m 2, with the fibrage of combing method lamination formation.
< creating conditions >
Identical with first embodiment creates conditions.
< result >
Absorber with regard to obtaining carries out following explanation.
Convex shaped part: the fiber weight per unit area is 162g/m 2, thickness is that 2.9mm, fibre density are 0.06g/cm 3, a convex shaped part width be that 4.7mm, spacing are 6.1mm.
First fibrage on the convex shaped part/absorber/second fibrage: thickness is 1.0mm/1.3mm/0.6mm.
Slot part: the fiber weight per unit area is 88g/m 2, thickness is that 1.8mm, fibre density are 0.05g/cm 3, a slot part width be that 1.4mm, spacing are 6.1mm.
3-4. the 4th embodiment
< fiber formation >
Fiber constitutes identical with first embodiment.
< creating conditions >
Except using following supporting mass to replace the gas permeability net, identical with first embodiment.
<supporting mass >
Use tabular support unit 230 shown in Figure 24, hole portion 233 is for long 2mm * wide 70mm, have the tabular support unit of the interval formation of 3mm with the hole portion 233 of adjacency.The thickness of tabular support unit 230 is 0.5mm.Material is stainless steel.
< creating conditions >
Identical with first embodiment
< result >
Absorber with regard to obtaining carries out following explanation.
Convex shaped part: the fiber weight per unit area is 155g/m 2, thickness is that 2.8mm, fibre density are 0.06g/cm 3, a convex shaped part width be that 4.7mm, spacing are 6.5mm.
Absorber on the convex shaped part: thickness is 1.5mm.
Slot part: the fiber weight per unit area is 77g/m 2, thickness is that 1.2mm, fibre density are 0.06g/cm 3, a slot part width be that 1.8mm, spacing are 6.5mm.
Little protrusion on the slot part: the fiber weight per unit area is 93g/m 2, thickness is that 1.9mm, fibre density are 0.05g/cm 3, a little protrusion width be that the length of 1.8mm, a little protrusion is that 1.5mm, CD spacing are that 6.5mm, MD spacing are 5.0mm.
Micro-pits portion (peristome) on the slot part: the fiber weight per unit area is 0g/m 2, thickness is that 0mm, fibre density are 0g/cm 3, a micro-pits portion width be that the length of 1.8mm, a micro-pits portion is that 3.2mm, CD spacing are that 6.5mm, MD spacing are 5.0mm, the perforated area of a micro-pits portion is 4.2mm 2Lengthwise rectangle, the perforate shape of fillet.
Shape: form little protrusion and micro-pits portion (perforate) at slot part 1.
4. purposes is routine
As the purposes of absorber of the present invention, absorbent commodities such as physiological napkin, protection pad, diaper for example.Can be used as these absorbers or the top flat absorber of holding concurrently uses.In this case, convex shaped part can towards the rear side of the opposition side of skin surface side, skin surface side one of them, through being formed on the skin surface side,, be not easy the moist feeling that body fluid produces owing to dwindle with the contact area of skin.And, also can be used for removing attached to the rag of dust on the floor or on the health or dirt or put into many aspects such as hygenic towelette or wet rag, face shield, absorbent breast pad of medicament in advance.
At this; Will be as the absorber of the embodiment of this case; Promptly; The fiber weight per unit area of bottom that contain hygroscopicity fibre, has concavo-convex, this recess in the one side side is low relatively, and the most of fiber on the recess describes to the situation that the directed absorber of width (horizontal stroke) direction is used for protuberance is arranged on the absorbent commodity of top flat side.
The fiber weight per unit area in zone of bottom that constitutes slot part 1 is low relatively, and this is because when constituting slot part 1, fiber moves.And, because the fiber after mainly moving through this forms the sidepiece 8 of convex shaped part 2, therefore, at sidepiece 8, many to the directed vertical directional fiber of length direction (vertically, MD).Through like this, guided to length direction owing to drip to or move to the liquid of sidepiece 8, therefore, can suppress liquid and spread, cause leakage to width (CD), can improve the absorption efficiency of absorber to liquid.And absorbent commodity can slot part 1 be the starting point easy deformation, and is high to the anastomose property of health, therefore, is not easy to make the user that foreign body sensation is arranged.And, since intensive between the fiber of the sidepiece 8 of convex shaped part 2, so rigidity is high, and, because the central portion 9 of convex shaped part 2 contains many fibers to the thickness direction orientation, therefore,, also be not easy distortion even apply load to thickness direction to convex shaped part 2.And even apply load, convex shaped part deforms, because therefore the restorative height of compression returns to original volume easily.Through like this, be not easy to flow backwards in case be absorbed the liquid of bulk absorption, the liquid of refluence is not easy attached on the skin.
5. respectively constitute thing
5-1. fiber assembly
Fiber assembly (fiber web) be form fiber assembly roughly sheet, that contain hygroscopicity fibre, constitute this fiber assembly fiber be state with free degree.In other words, be the fiber assembly that has the free degree between the fiber.In other words, fiber assembly is that at least a portion of the fiber of formation fiber assembly is a free state.And fiber assembly is that at least a portion that constitutes the fiber of multi-layer fiber aggregate exists with the state that can change the mutual alignment relation.This fiber assembly for example can mix the blended fiber of many fibers through ejection, the fibrage of formation specific thickness is made.And, also can be for example repeatedly to carry out lamination, the ejection ground formation of formation fibrage ground through many different fibers are divided into.
As fiber assembly of the present invention, for example have through the fiber web of combing method formation or by the heat fusing of heat fusing between fiber fiber web before takes place to solidify.And, net that the air lay method forms is for example arranged or taken place to solidify by heat fusing, heat fusing between fiber before fiber web.And, can be the heat fusing generation curing fiber web of using after the some Method for bonding carries out embossing before.And, can be through spun-bond process spin, fiber assembly before the embossing or the heat fusing after the embossing fiber assembly before taking place to solidify.And, can be the fiber web that partly interweaves that needle point method forms.And, can be the fiber web that partly interweaves that jet net-spraying method forms.Can be fiber assembly before to take place to solidify through the heat fusing that meltblown is carried out between spinning, the fiber.And, can be fiber assembly before to take place to solidify through solvent, heat fusing that the solvent welding method forms.And, can form multiple stratification by overlapping these.
Fiber assembly or under the many situation of the short fiber of fibre length, is preferably used fiber assembly through the air lay legal system as absorber under the fibroplastic situation short by fibre length.And fiber assembly or under the many situation of the long fiber of fibre length, is preferably made absorber through combing method and is used fiber assembly under the fibroplastic situation long by fibre length.
In addition, the preferably free degree between the fiber that through air-flow (gas) fiber is arranged again easily heat fusing high, that only form net before through interweaving.And; For through after after many air (gas) stream stated forms slot parts (concavo-convex) etc.; Keep this shape invariance ground to carry out absorber and handle, preferably use through utilizing predetermined heating device etc. to carry out baking oven and handle (heat treated) and make the gas of the thermoplasticity fiber heat fusing that contains in the fiber assembly wear method.
5-2. fiber
Absorber of the present invention and absorbent commodity contain hygroscopicity fibre at least.Hygroscopicity fibre is to have absorptive fiber and paid absorptive fiber.Having absorptive fiber for example is cellulosic fibre.This cellulosic fibre for example is semisynthetic fibre elements such as comminution pulp or three acetic acid etc.Can separately or mix and use.
Paying absorptive fiber for example is thermoplastic resins such as low density polyethylene (LDPE) or polyamide.And, in order to pay water imbibition, for example have and mix hydrophilizing agent or carry out processing such as coating, or handle or plasma treatment has been paid hydrophilic fiber through corona.These fibers for example are fiber or the structurally compound multiple fibroplastic composite fibres that uses various resins separately.
Composite fibre for example is different block form of the fusing point of core shift formula, left and right sides composition of the fusing point of the core composition core sheath formula that is higher than the sheath composition, core sheath etc.And, also can use open-core type, flat or abnormity such as Y type or C type, or potentially crispatura or the three-dimensional crinkled fibre crispaturaed in the surface, cut apart fiber etc. through what physical loads such as current or heat or embossing were cut apart.
Under situation about using as absorber, if consider the infiltration or the maintenance of liquid, the fiber number of paying above-mentioned absorptive fiber or having an absorptive fiber is in 2.2 to 8.8dtex scope.As first fibrage with situation that skin directly contacts under, consider liquid infiltration or with the sensation of contact skin, be preferably in 1.1 to 8.8dtex scope.
And,, also can contain for example inorganic fillers such as titanium oxide, barium sulfate, calcium carbonate in order to improve emulsibility.Under the situation of the composite fibre of core sheath formula, can have only core to contain inorganic filler, or sheath also contain.
And,, can mix the surperficial crinkled fibre or the potential crinkled fibre of regulation in order to form the three-dimensional shape of crispaturaing.At this, three-dimensional crispatura shape be spirality, in a zigzag, shape such as Ω shape, even fiber alignment integral body towards in-plane, a part is also towards thickness direction.Like this, because the curved intensity of frustrating of fiber itself is to the thickness direction effect, even therefore apply external pressure, volume also is not easy distortion.And in the middle of these, fiber is if helical rib, and shape restores to the original state when removing the external pressure that is applied, even nonwoven fabric receives the attenuation ground distortion a little of excessive external pressure thickness, remove external pressure after, also return to original thickness easily.
The surface crinkled fibre is to crispatura through machinery to pay that shape or core sheath structure utilize the core shift formula or the general name of the fiber of being crispaturaed in advance side by side etc.Potential crinkled fibre is the fiber that occurs crispaturaing through heating.
The machinery control crimped configuration such as the peripheral speed of the method speed that continuous straight line fiber can be through the mechanical flow direction after to spinning is poor, heat, pressurization of crispaturaing.The number of crispaturaing of the unit length of fiber is many more, can improve the outer curved intensity of depressing of frustrating more.For example, the number of crispaturaing of the unit length of fiber is 10 to 35/inch, is preferably in the scope of 15 to 30/inch.
The fiber that utilizes thermal contraction to crispatura for example is the fiber that is formed by two different resins of above fusing point.Such fiber carries out three-dimensional and crispaturas owing to the difference of the percent thermal shrinkage in when heating.Core shift formula that for example to be core sheath structure, core be provided with from the center displacement of section that the resin of hot rolling shrinkage fibers constitutes constitutes half-sum the opposing party's of the side on the section half the different block form of fusing point of resin.It is better that the percent thermal shrinkage of such fiber for example is preferably in 5 to 90%, 10 to 80% scope.
The measuring method of percent thermal shrinkage can be that (1) makes 200gsm (g/m with 100% measured fiber 2) fiber web, (2) make the test portion cut into 250 * 250mm size, place this test portion 5 minutes in the baking oven of 145 ℃ (418.15K) (3), the length of the test portion after the thermal contraction is measured in (4), (5) are according to the calculating of the length difference before and after thermal contraction percent thermal shrinkage.
And; As stated; Air-flow makes easily that fiber arranges again be the free degree between the fiber high, only through the net before the heat fusing that forms that interweaves; In order to form slot part backs such as (concavo-convexization) at many air-flows, to keep this shape ground to carry out the absorber processing, preferably use to make the gas of thermoplasticity fiber heat fusing wear method through baking oven processing (heat treated).Be fit to the fiber of this manufacturing approach owing to be that intersection point between the fiber carries out heat fusing, therefore preferably use the fiber of core sheath structure, parallel construction, and better be to utilize between the sheath really the fiber of the core sheath structure of heat fusing easily.Especially, preferably use the core sheath composite fibre of PETG and polyethylene formation or the core sheath composite fibre of polypropylene and polyethylene formation.These fibers can use or make up two or more uses separately.In addition, fibre length is 20 to 100mm, is preferably 35 to 65mm.
5-3. macromolecule absorber
As being mixed in the state of fiber assembly, and the macromolecule absorber that exists with the state that is arranged on slot part etc. for example is starch based, crosslinked CMC class, polyacrylic, gathers ethanol family macromolecule absorber.Wherein Sodium Polyacrylate is best.
5-4. the fluid that mainly forms by gas
The fluid that is mainly formed by gas of the present invention for example is to adjust to the atomic aerosol that contains solid or liquid in gas or this gas of normal temperature or set point of temperature.
Gas is air, nitrogen etc. for example.And gas contains the steam of liquid such as steam.
Aerosol is that liquid or solid is distributed to the material in the gas.For example be to be used for painted mill base; Or be used to improve the softeners such as silicon of flexibility; Or be used to prevent charged and the hydrophily of control wettability or the activating agent of water proofing property; Or be used to improve the titanium oxide of fluid energy; Inorganic fillers such as barium sulfate; Or in heat treated, improve the powder-stuck of the polyethylene etc. of concavo-convex shaping retentivity when improving the energy of fluid; Or the bagodryl hydrochloride of antipruritic usefulness; Antihistaminics such as thymol; Or NMF; Or bactericide etc. is through the material after disperseing.At this, solid comprises colloid.
Can suitably adjust mainly the temperature of the fluid that forms by gas.Fiber alignment, fiber density or the fiber weight per unit area of the absorber that can maybe need make according to the character of the fiber that constitutes fiber assembly, perhaps the slot part of regulation and the shape of peristome are suitably adjusted.
At this, suitably move in order to make the fiber that constitutes fiber assembly, the temperature of the fluid that is mainly formed by gas is if high temperature to a certain degree then constitutes the free degree increase of the fiber of fiber assembly, so is desirable.And; Fiber assembly contains under the situation of thermoplasticity fiber; The temperature that can form through making mainly the fluid that is formed by gas becomes the temperature that this thermoplasticity fiber can soften, the structure of underhardening again when making the thermoplasticity fiber softening that is arranged on the zone of having sprayed the main fluid that is formed by gas etc. or fusion.
The fluid that like this, is for example mainly formed by gas through injection keeps the shape of fiber alignment, fiber density or fiber weight per unit area etc. or slot part and peristome.And, for example pay when fiber assembly moves through the travel mechanism that stipulates, prevent the intensity of this fiber assembly (absorber) degree at random.
Can be according to the fiber alignment of being adjusted, fiber density or fiber weight per unit area, or suitably adjust mainly the flow of the fluid that forms by gas as the shape of the slot part of purpose or oral area.As the concrete example of the fiber assembly that has the free degree between the fiber, for example, sheath by high density polyethylene (HDPE) form, core forms by PETG; By fibre length is 20 to 100mm, and preferably 35 to 65mm, and fiber number is 1.1 to 8.8dtex; Be preferably 2.2 to 5.6dtex core sheath fiber and artificial silk formation,, open fibre with combing method if mix the rayon fiber of from same fibre length and fiber number, selecting; Then using fibre length is 20 to 100mm, and 35 to 65mm fiber preferably is if open fibre with the air lay method; Then using fibre length is 1 to 50mm, and preferably 3 to 20mm fiber adjusts to 10 to 1000g/m 2, preferably 15 to 100g/m 2Fiber web 100.Condition as the fluid that mainly forms by gas; For example; (ejection 913: diameter is 0.1 to 30mm, is preferably 0.5 to 5mm in the ejection portion 910 that forms a plurality of ejiction openings 913; Spacing is 0.5 to 30mm, is preferably 0.1 to 10mm; Just be shaped as circle, ellipse or rectangle), with air quantity be 3 to 50 [L/ (branch holes)], the condition that is preferably 5 to 20 [L/ (branch holes)] is 15 to 300 ℃ (288.15K to 573.15K), is preferably the hot blast of 100 to 200 ℃ (373.15K to 473.15K) to fiber web 100 injection temperations.For example, spray mainly with above-mentioned condition under the situation of the fluid that is formed by gas, the fiber assembly that the fiber that is constituted can change its position or direction is one of suitable fiber assembly of the present invention.Through with such fiber, under above-mentioned creating conditions, make, for example can form above-mentioned multi-layer nonwoven fabrics.Can constitute zone or the size or the fiber weight per unit area of convex shaped part 2 of the bottom of slot part 1 in following scope manufacturing.The thickness of slot part 1 is 0.05 to 10mm, is preferably in 0.1 to 5mm scope, and width is 0.1 to 30mm, is preferably in 0.5 to 5mm scope, and the fiber weight per unit area is 2 to 900g/m 2, be preferably in 10 to 90g/m 2Scope.The thickness of convex shaped part 2 is 0.1 to 15mm, is preferably in 0.5 to 10mm scope, and width is 0.5 to 30mm, is preferably in 1.0 to 10mm scope, and the fiber weight per unit area is 5 to 1000g/m 2, be preferably in 10 to 100g/m 2Scope.At this, can make absorber in the scope of above-mentioned numerical value substantially, but not receive the restriction of this scope.
5-5. manufacturing installation is related
5-5-1. gas permeability support unit
The gas permeability support unit be for example from the fluid that mainly forms of ejection portion 910 ejection by gas, see through the support unit that the fluid that is mainly formed by gas of fiber web 100 can be breathed freely to the opposition side that is provided with these fiber web 100 sides.
With regard to the breathable support unit netted support unit 210 is for example arranged as changing the flowing of fluid that mainly forms hardly by gas.This netted support unit 210 for example can be formed by the mesh members that inweaves the fine mesh that fine wire forms.And netted support unit 210 is netted gas permeability support units of the conduct stated after all the being provided with first ventilative portion.
And the gas permeability support unit can have ventilative portion and non-ventilative portion, and ventilative portion is the opposition side that is provided with fiber web 100 sides that the fluid that is mainly formed by gas that sprays from the upper face side of fiber web 100 can be on the gas permeability support unit, is that downside is breathed freely; Non-ventilative portion can not breathe freely to the downside of gas permeability support unit from the fluid that is mainly formed by gas of the upper face side injection of fiber web 100, and the fiber 101 of formation fiber web 100 can not move to the opposition side of gas permeability support unit.
As such gas permeability support unit for example be with the parts of non-ventilative portion be arranged on the pattern of regulation support unit on the mesh members of regulation, or the hole portion of many regulations be formed on the support unit on the plate-shaped member of non-gas permeability.
Non-ventilative portion for example is that the elongate parts 225 as non-gas permeability parts equally spaced are arranged side by side the support unit 220 on the one side of netted support unit 210 with the support unit that the pattern of regulation is arranged on the mesh members of this regulation.At this, can be with suitably changing as the parts of the shape of the elongate parts 225 of non-gas permeability parts or setting embodiment as other.Except elongate parts 225 being arranged on the one side of netted support unit 210, also can form non-ventilative portion through the netted mesh of filling out as ventilative portion (for example utilizing scolding tin, resin etc.).
Be formed on the parts on the plate-shaped member of non-gas permeability as hole portion, the tabular support unit 230 of the oval-shaped hole portion 233 that forms the ventilative portion of a plurality of conducts is for example arranged a plurality of regulations.At this, suitably adjusted shape, the size of hole portion 233 and the parts that are provided with and can be used as other embodiments.In other words, the parts of suitably having adjusted shape as the board 235 of non-ventilative portion etc. can be used as other embodiments.
At this, the ventilative portion on the gas permeability support unit has the first ventilative portion and the second ventilative portion, and in fact the fiber 101 of the formation fiber web 100 of the first ventilative portion can not move to the opposition side (downside) of placement fiber web 100 sides on the gas permeability support unit; The fiber of the above-mentioned fiber web aggregate of formation of the second ventilative portion can move to the above-mentioned opposition side on the above-mentioned gas permeability support unit.
The first ventilative portion for example is the netted zone on the netted support unit 210.And the second ventilative portion for example is the hole portion 233 on the tabular support unit 230.
Gas permeability support unit with first ventilative portion for example is netted support unit 210.Gas permeability support unit with non-ventilative portion and first ventilative portion for example is a support unit 220.Support unit with non-ventilative portion and second ventilative portion for example is tabular support unit 230.
In addition, for example be the gas permeability support unit that forms of the first ventilative portion and the second ventilative portion or have non-gas permeability support unit and the gas permeability support unit of the first ventilative portion and the second ventilative portion.Gas permeability support unit as the first ventilative portion and the formation of the second ventilative portion for example is the gas permeability supporting mass that on netted support unit 210, forms a plurality of openings.In addition, for example be the gas permeability support unit that forms a plurality of openings in the mesh-like area of support unit 220 as gas permeability support unit with non-gas permeability support unit and the first ventilative portion and second ventilative portion.
In addition, the gas permeability support unit for example is that a side of supporting fiber web 100 is general plane shape or roughly curved while, the support unit that this plane or curved surface is a general planar.The general plane shape or roughly the curved surface shape for example be tabular or cylindrical shape.And it is concavo-convex etc. that the general planar shape for example is meant that the face of the placement fiber web 100 on the support unit itself does not form.Net on the netted in this way support unit 210 of concrete example does not form the support unit of concave-convex etc.
This gas permeability support unit for example is tabular support unit or columnar support unit.Netted support unit 210, support unit 220 and tabular support unit 230 that concrete example is above-mentioned in this way or gas permeability idler pulley etc.
At this, the gas permeability support unit is arranged on the absorber manufacturing installation 90 removably.Like this, fiber alignment, fiber density or the fiber weight per unit area of corresponding needed absorber can be set suitably, or the gas permeability support unit of needed slot part or peristome.In other words, on non-woven cloth manufacturing device 90, the gas permeability support unit can be changed with other gas permeability support units of from a plurality of different gas permeability support units, selecting.And the present invention we can say and comprises the absorber manufacturing system with absorber manufacturing installation 90 and a plurality of different gas permeability support units.
Below describe with regard to the mesh portion on netted support unit 210 or the support unit 220.The mesh portion of this gas permeability for example is the silk that forms of metals such as the silk that forms with resins such as polyethylene polyphenylene sulfide nylon conductive monofilaments or stainless steel copper aluminium etc., the gas permeability net that inweaves through plain weave, twill, satin weave, double braid, spiral braiding etc.
The online air permeability of this gas permeability for example inweaves the thickness of method or line, the shape of line through partly changing, and can air permeability changed.Specifically be the gas permeability mesh of the spiral braiding of parallel silk that the gas permeability mesh that the spiral that polyester forms is knitted, stainless steel form and circular wire.
And, replace the elongate parts 225 on the one side that is arranged on support unit 220, also can design on the net and apply silicones etc., or partly engage non-poromeric material to gas permeability.The gas permeability of 20 meshes of the plain weave that for example, can form to polyester is on the net to the width elongation, apply silicones at the production line flow direction each other times without number.In this case, form the non-ventilative portion that silicones or non-poromeric material engage, other positions become the first ventilative portion.In non-ventilative portion, in order to improve the sliding on surface, its surface is preferably level and smooth.
Tabular support unit 230 for example is the sleeve that metal such as stainless steel copper aluminium is made.Sleeve for example is partly to penetrate above-mentioned metallic plate with the shape of stipulating.The position of getting through this metal becomes the second ventilative portion, and the position of not getting through this metal becomes non-ventilative portion.And same as described above, in non-ventilative portion, in order to improve surperficial sliding, its surface is preferably level and smooth.
Sleeve for example be length be 3mm, width be 40mm with each dihedral conglobate grow crosswise square; The hole portion that gets through this metal has the interval of 2mm at production line flow direction (moving direction), has the interval of 3mm at width; Being arranged to grid, is that thickness is the stainless sleeve of 0.3mm.
And, for example be that hole portion is arranged to staggered sleeve.For example, with diameter be the circle of 4mm, the hole portion that gets through metal to be arranged on production line flow direction (moving direction) be the staggered of 6mm spacing for the spacing of 12mm, at width, be that thickness is the stainless sleeve of 0.3mm.Like this, can be in time on sleeve, set the pattern got through (formed hole portion) or configuration.
And, for example be the gas permeability support unit that is provided with the fluctuating of regulation.For example, be that the position of the fluid that mainly do not formed by gas by direct injection has towards alternately the rise and fall gas permeability supporting mass of (for example waveform) of production line flow direction (moving direction).Through using the gas permeability support unit of this shape; Adjustment fiber alignment, fiber density or fiber weight per unit area; And in the time of the slot part of formation regulation or peristome, can obtain forming the absorber of the shape of alternately rise and fall (for example waveform) on the whole gas permeability support unit.
At this; Under the structure condition of different of gas permeability support unit; Even spray gases from ejection portion 910 with identical condition; Constitute fiber alignment, fiber density or the fiber weight per unit area of the fiber 101 of fiber web 100, or the shape of formed slot part or peristome or the also complete difference of size.In other words,, the absorber of needed fiber alignment, fiber density or fiber weight per unit area be can obtain adjusting to, or the slot part of needed shape or the absorber of peristome formed through suitably selecting the gas permeability support unit.
And; One of characteristic of the absorber manufacturing installation 90 of this embodiment is; Through spraying the fluid that mainly forms to fiber web 100 continuously by gas as fiber assembly from ejection mechanism; Can make and adjust fiber alignment, fiber density or fiber weight per unit area, or form the slot part of regulation or the absorber of peristome.
5-5-2. travel mechanism
Travel mechanism makes moving to prescribed direction as the fiber web of fiber assembly 100 under the state of a side bearing through above-mentioned gas permeability support unit.Specifically be that the fiber web 100 under the state that has sprayed mainly the fluid that is formed by gas is moved to prescribed direction F.Travel mechanism can be a conveyer 930 for example.Conveyer 930 has the gas permeability conveyer belt portion 939 and rotation section 931,933 of gas permeability, and gas permeability conveyer belt portion 939 forms the annular of growing crosswise of loading the gas permeability support unit; The inboard of the gas permeability conveyer belt portion 939 of the annular of growing crosswise in formation in rotation section 931,933 is arranged on the two ends of length direction, and this annular gas permeability conveyer belt portion 939 is rotated to prescribed direction.At this, the gas permeability support unit is under the situation of netted support unit 210 or support unit 220, and above-mentioned gas permeability conveyer belt portion 939 is not set sometimes.Gas permeability support unit such as tabular support unit 230 are to form under the situation of supporting mass of macropore, for the fiber that suppresses for example to constitute fiber web 100 falls from the hole, fall within the machinery that uses in the operation, and gas permeability conveyer belt portion 939 preferably is set.This gas permeability conveyer belt portion 939 preferably for example is netted conveyer belt portion.
As stated, conveyer 930 makes from the gas permeability support unit of the state of following side bearing fiber web 100 and moves to prescribed direction F.Specifically be, make fiber web 100 pass ejection portion 910 downside move.And, make fiber web 100 pass internally moving as the heater portion 950 of the two sides opening of heating arrangements.
And, travel mechanism's a plurality of conveyers for example capable of being combined.Through such formation; Can suitably adjust speed that moves near ejection portion 910 ground and the translational speed that moves away from ejection portion 910 ground; Like this, can adjust fiber alignment, fiber density or fiber weight per unit area on the absorber 115, or the shape of slot part or peristome etc.
And the absorber of being made by heater portion 950 heating 115 moves to the operation or the coiling operation that for example absorber 115 are cut into the shape of regulation through conveyer 930 with at the continuous conveyer 940 of prescribed direction F.Conveyer 940 is the same with conveyer 930, has conveyer belt portion 949 and rotation section 941 etc.
5-5-3. injection equipment
Injection equipment has no illustrated air feed part and ejection portion 910.Not having illustrated air feed part is connected with ejection portion 910 through snorkel 920.Snorkel 920 can be connected with the upside of ejection portion 910 ventilatively.Interval with regulation in ejection portion 910 forms a plurality of ejiction openings 913.
Do not spray from a plurality of ejiction openings 913 that are formed in the ejection portion 910 to the gas that ejection portion 910 carries through snorkel 920 from there being illustrated air feed part.From the gas of a plurality of ejiction openings 913 ejections to by the upper face side continuous injection of gas permeability support unit from the fiber web 100 of following side bearing.Specifically be, from the gas of a plurality of ejiction openings 913 ejections to the upper face side continuous injection that is transferred the fiber web 100 of machine 930 under the state that prescribed direction F moves.
The gases etc. that 915 pairs of the suction unit of downside that below ejection portion 910, are arranged on the gas permeability support unit see through the gas permeability support unit from 910 ejections of ejection portion, again carry out air-breathing.At this, air-breathing through this suction unit 915 can make fiber web 100 location, is attached on the gas permeability support unit.And, can under the state of the slot part shapes such as (concavo-convex) that further keeps being shaped, be transported in the heater portion 950 through air-breathing through air flow.At this moment, preferably when air flow forms, up to all air-breathing one side conveyings of one side of heater portion 950.
For example, the upper face side that the main fluid that is formed by gas that sprays through the ejiction opening 913 that forms with predetermined distance from the width at fiber web 100 is manufactured on fiber web 100 has formed the absorber 110 of slot part 1 with predetermined distance.
As ejection portion 910, for example the diameter of ejiction opening 913 is 0.1 to 30mm for example, is preferably 0.3 to 10mm, and the spacing between the ejiction opening 913 is 0.5 to 20mm, is preferably 3 to 10mm.
The shape of ejiction opening 913 for example is just circle, ellipse, square or rectangular etc., but is not limited to this.And the section shape of ejiction opening 913 for example is a cylindrical shape, trapezoidal, trapezoidal, but is not limited to this.To fiber web 100 injection airs, the preferably positive circle of shape, section shape are preferably cylindrical shape for expeditiously.
Can be according to the needed fiber alignment of absorber, fiber density or fiber weight per unit area, or the slot part of regulation or peristome design this ejiction opening 913 etc.And each aperture or the shape of a plurality of ejiction openings 913 also can have nothing in common with each other, and, also can form multiple row ejiction opening 913 in ejection portion 910.
From the temperature of the fluid that is mainly formed by gas of each ejiction opening 913 ejections can be normal temperature as described above; But good for the formability that makes slot part (concavo-convex) or peristome, the softening point of preferably adjusting to the fiber of thermoplasticity at least that constitutes fiber assembly is above, the temperature below above and fusing point+50 of softening point ℃ preferably.Fiber is in case softening, and then the bounce of fiber itself reduces, and the shape that keeps air flow etc. that fiber is arranged again easily in case further elevated temperature then begins heat fusing between the fiber, therefore keeps the shape of slot part (concavo-convex) etc. more easily.Like this, under the state of the shape that keeps slot part (concavo-convex) etc., be transported to easily in the heater portion 950.
And; In order under the state of the shape that keeps the slot part (concavo-convex) etc. through shapings such as air flows, to be transported to heater portion 950; Can be after the shaping that waits through shaping slot part (concavo-convex) such as air flow immediately or conveying in heater portion 950 simultaneously; Cool off through cold wind etc. immediately after the slot part shapings such as (concavo-convex) that perhaps forms through hot blast (air flow of set point of temperature), be transported to heater portion 950 afterwards.
At this; Except the structure of above-mentioned gas permeability support unit; As making fiber 101 on the fiber web 100 move, adjust the key element of shape or size etc. of fiber alignment, fiber density or fiber weight per unit area or the formed slot part or the peristome of fiber 101, for example have from the flow velocity of the gas of ejection portion 910 ejections or flow etc.Gas pushing quantity that can be through there not being illustrated air feed part etc. or be formed on the quantity of the ejiction opening 913 in the ejection portion 910 or the flow velocity or the flow of the gas that the bore adjustment is sprayed.
In addition, the direction of the fluid that forms by gas can be changed mainly, the interval of for example formed slot part 1 (slot part) on concavo-convex or the height of convex shaped part etc. can be suitably adjusted through making ejection portion 910.And, the formation of the direction through forming above-mentioned fluid capable of automatic changing, for example can suitably adjust slot part etc. becomes the shape that crawls (waveform, in a zigzag) or other shapes.And,, can suitably adjust the shape or the formation pattern of slot part or peristome through adjusting mainly the spray volume or the ejection time of the fluid that forms by gas.The spray angle of the relative fiber web 100 of fluid that is mainly formed by gas can be vertical; And; On the moving direction F of fiber web 100; The angle that can stipulate is towards the production line flow direction as this moving direction F, and the angle that also can stipulate is towards the opposite direction of production line flow direction.
5-5-4. heating arrangements
Heater portion 950 as heating arrangements sees it is both ends open from prescribed direction F.Like this, being loaded in the fiber web 100 (multi-layer nonwoven fabrics 110) that utilizes on the gas permeability support unit that conveyer 930 moves is transported to and is formed on the inner heating space of heater portion 950, is transported to the outside after being detained official hour.And; The fiber 101 that constitutes fiber web 100 (multi-layer nonwoven fabrics 110) contains under the situation of thermoplasticity fiber, through the heating of this heater portion 950, fibers melt; Cool off through being transported to the outside, can obtain the multi-layer nonwoven fabrics after mutual intersection point fusion between the fiber.
As bonding adjusted fiber alignment, fiber density or fiber weight per unit area with and/or formed the method for the fiber 101,102 on one or more the multi-layer nonwoven fabrics 110 in slot part, peristome or the jut of regulation, the heat bonding that for example has bonding or some Method for bonding that needle point method, jet net-spraying method, solvent welding method carry out or the gas method of wearing to carry out.And for mutual bondable fibers under the state of the shape that keeps adjusted fiber alignment, fiber density or fiber weight per unit area or formed slot part, peristome or jut, preferably gas is worn method.And, the heat treatment of preferably for example carrying out with the gas method of wearing of heater portion 950.

Claims (15)

1. an absorber contains hygroscopicity fibre, it is characterized in that, has a plurality of low fiber weight per unit area zones and a plurality of high fiber weight per unit areas zone,
Said low fiber weight per unit area zone forms along first direction continuously, and the fiber weight per unit area is lower than the average fiber weight per unit area of this absorber,
Said high fiber weight per unit area zone with the second direction of said first direction quadrature on be formed on the both sides in said low fiber weight per unit area zone; Form along this low fiber weight per unit area zone, and the fiber weight per unit area is higher than said average fiber weight per unit area;
In said low fiber weight per unit area zone, formation comprises any one the fiber small number of regions at least in a plurality of depressed parts, a plurality of peristome;
The containing ratio of contained vertical directional fiber is higher than the containing ratio of horizontal directional fiber in the fiber in this high fiber weight per unit area zone of said a plurality of high fiber weight per unit area zones formation separately,
The containing ratio of contained said horizontal directional fiber is higher than the containing ratio of said vertical directional fiber in the fiber in this low fiber weight per unit area zone of said a plurality of low fiber weight per unit area zones formation separately;
As the regional thickness in side of the regional both sides zone, that be arranged on said fiber small number of regions, side of said high fiber weight per unit area, the thin thickness in the zone more regional than the non-said side in the said high fiber weight per unit area zone.
2. absorber as claimed in claim 1; It is characterized in that all or part of of said a plurality of high fiber weight per unit areas zone is outstanding and as the thickness of the length on the said thickness direction convex shaped part thicker than the average thickness of this absorber to the thickness direction of this absorber;
All or part of of said a plurality of low fiber weight per unit areas zone is to be to the shape of said thickness direction depression and the slot part of thin thickness.
3. according to claim 1 or claim 2 absorber is characterized in that also having the macromolecule absorber.
4. absorber as claimed in claim 3 is characterized in that, said macromolecule absorber bias configuration is in the opposing face side of the face that is formed with said low fiber weight per unit area zone and said high fiber weight per unit area zone.
5. absorber as claimed in claim 3 is characterized in that, said macromolecule absorber is configured in said low fiber weight per unit area zone.
6. absorber; It is characterized in that; Lamination disposes as first absorber of each described absorber in the claim 1 to 5 with as second absorber of each described absorber in the claim 3 to 5, makes that mutual to be formed with the regional face of said low fiber weight per unit area zone and said high fiber weight per unit area relative.
7. a multilayer absorber has the absorber that first fibrage and lamination are configured in the said first fibrolaminar one side side and have hygroscopicity fibre, it is characterized in that,
Be formed with a plurality of slot parts and a plurality of convex shaped part; Said a plurality of slot part sees that from the said first fibrolaminar another side shape ground that is in the thickness direction of this multilayer absorber depression forms along first direction; Said a plurality of convex shaped part is to the outstanding shape of said thickness direction; Form in abutting connection with ground with said a plurality of slot parts from seeing respectively, and its fiber weight per unit area is higher than the zone of the bottom that constitutes said slot part with the second direction of said first direction quadrature;
See from said thickness direction, constitute said a plurality of slot parts the bottom the zone and said a plurality of convex shaped part respectively lamination dispose said first fibrage and said absorber;
The shape that constitutes the said absorber of said a plurality of convex shaped parts is that the same side that faces a side of giving prominence to the said first fibrolaminar said another side of the said first fibrage side of this absorber is outstanding.
8. multilayer absorber as claimed in claim 7 is characterized in that, the containing ratio of the vertical directional fiber of the fiber of said a plurality of convex shaped parts this convex shaped part of formation separately is higher than the containing ratio of horizontal directional fiber;
The containing ratio of the said horizontal directional fiber of the fiber of said a plurality of slot part these a plurality of slot parts of formation separately is higher than the containing ratio of said vertical directional fiber.
9. like claim 7 or 8 described multilayer absorbers; It is characterized in that; Zone in the bottom that constitutes said a plurality of slot parts, the direction in the extension of this slot part is formed with any one the fiber small number of regions at least that comprises a plurality of depressed parts, a plurality of peristomes with predetermined distance respectively;
All or part of of side wall portion of periphery that constitutes said fiber small number of regions is by constituting the said first fibrolaminar fiber-covered.
10. like claim 7 or 8 described multilayer absorbers, it is characterized in that also having second fibrage on the face of the said first fibrage opposition side that is configured in said absorber.
11. multilayer absorber as claimed in claim 10 is characterized in that, said first fibrage and said second fibrage form through the combing method lamination;
Said absorber forms the fiber lamination that constitutes this absorber through utilizing the air lay method on the face of said first fibrolaminar side's side.
12. absorbent commodity; Has the liquid non-permeable film that first fibrage, lamination are configured in the said first fibrolaminar one side side and comprise the absorber of hygroscopicity fibre and be configured in the said first fibrage opposition side of said absorber; It is characterized in that
Be formed with a plurality of slot parts and a plurality of convex shaped part; Said a plurality of slot part is seen to be in the shape of the thickness direction of this multilayer absorber depression and along first direction from the said first fibrolaminar another side and is formed; Said a plurality of convex shaped part is to the outstanding shape of said thickness direction; Abut to form with said a plurality of slot parts from seeing respectively, and its fiber weight per unit area is higher than the zone of the bottom that constitutes said slot part with the second direction of said first direction quadrature;
Said a plurality of slot part and said a plurality of convex shaped part are formed by said first fibrage and said absorber;
The shape that constitutes the said absorber of said a plurality of convex shaped parts is that the same side that faces a side of giving prominence to the said first fibrolaminar said another side of the said first fibrage side of this absorber is outstanding.
13. absorbent commodity as claimed in claim 12 is characterized in that, the containing ratio of the vertical directional fiber of the fiber of said a plurality of convex shaped parts this convex shaped part of formation separately is higher than the containing ratio of horizontal directional fiber;
The containing ratio of the said horizontal directional fiber of the fiber of said a plurality of slot part these a plurality of slot parts of formation separately is higher than the containing ratio of said vertical directional fiber.
14. like claim 12 or 13 described absorbent commodities, it is characterized in that,, be formed with any one the fiber small number of regions at least that comprises a plurality of depressed parts, a plurality of peristomes with predetermined distance respectively at said a plurality of slot parts;
All or part of of side wall portion that constitutes said fiber small number of regions periphery is by constituting the said first fibrolaminar fiber-covered.
15., it is characterized in that also having second fibrage that is arranged between said absorber and the said liquid non-permeable film like claim 12 or 13 described absorbent commodities.
CN2007800183424A 2006-06-23 2007-06-06 Absorbent, multilayered absorbent, and absorbent article Expired - Fee Related CN101448992B (en)

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JP2006174505 2006-06-23
JP174505/2006 2006-06-23
JP270112/2006 2006-09-29
JP2006270112A JP5123513B2 (en) 2006-06-23 2006-09-29 Absorber
PCT/JP2007/061445 WO2007148534A1 (en) 2006-06-23 2007-06-06 Absorbent, multilayered absorbent, and absorbent article

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CN2007800172364A Expired - Fee Related CN101542032B (en) 2006-06-23 2007-05-23 Non-woven fabric
CN2007800182563A Active CN101448991B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800173348A Expired - Fee Related CN101443502B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800183424A Expired - Fee Related CN101448992B (en) 2006-06-23 2007-06-06 Absorbent, multilayered absorbent, and absorbent article
CN2007800172082A Expired - Fee Related CN101443500B (en) 2006-06-23 2007-06-06 Multilayer nonwoven fabric and process for producing the same
CN2007800182686A Active CN101448989B (en) 2006-06-23 2007-06-08 Nonwoven fabric
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CN2007800172364A Expired - Fee Related CN101542032B (en) 2006-06-23 2007-05-23 Non-woven fabric
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CN101473081B (en) 2011-08-24
CN101443502B (en) 2011-12-07
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CN101443501B (en) 2011-05-18
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CN101542032A (en) 2009-09-23
CN101448991B (en) 2011-05-25
CN101542032B (en) 2011-08-24
CN101448990B (en) 2011-12-07
CN101443499A (en) 2009-05-27
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CN101443501A (en) 2009-05-27
CN101448991A (en) 2009-06-03
TWI349051B (en) 2011-09-21

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