CN101448990B - Nonwoven fabric - Google Patents

Abstract

The present invention provides a nonwoven fabric that inhibits easy breakage during use thereof. Against fiber web (100) supported from its bottom face side by given support member (220), a fluid composed mainly of a gas is blown from the upper face side of the fiber web (100) so as to move fibers (101) constituting the fiber web (100), thereby forming at least multiple apertural areas (3). In nonwoven fabric (170), there are provided multiple apertural areas (3) continuously formed at given intervals along given direction and multiple coupling parts (4) formed between apertural areas (3) adjacent to each other in given direction.

Description

Bondedfibre fabric

Technical field

The present invention relates to bondedfibre fabric.

Background technology

In the past, bondedfibre fabric is used for extensive fields such as medical supplies such as cleaning implements such as amenitiess such as paper nappy or sanitary napkin, wiper, mouth mask.Like this, bondedfibre fabric uses in various different fields, but under the situation of the goods that are actually used in every field, is necessary to make with the character of the purposes that is suitable for various goods or the mode of structure.

Bondedfibre fabric for example, forms fibrages (fiber web) by utilizing dry process or damp process etc., utilizes chemical adhesion method or heat viscosity method etc. will form fibrolaminar fiber and is bonded to each other and forms.In will forming fibrolaminar fiber technology combined, also exist and comprise method that a plurality of pins are thrust this fibrolaminar method or jet water course repeatedly etc. applies the power of physics to fibrage from the outside method.

But these methods just are interweaved fiber eventually, do not adjust the orientation or the configuration of the fiber in the fibrage, perhaps fibrolaminar shape etc.That is the bondedfibre fabric that utilizes these methods to make, nothing but simple sheet.

In addition, also proposed to be provided with the scheme of the bondedfibre fabric of opening.Described scheme has disclosed in order to form opening on bondedfibre fabric, bondedfibre fabric is clipped in the pressing mold of the projection that is equipped with laterally outstanding pin etc. and accepts between the supporting mass of accepting side of this projection, by making jut connect (for example, with reference to the patent documentations 1) such as methods of three-dimensional ground of bondedfibre fabric opening.

Patent documentation 1: the spy opens flat 6-330443 communique

Summary of the invention

For example, will be object, be provided with under the situation of bondedfibre fabric as the surface patch use of absorbent commodity of peristome that preferably, the diameter of opening is big with full-bodied liquid, and then, in order to improve aperture opening ratio, dwindle the connecting portion between opening and the opening.But, because patent documentation 1 described bondedfibre fabric, bite into jut and accept between the supporting mass of side by the fiber assembly that will constitute bondedfibre fabric, form concavo-convex or opening, so, density around the density at the connecting portion place between the opening and the opening much at one, in addition, fiber orientation is also mainly concentrated towards length direction.Like this, particularly have under the situation of narrow opening, wearing in the process of the absorbent commodity that this bondedfibre fabric is used as surface patch, when when width applies frictional force in the connecting portion alignment arrangements, the fiber that exists connecting portion unclamps easily, the problem of situation that can be damaged.

The purpose of this invention is to provide a kind of bondedfibre fabric, in being formed with the bondedfibre fabric of opening, in the use of this bondedfibre fabric, be not easy breakage.

Solve the scheme of problem

Discoveries such as the inventor, by from upper face side to the aeration supporting member that utilizes regulation gas jet from the fiber web of following side bearing, this fibroreticulate fiber of formation is moved, can form opening or concavo-convex at least, thereby finish the present invention.

(1) a kind of bondedfibre fabric, it is bondedfibre fabric with first direction and second direction, this bondedfibre fabric comprises: along a plurality of peristomes of aforementioned first direction formation, and be formed on the peristome of the regulation in aforementioned a plurality of peristome and a plurality of connecting portions between peristome adjacent on the aforementioned first direction, in in aforementioned a plurality of connecting portion each, the containing ratio of the second direction orientation fibers that is orientated on aforementioned second direction is than the containing ratio height of the first direction orientation fibers that is orientated on aforementioned first direction, simultaneously, in the fibre density at aforementioned connecting portion place than each fibre density height along a plurality of neighboring areas in the zone that forms aforementioned a plurality of peristomes and aforementioned a plurality of connecting portions.

(2) bondedfibre fabric described in (1) as described above, the length ratio of each of aforementioned connecting portion on length on the aforementioned second direction and aforementioned first direction is below 0.7.

(3) as described above (1) or (2) described in bondedfibre fabric, each of aforementioned peristome, at each the fiber of peripheral region of this peristome along each periphery orientation of this peristome.

(4) as described above (1) in (3) any one described bondedfibre fabric, each of aforementioned peristome is circular or ellipse roughly roughly.

(5) as described above (1) in (4) any one described bondedfibre fabric, each of aforementioned peristome is in the ratio less than 1 of the diameter on the aforementioned first direction with diameter on aforementioned second direction.

(6) as (1) in (5) any one described bondedfibre fabric, the length of each of aforementioned peristome on aforementioned second direction is 4 to 30mm.

(7) as (1) in (6) any one described bondedfibre fabric, form the zone of aforementioned a plurality of peristome and a plurality of connecting portions, first side at this bondedfibre fabric is formed in a plurality of slot parts that thickness direction is recessed on, and described bondedfibre fabric also have with along the mode adjacency of aforementioned a plurality of slot parts, at aforementioned first side outstanding a plurality of convex shaped parts on thickness direction.

(8) bondedfibre fabric described in (7), each of aforementioned slot part is at the height of the thickness direction of this bondedfibre fabric each below 90% of aforementioned height at aforementioned convex shaped part.

(9) as (7) or (8) described in bondedfibre fabric, the convex shaped part that the convex shaped part of the regulation in aforementioned a plurality of convex shaped parts is adjacent with the slot part of regulation in aforementioned a plurality of slot parts is compared aforementioned height difference.

(10) as (7) in (9) any one described bondedfibre fabric, the top of each of aforementioned convex shaped part is flat roughly.

(11) as (7) in (10) any one described bondedfibre fabric, as second side this bondedfibre fabric and face aforementioned first opposition side, form to the outstanding a plurality of outburst areas of the projected direction opposition side of aforementioned convex shaped part.

(12) as (7) in (11) any one described bondedfibre fabric, on aforementioned first direction, be wavy fluctuating.

(13) as (1) in (10) any one described bondedfibre fabric, aforementioned second side in this bondedfibre fabric is general planar.

(14) as (7) in (13) any one described bondedfibre fabric, the containing ratio of the aforementioned first direction orientation fibers of the sidepiece of aforementioned a plurality of convex shaped parts is than the containing ratio height of aforementioned second direction orientation fibers.

(15) as (7) in (14) any one described bondedfibre fabric, the spatial area rate that the spatial area rate of measuring from aforementioned first side of each of aforementioned a plurality of convex shaped parts is measured than aforementioned second side from this bondedfibre fabric is big.

(16) as (1) in (15) any one described bondedfibre fabric, the fibre density in each of aforementioned connecting portion is at 0.05g/cm ³More than.

(17) as (1) in (16) any one described bondedfibre fabric, the mixed with fibers that constitutes this bondedfibre fabric has the fiber of hydrophobicity.

The effect of invention

The present invention can provide a kind of and has opening, in use be not easy damaged bondedfibre fabric.

Description of drawings

Figure 1A is the plane of the bondedfibre fabric of first kind of form of implementation.

Figure 1B is the ground plan of the bondedfibre fabric of first kind of form of implementation.

Fig. 2 is the enlarged perspective of the regional X among Fig. 1.

Fig. 3 A is the plane that the elongate member equally spaced is configured in side by side the supporting member on the netted supporting member.

Fig. 3 B is the perspective view that the elongate member equally spaced is configured in side by side the supporting member on the netted supporting member.

Fig. 4 is illustrated in fiber web by under the state of side below the supporting members supports of Fig. 3, upward the diagram of the state of the bondedfibre fabric of first kind of form of implementation of side gas jet, shop drawings 1.

Fig. 5 is the amplification front elevation of other supporting member that can make the bondedfibre fabric of first kind of form of implementation.

Fig. 6 is the side view of manufacturing installation of the bondedfibre fabric of first kind of form of implementation of explanation.

Fig. 7 is the plane of manufacturing installation of the bondedfibre fabric of key diagram 6.

Fig. 8 is the enlarged perspective of the regional Z among Fig. 6.

Fig. 9 is the ground plan of the ejection portion among Fig. 8.

Figure 10 is the perspective section view of the bondedfibre fabric of second kind of form of implementation.

Figure 11 is the perspective section view of the bondedfibre fabric of the third form of implementation.

Figure 12 is the enlarged perspective of the supporting member of the third form of implementation.

Figure 13 is the perspective section view of the bondedfibre fabric of the 4th kind of form of implementation.

Figure 14 is used for perspective view under the situation of surface patch of sanitary napkin with bondedfibre fabric according to the present invention.

Figure 15 is used for perspective view under the situation of surface patch of diaper with bondedfibre fabric according to the present invention.

Figure 16 is as the perspective view under the situation of the intermediate use of absorbent commodity with bondedfibre fabric according to the present invention.

Figure 17 is as the perspective view under the situation of the outside back side (the ア ウ タ-バ Star Network) use of absorbent commodity with bondedfibre fabric according to the present invention.

The specific embodiment

Below, be used to implement optimised form of the present invention with reference to description of drawings.

Figure 1A and Figure 1B are the plane and the ground plans of the bondedfibre fabric of first kind of form of implementation.Fig. 2 is the enlarged perspective of the regional X among Fig. 1.Fig. 3 A and Fig. 3 B are plane and the perspective views that the elongate member equally spaced is configured in side by side the supporting member on the netted supporting member.Fig. 4 is illustrated in fiber web by the diagram of the state of the bondedfibre fabric of first kind of form of implementation of side gas jet, shop drawings 1 upward under the state of side below the supporting members supports of Fig. 3.Fig. 5 is other the amplification front elevation of supporting member that can make the bondedfibre fabric of first kind of form of implementation.Fig. 6 is the side view of manufacturing installation of the bondedfibre fabric of first kind of form of implementation of explanation.Fig. 7 is the plane of manufacturing installation of the bondedfibre fabric of key diagram 6.Fig. 8 is the enlarged perspective of the regional Z among Fig. 6.Fig. 9 is the ground plan of the ejection portion among Fig. 8.

Figure 10 is the perspective section view of the bondedfibre fabric of second kind of form of implementation.Figure 11 is the perspective section view of the bondedfibre fabric of the third form of implementation.Figure 12 is the enlarged perspective of the supporting member of the third form of implementation.Figure 13 is the enlarged perspective of the bondedfibre fabric of the 4th kind of form of implementation.Figure 14 is used for perspective view under the situation of surface patch of sanitary napkin with bondedfibre fabric according to the present invention.

Figure 15 is used for perspective view under the situation of surface patch of diaper with bondedfibre fabric according to the present invention.Figure 16 is as the perspective view under the situation of the intermediate use of absorbent commodity with bondedfibre fabric according to the present invention.Figure 17 is as the perspective view under the situation of the outside back side use of absorbent commodity with bondedfibre fabric according to the present invention.

Bondedfibre fabric of the present invention be by at the aeration supporting member that utilizes regulation from the formation of a side bearing roughly on the fiber assembly, fiber assembly under the state that the fiber that promptly constituting this fiber assembly has the free degree of sheet, spray the fluid that mainly constitutes, formed the bondedfibre fabric of the peristome of regulation at least by gas.

[first kind of form of implementation]

Below, utilize Figure 1A, Figure 1B, Fig. 2, Fig. 4 that first kind of form of implementation of bondedfibre fabric of the present invention is described.

[1.1] shape

As Figure 1A, Figure 1B, shown in Figure 2, the bondedfibre fabric 180 of this form of implementation is formed with a plurality of slot parts 1 along first direction (below be also referred to as length direction) with about equally spacing parallel arranging ground in the one side side of this bondedfibre fabric 180.On this slot part 1 of bondedfibre fabric, alternately be formed with peristome 3 and connecting portion 4 with about equally interval.Each of these a plurality of peristomes 3 forms circular or substantially elliptical.Here, in this form of implementation, slot part 1 forms with spacing parallel arranging ground about equally, still, is not limited thereto, and difference also can be distinguished in adjacent slot part 1 interval each other.In addition, also can so that the mode of slot part 1 interval variation each other form.

In addition, between each of a plurality of slot parts 1 that form with about equally interval, be formed with a plurality of convex shaped parts 2 respectively.This convex shaped part 2 is the same with slot part 1, with spacing parallel arranging ground formation about equally.Height (thickness direction) approximate equality at the convex shaped part 2 of the bondedfibre fabric 180 of this form of implementation still, also can form according to the different mode of height that makes the convex shaped part 2 that adjoins each other.For example, the height of convex shaped part 2 can be adjusted in the interval of the described ejiction opening 913 in back by adjusting the fluid that ejection mainly forms by gas.For example,, can reduce the height of convex shaped part 2 by dwindling the interval of ejiction opening 913, otherwise, by enlarging the interval of ejiction opening 913, can improve the height of convex shaped part 2.And then, form the interval of ejiction opening 913 by the mode that replaces with narrow interval and wide interval, can alternately form highly different convex shaped part 2.In addition, like this, if the height of convex shaped part 2 is partly changed, owing to the area with contact skin reduces, so have the advantage that can alleviate the burden that gives skin.

In addition, convex shaped part 2 is at the height of the thickness direction of this bondedfibre fabric 180, to form than slot part 1 high mode.Can list the height of convex shaped part 2 on the thickness direction of bondedfibre fabric 180 and be 0.3 to 15mm, be preferably 0.5 to 5mm.In addition, can list the length of convex shaped part 2 on width and be 0.5, be preferably 1.0 to 10mm to 30mm.In addition, can list convex shaped part 2 distance each other across slot part 1 adjacency and be 0.5, be preferably 3 to 10mm to 30mm.

In addition, the height of slot part 1 on the thickness direction of bondedfibre fabric 180 forms in the mode that is lower than convex shaped part 2.Specifically, can list the height of slot part 1 on the thickness direction of bondedfibre fabric 180 and be convex shaped part 2, be preferably 1% to 50%, more preferably 0% to 20% height at below 90% of the height on the thickness direction.The length of slot part 1 on width for example is 0.1 to 30mm, is preferably 0.5 to 10mm.Can list across convex shaped part 2 adjacent slot part 1 distances each other is 0.5 to 20mm, is preferably 3 to 10mm.Here, the height on the so-called thickness direction is that 0% this zone of expression is a peristome 3.

By such design, for example, use at surface patch under the situation of this bondedfibre fabric 180 as absorbent commodity, when the liquid that can be formed on a large amount of regulations is drained, be suitable for the slot part 1 that is difficult to expand from the teeth outwards on a large scale.In addition, even becoming when applying undue external pressure convex shaped part 2 collapses under the routed state, also be easy to keep the space that forms by slot part 1, even, also be difficult to expand from the teeth outwards on a large scale applying under the situation that the liquid stipulated under the state of external pressure drained.And then, even under the situation that the liquid of the regulation that once is absorbed absorptions such as body externally returns under the pressure, because concavo-convex, reduced the contact area with skin, on a large scale so be difficult to be attached on the skin once more by on the surface of this bondedfibre fabric 180, being formed with.

Here, the assay method of the height of slot part 1 or convex shaped part 2 or pitch, width is as described below.For example, to workbench, utilize microscope to measure bondedfibre fabric 180 mounting under non-pressurized state by the cross-section photograph or the cross section map of bondedfibre fabric 180.

When measuring height (length on the thickness direction), will be from the position (that is the surface of workbench) of the foot of bondedfibre fabric 180 to towards the extreme higher position separately of the convex shaped part 2 of top and slot part 1 as highly measuring.

In addition, as the pitch of convex shaped part 2, measure the center distance each other of the convex shaped part 2 that adjoins each other.Similarly, as the pitch of slot part 1, measure the center distance each other of the slot part 1 that adjoins each other.

When measuring the width of convex shaped part 2, measure Breadth Maximum from its lowermost position (that is, the surface of workbench) of bondedfibre fabric 180 towards the bottom surface of the convex shaped part 2 of top, also measure slot part 1 in the same way.

Here, the cross sectional shape for convex shaped part 2 does not have specific restriction.For example, can list dome-shaped, trapezoidal, triangle, Ω shape, quadrangle etc.Good for the sense of touch that makes skin, near the end face of convex shaped part 2 and side is preferably curved surface.In addition,, also can keep the space that forms by slot part 1 even for convex shaped part 2 under the pressure externally collapses under the routed situation, preferably, from the bottom surface of convex shaped part 2 to end face, narrowed width.The end face of convex shaped part 2 is preferably the curve (curved surface) that is roughly dome-shaped etc.

In addition, shown in Figure 1A, Figure 1B, the bondedfibre fabric 180 of this form of implementation is the bondedfibre fabric that is formed with a plurality of peristomes 3 along slot part 1.And, between each of described a plurality of peristomes 3, form connecting portion 4, will be connected with each other with the convex shaped part 2 of this slot part 1 adjacency.In other words, a plurality of connecting portions 4 that form with the interval of regulation with convex shaped part 2 and with it the convex shaped part 2 of adjacency couple together.

In this form of implementation, peristome 3 forms with interval about equally, and still, the present invention is not limited thereto, also can separate different intervals and form.

As peristome 3 each the length of length direction and the length of width, for example can be 4 to 30mm, be preferably 5 to 10mm.

In addition, can list peristome 3 each the length of length direction and the ratio less than 1.0 of the length of width.

Equate with the height of convex shaped part 2 on the thickness direction of bondedfibre fabric 180 or, be preferably 20% to 100% at the height of the thickness direction of the bondedfibre fabric 180 at connecting portion 4 places, more preferably 40% to 70% less than this height.

In addition, each of connecting portion 4 in the longitudinal direction length and the ratio of the length on the width preferably below 0.7.Under the situation below 0.7, the fibre density of this connecting portion 4 forms than the fibre density height of convex shaped part 2 in this ratio.Under greater than 0.7 situation, the fibre density of this connecting portion 4 forms lowlyer than the fibre density of convex shaped part 2.

Here, the length direction of so-called connecting portion 4 refers to along the direction of slot part 1 or convex shaped part 2 bearing of trends, and in addition, the width of so-called connecting portion 4 refers to the roughly direction of quadrature of the direction of extending with respect to slot part 1 or convex shaped part 2.In other words, the width of connecting portion 4 is width of slot part 1, perhaps becomes the width of peristome 3.Thereby, we can say that also the length of the width of so-called connecting portion 4 is the length of the width of slot part 1, and, be the length of the width of peristome 3.

Specifically, the length of the width of connecting portion 4 for example can be 4 to 30mm, is preferably 5 to 10mm.

In addition, the cross sectional shape of connecting portion 4 on the length direction of this bondedfibre fabric is dimetric shape roughly.In addition, the cross sectional shape of the length direction of connecting portion 4 is not limited to quadrangle, also can be domeshape, trapezoidal, triangle, Ω shape etc., does not have specific restriction.Expansion for the liquid of the regulation that is suppressed at slot part 1 place is preferably quadrangle roughly.In addition, can not give foreign body sensation for connecting portion 4 under the external pressure of surplus contacts with skin etc., the end face of this connecting portion 4 is preferably plane or curved surface.

[1.2] fiber orientation

As Figure 1A, Figure 1B or shown in Figure 2, this bondedfibre fabric 180 by the injected zone of fluid that mainly is made of gas, forms the different respectively zone of containing ratio of the first direction orientation fibers that contains along first direction (longitudinal direction of the regulation in the bondedfibre fabric) orientation (below be also referred to as machine-direction oriented fiber) along fiber 101.Each different zone for example can list convex shaped part 2 and connecting portion 4 etc.

Here, so-called fiber 101 is gone up orientation at length direction (longitudinal direction), refer to fiber 101 with respect to as first direction, be the orientation of longitudinal direction in of the regulation of the direction (MD direction) bondedfibre fabric or fiber web sent via the machinery of making bondedfibre fabric here from-45 degree to the scopes of+45 degree, in addition, the fiber that will be orientated on first direction is called machine-direction oriented fiber.In addition, the orientation of fiber 101 on second direction (horizontal direction of the regulation of bondedfibre fabric), refer to fiber 101 with respect to as second direction, here for the width of the regulation of the bondedfibre fabric of the direction (CD direction) of the MD direction quadrature orientation in from-45 degree to the scopes of+45 degree, in addition, the fiber that will be orientated on width is called the horizontal orientation fiber.

For convex shaped part 2, preferably, machine-direction oriented fiber and horizontal orientation fiber moderately mix.Convex shaped part 2 is in the part that is connected with peristome 3, and the mode higher than the containing ratio of horizontal orientation fiber with the containing ratio of machine-direction oriented fiber forms.

In addition, in convex shaped part 2 in the face of a side of supporting member 240, as Figure 1B, shown in Figure 2, with the zone of connecting portion 4 adjacency, partly form in the containing ratio of horizontal orientation fiber the high mode of containing ratio than other regional horizontal orientation fiber.

Slot part 1 is the fluid (for example hot blast) that mainly is made of gas by direct injection as previously described, to the recessed zone of the thickness direction of this bondedfibre fabric.And then, in slot part 1, form peristome 3 and connecting portion 4.By spraying the fluid that mainly is made of gas, Qu Xiang fiber 101 (machine-direction oriented fiber) is blowed sidepiece 8 sides of convex shaped part 2 in the longitudinal direction.And, by the injected fluid that mainly constitutes by gas and/or be ejected on the elongate member 245 as the stuffiness portion of the supporting member of describing later 240, the fluid that mainly constitutes that its flow direction changes by gas, the fiber 101 (horizontal orientation fiber) of broad ways orientation is blowed connecting portion 4 sides.In other words, the fiber 101 of the peripheral region of peristome 3 is along this opening shape orientation.

In this bondedfibre fabric 180, the containing ratio of the machine-direction oriented fiber in the connecting portion 4 is minimum.In other words, the containing ratio of the horizontal orientation fiber of connecting portion 4 is the highest.Specifically, the containing ratio with the horizontal orientation fiber is 55% to 100%, 60% to 100% the mode of being preferably forms.Be lower than at the containing ratio of horizontal orientation fiber under 55% the situation, as hereinafter described, because the weight per unit area of slot part 1 is low, so be difficult to improve the intensity of bondedfibre fabric on width.Like this, for example, use at surface patch under the situation of this bondedfibre fabric 180 as absorbent commodity, in using the process of this absorbent commodity because and the friction of health, on width, produce longitude and latitude and slide, perhaps produce damaged danger.

The mensuration of fiber orientation, デ ジ タ Le マ イ Network ロ ス コ-プ (digital microscope) VHX-100 that utilizes the キ of Co., Ltd.-エ Application ス to make carries out, and carries out with method described below.(1) sample is placed on the observation platform in the mode that its length direction is in correct direction.(2) fiber that will appear at is brokenly nearby removed, and makes the focus of lens consistent with the most close preceding fiber of sample, and (3) set the photography degree of depth (depth), make the 3D rendering of sample on the PC picture.Secondly, (4) convert 3D rendering to the 2D image, and draw on picture length direction a plurality of parallel lines of five equilibrium rightly in measurement range (5).(6) in each unit of parallel lines sectionalization that draws, the orientation of observing fiber is first direction (length direction) or second direction (width), measures the radical towards the fiber of all directions.Then, (7) by calculating with respect to for the whole number of fiber in the setting range, towards the ratio of the number of fiber of the fiber orientation of first direction (length direction), and, can measure and calculate the orientation of fiber towards the ratio of the number of fiber of the fiber orientation of second direction (width).

[1.3] density of fiber

Shown in Figure 1A, Figure 1B, connecting portion 4 is adjusted, make the fibre density height of its fibre density than convex shaped part 2.

Specifically, the fibre density of connecting portion 4 can list at 0.05g/cm ³More than, be preferably 0.10 to 0.50g/cm ³, more preferably 0.15 to 0.20g/cm ³In the fibre density of this connecting portion 4 less than 0.05g/cm ³Situation under, collapse under the routed situation applying excessive external pressure, convex shaped part 2, have this connecting portion 4 routed situation of equally also can collapsing.

Adjust convex shaped part 2, make its average fiber density low than connecting portion 4.Specifically, can be for 0.005 to 0.20g/cm ³, be preferably 0.007 to 0.07g/cm ³In the fibre density of this convex shaped part 2 less than 0.005g/cm ³Situation under owing to be included in the own wt or the external pressure of the liquid in this convex shaped part 2, not only convex shaped part 2 collapse easily routed, and the situation that existed once absorbed liquid under pressurized state, to return easily.In addition, in the fibre density of convex shaped part 2 greater than 0.20g/cm ³Situation under, the liquid that this convex shaped part 2 brings is difficult to downwards to move, and exists liquid holdup in this convex shaped part 2, gives the situation of the sensation of user's humidity.

In addition, the fibre density of substantial middle portion towards the neighboring area at two ends from the length direction sidepiece of peristome 3 forms in the mode that two the end fibre densities of length direction to this peristome 3 uprise gradually.That is, the fibre density at the sidepiece place of the convex shaped part 2 of the sidepiece of the length direction of connection opening portion 3 forms in the mode that uprises gradually along with the length direction two ends of close peristome 3.This is because along with the size of peristome 3 becomes big, it is many that mainly the fluid that is made of gas is blowed the quantitative change of fiber 101 of connecting portion 4 sides.

In addition, this bondedfibre fabric 180, with the spatial area rate measured from the one side side that forms slot part 1 and convex shaped part 2 than from as with form from the low mode of the spatial area rate of the another side side mensuration of the face of the opposite side of face that forms slot part 1 and convex shaped part 2.

For the fiber web of describing in the back that on supporting member 240, is transferred 100, by gravity, fiber 101 to the opposite face side shifting of face of the fluid jet that mainly constitutes by gas, near the distance between the fiber at the position of this opposite face side the tendency that narrows down is being arranged.On the other hand, along with from the face of supporting member 240 1 side joints closely by the face side of the fluid jet that mainly constitutes by gas, interfibrous distance has the tendency that broadens.

And then by spraying the fluid that mainly is made of gas, the fiber 101 of close supporting member 240 sides is forced on this supporting member 240, towards the in-plane of supporting member 240.Thereby fiber spacing is from further narrowing down, and fiber is intensive easily each other.And in this state, by the heat treatment of heating furnace processing etc., fiber is hot adhesion each other, the free degree step-down of fiber 101, and the quantitative change in the space between the fiber of the another side side of bondedfibre fabric 180 is low.

On the other hand, along with from the face of supporting member 240 sides towards by the face side of the fluid jet that mainly constitutes by gas, fiber can excessively not flattened each other, in addition, at convex shaped part 2 places, run into supporting member 240 by the injected fluid that mainly constitutes and rebound by gas, fiber 101 partly exist with become with respect to the vertical mode of this supporting member 240 towards fiber.In this state, by with fiber hot adhesion each other, improve the spatial area rate in the cross section of fiber web 100.

Here, so-called spatial area rate refers to the spatial area that there the is not fiber ratio with respect to the gross area.In addition, the assay method of spatial area rate is as described below.

デ ジ タ Le マ イ Network ロ ス コ-プ (digital microscope) VHX-100 that sensing equipment uses the キ of Co., Ltd.-エ Application ス to make.At first, (1) on observation platform, the mode that becomes longitudinal direction with the direction along slot part 1 and convex shaped part 2 places sample on the sensing equipment, and (2) are on the summit of convex shaped part 2, from the outstanding face of convex shaped part 2 and from the face of the outstanding face opposition side of convex shaped part 2, carry out following mensuration respectively.

(3) suitably set the power of lens of sensing equipment and the magnifying power on the personal computer picture, with the fiber (removing the irregular fiber that appears at nearby) of close front side of the sample in focus of lens.Then, (4) suitably set the photography degree of depth (depth), make the 3D rendering of sample.

(5) 3D rendering is converted to the 2D image,, specify in the space between the fiber in this scope the volume complanation of setting.And then (6) carry out binarization (binaryzation) processing for the 2D image, and the position that fiber is existed is white, and the non-existent position of fiber is a black.Then, (7) make the non-existent position of fiber be white color inversion, measure the area of whitening etc.

Here, in this document, making magnifying power is that 300 times, the photography degree of depth are 220 μ m (per 20 μ m photography is once photographed 11 times altogether), carries out the mensuration of n=10, averages.

In addition, computer memory area occupation ratio as follows.

Spatial area rate (%)=(the space gross area (mm ²)/measurement range area (mm ²)) * 100

Here, the space gross area can be calculated by (multiplication factor during the space gross area during mensuration/mensuration), and in addition, the measurement range area can be calculated by (multiplication factor during the measurement range area during mensuration/mensuration).

Because the spatial area rate is high more, is equivalent to fiber spacing from wide more thick more, so fiber moves easily, free degree height.And then for the bondedfibre fabric that partly interfibrous distance is enlarged by opening processing etc., by improving the spatial area rate in each space, on the face of the fluid jet that the whole quilt in bondedfibre fabric mainly is made of gas, fiber spacing is from broadening.Therefore, for example, this bondedfibre fabric is being used under the situation of absorbent commodity etc., the resistance the when liquid that can integrally reduce regulation such as excreta sees through this bondedfibre fabric 180 makes liquid easier to be mobile in absorber etc.

Here, the spatial area rate in so-called each space, the gross area that refers to the non-existent space of fiber is with respect to the ratio of the number within the limits prescribed the non-existent space of fiber.Spatial area can calculate with following computing formula.

Spatial area (mm ²/)=(the space gross area (mm ²)/space number (individual))

The spatial area rate that the face of this convex shaped part 2 outstanding sides from convex shaped part 2 is measured is 5% to 100% with difference from the spatial area rate measured with the face of the outstanding face opposition side of this convex shaped part 2, is preferably 5% to 80%, more preferably 15% to 40%.

In addition, the spatial area rate of measuring from the face of the outstanding sides of convex shaped part 2 can be enumerated as 50% to 100%, is preferably 50% to 90%, and more preferably 50% to 80%.

And then, can be enumerated as 3000 μ m from the spatial area in each space that the face of the outstanding sides of convex shaped part 2 is measured ²More than, be preferably 3000 to 30000 μ m ², 5000 to 20000 μ m more preferably ²

[1.4] weight per unit area

The average weight per unit area of bondedfibre fabric 180 integral body particularly, can be enumerated as 10 to 200g/m ², be preferably 20 to 100g/m ²For example, under the situation of the surface patch that this bondedfibre fabric 180 is used for absorbent commodity, when average weight per unit area is lower than 10g/m ²The time, there is in use damaged easily situation.In addition, the average weight per unit area at this bondedfibre fabric 180 is higher than 200g/m ²Situation under, have the situation be difficult to make smoothly the liquid that brings to move downwards.

As mentioned above, convex shaped part 2 is adjusted, so that compare with slot part 1, the weight per unit area of fiber 101 uprises.Here, the weight per unit area of convex shaped part 2 particularly, can be enumerated as 15 to 250g/m ², be preferably 20 to 120g/m ²Weight per unit area at this convex shaped part 2 is lower than 15g/m ²Situation under owing to be included in the own wt or the external pressure of the liquid in this convex shaped part 2, convex shaped part 2 not only collapses routed easily, and the liquid that was once absorbing sometimes returns adding to depress easily.In addition, at the weight per unit area of convex shaped part 2 greater than 250g/m ²Situation under, the liquid that is difficult to make this convex shaped part 2 to bring moves downwards, liquid holdup sometimes gives the user sensation with humidity in this convex shaped part 2.

Adjust the average weight per unit area of slot part 1, make it lower than the average weight per unit area of the integral body that comprises slot part 1 and convex shaped part 2.Specifically, can list average weight per unit area in the bottom of slot part 1 is 3 to 150g/m ², be preferably 5 to 80g/m ²At the average weight per unit area of the bottom of this slot part 1 less than 3g/m ²Situation under, in use, have damaged easily situation.In addition, at the average weight per unit area of the bottom of this slot part 1 greater than 150g/m ²Situation under, the liquid that this slot part 1 brings is difficult to downwards (another side side) and moves, and is trapped in the slot part 1, has to give the user possibility with damp.

And then, adjust the average weight per unit area of slot part 1 integral body, make it to be lower than the mean value of the weight per unit area of convex shaped part 2 integral body.Specifically, the average weight per unit area of slot part 1 integral body below 90%, is preferably 3% to 90% with respect to the weight per unit area of convex shaped part 2, and more preferably 3% to 70%.The average weight per unit area of slot part 1 integral body with respect to the weight per unit area of convex shaped part 2 greater than 90% situation under, fall into the resistance of the liquid of slot part 1 when the below of bondedfibre fabric 180 (another side side) is mobile and uprise the situation that exists liquid to overflow from slot part 1.In addition, the weight per unit area of the bottom of slot part 1 with respect to the weight per unit area of convex shaped part 2 less than 3% situation under, in use damaged easily sometimes.

[1.5] other

For example, for the liquid-absorbent that makes regulation or see through and use under the situation of bondedfibre fabric 180 of this form of implementation, slot part 1 sees through liquid, because convex shaped part 2 is loose structures, so be difficult to keep liquid.And then, be formed on the peristome 3 in the slot part 1, except that liquid, solid is seen through.

Slot part 1 is owing to being formed with peristome 3, so be suitable for making liquid or solid to see through.And then, because in fiber 101 most of broad ways orientations of the bottom of slot part 1, so, can prevent that liquid is along the length direction excessive flow of slot part 1, expansion on a large scale.Though slot part 1 average weight per unit area is low, because at connecting portion 4 place's fibre density height, fiber 101 is orientated (CD orientation) on the width of this slot part 1, so bondedfibre fabric 180 improves to the intensity (CD intensity) of width.Therefore, even have bigger peristome 3, the intensity of width also can improve.

In addition, the containing ratio of the horizontal orientation fiber of slot part 1 per unit area is than convex shaped part 2 height, and at the sidepiece of convex shaped part 2, the containing ratio of the machine-direction oriented fiber of per unit area is than the height of the central portion of convex shaped part 2.And, in convex shaped part 2, contain along many than slot part 1 of the fiber 101 of thickness direction orientation.Whereby, even for example reduce, under the situation that discharges load, because the rigidity of the fiber 101 that is orientated on its thickness direction also is easy to return to original height by the load that applies thickness direction to convex shaped part 2, the thickness of convex shaped part 2.That is, can be described as a kind of restorative high bondedfibre fabric that compresses.

[1.6] manufacture method

Utilize Fig. 3 to Fig. 9 that the method for making the bondedfibre fabric 180 in this form of implementation is described below.At first, with fiber web 100 mountings to upper face side as the supporting member 240 of aeration supporting member.In other words, utilize supporting member 240 from following side bearing fiber web 100.

And the state supporting member 240 down that will be in this fiber web 100 of supporting moves to the direction of stipulating, the upper face side by the fiber web 100 that moves from this is gas jet continuously, can make the bondedfibre fabric 180 in this form of implementation.

Here, as shown in Figure 3, for supporting member 240, can list with the interval of regulation with a plurality of elongate member 245 almost parallels be configured in the top supporting member of netted supporting member 210.

Elongate member 245 is stuffiness portions that the main fluid that is made of gas is ventilated to the lower side.And, being ejected into the fluid that mainly constitutes on the elongate member 245 by gas, its flow direction changes.Like this, change the fluid that mainly is made of gas of its directions by the injected fluid that mainly is made of gas and/or by elongate member 245, fiber 101 is moved, and forms peristome 3 and connecting portion 4.

In detail, by the zone of the fluid jet that mainly is made of gas, the machine-direction oriented fiber in this zone is blowed the zone with this zone adjacency, and, by recessed, form a plurality of slot parts along thickness direction.

And, between a plurality of slot parts 1, form convex shaped part 2, because the fiber 101 that is blowed from this slot part 1, the fibre density of the sidepiece 8 of this convex shaped part 2 uprises, and simultaneously, uprises at the containing ratio of the machine-direction oriented fiber of this sidepiece 8.

Simultaneously, in slot part 1, the injected fluid that mainly is made of gas changes its flow direction by elongate member 245, the fluid that mainly constitutes that changes by the fluid that mainly constitutes by gas that sprays and/or flow direction by gas, machine-direction oriented fiber is blowed convex shaped part 2 sides, in addition, the horizontal orientation fiber is blowed the front and back of injected prescribed direction, forms peristome 3 and connecting portion 4.

In addition, in order to form bondedfibre fabric 180, also can use different supporting members with peristome 3.Utilize employed supporting member, can change the size of slot part 1, convex shaped part 2, peristome 3 and connecting portion 4 or arrangement etc.

For example, can list on the reticular component of regulation shown in Figure 3 and dispose the member of stuffiness portion with the figure of stipulating, or the member that between wire that inweaves and wire, is formed with a plurality of regulations hole portion as shown in Figure 5 etc.

As the member that on the reticular component of this regulation, disposes stuffiness portion with the figure of regulation, be as described above, but,, also can list and suitably change as the shape of the elongate member 245 of stuffiness portion or the member of configuration as other form of implementation.Stuffiness portion also can pass through landfill (for example, utilizing slicken solder, resin etc.) and form as the reticulated cell of ventilating part except the situation of the one side side that elongate member 245 shown in Figure 3 is configured in netted supporting member 210.

Member as form the hole portion of a plurality of regulations between wire that inweaves and wire can list supporting member shown in Figure 5 275.Supporting member 275 for example be the regulation rugosity of arranging with respect to almost parallel ground wire 276 with a plurality of wires 276 each other the mode of bridge joint the wire 277 of other regulation rugosity alternately is wound into the aeration net of the spiral braiding that helically forms.

Wire 276 and wire 277 in this supporting member 275 become stuffiness portion.In addition, the part of being surrounded by the wire 276 in this supporting member 275 and wire 277 becomes the hole portion 278 as ventilating part.

Under the situation of this supporting member, partly change by the rugosity that makes the method that inweaves or silk, the shape of silk, can venting quality be changed.For example, can make wire 276 be stainless circular wire, wire 277 is stainless flat filament, carries out the supporting member of spiral braiding.

But, wire that becomes stuffiness portion 276 in this case and wire 277 are (particularly, intersection point part wiry) venting quality with respect to as the venting quality at hole portion 278 places of ventilating part below 90%, preferably 0 to 50%, more preferably 0 to 20%.Here, 0% refer in fact the fluid that mainly constitutes and to ventilate by gas.

Here.In bondedfibre fabric manufacturing installation 90, by the direction stipulated successively moving web 100 on one side form bondedfibre fabric 180 on one side.The bondedfibre fabric manufacturing installation 90 of making the bondedfibre fabric 180 of this form of implementation comprises: aeration supporting member 200, and this aeration supporting member 200 is from the fiber web 100 of a side bearing as fiber assembly; As the ejection portion 910 of injection equipment and not shown air feed part, described injection equipment is from spraying the fluid that mainly gas be made of by aeration supporting member 200 from the fiber web 100 of this fiber assembly of conduct of an aforementioned side bearing as the another side side direction of the fiber web 100 of this fiber assembly; As the conveyer 930 of travel mechanism, described travel mechanism will move to the direction F of regulation as the fiber web 100 of fiber assembly.

In addition, conveyer 930 comprises: the aeration band portion 939 of aeration, and described aeration band portion 939 forms the ring-type of the horizontal length of mounting aeration supporting members 200; Rotating part 931,933, described rotating part 931,933 be positioned at the aeration band portion 939 that forms laterally long ring-type the inboard, be configured in the two ends of length direction, make of the direction rotation of the aeration band portion 939 of this ring-type to regulation.

As mentioned above, conveyer 930 makes the aeration supporting member 200 that is in from the state of following side bearing fiber web 100 move along prescribed direction F.Specifically, as shown in Figure 6, fiber web 100 is moved in the mode of the downside by ejection portion 910.And then, make fiber web 100 to move by mode as the inside of the heater portion 950 of the two sides opening of heating arrangements.

As shown in Figure 8, injection equipment comprises not shown air feed part and ejection portion 910.Not shown air feed part is connected in the ejection portion 910 via snorkel 920.Snorkel 920 can be connected to the upside of ejection portion 910 with ventilating.As shown in Figure 9, the interval with regulation forms a plurality of ejiction openings 913 in ejection portion 910.

From not shown air feed part via the supplied gas gas of ejection portion 910 of snorkel 920, from being formed on a plurality of ejiction openings 913 ejections in the ejection portion 910.Be ejected into continuously by upper face side from the gas of a plurality of ejiction opening 913 ejections from the fiber web 100 of following side bearing on aeration supporting member 200.Specifically, the gas that sprays from a plurality of ejiction openings 913 is ejected into continuously and is in the upper face side that is transferred the fiber web 100 of device 930 under the state that the direction F of regulation moves.

Below ejection portion 910,915 pairs of suction unit being configured in the downside of aeration supporting member 200 carry out air-breathing from 910 ejections of ejection portion, gas etc. by aeration supporting member 200.Here, air-breathing by utilizing this suction unit 915 to carry out, can fiber web 100 be located in the mode that is adjacent on the aeration supporting member 200.And then, by air-breathing, can under the state of the slot part shapes such as (concavo-convex) that further keeps being shaped, in heater portion 950, carry by air flow.In this case, preferably, when utilizing air flow to be shaped, on one side air-breathing one side be transported to heater portion 950.

Attract (air-breathing) injected fluid that mainly constitutes by this suction unit 915, can prevent that the main fluid that is made of gas of running into aeration supporting member 200 from rebounding, and prevents the shape disorder of fiber web 100 superfluously by gas.

Attract mainly the intensity of the fluid that constitutes by gas, reach the intensity that to be pressed to the degree on the supporting member by the fiber 101 in the zone of the fluid jet that mainly constitutes by gas and get final product.

In addition, air quantity by the fluid that mainly is made of gas that adjust to spray or temperature, introducing amount, the aeration of supporting member, the weight per unit area of fiber web 100 etc. can make the shape of convex shaped part 2 change.For example, almost impartial or attract under the many situations of the amount of the main fluid that constitutes by gas of (air-breathing) in the amount of the main fluid that constitutes by gas of the amount of the main fluid that constitutes by gas that makes injection and attraction (air-breathing), for example, the rear side of the convex shaped part 2 in the bondedfibre fabric 115 (bondedfibre fabric 180) forms in the mode along the shape of aeration supporting member 200.Thereby under aeration supporting member 200 was smooth situation, the conduct in this bondedfibre fabric 115 (bondedfibre fabric 180) and the rear side of the face of the opposite side of face that forms slot part 1 and convex shaped part 2 became general planar.

Here, introduce the fluid that mainly constitutes by downside by gas from aeration supporting member 200, move while being pushed to these aeration supporting member 200 sides owing to spray mainly the fiber in the zone of the fluid that constitutes by gas, so fiber concentrates on aeration supporting member 200 sides.In addition, at convex shaped part 2 places, the fluid collision aeration supporting member 200 that mainly is made of gas by injected suitably rebounds, and becomes the state of pars fibrosa ground towards thickness direction.

Temperature from the fluid that mainly constitutes by gas of each ejiction opening 913 ejections, also can be normal temperature, but, for example, for the formability that makes slot part (concavo-convex), peristome good, this temperature can be adjusted to more than the softening point of the thermoplastic fibre at least that constitutes fiber assembly, preferably adjust to fusing point+50 ℃ to-50 ℃ temperature range in.When fiber softening, because the bounce of fiber itself reduces, so the shape of utilizing maintenances fiber such as air flow to arrange again easily is when further raising temperature, owing to fiber heat bonding each other begins, so the shape of easier maintenance slot part (concavo-convex) etc.Thereby, under the state of the shape that keeps slot part (concavo-convex) etc., in heater portion 950, carry easily.

As the heater portion 950 of heating arrangements both ends open at prescribed direction F.Whereby, be positioned in the fiber web 100 (bondedfibre fabric 120) that is transferred on the aeration supporting member 200 that device 930 moves and be trapped in the heating space that is formed at heater portion 950 inside, and move continuously with official hour.For example, in the fiber 101 that constitutes fiber web 100 (bondedfibre fabric 180), contain under the situation of thermoplastic fibre the heating in this heater portion 950 that can pass, the bondedfibre fabric 115 that fiber 101 mutually combines.

Aeration supporting member 200 can suitably be changed according to the bondedfibre fabric of making.For example, under the situation of the bondedfibre fabric 180 of making this form of implementation,, can use above-mentioned supporting member 240 as aeration supporting member 200.

State in the use under the situation of supporting member 240 as the aeration supporting member, with fiber web 100 mountings to the supporting member 240 of upper face side along with the length direction of elongate member 245 roughly the direction of quadrature move.Whereby, with elongate member 245 roughly on the direction of quadrature continuously to the upper face side gas jet of fiber web 100.That is, along with elongate member 245 roughly the direction of quadrature form slot part 1.And the peristome of describing later 3 is formed at the position that elongate member 245 and slot part 1 intersect.

The size of peristome 3 or pitch can be by the shape of the stuffiness portion of supporting member (Fig. 3,4 elongate member 245 or wire 276 of Fig. 5 etc.) and the shape arbitrary decisions of ejiction opening 913.Promptly, the MD size of peristome 3 (size of length direction) exists with ... the MD size (size of length direction) of stuffiness portion in each supporting member, and the CD size of peristome 3 (size of width) exists with ... the CD size (size on the width) of ejiction opening 913.In addition, the MD pitch of peristome 3 (length between the center of this peristome 3 at adjacent in the longitudinal direction peristome 3 places) exists with ... the MD pitch (length on the length direction between the centre position at adjacent stuffiness portion place) of the stuffiness portion on each supporting member.By in time changing them, can form the peristome 3 of desirable size or pitch.In addition, the shape of ejiction opening can list just circle, ellipse, square, rectangle etc., and under the situation of the CD of enlarged opening portion 3 size (length of width), long rectangle or the ellipse of horizontal direction is preferred.

As mentioned above, elongate member 245 is stuffiness members, for example, does not make from the gas of upper side injection and ventilates to the lower side.In other words, be injected into the gas on the elongate member 245, its flow direction is changed.

In addition, elongate member 245 does not make the fiber 101 in the fiber web 100 move to the lower side of supporting member 240.

Therefore, constitute the moving of fiber 101 of fiber web 100, the gas that sprays by the upper face side from fiber web 100 and/or as injected gas, by fiber web 100 ventilations simultaneously, is moved by the gas that changes flow directions by elongate member 245.

For example, the fiber 101 in the zone of being sprayed by gas is to moving with the zone of this zone adjacency.And because the zone of being sprayed by gas moves to prescribed direction, so the result, move in the zone of the side on the prescribed direction of being sprayed by gas in the continuous zone.

Thereby when forming slot part 1, the fiber 101 of the bottom in slot part 1 moves in the mode that is orientated on width.In addition, form convex shaped part 2 between slot part 1 and slot part 1, uprise in the fibre density of the side of this convex shaped part 2 one, fiber 101 is orientated etc. along its length.

And then as injected gas, with fiber web 100 ventilations, simultaneously, the gas that is changed flow direction by elongate member 225 makes the fiber 101 that constitutes fiber web 100 to moving with above-mentioned different direction.

Owing to constitute netted supporting member 210 and elongate member 245 restriction fibers 101 side shifting below supporting member 240 of supporting member 240, on the direction above supporting member 240 so fiber 101 moves.

In detail, the gas that is ejected on the elongate member 245 becomes mobile on the direction of this elongate member 245.Mobile so reformed gas, the zone is mobile towards periphery above elongate member 245 to make the top fiber 101 that is configured in elongate member 245.Whereby, form regulation shaped aperture portion 3.In addition, can adjust in orientation, density or the weight per unit area of fiber 101 more than one or two.

In addition, be injected into temperature, amount or the intensity of the fluid that mainly constitutes by gas on the fiber web 100 by adjustment, and adjust the translational speed of the fiber web 100 in the travel mechanism, adjust tension force etc., promptly use identical supporting member, also can make form or the weight per unit area or the different bondedfibre fabric of fibre density of peristome 3, slot part 1, convex shaped part 2.In addition, be injected into temperature, amount or the intensity of the fluid that mainly constitutes by gas on the fiber web 100 by adjustment, and adjust the translational speed of the fiber web 100 in the travel mechanism, adjust tension force etc., even different supporting members also can be made form or the weight per unit area or the identical bondedfibre fabric of fibre density of peristome 3, slot part 1, convex shaped part 2.

In addition, state in the use under the situation of supporting member 275 (Fig. 5), in slot part 1, when the intersection point that is injected into the wire 276 at supporting member 275 places and wire 277 when the fluid that mainly is made of gas was partly gone up, this was mainly partly changed flow direction by the fluid that gas constitutes by this intersection point.Therefore, will be sprayed forwards, backwards, form peristome 3 by the fiber 101 that this intersection point partly supports.

And, by the zone of the supporting of the part outside the intersection point in the slot part 1 part, because fiber 101 is urged on this supporting member 275, so be limited moving downwards.In addition, by by the mobile horizontal orientation fiber of intersection point part wiry, form connecting portion 4.

Here, the venting quality in becoming the zone of ventilating part, for example, can be for 10000 to 60000cc/cm ²Min is preferably 20000 to 50000cc/cm ²Min.But, in the aeration supporting member, for example, under the situation of digging through formation ventilating parts such as metallic plate, owing to do not exist the main fluid that constitutes by gas to lead to the resistance of this plate portion, so venting quality is more than the numerical value of above-mentioned record sometimes.

Employed supporting member, the zone that becomes stuffiness portion is compared with the zone that forms ventilating part, and surperficial sliding is preferred when high.By improving sliding, in the zone that the zone and the stuffiness portion of the fluid jet that mainly is made of gas intersect, fiber 101 is easy to move, so, can improve the formability of peristome 3 and connecting portion 4.

Other form of implementation

Below, the form of distortion of the form of implementation of bondedfibre fabric of the present invention is described.In addition, in the form of distortion below, the part that does not have to specify is the same with first kind of form of implementation, under the situation that the label of being paid is also the same with first kind of form of implementation, adopts identical label in the accompanying drawings.

Utilize Figure 10 to Figure 13, form of implementation in second kind of form of implementation to the four in the bondedfibre fabric of the present invention is described.Second kind of form of implementation is and the face of the convex shaped part that the forms bondedfibre fabric form of implementation of the different form of a face of tossing about mutually.The third form of implementation is the variform form of implementation of bondedfibre fabric integral body.The 4th kind of different form of implementation of convex shaped part that form of implementation is a bondedfibre fabric.

[2.1] second kinds of forms of implementation

Utilize Figure 10 that second kind of form of implementation of bondedfibre fabric of the present invention is described.

As shown in figure 10, the bondedfibre fabric 182 of this form of implementation, they are different with first kind of form of implementation with the slot part 1 and the form of the face of the opposite side of face of convex shaped part 2 in being formed with this bondedfibre fabric 182.Be that the center describes with difference below with first kind of form of implementation.

[2.1.1] bondedfibre fabric

The bondedfibre fabric 182 of this form of implementation forms slot part 1 and convex shaped part 2 in its one side top-cross side by side for ground.And in another face side of bondedfibre fabric 182, the zone that is positioned at the bottom surface of convex shaped part 2 forms to give prominence to side-prominent modes to this convex shaped part 2.In other words, bondedfibre fabric 182, in the another side side of this bondedfibre fabric 182, the zone on the bottom surface that is positioned at convex shaped part 2 of this one side side is recessed into and the formation recess.Be positioned at the zone of the another side side on the bottom surface of slot part 1 of this one side side, outstanding to the direction opposite with the convex shaped part of one side side, form convex shaped part.

[2.1.2] manufacture method and supporting member

The manufacture method of the bondedfibre fabric 182 of this form of implementation is identical with the record of first kind of form of implementation.In addition, for the supporting member that when making this bondedfibre fabric 182, uses, can use with first kind of form of implementation in the same supporting member of supporting member 240.

This bondedfibre fabric 182 utilizes in side below it under state of supporting member 240 supportings, sprays the fluid that mainly is made of gas, simultaneously, and from the main fluid that constitutes by gas of the below attraction (air-breathing) of supporting member 240.And the amount of the fluid that mainly is made of gas that is attracted (air-breathing) by making is less than the amount of the injected fluid that mainly is made of gas.When the injected main fluid ratio that is made of gas is attracted the amount of the fluid that mainly is made of gas of (air-breathing) when big, the injected fluid that mainly constitutes by gas for example with supporting member 240 collisions as the aeration supporting member, rebound.Whereby, to form to the outstanding mode of the direction identical as side (bottom surface side) below the inboard of convex shaped part 2 with the convex shaped part 2 of the upper face side of convex shaped part 2.In other words, according to convex shaped part 2 to protruding side-prominent situation, below side also outstanding.

When the convex shaped part 2 of bondedfibre fabric 182 when lateral bending is bent upward, relatively outstanding with the zone of the another side side of the slot part 1 of convex shaped part adjacency, form to following side-prominent convex shaped part.That is, form to opposite with projected direction in the convex shaped part one side-prominent outburst area, bondedfibre fabric 182 becomes the waveform that is made of convex shaped part and slot part.

[2.2] the third form of implementation

Utilize Figure 11 and Figure 12 that the third form of implementation of bondedfibre fabric of the present invention is described.

[2.2.1] bondedfibre fabric

As shown in figure 11, the bondedfibre fabric 184 of this form of implementation is different with first kind of form of implementation on the wavy fluctuating this point in that bondedfibre fabric 184 is whole.Below, be that the center describes with difference with first kind of form of implementation.

The bondedfibre fabric 184 of this form of implementation with these bondedfibre fabric 184 integral body have the direction of extending with respect to slot part 1 and convex shaped part 2 roughly the mode of the wavy fluctuating of quadrature form.

[2.2.2] manufacture method

For the manufacture method of the bondedfibre fabric 184 of making this form of implementation, the same with first kind of form of implementation, still, as the form difference of the supporting member of aeration supporting member.The supporting member 280 of this form of implementation, as shown in figure 12, be a kind of on netted supporting member 260 with the interval almost parallel of regulation dispose the supporting member of a plurality of elongate members 285.

The supporting member 280 of this form of implementation as shown in figure 12, is the supporting member that any one direction upper edge parallel direction in the length direction of supporting member 280 or short direction has wavy fluctuating.The netted supporting member 260 that constitutes supporting member 280 is formed with the little hole portion 263 in a plurality of apertures, and the gas that sprays from the upper face side of fiber web 100 is not subjected to the obstruction of this netted supporting member 260, ventilation downwards.This netted supporting member 260 can not cause the fluid that mainly is made of gas that sprays mobile big variation in addition, does not make fiber 101 move to the below of this netted supporting member 260.

And then the top elongate member 285 that is configured in the netted supporting member 260 that constitutes supporting member 280 is stuffiness portions that the fluid that mainly is made of gas that sprays from above is ventilated downwards.And, the flow direction of the fluid that mainly is made of gas that sprays from above is changed.Whereby, be ejected into the fluid that mainly constitutes by gas on the elongate member 285 and/or be ejected on this elongate member 285, the reformed fluid that mainly is made of gas of its flow direction moves fiber 101, forms peristome 3.

And then, itself has fluctuating owing to constitute the netted supporting member 260 of this supporting member 280, so by the fluid that mainly is made of gas that sprays from the upper face side of fiber web 100, fiber web 100 is configured as the shape that has along the fluctuating of the shape of this supporting member 280.

In this form of implementation, by on one side to be positioned in supporting member 280 above fiber web 100 spray the fluid that mainly constitutes by gas, Yi Bian this fiber web 100 is moved along the axle directions X, can form this bondedfibre fabric 184 of this form of implementation.

The form of the fluctuating in the supporting member 280 can be set arbitrarily.For example, the pitch between the top of the fluctuating on the directions X as shown in figure 12 for example can be 1 to 30mm, is preferably 3 to 10mm.In addition, the difference of height of the top and bottom of the fluctuating on this supporting member 280 for example, can be preferably 3 to 10mm for 0.5 to 20mm.And then, be not limited to shown in Figure 12 wavy at the cross sectional shape of this supporting member 280 on directions X, for example, also can be to form the shape that the mode of acute angle links up general triangular with each summit that rises and falls, perhaps, with the mode of each summit general planar of rising and falling will be roughly the concavo-convex shape that links up etc. of square shape.

The bondedfibre fabric 184 of this form of implementation can utilize above-mentioned bondedfibre fabric manufacturing installation 90 to make.The manufacture methods of the bondedfibre fabric 184 of this bondedfibre fabric manufacturing installation 90 etc. can be with reference to the record in the explanation of the manufacture method of the bondedfibre fabric 180 of first kind of form of implementation and bondedfibre fabric manufacturing installation 90.

[2.3] the 4th kinds of forms of implementation

Utilize Figure 13 that the 4th kind of form of implementation of bondedfibre fabric of the present invention is described.

As shown in figure 13, the bondedfibre fabric 186 of this form of implementation and the difference of first kind of form of implementation are to be formed on the second different convex shaped part 22 of height on the thickness direction of the convex shaped part 2 that the one side side of this bondedfibre fabric 186 forms.Below, the difference with first kind of form of implementation is described.

[2.3.1] bondedfibre fabric

This is the bondedfibre fabric that is formed with a plurality of slot parts 1 in the one side side of this bondedfibre fabric 186 side by side.And, between each of a plurality of slot parts 1, alternately form a plurality of convex shaped parts 2 and a plurality of second convex shaped part 22 respectively.The described convex shaped part 2 and second convex shaped part 22 and a plurality of slot part 1 the same formation side by side.In addition, on each of slot part 1, form peristome 3 and connecting portion 4.

The convex shaped part 2 and second convex shaped part 22 be in the fiber web 100 not by the zone of the fluid jet that mainly constitutes by gas, by forming slot part 1, become relatively outstanding zone.Second convex shaped part 22, for example, compare with convex shaped part 2, height on the thickness direction of this bondedfibre fabric 186 is low, it is little that length on width also forms, but density, fiber orientation and weight per unit area etc. for the fiber in this second convex shaped part 22 similarly form with convex shaped part 2.

The convex shaped part 2 in the bondedfibre fabric 186 and the configuration of second convex shaped part 22 between each of a plurality of slot parts 1 that form side by side, form the convex shaped part 2 and second convex shaped part 22.And convex shaped part 2 is to form across slot part 1 mode adjacent with second convex shaped part 22.In addition, on the contrary second convex shaped part 22 is to form across slot part 1 and convex shaped part 2 adjacent modes.That is, the convex shaped part 2 and second convex shaped part 22 alternately form across slot part 1.Specifically, the order with convex shaped part 2, slot part 1, second convex shaped part 22, slot part 1, convex shaped part 2 repeatedly forms this configuration figure.In addition, the position of the convex shaped part 2 and second convex shaped part 22 relation is not limited thereto, can be according to the part of bondedfibre fabric 186 at least to form across slot part 1, mode that a plurality of convex shaped part 2 is adjacent respectively.In addition, a plurality of second convex shaped parts 22 also can form in adjacent respectively mode.

[2.3.2] manufacture method and supporting member

The manufacture method of the bondedfibre fabric 186 in this form of implementation the same with described in first kind of form of implementation still, is used for the form difference of ejiction opening 913 of bondedfibre fabric manufacturing installation 90 of the manufacturing of bondedfibre fabric 186.

By the fluid jet that on one side will be mainly constitutes by gas to be positioned in supporting member 240 above fiber web 100 on, make it along prescribed direction to move formation bondedfibre fabric 186 on one side.When spraying mainly the fluid that constitutes by gas, form slot part 1, convex shaped part 2, second convex shaped part 22, peristome 3 and connecting portion 4, but their formation can at random change by the form of the ejiction opening 913 of the fluid that mainly is made of gas in the bondedfibre fabric manufacturing installation 90.

For example, as shown in figure 13, in order to form this bondedfibre fabric 186, for example, carry out at the interval of ejiction opening 913 that can be by adjust spraying mainly the fluid that is made of gas.For example, narrower by the interval that makes ejiction opening 913 than the interval of the ejiction opening 913 of first kind of form of implementation, can form the second low convex shaped part 22 of height of comparing thickness direction with convex shaped part 2.In addition, wideer by the interval that makes ejiction opening 913 than the interval of the ejiction opening 913 of first kind of form of implementation, also can form the high convex shaped part of height of comparing thickness direction with convex shaped part 2.And the interval forming ejiction opening 913 disposes by the mode that replaces with narrow interval and wide interval, can form this bondedfibre fabric 186 that the convex shaped part 2 and second convex shaped part 22 alternately dispose side by side across slot part 1.The interval of this ejiction opening 913 is not limited thereto, and the height of the convex shaped part 2 by the bondedfibre fabric wanting to form and the arrangement of second convex shaped part 22 can at random form.And the interval forming ejiction opening 913 disposes by the mode that replaces with narrow interval and wide interval, forms this bondedfibre fabric 186 that the convex shaped part 2 and second convex shaped part 22 alternately dispose side by side across slot part 1.

The bondedfibre fabric 186 of this form of implementation can utilize above-mentioned bondedfibre fabric manufacturing installation 90 to make.The manufacture methods of the bondedfibre fabric 186 in this bondedfibre fabric manufacturing installation 90 etc. can be with reference to the record in the explanation of the manufacture method of the bondedfibre fabric 180 of first kind of form of implementation and bondedfibre fabric manufacturing installation 90.

Embodiment

＜fibre structure 〉

Use core sheath structure with high density polyethylene (HDPE) and polyethylene terephthalate, average fineness fiber A, with the mixed cotton of fiber B different with fiber A on coating hydrophobicity finish this point as 3.3dtex, average fiber length 51mm, the hydrophilic finish of coating.Use the mixing ratio of fiber A and fiber B to be 70:30, weight per unit area is adjusted to 40g/m ²Fiber assembly.

＜create conditions

The rectangle that is shaped as horizontal length of ejiction opening 913 shown in Figure 9, the cross sectional shape of ejiction opening 913 are square column type.With vertical 1.0mm, laterally the pitch 14mm of 913 of 6.0mm, ejiction opening forms a plurality of ejiction openings 913.In addition, the width of ejection portion 910 is 500mm.105 ℃ of temperature, air quantity 10001/minute condition under spray hot blast.

The sleeve of the stainless steel-like of digging through of the rectangular shape of the horizontal length that the turning of supporting mass use length 2mm, width 70mm is rounded.In this sleeve, at MD direction (length direction: the direction that slot part or convex shaped part extend) separate the interval of 12mm, separate the interval of 3mm in CD direction (short direction: the direction of extending with slot part or convex shaped part is the direction of quadrature roughly), be configured to the above-mentioned figure of digging through latticed.In addition, the thickness of sleeve is 0.5mm.

With the fiber speed of foregoing fibre structure is that 20m/ minute carding machine is opened fibre, makes fiber web, with the width severing fiber web of 450mm.Then, utilize 20 purpose aeration net conveying fiber nets with 3m/ minute speed.Utilize the design of foregoing ejection portion 910 and ejiction opening 913, under the condition of 105 ℃ of temperature, air quantity 1200l/ minute, jet airstream.Then, the below from the aeration net attracts (air-breathing) with the uptake less than hot blast rate.Afterwards, utilizing the aeration net to carry under this fibroreticulate state, in the stove of setting 125 ℃ of temperature, hot blast air quantity 10Hz for, carry about 30 seconds.

＜result 〉

Convex shaped part: weight per unit area is 52g/m ², the length of thickness direction is 3.8mm, fibre density is 0.01g/cm ³, the width of each of this convex shaped part is 8.5mm, pitch is 14mm.

Slot part: weight per unit area is 11g/m ², the length of thickness direction is 1.8mm, fibre density is 0.007g/cm ³, the width of each of this slot part is 5.5mm, pitch is 14mm.

Connecting portion: weight per unit area is 30g/m ², the length of thickness direction is 1.8mm, fibre density is 0.02g/cm ³, the width of each of this connecting portion is 5.5mm, and the length of each of connecting portion is 2.1mm, and the pitch of MD direction is 15.0mm, and the pitch of CD direction is 14.0mm.

Peristome: the width of each of this peristome is 5.3mm, and the length of each of peristome is 11.5mm, and the pitch of MD direction is 15.0mm, and the pitch of CD direction is 14.0mm.

Shape: form convex shaped part, slot part, peristome and connecting portion respectively, the back side of convex shaped part becomes the innermost shape that does not form this bondedfibre fabric to the direction protuberance identical with convex shaped part.In addition, at slot part, the direction of extending along this slot part alternately forms a plurality of connecting portions and peristome.The area that is this peristome is 61.0mm ²The rectangular shape of vertical length, the rounded shape in turning.

The purposes example

As the purposes of bondedfibre fabric of the present invention, for example, can list surface patch in the absorbent commodity of sanitary napkin, lining, diaper etc. etc.In this case, convex shaped part can be any one in skin surface side, the rear side, still, by forming skin side, owing to can reduce area with contact skin, so, be not easy to give the damp that causes by liquid.In addition, surface patch and the intermediate between the absorber that also can be used as absorbent commodity uses.Owing to reduce, so there is the situation about returning of being not easy from absorber with the contact area of surface patch or absorber.In addition because and the contact area of skin reduce or have a buffering sense, so, also can use in the outer surface (most external) of the lateral plate of absorbent commodity, diaper etc. and the negative material of face fastener (face Off ア ス Na-) etc.In addition, also can be used to remove many aspects such as wiper attached to dust on bed or the health etc., mouth mask, breast milk pad.

[4.1] surface patch of absorbent commodity

Purposes as bondedfibre fabric of the present invention, shown in Figure 14,15, for example, can list concavo-convex with having, be provided with the situation that a plurality of peristomes and the bondedfibre fabric of comparing the relative higher connecting portion of fibre density with convex shaped part use as the surface patch 301,302 of absorbent commodity at recess.In this case, preferably, the mode that becomes skin side with the face that is formed with convex shaped part disposes this bondedfibre fabric.

Under with the situation of this bondedfibre fabric as surface patch 301,302 uses of absorbent commodity, when the liquid of regulation was drained, this liquid mainly fell into slot part.In addition, owing to be provided with peristome, so, for example,, also move to absorber easily by peristome even contain the liquid with viscosity of solid constituent, can suppress liquid and expand from the teeth outwards on a large scale.

And then, because the major part at the fiber at connecting portion place is orientated along width, so, to the tensile strength height of width, wearing in the process of absorbent commodity, can prevent to apply towards the power of friction of width etc. and make this surface patch 301,302 breakages.

On the other hand, the sidepiece of convex shaped part is because fiber is intensive each other, so the rigidity height.And, owing to the containing ratio height of the machine-direction oriented fiber that is orientated along its length,, for example, also be very high even convex shaped part by the conquassation of loading, compresses restorative so, also can prevent by conquassation easily even load is applied on the convex shaped part.

Therefore, even be applied to the load variations of showing on the sheet 301,302, also can keep low with the contact area of skin by the posture change of health, so can keep sense of touch, and then, returned even once be absorbed the liquid of bulk absorption, also be difficult to be attached on the skin once more on a large scale.

[4.2] intermediate of absorbent commodity

Purposes as bondedfibre fabric of the present invention, as shown in figure 16, for example, can list concavo-convex with having, be provided with the situation that a plurality of peristomes and this bondedfibre fabric of comparing the relative high connecting portion of fibre density with convex shaped part 2 use as the intermediate 311 of absorbent commodity at recess.In this case, preferably, the mode that becomes surface patch 310 sides with the face that is formed with convex shaped part disposes this bondedfibre fabric.

According to bondedfibre fabric of the present invention, because the fibre density height of connecting portion, and then most of fiber of connecting portion is orientated to width, so the mode high with the tensile strength of width forms.Whereby, wearing in the process of this absorbent commodity,, also can prevent intermediate 311 breakages even absorbent commodity distortion etc. is applied the load that stretches towards width on intermediate 311.

In addition, this bondedfibre fabric is disposed as intermediate 311, can between surface patch 310 and intermediate 311, a plurality of spaces be set by the mode that becomes surface patch 310 sides with the face that is formed with convex shaped part.And then by on intermediate 311 peristome being set, even drain in the short time under the situation of big quantity of fluid, the factor that hinders liquid to see through is few, and this liquid is moved to absorber.And, can prevent that this liquid from returning surface patch 310 and also expanding on a large scale.

And then, returned even once seeing through the liquid that intermediate 311 is absorbed bulk absorption, because intermediate 311 is low with the contact rate of surface patch 310, so this liquid is difficult to return surface patch 310 once more attached on the skin on a large scale.

In addition, because the central portion of convex shaped part is compared with sidepiece or slot part, it is many to contain the fiber that is orientated along thickness direction, and the summit of the convex shaped part on this intermediate 311 contacts with surface patch 310, so the liquid that will remain on the surface patch 310 is introduced to thickness direction easily.Whereby, liquid is difficult on the residual surface patch 310.

Like this, can obtain the fixed point in the surface patch 310 and the low-residual of liquid, can prevent that liquid is on a large scale for a long time attached on the skin.And then, because the sidepiece of convex shaped part in intermediate 311, the containing ratio height of Qu Xiang machine-direction oriented fiber along its length, so, the liquid that moves to sidepiece from surface patch 310 can be guided to length direction.Whereby, even in intermediate 311, liquid spreads to width, also can prevent to bring out the leakage from absorbent commodity, can improve the absorption efficiency of absorber.

[4.3] most external of absorbent commodity

Purposes as bondedfibre fabric of the present invention, as shown in figure 17, for example, can list concavo-convex with having, be provided with the situation that a plurality of peristomes and the bondedfibre fabric of comparing the relative higher connecting portion of fibre density with convex shaped part use as the most external 321 of absorbent commodity at recess.In this case, preferably, the mode that becomes the outside of this absorbent commodity with the face that is formed with convex shaped part disposes this bondedfibre fabric.

Most external 321 is owing to the mode that becomes the outside of absorbent commodity with the face that is formed with convex shaped part disposes, so when using this absorbent commodity, under situation about mainly touching with hand, sense of touch is good.In addition, by means of the peristome of slot part, aeration is good.

Each works

Describe each works below in detail.

[5.1] about bondedfibre fabric

[5.1.1] fiber assembly

Fiber assembly is to form the roughly fiber assembly of sheet, is in the state that the fiber that constitutes this fiber assembly has the free degree.In other words, be fiber assembly with the free degree between the fiber.Here, the free degree between the so-called fiber refers to the degree that by the fluid that mainly is made of gas fiber can be moved freely as the fiber web of fiber assembly.This fiber assembly, for example, can by with the blended fiber of a plurality of mixed with fibers with the fibrolaminar mode that the forms specific thickness formation of gushing out.In addition, for example, can be by each of a plurality of different fibers be formed the formation of gushing out of fibrolaminar mode with lamination several times.

As fiber assembly of the present invention, for example, can list the fiber web that utilizes combing method to form, the fiber web before fiber heat bonding is each other solidified in perhaps hot sticky merging.In addition, can list the net that forms by the air lay method, the fiber web before fiber heat bonding is each other solidified in perhaps hot sticky merging.In addition, can list the heat bonding curing fiber web before that utilizes the sticking method embossing of point.In addition, can list and utilize the also embossed fiber assembly in the past of spun-bond process spinning, fiber assembly is before solidified in perhaps embossed heat bonding.In addition, can list and utilize needle point method fiber web that form, that partly interweave.In addition, can list the half crossed fiber net that utilizes jet net-spraying method to form.In addition, can list and utilize the fiber assembly of meltblown spinning, fiber heat bonding each other before solidifying.In addition, can list the solvent that utilizes that utilizes the solvent bonding method to form fiber is solidified fiber assembly before each other.

In addition, preferably, what utilize that air (gas) fluid capacitance easily arranges fiber again is the fiber web that forms with the combing method that uses long fiber, and then, can list each other free degree height of fiber, only by the net before the heat bonding that forms that interweaves.In addition, utilizing a plurality of air (gas) stream to form slot part (concavo-convex) afterwards, in order to make its on-woven materialization with keeping its shape invariance, handle (heat treated) by utilizing predetermined heating device etc. to carry out heating furnace, the hot blast method that makes the thermoplastic fibre heat bonding that is included in the fiber assembly is preferred.

[5.1.2] fiber

As the fiber that constitutes fiber assembly (for example, constitute the fiber 101 of fiber web 100), for example, can list the fiber that the thermoplastic resins such as polyethylene terephthalate, nylon, polyamide of polypropylene, the modification of polyethylene with low density polyethylene (LDPE), highdensity polyethylene, straight chain shape, polypropylene, polyethylene terephthalate, modification constitute, use each resin or each resin compounded is got up separately.

Compound shape for example, can be enumerated the fusing point of the knockout composition core-sheath-type higher than the fusing point of sheath composition, the eccentric type of core sheath, the different arrange type arranged side by side of fusing point of left and right sides composition.In addition, also can be with abnormity or the three-dimensional crinkled fibres of hiding of crispaturaing or significantly crispaturaing such as hollow type, flat or Y type or C types, utilize that physical loads such as current or heat or embossing cut apart cut apart mixing such as fiber.

In addition, in order to form the three-dimensional shape of crispaturaing, the fiber of crispaturaing of significantly crispaturaing or hiding of regulation can be cooperated.Here, the so-called three-dimensional shape of crispaturaing, be helical form, word shape, Ω shape etc., fiber orientation is mainly towards in-plane, partly, fiber orientation is towards thickness direction.Whereby, since the buckling strength of fiber itself to the thickness direction effect, so even apply external pressure, its volume also is not easy to be collapsed routed.And then wherein, if spiral helicine shape, when external pressure was discharged, its shape can reinstatement, so, even since excessive external pressure make volume by conquassation some, after externally pressure discharges, the also original thickness of recovery easily.

The fiber of obviously crispaturaing is to crispatura by machinery to give shape, and perhaps core sheath structure is eccentric type, side by side the general name of the fiber of crispaturaing in advance such as arranges.The crinkled fibre of hiding is the fiber that can occur crispaturaing by heating.

Crispatura for machinery, can be poor, the fiber of heat, the pressurization continuous linearity after to spinning controls by the peripheral speed of linear velocity, the number of crispaturaing of per unit length is many more, can improve for the buckling strength under the external pressure more.For example, the number of rolling in 10 to 35/inch scope, more preferably, in 15 to 30/inch scope.

For utilizing thermal contraction to give for the shape, owing to constitute by the different plural resin of fusing point, when heating, because fusing point official post percent thermal shrinkage changes, so, be the fiber that so-called three-dimensional is crispaturaed.For the resin structure of fibre section, can list the eccentric type of core sheath structure, the different parallel type of fusing point of left and right sides composition.The percent thermal shrinkage of this fiber, for example, can be in 5% to 90% scope, more preferably in 10% to 80% scope.

The assay method of percent thermal shrinkage is made 200g/m for (1) with the fiber of 100% mensuration ²Net, (2) make the sample that is cut into 250 * 250mm size, (3) this sample was placed 5 minutes in the heating furnace of 145 ℃ (418.15K), (4) measure the length dimension after shrinking, and (5) can calculate percent thermal shrinkage by the length dimension difference before and after the thermal contraction.

In that this bondedfibre fabric is used as under the situation of surface patch, for example, consider the sensation that enters or touch skin of liquid, preferably, fiber number is in 1.1 to 8.8dtex scope.

This bondedfibre fabric is being used as under the situation of surface patch, as the fiber that constitutes fiber assembly, for example, for absorption of residual is stayed a small amount of menses on the skin or sweat etc., also can contain paper pulp, chemical pulp, artificial silk, the hydrophilic fibre of cellulose families such as acetate fibre, natural cotton.But, because cellulosic fibre is not easy to discharge the liquid that was once absorbing, so, for example, as preferred form, being that the scope of 0.1 quality % to 5 quality % is sneaked into respect to integral body.

Under the situation of utilizing this bondedfibre fabric as surface patch, for example, the entering of considering liquid reaches back wet (リ ウ エ Star ト バ Star Network), adds hydrophilizing agent or hydrophober etc. in the hydrophobicity synthetic fiber that also can enumerate in front or applies etc.In addition, also can carry out corona treatment or Cement Composite Treated by Plasma, give hydrophily.In addition, also can contain hydrophobic fiber.Here, so-called hydrophobic fiber refers to and carried out the fiber that known hydrophobic is handled.

In addition, in order to improve albefaction, for example, also can contain inorganic fillers such as titanium dioxide, barium sulfate, calcium carbonate.Under the situation of the composite fibre of core-sheath-type, can only in core, contain described inorganic filler, also can in sheath, contain described inorganic filler.

In addition, as previously described, utilize the fiber arranged again fiber web that is to use long fiber, utilizes combing method to form of air flow easily, in order to utilize a plurality of air flows to form after the slot parts (concavo-convexization) etc., make it the on-woven materialization with keeping its shape invariance, preferably utilize heating furnace to handle the hot blast method that (heat treated) makes the thermoplastic fibre heat bonding.As the fiber that is suitable for this method, for fiber intersection point hot adhesion each other, preferably use the fiber of core sheath structure, parallel construction, more preferably, with sheath each other easily reliably the fiber of the core sheath structure of hot adhesion constitute.Particularly, preferably, the core sheath composite fibre that uses the core sheath composite fibre that constitutes by polyethylene terephthalate and polyethylene or polypropylene and polyethylene to constitute.These fibers can individually or be used in combination of two or more.In addition, fibre length is 20 to 100mm, especially, is preferably 35 to 65mm.

[5.2] about the manufacturing installation of bondedfibre fabric

The fluid that [5.2.1] mainly is made of gas

According to the fluid that mainly constitutes of the present invention by gas, for example, can list the gas of adjusting to normal temperature or set point of temperature, perhaps contain the atomic aerosol of solid or liquid at this gas.

As gas, for example, can be air, nitrogen etc.In addition, gas also can contain the steam of the liquid of steam etc.

So-called aerosol refers to the material that is dispersed with liquid or solid in gas, below, enumerate its example.For example, can list and be dispersed with: the ink of painted usefulness; Improve the softeners such as silicone that flexibility is used; Prevent charged and the control hydrophily used of wettability or the activating agent of hydrophobicity; Inorganic fillers such as the titanium dioxide that the raising fluid energy is used, barium sulfate; When improving fluid energy, in heat treated, improve the powder adhesives such as polyethylene that concavo-convex shaping retentivity is used; Antihistaminics such as the bagodryl hydrochloride of antipruritic usefulness, thymol; Humectant; The material of bactericide etc.Here, solid also comprises gelatinous object.

Can suitably adjust mainly the temperature of the fluid that constitutes by gas.Can carry out suitable adjustment according to the shape of the character of the fiber that constitutes fiber assembly, the bondedfibre fabric that will make.

Here, for example, move rightly in order to make the fiber that constitutes fiber assembly, for the temperature of the fluid that mainly is made of gas, for increasing the free degree of the fiber that constitutes fiber assembly, higher to a certain extent temperature is preferred.In addition, in fiber assembly, comprise under the situation of thermoplastic fibre, can adjust to the temperature that to soften this thermoplastic fibre by the temperature of the fluid that will be mainly constitutes by gas, make the softening or fusion of thermoplastic fibre in the zone that is configured in mainly the fluid jet that constitutes by gas etc., simultaneously, make it underhardening again.

Whereby, for example,, keep the shape of bondedfibre fabric by spraying the fluid that mainly constitutes by gas.In addition, for example, when moving fiber assembly, give the intensity of this fiber assembly degree that (bondedfibre fabric) do not scatter in the travel mechanism that utilizes regulation.

Flow for the fluid that mainly is made of gas can suitably be adjusted.The object lesson that has the fiber assembly of the free degree as fiber each other, for example, can list and utilize highdensity polyethylene to constitute sheath, utilize polyethylene terephthalate to constitute core, with fibre length 20 to 100mm, be preferably 35 to 65mm, fiber number 1.1 is to 8.8dtex, being preferably 2.2 to 5.6dtex core sheath fiber is main body, utilize combing method to open fibre then fibre length is 20 to 100mm if use, be preferably 35 to 65mm fiber, if utilize the air bells laid method to open fibre then fibre length is 1 to 50mm, be preferably 3 to 20mm fiber, adjust to 10 to 1000g/m ², be preferably 15 to 100g/m ²Fiber web 100.Condition as the fluid that mainly constitutes by gas, for example, can list that (ejiction opening 913: diameter 0.1 is to 30mm in Fig. 8 or the ejection portion 910 that is formed with a plurality of ejiction openings 913 shown in Figure 9, be preferably 0.3 to 10mm, pitch 0.5 is to 20mm, be preferably 3 to 10mm, be shaped as just round, ellipse or rectangle) in, with air quantity be 3 to 50[L/ (minute holes)], be preferably 5 to 20[L/ (minute holes)] condition under to fiber web 100 15 to 300 ℃ of injection temperations (288.15K to 573.15K), be preferably the situation of the hot blast of 100 to 200 ℃ (373.15K to 473.15K).For example, spraying with above-mentioned condition under the situation of the fluid that mainly is made of gas, the fiber assembly that the fiber that is constituted can change its position, direction is suitable a kind of in the fiber assembly among the present invention.By utilizing this fiber, creating conditions and make, for example, can form the bondedfibre fabric shown in Fig. 1,2.The size of slot part 1, convex shaped part 2, weight per unit area can obtain in following scope.For slot part 1, thickness 0.05 to 10mm, be preferably in 0.1 to 5mm the scope, width 0.1 to 30mm, be preferably in 0.5 to 5mm the scope, weight per unit area 2 to 900g/m ², be preferably 10 to 90g/m ²Scope in.For convex shaped part 2, thickness 0.1 to 15mm, be preferably in 0.5 to 10mm the scope, width 0.5 to 30mm, be preferably in 1.0 to 10mm the scope, weight per unit area 5 to 1000g/m ², be preferably 10 to 100g/m ²Scope in.In addition, the interval with regulation in slot part 1 forms peristome 3, forms connecting portion 4 between peristome 3 and peristome 3.The size of peristome 3, connecting portion 4, weight per unit area can obtain in following scope.For connecting portion 4, thickness is identical or littler than convex shaped part 2 with convex shaped part 2, preferably 20% to 100%, particularly preferably in 40% to 70% scope in, width and length is 4 to 30mm, preferably in 5 to 10mm scope, weight per unit area 5 to 200g/m ², preferably 10 to 100g/m ²Scope in.For peristome 3, width and length 4 to 30mm, be preferably in 5 to 10mm the scope.In addition, although can in above-mentioned number range roughly, make bondedfibre fabric,, be not limited to this scope.

[5.2.2] aeration supporting member

As aeration supporting member 200, can list such supporting member: a side of supporting fiber web 100 is general plane shape or curved surface shape roughly, and simultaneously, general plane shape or roughly curved surface are general planar.As roughly plane or curved surface shape roughly, for example, can list tabular or cylindric.So-called in addition general planar shape, for example, it is concavo-convex etc. that the face itself that refers to the mounting fiber web 100 in supporting member does not form.Specifically, can list the supporting member that net in the netted supporting member 210 does not form concavo-convex grade.

As this aeration supporting member 200, for example, can list tabular supporting member or supporting member cylindraceous.Specifically, can list above-mentioned supporting member 240, supporting member 275.

Here, aeration supporting member 200 can removably be configured on the bondedfibre fabric manufacturing installation 90.Thereby, can suitably dispose aeration supporting member 200 corresponding to desirable bondedfibre fabric.In other words, in bondedfibre fabric manufacturing installation 90, aeration supporting member 200 can exchange with other aeration supporting member that chooses from different a plurality of aeration supporting members.

Regard to the mesh portion in the netted supporting member 240 shown in Figure 3 down, supporting member 275 shown in Figure 5 describes.Mesh portion as this aeration, for example, can list the silk that resins such as utilizing polyester, polyphenylene polyphenylene sulfide, nylon, conductive monofilaments forms, the perhaps silk that is formed by metals such as stainless steel, copper, aluminium etc. is by plain weave is knitted, twill weave, crowfoot satin, bilayer are knitted, spiral is knitted etc. inweaves aeration net etc.

Here, the venting quality of this aeration net for example, by partly making the method that inweaves, the rugosity of silk, the change of shape of silk, can partly make venting quality change.Particularly, can list the aeration screen cloth that the spiral made by polyester knits, flat filament and the circular wire of utilizing stainless steel to make carried out the aeration screen cloth that spiral is knitted.

In addition, can use tabular supporting member.For example, can list metal sleeves such as utilizing stainless steel, copper, aluminium.For sleeve, can list with above-mentioned metallic plate with the visuals of regulation dig through the sleeve of formation.The position that this metal is dug through becomes ventilating part, and the position that metal is not dug through becomes stuffiness portion.In addition, with recited above the same, in stuffiness portion, in order to improve the sliding on surface, its surface is preferably level and smooth.

As sleeve, for example, can list with the circular long rectangular shape of horizontal direction of length 3mm, width 40mm each turning is made, it is the sleeve of the stainless steel of 0.3mm that the arranged spaced that the hole portion that metal is dug through formation separates the interval of 2mm in processing line direction (moving direction), separate 3mm at width becomes latticed thickness.

In addition, can list hole portion is configured to staggered sleeve.For example, can list the hole portion that to dig through metal with the circle of diameter 4mm to be configured in processing line direction (moving direction) pitch be 12mm, be the sleeve of stainless steel of the staggered thickness 0.3mm of 6mm in the axial direction pitch.Like this, can set the figure (the hole portion of formation) or the configuration of digging through rightly.

And then, can list the aeration supporting member 200 of the fluctuating that is provided with regulation.For example, the position that can list the fluid that not direct injection mainly is made of gas alternately has the aeration supporting member of fluctuating (for example, wavy) to processing line direction (moving direction).By using the aeration supporting member 200 of such shape, for example, can obtain in the peristome that forms regulation, integrally on aeration supporting member 200, alternately to form the bondedfibre fabric of the shape of fluctuating (for example, wavy).

[5.2.3] injection equipment

For ejection portion 910,, for example, can suitably adjust the interval of the recess (slot part) in formation concavo-convex or the height of convex shaped part etc. by changing mainly the direction of the fluid that constitutes by gas.In addition, for example, the structure of the direction by automatically changing above-mentioned fluid for example, can suitably be adjusted, and slot part etc. is formed tortuous shape (wavy, word shape) or other shape.In addition, by adjusting mainly the spray volume or the ejection time of the fluid that constitutes by gas, can suitably adjust the shape of slot part or peristome or form figure.Mainly the fluid that is made of gas can be vertical to the spray angle of fiber web 100, in addition, also can be on the moving direction F of fiber web 100, with the regulation angle towards processing line direction as this moving direction F, also can with the regulation angle towards with processing line side in the opposite direction.

[5.2.4] heating arrangements

Method as 101 bondings of the fiber in the bondedfibre fabric 180 that makes the peristome that is formed with regulation, for example, can list the bonding of utilizing needle point method, jet net-spraying method, solvent bonding method to carry out, the hot adhesion that perhaps utilizes the sticking method of point, hot blast method to carry out, but, shape for the peristome that keeps formed regulation preferably adopts the hot blast method.In addition, for example, it is preferred utilizing the heat treatment in the hot blast method of heater portion 950.

[5.2.5] other

The bondedfibre fabric 115 that utilizes 950 heating of heater portion to make reaches conveyer 940 continuous on prescribed direction F by conveyer 930, for example, is transplanted on the operation, the coiling process that bondedfibre fabric 115 are cut into the regulation shape.Conveyer 940 is the same with conveyer 930, also can be equipped with band portion 949 and rotating part 941 etc.

Claims (15)

1. a bondedfibre fabric is the bondedfibre fabric with first direction and second direction, comprising:

A plurality of slot parts, described a plurality of slot parts are recessed in first lateral thickness direction of described bondedfibre fabric, form by a plurality of peristomes and a plurality of connecting portion,

A plurality of convex shaped parts, described a plurality of convex shaped parts are outstanding in described first lateral thickness direction, with mode adjacency along described a plurality of slot parts,

The average weight per unit area of described slot part is lower than the average weight per unit area of the integral body that comprises described slot part and described convex shaped part,

Described a plurality of peristome forms along aforementioned first direction,

Described a plurality of connecting portion is formed on the peristome of the regulation in aforementioned a plurality of peristome and between other peristome adjacent with the peristome of aforementioned regulation on the aforementioned first direction,

For aforementioned a plurality of connecting portions each, the containing ratio of the second direction orientation fibers that is orientated on aforementioned second direction is than the containing ratio height of the first direction orientation fibers that is orientated on aforementioned first direction, simultaneously,

At the fibre density at aforementioned connecting portion place each fibre density height than described convex shaped part,

The ratio of the length of the described second direction of each of described connecting portion and the length of described first direction is below 0.7.

2. bondedfibre fabric as claimed in claim 1 is characterized in that, for each of aforementioned peristome, at each the fiber of peripheral region of this peristome along each periphery orientation of this peristome.

3. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, each of aforementioned peristome is circular or substantially elliptical.

4. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, each of aforementioned peristome is in the ratio less than 1 of diameter on the aforementioned first direction and the diameter on aforementioned second direction.

5. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, the length of each of aforementioned peristome on aforementioned second direction is 4 to 30mm.

6. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, each of aforementioned slot part is each below 90% of height at the thickness direction of this bondedfibre fabric of aforementioned convex shaped part at the height of the thickness direction of this bondedfibre fabric.

7. bondedfibre fabric as claimed in claim 1 or 2, it is characterized in that, the slot part of the convex shaped part of the regulation in aforementioned a plurality of convex shaped part and regulation in aforementioned a plurality of slot parts and the convex shaped part adjacent with the convex shaped part of aforementioned regulation are compared, in the height difference of the thickness direction of this bondedfibre fabric.

8. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that the top of each of aforementioned convex shaped part is the general flat shape.

9. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, as with this bondedfibre fabric in second side of face of aforementioned first opposition side, form to the outstanding a plurality of outburst areas of the projected direction opposition side of aforementioned convex shaped part.

10. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, is wavyly to rise and fall on aforementioned first direction.

11. bondedfibre fabric as claimed in claim 9 is characterized in that, aforementioned second side in this bondedfibre fabric is general planar.

12. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, for the sidepiece in aforementioned a plurality of convex shaped parts, the containing ratio of aforementioned first direction orientation fibers is than the containing ratio height of aforementioned second direction orientation fibers.

13. bondedfibre fabric as claimed in claim 9 is characterized in that, for each of aforementioned convex shaped part, the spatial area rate of measuring from aforementioned first side is bigger than the spatial area rate of measuring from aforementioned second side of this bondedfibre fabric,

The aforesaid space area occupation ratio calculates as follows:

Spatial area rate (%)=(the space gross area (mm ²)/measurement range area (mm ²)) * 100

Here, the space gross area can be calculated by (multiplication factor during the space gross area during mensuration/mensuration), and in addition, the measurement range area can be calculated by (multiplication factor during the measurement range area during mensuration/mensuration).

14. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, the fibre density of each of aforementioned connecting portion is at 0.05g/cm ³More than.

15. bondedfibre fabric as claimed in claim 1 or 2 is characterized in that, the mixed with fibers that constitutes this bondedfibre fabric has hydrophobic fiber.

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