CN101674793A

CN101674793A - Surface sheet for absorptive article, method of producing the surface sheet, and absorptive article

Info

Publication number: CN101674793A
Application number: CN200880014091A
Authority: CN
Inventors: 三浦晴美; 田中聪; 横松弘行; 丰岛泰生
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2007-05-24
Filing date: 2008-05-12
Publication date: 2010-03-17
Anticipated expiration: 2028-05-12
Also published as: TW200904386A; CN101674793B; TWI451860B; WO2008146594A1

Abstract

A surface sheet (1) for an absorptive article is constructed by forming on a non-woven fabric (2) a front surface section (3) and a large number of liquid introduction depressions (4). The front surface section (3) has a front surface (31) coming into contact with a wearer's skin. The large number of liquid introduction depressions (4) each have a front surface (41) that is the depressed side andrear surface (42) that is the protruded side protruded toward an absorptive body. Each liquid introduction depression (4) has a peripheral wall section (43) and a bottom surface section (44). The bottom surface section (44) is located closer to the absorptive body than a rear surface (32) of the front surface section (3). The thickness (Ta) of the peripheral wall section (43) at a portion (A) adjacent to the bottom surface section (44) is less than the thickness (T1) of the front surface section (3).

Description

The face sheet of absorbent commodity, its manufacture method and absorbent commodity

Technical field

The present invention relates to the face sheet and the manufacture method thereof of absorbent commodities such as sanitary napkin, sanitary pad (panty liners), incontinence pad.

In addition, the invention still further relates to sanitary napkin, sanitary pad (panty liners), incontinence pad etc. and be used to absorb the absorbent commodity of maintenance from the liquid of health discharge.

Background technology

As the face sheet of sanitary napkin etc., known have a concavo-convex face sheet in the front.

For example have to the fabric sheet material of the nonwoven of the side-prominent three-dimensional perforate of single face (with reference to patent documentation 1).In the sheet material of patent documentation 1 record, around the hole, be formed with and utilize heat fibrous material to be solidified the cyclic consolidation zone that forms.The face sheet of patent documentation 1 record is when the projection with the point of front end stabs non-woven fabrics, and heating is positioned at the part around this projection, thereby forms three-dimensional perforate.

In addition, known have a fabric face sheet of nonwoven that has towards the outstanding three-dimensional perforate of absorber, as such face sheet with three-dimensional perforate, also known have a following face sheet: the thickness b of the sheet material of the roughly pars intermedia between the thickness c of the sheet material of the thickness a of the sheet material at the top between perforate and the lower end peripheral part of perforate and this top and this lower end peripheral part has the relation (with reference to patent documentation 2) of a＞b＞c.The face sheet of patent documentation 2 record heats when the projection with the point of front end stabs non-woven fabrics, thereby forms three-dimensional perforate.

In addition, following face sheet has been proposed: on the non-woven fabrics that makes the melt bonded formation of thermoplastic fibre, form the conduit recess and with the peripheral successive skin contact area of this conduit recess, at the bottom surface and the sidepiece of this conduit recess a plurality of drain breaches (with reference to patent documentation 3) are set.The face sheet of patent documentation 3 utilizes the low fiber degree of freedom (being easy to activeness) of non-woven fabrics, forms the drain breach when the conduit recess forms.

Patent documentation 1: Japanese kokai publication sho 62-125061 communique

Patent documentation 2: Japanese kokai publication hei 8-246321 communique

Patent documentation 3: Japanese kokai publication hei 4-58951 communique

In the above-mentioned face sheet in the past, the face sheet that has three-dimensional perforate as the sheet material of

patent documentation

1,2 exists the color of the menses that are absorbed bulk absorption etc. to see through perforate and can know the shortcoming of seeing from the outside when being used for sanitary napkin etc.In addition, because lower ending opening, three-dimensional shape collapses easily, and perhaps because poor from the regressive recovery of collapsed state, it is insufficient that resiliency is easy to become.In addition, in the sheet material of patent documentation 1 because the consolidation zone around the hole hinders the liquid due to the soaking in the sheet material to move, thus liquid from the poor mobility of sheet surface to absorber.

On the other hand, the face sheet of patent documentation 3 is owing to bottom and the sidepiece at the conduit recess is formed with the drain breach, so three-dimensional shape is easy to collapse.In addition, when the conduit recess forms, form the drain breach, therefore be difficult to be provided with the density gradient of fiber in the part except that the drain breach of conduit recess owing to utilize the low fiber degree of freedom (being easy to activeness) of non-woven fabrics.In addition, owing to having used the low non-woven fabrics of fiber degree of freedom (being easy to activeness) in order to form the drain breach, therefore become the sheet material of the flexibility difference of the part that contacts with skin, the skin sense of touch is bad.In addition, the face sheet of patent documentation 3 forms the drain breach when the conduit recess forms owing to utilized the low fiber degree of freedom (being easy to activeness) of non-woven fabrics, so the three-dimensional shape of conduit recess is easy to collapse, resiliency is also poor.

Summary of the invention

The invention provides a kind of face sheet of absorbent commodity, it forms by forming face portion and a plurality of drain recess, and the face side of described face portion contacts with skin, and the face side of described drain recess is concavity and rear side is side-prominent towards absorber; Wherein, above-mentioned drain recess has surrounding wall portion and bottom surface sections, and this bottom surface sections is positioned at than the back side of above-mentioned face portion more by absorbing the position on side, and the thickness with position this bottom surface sections adjacency this surrounding wall portion is littler than the thickness of above-mentioned face portion.(below, refer to this invention when claiming the 1st invention).

In addition, the present invention also provides a kind of manufacture method of face sheet, be used to make the face sheet with a plurality of recesses of absorbent commodity, wherein, the raw material sheet material supplied to the convex parts with a plurality of protuberances and have between the female member of a plurality of receiving orifices that insert for described protuberance, utilize raised part that described raw material sheet material partly is pressed in the above-mentioned receiving orifice and make it to be deformed into concavity, fix the deformed shape of this concavity by heating; In the described method, use non-woven fabrics as the above-mentioned raw materials sheet material, according to around the part of directly being pushed, forming annularly and the equal mode of discontiguous part of the inner surface of described protuberance and above-mentioned receiving orifice by the leading section of described protuberance, described raw material sheet material is pressed into described receiving orifice, fix the deformed shape of above-mentioned concavity simultaneously by heating, described fixedly following carrying out: insert in raised part under the state of above-mentioned receiving orifice, the inner surface of the receiving orifice of the front position that extends to described protuberance or the darker position of comparing is heated.(below, refer to this invention when claiming the 2nd invention)

In addition, the present invention also provides a kind of manufacture method of face sheet, be used to make face sheet with a plurality of recesses, wherein, to supply to convex parts by the raw material sheet material that fibrous material forms and have between the female member of a plurality of receiving orifices that insert for described protuberance with a plurality of protuberances, utilize raised part that described raw material sheet material partly is pressed in the above-mentioned receiving orifice and make it to be deformed into concavity, fix the deformed shape of this concavity by heating; In the described method, the inner surface near its peristome of above-mentioned receiving orifice is formed with the inclined plane, this inclined plane tilts according to the mode that departs from the centrage of described receiving orifice along with the deep side from the depth direction of this receiving orifice towards the peristome side, heat above-mentioned convex parts and above-mentioned female member, when utilizing described protuberance that described raw material sheet material partly is pressed into described receiving orifice, make the part corresponding described raw material sheet material with top above-mentioned face sheet not with above-mentioned convex parts state of contact under, fix the deformed shape of the concavity that is pressed into the part in the above-mentioned receiving orifice by heat.(below, refer to this invention when claiming the 3rd invention).

In addition, the present invention also provides a kind of absorbent commodity, and it possesses face sheet, the back-sheet of liquid permeability and is present in absorber between this two sheet material, and is essentially elongate shape; Above-mentioned face sheet is formed by non-woven fabrics, and described non-woven fabrics has the face portion that face side contacts with skin and has surrounding wall portion and bottom and towards the side-prominent a plurality of drain recesses of absorber; In the cross sectional view of absorbent commodity length direction, above-mentioned face sheet has high rigid portion near the boundary portion of above-mentioned face portion and above-mentioned surrounding wall portion or its, and the rigidity of this high rigid portion is than above-mentioned face portion and above-mentioned surrounding wall portion rigidity height separately.(below, refer to this invention when claiming the 4th invention).

In addition, the face sheet that the present invention also provides a kind of absorbent commodity to use, it is used for the skin contact surface of absorbent commodity; It is formed by non-woven fabrics, and this non-woven fabrics has the face portion that face side contacts with skin and has surrounding wall portion and bottom and towards the side-prominent a plurality of drain recesses of absorber; In the cross section of the fiber orientation directions of non-woven fabrics, near the boundary portion of above-mentioned face portion and above-mentioned surrounding wall portion or its, have high rigid portion, the rigidity of this high rigid portion is than above-mentioned face portion and above-mentioned surrounding wall portion rigidity height separately.(below, refer to this invention when claiming the 5th invention).

Description of drawings

Fig. 1 is the axonometric chart of the face sheet of the absorbent commodity of expression an embodiment of the invention.

Fig. 2 is the amplification sectional view of the part in the II-II line cross section of expression enlarged drawing 1.

The vertical view of Fig. 3 for face sheet shown in Figure 1 is observed from its face side.

The vertical view (figure that be equivalent to Fig. 3) of Fig. 4 for the face sheet of another embodiment of the present invention is observed from its face side.

Fig. 5 has the amplification plan view of bottom surface sections of an example of bottom surface sections of the fiber fixed part of part for expression.

Fig. 6 is the figure that is illustrated in the major part of the stretching that can preferably use in the manufacturing of face sheet of the present invention and heater.

Fig. 7 is the sectional view in the cross section (the III-III line cross section of Fig. 6) of the axial length direction of 1st and 2nd roller of expression in the device of Fig. 6.

The figure of the details of the protuberance of the protruding roller that uses in the manufacture method of Fig. 8 (a)～Fig. 8 (c) for expression the 1st embodiment and the recess (receiving orifice) of recessed roller.Fig. 8 (a) is the figure that is respectively the cross sectional shape of the opening shape of representing receiving orifice and the protuberance that inserts this receiving orifice along sectional view, Fig. 8 (b) and Fig. 8 (c) of the axial length direction of two rollers.

Fig. 9 (a) and Fig. 9 (b) are the figure of expression another embodiment of the present invention, and they represent the receiving orifice of female member respectively and insert this receiving orifice and reach the protuberance of the insertion state of depth capacity that it is and the suitable figure of 8 (a)

Figure 10 (a) and Figure 10 (b) are respectively the axonometric chart of the preferred protuberance of expression.

Figure 11 is the axonometric chart of an embodiment of the manufacture method of expression face sheet of the present invention.

Figure 12 is the figure of expression by an example of the face sheet of method manufacturing shown in Figure 11.

Figure 13 (a) and Figure 13 (b) are respectively the sectional view of face sheet shown in Figure 12, Figure 13 (a) amplifies the amplification sectional view of a part in the IV-IV line cross section of Figure 12 for expression, Figure 13 (b) amplifies the amplification sectional view of a part in the V-V line cross section of Figure 12 for expression.

Figure 14 is the amplification sectional view of the part in the IIA-IIA line cross section of omitting raw material sheet material face of land diagrammatic sketch 11 (along the cross section of the axial length direction of protruding roller and recessed roller).

Figure 15 is not for omitting the sectional view that the raw material sheet material face of land shows the cross section identical with Figure 14.

Figure 16 (a) is the sectional view (with the vertical sectional view of the projected direction of protuberance) of the receiving orifice of the protuberance of expression protruding roller shown in Figure 11 and recessed roller, Figure 16 (b) be with another embodiment with the suitable figure of Figure 16 (a).

Figure 17 (a) and Figure 17 (b) are the schematic section of expression another embodiment of the present invention, and they are respectively the receiving orifice of expression female member and insert this receiving orifice and reach the figure of protuberance of the insertion state of depth capacity.

Figure 18 is the schematic section of expression another embodiment of the invention, and it is the receiving orifice of expression female member and the figure of protuberance that inserts this receiving orifice and reach the insertion state of depth capacity.

Figure 19 is the schematic section of expression another embodiment of the invention, and it is the receiving orifice of expression female member and the figure of protuberance that inserts this receiving orifice and reach the insertion state of depth capacity.

Figure 20 is the schematic section of expression another embodiment of the invention, and it is the receiving orifice of expression female member and the figure of protuberance that inserts this receiving orifice and reach the insertion state of depth capacity.

Figure 21 is the figure (figure suitable with Figure 15) of expression another embodiment of the invention.

Figure 22 cuts off axonometric chart for expression as the part of the sanitary napkin of an embodiment of absorbent commodity of the present invention.

Figure 23 is the axonometric chart that the part of the face sheet of the sanitary napkin of Figure 22 is amplified expression.

Figure 24 (a) is the amplification sectional view that the part in the IB-IB line cross section of Figure 23 is amplified expression, and Figure 24 (b) is the amplification sectional view that the part in the IIB-IIB line cross section of Figure 23 is amplified expression.

The expansion vertical view of Figure 25 for face sheet shown in Figure 23 is observed from its face side.

Figure 26 is the vertical view (figure suitable with Figure 25) that the face sheet of another embodiment of the present invention is observed from its face side.

The figure of the stretching that can preferably use in the manufacturing of Figure 27 for the face sheet of expression Figure 23 and the major part of heater.

Figure 28 is the sectional view of expression with the vertical cross section of axial length direction (the IIIB-IIIB line cross section of Figure 27) of the 1st and the 2nd roller of the device of Figure 27.

Figure 29 is the sectional view of expression along the cross section (the IVB-IVB line cross section of Figure 27) of the axial length direction of the 1st and the 2nd roller of the device of Figure 27.

The specific embodiment

The present invention will be described based on the preferred embodiment of the present invention and with reference to accompanying drawing below.

Face sheet (hereinafter referred to as face sheet) 1 as the absorbent commodity of one embodiment of the present invention, as Fig. 1～shown in Figure 3, it is by forming on non-woven fabrics 2 that face portion 3 that positive 31 sides contact with skin and positive 41 sides are concavity and the back side 42 side direction the side-prominent a plurality of

drain recesses

4,4 of absorber ... form.

As non-woven fabrics 2, can use the various non-woven fabrics that in the past in the face sheet of absorbent commodity, used, for example hot blast method non-woven fabrics, air lay method non-woven fabrics, jet net-spraying method non-woven fabrics, needle point method non-woven fabrics etc. with being not particularly limited.Wherein, preferred hot blast method non-woven fabrics.Hot blast method non-woven fabrics is will carry out non-woven fabricsization by the hot blast processing of adopting the hot blast method by the fleece that combing method or air-flow method form to obtain.

The front 31 of face portion 3 and the front of drain recess 4 41 for when being assembled into absorbent commodity 1 towards a face of the face sheet 1 of the skin side of wearer, the back side 32 of face portion 3 and the back side of drain recess 4 42 for when being assembled into absorbent commodity towards another face of the face sheet 1 of a side (absorption side) opposite with the skin side of wearer.

From the viewpoint of the drain recess of the excellent in stability that forms three-dimensional shape, the preferred hot-melt-bondable fiber of the formation fiber of non-woven fabrics 2, the fiber that particularly forms by thermoplastic, polymeric materials.As thermoplastic, polymeric materials, can list polyester such as polyolefin such as polyethylene or polypropylene, polyethylene terephthalate, polyamide etc.In addition, the also preferred composite fibres such as the core-sheath-type that is combined to form by these thermoplastic, polymeric materials or parallel type that use.These fibers may be used alone in combination of one kind or two or more kinds.

Also can containing paper pulp fiber etc. beyond the melt bonded property of the non-woven fabrics 2 heat extractions fiber, not have the fiber of hot-melt-bondable or a fusing point high and do not have the fiber (for example fusing point is than the high fiber more than 20 ℃ of treatment temperature) of hot-melt-bondable in fact.In total formation fiber of non-woven fabrics, the ratio of hot-melt-bondable fiber (is benchmark with weight) is preferably 50～100%, more preferably 80～100%, is preferably 100% especially.In addition, the hot-melt-bondable fiber in the non-woven fabrics 2 is preferably the fiber through hydrophilicity-imparting treatment.

Face sheet 1 is when being assembled into absorbent commodity and being used, and the front 31 of the part except that drain recess 4 contacts with the skin of wearer.Like this, face portion 3 is parts that positive 31 sides contact with the skin of wearer.In face sheet 1, face portion 3 forms around each drain recess 4 continuously.In addition, face portion 3 forms the general planar shape as depicted in figs. 1 and 2.

Face sheet 1 forms according to the mode side-prominent from face portion 3 towards absorber respectively owing to a plurality of drain recesses 4, therefore compare with the face sheet that has towards the side-prominent a plurality of independent protuberances of skin, the liquid that flows through on skin can be inhaled in the face sheet 1 quickly.Therefore, can prevent the rough sledding of liquid due on skin, flowing through effectively, for example take place from fluid seepage of absorbent commodity etc.

As shown in Figure 2, front 41 sides of drain recess 4 be concavity and the back side 42 side direction absorption side (lower side of Fig. 2) outstanding.In addition, drain recess 4 has surrounding wall portion 43 and bottom surface sections 44.In addition, bottom surface sections 44 is positioned at than the back side 32 of face portion 3 more by absorbing the position on side.That is, bottom surface sections 44 is positioned at position than the back side 32 of face portion 3 more by absorbing the position on side (lower side of Fig. 2) on the thickness direction Z of face sheet 1 (with reference to Fig. 2).

Surrounding wall portion 43 tilts with respect to the vertical line that extends on the thickness direction of face sheet 1, and the area of the cross section of the part of being surrounded by this this surrounding wall portion 43 of face sheet 1 (cross section that is formed by the plane perpendicular to the thickness direction of face sheet 1) bottom surface sections 44 from face portion 3 side direction and reduced gradually.More specifically, inner surface configuration is roughly rounding frustum.

Bottom surface sections 44 is overlooked and is roughly circle, and surrounding wall portion 43 is continuous around it.Bottom surface sections 44 in the present embodiment forms the general planar shape, but also can form the protruding circular-arc convex curve surface shape in cross section downwards.

In the drain recess 4 in the present embodiment, the thickness T a with positions bottom surface sections 44 adjacency (position of representing with symbol A among Fig. 2 below is also referred to as bottom surface sections in abutting connection with position A) surrounding wall portion 43 is littler than the thickness T 1 of face portion 3.Therefore, bottom surface sections is in abutting connection with the fibre density of the non-woven fabrics of the position A fibre density height than the non-woven fabrics of face portion 3.Like this, in abutting connection with the difference (gradient) that has fibre density between the A of position, in face portion 3 and/or surrounding wall portion 43, the liquid that is inhaled in the face sheet 1 is easy to move in abutting connection with position A to bottom surface sections by face portion 3 and bottom surface sections.When being configured in face sheet 1 on the absorber, bottom surface sections contacts with this absorber or approaching in abutting connection with position A, from here on for liquid taking place naturally to position that absorber moves.Like this, drain recess 4 has the function that the liquid in face portion 3 and/or surrounding wall portion 43 suctions is guided to absorber.

Like this, the face sheet of present embodiment 1 is because bottom surface sections is littler than the thickness T 1 of face portion 3 in abutting connection with the thickness T a of position A, therefore excellence aspect the mobility that moves to absorber at liquid.

And as mentioned above, the face sheet 1 of present embodiment is because drain recess 4 has bottom surface sections 44, and the lower end of drain recess 4 is opening not, so form stable of drain recess 4, even the thickness direction to face sheet 1 in absorbent commodity is dressed applies compression stress, this drain recess 4 also is difficult to collapse, even perhaps collapse, and also excellence aspect the recuperability when compression stress discharges.Therefore, become and have comfort cushioning and the good face sheet of feel.

In addition, because drain recess 4 has bottom surface sections 44, the liquid that moves to absorber is covered by this bottom surface sections 44, therefore for example when being used for the face sheet of sanitary napkin, can prevent the eye-catching defective of menses in the sanitary towel after use.

From improving the ambulant viewpoint that liquid moves to absorber, bottom surface sections be preferably in abutting connection with the thickness T a of position A face portion 3 thickness T 1 3～80%, be preferably 5～50% especially.In addition, above-mentioned thickness T 1 is preferably 0.4～2.5mm, and above-mentioned thickness T a is preferably 0.1～0.4mm.

In addition, as shown in Figure 2, measure the thickness T 1 of face portion 3 in the substantial middle portion of 4 of adjacent drain recesses.In addition, as shown in Figure 2, bottom surface sections constitutes the thickness of the non-woven fabrics of drain recess 4 at A place, this position in abutting connection with the thickness T a of position A.

In addition, as shown in Figure 2, the thickness of the surrounding wall portion 43 of the drain recess 4 in the present embodiment bottom surface sections 44 sides from face portion 3 side direction and is reduced gradually, and thus, the fibre density of the non-woven fabrics of formation surrounding wall portion 43 bottom surface sections 44 sides from face portion 3 side direction to be increased gradually.

Therefore, the mobility that liquid moves in abutting connection with position A to bottom surface sections from face portion 3 and/or surrounding wall portion 43, and then liquid is excellent more to the mobility that absorber moves.

From improving the ambulant viewpoint that liquid moves to absorber, the bottom surface sections in week facial 43 is preferably this surrounding wall portion 43 the and (position of representing with symbol B among Fig. 2, position face portion 3 adjacency in abutting connection with the thickness T a of position A, below be also referred to as face portion in abutting connection with position B) thickness T b 5～80%, more preferably 5～50%.In addition, as shown in Figure 2, face portion constitutes the thickness of the non-woven fabrics of drain recess 4 at B place, this position in abutting connection with the thickness T b of position B.

In addition, the face portion of the drain recess 4 in the face sheet 1 of present embodiment is littler than the thickness T 1 of above-mentioned face portion 3 in abutting connection with the thickness T b of position B.Thus, liquid is excellent more to the mobility that surrounding wall portion 43 moves from face portion 3, and liquid is excellent more to the mobility that absorber moves.From improving the ambulant viewpoint that liquid moves to surrounding wall portion 43 from face portion 3, face portion be preferably in abutting connection with the thickness T b of position B face portion 3 above-mentioned thickness T 1 20～90%, be preferably 40～90% especially.

Above-mentioned thickness T 1, Ta, Tb are the thickness under the no loading, for example try to achieve from the microphotograph of taking the cross section.The thickness T of face sheet described later too.

Non-woven fabrics 2 in the bottom surface sections 44 preferably has the binding site of fiber and fiber and keeps the liquid permeability.Utilize the binding site that exists between the fiber, can be in the stability-enhanced while of the three-dimensional shape that makes drain recess 4, the liquid permeability of face sheet is improved, and then the deterioration of skin sense of touch such as can prevent filming the time.The binding site of fiber and fiber does not comprise through the part of filming or by the embossing processing part that pressurization forms to non-woven fabrics.The binding site of fiber and fiber handles to make preferably that heat fusing is bonding between the fiber forms on the intersection point between the fiber by the hot blast that adopts the hot blast method.

As shown in Figure 3, drain recess 4 in the face sheet 1 of present embodiment is configured to staggered, and configuration in the following manner: face portion 3 the fiber orientation directions (directions X among the figure) of non-woven fabrics 2 and with this two direction of the vertical direction of fiber orientation directions (Y direction among the figure) on do not exist with successive rectilinear form.

Do not exist on directions X or Y direction by face portion 3, can dispose most drain recesses 4, and can reduce the area of the face portion 3 that contacts with skin with successive rectilinear form.Thus, can suppress being clamminess of skin, and then compare, can further make the liquid that infiltrates between skin and the face portion 3 be difficult to seepage with the form of continuous linearity.

Relative therewith, Fig. 4 goes up the figure of the embodiment of continuous linearity ground existence for expression face portion 3 in the fiber orientation directions (directions X among the figure) of non-woven fabrics 2 with the vertical direction of fibre orientation (Y direction among the figure).In Fig. 4, along straight line LY, face portion 3 continuous linearity ground extend, and along straight line LX face portion 3 also linearity ground extension continuously.

Face sheet 1 preferably makes fiber orientation directions (directions X among the figure) and as one man is assembled into this absorbent commodity with the either direction of the vertical direction of fiber orientation directions (Y direction among the figure) and the length direction of absorbent commodity, be assembled under the state of this absorbent commodity, on the length direction at least of this absorbent commodity, face portion 3 is not existed with successive rectilinear form, like this, can be increased in the interval of the drain recess of arranging on the straight line of fiber orientation directions 4, this is from can be so that the thickness of the face portion 3 between the drain recess 4 that this straight line is arranged is more thickeied and softish viewpoint is more preferably.

As shown in Figure 5, the non-woven fabrics 2 at bottom surface sections 44 places of drain recess 4 preferably has the fiber fixed part 45 ' except that the binding site of fiber and fiber.Fiber fixed part 45 ' is compared with other parts (whole in bottom surface sections is the part that is meant the more lateral under the situation of fiber fixed part 45 ') of bottom surface sections 44, fiber (comprising the fiber that has carried out filming and do not kept fiber form) exists densely, it is preferably the part embossed portion that non-woven fabrics is partly heated and pressurizes and form by embossing processing for these fiber one being changed into whole part.Embossed portion described here also comprises by embossing processing carries out the part that filming forms.

Part 46 ' except that the fiber fixed part 45 ' of bottom surface sections 44 can be made of the non-woven fabrics of the binding site that does not have fiber and fiber, also can be made of the non-woven fabrics of the binding site with fiber and fiber.And then integral body that also can bottom surface sections 44 is fiber fixed part 45 '.

Because bottom surface sections 44 has fiber fixed part 45 ', fiber is become by the liquid in densification, the absorber and is difficult to see.Can also improve the rigidity of bottom surface sections 44, even face sheet 1 is applied the compression stress of thickness direction, this drain recess 4 also is difficult to collapse.

Particularly fiber fixed part 45 ' partly forms in bottom surface sections 44, and this be from can obtaining the liquid permeability of appropriateness, and can make and have low-density portion and high density portion in the bottom surface sections 44, and liquid is easy to set out to the viewpoint that absorber moves, and is preferred.

From viewpoints such as the stability of the form that improves drain recess 4 and resiliencies, face sheet 1 preferably has following formation.The face sheet of other embodiments too.

Weight per unit area is preferably 15～50g/m ², be preferably 20～40g/m especially ², the fiber number that constitutes fiber is preferably 1.2～6.7dtex.

The diameter W1 of the peristome of face portion 3 sides is (with reference to Fig. 2, at opening shape is for diameter of a circle of the same area under the non-circular situation) be preferably 2.0～7.0mm, the diameter W2 of bottom surface sections 44 (with reference to Fig. 2, being diameter of a circle of the same area under non-circular situation) is preferably 0.5～2.5mm.

The thickness T of face sheet 1 (with reference to Fig. 2) is preferably 0.5～3.0mm, is preferably 20～90% with respect to the ratio of the thickness T 1 of the face portion of this thickness T, is preferably 40～90% especially.

In addition, preferred every 9cm ²The number of the drain recess 4 of face sheet is about 10～100, more preferably about 20～70.

In the preferred manufacture method of face sheet 1, as shown in Figure 6, on the raw material sheet material 20 that forms by non-woven fabrics, form a plurality of

drain recesses

4,4 with pair of

rolls

5,6 ... thereby, obtain face sheet 1.The preferred hot blast method of non-woven fabrics non-woven fabrics as raw material sheet material 20.Hot blast method non-woven fabrics has the extensibility (the distortion degree of freedom of fibre structure) of appropriateness, and has the binding site of fiber and fiber, even make it elongation thus, fiber also is difficult to become scattered, therefore is suitable for forming the drain recess 4 of form stable.

In manufacture method shown in Figure 6, in the formation of drain recess 4, use to possess to have the 1st roller 5 (below be also referred to as protruding roller) of a plurality of protuberances 51 and have the stretching and the heater of the 2nd roller 6 corresponding to a plurality of recesses 61 of protuberance 51 (below be also referred to as recessed roller) at periphery at periphery.

The 1st roller 5 and the 2nd roller 6 in this device constitute in the following manner: they by side by side in Fig. 6 the direction shown in the arrow drive rotation, along with the rotation of two

rollers

5,6, each protuberance 51 inserts in (pine is slotting) corresponding concave part 61 successively.The protuberance 51 that inserts in the recess 61 does not contact on every side with the inner surface of this recess 61.

In addition, in example shown in Figure 6, protuberance 51 is cylindric, recess 61 be its internal diameter than the diameter of protuberance 51 big the round-ended cylinder shape arranged.

As shown in Figure 6, when between the 1st and the

2nd roller

5,6 of rotation, importing the raw material sheet material 20 that forms by non-woven fabrics, as shown in Figure 7, under the part except that the recess 61 of the 2nd roller 6 and back side state of contact, this raw material sheet material 20 is pressed into the position conveyance by protuberance 51 to recess 61, be pressed into the position at this, this recess 61 is pushed and be pressed into to the part that is positioned at this recess 61 by protuberance 51.

In the process that this is pressed into, around part 24 that the leading section with protuberance 51 of raw material sheet material 20 contacts and directly pushed, exist and protuberance 51 and all discontiguous part 23 of recess 61, this part 23 is compared biglyyer with other parts and is extended.

Then, from the inner surface of recess 61 the above-mentioned part 23 under the elongation state is applied heat, by this heat, its elongation state is fixed (heat fixation), thereby forms constitutionally stable drain recess 4.

Like this, can access the face sheet 1 that is formed with a plurality of drain recesses 4 a plurality ofly.In the face sheet 1 that obtains, bottom surface sections 44 mainly is made of the part 24 of directly being pushed by the leading section of protuberance 51, and surrounding wall portion 43 mainly is made of above-mentioned part 23.

The following describes the embodiment manufacture method of the 1st embodiment (below be also referred to as) of manufacture method of the face sheet of the 2nd invention.

In the manufacture method of the 1st embodiment, as shown in Figure 6 and Figure 7, with raw material sheet material 20 supply to possess protruding roller (convex parts) 5 with a plurality of protuberances 51 and have the stretching of recessed roller (female member) 6 of a plurality of recesses 61 of inserting for protuberance 51 (below be also referred to as receiving orifice 61) and two

rollers

5,6 of heater between, utilize protuberance 51 that raw material sheet material 20 partly is pressed into receiving orifice 61 and makes it to be deformed into concavity, fix the deformed shape of this concavity by heating, thereby make face sheet with a plurality of recesses.

As convex parts of the present invention and female member, also can use the parts that on flat board, are formed with protuberance and recess, but in the present embodiment, as shown in Figure 6, use has the protruding roller 5 of a plurality of protuberances 51 and the recessed roller 6 that has a plurality of receiving orifices 61 and rotate with these protruding roller 5 interlocks at periphery at periphery.Convex parts and female member are that the roller shape is preferred from viewpoints such as productivity ratio.In addition, protruding roller 5 can be realized by known bindiny mechanism such as for example gear or chain etc. with the interlock rotation of recessed roller 6.

Face sheet 1 illustrated in figures 1 and 2 is following formation: by above-mentioned protruding roller 5 and recessed roller 6, on the raw material sheet material 20 that forms by non-woven fabrics, form the face portion 3 that positive 31 sides contact with skin and positive 41 sides are concavity and the back side 42 side direction the side-prominent a plurality of recesses of

absorber

4,4 ...

Recess 4 and has the liquid that will suck from positive 31, the 41 sides function to the absorber guiding when the apparent thickness T that makes face sheet 1 increases.

Non-woven fabrics as raw material sheet material 20 can list various known non-woven fabrics, for example hot blast method non-woven fabrics, air lay method non-woven fabrics, jet net-spraying method non-woven fabrics, needle point method non-woven fabrics etc.

Wherein, hot blast method non-woven fabrics preferably.Hot blast method non-woven fabrics has the extensibility of appropriateness, and has the binding site of fiber and fiber, even make it elongation thus, fiber also is difficult to become scattered, therefore can easily form the recess 4 of spatial form stable.Relative therewith, do not form the air lay method non-woven fabrics of the binding site of fiber and fiber, because elongation, it is scattered that fiber becomes easily, is difficult to form the recess 4 of form stable, and the low spun bond nonwoven fabric of fiber degree of freedom (being easy to activeness) is difficult to elongation, therefore be difficult to form recess 4 with degree of depth, in addition, when recess forms, produce breach etc., thereby be difficult to form the recess 4 of form stable.

Hot blast method non-woven fabrics can carry out non-woven fabricsization by the fleece that will form by combing method or the air-flow method hot blast processing by adopting the hot blast method etc. and obtain, and fleece is preferably the fleece that utilizes combing method to form.

In the present invention, hot blast method non-woven fabrics also comprises between the hot blast method non-woven fabrics or duplexer that hot blast method non-woven fabrics and other non-woven fabrics form except the hot blast method non-woven fabrics of monolayer.

When using duplexer as hot blast method non-woven fabrics, interlayer preferably partly or integrally engages by embossing processing known joint methods such as (heat embossing, ultrasonic wave embossed, high frequency embossing etc.).

From the viewpoint of the recess that forms the three-dimensional shape excellent in stability, the formation fiber of the non-woven fabrics that uses as the raw material sheet material, preferred hot-melt-bondable fiber, the especially preferably fiber that forms by thermoplastic, polymeric materials.As thermoplastic, polymeric materials, can list polyester such as polyolefin such as polyethylene or polypropylene, polyethylene terephthalate, polyamide etc.In addition, also preferred the use by composite fibres such as the core-sheath-type that is combined to form of these thermoplastic, polymeric materials or parallel types.These fibers may be used alone in combination of one kind or two or more kinds.Beyond the melt bonded property of the heat extraction fiber, non-woven fabrics also can contain fiber or the high fiber that does not have hot-melt-bondable in fact (for example fusing point is than the high fiber more than 20 ℃ of treatment temperature) of fusing point that paper pulp fiber etc. does not have hot-melt-bondable.In total formation fiber of non-woven fabrics, the ratio of hot-melt-bondable fiber (is benchmark with weight) is preferably 50～100%, and more preferably 80～100%, be preferably 100% especially.In addition, the hot-melt-bondable fiber in the non-woven fabrics is preferably the fiber through hydrophilicity-imparting treatment.

In the present embodiment, as shown in Figure 6, zonal raw material sheet material 20 is supplied to continuously along between the pair of

rolls

5,6 of the interlock of the direction shown in arrow rotation.Two

rollers

5,6 constitute in the following manner: be accompanied by the rotation of two

rollers

5,6, the protuberance 51 of protruding roller in turn inserts in (pine inserts) receiving orifice 61.The protuberance 51 that is inserted in the receiving orifice 61 does not contact on every side with the inner surface of this receiving orifice 61.

The protruding roller 5 following formation of using in the present embodiment: a plurality of protuberances 51 with predetermined distance the protuberance that constitutes of forming a line be listed as along the axial length direction of this roller and extends, and this protuberance is listed in the circumferencial direction of roller 5 with the formation of predetermined distance multiple row ground.Each protuberance that constitutes each protuberance row is formed at and is staggering on the position of half interval with each protuberances of the protuberance row of adjacency on the roll shaft length direction.The receiving orifice 61 of recessed roller 6 disposes too.In the example of Fig. 6～shown in Figure 8, protuberance 51 is for to have the shape of the front end face of general planar at the front end of columned axial region, and receiving orifice 6 has internal diameter the inner surface that round-ended cylinder shape arranged bigger than the diameter of protuberance 51.

As shown in Figure 6, when raw material sheet material 20 importings that will be formed by non-woven fabrics link between two

rollers

5,6 that rotate, as shown in Figure 7, under the part except that the receiving orifice 61 of recessed roller 6 and back side state of contact, this raw material sheet material 20 by protuberance 51 conveyances to the position that is pressed into of receiving orifice 61, be pressed in the position at this, this receiving orifice 61 is pushed and be pressed into to the part that is positioned at this receiving orifice 61 by protuberance 51.

Above-mentionedly be pressed into following carrying out: around part 24 that the raw material sheet material 20 and the leading section of protuberance 51 contact and directly pushed, produce all discontiguous part 23 of

inner surface

61a, 61b annularly with protuberance 51 and receiving orifice 61.In the process that this is pressed into, be that center raw material sheet material extends widely with above-mentioned part 23, the part of this raw material sheet material is pressed in the receiving orifice 61, and bulged-in part is deformed into concavity.

Protuberance 51 and receiving orifice 61 are respectively in advance with the heating such as known heater that are assembled into convex parts and female member, inner surface 61a from this receiving

orifice

61,61b applies heat to the part that is pressed in the receiving orifice 61 and is deformed into concavity of raw material sheet material 20, and the deformed shape of its concavity is fixed (heat fixation).

Because the receiving orifice 61 of female member be a concavity, it is hot therefore to be difficult to radiation, and its temperature is in fact than the planar portions height of the female member except that receiving orifice 61.Therefore, the raw material sheet material 20 that is imported into receiving orifice 61 is by heat fixation, and the planar portions of female member is difficult to by heat fixation.And then, because the sealing of the bottom surface of receiving orifice 61 become the high more state of surface temperature more on earth, thereby raw material sheet material 20 is fixed more strongly more near the protuberance 51 of convex parts more.

In addition, as preferred manufacture method, by only the top layer of the planar portions of female member being carried out heat insulation coating and controlled the surface temperature of female member better, thereby make and raw material sheet material 20 be difficult to be stabilized the ground heat fixation with the corresponding zone of planar portions female member.As heat insulation coating material, can list the epoxy resin that is mixed with glass fibre, phenolic resins, polyether-ether-ketone (PEEK) material, ceramic material, silicon resinoid, Teflon (registered trade mark) resin etc.

The heating-up temperature of protuberance 51 and receiving orifice 61 can also further improve formability and flexibility (surface sense of touch) except that above-mentioned effect, therefore preferably make the temperature of inner surface of receiving orifice 61 higher about 0～40 ℃ than the temperature of protuberance 51.In addition, the temperature of receiving orifice 61 inner surfacies is preferably about 80～160 ℃, if the fusing point of hot-melt-bondable fiber contained in the non-woven fabrics (fusing point that refers to low-melting composition under the situation of composite fibre) is set at A ℃, then the temperature of receiving orifice 61 inner surfacies is preferably below the A-50 ℃～A+40 ℃.

When raw material sheet material 20 is pressed into receiving orifice 61 and to the part that is pressed into, heating, if produce all discontiguous part 23 of

inner surface

61a, 61b in advance with protuberance 51 and receiving orifice 61, then this part 23 can not produce that mechanical strength significantly reduces owing to elongation or the situation of breach etc. under stretched widely, and this state is stabilized fixing (heat fixation).

According to present embodiment, like this, can easily make face sheet 1 with recess 4.

The recess 4 of the face sheet 1 that obtains is kept mechanical strength, do not form aperture portion and is not also had breach etc. owing to its surrounding wall portion 43, therefore when in absorbent commodity is dressed, face sheet 1 being applied the compression stress of thickness direction, this recess 4 is difficult to collapse, even perhaps collapse, the recuperability of three-dimensional shape was also excellent when compression stress discharged.Therefore, become and have comfort cushioning and the good face sheet of feel.

In addition, because recess 4 has bottom 44 and lower end opening not, the liquid that moves to absorber is covered by this bottom 44, therefore, for example the time, can prevent the eye-catching shortcoming of color of liquid such as menses in the sanitary towel after use as the face sheet of sanitary napkin etc.

Preferably the entire circumference at receiving orifice 61 inner surfacies produces this state annularly.That is, the entire circumference that preferably spreads all over the part of directly being pushed by the leading section of protuberance 51 with all discontiguous above-mentioned part 23 of inner surface 61a, the 61b of protuberance 51 and receiving orifice 61 generates annularly.

Convex component side for raw material sheet material 20, owing to do not contact with raw material sheet material 20 but be subjected to appropriate heat in that the planar portions (with the part except that protuberance 51 of female member face in opposite directions) of convex parts is direct, therefore loft is replied, and fibre density has the tendency of step-down.On the other hand, for the female member side of raw material sheet material 20, owing to be and the direct state of contact of the planar portions of female member, therefore comparing fibre density with the convex component side is easy to become high state.

When raw material sheet material 20 is pressed into receiving orifice 61, in order to produce all discontiguous above-mentioned part 23 with inner surface 61a, the 61b of protuberance 51 and receiving orifice 61, as shown in Figure 8, preferably insert under the state of receiving orifices 61 at protuberance 51, with the beeline L1 between the open circumferential portion 62 of this protuberance 51 and this receiving orifice 61 be set at the relation of the thickness of raw material sheet material 20 in setting more than.

For example used thickness is described less than the non-woven fabrics of the 3mm situation as raw material sheet material 20, preferred above-mentioned beeline L1 is more than the 0.7mm, and 0.7～3.0mm more preferably is more preferably more than the 1.0mm.

In addition, from accessing the angle of recess 4 that is difficult to collapse and has the recuperability of three-dimensional shape, insert under the state of receiving orifice 61 at protuberance 51, the longest distance L2 between the open circumferential portion 62 of protuberance 51 and receiving orifice 61 is preferably below the 4.0mm, is preferably below the 3.0mm especially.

In addition, angle from the thickness of keeping face portion 3, insert under the state of receiving orifice 61 at protuberance 51, the spacing distance L3 between the forward surface of face 63 around the receiving orifice 61 of female member 6 and above-mentioned convex parts 5 is preferably more than the 1mm, is preferably more than the 3mm especially.

In addition, from obtaining more spatial recess 4 and preventing bottom surface sections 44 disruptive angles, insert under the state of receiving orifices 61 at protuberance 51, the insertion depth L4 of protuberance 51 is preferably 0.5～6.0mm, is preferably 1.0～4.0mm especially.

The insertion depth L4 of protuberance 51 is along with the rotation of protruding roller 5 and recessed roller 6 little by little changes, the state when " protuberance 51 inserts the states of receiving orifices 61 " under the situation of given size etc. is defined as insertion depth L4 and reaches maximum.

As in the present embodiment, using under protruding roller 5 and the situation of recessed roller 6 as convex parts and female member, shown in Fig. 8 (c), the opening shape of receiving orifice 61 is preferably the shape that recessed roller 6 is grown at the length L X ' of axial length direction than this recessed roller 6 at the length L Y ' of circumferencial direction.Preferably will for example be set at 1.2/1～6/1 with respect to the ratio of the length L Y ' of the circumferencial direction of the length L X ' of axial length direction (LY '/LX ').

In the present embodiment, being pressed in the receiving orifice 61 of raw material sheet material 20 and be deformed into the fixing following of described deformed shape that the part of concavity undertaken by heating and carry out: as shown in Figure 8, insert at protuberance 51 under the state of receiving orifices 61, inner surface 61a, the 61b of the receiving orifice 61 that extends to the position darker than the front position P1 of this protuberance heated.

That is, protruding

roller

5 and 6 rotations of recessed roller, when the insertion depth L4 of protuberance 51 reached maximum, inner surface 61a, the 61b of receiving orifice 61 existed to the position darker than the front position P1 of this protuberance 51.

Thus, utilize in the receiving orifice 61 around the heat that discharges and the heat of protuberance 51, can on the non-woven fabrics that is pressed into by protuberance 51, form stable recess 4.

The receiving orifice 61 of the female member of using in the present embodiment 6 has all facial 61a and bottom 61b, but the receiving orifice 61 of female member 6 also can be shown in Fig. 9 (a) and Fig. 9 (b) like that, have all facial 61a and do not have the receiving orifice of bottom 61b.Under the situation that does not have bottom 61b, shown in Fig. 9 (b), the front position P1 of protuberance 51 also can be consistent with the lower end position of the inner surface 61a of receiving orifice 61, even under the situation that does not have bottom 61b, shown in Fig. 9 (a), the inner surface 61a of receiving orifice 61 extends to the position darker than the front position P1 of protuberance 51, so heats, and this fixed angle from the fore-end of raising protuberance 51 is preferred.Compare with the situation with bottom surface, have under the situation of bottom surface, the planar portions of protuberance front end is easy to evenly close thickness molding, but is not having under the situation of bottom surface, even also obtain the shape that thickness slowly changes easily in the planar portions of front end.

Be positioned at than the front position P1 of protuberance 51 more by the height D (with reference to Fig. 8 and Fig. 9 (a)) of the inner surface 61a of the receiving orifice 61 of lower position for more than the 0mm, be preferably above 0mm and below 20mm, be preferably 5～10mm.

In the present embodiment, as shown in Figure 7, the part 24 that the leading section by protuberance 51 of raw material sheet material 20 is directly pushed does not contact with the inner surface 61b of receiving orifice 61.Thus, can prevent this part 24 be pressed into or heat due to the fracture or the sclerosis of raw material sheet material, and can guarantee the better fluid permeability of face sheet can prevent the deterioration of skin sense of touch simultaneously.

Protuberance 51 shown in Figure 10 possesses ledge 53 that contacts with raw material sheet material 20 and the non-ledge 54 that does not contact with raw material sheet material 20 at leading section separately.Protuberance 51 shown in Figure 10 (a) has cancellate ledge 53, and the protuberance 51 shown in Figure 10 (b) has criss-cross ledge 53.

By using such protuberance 51, therefore the resistance in the time of can reducing to extract the protuberance 51 that is pressed into can not destroy the shape ground molding of recess 4.

In addition, the difference in height between ledge 53 and the non-ledge 54 is preferably set to for example 0.05～1.0mm.

According to the method for the 1st embodiment, can make above-mentioned face sheet 1 illustrated in figures 1 and 2 efficiently.The part of directly being pushed by the leading section of protuberance 51 when the bottom surface sections 44 of face sheet 1 is manufacturing.The bottom surface sections 44 of face sheet 1 illustrated in figures 1 and 2 forms the general planar shape, but also the leading section of protuberance 51 can be formed convex surface shape, bottom surface sections 44 is formed the circular-arc convex curve surface shape that protrude in the cross section downwards.

From the viewpoint of the stability of the three-dimensional shape that improves recess 4 and resiliency etc., preferably has following formation as the non-woven fabrics of raw material sheet material 20.

Thickness is preferably 0.2～3.0mm, is preferably 0.4～2.5mm especially.This thickness is for forming the concaveconvex shape thickness in preceding raw material sheet material stage, 0.5g/cm ²Loading under thickness use KEYENCE corporate system laser displacement measurement instrument (LK-085) etc. to measure.

In addition, the diameter of the peristome of the receiving orifice 61 of female member (is to be diameter of a circle of the same area under the non-circular situation at opening shape) is preferably 2.0～7.0mm, the diameter of protuberance 51 (position at the peristome of receiving orifice 61 is measured, and is diameter of a circle of the same area under non-circular situation) is preferably 0.5～2.5mm.

The embodiment manufacture method of the 2nd embodiment (below be also referred to as) to the manufacture method of the face sheet of the 3rd invention describes below.

About the manufacture method of the 2nd embodiment, describe for the place different with the manufacture method of the 1st embodiment, then omit explanation for same place.For the place that does not specify, can adopt the mode same with the 1st embodiment.

Manufacture method as the face sheet of the present invention's the 2nd embodiment, as shown in figure 11, it is following method: will be supplied to the protruding roller (convex parts) 5 with a plurality of protuberances 51 by the raw material sheet material 20 that fibrous material forms and have between the recessed roller (female member) 6 of a plurality of receiving orifices 61 that insert for protuberance 51, utilize protuberance 51 that raw material sheet material 20 partly is pressed in the receiving orifice 61 and make it to be deformed into concavity, fix the deformed shape of this concavity by heating, thereby make face sheet 1A with a plurality of recesses.

In the 2nd embodiment,, as shown in figure 11, also use at periphery to have the protruding roller 5 of a plurality of protuberances 51 and the recessed roller 6 that has a plurality of receiving orifices 61 and rotate at periphery with these protruding roller 5 interlocks as convex parts of the present invention and female member.

Figure 12 and Figure 13 are the figure of expression by the example of the face sheet 1A of the method manufacturing of the 2nd embodiment.Figure 12 and face sheet 1A shown in Figure 13 utilize protruding roller 5 shown in Figure 11 and recessed roller 6, form the face portion 3 that positive 31 sides contact with skin and positive 41 sides are concavity and the back side 42 side direction the side-prominent a plurality of recesses of

absorber

4,4 on the raw material sheet material 20 that is formed by non-woven fabrics ...

In Figure 12, directions X is the moving direction (MD) of raw material sheet material 20 and face sheet 1A when the manufacturing of face sheet 1A, and the Y direction is and the vertical direction of this moving direction (CD).

The receiving orifice 61 of the recessed roller (female member) 6 that uses in the present embodiment as shown in figure 14, has size and can make the inner surface 162,163 of protuberance 51 to the slotting rounding frustum of central part pine.

In addition, each receiving orifice 61 is formed with in the following manner the inclined plane 63a that tilts: near the inner surface of its peristome along with the deep side (downside Figure 14) from the depth direction Z ' of this receiving orifice 61 departs from this receiving orifice towards peristome side (upside among Figure 14) centre line C L 6 ground tilt.

As shown in figure 14, the cross sectional shape that forms on the plane parallel with the depth direction Z ' of receiving orifice 61 of the inclined plane 63a in the present embodiment is circular-arc.

The length L 63a of inclined plane 63a (measuring along the inclined plane, with reference to Figure 14) is preferably 10～350%, more preferably 15～250% with respect to the insertion depth L14 (with reference to Figure 14) of protuberance 51.

In addition, the protuberance 51 of the protruding roller that uses in the present embodiment (convex parts) 5 is in the cardinal extremity 51b of its projected direction side, has the inclined plane 52 that tilts according to the mode that departs from the centre line C L 5 of this protuberance 51 along with the front end 51a side from the projected direction of this protuberance 51 towards cardinal extremity 51b side.

As shown in figure 14, the inclined plane in the present embodiment 52 with the projected direction Z of protuberance 51 " cross sectional shape on the parallel plane is circular-arc.

The length L 52 on inclined plane 52 (measuring along the inclined plane, with reference to Figure 14) is preferably 2～160% with respect to the length from front end 51a to cardinal extremity 51b of the centre line C L 5 of protuberance 51, and more preferably 8～120%.

Shown in present embodiment, inclined plane of the present invention also comprises the inclined plane in circular-arc cross section.In addition, the centre line C L 5 of protuberance 51 is the straight line parallel with the projected direction of protuberance 51, and be with the vertical cross section of this projected direction on pass the straight line of the substantial middle portion of protuberance.The centre line C L 6 of receiving orifice 61 is the straight line parallel with the depth direction of receiving orifice 61, and be with the vertical cross section of this depth direction on pass the straight line of the substantial middle portion of receiving orifice 6.

In addition, the receiving orifice 61 of the recessed roller 6 that uses in the present embodiment and the protuberance 51 of protruding roller 5, insert under the state (with reference to Figure 14) of receiving orifices 61 at this protuberance 51, the width W (with reference to Figure 14) in the gap 7 between the inclined plane 52 of this protuberance 51 and the inclined plane 63a of this receiving orifice 61 increases along with the centre line C L 5 that departs from this protuberance 51 and this receiving orifice 61, CL6.

More specifically, the inclined plane 52 of the protuberance 51 in the present embodiment is circular-arc cross section with the inclined plane 63a of receiving orifice 61, but the radius of curvature on this inclined plane 52 is bigger than the radius of curvature of inclined plane 63a.The ratio of the radius of curvature of the inclined plane 63a of receiving orifice 61 and the radius of curvature on the inclined plane 52 of protuberance 51 (latter/the former) is preferably 0.1/1～0.9/1, and more preferably 0.2/1～0.8/1.In addition, the radius of curvature of the inclined plane 63a of receiving orifice 61 is with respect to the insertion depth L14 of protuberance 51, be preferably 8～150%, the radius of curvature on the inclined plane 52 of protuberance is preferably 5～75% with respect to the length from front end 51a to cardinal extremity 51b of the centre line C L 5 of protuberance 51.

In the present embodiment, the inclined plane 52 of protuberance 51 and the inclined plane 63a of receiving orifice 61 all form on the circumferencial direction of protuberance 51 or receiving orifice 61 continuously, and are seen as formation annularly from protuberance 51 and receiving orifice 61 centre line C L 5, CL6 direction separately.Therefore, the IIIA-IIIA line cross section (not shown) of the IIA-IIA line cross section of Figure 11 shown in Figure 14 and not shown Figure 11 is roughly the same, in cross section shown in Figure 14, the part except that the protuberance of outer circumference surface 153 of protruding roller 5 and the part except that the recess of outer circumference surface 164 of recessed roller 6 are expressed as linearity, relative therewith, in the IIIA-IIIA of not shown Figure 11 line cross section, these two parts 153,164 are expressed as circular-arc, and the two is different in this.

As shown in figure 11, between two

rollers

5,6, import raw material sheet material 20 with such formation linkage rotation.When importing raw material sheet material 20, protuberance 51 and receiving orifice 61 are respectively by heating in advance such as the known heaters that is assembled into protruding roller 5 and recessed roller 6.

In addition, about raw material sheet material 20, as shown in figure 15, the part 22 (form the part of top 3A) corresponding with the top 3A of the face sheet 1A of this raw material sheet material 20 uses a part at raw material sheet material 20 to be pressed into by protuberance 51 under the state of receiving orifice 61 and the discontiguous part of protruding roller 5 (convex parts).The top 3A of face sheet 1A be the most close skin side in the part between the

recess

4,4 of face sheet 1A (with the projected direction of recess in the other direction) part.

Rotation along with two

rollers

5,6, be imported into raw material sheet material 20 between two

rollers

5,6 by conveyance to the position that is pressed into receiving orifice 61 by protuberance 51 (protuberance 51 inserts the positions of receiving orifices 61), be pressed into the position at this, this receiving orifice 61 is pushed and be pressed into to the part that is positioned on this receiving orifice 61 by protuberance 51.

Then, apply heat, the deformed shape of its concavity is fixed (heat fixation) from the part that is pressed in the receiving orifice 61 and is deformed into concavity of 162,163 pairs of raw material sheet materials 20 of inner surface of protuberance 51 and receiving orifice 61.

In the method for present embodiment, as mentioned above, because the inner surface of the close peristome of receiving orifice 61 has formed inclined plane 63a, therefore when raw material sheet material 20 being pressed in the receiving orifice 61 and heating the part that is pressed into, can prevent from raw material sheet material 20 parts are applied excessive pressure and too much heat, thereby can prevent near the face portion of face portion 3 or recess 4, to produce partial high rigid portion etc.In addition, therefore the deformed shape of the concavity of the part that is pressed into receiving orifice 61 of raw material sheet material 20 can prevent part hardening owing to heat that face sheet 1A contacts with skin owing to be with under protruding roller 5 state of contact not to be fixed (heat fixation) in the part corresponding with the top 3A of face sheet 1A 22 that makes raw material sheet material 20.

Therefore, the skin sense of touch of the face sheet 1A that obtains is good.From obtaining the skin sense of touch viewpoint of excellent face sheet 1A more, the roughly Zone Full of the corresponding part (becoming the part of face portion 3) of face portion raw material sheet material 20 and face sheet 1A 3 is not contacted with protruding roller 5 (convex parts).

In addition, because recess 61 has inclined plane 63a, therefore can apply heat to the part that is pressed into receiving orifice 61 of raw material sheet material 20 from large tracts of land.Therefore, can prevent to suffer damage, can form the recess 4 of the post-equalization excellence of form simultaneously by the liquid diffusibility that the capillarity of raw material sheet material 20 is brought.

Preferred 51 pairs of raw material sheet materials 20 of protuberance be pressed into following carrying out: as shown in figure 15, around the part 24 that contacts and directly pushed with the leading section 51a of protuberance 51, produce inner surface 162,163 all discontiguous parts 23 with protuberance 51 and receiving orifice 61.Under the situation of using the raw material sheet material that fiber degree of freedom (being easy to activeness) is high as hot blast method non-woven fabrics,, can be that the center is extended the raw material sheet material widely with described part 23 by producing described part 23.

And the inclined plane 63a that the part of elongation like this is accepted hole 61 applies heat, by especially the non-woven fabrics rear side being applied heat more, can access the excellent more face sheet of resiliency and skin sense of touch.

From obtaining resiliency and the skin sense of touch viewpoint of excellent face sheet more, above-mentioned part 23 is produced annularly around part 24.

The preferred heating-up temperature of receiving orifice 61 inner surfacies is identical with the 1st embodiment.In addition, the heating-up temperature of protuberance 51 is preferably set to about 60～140 ℃, if the fusing point of hot-melt-bondable fiber contained in the non-woven fabrics fusing point of the lower composition of fusing point (under the situation of composite fibre for) is designated as A ℃, then more preferably A-70 ℃ of the heating-up temperature of protuberance 51～A+30 ℃.In addition, the heating-up temperature of the part except that protuberance 51 of protruding roller is preferably set to about 60～140 ℃, if the fusing point of hot-melt-bondable fiber contained in the non-woven fabrics fusing point of the lower composition of fusing point (under the situation of composite fibre for) is designated as A ℃, then more preferably A-70 ℃ of the heating-up temperature of the part except that protuberance 51 of protruding roller～A+30 ℃.

According to present embodiment, can easily make face sheet 1A like this with recess 4.The face sheet 1A that obtains, as mentioned above, the skin sense of touch of resiliency and the part that contacts with skin is good.

In addition, because recess 4 has bottom 44 and lower end opening not, therefore the liquid that moves to absorber is covered by this bottom 44, for example when the face sheet that is used for sanitary napkin etc., can prevent the eye-catching shortcoming of color of liquid such as menses in the sanitary towel etc. after use.

For the part corresponding with the top 3A of face sheet 1A 22 that makes raw material sheet material 20 do not contact with protruding roller (convex parts) 5, as shown in figure 14, preferably insert under the state of receiving orifices 61 at protuberance 51, will be set at the spacing distance L13 between the forward surface 153 (and face 164 face in opposite directions) of face 164 between the receiving

orifice

61,61 of female member 6 and convex parts 5 with the relation of the thickness of raw material sheet material 20 in setting more than.

For example, used thickness is described less than the non-woven fabrics of the 3mm situation as raw material sheet material 20, above-mentioned spacing distance L13 is preferably more than the 3mm, is preferably more than the 5mm especially.

In addition, when raw material sheet material 20 is pressed into receiving orifice 61, in order to produce inner surface 162, the 163 all discontiguous above-mentioned parts 23 with protuberance 51 and receiving orifice 61, as shown in figure 14, preferably insert under the state of receiving orifices 61 at protuberance 51, with the beeline L11 between the inner peripheral surface 163 of this protuberance 51 and this receiving orifice 61 be set at the relation of the thickness of raw material sheet material 20 in setting more than.

For example, used thickness is described less than the non-woven fabrics of the 3mm situation as raw material sheet material 20, above-mentioned beeline L11 (with reference to Figure 14) is preferably more than the 0.7mm, and 0.7～3mm more preferably is more preferably more than the 1mm.

In addition, from accessing the angle of recess 4 that is difficult to collapse and has the recuperability of three-dimensional shape, insert under the state of receiving orifice 61 at protuberance 51, longest distance L12 between the inner peripheral surface 163 of protuberance 51 and receiving orifice 61 (with reference to Figure 16 (a) and Figure 16 (b)) is preferably below the 4mm, is preferably below the 3mm especially.

In addition, from obtaining more spatial recess 4 and preventing bottom surface sections 44 disruptive angles, insert under the state of receiving orifices 61 at protuberance 51, the insertion depth L14 of protuberance 51 is preferably 0.5～6.0mm, is preferably 1.0～4.0mm especially.

The insertion depth L14 of protuberance 51 is along with the rotation of protruding roller 5 and recessed roller 6 changes gradually, so " protuberance 51 inserts the states of receiving orifices 61 " under the situation such as given size is meant the state when insertion depth L14 reaches maximum.

In the method for present embodiment, shown in Figure 16 (a), the cross sectional shape of the opening shape of receiving orifice 61 and protuberance 51 is circle, using under protruding roller 5 and the situation of recessed roller 6 as convex parts and female member, shown in Figure 16 (b), the opening shape of receiving orifice 61 is preferably it in the shape longer than the length L X ' on its axial length direction at this recessed roller 6 of the length L Y ' on the circumferencial direction of recessed roller 6.Preferably will for example be set at 1.2/1～6/1 with respect to the ratio of the length L Y ' of the circumferencial direction of the length L X ' of axial length direction (LY '/LX ').

In the present embodiment, being pressed in the receiving orifice 61 of raw material sheet material 20 and be deformed into fixedly following the carrying out that passes through heating of this deformed shape of the part of concavity: as Figure 14 and shown in Figure 15, insert at protuberance 51 under the state of receiving orifices 61, the inner surface 162,163 of the receiving orifice 61 that extends to the position darker than the front position P1 of this protuberance is heated.

The receiving orifice 61 of the female member of using in the above-mentioned embodiment 6 can be as shown in figure 14, it is hole with week facial 163 and bottom 162, the receiving orifice 61 of female member 6 also can be shown in Figure 17 (a) and Figure 17 (b), is to have week facial 163 and the hole that do not have bottom 162.

With reference to Figure 12 and Figure 13, an example of the face sheet that the manufacture method by the 2nd embodiment is obtained is that face sheet 1A describes further.For omitting explanation with the same place of face sheet 1.

As shown in figure 13, front 41 sides of recess 4 be concavity and the back side 42 side direction absorption side (lower side of Figure 13) outstanding.In addition, recess 4 has surrounding wall portion 43 and bottom surface sections (bottom) 44.Bottom surface sections 44 is the parts of directly being pushed by the leading section of protuberance 51 during fabrication.Also can make bottom surface sections 44 be general planar shape ground and form, make the leading section of protuberance 51 be the formation of convex surface shape ground, make bottom surface sections 44 be protruding circular-arc convex curve surface shape ground, its cross section downwards and form.

In the above-described embodiment, the two has inclined

plane

63a, 52 receiving orifice 61 and protuberance 51, but also can be as shown in figure 18, and only receiving orifice 61 has inclined plane 63a.In addition, as shown in figure 19, the inclined plane that receiving orifice 61 and protuberance 51 also can have a linearity cross section is used as the inclined plane 52 of the inclined plane 63a and/or the protuberance 51 of receiving orifice 61.

In addition, as shown in figure 20, the inclined plane 63a of receiving orifice 61 and/or the inclined plane 52 of protuberance 51 also can have a plurality of steps, and tilt as a whole.

In addition, as shown in figure 21, can be between the bottom of the leading section of protuberance 51 and receiving orifice 61, part 24 pressurizations that the leading section by this protuberance 51 of raw material sheet material 20 is directly pushed.At this moment, the above-mentioned bottom surface sections 44 of face sheet 1 is a pressurized part between the bottom of the leading section of protuberance and receiving orifice, by this pressurization, can improve the rigidity of the bottom surface sections (bottom) 44 of recess 4, even face sheet 1 is applied the compression stress of thickness direction, this drain recess 4 also is difficult to collapse.

In addition, shown in above-mentioned embodiment, using protruding roller and recessed roller to import under the situation of processing between them as convex parts and female member and with the raw material sheet material, the receiving orifice of preferred recessed roller has above-mentioned inclined plane on the fore-and-aft direction at least of roller circumferencial direction.

Face sheet of the present invention can be used as the face sheet of absorbent commodity.Absorbent commodity is to be used to the main article that keep urine or menses etc. to drain body fluid that absorb.Absorbent commodity comprises for example disposable diaper, sanitary napkin, incontinence pad etc., but is not limited to these, and it broadly comprises the article that are used to absorb from the liquid of human body discharge.

Absorbent commodity typically possesses face sheet, back-sheet and is configured in the absorber of the liquid retainability between two sheet materials.As absorber and back-sheet, can use the normally used material in present technique field with being not particularly limited.For example as absorber, the material that can use the fiber assembly that will form by fibrous materials such as paper pulp fibers or lining sheet materials linings such as fiber collection body and function thin paper that maintains absorbable polymer thereon or non-woven fabrics to form.As back-sheet, can use the thin film of thermoplastic resin, or the liquid impermeability or the hydrophobic sheet materials such as duplexer of this thin film and non-woven fabrics.Back-sheet can have steam breathability.Absorbent commodity can also further possess the various parts corresponding to the concrete purposes of this absorbent commodity.Such parts are known to those skilled in the art.For example, when absorbent commodity is used for disposable diaper or sanitary napkin, can dispose stereo enclosure more than 1 pair or 2 pairs in the left and right sides portion on the face sheet.

Below with reference to Figure 22 an embodiment of absorbent commodity of the present invention is described.

As shown in figure 22, an embodiment of the invention are face sheet 1B, back-sheet 11 and the absorber 12 between this two

sheet material

1B, 11 that sanitary napkin 10 (the following sanitary napkin 10 that also only is called) possesses the liquid permeability, and it in fact lengthways forms.Face sheet 1B and back-sheet 11 are being bonded with each other than the more outer side of the periphery of absorber 12 place.

The left and right sides of the excretory portion opposing part CA that sanitary napkin 10 disposes in opposite directions with fluid drainage portion towards wearer when dressing possesses a pair of alar part 13,13.As shown in figure 22, sanitary napkin 10 is the crooked state in concavity ground for its cross sectional shape at length direction when dressing.In face sheet 1B, " bending direction of the absorbent commodity during wearing " is meant the length direction AX of sanitary towel 10, is meant the width AY of sanitary towel 10 with the vertical direction of this bending direction.

Sanitary napkin 10 employed face sheet 1B are embodiments of the face sheet used of absorbent commodity of the present invention, as Figure 23～shown in Figure 25, it is formed by non-woven fabrics, and has the face portion 3 that positive 31 sides contact with skin and have surrounding wall portion 43 and bottom 44 and towards the outstanding a plurality of

drain recesses

4,4 of absorber 12 sides (lower side of Figure 24) on this non-woven fabrics ...

As shown in figure 24, front 41 sides of drain recess 4 are concavity, the back side 42 sides are convex.

For face sheet 1B, mainly its place different with 1A with above-mentioned face sheet 1 is described, for same place, use identical symbol in the accompanying drawings and omit its explanation.The place of Te Bieshuominging can not adopted and face sheet 1 and the same formation of face sheet 1A.

As non-woven fabrics 2, can there be the special various non-woven fabrics that restrictedly use the face sheet that in the past was used for absorbent commodity, for example hot blast method non-woven fabrics, air lay method non-woven fabrics, jet net-spraying method non-woven fabrics, needle point method non-woven fabrics etc.Wherein, hot blast method non-woven fabrics preferably.

Be assembled at face sheet 1B under the state of absorbent commodity, front 31 sides of face portion 3 contact with the skin of wearer.Like this, face portion 3 is the part that positive 31 sides contact with the skin of wearer.

The face portion 3 of face sheet 1B is for also keeping the part of general plane shape after the non-woven fabrics that uses as the raw material sheet material being implemented concavo-convex processing and being formed drain recess 4.In addition, face portion 3 forms around each drain recess 4 continuously.

Shown in Figure 23 and Figure 24 (a), in the cross sectional view (with reference to Figure 24 (a)) of the length direction of sanitary towel, face sheet 1B has high rigid portion 45 at the boundary portion place of 43 of the surrounding wall portion of face portion 3 that contacts with skin and drain recess 4.

More specifically, high rigid portion 45 forms at the open circumferential portion place of drain recess 4.In addition, form 2 high rigid portion 45 with respect to 1 drain recess 4, these 2 high rigid portion 45 form in the front and back of its drain recess 4 of the length direction AX of sanitary napkin 10.

In the cross section (with reference to Figure 24 (a)) of the length direction of sanitary towel, the rigidity of each high rigid portion 45 is than the rigidity height of the face portion 3 that contacts with skin.The rigidity of alleged here face portion 3 be meant face portion 3 central part 3A rigidity or on the length direction of sanitary towel with two rigidity in abutting connection with the position of above-mentioned central part 3A side in the position of high rigid portion 45 adjacency.Shown in Figure 24 (a), the central part 3A of face portion 3 is the position of the substantial middle position between adjacent drain recess 4.

In addition, in the cross section (with reference to Figure 24 (a)) of the length direction of sanitary towel, the rigidity of each high rigid portion 45 is than the rigidity height of the surrounding wall portion 43 of drain recess 4.The rigidity of alleged here surrounding wall portion 43 is meant on the length direction of sanitary towel the rigidity in abutting connection with the position of above-mentioned bottom 44 sides in two positions with high rigid portion 45 adjacency.

In addition, the compartment of terrain forms 2 high

rigid portion

45,45 on the circumferencial direction of the peristome of drain recess 4, and the rigidity of each high rigid portion 45 is than the face portion 3 that contacts with skin and the surrounding wall portion 43 rigidity height separately of this drain recess.In the plan view of face sheet 1B, each high rigid portion 45 is roughly wire.

In addition, alleged rigidity is meant that fiber is with the be fixed rigidity of this implication of density that produced of more accumulative state among the present invention, the contrasts of 2 position rigidity height, can according to for example from pair cross-section take pictures the microphotograph that obtains measure the thickness that obtains correlated 2 positions difference, be that difference on the density is judged.Wherein, the employed non-woven fabrics of face sheet be owing to can become the shape with fiber shape in high rigid portion, therefore do not show as fibre density and shows as density.

In addition, the rigidity of the high rigid portion 45 among the face sheet 1B of present embodiment than drain recess 4 at circumferencial direction and positions 46,46 (with reference to Figure 23) these high rigid portion 45 adjacency rigidity height separately.

The face sheet 1B that uses in the present embodiment is by forming above-mentioned high

rigid portion

45,45 near the peristome of drain recess 4, thereby when the wearing of sanitary napkin 10, even this sanitary towel 10 forms curved shape as illustrated in fig. 22 and face sheet 1B is crooked similarly, also be difficult to produce gauffer on the face sheet 1B.

Promptly, under the situation that does not have so high rigid portion 45, because the deflection of face sheet is greater than the deflection of the caused absorber of bending, thereby deform and produce irregular gauffer, therefore this gauffer becomes the reason that is created in shortcoming such as liquid flow or the deterioration of skin sense of touch on the face sheet, but as present embodiment, when the high rigid portion 45 of said structure is set on face sheet 1B, because with high rigid portion 45 is that the pliability axle is out of shape, thereby prevented the distortion of the central part 3A of face portion 3, therefore can alleviate deterioration by caused liquid flow of irregular gauffer and skin sense of touch.In addition, when high rigid portion 45 forms annularly according to the mode in the whole zone of the circumferencial direction that spreads all over drain recess 4, liquid rests on the skin sense of touch to be reduced and the high high rigid portion of density, and from the angle that hinders liquid to move to absorber, preferred high rigid portion is discontinuous at least in part.

Preferred high rigid portion 45 on the thickness direction Z of face sheet 1B, the central part 3A of face portion 3 from positive 31 height and position to the scope (in the scope of the thickness of representing with L23 Figure 24 (a)) of the height and position at the back side 32 in formation.

In addition, from can suppressing the generation of gauffer, and keep good skin sense of touch, the angle of high rigid portion 45 stable existences is set out, non-woven fabrics 2 integral body at preferred high rigid portion 45 places do not form film like, and the degree that deforms for the fiber that constitutes non-woven fabrics.Because whole when be film like, the thickness attenuation of sheet material and be easy to bending is therefore if the film like part in the ground existence of high rigid portion 45 point-like, then can make high rigid portion 45 more stable.

In addition, in the sanitary napkin 10 of present embodiment, as shown in figure 25, drain recess 4 is configured to staggered on face sheet 1B.And, a plurality of high

rigid portion

45,45 ... many high rigid portion row L forming of string ground arranged spaced roughly ₄₅Be formed extended at both sides on napkin width direction AY respectively, described width AY is the vertical direction of bending direction of the sanitary napkin 10 (absorbent commodity) when dressing.Particularly, on the length direction AX of sanitary towel 10, roughly string ground arrangement on the width AY of sanitary towel 10 between the adjacent 2 row drain recesses row high rigid portion 45 separately forms high rigid portion row L ₄₅And, on the length direction AX of sanitary towel 10, separately dispose many so high rigid portion row L certain intervals ₄₅

So arrange by high rigid portion 45, can more effectively prevent to produce greater than the deflection of absorber owing to the deflection of face sheet with the bending direction vertical direction on gauffer.

The high rigid portion row L of sanitary towel 10 on length direction AX ₄₅The interval be preferably 1.5mm～6.0mm, be preferably 2.5mm～4.0mm especially.

In addition, the distance of high rigid portion between the center to center on the width AY of sanitary towel 10 that comprises in the high rigid portion row is preferably 1.5mm～5.5mm, is preferably 1.5mm～4.0mm especially.

In the time of in high rigid portion is listed in above-mentioned scope, can suitably disposes the part of absorption and the part of inhibition gauffer are out of shape in the distortion of face sheet, and can the above-mentioned effect of easier performance.

In addition, among the face sheet 1B in the present embodiment, the fiber orientation directions of non-woven fabrics 2 is consistent with the length direction AX of sanitary napkin 10.

The high rigid portion row of above-mentioned multiple row L ₄₅Respectively with the vertical direction of fiber orientation directions (directions X) (Y direction) of non-woven fabrics 2 on be formed extended at both sides.Thus, mainly by the distortion of the recess that external force caused of generation such as conveyance of non-woven fabrics by the described high rigid portion inhibition of the width periphery of each recess, owing to utilize the high rigid portion with each recess adjacency to make described distortion fixing, therefore on face sheet, be difficult to produce (elongation and its are fixed produced) gauffer.

In addition, near high

rigid portion

45,45 fiber orientation directions at non-woven fabrics 2 (directions X) that form peristome of drain recess 4 go up, form in the front and back of this drain recess 4 respectively.

By with the relation of fiber orientation directions in arrange high rigid portion 45 in the front and back of drain recess 4, can be with the molding stably of high rigid portion 45, and can keep and fiber orientation directions soft near vertical.

In the cross section (with identical with the vertical cross section of the fiber orientation directions of non-woven fabrics) of the width AY of sanitary towel 10, the bottom surface sections of the drain recess 4 of present embodiment is littler than the thickness T 1 of face portion 3 in abutting connection with the thickness T a of position A.Therefore, bottom surface sections is in abutting connection with the fibre density of the non-woven fabrics at the position A place fibre density height than the non-woven fabrics at face portion 3 places.So, if littler than the thickness T 1 of face portion 3, can improve the mobility that liquid moves to absorber at the thickness T a of the facial adjacency section position A of cross section upper base of at least one direction of the length direction AX of sanitary towel and width AY.

In addition, shown in Figure 24 (b), on the cross section of the width AY of sanitary towel 10, the thickness of the surrounding wall portion 43 of the drain recess 4 in the present embodiment bottom surface sections 44 sides from face portion 3 side direction and is reduced gradually, thus, the fibre density of the non-woven fabrics of formation surrounding wall portion 43 bottom surface sections 44 sides from face portion 3 side direction increases gradually.On the cross section of at least one direction of the length direction AX of sanitary towel and width AY, when fibre density was so changed, liquid was excellent more to the mobility that absorber moves in abutting connection with mobility and then liquid that position A moves to bottom surface sections from face portion 3 and/or surrounding wall portion 43.

From improving the ambulant viewpoint that liquid moves to absorber, the bottom surface sections of surrounding wall portion 43 is preferably the 5-80% of face portion in abutting connection with the thickness T b of position B in abutting connection with the thickness T a of position A, and more preferably 5～50%.

As shown in figure 25, the drain recess 4 following configurations among the face sheet 1B of present embodiment: face portion 3 the fiber orientation directions (directions X among the figure) of non-woven fabrics 2 and with this both direction of the vertical direction of fiber orientation directions (Y direction among the figure) on discontinuous linearity ground exist.Relative therewith, Figure 26 goes up the figure of the embodiment of continuous linearity ground existence for expression face portion 3 in the fiber orientation directions (directions X among the figure) of non-woven fabrics 2 with the vertical direction of fiber orientation directions (Y direction among the figure).

Above-mentioned face sheet 1B for example can make as follows.

In the preferred manufacture method of face sheet 1B, as shown in figure 27, use pair of

rolls

5,6 on the raw material sheet material 20 that forms by non-woven fabrics, to form a plurality of

drain recesses

4,4 ... thereby, obtain face sheet 1B.Fiber orientation directions as the non-woven fabrics of raw material sheet material 20 is consistent with the moving direction (MD direction) of raw material sheet material 20.

In example shown in Figure 27, about recess 61, with the vertical cross section of axial length direction (cross section shown in Figure 28) of roller 6 with in arbitrary cross section (cross section shown in Figure 29) in the cross section of the axial length direction of roller 6, the inner peripheral surface 262 of recess 61 combines to approximate right angle with the boundary portion (the open circumferential portion of recess) of the part 263 except that the recess of roller 6 (level and smooth roller periphery) at the two.

As shown in figure 27, when the raw material sheet material 20 that will be formed by non-woven fabrics imports between the 1st and the

2nd roller

5,6 of rotation, as shown in figure 28, this raw material sheet material 20 by protuberance 51 conveyances to the position that is pressed into to recess 61, and be pressed into the position at this, under the part except that recess 61 of the 2nd roller 6 and back side state of contact, this recess 61 is pushed and be pressed into to the part that is positioned on this recess 61 by protuberance 51.

In this process of press in, around part 24 that the leading section with protuberance 51 of raw material sheet material 20 contacts and directly pushed, exist and protuberance 51 and all discontiguous part 23 of recess 61, this part 23 is compared biglyyer with other parts and is extended.

Then, the above-mentioned part 23 that is under the elongation state is applied heat, utilize this heat that its elongation state is fixed (heat fixation), thereby form stable drain recess 4 on the structure from the inner surface of recess 61.

In addition, when being pressed into recess 61 by protuberance 51, the non-woven fabrics that constitutes raw material sheet material 20 is easy to elongation on the moving direction (MD) of raw material sheet material 20, and with the vertical direction of this moving direction (CD) on relatively be difficult for elongation.Therefore, the compression of pressurizeing of the opening edge portion of the recess 61 that the part of the front and back end that is positioned at recess 61 on the moving direction (MD) of raw material sheet material 20 is formed by approximate right angle ground powerfully, its state is become high rigid portion 45 by heat fixation.

So, can access the face sheet 1B that is formed with a plurality of high rigid portion 45.In the face sheet 1B that obtains, bottom surface sections 44 mainly is made of the part 24 of directly being pushed by the leading section of protuberance 51, and surrounding wall portion 43 mainly is made of above-mentioned part 23.

Formation material to sanitary napkin 10 describes below.

As absorber 12 and back-sheet 11, can not have and especially restrictedly use normally used in the art material.For example as absorber, the material that can use the fiber assembly that will form by fibrous materials such as paper pulp fibers or lining sheet materials linings such as fiber collection body and function thin paper that maintains absorbable polymer thereon or non-woven fabrics to form.As back-sheet, can use the thin film of thermoplastic resin, or the liquid impermeability or the hydrophobic sheet materials such as duplexer of this thin film and non-woven fabrics.Back-sheet can have steam breathability.

The present invention is not subjected to the restriction of above-mentioned embodiment.

For example, the surrounding wall portion 43 of drain recess 4 and the plan view shape of bottom surface sections 44 can in addition, can also be polygons such as rhombus, square, rectangle, perhaps heart type, star etc. with oval replacement positive circle shown in Figure 3.For example, be under the polygonal situation, preferred bight is circular.

In addition, form on bottom surface sections 44 tops ground under the situation of fiber fixed part 45 ', the shape of this fiber fixed part 45 ' replaces square shown in Figure 5, also can for circular, Elliptical is circular, rhombus, rectangle, heart type or star etc.

In addition, the shape of high rigid portion 45 also can be the crescent shape that extends along the Zhou Fangxiang of drain recess 4, Elliptical circle shape, oval shape, fan-shaped etc.

In addition, when drain recess 4 according to face portion 3 the fiber orientation directions of non-woven fabrics 2 or with the vertical direction of fiber direction of a curve on the mode that exists of discontinuous linearity ground when disposing, this drain recess 4 also can dispose according to the mode of the 3 continuous linearity ground existence of face portion on either direction.In addition, also can so not dispose, and only near the position that disposes in opposite directions with fluid drainage portion and its, drain recess 4 so disposes at the recess of drain on the whole 4 of face sheet.

In addition, can be between the bottom of the leading section of protuberance 51 and receiving orifice 61, part 24 pressurizations that the leading section by this protuberance 51 of raw material sheet material 20 is directly pushed.At this moment, the above-mentioned bottom surface sections 44 of face sheet 1 becomes pressurized position between the bottom of the leading section of protuberance and receiving orifice, by this pressurization, can improve the rigidity of the bottom surface sections (bottom) 44 of recess 4, even face sheet 1 is applied compression stress on the thickness direction, this drain recess 4 also is difficult to collapse.

In addition, it is not positive circle or Elliptical circle that the shape of protuberance 51 and receiving orifice 61 can be distinguished, and is that rhombus, square, rectangle etc. are polygon-shaped, perhaps is heart, star etc.For example, be under the polygonal situation, preferred bight is circular.

In addition, as shown in figure 22, absorbent commodity can not be the crooked state in cross sectional shape concavity ground of length direction when dressing, but the cross sectional shape of width is the crooked state in concavity ground.In addition, absorbent commodity can have the part of crooked in the longitudinal direction part and bending on width, and high rigid portion can different modes be provided with the part that disposes on each part mentioned above.In above-mentioned face sheet 1B, can 2 high rigid portion be set 1 drain recess 4, also can be only on any of the front and back of the drain recess of fiber orientation directions, drain recess 4 be set.In addition, also can be only on for example being configured in the part of excretory portion opposing part CA, the part of face sheet 1B forms drain recess 4 with high rigid portion 45.

In addition, also can use the fiber orientation directions face sheet consistent of non-woven fabrics with the width of absorbent commodity.

In addition, high rigid portion 45 on the boundary portion that is not limited on the meaning of strictness to be formed between the surrounding wall portion 43 of face portion 3 and drain recess 4, also can be formed on this boundary portion near.In addition, also can have and spread all over from face portion 3 to surrounding wall portion 43 length.

Absorbent commodity of the present invention is preferably and is used to absorb the article of maintenance from the liquid of health discharge.As such absorbent commodity, except sanitary napkin, can also enumerate sanitary pad, incontinence pad, disposable diaper, absorbent breast pad etc.Sanitary napkins etc. can not possess a pair of alar part in the left and right sides of excretory portion opposing part yet.

In addition, the part of in the above-described first embodiment omission explanation and the feature that has of first embodiment only also can suitably be applicable to other embodiments.In addition, the mutual alternative suitably between embodiment of the feature in each embodiment.

The face sheet of the absorbent commodity of the 1st invention has the drain recess that has the bottom, and when resiliency was good, liquid was also excellent to the mobility that absorber moves.

According to the manufacture method of the 2nd face sheet of inventing, can easily make the recess and the good face sheet of resiliency that have bottom having.

According to the manufacture method of the 3rd face sheet of inventing, can make the recess and resiliency and the good face sheet of skin sense of touch that have bottom having efficiently.

The absorbent commodity of the 4th invention has the recess that has the bottom, and liquid is good to mobility and the resiliency that absorber moves, even and when dressing bending also be difficult on face sheet, produce gauffer.

The face sheet that the absorbent commodity of the 5th invention is used has the recess that has the bottom, its liquid is good to mobility and the resiliency that absorber moves, and owing to be positioned at the high rigid portion and the recess of front and back of the fiber orientation directions of recess, thereby be difficult on face sheet, produce gauffer.

Claims

1. the face sheet of an absorbent commodity, it is by forming face portion and a plurality of drain recess forms on non-woven fabrics, and the face side of described face portion contacts with skin, and the face side of described drain recess is concavity and rear side is side-prominent towards absorber;

Wherein, described drain recess has surrounding wall portion and bottom surface sections, and this bottom surface sections is positioned at than the back side of described face portion more by absorbing the position on side, and the thickness with position described bottom surface sections adjacency described surrounding wall portion is littler than the thickness of described face portion.

2. the face sheet of absorbent commodity according to claim 1, wherein, the thickness of described surrounding wall portion reduces gradually from the described bottom surface sections side of described face portion side direction.

3. the face sheet of absorbent commodity according to claim 1, wherein, the thickness with position described face portion adjacency described surrounding wall portion is littler than the thickness of described face portion.

4. the face sheet of absorbent commodity according to claim 1, wherein, the described non-woven fabrics of described bottom surface sections has the binding site of fiber and fiber and is keeping the liquid permeability.

5. the face sheet of absorbent commodity according to claim 1, wherein, described drain recess disposes in the following manner: described face portion the fiber orientation directions of described non-woven fabrics or with the vertical direction of this fiber orientation directions on do not exist with successive rectilinear form.

6. the face sheet of absorbent commodity according to claim 1, wherein, described bottom surface sections has the fiber fixed part except that the binding site of fiber and fiber.

7. the manufacture method of a face sheet, be used to make the face sheet with a plurality of recesses of absorbent commodity, wherein, the raw material sheet material supplied to the convex parts with a plurality of protuberances and have between the female member of a plurality of receiving orifices that insert for described protuberance, utilize described protuberance that described raw material sheet material partly is pressed in the described receiving orifice and make it to be deformed into concavity, fix the deformed shape of this concavity by heating;

Wherein, use non-woven fabrics as described raw material sheet material, according to around the part of directly being pushed, forming and the equal mode of discontiguous part of the inner surface of described protuberance and described receiving orifice by the leading section of described protuberance, described raw material sheet material is pressed into described receiving orifice, fix the deformed shape of described concavity simultaneously by heating, described fixedly following carrying out: insert at described protuberance under the state of described receiving orifice, the inner surface of the receiving orifice of the front position that extends to described protuberance or the darker position of comparing is heated.

8. the manufacture method of face sheet according to claim 7, wherein, described non-woven fabrics is a hot blast method non-woven fabrics.

9. the manufacture method of face sheet according to claim 7, wherein, the thickness of described raw material sheet material is less than 3.0mm, insert at described protuberance under the state of described receiving orifice, make beeline between the open circumferential portion of described protuberance and described receiving orifice more than 0.7mm, and the spacing distance between the forward surface of face around the described receiving orifice and described convex parts that makes described female member is more than 1mm.

10. the manufacture method of face sheet according to claim 7, wherein, the part that the leading section by described protuberance of described raw material sheet material is directly pushed does not contact with the inner surface of described receiving orifice.

11. the manufacture method of face sheet according to claim 10, wherein, described convex parts have part that contacts with described raw material sheet material and the part that does not contact with described raw material sheet material at the leading section of described protuberance.

12. the manufacture method of face sheet according to claim 7, wherein, described receiving orifice has the bottom, between the bottom of the leading section of described protuberance and described receiving orifice, the part that the leading section by described protuberance of described raw material sheet material is directly pushed is pressurizeed.

13. the manufacture method of face sheet according to claim 7, wherein, described convex parts are for having the protruding roller of described protuberance, the recessed roller of described female member for having described receiving orifice and rotate with described protruding roller interlock on periphery on periphery.

14. the manufacture method of face sheet according to claim 13, wherein, the opening shape of described receiving orifice is that it is in the shape longer than the length on its axial length direction at described recessed roller of the length on the circumferencial direction of described recessed roller.

15. the manufacture method of a face sheet, be used to make face sheet with a plurality of recesses, wherein, to supply to convex parts by the raw material sheet material that fibrous material forms and have between the female member of a plurality of receiving orifices that insert for described protuberance with a plurality of protuberances, utilize described protuberance that described raw material sheet material partly is pressed in the described receiving orifice and make it to be deformed into concavity, fix the deformed shape of this concavity by heating;

Wherein, described receiving orifice is formed with the inclined plane, this inclined plane according near the inner surface of the peristome of described receiving orifice along with the deep side from the depth direction of this receiving orifice departs from the centrage of described receiving orifice towards the peristome side mode tilts;

Heat described convex parts and described female member;

When utilizing described protuberance that described raw material sheet material partly is pressed into described receiving orifice, make the part corresponding described raw material sheet material with top described face sheet not with described convex parts state of contact under, fix the deformed shape of the concavity that is pressed into the part in the described receiving orifice by heat.

16. the manufacture method of face sheet according to claim 15, wherein, described protuberance has the inclined plane at the base end side of its projected direction, and this inclined plane tilts according to the mode that departs from the centrage of described protuberance along with the front from the projected direction of described protuberance towards base end side.

17. the manufacture method of face sheet according to claim 15, wherein, insert at described protuberance under the state of described receiving orifice, the width in the gap between the described inclined plane of described protuberance and the described inclined plane of described receiving orifice increases along with the centrage that departs from described protuberance and described receiving orifice.

18. the manufacture method of face sheet according to claim 15 wherein, is inserted at described protuberance under the state of described receiving orifice, the inner surface of described receiving orifice extends to the front position of described protuberance or the darker position of comparing.

19. the manufacture method of face sheet according to claim 15, wherein, the thickness of described raw material sheet material is less than 3mm, insert at described protuberance under the state of described receiving orifice, the spacing distance between the forward surface of face between the described receiving orifice and described convex parts that makes described female member is more than 1mm.

20. the manufacture method of face sheet according to claim 15, wherein, the part that the leading section by described protuberance of described raw material sheet material is directly pushed does not contact with the inner surface of described receiving orifice.

21. the manufacture method of face sheet according to claim 20, wherein, described convex parts possess part that contacts with described raw material sheet material and the part that does not contact with described raw material sheet material at the leading section of described protuberance.

22. the manufacture method of face sheet according to claim 15, wherein, described convex parts are for having the protruding roller of described protuberance on periphery, and described female member is for having the recessed roller of described receiving orifice on periphery.

23. an absorbent commodity, it possesses face sheet, the back-sheet of liquid permeability and is present in absorber between this two sheet material, and is essentially elongate shape;

Wherein, described face sheet is formed by non-woven fabrics, and this non-woven fabrics has face portion and a plurality of drain recess, and the face side of described face portion contacts with skin, and described drain recess has surrounding wall portion and bottom, and side-prominent towards absorber;

In the cross sectional view of absorbent commodity length direction, described face sheet has high rigid portion near the boundary portion of described face portion and described surrounding wall portion or its, and the rigidity of this high rigid portion is than described face portion and described surrounding wall portion rigidity height separately.

24. absorbent commodity according to claim 23 is characterized in that, the fibre density of described high rigid portion is than the fibre density height of described face portion and described surrounding wall portion.

25. absorbent commodity according to claim 23, wherein, in the plan view of described absorbent commodity, described drain recess is configured to staggered, and a plurality of described high rigid portion roughly high rigid portion row of many of forming of string ground arranged spaced are formed extended at both sides on the width of absorbent commodity respectively.

26. absorbent commodity according to claim 25, wherein, described high rigid portion row be formed on the vertical direction of the fiber orientation directions of described non-woven fabrics on.

27. the face sheet that absorbent commodity is used, it is used for the skin contact surface of absorbent commodity;

In the cross section of the fiber orientation directions of non-woven fabrics, near the boundary portion of described face portion and described surrounding wall portion or its, have high rigid portion, the rigidity of this high rigid portion is than described face portion and described surrounding wall portion rigidity height separately.