CN1204865C - Absorbent article - Google Patents
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- CN1204865C CN1204865C CN 97117018 CN97117018A CN1204865C CN 1204865 C CN1204865 C CN 1204865C CN 97117018 CN97117018 CN 97117018 CN 97117018 A CN97117018 A CN 97117018A CN 1204865 C CN1204865 C CN 1204865C
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Abstract
To provide a confortable feeling of wearing, being pleasant to the skin of a user and to improve feel and dry sense by making structures of nonwoven fabrics different on the central part and both side parts of a surface sheet as a face being brought into contact with the skin of an absorptive article and making structure of opening holes provided on the central part three- dimensional. A sanitary napkin 100 is prepd. by placing a main body 110 having a liq. retentive absorptive part 104 between a surface sheet 1 as a liq.- permeable skin contacting face and a back face sheet as a liq.-non-permeable non-skin contacting face. This surface sheet 1 comprises a nonwoven fabric consisting of a part (a region A) with a number of opening holes 6 provided at approximately central part and a part (a region B) with no opening part 6 provided on both side parts. In addition, the opening holes 6 are formed by surrounding them with a nonwoven fabric extending from the surface 8A to the back face 8B of the surface sheet 1 and a part between adjoining opening holes 6 is curved into a projected shape so as to have a top part 5. In addition, the ratio of emboss treatment applied on the region B is pef. 8-70%.
Description
Technical field
The present invention relates to a kind of absorbent commodity, as sanitary towel and disposable diaper.The invention particularly relates to a kind of absorbent commodity with improved quality such as sense of touch and dry feeling.
Background technology
The absorbent commodity of many routines such as sanitary towel and disposable diaper use porous membrane or non-woven fabrics to make the top layer material.
Using porous membrane to do under the situation of top layer material, 57-17081 discloses as Japanese Patent Publication, and plastic sheeting is absorbed blood or urine by perforate through the hole, but this porous membrane has exclusive sticking (sticky) sense of plastic sheeting.In addition, because porous membrane and skin contact surface be not except that by there being breathability the hole, like this when the sticking sense that can bring a kind of discomfort during as the top layer material of absorbent commodity with it.
When making the top layer material with non-woven fabrics, open the announcement of clear institute such as Japan is real: the top layer material with the hydrophobicity non-woven fabrics formation in fixed interval hole has alleviated wet sense and has improved the permeability of body fluid, but so the top layer material can not make body fluid evenly infiltrate in the absorber, thus itself in addition under low the absorption, also cause seepage easily and make the user sensation wet and sticking.In addition, the part major part of sanitary towel or disposable diaper and user contact skin mainly contacts with the human body perineal position at its lateral parts, because above-mentioned top layer material is all porose on its whole surface, harder zone can cause erythra or scratch where it itches around lateral aperture.
For addressing the above problem, Japanese kokai publication sho 62-125061 and flat 4-24261 invented a kind of in that the centre is porose the side does not have hole or whole edge all not to have foraminous top layer material.But because in fact the perforate part has identical nonwoven fabric construct with not perforate part (side or edge), if the needs that the fine hair shape just can not meet perforate part flexibility are not made in marginal portion or side, and the fine hair shape makes the user discomfort or causes erythra.If the surface strength that makes top layer material embossing (emboss) or strengthen non-woven fabrics is to prevent in the marginal portion or side formation fine hair, then the center drilling part will make the hard and discomfort of user sensation.
Summary of the invention
In view of the above, an aspect of of the present present invention provide a kind of be suitable for user skin, softish, use comfortable absorbent commodity with improved sense of touch and dry feeling.
Through fully research, the present inventor finds: by using a kind of top layer material, they are directly different with structure on two sides with contact skin and core, and through making the absorbent commodity that core formation three-dimension hole can accomplished above-mentioned purpose.
The present invention is based on above discovery finishes.Purpose of the present invention realizes by a kind of like this absorbent commodity is provided, described absorbent commodity comprises a fluid permeability skin contact surface, the liquid retainability absorber of the non-skin contact surface of one liquid impermeability and between described skin contact surface and non-skin contact surface, wherein: described skin contact surface is by comprising first district with many perforates and not having the non-woven fabrics in second district of perforate to form; Described first district vertically is positioned at its core along described absorbent commodity, perforate on the described non-woven fabrics is extended to the bottom surface from the end face of described skin contact surface, so all there is described non-woven fabrics to hold around each described perforate, the inwall of each perforate forms and the successive one side of end face, and the part between every adjacent apertures all has the protuberance that a curved surface forms dome; Described second district vertically is positioned at absorbent commodity both sides and contiguous with first district along described absorbent commodity, and embossing, and the embossing rate in second district is 10-50%; The ratio that described first sector width accounts for the main body overall width is between 50-90%, and the overall width in described second district of main body both sides accounts for the ratio of main body overall width between 10-50%; The percent opening in described first district is 7-20%, and the diameter d of described perforate is 0.5-2.0mm on described base; And, be a＞b＞c at the nonwoven thickness c on the base of described perforate and the pass between the thickness b three at the mid portion between thickness and the base wherein at the non-woven fabrics maximum ga(u)ge a of described bump pad.
In absorbent commodity of the present invention, be used as in the top layer material of skin contact surface, the formation of the perforate of core is to extend to the bottom surface with the end face of non-woven fabrics from described skin contact surface, make each described perforate center on by described non-woven fabrics, and the part between every adjacent apertures all has the protuberance that a curved surface forms dome, be that perforate is three-dimensional and softish, make user that the sensation of cushion be arranged.Except having good sense of touch, this perforate also reduces the contact area of top layer material and skin, makes absorbent commodity that a kind of improved dry feeling be arranged in use.
In addition, owing to second district corresponding to no perforate two side portions feels more level and smooth through embossing, then can avoid forming fine hair, thereby avoid the generation of erythra by the user skin friction.
Description of drawings
Fig. 1 is the perspective view of the sanitary towel of first embodiment of the present invention.
Fig. 2 is the cross section sketch map of the top layer material of sanitary towel shown in Figure 1 use along the a-a line.
Fig. 3 is the top layer material major part enlarged perspective that sanitary towel shown in Figure 1 uses.
Fig. 4 is the top layer material major part amplification view that sanitary towel shown in Figure 1 uses.
Fig. 5 is a top layer shown in Figure 2 material major part enlarged diagram.
Fig. 6 is the major part enlarged diagram (corresponding to Fig. 5) in the sanitary towel of second embodiment of the present invention employed top layer material A district.
The specific embodiment
Below with reference to accompanying drawing the preferred embodiment of absorbent commodity of the present invention is discussed in detail.Fig. 1 is the perspective view of the sanitary towel of first embodiment of the present invention.Fig. 2 is the cross section sketch map of the top layer material of sanitary towel shown in Figure 1 use along the a-a line.Fig. 3 is the top layer material major part enlarged perspective that sanitary towel shown in Figure 1 uses.Fig. 4 is the top layer material major part amplification view that sanitary towel shown in Figure 1 uses.Fig. 5 is a top layer shown in Figure 2 material major part enlarged diagram.
In the sanitary towel according to embodiment shown in Figure 1, the top layer material is made of non-woven fabrics, and it comprises second district (this paper refers to do the B district) that first district (this paper refers to do the A district) of many perforates is arranged and do not have perforate.
As shown in Figure 1, the A district vertically is located at the core of sanitary towel 100 along sanitary towel with Rack.The A district can be isometric or short slightly with sanitary towel 100.Under any circumstance, it will be arranged at least corresponding on user discharge opeing part and/or its adjacent portion bit position.
The B district vertically is positioned at the both sides of sanitary towel 100 along sanitary towel with Rack.The B district is similar to the A district and is arranged at the total length of sanitary towel 100 and is positioned at the A district contiguous.
Except that sanitary towel's main body 110, the B district also is located in the flap 101,101.
As shown in Figure 1, 2, the A district is positioned on the absorber 104.For provide ratio that good sense of touch and dry feeling, A sector width account for main body 110 overall widths preferably between 40-95%, more preferably between the 50-90%, between 55-85% to user.
As shown in Figure 1, the part in B district is positioned on the absorber 104.Identical in the B district on main body 110 1 sides with B sector width on the opposite side.For preventing to produce fine hair by user motion, at the ratio of the B district overall width of main body 110 both sides and main body overall width preferably between 5-60%, more preferably between 10-50%, most preferably between 15-45%.
Conventional known non-woven fabrics can be used as top layer material 1 and does not have particular restriction, and can make suitable selection in various types of according to purpose and purposes, as the carded yarn non-woven fabrics, and spun-bonded non-woven fabrics, jet net-spraying method non-woven fabrics.The adherent method of fiber does not have particular restriction in the non-woven fabrics.For example, useful binders or use the heat viscosity method binder fibre perhaps need not be bonding, can be with the fibre machinery entanglement, as in the jet net-spraying method non-woven fabrics.For obtaining the improvement of required character, especially flexibility and dry feeling, only non-woven fabrics is bonding with meldable fibre carded web bonding preparation by absorbing heat, and if desired, can carry out embossing subsequently.
Term used herein " non-woven fabrics " is meant and comprises various no perforated layer materials, comprise that not only the non-woven fabrics with single structure also comprises by various non-woven fabrics combinations, non-woven fabrics combines with thin film, and non-woven fabrics combines with paper, and non-woven fabrics combines the composite sheet that forms with other material.
From the uniformity and the machinability of sense of touch, structure, the preferred 15-45g/m of the basic weight of non-woven fabrics
2, 15-35g/m more preferably
2
Without limitation, the fiber that is used for non-woven fabrics comprises synthetic fibers, as polyethylene (PE), and polypropylene (PP), polyester (as polyethylene terephthalate (PET)) and polyamide (as nylon); Regenerated celulose fibre such as staple fibre and cuprammonium staple fibre; And natural fiber such as Cotton Gossypii.Composite fibre is made the core of sheath/sheath fiber type, bilateral fibre and divergence type (divided) fiber and is suitable for too as made core and low-melting fiber by high-melting fibre.These fibers can be separately or two or more unite use.
By the cause of embossing operation operability, the fiber that preferably constitutes non-woven fabrics comprises two kinds of compositions with different melting points at least, and promptly first kind of composition is lower than the fusing point of second kind of composition.The fiber that first kind of composition made and second composition are made fiber and be can be used as single fiber or be unified into composite fibre, as above-mentioned core/sheath fiber and bilateral fibre.
From control thickness and performance, non-woven fabrics preferably has at least two-layer.In this case, the upper strata comprises the above-mentioned of no more than 50% (weight) and has low-melting first kind of fibre composition, and lower floor comprises the first kind of fibre composition that is no less than 50% (weight).The upper strata that first kind of fibre composition occupies the minority is difficult for shock wave and softish sense of touch is provided, thereby and the lower floor that first kind of fibre composition occupies the majority is easy to the intensity that embossing improves non-woven fabrics.
Without limitation, the preferred 0.1-6 danier of these fibre diameters, more preferably 1-4 danier.If fibre diameter is less than 0.1 danier, then fiber spacing is too little so that make liquid be easy to remain on the material of top layer by capillarity.If fibre diameter surpasses 6 daniers, then top layer material covering power a little less than.In view of the above, above-mentioned scope is preferred.
The example of raw material non-woven fabrics that is used for the sanitary towel of the present embodiment comprises having 25g/m
2The non-woven fabrics of basic weight, it is by the PET/PE of combing diameter 2 daniers (50/50 volume ratio) core/sheath type composite fibre, and after the hot sticky comb and parallel cotton fibers prior to spinning net of hot-air and obtaining.
In the absorbent commodity as sanitary towel, core is different with the exposure level (frictional force) of both sides and user skin, the exposure level (frictional force) that is both sides is than core height, thereby requires the top layer material to have softish core and level and smooth side.In the sanitary towel of the present embodiment, the embossing rate in the A district in the top layer material 1 is preferably 7% or lower thus, and more preferably 5% or lower.If the embossing rate in A district is greater than 7%, thereby then the reduction of the cushioning effect of top layer material causes bad sense of touch.In other words, in fact the A district does not need embossing (being that the embossing rate is 0%).
On the other hand, the embossing rate in B district is preferably 8-70%, and more preferably 10-50% most preferably is 15-40%.If the embossing rate in B district is less than 8%, the flatness in B district will reduce, thereby and has been easy to fine hair and causes erythra.
Elaborate the A district in the top layer material 1 below.Shown in Fig. 2 and 3, the perforate 6 in the A district is extended to bottom surface 8B by the end face 8A of non-woven fabrics top layer material 1, so all have non-woven fabrics to hold around each perforate, thereby the inwall 10 of each perforate 6 has formed the successive one side with end face 8A, i.e. perforate 6 is three-dimensional.The structure of this three-dimensional perforate comprises a cylindrical shape (wall that holds perforate 6 has formed cylindrical shape) and a cone shape, and wherein the diameter of perforate 6 reduces gradually from end face 8A to bottom surface 8B.Preferred shape such as Fig. 2,3 are depicted as an inverted-cone shape, and its diameter reduces gradually from end face 8A to bottom surface 8B.
The plane graph of perforate 6 is nonrestrictive, comprises ellipse, triangle and quadrate, and it is preferred not having anisotropic circle, and this is for improving the soft feeling of top layer material 1.
Perforate 6 can form by the method for for example production top layer material of the following stated.
As shown in Figure 2, the every part between the adjacent apertures 6 all has a curved surface to form dome protuberance.Term used herein " protuberance " is meant the peak that is positioned at part between two adjacent perforates.Top layer material 1 according to the sanitary towel of the present embodiment preferably has many continuously arranged protuberances to form the bar shaped ridge, as shown in Figure 3.In the material of top layer shown in Figure 3, the almost linear continuous arrangement of many protuberances forms bar shaped ridge 2,2 ..., between adjacent two ridges 2, forming ditch 4, ridge 2 and ditch 4 are staggered so that flat can not be provided.Ridge 2 is bent to form convex and ditch 4 bends to spill, and ditch 4 has many intervals perforate 6.This arrangement of ridge 2 and ditch 4 is preferred, because it can both provide anisotropy in the flexural property (for example volume flexibility) with ridge 2 and ditch 4 parallel directions and vertical direction, thereby the comfortableness of top layer material 1 and sense of touch is further improved.
The arrangement style right and wrong of perforate 6 in the ditch 4 are restrictive.For example, perforate can be the zigzag arrangement as shown in Figure 4.In this case, the preferred 0.4-40mm of 6 distances of every adjacent apertures (spacing) N that in each ditch 4, arranges, more preferably 1.5-8mm.If spacing N is less than 0.4mm, the circumference of perforate 6 will be not enough to form the edge.If spacing N is greater than 40mm, then perforate 6 is too rare and to cause the body fluid infiltration not enough.Thus, above-mentioned scope is preferred.
To shown in Figure 4, ridge 2 and ditch 4 are staggered as Fig. 2, and ditch 4 is that face by successive ridge 2 forms.As shown in Figure 2, distance (spacing) L is preferably 1.0-6.0mm between the adjacent ridge 2, more preferably 1.7-3.7mm.The preferred 1.0-6.0mm of distance (spacing) M, more preferably 1.7-3.7mm between the two adjacent ditches 4.
In the A district, the direction of ridge 2 and ditch 4 does not need vertical or horizontal consistent with sanitary towel 100, promptly the top layer material can its ridge and the direction of ditch as vertical use of sanitary towel 100 and there is not any problem.Same top layer can not have any problem as the horizontal use of sanitary towel 100 perpendicular to the direction of its ridge and ditch yet.
The direction of A district median ridge 2 and ditch 4 can with or the machine direction with preparation raw material non-woven fabrics is not consistent.
In the A district, on an assigned direction, the height of the protuberance 5 between the adjacent apertures 6,6 (as the height of P position among Fig. 4) is different with the height (as the height of Q position among Fig. 4) perpendicular to the protuberance between the adjacent apertures on this direction 65.The direction that the gradient of this bump height can make its energy controlling liquid absorb and spread.For example, can be slightly high by swelling between adjacent apertures on the perpendicular direction of the protuberance between the adjacent apertures that makes predetermined direction, so that liquid spreads with specific direction.
After carrying out aforesaid operations, promptly make the altitudinal gradient of protuberance and form ridge, just the controlling liquid direction that absorbs and spread more effectively.For example, it is slightly high to make protuberance arrange between the adjacent apertures of the perpendicular direction of aspect ratio that forms ridge bump height continuously with certain direction, and then liquid is easy to flow along ridge, and effectively suppress liquid to the flowing of the perpendicular direction of ridge.
Except said structure, the A district also has the graded of a thickness on its cross-wise direction.Because the fibre weight that exists in the top layer material 1 all is basic equating in every part, provides layer material thickness gradient to mean the variation of fibre density in the per unit area on layer material cross section.Just lower than the thickness portion fibre density in the A district, fiber is less to provide soft feeling.On the other hand, thin part fibre density is higher among the A, and fiber is closeer then feels harder.
As shown in Figure 5, top layer material 1 is as follows at thickness gradient variation pattern on its cross section: (this paper only refers to work at the thickness of bump pad a) near the layer material maximum ga(u)ge a protuberance sometimes, and the pass that the thickness c on the base of perforate 6 reaches between the thickness b three of the mid portion between thickness and the base is a＞b＞c.Be on top layer material 1 cross section the thickest position the protuberance near and the thinnest position on the perforate base, thickness is placed in the middle between the thin and the thickest position.In addition, material 1 thickness in top layer successively decreases to the base from protuberance.This thickness structure can further be improved cushioning effect and soft feeling.
Above-mentioned thickness relationship a＞b＞c provides a capillary force variable gradient.Effectively absorb liquid for changing, need bigger graded by gradient of capillary pressure.Since in the A district graded of capillary force by as above-mentioned fibre density graded cause, so need provide big fibre density gradient so that bigger gradient of capillary pressure to be provided.Thus, preferably making poor (a-c) between the layer material thickness c on layer material thickness a and perforate base of bump pad is 200 μ m or higher to form big capillary force variable gradient for example.Because high density part (mainly being the perforate base) fiber is closeer, the liquid on surface, A district absorbs by capillary force, and is imported into absorber soon.On the other hand, low-density part (being mainly protuberance) fiber is few, thereby a little less than the capillary force, and it is surperficial to be difficult to return the A district in case liquid is absorbed in the absorber.Like this, the structure that is made of intensive part and sparse part provides the gradient of capillary force in single structure, advantageously reduces thereby remain in lip-deep liquid, feels dryer and comfortableer.Preferred thickness difference (a-c) is 200-500 μ m.
Further, the macroscopic density structure that the A district has makes the hard part (high density part) of the part (low-density part) that has medium softness and soft feeling in the simple layer material and compressive resistance compression, thereby makes whole layer material have the buffering character of appropriateness.Even under the pressure compression, the hard part also can keep original thickness in the A district, thereby the body fluid that more effectively prevents to be absorbed in the absorber flows backwards.
In a preferred embodiment of above-mentioned density structure, be 400-800 μ m at the layer material thickness a of bump pad, the layer material thickness c on the perforate base is 50-300 μ m, near the layer material thickness of the mid portion swelling between part and the base is 200-600 μ m.
Above-mentioned density structure optimization can obtain by the method for following production top layer material.
This density structure is also closely related with the diameter of perforate 6.As shown in Figure 5, the opening diameter d that (is preferably circle or ellipse) on the base is preferably 0.5-2.0mm, if diameter d is less than 0.5mm, then this density structure may not produce enough capillary forces, if diameter d is greater than 2.0mm, tight gathering almost forms thin film to fiber on the base, can not provide enough spaces that liquid is easily passed through.Therefore, above-mentioned diameter range is preferred, and diameter d is 0.7-1.5mm more preferably.
This density structure is also closely related with the thickness in A district.As shown in Figure 5, the thickness in A district is preferably at 0.5g/cm
2Load is 0.6mm or bigger down." at 0.5g/cm
2Thickness under the load " be equivalent to the thickness in A district when touching.The A district can have the flexibility of improvement when 0.6mm or bigger thickness t bulkiness.If the basic weight of top layer material 1 increases to for example 60-100g/m
2, be 0.6mm or bigger with the thickness t in easier assurance A district, but sense of touch is destroyed so sometimes.In the sanitary towel of the present embodiment, even the basic weight when top layer material 1 is too not heavy just the opposite, also can reach by the three dimensional structure of perforate and more easily make thickness t by the three dimensional structure that swells between perforate is 0.6mm or bigger.Thickness t is preferably 0.6-2.0mm, more preferably 0.6-1.5mm.
Except that said structure and various physical property, the A district also has following compressive features.Be that the A district preferably has at 0.5g/cm
2Load reaches the repulsive force that 0.5-30g is arranged for the thickness of 0.6-2.0mm down when being depressed into thickness for 0.6mm.Even the A district with compressive features like this also can keep said structure under the pressure that is subjected to when using when sanitary towel is actual, thereby guarantee the softness of appropriateness and cushioning effect and satisfy above-mentioned various physical property simultaneously.
Term " repulsive force " is meant the measuring body counteracting force in A district herein, and repulsive force described herein can be measured with the KES pressure detecting instrument.To be that a kind of structure retentivity of and A district and resiliency are upright connect relevant power to repulsive force, if repulsive force less than 0.5g, in using sanitary towel, can not keep its performance thereby the A plot structure is easy to wrinkle, and cushioning effect is lost and can only be felt harder, and good sense of touch can not be provided.On the other hand, if repulsive force greater than 30g, then A district surface softness is relatively poor, and a kind of coarse sensation is arranged in use.Repulsive force is preferably 7-25g, more preferably 7.5-20g.
The A district also preferably has following compressive features except said structure and various physical property, promptly the A district is at 0.5g/cm
2Preferably have the 0.6-2.0mm thickness t under the load, the repulsive force F of 3-10g was arranged in compression in 30% o'clock.A district with compressive features like this has the protuberance cushioning effect of further improvement, thereby further improves soft feeling and smooth surface sense.
Term " compression 30% " is meant at 0.5g/cm
2Load thickness down reduces 30% compression.Represent by following formula (I) at 30% time thickness of compression:
0.5g/cm
2Thickness [mm]-30/100 * (0.5g/cm under the load
2Thickness under the load) [mm]=70/100 * (0.5g/cm
2Thickness under the load) [mm] ... (I)
As repulsive force F during, gently press the A district to have a kind of buffering of appropriateness in the 3-10g scope.If repulsive force is less than 3g, the top layer material is easy to be compressed and whole a kind of thin and hard sensation is arranged.On the other hand, if repulsive force F greater than 10g, then structure has a kind of hard or harsh feeling, and can not improve sense of touch.
Above-mentioned repulsive force is more preferably between 3-8g, between 3.5-7.5g.
Important being not only strengthens the liquid-absorbent that passes through perforate in the A district, thereby and will provide the capillary force variable gradient to improve the absorbability of liquid by forming a suitable density structure.The percent opening of top layer material is preferably 7% or more thus.If percent opening is less than 7%, the fibril aggregation on perforate base and can not form suitable density structure well.Percent opening is 10-20% more preferably.This paper term " percent opening " be meant when the top layer material when end face 8A is projected to bottom surface 8B, perforate total projection area accounts for the percentage ratio of A district area.The method of measuring percent opening will be set forth in the back.
Preferably in the A district, constitute hydrophilic continuous or interim decline from the end face to the bottom surface of the fiber in A district.In conjunction with above-mentioned density structure, so the hydrophilic variable gradient makes liquid-absorbent further improve and more effectively prevent to have absorbed the backflow of liquid on cross-wise direction.Without limitation, can throw the net by for example respectively preparing, thereby and obtain the raw material non-woven fabrics to improve hydrophilic with net is overlapping from level to level from several fibers with different hydrophilic for the hydrophilic variable gradient is provided.
Equally preferably in the A district, constitute diameter continuous or interim decline from the end face to the bottom surface of the fiber in A district.In conjunction with above-mentioned density structure, so the vary in diameter gradient makes liquid-absorbent further improve and more effectively prevent to have absorbed the backflow of liquid on cross-wise direction.Without limitation, can throw the net by for example respectively preparing, thereby and obtain the raw material non-woven fabrics to improve fibre diameter with net is overlapping from level to level from several fibers with different fibre diameters for the hydrophilic variable gradient is provided.
Equally preferably A is made up of two-layer nonwoven in the district at least, wherein only is bonded together at the perforate periphery between nonwoven layer and the layer.The A district so architecture advances absorb the Rong Zangli of liquid, perusal is dryer and comfortableer.Owing to the intrinsic property that has all kept non-woven fabrics except the zone of perforate periphery, said structure has been improved sense of touch (soft feeling and pliability).
Set forth the B district in the top layer material 1 of sanitary towel 100 shown in Figure 1 below.
The B district longitudinally is positioned at each side setting of sanitary towel 100, and embossed.
The embossing in B district is carried out through a pair of heating embossing cylinder by making non-woven fabrics, and the heating embossing cylinder is made up of an embossing cylinder and a standby roller usually.The style of embossing does not have particular determination, and is optional from circular, square according to required smoothness in B district or embossing rate (aftermentioned), rhombus and above-mentioned combination.
The embossing rate in B district is preferably 8-70%, and more preferably 10-50% most preferably is 15-40%, and this is for the surface flatness that obtains aforesaid improvement and has prevented what fine hair was set.
For the flatness that obtains improveing and prevent that fine hair, the protruding quantity that the B district is formed by embossing are decided to be according to the embossing rate and on average have 10-50 individual in the every 1cm diameter circle in arbitrary position, B district.
Prevented fine hair for the flatness that obtains improveing reaches, B district thickness is at 0.5g/cm
2Be preferably 0.1-0.6mm under the load, more preferably 0.2-0.5mm.
To describe below and produce the method for optimizing of sanitary towel's top layer material of embodiment as mentioned above.
At first, will form B district as the raw material non-woven fabrics embossing of top layer material, embossing can be carried out as the whole zone of mentioning later at the raw material non-woven fabrics, but preferred corresponding to the zone in B district but not carry out corresponding to the zone in A district.Some raw material non-woven fabrics that are suitable for are precreping and providing.So the raw material non-woven fabrics can directly use or use through further embossing.
The embossing condition will be according to the basic weight of raw material non-woven fabrics, forms fiber type etc. and decides, and embossing under 80-260 ℃, is carried out under the 10-100kg/cm line pressure usually.
Then, the non-woven fabrics of embossing is inserted between first and second punch dies punching to form the A district.Only will insert between first and second punch die corresponding to the zone in A district.
First punch die be the many rows of band along the pyramid of non-woven fabrics moving direction or the needle-like roller of conical vertical pin, second punch die is the protrusion roller of band projection, described projection can with the vertical pin matched in clearance of first punch die.
When using first and second punch die to make up the A district, the vertical pin on the needle-like roller is arranged along the moving direction of non-woven fabrics, and is parallel between row and row.The projection of protruding on the roller is engaged in the aligned gaps of vertical pin.
Like this, more easily form protuberance, and perforate can be suppressed and forms by the pin on the pin type roller on non-woven fabrics by the projection of protruding roller.Preferably the pin type roller is heated to 60-260 ℃,, thereby makes this position fibre density than other position height so that can part deliquescing or partial melting corresponding to the non-woven fabrics of every perforate periphery.
For improving the formation of protuberance, one preferred the processing is through passing through some pre-heating means known in the art before the roller at non-woven fabrics, as non-woven fabrics being blown into hot-air (as 60-260 ℃) or blowing non-woven fabrics on every side, with the non-woven fabrics preheating at preheating roller tube (60-260 ℃).
Can carry out successively or carry out simultaneously as above-mentioned in respective regions formation A district and B district.When perforate after the same area embossing the time, interfibrous bondingly follow-up perforate is provided and advantageously unclamps by what embossing formed, condition is so to select embossing condition and boring method.Thereby whole zone that can embossing raw material non-woven fabrics subsequently only with the corresponding site perforate of A district.
With reference now to Fig. 6 description, second kind of embodiment of the present invention.Fig. 6 is the major part enlarged drawing (corresponding with Fig. 5) in the sanitary towel of second kind of embodiment used top layer material A district.The difference of second kind of embodiment and first kind of embodiment will only be set forth.Be applicable to second kind of embodiment with the description content of first kind of embodiment something in common.Consistent at label shown in Fig. 6 with the label of Fig. 5 same parts.
Except the bottom surface 8B of non-woven fabrics corresponding to the position of each protuberance 5 towards end face 8A projection, the structure in A district is almost identical with first kind of embodiment in second kind of embodiment.In this embodiment, same, near the layer material maximum ga(u)ge a protuberance, the pass that the thickness c on the base of perforate 6 reaches between the thickness b three of the mid portion between thickness and the base is a＞b＞c.
Because bottom surface 8B is outstanding to end face 8A at protuberance 5 places, so increase in protuberance 5 place's fibre densities.Even the result is when the pressure that the top layer material is subjected to user when using, thereby also can keep swelling 5 profile makes the contact area maintenance of A district and skin less, thereby can improve the soft feeling and the cushioning effect in A district.Moreover, thereby can prevent that body fluid by absorbent body refluxes guarantees the dry feeling of improvement.
The sanitary towel of second kind of embodiment employed top layer material can be used with the production method same way as of sanitary towel's top layer material of first kind of embodiment and produce.Distinguishingly, the engagement degree in the gap between the pin of projection that the protuberance A in A district can be by regulate protruding roller and pin type roller forms.
Describe absorbent commodity of the present invention through the reference embodiment preferred, but need be appreciated that and the invention is not restricted to these embodiments, under its spirit and scope, can make variations and modifications.
For example, the A district can not need account for the whole vertical total length of sanitary towel, and for example it can only be located at discharge opeing place of regulation position such as user.
Equally, the B district need not account for the whole vertical total length of sanitary towel yet, its can only be located at the regulation position as with the maximum positions of user contact skin (as perineal position).
It is " Z " font that the arrangement of A district perforate is not limited to, and can be grid-like or any other form.
Absorbent commodity of the present invention does not include only sanitary towel, comprises disposable diaper yet, similar articles such as sanitary belt, expansion reason breast pad.
In sum, according to the present invention, thereby can prevent that the top layer material from playing the stimulation of fine hair minimizing to user skin, making absorbent commodity is softish to skin, is more suitable for using.
In addition, the invention provides a kind of very dry and comfortablely, do not have the absorbent commodity of uncomfortable sticking sense.
Sanitary towel of the present invention is further described reference example, but the invention is not restricted to this.
Embodiment 1-5 and comparative example 1-3
With PET/PE core/sheath type composite fibre (fibre length: 51mm; Fineness: 2 daniers) be carded to fleece, bonding with the hot-air heat of adsorption subsequently to obtain the raw material non-woven fabrics.
The embossing under following table 1 listed condition of raw material non-woven fabrics also is formed with the perforate of structure as shown in Figure 5 with above-mentioned pin type roller and protruding roller perforate, to obtain the top layer material.The physical property of gained top layer material is shown in table 1.Physical property shown in the table 1 can followingly be measured.
Adopt gained top layer material to prepare sanitary towel as shown in Figure 1.The width in A district accounts for 70% of main body overall width, and B district overall width accounts for 30% of body width.
The embossing rate
The top layer material thoroughly is soaked in the aqueous solution of the red No.2 of food dye of 0.5wt%, and places on the box of a light and illuminate.Use Nippon Avionics Co., the top layer material that the image analyzer " EXCELL " that Ltd produces analysis is illuminated.Process the image into black and white two color images, white portion is equivalent to the zone (being equivalent to bump pad) do not flooded by aqueous solution, and the percentage rate that white portion accounts for the gross area promptly is equivalent to the embossing rate.
A district thickness
The A district of top layer material is prepared into a test piece with the thickness direction cutting, and takes cross section amplification picture.From picture, measure thickness a shown in Figure 5, b, c (μ m).The average of measuring 5 place's numerical value is representative value.Measurement is upward to stipulate to carry out on the tangent vertical direction of (as measuring thickness c on the perforate base) of position with end face 8A (or inwall 10).
At 0.5g/cm
2Thickness under the load
Use KES pressure tester (Inc. produces for KES FB-3, Katotech) with conventionally test pattern test material A district, top layer and B district until 50g/cm
2Pressure characteristic under the load.Read out in 0.5g/cm from calibration record paper
2Thickness t (mm) under the load.
Opening diameter
Use is by Nippon Avionics Co., and the image analyzer " ExcELL " that Ltd. produces analysis is fixed on the material A district, top layer on the black base.Flame Image Process on the screen is become the black and white two dimensional image, and its white portion is equivalent to perforate.Regard white portion as circle, measure the diameter d (mm) of this round diameter to obtain perforate.
Percent opening
Use is by Nippon Avionics Co., and the image analyzer " EXCELL " that Ltd. produces analysis is fixed on the material A district, top layer on the black and white base.Measure black image district area on the screen and white image district area and account for the percentage rate of the gross area, be percent opening (%) with the white portion that obtains being equivalent to perforate.
The debris scale of construction
The test piece of one 50mm * 50mm is downcut by the A district and weigh.Test piece is dipped in 75% glycerite fully dipping.Test piece is taken out from solution, and end face is 70mm * 70mm with 5 thickness up, every basic weight 40g/m
2Absorption paper be placed in the test piece.On absorption paper, give simultaneously test piece 10g/cm
2Load.After executing heavy 60 seconds, the test piece of weighing again.Be the debris scale of construction with the difference of initial weighted.If the debris scale of construction is 0.2g or still less, the A district then is the excellent properties as the top layer material of absorbent commodity.
Flexibility
10 people do not detect by an unaided eye and touch the A district with hands, and according to following 5 grades from soft feeling, cushioning effect and similar aspect are judged flexibility comprehensively.Get the meansigma methods of the grade that 10 people provide.Grade is high more, and then flexibility is good more.
2-difference 1-extreme difference among the good 3-of the excellent 4-of 5-
Play the evaluation of fine hair
With a heavy 350g, diameter 70mm, and the rotation disc that covers with 0.5mm polyurethane foam sheet (being produced by Bridgestone Corp) is fixed on a certain position of swingle, the rotating shaft that coils in this position moves with 20mm from its center.The test piece of the 170 * 170mm that is downcut by the B district is fixed on the base, and polyurethane foam sheet is being tried between material and the base.Rotation disc is placed in the test piece, bar is clockwise rotated secondary and rotate counterclockwise secondary so that rotation disc speed with 3 seconds of every circle in test piece is slided.
Tried the back and played the fine hair degree to judge as following grade:
2-difference 1-extreme difference among the good 3-of excellent (no fine hair) 4-of 5-
Table 1
| Basic weight (g/m 2) | Embossing | Embossing rate (%) | A district floor material thickness (μ m) | At 0.5g/cm 2Load is thickness (mm) down | The A district | The A district | The B district | ||||||||||
| Temperature (℃) | Line pressure (kg/cm) | The A district | The B district | a | b | c | a-c | The A district | The B district | Opening diameter (mm) | Percent opening (%) | The debris scale of construction | Flexibility | Play the fine | |||
| Embodiment | |||||||||||||||||
| 1 | 25 | 125 | 38 | 0 | 21 | 400 | 250 | 90 | 310 | 1.36 | 0.31 | 1.0 | 12 | 0.15 | 4.1 | 4 | |
| 2 | 23 | 125 | 15 | 3 | 18 | 330 | 250 | 90 | 240 | 1.24 | 0.40 | 1.2 | 17 | 0.11 | 4.4 | 4 | |
| 3 | 25 | 125 | 38 | 4 | 30 | 300 | 200 | 95 | 205 | 1.31 | 0.35 | 1.3 | 18 | 0.14 | 4.1 | 5 | |
| 4 | 26 | 125 | 38 | 7 | 36 | 295 | 205 | 75 | 220 | 1.24 | 0.28 | 1.2 | 17 | 0.12 | 4.0 | 5 | |
| 5 | 24 | 125 | 50 | 3 | 23 | 325 | 190 | 80 | 245 | 1.26 | 0.47 | 1.2 | 16 | 0.14 | 4.2 | 4 | |
| The comparative example | 1 | 25 | - | - | 0 | 650 | - | - | - | 0.65 | - | - | 0.33 | 3.5 | 3 | ||
| 2 | 21 | - | - | 0 | 190 | 80 | 80 | 110 | 0.26 | 0.27 | 4 | 0.40 | 2.5 | 3 | |||
| 3 | 25 | 125 | 38 | 21 | 310 | - | - | - | 0.31 | - | - | 0.21 | 2.6 | 4 | |||
The result may be obvious that by table 1, the top layer material district soft feel of embodiment 1-5 and only residual therein less liquid, and the B district feels smooth and the difficult fine hair that rises.
On the contrary, comparative example 1 top layer material (it is a raw material non-woven fabrics itself) residual considerable liquid and easily play fine hair.Comparative example 2 top layer material is only done the perforate processing and also has been easy to fine hair and has approached residual considerable liquid because a layer material crossed.Comparative example 3 top layer material only forms the B district, also has a large amount of residual liquids.
The application is based on JIUYUE in 1996 flat 8-250704 of Japanese Patent Application in Japan's special permission Room application on the 20th, and it draws at this paper in full and is reference.
Claims (7)
1, a kind of absorbent commodity comprises a fluid permeability skin contact surface, the liquid retainability absorber of the non-skin contact surface of a liquid impermeability and between described skin contact surface and non-skin contact surface, wherein:
Described skin contact surface is by comprising first district with many perforates and not having the non-woven fabrics in second district of perforate to form;
Described first district vertically is positioned at its core along described absorbent commodity, perforate on the described non-woven fabrics is extended to the bottom surface from the end face of described skin contact surface, so all there is described non-woven fabrics to hold around each described perforate, the inwall of each perforate forms and the successive one side of end face, and the part between every adjacent apertures all has the protuberance that a curved surface forms dome;
Described second district vertically is positioned at absorbent commodity both sides and contiguous with first district along described absorbent commodity, and embossing, and the embossing rate in second district is 10-50%;
The ratio that described first sector width accounts for the main body overall width is between 50-90%, and the overall width in described second district of main body both sides accounts for the ratio of main body overall width between 10-50%;
The percent opening in described first district is 7-20%, and the diameter d of described perforate is 0.5-2.0mm on described base; And
Wherein at the non-woven fabrics maximum ga(u)ge a of described bump pad, be a＞b＞c at the nonwoven thickness c on the base of described perforate and the pass between the thickness b three at the mid portion between thickness and the base.
2, absorbent commodity as claimed in claim 1, the fiber of wherein forming non-woven fabrics is grouped into by two kinds of one-tenth at least, and first kind of composition is lower than the fusing point of second kind of composition.
3, absorbent commodity as claimed in claim 2, wherein said non-woven fabrics comprises two-layer at least, and the upper strata contains the first kind of composition that is no more than 50% (weight), and lower floor contains the first kind of composition that is no less than 50% (weight).
4, absorbent commodity as claimed in claim 1, the bottom surface of wherein said non-woven fabrics at each ridge to the end face projection.
5, absorbent commodity as claimed in claim 1, wherein said second district embossing rate is 15-40%, described first district embossing rate is 7% or still less.
6, absorbent commodity as claimed in claim 1, the thickness in wherein said first district is 0.6-2.0mm under the 0.5g/cm2 load.
7, absorbent commodity as claimed in claim 1, the diameter of fiber of wherein forming described non-woven fabrics first district are from end face to the bottom surface seriality or interim the reduction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP250704/1996 | 1996-09-20 | ||
| JP25070496A JP3408078B2 (en) | 1996-09-20 | 1996-09-20 | Absorbent articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1178101A CN1178101A (en) | 1998-04-08 |
| CN1204865C true CN1204865C (en) | 2005-06-08 |
Family
ID=17211811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97117018 Expired - Fee Related CN1204865C (en) | 1996-09-20 | 1997-09-19 | Absorbent article |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3408078B2 (en) |
| CN (1) | CN1204865C (en) |
| ID (1) | ID19596A (en) |
| TW (1) | TW374715B (en) |
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| EP0983758A1 (en) * | 1998-09-03 | 2000-03-08 | The Procter & Gamble Company | Strong and soft apertured nonwoven web |
| JP3616728B2 (en) * | 1999-01-19 | 2005-02-02 | ユニ・チャーム株式会社 | Body fluid absorbent article |
| JP3748763B2 (en) * | 2000-09-27 | 2006-02-22 | ユニ・チャーム株式会社 | Absorbent articles |
| JP3609361B2 (en) | 2000-10-12 | 2005-01-12 | 花王株式会社 | Three-dimensional sheet material |
| JP4167404B2 (en) * | 2001-04-18 | 2008-10-15 | 大王製紙株式会社 | Sanitary napkin |
| JP4953265B2 (en) * | 2001-07-16 | 2012-06-13 | 大王製紙株式会社 | Absorbent articles |
| JP4628603B2 (en) * | 2001-07-25 | 2011-02-09 | 大王製紙株式会社 | Absorbent articles |
| EP1283028B1 (en) | 2001-08-10 | 2008-03-05 | Kao Corporation | Topsheet for absorbent article |
| US7601415B2 (en) | 2001-12-03 | 2009-10-13 | Tredegar Film Products Corporation | Absorbent device using an apertured nonwoven as an acquisition distribution layer |
| JP3611838B2 (en) | 2001-12-28 | 2005-01-19 | 花王株式会社 | Top sheet for absorbent articles |
| JP4369647B2 (en) * | 2002-07-23 | 2009-11-25 | 大王製紙株式会社 | Absorbent articles |
| US7144831B2 (en) * | 2002-07-26 | 2006-12-05 | Polymer Group, Inc. | Three-dimensional nonwoven substrate having sub-millimeter orifice structure |
| JP4052906B2 (en) * | 2002-09-09 | 2008-02-27 | 花王株式会社 | Non-woven |
| JP4198978B2 (en) * | 2002-12-05 | 2008-12-17 | ユニ・チャーム株式会社 | Long absorbent article |
| JP2005133277A (en) * | 2003-07-02 | 2005-05-26 | Tredegar Film Products Corp | Flexible form fitting web |
| TWI238711B (en) * | 2003-09-19 | 2005-09-01 | Kao Corp | Topsheet of absorbent article and absorbent article having the same |
| JP4467405B2 (en) * | 2004-11-02 | 2010-05-26 | 花王株式会社 | Sanitary napkin |
| JP4606286B2 (en) * | 2005-09-20 | 2011-01-05 | 花王株式会社 | Absorbent articles |
| JP5054962B2 (en) * | 2006-11-06 | 2012-10-24 | ユニ・チャーム株式会社 | Absorbent articles |
| JP5074977B2 (en) * | 2008-03-27 | 2012-11-14 | 大王製紙株式会社 | Absorbent articles |
| JP5197147B2 (en) | 2008-05-15 | 2013-05-15 | ユニ・チャーム株式会社 | Absorbent articles |
| CN102178584A (en) * | 2011-03-15 | 2011-09-14 | 杭州唯可机械制造有限公司 | Three-dimensional vertical nonwoven fabric |
| US9327473B2 (en) | 2012-10-31 | 2016-05-03 | Kimberly-Clark Worldwide, Inc. | Fluid-entangled laminate webs having hollow projections and a process and apparatus for making the same |
| US9480608B2 (en) | 2012-10-31 | 2016-11-01 | Kimberly-Clark Worldwide, Inc. | Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections |
| US9480609B2 (en) | 2012-10-31 | 2016-11-01 | Kimberly-Clark Worldwide, Inc. | Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections |
| US10070999B2 (en) | 2012-10-31 | 2018-09-11 | Kimberly-Clark Worldwide, Inc. | Absorbent article |
| US9474660B2 (en) | 2012-10-31 | 2016-10-25 | Kimberly-Clark Worldwide, Inc. | Absorbent article with a fluid-entangled body facing material including a plurality of hollow projections |
| JP6202967B2 (en) * | 2013-09-30 | 2017-09-27 | ユニ・チャーム株式会社 | Absorbent articles |
| JP6083909B2 (en) * | 2014-12-19 | 2017-02-22 | 花王株式会社 | Absorbent articles |
| CN114836902A (en) * | 2015-07-31 | 2022-08-02 | 宝洁公司 | Shaped nonwoven fabric |
| CN105748208A (en) * | 2016-02-19 | 2016-07-13 | 孙泽坤 | Anti-bacteria fabric cloth cover sanitary towel |
| CN110248628A (en) * | 2017-01-31 | 2019-09-17 | 宝洁公司 | Molding supatex fabric and product including the fabric |
| JP7458784B2 (en) | 2017-01-31 | 2024-04-01 | ザ プロクター アンド ギャンブル カンパニー | molded nonwoven fabric |
| DE112018000611T5 (en) * | 2017-01-31 | 2019-12-12 | The Procter & Gamble Company | Molded fleece |
| RU2713351C1 (en) | 2017-02-28 | 2020-02-04 | Кимберли-Кларк Ворлдвайд, Инк. | Method of producing laminar webs with hollow ledges and holes subjected to jet bonding |
| RU2718655C1 (en) | 2017-03-30 | 2020-04-13 | Кимберли-Кларк Ворлдвайд, Инк. | Inclusion of the area with holes in the absorbent product |
| JP7157388B2 (en) * | 2019-01-11 | 2022-10-20 | Jnc株式会社 | Perforated nonwoven fabric and its manufacturing method |
| CN111329664A (en) * | 2020-03-28 | 2020-06-26 | 广东娜菲实业股份有限公司 | Production method of bamboo fiber non-woven fabric for sanitary towel |
| JP2023529184A (en) * | 2020-06-12 | 2023-07-07 | ザ プロクター アンド ギャンブル カンパニー | Perforated nonwoven fabric and its absorbent article |
| CN113262106A (en) * | 2021-06-25 | 2021-08-17 | 大连双迪桃花卫生用品有限公司 | Sanitary napkin |
| CN115182092A (en) * | 2022-07-28 | 2022-10-14 | 厦门延江新材料股份有限公司 | Non-woven fabric with stripe protrusions on surface and absorbent product thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2974340B2 (en) * | 1989-10-20 | 1999-11-10 | 花王株式会社 | Sanitary goods surface materials |
| JPH0761350B2 (en) * | 1990-02-06 | 1995-07-05 | 株式会社瑞光 | napkin |
| JP2872729B2 (en) * | 1990-02-07 | 1999-03-24 | 花王株式会社 | Absorbent articles |
| JPH0791764B2 (en) * | 1990-05-17 | 1995-10-04 | 花王株式会社 | Nonwoven fabric, method for producing the same, and absorbent article |
| JP2849204B2 (en) * | 1990-11-21 | 1999-01-20 | ユニ・チャーム株式会社 | Surface sheet for absorbent articles |
| JPH05115504A (en) * | 1991-10-25 | 1993-05-14 | Daiwabo Create Kk | Surface member for body fluid absorbing article |
| JP3380568B2 (en) * | 1991-12-27 | 2003-02-24 | 花王株式会社 | Absorbent articles |
| JP2741816B2 (en) * | 1992-02-26 | 1998-04-22 | 花王株式会社 | Surface material of absorbent article and method of manufacturing the same |
| JP2860730B2 (en) * | 1992-03-26 | 1999-02-24 | 小林製薬株式会社 | Body fluid absorption material |
| JPH0788132A (en) * | 1993-09-28 | 1995-04-04 | Kobayashi Pharmaceut Co Ltd | Body fluid absorbing material |
| JP3065883B2 (en) * | 1994-04-15 | 2000-07-17 | 花王株式会社 | Nonwoven fabric, method for producing the same, and absorbent article |
-
1996
- 1996-09-20 JP JP25070496A patent/JP3408078B2/en not_active Expired - Fee Related
-
1997
- 1997-09-16 ID IDP973200A patent/ID19596A/en unknown
- 1997-09-18 TW TW086113507A patent/TW374715B/en not_active IP Right Cessation
- 1997-09-19 CN CN 97117018 patent/CN1204865C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1178101A (en) | 1998-04-08 |
| ID19596A (en) | 1998-07-23 |
| JPH1094558A (en) | 1998-04-14 |
| JP3408078B2 (en) | 2003-05-19 |
| TW374715B (en) | 1999-11-21 |
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