CN100436689C - Perforated sheet and method of manufacturing the sheet - Google Patents
Perforated sheet and method of manufacturing the sheet Download PDFInfo
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- CN100436689C CN100436689C CNB028282167A CN02828216A CN100436689C CN 100436689 C CN100436689 C CN 100436689C CN B028282167 A CNB028282167 A CN B028282167A CN 02828216 A CN02828216 A CN 02828216A CN 100436689 C CN100436689 C CN 100436689C
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- perforate
- layer
- nonwoven fabric
- heat
- sheet material
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/50—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by treatment to produce shrinking, swelling, crimping or curling of fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
Abstract
The present invention relates to a punched sheet (1); the thermal contracted nonwoven fabric (10) having a plurality of slits (11) is contracted such that each of these slits (11) can be expanded to form a plurality of holes (2) remain opened on the thermal contracted nonwoven fabric (10) even when no tension was exerted on it. The method of manufacturing the punched sheet according to the present invention is characterized in that the thermal contracted nonwoven fabric (10) having a plurality of slits (11) is treated with heat yet the contraction by width and length of the thermal contracted nonwoven fabric is restricted such that each of these slits (11) can be expanded and then a punched sheet (1) having a plurality of holes (2) can be obtained.
Description
Technical field
The present invention relates to perforate sheet material and manufacture method thereof, relate in detail perforated area (aperture) and percent opening greatly, weight per unit area (order is paid) is low and intensity is high perforate sheet material, and can avoid the waste of material and can make the manufacture method of the perforate sheet material of above-mentioned perforate sheet material cost-effectively.
And, the present invention relates to surficial sheets and manufacture method thereof that absorbent commodity is used, be difficult for residual lip-deep liquid, the particularly high viscosity liquid of being excreted in its surface, also be difficult for producing eczema (system レ) or macula (カ Block レ) etc.
Background technology
Formation sheet material as the disposal type body fluid absorbent article of sanitary napkin or disposal type diaper etc., general using character is stable and can the cheap nonwoven fabric of producing, and, proposed on nonwoven fabric to form the scheme that perforate is used, with the function of improving nonwoven fabric or increase new function etc.
As the perforate technology of in the past nonwoven fabric, known method has: (a) use the needle-penetration nonwoven fabric of heating or not heating and method, (b) of perforate utilize the knurling rolls of heating or not heating to make fiber conquassation under high pressure and open method that the method that forms the hole, (c) melt nonwoven fabric to carry out perforate by laser beam or flame calcination cutting or with heating stylus (adding Hot ピ Application) etc.
But, use these methods to be difficult to make perforated area (aperture) and the bigger perforate sheet material of percent opening.And the method for above-mentioned (c) has perforate hardening on every side, generation is burnt and the shortcoming of polymer drops.
As the method that obtains the bigger perforate sheet material of perforated area (aperture) and percent opening, there is a part of stamping-out to become reservation shape to form the method (punching processing) of perforate with nonwoven fabric, but in this case, not only the intensity of sheet material declines to a great extent, also can cause the waste of stamping-out part, but also must possess operation and the equipment of removing the part that is punched.
And, perforate technology as other nonwoven fabric, also have after forming slit on the nonwoven fabric, stretch this nonwoven fabric and form the method for perforate, but, just be easy in this case, owing to extend in generation distortion or broken end on the sheet material if not elastic non-woven cloth, if do not use other parts that its extended configuration is fixed, just can't keep the perforate state.
In addition, opening to have put down in writing in the clear 62-250257 communique the Japan Patent spy has this slit of the sheet material of slit to expand and the mesh members that forms to incision, but this perforate also generates by the stretched sheet material.
On the surficial sheets that the absorbent commodity of sanitary napkin etc. is used, need possess following performance and characteristic, promptly, can promptly make liquid such as the menses of being discharged or urine transfer to absorbent properties on the absorber, and with the contact-making surface softness of user's skin and the surface characteristic little to the stimulation of skin.
Past, the surficial sheets of using as absorbent commodity, that uses is the nonwoven fabric made by the whole bag of tricks or it is carried out the material handled as the perforation of reprocessing or the apertured film made by synthetic resin such as polyethylene etc., but still all can not provide and can fully satisfy these two material of above-mentioned absorbent properties and surface characteristic simultaneously.
Put down in writing in the Japanese patent laid-open 9-111631 communique (No. 3131557 communiques of patent) with many wrinkle nonwoven fabric as the nonwoven fabric that is applicable to disposal type diaper and sanitary napkin etc., the layer that will contain the layer of heat-shrinkable fiber and thermal bonding fiber and contain the non-thermal contraction fiber carries out lamination, two layer segments are engaged and after thickness direction becomes an integral body, make the layer thermal contraction that contains the heat-shrinkable fiber, thereby will form the fold of the striated (muscle shape) that constitutes by another layer on the surface.
But, even this many wrinkle nonwoven fabric though be difficult for residual lip-deep liquid, the particularly high viscosity liquid of being excreted on the surface, have the shortcoming of eczema of being easy to generate or macula etc.
In addition, the nonwoven fabric of putting down in writing in Japanese patent laid-open 9-3755 communique is the nonwoven fabric as the female parts of the face fastener (face Off ア ス Na) that is used for disposal type diaper etc., by making the side in the 1st and the 2nd bonding fibrage of localized heat carry out thermal contraction, will make the opposing party towards one side-prominent, thus the protuberance of formation rule.But this nonwoven fabric becomes relatively hard materials easily, and, fail to become and prevent the sense of discomfort that eczema causes and the abundant design of skin problem, therefore the surficial sheets of using as absorbent commodity use not quite suitable.
In addition, put down in writing a kind of disposal type diaper in Japanese patent laid-open 11-253490 communique, it is at a plurality of slits of the up one-tenth of topsheet, and this topsheet is stretched in the direction vertical with slit, and forms perforate.The perforate of this diaper also produces by the stretched sheet material.And the topsheet that forms perforate does not have sandwich construction, and its perforate is not three-dimensional.
Summary of the invention
The object of the present invention is to provide the manufacture method of a kind of perforate sheet material and perforate sheet material, this perforate sheet material is made of nonwoven fabric, and perforated area (aperture) and percent opening are very big, and surface smoothing does not have concavo-convex, and weight per unit area is low, intensity is high; The manufacture method of above-mentioned perforate sheet material is to eliminate the waste of material, thus the manufacture method of the above-mentioned perforate sheet material of cost-effective manufacturing.
The surficial sheets and the manufacture method thereof that provide absorbent commodity to use is provided, the surficial sheets that this absorbent commodity is used is difficult for residual liquid, particularly menses or the such high viscosity liquid of being drained from the teeth outwards of soft stool from the teeth outwards, and is difficult for producing eczema or macula etc.
The present invention is in order to reach above-mentioned order, the perforate sheet material is provided, heat-shrinkable nonwoven fabric with a plurality of slits is shunk, so that expanding, opens above-mentioned each slit, on this heat-shrinkable nonwoven fabric, though be formed with a plurality of under the state that does not apply tension force, the perforate also kept of perforate state when mentioning the 1st invention (below be this invention).
For achieving the above object, the invention provides the manufacture method of perforate sheet material, have on the heat-shrinkable nonwoven fabric of a plurality of slits, under the state of the contraction of width that limits this heat-shrinkable nonwoven fabric and length, by implementing heat treatment, above-mentioned each slit is expanded open, thereby make perforate sheet material with a plurality of perforates when mentioning the 2nd invention (below be this invention).
For achieving the above object, the invention provides the surficial sheets that absorbent commodity is used, with be located at the 1st layer of skin one side, with the 2nd layer that is located at absorber one side carry out lamination, and with two-layer locality combination, to form the junction surface of predetermined pattern, part beyond the 1st layer the above-mentioned junction surface becomes overshooting shape, has slit when mentioning the 3rd invention (below be this invention) on the 1st layer and/or the 2nd layer.
Description of drawings
Fig. 1 is the summary vertical view of expression perforate sheet material one embodiment of the present invention.
Fig. 2 is the schematic diagram of summary of the manufacturing installation of expression perforate sheet material shown in Figure 1.
Fig. 3 is the go into operation schematic diagram (the part perspective view that the part manufacturing installation of Fig. 2 is looked from the top) of preface of the formation operation of slit in the manufacturing process of expression perforate sheet material shown in Figure 1 and expansion.
Fig. 4 is the summary stereogram of surficial sheets one embodiment used of expression absorbent commodity of the present invention.
Fig. 5 is the schematic sectional view of the X-X line of Fig. 4.
Fig. 6 is that expression is formed at the 2nd layer slit and this slit expands the accompanying drawing that open form becomes perforate, Fig. 6 (a) be with part surface sheet material shown in Figure 4 from the 2nd layer of accompanying drawing that a side is looked, Fig. 6 (b) is the 1st layer slit is cut in expression in order to form the perforate shown in Fig. 3 (a) the accompanying drawing of pattern.
Fig. 7 (a)～Fig. 7 (c) is respectively the accompanying drawing of the example of the formation pattern of representing the junction surface.
Fig. 8 (a)～Fig. 8 (c) is respectively the accompanying drawing of better embodiment of the manufacture method of the surficial sheets used of expression absorbent commodity of the present invention.
Fig. 9 is the summary stereogram of other embodiment of the surficial sheets used of expression absorbent commodity of the present invention.
The specific embodiment
Below, better embodiment according to the present invention is described.
Be described in detail the perforate sheet material 1 of present embodiment below.
The corresponding length direction of flow direction (left and right directions of Fig. 2 and Fig. 3) (above-below direction of Fig. 1) of the heat-shrinkable nonwoven fabric when perforate sheet material 1 has with manufacturing and the width (left and right directions of Fig. 1 perpendicular with it, direction shown in the symbol W among Fig. 1), a plurality of perforate 2 forms at the length direction and the width arow of perforate sheet material 1 respectively.And each perforate 2 forms substantially elliptical, and this substantially elliptical has major axis, has minor axis at width at the length direction of perforate sheet material 1.
Even perforate sheet material 1 under the state that does not apply tension force, also can be kept the perforate state of each perforate 2.That is to say that what Fig. 1 represented is at the perforate sheet material 1 that does not apply under the tension state (nature).
Below, be example with the situation of making above-mentioned perforate sheet material 1, an embodiment of the manufacture method of perforate sheet material of the present invention is described.
10A pulls out heat-shrinkable nonwoven fabric 10 ' from raw material roller (former anti-ロ one Le), and when this heat-shrinkable nonwoven fabric 10 ' is transported continuously, goes up a plurality of slits 11 of formation by rotary cutter 3 at this heat-shrinkable nonwoven fabric 10 '.Rotary cutter 3 possesses: cutting roller 32, and it has a plurality of blades 31 that along the circumferential direction form; And accept roller 33, and itself and above-mentioned cutting roller are oppositely arranged, and the direction of each slit 11 is parallel with the flow direction of heat-shrinkable nonwoven fabric.
Then, the heat-shrinkable nonwoven fabric 10 that incision is had slit 11, import continuously in the pin tentering heater 4, in pin tentering heater 4, by the mobile pin 41 of interlock (synchronously) along with flowing of heat-shrinkable nonwoven fabric 10, under the non-shrinking state of the width that makes heat-shrinkable nonwoven fabric 10, fix the two ends of this heat-shrinkable nonwoven fabric 10, simultaneously this heat-shrinkable nonwoven fabric 10 is heat-treated, heat-treating methods also can use far infrared processing etc. except blowing hot-air.
Because above-mentioned heat treatment is, by transporting continuously, apply tension force at the flow direction of heat-shrinkable nonwoven fabric 10, therefore become the heat treatment of under the state that the length of restriction heat-shrinkable nonwoven fabric 10 is shunk, carrying out.
Here, the state that the width of so-called restriction heat-shrinkable nonwoven fabric and length are shunk is exactly to allow the heat-shrinkable nonwoven fabric partly to shrink, but can not cause the width of heat-shrinkable nonwoven fabric integral body and the state that length is shunk.This state has more than and is limited to the situation that the width that makes nonwoven fabric before and after the heat treatment (with the length on the perpendicular direction of flow direction) and length (with the length on the flow direction equidirectional) do not change fully, comprises that also width and/or length have the situation of to a certain degree dwindling.But from forming the viewpoint of the bigger perforate of perforated area and percent opening, the rate of change of the width of nonwoven fabric and length is preferably respectively in 10% before and after heat treatment.The width of nonwoven fabric and the rate of change of length are to try to achieve by width and the length of measuring the nonwoven fabric before and after the heat treatment under nature respectively.
By above-mentioned heat treatment, heat-shrinkable nonwoven fabric 10 is shunk, above-mentioned each slit 11 is expanded open, thereby form a plurality of perforates 2.
The contraction of so-called heat-shrinkable nonwoven fabric 10 (partly shrinking), different with the contraction of the width of heat-shrinkable nonwoven fabric 10 and length, it means that the part beyond the slit of heat-shrinkable nonwoven fabric 10 shrinks.
Like this, just obtaining the bigger perforate sheet material 1 of perforated area and percent opening serially is used as banded sheet material.
The perforate sheet material 1 of present embodiment has slit 11 is expanded the perforate 2 of opening and forming, because when forming this perforate, can not produce moving of fiber and the radical of minimizing fiber, therefore even when forming the bigger perforate of perforated area and percent opening, also can significantly suppress the reduction of sheet strength, compare with the perforate sheet material that forms perforate by for example stamping-out (punching processing) thus, can become the higher sheet material of intensity.
The average perforated area of a perforate of perforate sheet material of the present invention can be, for example 2～350mm
2, be preferably 10～100mm
2
And the percent opening of perforate sheet material can be, for example 5～90%, be preferably in 10～80%.
The mensuration of above-mentioned average perforated area and above-mentioned percent opening is as described below.
(assay method of average perforated area and percent opening)
Use light source (サ Application ラ イ ト SL-230K2; LPL Co., Ltd. system), support (コ ピ one ス Application De CS-5; LPL Co., Ltd. system), lens (24mm/F2.8D Nikon lens), CCD camera are (by (HV-37; Hitachi Denshi Ltd.'s system) F-MOUNT is connected with camera lens) and capure card (ス ペ Network ト ラ 3200; カ ノ one プ ス Co., Ltd. system), obtain the image of surface one side or the back side one side of surficial sheets 1.The image that obtained is used the image analysis software (edition 4 .20) of NEXUS corporate system, binary conversion treatment is partly carried out in its perforate.From trying to achieve the perforated area of each perforate through the image after the binary conversion treatment, and get these on average obtain average perforated area.Then, will just can try to achieve percent opening (%) through the summation of the perforate part area after the binary conversion treatment area divided by entire image.In the mensuration of the perforated area of each perforate relatively under the situation of difficult, can carry out on image the perforate part coated comprehensively the auxiliary processing of color etc.
In addition, the perforate sheet material 1 of present embodiment is even (for example be lower than 30g/m at the low heat-shrinkable nonwoven fabric of applying unit area weight (order is paid)
2, particularly be lower than 20g/m
2) situation under, also can form tangible perforate.
And, the perforate sheet material 1 of present embodiment, the perforate sheet material that forms perforate with the nonwoven fabric that is formed with slit is stretched is compared, and can not produced distortion or broken end and surface does not have concavo-convex level and smooth beautiful perforate sheet material.
In addition, if the manufacture method of present embodiment perforate sheet material, slit 11 is expanded open and form perforate 2, when forming this perforate, can number of fiber be reduced because of the generation fiber moves, even therefore under the situation that forms the bigger perforate of perforated area (aperture) and percent opening, compare, can significantly suppress the reduction of sheet strength with the method that forms perforate by stamping-out (punching processing).Therefore, can produce perforated area (aperture) and the great high strength perforate of percent opening sheet material 1.
And, different with the situation that forms perforate by stamping-out (punching processing), when perforate forms,, just do not need required operation of this processing and equipment etc. owing to can not generate the stamping-out sheet, therefore can suppress the waste of material, thereby make the perforate sheet material of economy.
Heat-shrinkable nonwoven fabric used in the present invention, be not specially limited if under non-tense situation, heat-treat the words of the nonwoven fabric of after-contraction, but from obtaining the viewpoint of the big perforate of perforated area (aperture) and percent opening, preferably by 80～250 degrees centigrade heat treatment under nature (non-tense situation), its width and length are shunk respectively more than 30%.
As the heat-shrinkable nonwoven fabric, can use the nonwoven fabric that for example contains the tendentiousness fiber (potential Volume Shrink Xian Victoria) that curls.The tendentiousness fiber that curls is the fiber with following such retractable property,, before being heated, can carry out the same processing of fiber used with nonwoven fabric in the past that is, and, by heating, can present spiral helicine rolling up with predetermined temperature.Curl the tendentiousness fiber by being that the eccentric core-sheath-type composite fibre (eccentric core Qiao Xing Complex He Xian Victoria) or the parallel composite fiber (サ イ De バ イ サ イ ド Xing Complex He Xian Victoria) of composition formed to have two kinds of thermoplastic, polymeric materials of different shrinkage factors for example.For example, No. 2759331 communique specifications of Japanese kokai publication hei 9-296325 communique and Japan Patent are put down in writing.
When use contains the nonwoven fabric of the tendentiousness fiber that curls, can obtain having inotropic, soft perforate sheet material.And, for the heat-shrinkable nonwoven fabric, can use the nonwoven fabric that also contains other fiber with curling tendentiousness fiber, for example, the fiber of artificial silk (rayon), cotton, hydrophilic acrylic acid fibrid etc.In the heat-shrinkable nonwoven fabric heat rolling up property fiber to contain proportional be that weight ratio particularly is preferably between 50～100% more than 30%.
Manufacture method as the nonwoven fabric that contains the tendentiousness fiber that curls, can enumerate and utilize ventilation (air through), warm-up mill, ultrasonic wave, spinning machine (ス パ Application レ one ス) etc. that web (カ one De ウ エ Block) is processed and make the method for nonwoven fabric, or spunbond (ス パ Application ボ Application De) method, air lay (エ ア レ イ) method, melt and spray (メ Le ト Block ロ one Application) method, wet method etc.
Perforate sheet material of the present invention can be used for various uses, the not special restriction of its purposes, for example, can be used for the body fluid absorbent article of sanitary napkin, incontinence pad, disposal type diaper etc. constituent material (surficial sheets, be arranged between surficial sheets and the absorber with the sheet material that increases liquid diffusivity and permeability or intensity etc.), be installed in the constituent material of the cleaning sheet material that uses on the cleaning thing, the sheet material that is used to cook etc. etc.
Perforate sheet material of the present invention, carrying during from manufacturing and the intensity of using are considered, the maximum point load of MD direction (the 2nd layer flow direction, operating direction) is preferably in the scope more than or equal to 10N, particularly more preferably greater than equaling 15N, CD direction (direction vertical with the MD direction) maximum point load is preferably in the scope more than or equal to 0.5N, particularly more preferably greater than equaling 1N.The assay method of maximum point load, embodiment is described as described later.
More than, although understand each embodiment of perforate sheet material of the present invention and manufacture method thereof, but the present invention's (the 1st, the 2nd invention) is not limited in above-mentioned embodiment.
For example, heat treatment to heat-shrinkable nonwoven fabric 10, also can replace the pin tentering annealing device by using other device, for example, when using the ventilation annealing device, utilize hot blast,, it is heat-treated the heat-shrinkable nonwoven fabric being pressed under the online state (state of the contraction of limited length and width); When using the warm-up mill heater, when applying tension force, sheet material is rolled by warm-up mill, thus, just can under the state of the contraction of limited length and width, heat-treat, and, can use these devices separately, perhaps these be installed two or more combinations and use.
And, form device as the slit that on the heat-shrinkable nonwoven fabric, forms slit, except using rotation stamping knife (ロ one リ one ダ イ カ Star one), can also use and divide equally cutter (シ エ ア one カ Star one), laser cutter, ultrasonic cutter etc.And, slit is not limited in and is formed on the direction parallel with the flow direction of heat-shrinkable nonwoven fabric, for example, also can be formed on the side upwardly extending perforate perpendicular with flow direction, perhaps the direction of this flow direction inclination (for example directions of 45 degree) goes up the perforate of extending relatively, can also form criss-cross slit.Can be by shape that changes slit and the perforate that direction obtains required form.
The surficial sheets 110A that uses as the absorbent commodity of the present invention (the 3rd invention) embodiment (the 1st embodiment), as Fig. 4 and shown in Figure 5, have the 2nd layer 102 that is arranged on the 1st layer 101 of close skin one side and is arranged on close absorber one side, two-layer 101,102 parts are engaged, form the junction surface 103 (with reference to Fig. 7 (a)) of network shape pattern (predetermined pattern).
Each junction surface 103 of present embodiment is overlooked to circle, is formed discontinuously.Junction surface 103 is compared with the other parts of surficial sheets 110A by densification, and thickness is less, and density is bigger.
With the area occupation ratio at the corresponding junction surface 103 of the area of surficial sheets (will be corresponding with the unit are of surficial sheets, the ratio of the total area at contained junction surface 103 in this unit are, the value of recently representing with percentage, before making the 2nd layer of contraction, measure), from following each point is 3～50% preferable, be preferably 5～35%, thereby the premises is to make the 1st layer 101 and the sufficiently high point of the 2nd layer 102 engage and the point that can be presented large volume (high high さ) by the 1st layer of three-dimensional shape that fully forms overshooting shape respectively.
Be made of aggregate of fibers for the 1st layer 101, the part with beyond the 2nd layer 102 the junction surface 103 forms overshooting shape to skin one side.That is to say that surficial sheets 110A has a plurality of enclosed areas, junction surface that this zone is made of above-mentioned pattern 103 surrounds and forms, in this closed area, and the 1st layer of 101 overshooting shape (with reference to Fig. 4 and Fig. 5) that forms the dome shape.The 1st layer of 101 inside that forms the part (protuberance) 104 of overshooting shape, be full of and constituted the 1st layer fiber, and the 1st layer 101 and the 2nd layers 102 interface in the part beyond the junction surface 103 is not though have the combined state that connects airtight across whole zone that forms.The shape of the 1st layer of formed overshooting shape mainly determines by constituting the 1st layer 101 the form of aggregate of fibers and the pattern at junction surface 103.
The 1st layer 101 is to be made of the aggregation with the fiber that constitutes the 2nd layer 102 fiber variety classes and/or configuration.
By the 1st layer 101 of surficial sheets and the height T (with reference to Fig. 5) of the jut (protuberance) 104 that forms is seen as 0.3～5mm from the viewpoint that gives sufficient compression of surficial sheets and large volume (high high さ) property, particularly be preferably 0.5～3mm.By making protuberance height T more than or equal to 0.3mm, just can reduce the contact area with skin, and the generation itch (system レ) that causes owing to skin is blocked can prevent to use the time and macula (カ Block レ) etc.And by making protuberance height T below 5mm, the distance that just can make absorbed liquid arrive the 2nd layer 102 diminishes, even also can carry out the absorption of liquid smoothly when hanging down load.
Here, the height of protuberance 104 is tested in the following manner.
At first, cutting out in length and breadth from surficial sheets, length is the test film of 30mm * 30mm.And, with vertically (constitute the fiber alignment direction (flow direction when aggregate of fibers is made) of the 1st layer aggregate of fibers) almost parallel and line by junction surface 3 on make section.(Olympus system SZH10) obtains the enlarged photograph in this cross section with high power lens (Ha イ ス コ one プ).
According to the engineer's scale of enlarged photograph, measure from the top of protuberance 104 to the bottom height at (adjacent junction surface 103 above).
The 2nd layer of 102 aggregate of fibers by thermal contraction constitutes, and shown in Fig. 5 and Fig. 6 (a), the perforate 105 that runs through the 2nd layer is formed regularly with predetermined pattern.Perforate 105 is, by the 2nd layer thermal contraction, the slit 105 ' (with reference to Fig. 6 (b)) of the 2nd layer of incision before thermal contraction is expanded open to form, the shape of each perforate 105 with the butt joint of two circular arcs form, elongate shape.Perforate 105 integral body are configured with staggered pattern.The shape of perforate 105 also can be ellipse, circle, Pear-Shaped, egg type etc.And perforate 105 also can be by configuration is a plurality of side by side respectively on MD and CD two directions.And perforate 105 preferably spreads all over ground, whole surficial sheets zone and evenly disperses.
Except slit is formed: by the 1st layer with the pattern at the 2nd layer the integrated position of lamination will around the situation of the pattern that surround or the integrated pattern identical with the staggered pattern of slit, at integrated pattern of the lamination of layers 1 and 2 and slit pattern is under the situation of combination arbitrarily, because integrated fixing position can increase and decrease the shortening or the contraction scope of slit length, therefore hole shape can be according to the difference at each position, and forms at random hole shape and perforated area.
The average perforated area of each perforate 105 from the viewpoint that high viscosity liquid passes through, should be 3～320mm
2, particularly be preferably 7～120mm
2And, the 2nd layer percent opening (will with the unit are (100cm of surficial sheets
2) ratio of the total perforated area of contained perforate 105 in corresponding, this unit are, the value of representing with percentage), from the viewpoint that high viscosity liquid passes through, should be 5～70%, particularly 7～50% is good.
Above-mentioned average perforated area and above-mentioned percent opening are measured by following manner.
(assay method of average perforated area and percent opening)
Use light source (サ Application ラ イ ト SL-230K2; LPL Co., Ltd. system), support (コ ピ one ス Application De CS-5; LPL Co., Ltd. system), lens (24mm/F2.8D Nikon lens), CCD camera are (by (HV-37; Hitachi Denshi Ltd.'s system) F-MOUNT is connected with camera lens) and capure card (ス ペ Network ト ラ 3200; カ ノ one プ ス Co., Ltd. system), obtain the image that surficial sheets 1 has the perforate side.The image that obtained is used the image analysis software (edition 4 .20) of NEXUS corporate system, binary conversion treatment is partly carried out in its perforate.From trying to achieve the perforated area of each perforate, and get the average of these and obtain average perforated area through the image after the binary conversion treatment.Then, the summation that makes the perforate part area that passes through binary conversion treatment just can be tried to achieve percent opening (%) divided by total image area., can on image, split bore portion and be coated with first-class auxiliary processing comprehensively relatively under the situation of difficult in the mensuration of the perforated area of each perforate.
Below, with reference to Fig. 8 (a), the preferable manufacture method of the surficial sheets 110A of the 1st embodiment is described.
In this manufacture method, as the 2nd layer 102, use the aggregate of fibers of heat-shrinkable, and as the 1st layer 101, use be to begin below the temperature in the contraction that constitutes the 2nd layer aggregate of fibers, can not carry out the aggregate of fibers of thermal contraction.
At first, will constitute by the aggregate of fibers of heat-shrinkable the 2nd layer 102, pull out and transport continuously from raw material roller 120, form a plurality of slits 105 ' (with reference to Fig. 6 (b)) by rotary cutter 6 with predetermined pattern to the 2nd layer 102.Rotary cutter 6 possesses: cutting roller 61, and it has a plurality of blades that along the circumferential direction form; And accept roller 62, and itself and above-mentioned cutting roller are oppositely arranged, and the direction of each slit 105 ' parallels with the 2nd layer flow direction (operating direction, MD direction).
The length of the longitudinally of each slit is (in the present embodiment, be the length of the MD direction of surficial sheets) be that 5～50mm is preferable, this is from the viewpoint of transverse strength and perforated area, in addition, the Breadth Maximum of slit (with the width of longitudinally vertical direction) is preferably 1～20mm, and this is by with the viewpoint of intensity from high viscosity liquid.
Then, will cut the 2nd layer 102 of slit 105 ', with the 1st layer 101 carry out lamination, by heat embossing roller arrangement 7 it is partly engaged with predetermined pattern two-layer 101,102 after the lamination.Heat embossing roller arrangement 7 is between concavo-convex roller 71 that is formed with predetermined pattern on the side face and flat roll 72 or at concavo-convex roller each other, with two-layer partly heating and pressurizing, thereby makes two-layer integrated at thickness direction.
And, with lamination integrated the 1st and the 2nd layer lamination sheet material 110 ', import pin tentering heater 8 continuously.In pin tentering heater 8, by the pin that interlock moves along with flowing of lamination sheet material 110 ', the both sides of this lamination sheet material 110 ' are fixed, the shrinkage degree of the 2nd layer of 102 width is controlled at the state that can not be retracted to below the preset width, simultaneously lamination sheet material 110 ' is heat-treated, so that its contraction that reaches the aggregate of fibers that constitutes the 2nd layer 102 begins the above temperature of temperature.Heat-treating methods can use: make hot blast see through the method for lamination sheet material, send the method, warm-up mill method, far infrared processing etc. of hot blast from the 2nd layer of one side-blown.
By this heat treatment, when the 2nd layer 102 was shunk, each slit 105 ' expands to be opened and forms perforate 105.And along with the 2nd layer 102 contraction, the height that the part beyond the 1st layer 101 the junction surface is deformed into overshooting shape or forms the part of overshooting shape becomes higher, and simultaneously, the fibre density of this part descends.
Like this, just can obtain the surficial sheets 110A that the absorbent commodity of the 1st embodiment is used.
In above-mentioned heat treatment, owing to be, apply at its flow direction and heat-treat under the state of tension force continuous lamination sheet material 110 ' in transit, therefore can under the state that width and longitudinally shrink, heat-treat the 2nd layer 102 of control.
Like this, by control the 2nd course width with and/or the state of the contraction of longitudinally under, preferably control under the state of contraction of the 2nd course width and lengthwise two directions and heat-treat, just can produce the perforate that forms by thermal contraction thus, and the control of the perforated area of gained is also become easy.
Here, the state that so-called control the 2nd course width and/or longitudinally shrink, shrink locally though be meant the aggregate of fibers that allow to constitute the 2nd layer, will fully suppress as the contraction of the width of the 2nd layer of integral body and length or be suppressed at below the estimated rate.This state is not limited only to make the 2nd layer width (with mobile length of putting to vertical direction) and the complete constant situation of length (with the length of flow direction equidirectional) before and after heat treatment, comprises that also its width and/or length have the situation of dwindling to a certain degree.But from the viewpoint of management that the scope that obtains clear and definite perforate and weight per unit area are increased, the percentage reduction of area before and after the 2nd layer of contraction is 0～60%, particularly is preferably 5～50%.The 2nd layer percentage reduction of area can be by following formula (1), from perisystolic benchmark area S
0, and the contraction of benchmark area after area S
1Try to achieve.
Shrinkage factor (%)=(S
0-S
1)/S
0* 100 (1)
If the surficial sheets 110A that the absorbent commodity of the 1st embodiment is used, because the 1st layer heaved into overshooting shape, expansion between the fiber and density is reduced, and the 2nd layer have owing to thermal contraction forms highdensity zone and opening area.Because the 1st layer of fibre density with the 2nd layer is different, therefore under the situation of hydrophilic fibers, will produce difference on the state soaking into of liquid owing to capillarity.Because the 1st layer is low-density (dredging), so high viscosity liquid passes through easily.Be used to sufficient perforate that high viscosity liquid is passed through owing to have, so high viscosity liquid can successfully flow to absorber by perforate at the 2nd layer.And, the 1st layer residual low-viscosity liquid, utilize capillarity poor of layers 1 and 2, transfer to the 2nd layer from the 1st layer.Therefore, high viscosity liquid is successfully seen through, and do not have liquid residue, thereby be difficult for hectic fever and obtain the sensation of drying (dry and comfortable) on the surface.
And, if the manufacture method of above-mentioned surficial sheets, owing to make fiber thermal contraction around the slit, but the therefore sheet material of high-speed production with large volume (high volume) than large opening.
If the fiber that constitutes the 1st layer and the 2nd layer will be described,, preferably use the hot-melt-bondable fiber, particularly be fit to use the fiber that constitutes by thermoplastic, polymeric materials then as the fiber that constitutes the 1st layer.As thermoplastic, polymeric materials, can exemplify out polyester such as polyolefin such as polyethylene or polypropylene, polyethylene terephthalate, polyamide etc.And can use the core-sheath-type composite fibre or the parallel composite fiber that constitute by these thermoplastic, polymeric materials.
As the form that constitutes the 1st layer aggregate of fibers, can be for example by combing method (the カ one De method) fiber web that forms, the nonwoven fabric that forms by the heat fusing Method for bonding, by water acupuncture manipulation (current Jiao Network method) nonwoven fabric that forms, the nonwoven fabric that forms by needle point method, the nonwoven fabric that forms by solvent bonding, the nonwoven fabric that forms by spun-bond process, the nonwoven fabric that forms by meltblown or knitted fabric etc.
The 1st layer 101 of the 1st embodiment also can be made of the fiber web that combing method forms.The 1st layer of 101 fiber web that is formed by combing method as if use constitutes, and then compares with nonwoven fabric, and therefore distortion or distortion that more difficult generation causes because of thermal contraction obtain integrated pattern of cooperation and uniform shape for lugs easily.
By the fiber web that combing method forms, be by the aggregate of fibers under the state before the nonwoven fabricization.That is to say, be under the state of the subsequent treatment that on not being implemented in web used when making nonwoven fabric, applied, for example be under the state of the heating and melting adhesion process of carrying out not implementing to utilize venting method or calendering method, the fiber aggregate of fibers under the state that is intertwined of loosely extremely each other.
To be used under the 1st fibrolaminar situation by the fiber web that combing method forms, when making the 1st layer 101 and the 2nd layers 102 to engage or after engaging, bonding or solvent carries out bonding or mechanically interweaves by heat fusing together with the fiber in the 1st layer 101.
As constituting the 2nd fibrolaminar fiber, preferably use the heat-shrinkable fiber, particularly constitute and have the material of heat-shrinkable by thermoplastic, polymeric materials.From after thermal contraction, also maintaining retractility and, preferably using the tendentiousness fiber that curls as the soft this point of surficial sheets.
The tendentiousness fiber that curls is the fiber with following such retractable property,, before being heated, can carry out the same processing of fiber used with nonwoven fabric in the past that is, and, by heating, can present spiral helicine rolling up (curling) with predetermined temperature.
The tendentiousness fiber that curls is by being that the eccentric core-sheath-type composite fibre or the parallel composite fiber of composition constitutes with two kinds of thermoplastic, polymeric materials of different shrinkage factors for example.For example, the spy opens the content that flat 9-296325 communique and No. 2759331 communique specifications of Japan Patent are put down in writing.
As the form that constitutes the 2nd fibrolaminar aggregate of fibers, can be that (1) is contained and curled the tendentiousness fiber and pass through fiber web that combing method forms or nonwoven fabric that (2) have heat-shrinkable, as this nonwoven fabric can exemplify the nonwoven fabric that forms by warm-up mill, the nonwoven fabric that forms by the heat fusing Method for bonding, the nonwoven fabric that forms by the water acupuncture manipulation, the nonwoven fabric that forms by needle point method, the nonwoven fabric that forms by solvent bonding.The nonwoven fabric that forms by spun-bond process, the nonwoven fabric that forms by meltblown etc.Here, so-called nonwoven fabric with heat-shrinkable is meant the nonwoven fabric that has by the character of shrinking with the heating under the predetermined temperature.The 2nd layer 102 of the 1st embodiment is to be formed by the heat-shrinkable nonwoven fabric that the heat-shrinkable fiber is constituted.
On the 1st layer 101 and the 2nd layers 102, also can sneak into above-mentioned fiber in addition, for example the hygroscopicity fibre of artificial silk (rayon), cotton, hydrophilic acrylic acid fibrid etc.
The following describes the surficial sheets 110B that uses as the absorbent commodity of the 2nd embodiment.
For the surficial sheets 110B of the 2nd embodiment, the difference of the surficial sheets 110A of main explanation and the 1st embodiment will be omitted the explanation of same structure.Particularly, identical for not adding the explanation part with the 1st embodiment, can suitably use the above-mentioned explanation relevant with the 1st embodiment.
Among the surficial sheets 110B the 1st layer 101 and the 2nd layers 102 are formed by nonwoven fabric arbitrarily.The 1st layer of 101 and the 2nd layers of 102 pattern that engages are the pattern shown in Fig. 7 (b).
In the 2nd embodiment, as shown in Figure 9, on the 1st layer of 101 part that becomes shape for lugs (part beyond the 1st layer 101 the junction surface) 104, incision slit 105B.Slit 105B is formed overshooting shape by the 1st layer 101, and slit expands to be opened, and it is poor just can to form ladder on the sheet material about slit, thus the formation perforate.
The surficial sheets 110B of the 2nd embodiment makes by the method shown in Fig. 8 (b).
That is to say, will begin as the thermal contraction of the 2nd layer 102 aggregate of fibers below the temperature not can thermal contraction aggregate of fibers constituted the 1st layer 101, pull out and transport from the raw material roller, by 6 pairs the 1st layer 101 incision of rotary cutter slit.Then, will on the 1st layer, carry out lamination, and make two-layer 101,102 partly to engage, thereby make it form an integral body at thickness direction by heat embossing roller arrangement 7 by the 2nd layer 102 that heat-shrinkable aggregate of fibers (nonwoven fabric) constitutes.Long-pendingly layer by layer be holistic lamination sheet material 110 ' with the 1st and the 2nd, import to pin tentering heater 8, begin temperature more than the temperature, heat-treat, so that the 2nd layer of 102 thermal contraction with the contraction that constitutes the 2nd layer 102 aggregate of fibers.
By this heat treatment, when the 2nd layer 102 is shunk, make the 1st layer 101 junction surface 103 part in addition be deformed into overshooting shape, simultaneously, make the slit bending of this jut and form arch, because the height of arch is different with curvature, slit just expands to be opened, and in that to produce ladder about slit on arch poor, thereby form perforate.
Like this, just can obtain the surficial sheets 110B that the absorbent commodity of the 2nd embodiment is used.The formation of slit, the 1st and the 2nd layer joint and heat treated condition etc. can similarly be carried out with the method shown in above-mentioned Fig. 8 (a).
If the surficial sheets 110B that the absorbent commodity of the 2nd embodiment is used, because because of the ladder difference between arch produces the gap, therefore, high viscosity liquid just can waltz through the 1st layer from above-mentioned gap, high viscosity liquid is difficult to residual from the teeth outwards thus.
And, if the manufacture method of the surficial sheets shown in above-mentioned Fig. 8 (b) just can be produced the surficial sheets of the good large volume of high viscosity liquid permeability fast.
Below, the surficial sheets of using as the absorbent commodity of the 3rd embodiment is described.
As the surficial sheets of the 3rd embodiment, the difference of surficial sheets 1 10A of main explanation and the 1st embodiment, and will omit its explanation to identical structure.Particularly, identical for not adding the explanation part with the 1st embodiment, can suitably use the above-mentioned explanation relevant with the 1st embodiment.
The surficial sheets 110C of the 3rd embodiment has perforate, and this perforate makes the slit that runs through the 1st and the 2nd layer expand to open and produces.
The surficial sheets of the 3rd embodiment is made by method shown in Fig. 8 (c).
That is to say, to constitute by the heat-shrinkable aggregate of fibers the 2nd layer 102, with begin in the thermal contraction that constitutes the 2nd layer aggregate of fibers below the temperature not can thermal contraction aggregate of fibers constituted the 1st layer 101, carry out lamination, make two-layer 101,102 by heat embossing roller arrangement 7, engage with predetermined pattern part ground.And, long-pendingly layer by layer be holistic lamination sheet material 110 ' to making the 1st and the 2nd, carry out the heat treatment that forms and implement by pin tentering heater 8 of the slit implemented by rotary cutter 6 successively.
By this heat treatment, when the 2nd layer 102 was shunk, the 1st layer 101 that engages with the 2nd layer 102 was also shunk, and the slit expansion is opened and formed perforate on two parts of the 1st and the 2nd layer.And along with the 2nd layer 102 contraction, the height that the part beyond the 1st layer 101 the junction surface is deformed into overshooting shape or forms the part of overshooting shape becomes higher, and simultaneously, the thickness of this part increases.
Like this, just can obtain the surficial sheets 110C that the absorbent commodity of the 3rd embodiment is used.The formation of slit, the 1st and the 2nd layer joint and heat treated condition etc. except formation runs through the 1st and the 2nd layer slit, can be used with method identical shown in above-mentioned Fig. 8 (a) and carry out.
If the surficial sheets 110C that the absorbent commodity of the 3rd embodiment is used, owing to be to be formed with to run through the 1st and the 2nd layer slit and carry out perforate, therefore can obtain the bigger surficial sheets of perforated area, it also can improve the suction velocity and the soakage of high viscosity liquid, and has the good permeability to absorber.
And, if the manufacture method of the surficial sheets shown in Fig. 8 (c) runs through two-layer slit owing to form, therefore form slit easily, but and high-speed production.
And, in the method shown in Fig. 8 (c), though be after making the 1st layer and the 2nd layer to engage, the formation slit, but also can be with opposite order, promptly, on the 1st after the lamination and the 2nd layer, form after the slit, again both are partly engaged and make it form an integral body.Even also can obtain same action effect in this case.
The absorbent commodity surficial sheets and the manufacture method thereof used of the 3rd invention have more than and are limited to each above-mentioned embodiment.
For example, slit has more than the slit that is limited to the locality that the respective embodiments described above are such, predetermined pattern is such, also can be continuous slit.And the direction of slit has more than and is limited to the MD direction, and CD direction or oblique slit are also passable.
Under situation about slit being arranged on the 1st layer and the 2nd layer two-layer, also can on each layer, form respectively after the slit, engage and form an integral body (slit of the same position that is not connected also can).
And, also can be for example, constitute the 1st layer of the 1st embodiment by nonwoven fabric, constitute the 1st layer of the 2nd embodiment by the fiber web that forms by combing method.
As absorbent commodity of the present invention, can be sanitary napkin, disposal type diaper, incontinence pad, pull-on pant lining (パ Application テ イ ラ イ Na one) etc.And as other component parts of absorbent commodity, for example absorber or back-sheet can be used to be used for sanitary napkin, and the parts of the absorbent commodity of disposal type diaper etc. with being not particularly limited in the past.For example, can be to form by the paper of water permeability, cover sheets that nonwoven fabric constitutes by on aggregate of fibers or aggregate of fibers and high water absorbency polymer, covering as absorber.
Explanation clipped in the above-mentioned embodiment and the necessary condition that had of an embodiment just also can suitably be applied to other embodiment respectively, and the necessary condition of each embodiment also can be in embodiment suitably displacements each other.
The the 1st and the 2nd inventive embodiment
1) manufacturing of no perforate nonwoven fabric
The web of the potential helical form of Daiwa Textile Co., Ltd.'s manufacturing being rolled up (curling) property fiber (CPP fiber (trade name), 2.2dtex * 51mm) 100% undertaken nonwoven fabricization by warm-up mill.The processing conditions of warm-up mill is, 140 degrees centigrade of knurling rolls, 130 degrees centigrade of flat-rolls, embossing rate 28% (point), speed 80m/ minute.
2) formation of slit
On the wide zone of the 200mm of the width central authorities of the no perforate nonwoven fabric of gained, forming multiple row length (length of flow direction (MD direction)) is the slit of 9mm, make it be parallel to the MD direction respectively, and make on MD direction adjacent slots each other be spaced apart 3mm.The slit of adjacent column interval (interval of CD direction) each other is 5mm, and the slit of adjacent column position relation mutually different (interconnected) each other.
3) perforate processing (manufacturing of perforate sheet material)
From the zone that the slit of the nonwoven fabric that is formed with slit is formed, obtain the test film of MD direction 1000mm, CD direction 210mm, the width that stays the width central authorities of this test film is the part of 120mm, presses the foundary weight (heavy り) of wide 35mm, long 1000mm in the two side portions of this test film.Like this, the width that just can the limit assay sheet and the contraction of longitudinally, thus the test film under such state is heat-treated (heating condition: 142 degrees centigrade, wind speed 2m/ second, 25 seconds heat time heating times (speed 4.5m/ branch)) by ventilation heat treated machine.
The wide zone of 201mm in the width central authorities of the no perforate nonwoven fabric that obtains similarly to Example 1, form the slit of the long 18mm of multiple row, and make its slit adjacent on the MD direction each other be spaced apart 6mm, and except the slit interval (interval of CD direction) each other of adjacent column be the 3mm, obtain the perforate sheet material similarly to Example 1.
Comparative example
On the wide zone of the 162mm of the width central authorities of the no perforate nonwoven fabric that obtains similarly to Example 1, make the circular hole of diameter 18mm, on MD direction and CD direction ground both direction, form row, obtain the perforate sheet material thus.The formation of circular hole is undertaken by punching processing (stamping-out processing), and circular hole interval each other all is 6mm in MD direction and CD direction.
The perforate sheet material of embodiment and comparative example is carried out the measurement of weight per unit area etc., and with its result integrating representation in table 1.No perforate nonwoven fabric in the table 1 is exactly the no perforate nonwoven fabric before slit among the embodiment 1 forms.
(measuring method of maximum point load and maximum point degree of stretching)
The Compression and Expansion testing machine " RTM-100 (trade name) " that uses (strain) Japan ボ one Le De ウ イ Application to make is measured with stretch mode.At first, it is the size of 100mm * 50mm that sheet material is cut into when being 150mm * 50mm, CD orientation measurement sheet when the MD orientation measurement sheet, and with it as the measurement sheet that is adopted.Make and measure sheet between the air chuck (エ ア one チ エ Star Network) that is installed on the Compression and Expansion testing machine, initial sample long (distance between chuck) is set to MD orientation measurement sheet 100mm, CD orientation measurement sheet 50mm, make load measuring gauge (load cell) (the specified 5kg of being output as) go up of the speed rising of the chuck of installation, stretch thus and measure sheet with the 300mm/ branch at the Compression and Expansion testing machine.By this measurement, can measure maximum point load, and the degree of stretching during with maximum point load is as the maximum point retractility.In addition, so-called MD orientation measurement sheet is exactly the draw direction and the identical measurement sheet of MD direction of measuring sheet of Compression and Expansion testing machine; And CD orientation measurement sheet is exactly the draw direction and the identical measurement sheet of CD direction of measuring sheet of Compression and Expansion testing machine.
(measuring method of thickness)
Use the laser extensometer of キ one エ Application ス (strain) company to measure.
Increased pressure board is placed on the price fixing, does not place test film (nonwoven fabric) therebetween, at this moment thickness is shown as 0.000mm.Then, on price fixing, place test film, and place increased pressure board in the above, under the state of the numerical stability after about 5 seconds, read thickness.With the thickness of 5 test film average thickness value as sample.
Above-mentioned increased pressure board is the plectane of the diameter 56mm of aluminum, and the thickness of each sample is at 0.5gf/cm
2Thickness under the pressurized state (49Pa).And, the 3rd of the decimal of thickness rounded up and calculate the 2nd of decimal.Other conditions etc. are following described.
Sensor head: LK-080, amplifier module: LK-2100, image simulation controller: RJ-800, measurement sheet: 100mm * 150mm
Table 1
As shown in table 1, the perforate sheet material of embodiment, not only perforated area (aperture) and percent opening are very big, and weight per unit area is low, high strength.In addition, the outward appearance of the perforate sheet material of embodiment during with perusal, can be found that its surface almost is not have concavo-convex smooth surface.
Industrial utilizability
If perforate sheet material of the present invention just can provide perforated area (aperture) and the percent opening utmost point Greatly, the low and high-intensity sky sheet material of opening of weight per unit area.
If the manufacture method of perforate sheet material of the present invention, just can provide can be economical and efficiently Manufacturing has the perforate sheet material of above-mentioned characteristic, and can get rid of the system of perforate sheet material of the waste of material Making method.
The surficial sheets that absorbent commodity of the present invention is used, can make from the teeth outwards liquid of drainage, Particularly the liquid of high viscosity is very difficult from the teeth outwards residual, therefore is difficult for producing eczema or macula Deng.
If the manufacture method of the surficial sheets that absorbent commodity of the present invention is used just can be efficient And make economically the above-mentioned surficial sheets with good characteristic.
Claims (3)
1. the perforate sheet material is characterized in that, the part beyond the slit of the heat-shrinkable nonwoven fabric with a plurality of slits is shunk under the state that the contraction of the width of this heat-shrinkable nonwoven fabric and length is restricted, and opens so that above-mentioned each slit expands; On this heat-shrinkable nonwoven fabric, though be formed with a plurality of under the state that does not apply tension force, the perforate also kept of perforate state;
The average perforated area of above-mentioned perforate is 10～350mm
2
Above-mentioned perforate connects the perforate sheet material at thickness direction.
2. the manufacture method of the described perforate sheet material of claim 1, it is characterized in that, have on the heat-shrinkable nonwoven fabric of a plurality of slits, under the state of the contraction of width that limits this heat-shrinkable nonwoven fabric and length, by implementing heat treatment, above-mentioned each slit is expanded open, thereby make perforate sheet material with a plurality of perforates.
3. the surficial sheets used of absorbent commodity is characterized in that, be located at the 1st layer of skin one side, with the 2nd layer that is located at absorber one side carry out lamination, and with two-layer locality combination, to form the junction surface of predetermined pattern; Part beyond the 1st layer the above-mentioned junction surface becomes overshooting shape; Under the state that the contraction that is formed with on the 2nd layer in width and length is restricted, shrink so that slit expands the perforate of opening and generating; And described perforate does not connect the 1st layer; Above-mentioned the 2nd layer of aggregate of fibers by heat-shrinkable constitutes, and by the 2nd layer heat-shrinkable, and the part of the 1st layer above-mentioned overshooting shape formed.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002043892A JP3850310B2 (en) | 2002-02-20 | 2002-02-20 | Method for manufacturing perforated sheet |
| JP43892/2002 | 2002-02-20 | ||
| JP2002082174A JP3886400B2 (en) | 2002-03-22 | 2002-03-22 | Top sheet for absorbent articles |
| JP82174/2002 | 2002-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1620533A CN1620533A (en) | 2005-05-25 |
| CN100436689C true CN100436689C (en) | 2008-11-26 |
Family
ID=27759657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028282167A Expired - Fee Related CN100436689C (en) | 2002-02-20 | 2002-12-27 | Perforated sheet and method of manufacturing the sheet |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN100436689C (en) |
| AU (1) | AU2002359935A1 (en) |
| TW (1) | TWI235651B (en) |
| WO (1) | WO2003071019A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5346177B2 (en) * | 2008-06-03 | 2013-11-20 | ユニ・チャーム株式会社 | Pants-shaped wearing article and manufacturing method thereof |
| JP5469902B2 (en) * | 2009-04-03 | 2014-04-16 | ユニ・チャーム株式会社 | Sheet manufacturing method, material manufacturing method for absorbent article, and sheet manufacturing apparatus |
| CN102991004A (en) * | 2012-12-11 | 2013-03-27 | 四川大学 | Ribbed cloth and manufacturing method |
| US9861533B2 (en) | 2013-05-08 | 2018-01-09 | The Procter & Gamble Company | Apertured nonwoven materials and methods for forming the same |
| WO2016073713A1 (en) | 2014-11-06 | 2016-05-12 | The Procter & Gamble Company | Crimped fiber spunbond nonwoven webs / laminates |
| WO2016073686A1 (en) | 2014-11-06 | 2016-05-12 | The Procter & Gamble Company | Zonal patterned apertured webs, laminates, and methods for making the same |
| WO2016073694A1 (en) | 2014-11-06 | 2016-05-12 | The Procter & Gamble Company | Absorbent article with color effects |
| CN106319763B (en) * | 2016-08-25 | 2019-01-08 | 厦门延江新材料股份有限公司 | A kind of apertured nonwoven cloth and preparation method thereof |
| WO2018152272A1 (en) | 2017-02-16 | 2018-08-23 | The Procter & Gamble Company | Absorbent articles with substrates having repeating patterns of apertures comprising a plurality of repeat units |
| CN107595486A (en) * | 2017-09-24 | 2018-01-19 | 清远市腾科机械设备有限公司 | The multicomponent top flat of absorbent article and the absorbent article for including the multicomponent top flat |
| CN113301871A (en) * | 2019-01-15 | 2021-08-24 | 花王株式会社 | Warming appliance |
| EP3958809A1 (en) | 2019-04-24 | 2022-03-02 | The Procter & Gamble Company | Highly extensible nonwoven webs and absorbent articles having such webs |
| CN110106628B (en) * | 2019-05-10 | 2020-09-25 | 中原工学院 | High-fluffiness moisture-absorbing breathable fiber net and punching and fuzzification method thereof |
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- 2002-12-27 AU AU2002359935A patent/AU2002359935A1/en not_active Abandoned
- 2002-12-27 CN CNB028282167A patent/CN100436689C/en not_active Expired - Fee Related
- 2002-12-27 WO PCT/JP2002/013786 patent/WO2003071019A1/en active Application Filing
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| JPH09111631A (en) * | 1995-10-19 | 1997-04-28 | Daiwabo Co Ltd | Nonwoven fabric having many wrinkles and its production |
| JPH11253490A (en) * | 1998-03-16 | 1999-09-21 | Oji Paper Co Ltd | Disposable diaper |
| JPH11293553A (en) * | 1998-04-07 | 1999-10-26 | Daiwabo Co Ltd | Opened nonwoven fabric and its production |
| WO2000038912A1 (en) * | 1998-12-23 | 2000-07-06 | Kimberly-Clark Worldwide, Inc. | Liquid transfer material of a transversely extensible and retractable necked laminate of non-elastic sheet layers |
| EP1054092A1 (en) * | 1999-05-17 | 2000-11-22 | Nippon Petrochemicals Company, Limited | Composite sheet having elasticity, elastic web made from thermoplastic elastomer, and method and apparatus of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI235651B (en) | 2005-07-11 |
| CN1620533A (en) | 2005-05-25 |
| WO2003071019A1 (en) | 2003-08-28 |
| AU2002359935A1 (en) | 2003-09-09 |
| TW200303188A (en) | 2003-09-01 |
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