CN101019794A - Absorbent article having stain resistant properties - Google Patents
Absorbent article having stain resistant properties Download PDFInfo
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- CN101019794A CN101019794A CN 200710084039 CN200710084039A CN101019794A CN 101019794 A CN101019794 A CN 101019794A CN 200710084039 CN200710084039 CN 200710084039 CN 200710084039 A CN200710084039 A CN 200710084039A CN 101019794 A CN101019794 A CN 101019794A
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- sanitary towel
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Abstract
The present invention provides a sanitary napkin including a body facing surface, a portion adapted to be arranged over the vaginal opening during use, a first colored portion, said colored portion extending over at least the portion of the napkin to be placed over the vaginal opening during use, a noncolored portion, wherein said first colored portion has a first color as measured from said body facing surface prior to staining, wherein the first colored portion has a second color as measured from said body facing surface after staining, wherein the first color has an average L value greater than 80; and wherein delta-a<*> between said first color and said second color is less than 18.
Description
The cross reference of related application
The application requires the priority of the 60/772nd, No. 684 application of submission on February 13rd, 2006, and the full content of this application is included this paper by reference in.
Invention field
The present invention relates generally to absorbent article such as sanltary towel.More specifically, the present invention relates to have the sanitary towel of improved stain resistant properties.
Background of invention
The sanitary towel that is used for absorbing through liquid is well known in the art.At present the most of sanitary towels that use comprise the impermeable barrier layer of cover layer, liquid of fluid permeable and be arranged in cover layer and barrier layer between absorption system.Described absorption system can comprise single layer of absorbent material or can comprise multilamellar.
The shortcoming of the prior art goods of the above-mentioned type is, in case be absorbed in the goods just and can see redness through liquid from this product surface through liquid.See from this product surface and to be thought ugly and unwanted by user through the redness of liquid.
It is to make to see through the visuality of liquid minimum from product surface after liquid is absorbed into goods that " the sheltering " of having made in the prior art in view of the above problems, attempted through the dyeing that liquid causes.Disclosed in the prior art and variously be fit to shelter, promptly be used for preventing through the descried goods configuration of liquid through liquid.
Although the goods of some prior aries can effectively be sheltered through liquid, have been found that these goods have some shortcoming.。For example, disclosed many prior art goods that are fit to shelter through liquid adopt dark-coloured layer to hide through liquid in the prior art, make not in sight.Yet this dark-coloured layer also can be seen and do not discovered with needing from sanitary towel's end face, and is unhygienic or unclean because dead color means sanitary towel.
Dislike seeing through liquid that they do not wish to can't see fully or shelter through liquid yet from sanitary towel's end face although also have been found that user.Especially, we find that user wishes to see through liquid from sanitary towel's end face, because make relieved their menstruation of user be in health status through the existence of liquid.
Therefore, an object of the present invention is to provide and a kind ofly can see the red minimized sanitary towel that sanitary towel's end face is occurred from sanitary towel's end face through liquid.In addition, another object of the present invention provide a kind of have these characteristics but before use the surface from sanitary towel towards health can't see dark-coloured sanitary towel.
Summary of the invention
In view of from above-mentioned purpose, the invention provides a kind of sanitary towel that comprises: towards the surface of health with the lower part; In use be fit to be arranged in the part on the vaginal opening; First coloured moiety, described coloured moiety extends beyond at least a portion and will be placed on sanitary towel on the vaginal opening during use; Colourless part; Wherein said first coloured moiety has first color that the surface towards health records from described before the dyeing, wherein said first coloured moiety has dyeing back second color that the surface towards health records from described, and the average L-value of wherein said first color is greater than 80; And the Δ a between wherein said first color and described second color
*Less than 18.
The accompanying drawing summary
Fig. 1 a is the sketch map that is used for the three-dimension film of absorbent article of the present invention;
Fig. 1 b is that the part of thin film shown in Fig. 1 a of obtaining of the line 1B along Fig. 1 a cuts off perspective view;
Fig. 1 c is the amplification microphotograph of three-dimension film shown in Fig. 1 a, has shown its end face;
Fig. 1 d is the amplification microphotograph of three-dimension film shown in Fig. 1 c, has shown its bottom surface;
Fig. 1 e is the sketch map that is used for the three-dimension film of absorbent article of the present invention as described in second embodiment;
Fig. 1 f is that the part of thin film shown in Fig. 1 e that obtains along the line of Fig. 1 e " 1f " cuts off perspective view;
Fig. 1 g is the microphotograph of three-dimension film end face shown in Fig. 1 e;
Fig. 1 h is the microphotograph of three-dimension film bottom surface shown in Fig. 1 g;
Fig. 1 i is the amplification microphotograph of a three-dimension film part shown in Fig. 1 g, and described part is corresponding to the film portion that is centered on by the ring among Fig. 1 e " 1f ";
Fig. 1 j is the microphotograph of the part of three-dimension film shown in Fig. 1 i, has shown its bottom surface;
Fig. 2 is the sketch map that is used to make a kind of three-dimensional profile (topographical) support member of the used thin film of absorbent article of the present invention;
Fig. 3 is used for the sketch map of laser engraving workpiece with the equipment of the three-dimensional profile support member that is formed for making the used thin film of absorbent article of the present invention;
Fig. 4 is the sketch map of the computer control system of equipment shown in Figure 3;
Fig. 5 is the diagram of the file (file) of the laser engraving workpiece three-dimensional profile support member that is used for porous membrane shown in the shop drawings 1a-1d with manufacturing;
Fig. 5 a is the diagram of file shown in Figure 5, has shown its amplifier section;
Fig. 5 b is the diagram of the file of the laser engraving workpiece three-dimensional profile support member that is used for porous membrane shown in the shop drawings 1e-1j with manufacturing;
Fig. 5 c is the illustrated amplifier section of file shown in Fig. 5 b, has shown the file part that is centered on by the ring 5c among Fig. 5 b;
Fig. 5 d is the illustrated amplifier section of file shown in Fig. 5 b, has shown the file part that is centered on by the ring 5d among Fig. 5 b;
Fig. 5 e is the illustrated amplifier section of file shown in Fig. 5 d, has shown the file part that is centered on by the ring 5e among Fig. 5 d;
Fig. 6 is the microphotograph with the workpiece behind the file engraving of Fig. 5;
Fig. 6 a is the microphotograph with the workpiece behind the engraving of file shown in Fig. 5 b-5e;
Fig. 6 b is the amplifier section of workpiece shown in Fig. 6 a, and described amplifier section is corresponding to by the ring 6b region surrounded among Fig. 6 a;
Fig. 7 is placed on the sketch map that being used on the film-forming apparatus made the support member of thin film of the present invention;
Fig. 8 is the sketch map that is used for making the equipment of porous membrane of the present invention;
Fig. 9 is the sketch map around part shown in Figure 8;
Figure 10 utilizes raster scanning boring punching on workpiece to be used to make the diagram of file of the three-dimensional profile support member of porous membrane with manufacturing;
Figure 11 is the top view of absorbent article of the present invention;
Figure 12 is the decomposition diagram of absorbent article shown in Figure 10; With
Figure 13 is the perspective view of an absorbent article part shown in Figure 10, and part has cut off its some layers to show substructure.
Detailed Description Of The Invention
The present invention relates to have the absorbent article of improved stain resistant properties, as sanltary towel.More specifically, sanitary towel of the present invention can make sanitary towel absorb liquid after " redness " outward appearance minimum of liquid makes sanitary towel that the overall appearance of light was arranged before dyeing simultaneously.
Here the color measuring that provides adopts CIE La
*b
*Color system.La
*b
*Color system is also referred to as Hunter color, is that those skilled in the art know.La
*b
*System and eyes are to brightness or luminosity and relevant to the sensitivity of change color.L-value reflected when eyes observe color from dead color become light tone and when ash bleaches to the sensitivity of brightness.The L of the black surface that does not reflect is defined as 0, and the L that the white surface of fluorescence do not take place is defined as 100.Variable a
*The ratio of the reflectance of expression electromagnetic spectrum green area and the reflectance of red area, variable b
*The ratio of the reflectance of expression electromagnetic spectrum blue region and the reflectance of yellow area.
Term " color " generally includes and comprises black and white each value in the interior colour space.Yet for purposes of this application, when describing " coloured moiety " of goods with term " color " or " coloured " in the literary composition, it does not comprise black and white.In the literary composition, black be defined as L＜25 ,-2＜a
*＜2 and-2＜b
*＜2.In the literary composition, be defined as in vain L＞90 ,-2＜a
*＜2 and-2＜b＜2.The replaceable in the text use of term " colourless " and white.
Except as otherwise noted, L, a in " coloured " of the sanitary towel 800 that hereinafter describes in detail zone
*And b
*Value is the value that records with the surface 801 of 3mm aperture from sanitary towel towards health by Minolta CR-321 color measurement system.
With reference to Figure 11, the figure illustrates first embodiment of the present invention, sanitary towel 800 has shown its surface 801 towards health.Sanitary towel 800 generally includes at least one first coloured moiety 802 and at least one colourless part 803.Coloured moiety 802 is arranged in the sanitary towel, thereby at least a portion of described coloured moiety 802 is positioned at the sanitary towel zone that can cover vaginal opening in use.Sanitary towel 800 comprises an imaginary cross central line " a " and an imaginary longitudinal centre line " b ".In the embodiment of sanitary towel 800 shown in Figure 11, coloured moiety 802 extends longitudinally centrage " b " and extends.In addition, coloured moiety 802 is with regard to longitudinal centre line " b " and cross central line " a " symmetry.
The embodiment of the sanitary towel 800 shown in Figure 12-13 comprises cover layer 842, first absorbed layer 846, second absorbed layer 848, nonferrous layer 849 and barrier layer 850.
In one embodiment of the invention, nonferrous layer 849 is goods " intermediate layers ", i.e. layer between cover layer 842 and barrier layer 850.As shown in figure 12, nonferrous layer 849 can be and absorbed layer 846 and 848 isolating independent layers.For example, nonferrous layer 849 can comprise tissue layer that is arranged between cover layer 842 and the transfer layer 846 and so on, and tissue layer has seal coloured moiety thereon in advance.Perhaps, nonferrous layer can comprise first absorbed layer 846 and/or second absorbed layer 848.Perhaps, nonferrous layer can comprise cover layer or inner surface, does not promptly face the barrier layer surface of clothes.Can choose wantonly pigment or dyestuff are applied to selected layer to produce coloured zone, as 802 and 804.The type that is applicable to dyestuff of the present invention and pigment with and applying method be proficient in well-known to those having ordinary skill in the art.
Although above-mentioned coloured moiety 802 and 804 can be the many colors in the chromatograph, find that specific blueness is particularly useful to the present invention.Specifically, L-value between about 60 and 85, a
*Between about-3.0 and-12.0, while b
*Blueness between about-6.5 peace treaties-15.0 is particularly useful to the present invention.These L, a
*And b
*Value is directly to record from the layer that applies color with the 3mm aperture by the MinoltaCR-321 color measurement system.
When the surface measurement from goods towards health, coloured moiety 802 and 804 preferred L-value are about 80-92, a
*Value is being made an appointment with between-6.0 and-3.5 b
*Value is approximately between-5.0 peace treaties-10.0.More preferably, the L-value of described coloured moiety is about 85-92, a
*Value is being made an appointment with between-5.5 peace treaties-4.0 b
*Value is about-7.0 and-9.0.
Each layer in cover layer 842, first absorbed layer 846, second absorbed layer and the barrier layer 850 will be described below in further detail.
Cover layer
With reference now to Fig. 1 a-1d,, these figure have described porous membrane 10 as described in an embodiment of the present invention.Thin film 10 comprises many supports 12 that repeat to interconnect.In the embodiment shown in Fig. 1 a-1d, each support 12 comprises opposing ends zone 12a and 12b and relative sidewall 12c and 12d.Stub area 12a and 12b are spaced from each other separately, and relative sidewall 12c and 12d are spaced from each other separately.In the specific embodiments shown in Fig. 1 a-1d, each support 12 and adjacent stent 12 interconnection.More specifically, as shown in the figure, each support 12 " is shared " shared sidewall 12c, 12d with the support 12 of direct neighbor.Equally, each support 12 is shared shared stub area 12a, 12b with direct neighbor support 12.Porous membrane 10 also comprises first and second Crossware 14a and the 14b.As shown in the figure, Crossware 14b extends to the opposing sidewalls 12d of support 12 from the first side wall 12c.Equally, Crossware 14a extends to relative stub area 12b from stub area 12a.In the embodiment of the present invention shown in Fig. 1 a-1e, show that Crossware 14a and 14b intersect in support central authorities.In addition, in the embodiment of the present invention shown in Fig. 1 a-1e, the mutually orthogonal arrangement of Crossware 14a and 14b.
Although the embodiment of the present invention shown in Fig. 1 a-1d show that porous membrane 10 has two Crossware 14a and 14b, also can only adopt a Crossware,, this Crossware crosses the open area that support 12 limits as long as extending.Equally, although support 12 is shown as hexagon usually, support 12 also can adopt other shape.Crossware 14a and 14b width " a " (seeing Fig. 1 b) separately should be in about 4.0 mils to the scope of about 24.0 mils (1 mil=.001 inch).Crossware 14a and 14b length " b " (seeing Fig. 1 b) separately should be in about 30.0 mils to the scope of about 150.0 mils.Find out that from Fig. 1 a is the easiest thin film 10 can be chosen wantonly and comprise a plurality of knobs 11 that are arranged in film surface or the like.
Again with reference to figure 1b, thin film 10 is usually included in and is generally planar first end face 18 and the planar second relative bottom surface 21 that is generally in imaginary plane 25 in the imaginary plane 23.The end face 38 of sidewall 12c and 12d and the end face of stub area 12a and 12b 40 and plane 23 coplanes.Yet the end face 42 of Crossware 14a and 14b and 44 is with respect to plane 23 depressions.More particularly, the end face 42 and 44 of Crossware 14a and 14b is positioned at the plane 27 that is under plane 23 and 25.Preferably, the end face 42 of Crossware 14a and 14b and 44 end faces 18 depressions with respect to thin film, promptly with respect to plane 23 depressions, cup depth in about 3.0 mils to the scope of about 17.0 mils.The end face 42 of Crossware 14a and 14b and 44 should be basically parallel to imaginary plane 23 and 25.
The inwall 22,24 of sidewall 12c and 12d, the inwall 26,28 of Crossware 14a, the inwall 30,32 of Crossware 14b, and the inwall 34,36 of stub area 12a, 12b limiting hole 16 together, and extend under each comfortable plane 25 of these inwalls, thereby the bottom opening in each hole 16 is positioned under the base plane 21 of thin film, promptly is positioned under the imaginary plane 25.More particularly, the inwall 22,24 of sidewall 12c and 12d, the inwall 26,28 of Crossware 14a, the inwall 30,32 of Crossware 14b, thereby and the inwall 34,36 of stub area 12a, 12b extend downwards and make the bottom opening in each hole be positioned at the imaginary plane 29 that is under imaginary plane 23,25 and 27.Notice that imaginary plane 23,25,27 and 29 is parallel to each other basically.
Because the end face 42,44 of Crossware 14a and 14b is with respect to end face 18 depressions of thin film 10, promptly with respect to imaginary plane 23 depressions, the end face 18 of thin film 10 and the end face of Crossware 42,44 can effectively limit the first relative big hole.Crossware 14a is divided into four relative less holes with the 14b hole that this is bigger, and its bottom opening by each hole 16 is communicated with bigger hole from the end face 42,44 of Crossware 14a and 14b.In other words, in each frame member 12, big relatively hole is limited between plane 23 and the plane 27, and the hole that numerous less relatively and described bigger hole is communicated with is limited between plane 27 and the plane 29.In the embodiment shown in Fig. 1 a-1d, the area that is limited at each the less hole between plane 27 and the plane 29 is less than being limited at 1/4 of the bigger hole gross area between plane 23 and the plane 27.In adopting the embodiment of single Crossware, the area in each the less hole that is limited by Crossware is less than 1/2 of the bigger hole gross area.For the simple of figure and purpose clearly, prompting reader above-mentioned " less " and " bigger " hole all use reference number 16 to represent in the text.
With reference now to Fig. 1 e-1j,, it has been described as the described porous membrane 100 of second embodiment of the present invention.Fig. 1 e-1j adopt with the identical or similar reference number of the used reference number of Fig. 1 a-1d represent with described in Fig. 1 a-1d with above-mentioned identical and/or corresponding structure.
From Fig. 1 e with 1g is the easiest finds out that thin film 100 comprises at least one first 102 and at least one second portion 104.As mentioned above, first 102 is limited by a plurality of supports 12 that repeat to interconnect, and described support defines a plurality of holes 16.In the embodiment shown in Fig. 1 e-1j, each support 12 comprises relative stub area 12a and 12b and relative sidewall 12c and 12d.Porous membrane 100 also comprises first and second Crossware 14a and the 14b.The width of Crossware 14a and 14b " a " should be in about 4.0 mils to the scope of about 24.0 mils.Crossware 14a and 14b length " b " separately should be in about 30.0 mils to the scope of about 150.0 mils.The end face 42 of preferred Crossware 14a and 14b and 44 end faces 18 depressions with respect to thin film, promptly with respect to plane 23 depressions, cup depth in about 3.0 mils to the scope of about 17.0 mils.
With reference to figure 1f, thin film 100 be usually included in the imaginary plane 23 basic for planar upper 18 with imaginary plane 25 in, be the planar second relative bottom surface 21 substantially.Formed sidewall 12c in stub area 12a and 12b and Crossware 14b and sidewall 12c and the 12d intersection region and part 12c ' and the 12d ' of 12d, thereby at least a portion top surface in these zones are with respect to imaginary plane 23 depressions.In the specific embodiments of the thin film shown in Fig. 1 f 100, sidewall 12c in stub area 12a and 12b and Crossware 14b and sidewall 12c and the 12d intersection region and part 12c ' and the 12d ' of 12d have " w " shape or sinusoidal wave form substantially, and cross section defines a pair of paddy (swale) 111 and is arranged in peak 113 between the paddy 111.As shown in the figure, the end face of the thin film 115 in paddy 111 zones is positioned at the plane 35 with respect to imaginary plane 23 depressions.Specifically, plane 35 is between plane 23 and plane 25.Preferred paddy 111 with respect to the degree of depth of plane 23 depression deepest points about 2 to about 5 mils.
Although in particular 100, sidewall 12c in stub area 12a and 12b and Crossware 14b and sidewall 12c and the 12d intersection region and part 12c ' and the 12d ' of 12d basically form " w " shape cross section, but these zones can form other shape and configuration, wherein, Crossware 14a and 14b cave in respect to plane 23 with those regional interior at least a portion top surface that support 12 intersects.By forming thin film 100 in those zones that intersect at Crossware 14a and stub area 12a and 12b and in those zones that Crossware 14b and sidewall 12c and 12d intersect, make at least a portion of thin film cave in, thereby improved the discernable pliability of thin film with respect to plane 23.Although in the specific embodiments of the present invention shown in Fig. 1 f, thin film 100 is part 12c ' and the interior formation of 12d ' of regional endways 12a and 12b and sidewall 12c and 12d, thereby at least a portion film surface has only a thin film with respect to plane 23 depressions with respect to plane 23 depressions but also can construct in these zones.For example, can have only part 12c ' and 12d ' depression or can have only stub area 12a and 12b depression.
Find out that from Fig. 1 e is the easiest the second portion 104 of porous membrane 100a comprises and visually diacritic more than second hole 106, more than first hole 16.Expression in the text " visually can be distinguished " in term, the shape and/or the size in each hole 16 are different fully in the shape in each more than second hole 106 and/or size and more than first hole 16, when by perusal, each more than second hole 106 visually can be distinguished with each more than first hole 16.In the one embodiment of the invention shown in Fig. 1 e-1j, each more than second hole 106 is generally the ellipse of have major axis " y " and minor axis " z ".Major axis " y " and minor axis " z " length separately should be in about 5 mils to the scopes of about 150 mils.In one embodiment, about 43 mils of the length of major axis, about 16 mils of the length of minor axis.In preferred embodiment of the present invention, each 106 space, more than second hole, when from the center in a hole to the center of horizontal adjacent holes when horizontal line is measured, spacing distance " n " is that about 10 mils are to about 100 mils, simultaneously, each more than second hole 106 and vertical adjacent holes 106 spaces, when from the center in a hole to the center of vertical adjacent holes when connecting the diagonal measurement at each center, hole, " o is extremely about 70 mils of about 10 mils to spacing distance.In specific embodiments of the present invention, distance " n " is 40 mils, and distance " o " is 34 mils.
Arrange to form pattern, labelling, literal etc., perhaps their combination in more than second hole 106 necessarily style.For example, in the embodiment of the present invention shown in Fig. 1 e and the 1g, more than second hole 106 is arranged in the butterfly pattern.Although described the butterfly pattern in embodiment of the present invention of reference Fig. 1 e-1j demonstration and description, any other pattern also is possible.
Border 108 should be engaged in more than second hole 106 and visually form pattern, labelling, literal etc.For example, shown in the embodiment of thin film 100, the border cooperates with more than second hole 106 and forms the butterfly pattern.
Although for easy, Fig. 1 e has only shown a butterfly, and many this elements can occur at interval at film surface.For example, in a specific embodiments, thin film can have the many this butterfly that occurs at interval on thin-film material.In addition, the pattern of different sizes be can adopt, for example, in a specific embodiments, a plurality of big relatively butterflies and a plurality of relative little butterflies adopted on the same thin film.
Porous membrane of the present invention should have about 20-30% open area.Open area can be determined by image analysis measurement perforate and not perforate (or plane) zone.In fact, image analysis converts the optical image of optical microscope to be fit to processing the signal of telecommunication.The electron beam image of lining by line scan.Output signal changes with illumination when each row of scanning.White portion produces relative higher voltage and the relatively low voltage of black region generation.Produced the image of porous shaping membrane, in this image, the hole is a white, and the solid section of thermoplastic is various grey levels.
Solid area is fine and close more, and the gray area of generation is dark more.Each row in the image of measuring is divided into sample point or pixel.Adopt following equipment to carry out above-mentioned analysis: by the Quantimet Q520 image analyzer (v.5.02B software and Grey Store Option are housed) of LEICA/Cambridge Instruments Ltd. sale, with the Olympus SZH microscope coupling that has transillumination substrate, plane 1.0 * object lens and 2.50 * eyepiece.Image can be produced by DAGE MTICCD72 video camera.
The representative sample of each material to be analyzed is placed on the microscope desk, be set at 10 * down in the microscope amplification and on video screen, obtain picture rich in detail.Field measurement by representative area is determined open area.The output result of Quantimet program has provided the meansigma methods and the standard deviation of each sample.
The suitable initial thin film of making the three-dimensional porous thin film of the present invention is a kind of thin, successive, unbroken thermoplastic polymeric material's thin film.This thin film is that vapor permeable or steam are impermeable; But its embossing or not embossing; Can on one of its first type surface or two first type surfaces, carry out Corona discharge Treatment, perhaps can be without this Corona discharge Treatment; Can after thin film forms, carry out the surfactant processing to it, perhaps can before thin film forms, surfactant be mixed the thermoplastic polymeric material as batching by surfactant is coated with, sprays or is printed onto on the thin film.Thin film can comprise any thermoplastic polymeric material, comprising but be not limited to: polyolefin, as high density polyethylene (HDPE), linear low density polyethylene (LLDPE), low density polyethylene (LDPE), polypropylene; The copolymer of alkene and vinyl monomer is as the copolymer of ethylene and vinyl acetate or vinyl chloride; Polyamide; Polyester; Polyvinyl alcohol; And the copolymer of alkene and acrylic monomers, as the copolymer of ethylene and ethyl acrylate and ethyl methacrylate (ethylenemethacrylate).Also can use the thin film that contains two or more this polymeric material mixture.According to the test determination that ASTM D-882 number test carried out with the pawl speed (jaw speed) of 50 inch per minute clocks (127 cm per minute) on the Instron testing equipment, vertical (MD) of initial thin film to be bored a hole and horizontal (CD) extend should be at least 100%.The thickness of initial thin film is suitable evenly, and can about 0.5 to about 5 mils or about 0.0005 inch (0.0013cm) to the scope of about 0.005 inch (0.076cm).Can use the thin film of coextrusion, thin film can pass through modification, for example handles with surfactant.Can adopt any known technology, as mould, extrude or initial thin film is made in blowing.
Comprise in the method for boring a hole on the thin film of the present invention thin film is placed on the embossing support surface.When thin film is positioned on the support member, it is applied high fluid pressure difference.The pressure reduction of fluid (can be liquid or gas) makes thin film have the picture on surface of embossing support member.If porose in the embossing support member, then cover film portion on the hole and can be broken up by fluid pressure difference and form porous membrane.The method that forms porous membrane is described in detail among the US 5,827,597 of James etc., and this patent is included this paper by reference in.
This three-dimensional porous thin film preferably is disposed across thermoplastic film on the porous support surface that has with the corresponding pattern of required final film shape and forms.Make it softening with its temperature that raises the thermal air current thin film that leads.Then thin film being applied vacuum makes its shape with support surface consistent.The further elongation of film portion that covers on the support member hole forms the hole on thin film up to breaking.
The suitable porous support member of making these three-dimensional porous thin film is the three-dimensional profile support member of making by the laser engraving workpiece.Laser engraving becomes the illustrating in Fig. 2 of exemplary workpiece of three-dimensional profile support member.
With reference now to Fig. 3,, the figure illustrates the sketch map of the equipment that is used for the laser engraving support member.Start margin tubular workpiece 102 is fixed on the suitable axle or axle 121, and described axle is fixed into workpiece cylindrical and makes its longitudinal axis that centers on bearing 122 rotation.Rotating driver 123 is with controlled velocity live spindle 121.Rotating pulse generator 124 links to each other with axle 121 and monitors the rotation of axle 121, thereby can know its accurate radial position at any time.
Being parallel to and being fixed on outside axle 121 amplitudes of oscillation is one or more guide rails 125, guide rail 125 make balladeur train 126 can by the complete length of axle 121 keep simultaneously and the end face 103 of workpiece 102 between constant clearance.Sledge drive 133 makes balladeur train move along guide rail 125, and balladeur train pulse generator 134 makes balladeur train with respect to workpiece 102 lateral displacement take place.Be fixed on the balladeur train is to focus on platform 127.Focusing on platform 127 is fixed on the focusing guide rail 128.Focusing platform 127 moves both vertically with respect to balladeur train 126 and the device that lens 129 are focused on respect to end face 103 is provided.Focus driver 132 is positioned at and focuses on the platform 127, is used to make lens 129 to focus on.
Focus on the platform 127 and be fixed with lens 129, lens 129 are fixed in the nozzle 130.Nozzle 130 has introduces nozzle 130 to cool off and to keep the device 131 of lens 129 cleanings with Compressed Gas.The preferred nozzle 130 that is used for this purpose is described in the United States Patent (USP) 5,756,962 of James etc., and this patent is included this paper by reference in.
Be fixed on the terminal crooked mirror 135 of the condenser lenses 129 that in addition laser beam 136 led on the balladeur train 126.With the laser 137 beam directions end light beam crooked mirror 135 of the crooked mirror 138 of optional light beam with far-end.Though laser 137 directly can be guided into balladeur train 126 and not use the crooked mirror of light beam, the spatial constraints of laser and effectively being connected make long-range fix more desirable.
When laser 137 was excited, emitted light beams 136 reflected guiding lens 129 through the crooked mirror 135 of terminal light beam then through the crooked mirror 138 of first light beam.The approach of laser beam 136 is configured to, if mobile lens 129, then light beam will be by the longitudinal centre line of axle 121.When lens 129 in position the time, light beam can focus on the end face 103, under, on it or near it.
Though this equipment can be used for various laser, preferred laser is the flow at high speed CO that can produce up to 2500 watts of light beams
2Laser.Yet, also can adopt 50 watts the CO that flows at a slow speed
2Laser.
Fig. 4 is the sketch map of the control system of laser engraving equipment shown in Figure 3.When operation laser engraving equipment, the control variable of focal position, rotary speed and lateral velocity is sent to from master computer 142 by wiring 144 and drives computer 140.Drive computer 140 by focusing on platform driver 132 control focal positions.Drive the rotary speed of computer 140 by rotating driver 123 and rotating pulse generator 124 control workpiece 102.Drive the lateral velocity of computer 140 by sledge drive 133 and balladeur train pulse generator 134 control balladeur trains 126.Drive computer 140 and also Drive Status and possible errors are reported to master computer 142.This system can provide front position control and the surface of workpiece 102 effectively is divided into the zonule that is called pixel, and each pixel is made of the rotating driver pulse of fixed qty and the traverse drives pulse of fixed qty.Master computer 142 is also by wiring 143 control laser 137.
Can make the three-dimensional profile support member of laser engraving by the whole bag of tricks.A kind of method of making this type of support member is the combination of surface of the work laser boring and laser milling.
The method of workpiece being carried out laser boring comprises percussion drilling, baked wheaten cake (fire-on-the-fly) punching and raster scanning punching.
Preferable methods is the raster scanning punching.In the method, pattern is simplified as rectangle repeat element 141, and an example of this element is shown in Figure 11.This repeat element comprises makes the required full detail of required pattern.Just can obtain bigger required pattern when placed side by side when using as class ceramic tile thing and joining end to end in twos.
Repeat element 141 also can be divided into the grid of less rectangle unit or " pixel " 142.Although pixel is normally foursquare,, use the pixel of unequal ratio convenient for some purpose.Pixel self is nondimensional, and the actual size of image is set in the course of processing, promptly only sets the length 146 of wide 145 and pixel of pixel in actual punch operation.During punching, the length of pixel is set to the size corresponding to selected balladeur train pulse generator 134 umber of pulses.Equally, the wide size that is set to corresponding to rotating pulse generator 124 umber of pulses of pixel.Therefore, for ease of giving an example, the pixel shown in Fig. 5 a is a square; Yet, do not require that pixel is a square, but only require that they are rectangles.
Each row pixel is represented the focal position of workpiece by a laser.These row are repeated as required repeatedly to center on workpiece 102 fully.White pixel is represented laser " pass " instruction, and on behalf of laser, each black picture element " open " instruction.So just, obtained the simple binary file formed by 1 and 0, wherein, 1 (or white) is the instruction of closing laser, and 0 (or black) is the instruction of opening laser.
See Fig. 4 back, the content of engraving file sends to the master computer 142 of laser 137 by wiring 143 with the binary form that 1 representative is closed, 0 representative is opened.By changing the time between each instruction, the persistent period of instruction is adjusted to big or small consistent with pixel.After each row file is finished row are being handled, perhaps reprocessing is finished up to whole circumference.Though carried out the row instruction, laterally driver is only mobile a little.Set lateral velocity so that the circumference engraving when finishing horizontal driver mobile focusing lens and handle the next column pixel by the width of pixel column.Carry out continuously up to arriving the file end, more in the axial direction duplicate file up to reaching required width.
In the method, each by will on material, producing many narrow otch rather than a big hole.Because these otch are closely arrangements and slightly overlapping side by side, its cumulative effects is to have formed the hole.
The method of the three-dimensional profile support member of highly preferred manufacturing laser engraving is to pass through Laser Modulation.Laser Modulation is to be undertaken by the laser power that changes gradually on the pixel by pixel.In Laser Modulation, the instruction that simply opens or closes of raster scanning punching is conditioned the instruction of laser power gradual change scope replacement on each pixel in the Laser Modulation file.Adopt this mode can in once by workpiece, give the workpiece three dimensional structure.
Laser Modulation has some and is better than the advantage that other makes three-dimensional profile support member method.Laser Modulation can be made and not exist because of there being the single piece seamless support member of the pattern mispairing that seam causes.Adopt Laser Modulation, can be in single operation but not finish support member in the multi-pass operation, therefore improved efficient and lowered cost.Laser Modulation has been got rid of the pattern alignment issues that may bring problem in the multistep continued operation.Laser Modulation can also be created in the resemblance that has complex geometry on the certain distance.By changing the laser instruction, can accurately control the degree of depth and the shape of feature, and can be formed on the feature that continuously changes on the cross section.Simultaneously, the employing laser engraving can be kept the regular position between each hole.
Again with reference to figure 4, in the Laser Modulation process, master computer 142 can simply " open " or " pass " pattern outside pattern send instruction for laser 137.For example, available 8 (byte) patterns replace simple binary file, can change the power of Laser emission like this on 256 kinds of possible levels.Adopt byte mode, instruction " 11111111 " order laser shutdown, the whole power of " 00000000 " order Laser emission, and such as the designated command Laser emission of " 10000000 " all may laser power half.
The Laser Modulation file can produce by several different methods.A kind of such method is the computer picture structure image file with 256 color shade levels.In this gray scale, black can be represented whole power and white can be represented inactivity, the power level between various grey levels therebetween represent.Can use many computer picture programs to show or generate this laser engraving file.Utilize this file, thus but can be by the Laser emission power direct engraving three-dimensional profile support member on the pixel adjustment pixel.Though described the 8-bit pattern here but also available other level substitutes as 4,16,24 or other pattern.
Being used for the proper laser that laser engraving system carries out laser engraving is that power is output as 2500 watts flow at high speed CO
2Laser, but also can adopt the lower laser of output.That at first is concerned about is the essential transfer power level that can be fast as far as possible of laser.Preferred conversion ratio is at least 10kHz, and preferred conversion ratio is 20kHz.Need the high power conversion ratio so that handle pixel as much as possible each second.
Fig. 5 is the diagram of Laser Modulation file, comprises can be used to form support member to form the repeat element 141a of porous membrane shown in Fig. 1 a-1e.Fig. 5 a is the amplifier section of Laser Modulation file shown in Figure 5.
Fig. 5 b is the diagram of Laser Modulation file, comprises can be used to form support member to form the repeat element 141b of porous membrane shown in Fig. 1 e-j.Fig. 5 c is the amplifier section of Laser Modulation file shown in Fig. 5 b, the file part that centers on corresponding to Fig. 5 b medium ring " 5c ".Fig. 5 d is the amplifier section of Laser Modulation file shown in Fig. 5 b, the file part that centers on corresponding to Fig. 5 b medium ring " 5d ".Fig. 5 e is the amplifier section of Laser Modulation file shown in Fig. 5 b, the file part that centers on corresponding to Fig. 5 d medium ring " 5e ".
In Fig. 5-5e, black region 154a represents that the laser at this pixel place is required to launch whole power, thereby in the hole that forms on the support member corresponding to the hole 16 on the three-dimensional porous thin film 10 shown in Fig. 1 a-1d.The laser at light gray areas 155 these pixel places of expression is required to adopt very low-level power, thereby makes support surface complete basically.These zones of support member are corresponding to the little protuberance 11 shown in Fig. 1 a.The corresponding laser power level of representing with various grey levels among Fig. 5-5e of other Regional Representative and correspond respectively to Fig. 1 a-1d and Fig. 1 e-1j shown in thin film 10 and 100 various features.For example, zone 157 and 159 Crossware 14a and 14b corresponding to thin film 10 and thin film 100.
Fig. 6 is the microphotograph with file engraving shown in Figure 5 back support member part 161.Thereby the image on the support member part shown in Figure 6 repeats to produce the thin film 10 that repeat patterns shown in Fig. 1 a-1d is arranged in support surface.
Fig. 6 a is the microphotograph with file engraving shown in Figure 5 back support member part 162.Thereby the image on the part of support member shown in Fig. 6 a repeats to produce the thin film that has Fig. 1 e-1j shown type to repeat the butterfly pattern in support surface.Fig. 6 b is the amplifier section of support member shown in Fig. 6 a, corresponding to the support member part of Fig. 6 a that is centered on by ring " 6 " b.After finishing laser engraving, it can be assembled into structure shown in Figure 7 to be used as support member to workpiece.Two terminal bells 235 are identical with the inside of the workpiece 236 with laser engraving zone 237.These terminal bells can by machinery as shown belt 238 with screw 239 or by other machinery shrink-fit, compressed fit, be connected.It is ring-type that terminal bell can keep workpiece, drive the assembly finished and the structure of finishing is fixed in the perforating apparatus.
The preferred equipment of making this three-dimensional porous thin film is shown in Fig. 8.As shown in the drawing, support member is a rotatable drum 753.In this particular device, drum rotates in a counter-clockwise direction.Be positioned at outside the drum 753 is that the hot-air curtain directly is sprayed onto by the hot air nozzle 759 on the thin film of the supports support of laser engraving.The device of avoiding the withdrawal hot air nozzle 759 of superheated thin film when thin film stops or be mobile at a slow speed is provided.Aerator 757 and heater 758 cooperations provide hot-air for nozzle 759.Be positioned at drum 753 and nozzle 759 directly relative be vacuum head 760.Vacuum head 760 can radial adjusting and is contacted with the inner surface of drum 753.Provide vacuum source 761, with continuous emptying vacuum head 760.
Be placed on the support member 753 of laser engraving is thin film 751 that approach, successive, continual thermoplastic polymeric material.
Border circular areas amplification among Fig. 8 is shown in Fig. 9.Shown in this embodiment, vacuum head 760 has two vacuum slits 764 and 765 across the thin-film width extension.Yet for some purpose, each vacuum slit preferably adopts independently vacuum source.As shown in figure 23, when initial thin film during near air knife 758 vacuum slit 764 provide one to press down (hold down) district for thin film.Vacuum slit 764 links to each other with vacuum source by path 766.Can anchor to thin film 751 safety of introducing on the drum 753 like this and avoid launching the influence of the introducing thin film internal tension that thin film causes.Thin film 751 on drum 753 outer surfaces is flattened.The second vacuum slit 765 defines the vacuum punch block.It between the suction nozzle 764 and 765 intermediate supports rod 768.The position of vacuum head 760 can make the shock point of hot-air curtain 767 be positioned on the intermediate supports rod 768.Hot-air has enough temperature, and thin film is had enough angle of incidence, and apart from thin film enough distances is arranged, so that make the softening and distortion of thin film by applying power thereon.The geometry of equipment guarantees that the tension force that can not pressed down slit 764 and cooling zone 762 generations when thin film 751 is softened by hot-air curtain 767 influences (Figure 22).Vacuum punch block 765 proximity thermal air curtains 767, thus can make time of thin film heating the shortest and prevent that too much heat is delivered to support member 753.
With reference to figure 8 and 9, fexible film 751 is supplied with through carrying roller 752 from feed rolls 750.Roller 752 can be connected to load cell or other machinery enter thin film 751 with control feed tension.Thin film 751 contacts closely with support member 753 then.Thin film and support member enter into region of no pressure 764 then.In region of no pressure 764, pressure reduction makes thin film further strengthen with support member 753 and contacts.Vacuum pressure makes thin film break away from supply tension force then.Thin film and support combination pass to hot-air curtain 767 then.Hot-air curtain heating thin film and support combination and so soften film.
The thin film of thermal softening and support combination enter region of no pressure 765 then, and the thin film of heating is out of shape and is the profile of support member herein under differential pressure action.The thin film zone that is positioned at the heat on the support member open area further is out of shape the open area that enters support member.If heat and deformation force are enough, then the film breaks on the support member open area forms the hole.
Still the porous membrane and the support combination of heat pass to cooling zone 762 then.In the cooling zone, the capacity surrounding air passes through the thin film of perforation now with cooling thin film and support member.
Refrigerative thin film leaves support member then on carrying roller 754.Carrying roller 754 can be connected to load cell or other machinery with the control winding tension.Porous membrane passes to then to be finished roller (finish roll) 756 and rolls herein.
Absorption system--first absorbed layer
U.S. Patent No. 6,515,195 have discussed the absorption system that can be used for absorbent article described herein, and the purport of this patent is included this paper by reference in.
Side adjacent blanket layers 842 and what be attached to cover layer 842 is first absorbed layer 846 that forms an absorption system part within it.First absorbed layer 846 can be accepted body fluid and preserves body fluid and have an opportunity to absorb liquid up to the second following absorbed layer from cover layer 842, so it is as liquid transfer layer or catch layer.
Preferred first absorbed layer 846 is finer and close and have and have than cover layer 842 and more many aperture of ratio than cover layer 842.This specific character makes first absorbed layer 846 can contain body fluid and away from cover layer 842 outsides, thereby can prevent that allow liquids from arriving cover layer 842 and surface thereof.Yet preferred first absorbed layer 846 is not wanted too fine and close and is hindered liquid to enter the second following absorbed layer 848 by layer 846.
First absorbed layer 846 can be made up of fibrous material such as wood pulp, polyester, artificial silk, elastic foam etc. or their combination.First absorbed layer 846 can comprise thermoplastic fibre to stablize this layer and to keep its structural intergrity.The one or both sides of first absorbed layer 846 can be handled increasing its wettability through surfactant, but common first absorbed layer 846 is hydrophilic relatively and may need to handle.First absorbed layer 846 preferably connects or adheres to adjacent layer is cover layer 842 and the second following absorbed layer 848.
The density that is specially adapted to the material of first absorbed layer 846 is about 0.04-0.05g/cc, and basic weight is about 80-110g/m
2(gsm), thickness is about 2-3mm, especially 2.6mm.The example of the suitable material of first absorbed layer is to pass through the bonded paper pulp of air by what the Buckeye of Memphis, Tennessee State sold, be respectively that basic weight is the VIZORB 3008 of 110gsm, basic weight is the VIZORB 3010 of 90gsm, basic weight is the VIZORB 3003 of 100gsm and the VIZORB 3042 that basic weight is 100gsm.
Absorption system--second absorbed layer
Near first absorbed layer 846 and bonded with it be second absorbed layer 848.In one embodiment, second absorbed layer 848 is that the cellulose fiber peacekeeping places in the wood pulp cellulose or the admixture or the mixture of super absorber wherein.In an object lesson, second absorbed layer 848 is the materials that contain have an appointment 40-95 weight % cellulose fibre and about 5-60 weight %SAP (super absorber polymer).The water content of this material is lower than about 10 weight %.In the literary composition, statement " weight % " refers to the weight of material described in every part of final material weight.For example, 10 weight %SAP represent in every 100gsm material basis weight 10gsm SAP is arranged.
The cellulose fibre that is used for second absorbed layer 848 is well known in the art, comprises wood pulp, cotton, Caulis et Folium Lini and bog moss (peat moss).Preferred wood pulp.Paper pulp can be from acquisitions such as machinery or chemical-mechanical, sulphite, kraft pulp, slurrying garbage, organic solvent slurries.Needlebush and leaf wood all are useful.Preferred softwood pulp.Do not need to wait and handle cellulose fibre with the chemical Degumming agent, the cross-linking agent that use in the prior art.
Second absorbed layer 848 can comprise any super-absorbent polymer (SAP), and SAP is that this field is known.For purposes of the present invention, term " super-absorbent polymer " (or " SAP ") is meant and can absorbs under the pressure of 0.5psi and keep the material that is at least about its 10 times of weight body fluid.Super-absorbent polymer particles of the present invention can be inorganic or organic cross-linked hydrophilic polymer, as polyvinyl alcohol, poly(ethylene oxide) class, crosslinked starch, guar gum, Xanthan gum etc.Described granule can powder, granule, granule or fibers form exist.Being used for preferred super-absorbent polymer particles of the present invention is crosslinked polyacrylate, as Sumitomo Seika ChemicalsCo. by Osaka, Japan, and the SA60N Type II by name that Ltd. provides
*Product and by the ChemicalInternational of Yi Linuo Si state Palatine, the 2100A by name that Inc. provides
*Product.
In specific embodiment, second absorbed layer 848 is to contain the 40-95 weight % cellulose fibre of having an appointment, the say so material of about 60-80 weight % cellulose fibre more specifically.This material can contain the 5-60 weight %SAP that has an appointment, preferably about 20-55 weight %SAP, more preferably from about 30-45 weight %SAP, most preferably from about 40 weight %SAP.
In a preferred embodiment, second absorbed layer 848 is made by air press strip (air-laying) method.Second absorbed layer 848 of the present invention is highdensity, and in an object lesson, its density is greater than about 0.25g/cc.Especially, the density of second absorbed layer 848 is about 0.30-0.50g/cc.More particularly, its density is about 0.30-0.45g/cc and, is about 0.30-0.40g/cc more specifically.
Air press strip (Air-laid) absorber that makes is normally low-density.For realizing the higher density level, the example of second absorbed layer 848 that for example provides above is with pressure roller compressed air press strip material.Compression adopts method well known in the art to finish.This compression is normally finished under about 100 ℃ and every millimeter about 130 newton's of temperature power.Last compressing roller is formed from steel usually, and the flexible roller of lower compression roller about 85 SH D that are hardness.Preferred upper and lower compressing roller all is slick, but top roll can be carved.
The basis weight range of second absorbed layer 848 can be very wide.Second absorbed layer 848 is that basic weight can be about 100-700gsm.In one embodiment, its basis weight range is about 150gsm to about 400gsm.
Preferably, basic weight (basis weight) scope is about 200gsm to about 350gsm, is more preferably 300gsm.Second absorbed layer 848 and first absorbed layer cooperatively interact on function to reduce back wet possibility.First absorbed layer with relative open bore structure is easy to absorb and side direction dispersing liquid and be easy to liquid is transferred to the receiving surface of second absorbed layer therein.Conversely, having good capillary second absorbed layer effectively is attracted to liquid wherein from first absorbed layer.In case liquid is absorbed into super-absorbent polymer, then exerting pressure can not discharge liquid subsequently.Therefore, the liquid that absorbs superabsorbent material is just forever caught.Simultaneously, second absorbed layer helps to reduce the ratio that is retained in the liquid in first absorbed layer from the power of the first absorbed layer imbitition, thereby has reduced the amount of returning tectal liquid when sanitary towel faces mechanical load.In addition, first absorbed layer has high relatively capillarity, and therefore, because any strength of fluid in first absorbed layer that mechanical load causes all can reassign to low concentration in this material, this has reduced the amount that may return tectal liquid again.
In one embodiment, second absorbed layer contains the 30-40 weight % superabsorbent material of having an appointment, and its basic weight is about 200-400gsm, and density is about 0.2-0.45g/cc.Even if make multilayer material, the final thickness of formed second absorbed layer 848 is also lower.Thickness can be about 0.5-2.5mm, and in one embodiment, thickness is about 1.0-2.0mm, more specifically is about 1.25-1.75mm.
For understanding the further details of second absorbed layer, 848 structures and constructive method, the reader can be referred to the U.S. Patent No. 5,866,242 of authorizing people such as Tan on February 2nd, 1999.The content of the document is included this paper by reference in.
Barrier layer
Be barrier layer 850 below the absorption system 848, it contains makes liquid-tight material, flows out sanitary towel and pollutes the underwear of user to prevent liquid in the absorption system 848.Barrier layer 850 is preferably made by polymeric membrane, but it also can by liquid can't see through but the permeable material of air make, as through non-woven fabrics or the microporous membrane or the foamed materials of water-proofing treatment.
Test article
Compare test sample #1-Always Regular Ultrathin is available from the Procter ﹠amp of Cincinnati, Ohio; Gamble, Co..Always Regular Ultrathin product comprises the green area that is arranged in central authorities substantially.
Compare test sample #2-Always Regular Maxi is available from the Procter ﹠amp of Cincinnati, Ohio; Gamble, Co..Always Regular Maxi product comprises the blue region that is arranged in central authorities substantially.
Specimen #1 of the present invention-goods of the present invention are constructed as follows:
(1) cover layer-as mentioned above and with reference to Fig. 1 e-1j by forming first porous membrane structure, is described below.The upper surface of the relative thin film of upper surface of Crossware 14a and 14b 4.5 mils that cave in, Crossware 14a and 14b width separately is respectively 5 mils and 9 mils.Crossware 14a and 14b length separately is respectively 100 mils and 60 mils.Thin film comprises the big butterfly pattern of many Fig. 1 e shown types and the less butterfly pattern of many Fig. 1 e shown types.It is of a size of 1.0 inches when the distal point farthest of another wing is measured from the distal point farthest than big butterfly one wing, and the narrowest part of butterfly waist is 0.6 inch.It was of a size of 0.6 inch when the distal point farthest from the distal point farthest of less butterfly one wing to another wing was measured, and the narrowest part of butterfly waist is 0.4 inch.Therefore bigger and less butterfly equal intervals has 9 big butterflies and 9 little butterflies equal intervals on thin film sample cloth on the porous membrane sample cloth of 9 inches (length) * 6 inch (wide).Big butterfly and little butterfly comprise border 108 separately and are arranged in the interior a plurality of holes 106, zone that limited by the border.Border 108 wide 78 mils of each big butterfly, border 108 wide 31 mils of each less butterfly.For bigger and less butterfly, the film surface in the thin film zone 109 that is limited by border 108 is all with respect to top surface about 4.5 mils that cave in.There are a plurality of holes 106 in the zone that is limited by border 109 less and big butterfly, and each hole 106 is the ellipse of major axis 43 mils, minor axis 16 mils.Horizontal range between the adjacent holes 106 " n " is 40 mils, and the vertical dimension between the adjacent holes " o " is 34 mils.
(2) transfer layer-by the bonded 100gsm paper pulp of air, available from the BuckeyeTechnologies Incorporated of Memphis, Tennessee State, the product code name is VIZORB 3042.Its end face promptly is printed on transfer layer towards tectal surface, and printing is adopted available from Philadelphia, Pennsyivania Rohm﹠amp; The Acryjet of Haas Co.
TMThe fabric ink sprays CV printing ink, and product code is RH-10246118 (black), RH-10246119 (cyan), RH-10246120 (yellow), RH-10246171 (fuchsin).Transfer layer is with the printing of Mimaki ink-jet printer and adopt printing ink, thereby the pattern that obtains on transfer layer is corresponding with the coloured moiety 802 and 804 of goods shown in Figure 1.The L of transfer layer coloured moiety, a
*And b
*Value adopts Minolta CR-321 color measurement system (SN209810050) directly to measure from transfer layer with the 3mm aperture, is respectively L=81.01, a
*=-4.87 and b
*=-7.99.So constitute transfer layer, thereby total absorption area of sanitary towel is 15,300mm
2, the area of first coloured moiety is 3,900mm
2(account for total absorption area 26%), the area of second coloured moiety is 1,100mm
2(account for total absorption area 7%).
(3) 225gsm compression paper pulp/super absorber core, (Jessup, GA), product code is J2250525 available from EAM Corporation.
(4) 20gsm polyethylene film barrier, (Schaumburg, Illinois), product code is XP-3492B available from Pliant Corporation.
Test fluid flow
The test fluid flow that is used for following method of testing has following composition:
(1) 49.45% 0.9% sodium chloride solution (VWR catalogue #VW 3257-7);
(2) 49.00% glycerol (Emery 917);
(3) 1% phenoxyethanol (Clariant Corporation Phenoxetol
TM);
(4) 0.45% sodium chloride (Baker sodium chloride crystal #9624-05);
(5) 0.11%FD﹠amp; The C#40 orchil (Waner Jenkinson, South Plainfield, NJ).
Above-mentioned percentage ratio is weight percentage.
Measure response dyeing in the goods coloured moiety and the method for testing of generation change color
Each 5 sample with following method of testing test comparison example and sample of the present invention.
Need to measure L, a
*And b
*The equipment of value adopts 3mm inside diameter measurement L, a here to carry out this method of testing with Minolta CR-321 color measurement system
*And b
*Value.
Remove with all packings of each specimen and with specimen and in the room of 21 ℃+/-1 ℃ and relative humidity 50%+/-2.0%, placed 1 hour.
The specimen of specific products is placed on flat surfaces, and the cover layer of goods up.Read the L, a that are placed on position goods on the vaginal opening when product uses
*And b
*Reading.The hole of this equipment should be placed in coloured zone fully.Record is unstained or L, a of " cleaning " sanitary towel
*And b
*Value.
There is the test slab of oval opening to be placed on the product cover layer central array, the central row of oval opening is listed on the goods part that will be placed on when using on the vaginal opening.Test slab is made of the Merlon flat board of 25.4 centimetres of 7.6 thick 1.3 centimetres cm x, and there is oval opening in its central authorities.The major axis of oval opening is 3.8 centimetres, and minor axis is 1.9 centimetres.With the graduated 10cc syringe that the 7cc test liquid is housed test fluid flow is injected oval opening.In case liquid is absorbed and just remove test slab can see cover layer again the time.
After the dyeing, make goods balance 5 minutes at room temperature.Measure L, a that will be placed on the goods coloured portions on the vaginal opening when using product
*And b
*Value.
5 outturn samples are repeated said process and calculate average L, a of clean goods and dyeing articles
*And b
*Value.Calculate average L, a of clean goods and dyeing articles
*And b
*Calculate the mean change Δ L of L after the value, a
*Mean change Δ a
*And b
*Mean change Δ b
*Following tabular has gone out comparing the value that specimen #1, compare test sample # 2 and specimen #1 of the present invention record.
The coloured zone of table 1-compare test sample #1-is before the dyeing
| Specimen | ?L | a * | ?b * |
| #1 | ?86.71 | -5.97 | ?0.13 |
| #2 | ?87.42 | -5.79 | ?0.09 |
| #3 | ?86.59 | -6.04 | ?0.22 |
| #4 | ?87.13 | -6.11 | ?0.27 |
| #5 | ?85.73 | -6.49 | ?0.60 |
| On average | ?86.72 | -6.08 | ?0.26 |
The coloured zone of table 2-compare test sample #1-is after the dyeing
| Specimen | ?L | ?a * | ?b * |
| #1 | ?67.99 | ?13.85 | ?0.84 |
| #2 | ?65.88 | ?15.80 | ?1.41 |
| #3 | ?67.43 | ?14.44 | ?0.86 |
| #4 | ?67.44 | ?13.46 | ?0.15 |
| #5 | ?66.83 | ?13.59 | ?0.45 |
| On average | ?67.11 | ?14.23 | ?0.74 |
The coloured zone of table 3-compare test sample #1-, average delta L, Δ a
*, Δ b
*
| ΔL | ?Δa * | ?Δb * |
| 19.61 | ?20.31 | ?1.00 |
The coloured zone of table 4-compare test sample #2-is before the dyeing
| Specimen | ?L | a * | b * |
| #1 | ?87.67 | -5.76 | -7.64 |
| #2 | ?87.39 | -5.05 | -7.25 |
| #3 | ?86.62 | -5.32 | -7.29 |
| #4 | ?87.55 | -5.64 | -7.49 |
| #5 | ?88.16 | -5.26 | -7.06 |
| On average | ?87.48 | -5.47 | -7.35 |
The coloured zone of table 5-compare test sample #2-is after the dyeing
| Specimen | ?L | ?a * | ?b * |
| #1 | ?75.03 | ?12.37 | ?0.64 |
| #2 | ?74.08 | ?13.37 | ?1.40 |
| #3 | ?72.95 | ?14.41 | ?1.69 |
| #4 | ?71.99 | ?15.52 | ?2.34 |
| #5 | ?70.59 | ?18.08 | ?3.24 |
| On average | ?72.93 | ?14.75 | ?1.86 |
The coloured zone of table 6-compare test sample #2-, average delta L, Δ a
*, Δ b
*
| ΔL | Δa * | Δb * |
| 14.55 | 20.22 | 9.21 |
The coloured zone of table 7-specimen #1-of the present invention is before the dyeing
| Specimen | ?L | a * | b * |
| #1 | ?90.74 | -4.38 | -7.49 |
| #2 | ?89.95 | -4.35 | -7.55 |
| #3 | ?90.03 | -4.73 | -8.31 |
| #4 | ?90.35 | -4.45 | -7.76 |
| #5 | ?90.54 | -4.56 | -7.64 |
| On average | ?90.32 | -4.49 | -7.75 |
The coloured zone of table 8-specimen #1-of the present invention is after the dyeing
| Specimen | ?L | ?a * | b * |
| #1 | ?77.11 | ?6.83 | -2.18 |
| #2 | ?71.30 | ?6.91 | -3.79 |
| #3 | ?76.32 | ?6.94 | -2.10 |
| #4 | ?76.47 | ?5.61 | -3.18 |
| #5 | ?78.95 | ?5.75 | -2.93 |
| On average | ?76.03 | ?6.41 | -2.84 |
The coloured zone of table 9-specimen #1-of the present invention, average delta L, Δ a
*, Δ b
*
| ΔL | ?Δa * | Δb * |
| 14.29 | ?10.90 | 4.91 |
As implied above, absorbent article of the present invention can be resisted red staining, in other words can resist Δ a
*In addition, the coloured moiety of absorbent article can be resisted red staining color " shallow " before use simultaneously.Preferably, the average L-value of absorbent article coloured moiety of the present invention L＞80 before dyeing, more preferably L＞85.In addition, the coloured moiety of goods of the present invention Δ a after dyeing
*Less than 18, be more preferably less than 15, most preferably less than 12.At this moment, absorbent article of the present invention provides cleaning, light outward appearance for user before use, can make painted red feature minimum simultaneously after use.
Measure response dyeing in the goods colourless part and the method for testing of generation change color
After testing the goods coloured moiety of each product, should test the colourless part of each goods with the same manner.For carrying out this method of testing, need each product of 5 new cleanings of test.5 specimen of each Comparative Examples and sample of the present invention have been tested.
Should test the goods colourless part of the achromatic region that is fit to be placed on the goods part on the vaginal opening when using L,
*A and b
*Value.The possibility quilt was through the painted goods achromatic region of liquid when test was used in this way.Measure L, a of 5 specimen colourless parts
*And b
*Value is also calculated average L, a
*And b
*Value.Afterwards with above-mentioned to the described same mode of the coloured moiety colourless part that dyes.L, a of 5 coloured differently specimen of record
*And b
*Value also writes down average L, a
*, b
*Value.
Calculate average L, a of clean goods and dyeing articles
*And b
*Calculate the mean change Δ L of L after the value, a
*Mean change Δ a
*And b
*Mean change Δ b
*Following tabular has gone out comparing the value that specimen #1, compare test sample # 2 and specimen #1 of the present invention record.
Table 10-compare test sample #1-achromatic region is before the dyeing
| Specimen | ?L | a * | ?b * |
| #1 | ?94.73 | -0.81 | ?0.44 |
| #2 | ?95.29 | -0.87 | ?0.43 |
| #3 | ?95.09 | -0.74 | ?0.45 |
| #4 | ?95.84 | -0.70 | ?0.40 |
| #5 | ?93.82 | -0.78 | ?0.45 |
| On average | ?94.95 | -0.78 | ?0.43 |
Table 11-compare test sample #1-achromatic region is after the dyeing
| Specimen | ?L | ?a * | ?b * |
| #1 | ?68.35 | ?15.92 | ?1.64 |
| #2 | ?67.78 | ?16.08 | ?1.50 |
| #3 | ?68.14 | ?15.03 | ?0.94 |
| #4 | ?67.17 | ?15.39 | ?1.08 |
| #5 | ?67.94 | ?16.11 | ?1.41 |
| On average | ?67.88 | ?15.71 | ?1.31 |
Table 12-compare test sample #1-achromatic region, average delta L, Δ a
*, Δ b
*
| ΔL | ?Δa * | ?Δb * |
| 27.07 | ?16.49 | ?0.88 |
Table 13-compare test sample #2-achromatic region is before the dyeing
| Specimen | ?L | a * | ?b * |
| #1 | ?97.05 | -0.60 | ?1.07 |
| #2 | ?96.17 | -0.79 | ?1.89 |
| #3 | ?94.94 | -0.82 | ?1.35 |
| #4 | ?95.30 | -0.76 | ?1.51 |
| #5 | ?94.83 | -0.88 | ?1.50 |
| On average | ?95.66 | -0.77 | ?1.46 |
Table 14-compare test sample #2-achromatic region is after the dyeing
| Specimen | ?L | ?a * | ?b * |
| #1 | ?72.20 | ?20.91 | ?5.43 |
| #2 | ?72.94 | ?21.84 | ?5.90 |
| #3 | ?73.33 | ?21.42 | ?5.97 |
| #4 | ?72.63 | ?20.94 | ?4.97 |
| #5 | ?72.16 | ?22.84 | ?6.23 |
| On average | ?72.65 | ?21.59 | ?5.70 |
Table 15-compare test sample #2-achromatic region, average delta L, Δ a
*, Δ b
*
| ΔL | ?Δa * | ?Δb * |
| 23.01 | ?22.36 | ?4.24 |
Table 16-specimen #1-achromatic region of the present invention is before the dyeing
| Specimen | ?L | a * | b * |
| #1 | ?93.10 | -0.80 | -0.20 |
| #2 | ?95.85 | -0.96 | 1.23 |
| #3 | ?96.84 | -0.74 | ?1.29 |
| #4 | ?96.45 | -0.86 | ?1.42 |
| #5 | ?92.73 | -0.70 | ?-0.12 |
| On average | ?94.99 | -0.81 | ?0.72 |
Table 17-specimen #1-achromatic region of the present invention is after the dyeing
| Specimen | ?L | ?a * | ?b * |
| #1 | ?76.83 | ?11.02 | ?0.66 |
| #2 | ?77.82 | ?12.68 | ?1.40 |
| #3 | ?77.40 | ?11.66 | ?1.37 |
| #4 | ?77.60 | ?12.14 | ?1.17 |
| #5 | ?77.20 | ?13.61 | ?2.37 |
| On average | ?76.97 | ?12.22 | ?1.39 |
The coloured zone of table 18-specimen #1-of the present invention, average delta L, Δ a
*, Δ b
*
| ΔL | ?Δa * | Δb * |
| 18.02 | ?13.03 | 0.67 |
Above data show is by low Δ a
*Reading as can be known, even if the colourless part of sanitary towel of the present invention also shows the opposing red staining.
Claims (18)
1. sanitary towel, it comprises:
Surface towards health;
In use be fit to be arranged in the part on the vaginal opening;
First coloured moiety, described coloured moiety extends beyond so at least part: sanitary towel will be placed on the part on the vaginal opening during use;
Colourless part;
Wherein said first coloured moiety has first color that the surface towards health records from described before dyeing;
Described first coloured moiety has second color that the surface towards health records from described after dyeing;
The average L-value of described first color is greater than 80; With
Δ a between described first color and described second color
*Less than 18.
2. sanitary towel as claimed in claim 1 is characterized in that, the Δ a between described first color and described second color
*Less than 15.
3. sanitary towel as claimed in claim 1 is characterized in that, the Δ a between described first color and described second color
*Less than 12.
4. sanitary towel as claimed in claim 1 is characterized in that, the average L-value of described first color is greater than 85.
5. sanitary towel as claimed in claim 1 is characterized in that, described sanitary towel comprises imaginary longitudinal centre line and imaginary cross central line, and described first coloured moiety extends along described longitudinal centre line.
6. sanitary towel as claimed in claim 5 is characterized in that, described first coloured moiety is arranged into respect to longitudinal centre line and cross central line and is symmetry.
7. sanitary towel as claimed in claim 1, it also comprises:
Second coloured moiety.
8. sanitary towel as claimed in claim 7 is characterized in that, described second coloured moiety comprises the ring that extends around described first coloured moiety.
9. sanitary towel as claimed in claim 8 is characterized in that, described ring and described first coloured moiety separate, thereby between described first coloured moiety and described second coloured moiety achromatic region is arranged.
10. sanitary towel as claimed in claim 9 is characterized in that the width of described ring is about 1-5mm.
11. sanitary towel as claimed in claim 1 is characterized in that, described first coloured moiety extends beyond about 15-40% on the surface of described sanitary towel absorption portion.
12. sanitary towel as claimed in claim 11 also comprises second coloured moiety, wherein said second coloured moiety extends beyond the about 3-12% in absorption portion surface of described sanitary towel.
13. sanitary towel as claimed in claim 1 also comprises:
Cover layer;
Barrier layer; With
Be arranged in the nonferrous layer between described cover layer and the described barrier layer.
14. sanitary towel as claimed in claim 1 is characterized in that, the average L-value of described first color is about 80-92, average a
*Value between-6.0 and-3.5, average b
*Value is approximately between-5.0 peace treaties-10.
15. sanitary towel as claimed in claim 14 is characterized in that, the average L-value of described first color is about 85-92, average a
*Value is being made an appointment with between-5.5 peace treaties-4.0, average b
*Value is approximately between-7.0 peace treaties-9.0.
16. sanitary towel as claimed in claim 1 is characterized in that, described colourless part has average L, a that the surface towards health records from described before dyeing
*And b
*Value;
Wherein said colourless part has average L, a that the surface towards health records from described after dyeing
*And b
*Value; With
Average a before wherein dyeing
*Average a after value and the dyeing
*Δ a between the value
*Less than 16.
17. sanitary towel as claimed in claim 16 is characterized in that, described Δ a
*Less than 15.
18. sanitary towel as claimed in claim 16 is characterized in that, described Δ a
*Less than 14.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77268406P | 2006-02-13 | 2006-02-13 | |
| US60/772,684 | 2006-02-13 | ||
| US11/550,149 US8148597B2 (en) | 2006-02-13 | 2006-10-17 | Absorbent article having stain resistant properties |
| US11/550,149 | 2006-10-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101019794A true CN101019794A (en) | 2007-08-22 |
| CN101019794B CN101019794B (en) | 2013-02-27 |
Family
ID=38707720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710084039 Active CN101019794B (en) | 2006-02-13 | 2007-02-12 | Absorbent article having stain resistant properties |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101019794B (en) |
| ZA (1) | ZA200701248B (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA866656B (en) * | 1985-09-12 | 1987-04-29 | Kimberly Clark Co | Foraminous net cover for absorbent articles |
| SG103382A1 (en) * | 2002-01-11 | 2004-04-29 | Uni Charm Corp | Colored absorbent article |
-
2007
- 2007-02-12 ZA ZA200701248A patent/ZA200701248B/en unknown
- 2007-02-12 CN CN 200710084039 patent/CN101019794B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200701248B (en) | 2009-05-27 |
| CN101019794B (en) | 2013-02-27 |
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