Classifications

• • 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
  • D04H18/00—Needling machines
  • D04H18/04—Needling machines with water jets
• • 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
  • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
• • 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
  • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/425—Cellulose series
• • 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
  • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4266—Natural fibres not provided for in group D04H1/425
• • 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
  • D04H1/46—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 needling or like operations to cause entanglement of fibres
  • D04H1/492—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 needling or like operations to cause entanglement of fibres by fluid jet

Definitions

• the present invention relates to the technique of hydraulic bonding or hydroliage of a sheet of fibers, and is aimed in particular at a means for obtaining a determined surface condition on a sheet of cellulosic fibers, in particular hydrophilic cotton, optionally in admixture with artificial or synthetic fibers.
• the present invention also relates to a hydraulically linked ply.
• a known hydroliage process consists in treating a sheet of fibers using high-pressure water jets, with the aim of entangling all or part of the fibers and modifying some of its characteristics. This process seeks in particular to modify its mechanical strength and linting.
• the fiber sheet is supported by a porous fabric which moves in a direction perpendicular to the alignments of the water jets.
• an injector comprises a high pressure chamber in the form of a channel communicating on one side with a blade provided with calibrated perforations, of circular shape, all of the same diameter and of suitable profile.
• the blade is designated in the present field by the term strip. It is this term which is used subsequently.
• the distribution channel is supplied by pumps supplying water at a high pressure, from a few bars to 300 bars.
• the perforations commonly have a diameter of between 80 ⁇ m and 200 ⁇ m and are regularly spaced along the strip. The spacing is between 0.2 and 10 mm. There are commercially available metal strips with one to three rows of perforations. In the case of more than one row, the perforations are staggered.
• the porous fabric on which the sheet of fibers is extended, is driven along a flat table or else on a cylinder set in rotation.
• the fabric allows water to pass through the fibrous web, and a suction means provided under the fabric ensures its evacuation.
• this device From a certain grammage or thickness of the sheet, this device has the immediately visible result of producing a relief formed by continuous lines, generally rectilinear, parallel to each other, and regularly spaced on the surface of the sheet.
• the lines are particularly visible when the jets are spaced from each other by at least one millimeter and with sufficient pressure. These lines are aligned in the direction of travel of the web.
• the sheet of fibers is preferably made up of cellulosic fibers and in particular hydrophilic cotton fibers, optionally mixed with other fibers, artificial or synthetic.
• Patent EP 1 106 723 in the name of the applicant describes a tampon cut from a sheet of hydrophilic cotton having a grammage of at least 150 g / m 2 comprising recessed ridges spaced 1 to 8 mm apart and a streak depth at least 0.25 mm.
• This tablecloth also has a certain tensile strength.
• the other side also includes streaks but their spacing and depth are different from those of the first.
• This type of sheet is produced, for example, by hydroliage.
• the sheet is entrained under jets having an appropriate spacing and energy according to the relief which it is desired to obtain.
• the water jets of the hydraulic binding means form groups with jets spaced apart by a distance of between 0.4 and 1 , 2 mm, the groups of jets being spaced from each other by a distance of between 1, 2 and 4 mm. It is thus possible to produce plies having different reliefs between the two faces while avoiding the problem of linting for large gaps between the streaks.
• a cotton product is obtained, the two faces of which are distinguished from each other, which retains its qualities of mechanical resistance: resistance to fluffing, resistance to delamination in particular, and softness. One side has a more itchy effect than the other for cleaning.
• the Applicant constantly pursues the objective of offering the user improved products.
• the applicant has set itself as another objective the production of a sufficiently thick product with a relief which would make it possible to provide the skin with the quantity of cleansing milk. or necessary lotion but also to strengthen their make-up removing action, by friction without irritating the skin.
• it is aimed at a thick fibrous product which keeps bulking, a good level of resistance in both walking and cross direction, and good absorption while being hydraulically linked.
• a hydraulic bonding process of a sheet of fibers consisting of placing the sheet on a porous support movable in translation or in rotation around an axis, treating at least one face of the sheet with means of a plurality of water jets arranged in a row perpendicular to the direction of travel of the sheet, characterized in that the row comprises jets with a first section and at least jets with a second section different from the first .
• a hydraulic bonding process of a sheet of fibers consisting of placing the sheet on a porous support movable in translation or in rotation around an axis, treating the sheet using a plurality of water jets arranged in at least two rows perpendicular to the direction of travel of the web, characterized in that the rows include jets with a first section and at least jets with a second section different from the first, at at least one row comprising jets whose spacing between them is not constant.
• the hydraulic diameter is not constant. By hydraulic diameter is understood the diameter of the circle having the same area as the section considered. For example for an oval or polygonal section, the hydraulic diameter is the diameter of the circle which has the same area.
• the web is treated with jets arranged in at least two rows parallel to each other.
• the number of rows is at most equal to four.
• the process is particularly advantageous when the jets are produced by the same injector. This ensures good synchronization between the steps of the successive rows. We master the patterns on the tablecloth and therefore on the finished products.
• a row comprises jets forming groups spaced from each other, the next row having jets not aligned in the direction of travel of the web with the jets of the first row .
• a row comprises jets forming groups spaced from one another, the row which follows has jets partly aligned in the direction of travel of the web, with those of the first row.
• the first row comprises jets of a first section and the next row of jets of a second section.
• the first row comprises jets of a first section and jets of a second section, the next row comprising jets of a second section or else jets of a second section and jets from a third section.
• the process is applied to one side of the web. It can also be applied on both sides.
• the patterns on both sides can be the same or different.
• the fibers are essentially cellulosic fibers, in particular cotton.
• the tablecloth comprises from 70 to 100% of cotton fibers and from 0 to 30% of artificial or synthetic fibers.
• the sheet can have a weight up to 400 g / m 2 ; preferably the grammage is greater than 150 g / m 2 .
• the sheet is transformed into products in the form of round, oval, square or rectangular pads or any other shape for cosmetic or other use as is known.
• the invention also relates to a device for implementing the method, in which the jets are produced by perforations or orifices formed along a strip arranged opposite a water distribution channel.
• This device is characterized by the fact that the perforations are arranged along the same strip and have different sections.
• the strip has at least two rows of perforations.
• the perforations of the same row have the same section, this section being different from the perforations of the other row.
• the invention also relates to a sheet of fibers hydraulically linked by water jets comprising on at least one face grooves formed by said hydraulic bonding. It is characterized by the fact that it comprises at least first deep grooves of 50 to 600 ⁇ m with a spacing between a first groove and an adjacent groove of between 0.2 and 5 mm, and at least a second deep groove of 200 at 1000 ⁇ m with a spacing between the second groove and an adjacent groove of between 2 and 9 mm, the depth and the spacing of the second groove being greater than that of the first grooves.
• the depth of the grooves is defined from a cross section perpendicular to their direction, on one face.
• a groove has two sides, a right side and a left side. Each flank extends between the bottom of the groove and the first vertex encountered from the bottom. The depth of a groove is the difference in level between the top of one of the flanks and the bottom of the latter.
• the depth is defined as an average value from the two values measured on either side of a vertex between two adjacent grooves.
• the spacing is defined by the distance between the bottom of two adjacent grooves. This bottom is generally in the form of N.
• EP 1310226 It relates to a cotton wool pad for cosmetic use, the two faces of which have fine parallel grooves having a depth of 0.1 to 0.2 mm and a spacing of 0.5 to 0.7 mm formed by water needling, and at least one face also has wide grooves having a depth of about 0.3 to 0.8 mm and a spacing d '' about 9.0 to 15.0 mm. It is noted that this product is obtained by a first passage of the fiber web under an injector forming the fine furrows then under a second injector forming the broad and deep furrows. It follows that the broad grooves are formed in overprint after a first binding by the fine-jet injectors.
• the ply of the invention differs from the subject of the previous patent application by the fact that the second deeper grooves are visually distinct and spaced from the fine grooves. They form separate groups. By the presence of unbound zones, the advantages of softness, absorption and thickness of an unbound web are combined with the mechanical strength and the lint-free surface of a hydraulically linked web.
• the sheet comprises groups of at least two second adjacent grooves and preferably at most six second adjacent grooves. Strip-shaped zones are thus created with an apparent relief comprising non-hydrolated surfaces where the fibers are not hydraulically associated, giving greater softness to the touch.
• the first grooves Preferably have a depth of between 50 and 250 ⁇ m. They form areas of higher binding density than the previous ones.
• the spacing between a first groove and the adjacent groove closest to the latter is between 0.2 and 2 mm, and more particularly between 1 and 2 mm. Furthermore, the spacing between a second groove and the closest adjacent groove thereof is preferably between 3 and 5 mm.
• the ply has third grooves different from the first and second grooves.
• the third grooves differ from the other two by the depth.
• the third grooves differ from the other two also by the spacing.
• FIG. 1 schematically represents a conventional hydraulic binding installation
• FIG. 2 schematically represents and in section an injector with a perforated strip
• FIG. 3 represents schematically a sectional view of a sheet treated with a profile at different levels
• FIGS. 4 to 9 schematically represent different arrangements of perforations according to the different rows
• FIGS. 10 and 10A respectively show the pattern of the perforations of an injector and the profile as measured after carrying out hydraulic tying tests
• FIGS. 11 and 11 A respectively show a pattern of perforations of an injector and the profile as measured after carrying out second hydraulic tying tests
• FIGS. 1 schematically represents a conventional hydraulic binding installation
• FIG. 2 schematically represents and in section an injector with a perforated strip
• FIG. 3 represents schematically a sectional view of a sheet treated with a profile at different levels
• FIGS. 4 to 9 schematically represent different arrangements of perforations according to the different rows
• FIGS. 10 and 10A respectively show the pattern of the perforations of an
• FIGS. 12 and 12A show respectively an injector perforation pattern and the profile as measured has after completion of third hydraulic tying tests
• FIGS. 13 and 13A respectively show a pattern of perforations of an injector and the profile as measured after completion of fourth hydraulic tying tests
• FIG. 14 shows another variant of arrangement of the orifices .
• FIG. 1 there is shown schematically an installation for hydraulic bonding of a sheet of fibers.
• the sheet N whose grammage is preferably greater than 150 g / m 2 , is supported and driven on an endless belt 10. It is then transferred to a perforated cylinder 20 rotating around a horizontal axis. The sheet then passes in front of an injector 22 arranged perpendicular to the direction of travel of the sheet.
• the injector perforations distributed over the entire width of the sheet, are supplied with pressurized water from a pump, and deliver water jets towards the sheet N.
• a vacuum slot 24 On the opposite side of the sheet, at the inside the cylinder, a vacuum slot 24 has been provided to ensure the evacuation of the water once it has passed through the sheet and the porous fabric forming the envelope of the cylinder.
• the sheet is taken to a drying station, for example.
• a single injector has been shown; according to other embodiments, there is a second or more injectors in parallel with the first, and this on each of the
• the injector is shown in more detail in Figure 2; it includes a distributor 221 in the form of a rectilinear channel, here in cross-section.
• This channel comprises a grid 224 for distributing fluid along its axis.
• a strip 30 has been mounted comprising the perforations.
• the strip is interchangeable and held by jaws along its axis.
• Pressurized water fills the distribution channel from a supply duct, not shown.
• the water is guided through the grid 224 then passes through the strip 30 in as many jets as there are openings in the strip.
• These perforations or orifices have a profile formed in the thickness of the strip which is adapted to produce stable jets in the form of cylindrical needles.
• Such a profile may successively include, for example, a cylindrical portion and a divergent portion.
• the injection orifices of the prior art all have a circular section. In addition, their diameter is constant from one end to the other of the strip.
• the strip can comprise up to three rows of injection orifices staggered. The purpose of the arrangement in two or three rows is to allow greater resistance to the web, with the same injector.
• a complex relief structure is produced on the surface of the nonwoven resulting from the binding of the web.
• An example of a profile of such a structure is shown in FIG. 3.
• the deeper zones A serve as a reservoir for make-up removal products or for care milks to be applied to the skin.
• the less deep areas B are the active parts for removing make-up due to the close contact with the skin. They are reinforced by the intermediate zones between zones A and zones B.
• zones A and B may have different widths.
• the type of structure such as that shown in FIG. 3 is obtained by means of perforations provided on the strip according to the process of the invention. The perforations are assimilated to the jets produced.
• FIG 4 There is shown in Figure 4 the arrangement of perforations to obtain a profile of the type shown in Figure 3. This representation and the following are not to scale.
• the diameter of the perforations has been enlarged for a better understanding of the invention. They are arranged in two rows parallel to each other perpendicular to the direction of travel of the sheet of fibers. A first row is composed of circular perforations 14 with a first diameter. They are grouped by five with a first spacing between them. The perforations produce defined jets from their section.
• Each group is spaced from its adjacent group by a distance greater than the first spacing.
• the spacing between the perforations of a group can be 0.2mm or more and the spacing between two adjacent groups can be greater than 2mm, the diameter of the perforations being 80 to 300 ⁇ m.
• perforations 24 whose diameter is different from that of the perforations 14. They are here arranged in the interval between two adjacent groups of the first row.
• Each group in the second row has two perforations arranged so as to be inserted between the groups in the first row.
• the two rows are arranged on the same strip because the perforations are then supplied under the same hydraulic conditions, in particular pressure.
• the jets from the larger diameter perforations therefore have greater energy since the energy in this case is related to the flow rate.
• the ridges or grooves formed by the latter are deeper than the ridges formed by the first row. There is no interference between the jets from the perforations of the two rows. The streaks are well separated. It is the best solution to properly synchronize the water jets and master the final pattern.
• FIG. 4A shows the arrangement of the perforations in a single row. This comprises perforations with a first section 14A and perforations according to a second section 24A, different from the first.
• FIG. 5 shows another arrangement of perforations. It differs from the previous one by adding perforations 15 'opposite the perforations 25 in the next row.
• These perforations 15 ′ differ from the perforations 15 by their longitudinal profile, not shown. They produce more diffuse jets and therefore less marked grooves. The hydraulic characteristics of these perforations are for example degraded with respect to those of the perforations 15 so that the jets produced have little effect on the surface of the sheet. Their function is to prepare the tablecloth to receive the jets of the next row which score better.
• FIG 6 there are shown perforations 26 on the second row which have a non-circular section.
• the shape is oval with an axis inclined with respect to the alignment of the perforations 16.
• the shape of the section may still be different; you can also remove the tilt.
• the perforations in the first row are of circular section. However, there are perforations 17 with a first section and perforations 17 'with a second section of larger diameter.
• the perforations 17 are grouped here by 5 with a first spacing therebetween. Between these groups, the perforations 17 'have been arranged here, two in number.
• the second row comprises perforations 27 with a section, here, identical to the first. They are aligned in the direction of travel (which is perpendicular to the rows) with the perforations 17.
• Two perforations 27 ' are arranged in alignment with a perforation 17'. This arrangement makes it possible to make streaks on several levels: a first level is obtained by the jets of the perforations 17 and 27 aligned, a second level obtained by the alignment of the jets from the perforations 17 'and 27', and a third level is obtained by a 17 'hole only.
• FIG. 8 shows 2 rows. Compared to the direction of travel, the layout is reversed when compared to the layout in Figure 4.
• the largest perforations are at the front.
• FIG. 9 shows an example of a strip with three rows, 19, 29 and 39.
• the sections of the perforations 19 are the largest; the perforations of the second row 29 have an intermediate dimension between that of the perforations 19 and 39 of the third row. It can therefore be seen that the process makes it possible to produce sheets of cotton or other striated cellulosic fibers, the profile of which can be varied.
• FIG. 10 shows an injector, the strip of which has orifices distributed in two rows: a first row of orifices 110 with a diameter of 140 ⁇ m and a second row of orifices 210 of oval shape with a large diameter of 700 ⁇ m.
• the holes are shown in enlargement with respect to their spacing.
• the repeating pattern here consists of five holes 110 with a diameter of 140 ⁇ m, spaced from each other by 4.8 mm and an oval hole. The distance between the center of the oval hole 210 and that of the adjacent hole 110 is 7.2 mm. This pattern repeats over the entire width of the injector.
• the thickness EP of the sheet is the measurement of a stack of 20 formats cut from the sheet with the application of a pressure of 2.25 g / cm 2 .
• the bulking G or thickness potential corresponds to the increase in height of the stack of formats when the above pressure is removed.
• the depth of the grooves was measured using the following method:
• a sample is placed under a 3 CCD digital camera, ensuring that it is well level and well centered.
• the image is acquired and processed in the determined area of interest by combining the Gray code and phase shift techniques. Automatic masking removes points with poor contrast or with ambiguities.
• software, Toposurf for example, we analyze the image obtained and we create a profile of its relief. The relief is measured on the curve obtained.
• a curve as shown in FIG. 10A is obtained with the distance along the profile on the abscissa in mm, and the height on the ordinate in ⁇ m.
• the area measured is cut into segments here from A to F.
• Each of the segments frames a bell profile with a peak between two grooves.
• the spacing between the grooves corresponds to that of the orifices provided on the strip of the injector used, which can easily be checked.
• the height of the peak is determined relative to each of the two low points. Two heights of the same peak are therefore obtained respectively with respect to the low level of the two lateral grooves.
• the average value of the two values is determined.
• the value used is the maximum of the values measured on their highest side. In the present case, there is only one deep groove in the measured area between C and D.
• a value is obtained for each of the segments.
• the energy EN in 10 "3 kWh / m 2 ) applied to the sheet can be determined.
• a control sheet T was also produced with an injector having only one kind of regularly spaced orifices according to the prior art.
• the thickness of the sheet is greater (63-66 mm compared to 58 mm) and the swelling improved (6 compared to 4).
• first grooves are the grooves defined by the segments A, B, C; D, E, F and the second groove is formed between segments C and D.
• FIG. 11 another test arrangement is shown.
• This pattern comprises, on a first row, a first group of five circular orifices 111 of diameters 140 ⁇ m spaced 1.2 mm apart, and, on a second row, a second group of three circular orifices of diameter 200 ⁇ m.
• the spacing between the orifices 211 is 2.4 mm.
• the second group is at a distance of 4.8 mm from the first group on both sides. This pattern repeats throughout the strip.
• first surface grooves of depth Hs whose value is determined from the sides of the segments [C, D, E, F , K, L, M, N].
• second deep grooves between segments A and B, G and H, and I and J [A, B, G, H; I, J]
• the depth Hp value is determined from the values measured respectively on the right flanks of A, left flank of B, right flank of G and left flank of J. [A, B; G, J].
• Third grooves of depth Hm whose value is determined from the segments H and I [H, I].
• a pattern is provided for example with a group of five first orifices 111 1 mm apart and a group of three second orifices 4 mm apart.
• FIG. 12 shows the pattern of the injector orifices chosen for a third test.
• the injector has
• a group of four circular orifices 112 diameter 140 ⁇ m, spacing 2 mm;
• a group of three circular orifices 212 diameter 180 ⁇ m, spacing 3 mm;
• a single circular opening 312 diameter 200 ⁇ m, spacing 6 mm.
• FIG. 12A The profile of the relief, in a cross section to the direction of the grooves, determined by the measurements carried out is shown in FIG. 12A.
• first, superficial grooves defined by the segments [G on the right, H, I, J]
• second, deep groove defined by the right flank of C
• third grooves of medium or intermediate depth, defined by the sides of segments E, F, and the left side of G
• FIG. 13 shows the injector pattern for a fourth test.
• the injector has
• a group of four circular orifices 113 diameter 140 ⁇ m, spacing 1.2 mm;
• a group of two circular holes 213 diameter
• a single third circular opening 313 diameter 200 ⁇ m, spacing 4.8 mm.
• the profile determined by the measurements carried out is shown in FIG. 13 A. a distinction is made between the segments referenced from A to N with first surface grooves defined by the segments [C, D, E, J, K, L], three second grooves deep [left flank of A; between G and H; and right flank of N] and of the third middle grooves defined by the segments [B, F, I, M].
• the grooves are for example rectilinear but they can also be at least partly broken, wavy, sinusoidal in particular or even interrupted.
• a group of five or four orifices 113 (140 ⁇ m) spaced 1.2 mm each is provided, a group of two orifices 213 (180 ⁇ m) with a spacing of 3.6 mm and a third orifice 313 (200 ⁇ m) also 3.6 mm apart.
• FIG. 14 shows another variant of the pattern for distributing orifices on the same injector strip.
• the pattern successively comprises on a row a group of three orifices 114 (140 ⁇ m) spaced 1 mm apart, on another row a group of two orifices 214 (180 ⁇ m) with a spacing of 3 mm and on another row still a single orifice 314 (200 ⁇ m) with a spacing of 3 mm with the orifices 214 and 4 mm with the orifices 114.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Nonwoven Fabrics (AREA)
• Absorbent Articles And Supports Therefor (AREA)

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• 2003
  • 2003-06-18 FR FR0307349A patent/FR2856414B1/fr not_active Expired - Fee Related
• 2004
  • 2004-06-17 US US10/560,543 patent/US7467445B2/en not_active Expired - Fee Related
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  • 2004-06-17 WO PCT/FR2004/001510 patent/WO2004113602A1/fr active Application Filing
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