US20130012899A1 - Highly flexible absorbent laminate and method for the production thereof - Google Patents

Highly flexible absorbent laminate and method for the production thereof Download PDF

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Publication number
US20130012899A1
US20130012899A1 US13/636,457 US201113636457A US2013012899A1 US 20130012899 A1 US20130012899 A1 US 20130012899A1 US 201113636457 A US201113636457 A US 201113636457A US 2013012899 A1 US2013012899 A1 US 2013012899A1
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Prior art keywords
elastic
core
sheeting
superabsorbent
outer layer
Prior art date
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Abandoned
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US13/636,457
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English (en)
Inventor
Wilfried Fenske
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Evonik Industries AG
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Filing date
Publication date
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Assigned to EVONIK INDUSTRIES AG reassignment EVONIK INDUSTRIES AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FENSKE, WILFRIED
Publication of US20130012899A1 publication Critical patent/US20130012899A1/en
Assigned to EVONIK DEGUSSA GMBH reassignment EVONIK DEGUSSA GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EVONIK INDUSTRIES AG
Abandoned legal-status Critical Current

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    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530868—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530868—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer
    • A61F2013/530875—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer having holes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530868—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer
    • A61F2013/53089—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer having impervious part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530868—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer
    • A61F2013/530897—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the liquid distribution or transport means other than wicking layer having capillary means, e.g. pore or fibre size gradient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F2013/53445—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad from several sheets
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    • B32B2307/00—Properties of the layers or laminate
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    • B32B2307/00—Properties of the layers or laminate
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
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    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0076—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised in that the layers are not bonded on the totality of their surfaces
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B32B37/1292—Application of adhesive selectively, e.g. in stripes, in patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0032—Ancillary operations in connection with laminating processes increasing porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24025—Superposed movable attached layers or components

Definitions

  • Textile absorbent materials capable of expanding in one coordinate direction at least to create room for the increased volume due to imbibition of liquid to be absorbed are more particularly needed in connection with disposable articles such as baby diapers, incontinence products and femcare hygiene, and also in the sector of absorbent articles for packaging and food technology.
  • This function is traditionally performed by suitable combination products comprising pulp, superabsorbent granules or fibers and liquid-distributing layers comprising synthetic nonwovens, pulp or cotton.
  • EP 724 418 describes the production of a laminate which consists of two outer plies, of which at least one ply is hydrophilic and which are glued to each other using a water-sensitive pressure-sensitive adhesive, so that isolated unglued sections can punctiformly incorporate superabsorbent which, in the swollen state, specifically breaks open the gluing and achieves the laminate volume increase needed for the swell volume. It has to be assumed that only limited integrity can be achieved for the laminate in the swollen state.
  • US 20020102392 proposes a method for producing an absorption-capable laminate with incorporated sections of superabsorbents and elastic properties. Sections of superabsorbents are positioned via a vacuum system, between two outer plies, of which one is shirred in the longitudinal direction using a profiled roller, and transversely to the manufacturing direction, to obtain a longitudinally extendable laminate, wherein the elasticity and shining can be increased by using elastic films or nonwovens.
  • US20020115969 discloses a method for the longitudinally continuous production of a laminate with individual sheetings of superabsorbents which have been installed with hot glue between two outer plies such that strips of superabsorbent-covered and superabsorbent-free regions in each case are formed transversely to the manufacturing direction.
  • Superabsorbents undergo a weight increase of 2500-5000% as they imbibe liquid.
  • the associated increase in volume has to be accommodated through suitable flexibility on the part of the surrounding carrier material. This is in principle not a problem in the case of conventional pulp/superabsorbent pads, since the pulp allows expansion in all three dimensions.
  • superabsorbent laminates in which superabsorbent granules or superabsorbent/fiber mixtures are fixed using pressure-sensitive adhesive or thermally between two or more plies of nonwovens, film, tissue or the like, this function has to be made possible by the outer plies of the laminate, whether through stretching or through geometric flexibility.
  • this laminate be elastically extendable not just perpendicularly to its production plane but also within this plane itself in order not only to facilitate the volume enlargement on the part of the superabsorbent due to liquid imbibition but also to combine with other components of the above-identified hygiene articles in not impairing their flexibility and ability to conform to the particular body contour.
  • the invention accordingly has for its object to provide a production method enabling the continuous production of absorption-capable textile sheeting material with high manufacturing capacity and, as a result, cost-effectively, wherein the end product has not only area-elastic properties to optimally adapt to the body contour of the user but also volume-elastic properties to accommodate large amounts of liquid.
  • this object is achieved according to the invention by virtue of the fact that owing to the incorporation of superabsorbents and one or more elastic interplies, consisting of individual threads, strands or bands between two outer plies of a thusly produced laminate, this laminate is made extendable essentially transversely to the production direction and shirred in the relaxed state to the extent that the elastic interplies contain individual sections of superabsorbent in the manner of a quilted blanket and create room for the expansion of the laminate on fluid imbibition perpendicularly to and within the manufacturing plane.
  • the laminate thus produced is completely elastic and extendable and conforms perfectly to the body contour in both the dry and the moist state.
  • a laminate produced in this way is always permeable perpendicularly to its manufacturing plane in the region of the gluing of the elastic plies even in the swollen state without being hindered by the swelling of the superabsorbent, so that the texture of the surface and the choice of appropriate outer layer ensure transportation performance even on the skin-remote side and the skin-sided outer layer can be optimized in respect of back-wetting/skin moisture.
  • first the front end of the first outer textile layer 20 is applied to the end portion of an elongate rod- or tube-shaped core 5 and, by imposing an advancement movement around the core, folded into a shape which is closed in a hoselike form.
  • Areal pattern 32 of elastic threads or strands which surrounds the tube of the first outer sheeting of material in a cruciformly symmetrical manner has a pressure-sensitive adhesive 29 applied to it in thread form, which wets and enfolds the essentially bare elastic threads.
  • the cross section of the core is enlarged to tauten the hose of the first outer sheeting of material and thereby cause it to come into contact with the elastic threads and finally be brought into a flat shape.
  • a pair of advancement or contact rollers 38 is used to bond two individual sheets of the second outer material layer 32 onto the free surface of the first outer material sheeting 20 and the elastic threads 17 provided with the pressure-sensitive adhesive 29 .
  • a pressure-sensitive adhesive applied spirally or meanderingly is forced through the areal pattern of the elastic threads, preferably in order that these elastic threads are enfolded and are oriented essentially around the threads after spreading apart of the hose of the first outer sheeting of material, as a result of which a glue pattern which corresponds to the areal pattern 32 ( FIG. 4 ) is produced, which owing to the enfolding of the elastic threads bonds these adheringly not only to the first but also to the second outer sheeting of material in the further course of the advancement movement on the core.
  • the first outer material layer once it has been pressed into the storage struts, can easily be maintained by negative pressure, introduction of compressed air or by electrostatic charging in a position closely bearing against the guiding and storage struts of the core, and be pulled with low friction over the core.
  • the core 5 for this process is disposed to be perpendicular in its longitudinal direction such that the advancement rolls 56 are situated at the lower end of core 5 ( FIG. 1 ).
  • the superabsorbent 47 is advantageously supplied in separate volumetrically or weight-dosed continuous individual lines or tracks which are either introduced into the glue-free regions of the areal pattern in an intermittent manner by pulsating compressed air or pistons, or are intermittently deflected in line with the areal pattern 32 in a direction transversely to the centrifugal direction of the hose of the first outer sheeting of material.
  • it can be sufficient to allow these individual tracks to trickle down continuously, in which case it is advantageous to supply two individual tracks per cassette of the areal pattern.
  • the hose of the first outer material sheeting 20 may be relaxed in the transverse direction by reducing the width of the guiding struts before being supplied into the tensile rolls 56 , so that it has a slight degree of waviness at the time the second outer sheeting 44 is supplied, as a result of which small pockets are formed in the region of the nonglued zones of areal pattern 26 , which facilitate the laydown of superabsorbent 33 .
  • this waviness can be suitably policed to control the ratio of the widths of the first and second outer sheetings of material relative to each other to the extent that the laminate thus produced has a higher degree of waviness on the side of the first outer layer than on the side of the second outer layer.
  • FIG. 1 shows a highly schematicized depiction of the side view of the essential functional elements of a device which can be used to carry out the method according to the invention
  • FIG. 2 a shows the construction of the core comprising guiding and storage struts
  • FIG. 2 b shows the construction of the core comprising guiding and storage struts and guiding rails in the region of the tapering of the core;
  • FIG. 2 c shows the construction of the core in the region of the spreading apart of the core
  • FIG. 2 d shows the construction of the core after spreading apart is complete
  • FIG. 3 shows the arrangement of individual guides in one of the feed means provided in the device as per FIGS. 1 and 2 for applying groups of untensioned or lightly tensioned threads or strands;
  • FIG. 4 shows the areal pattern, obtained on using two oppositely driven feed means as per FIG. 3 , of elastic threads or strands and of applied pressure-sensitive adhesive in a sheeting material produced in the manner of the invention
  • FIG. 5 a shows the areal pattern, obtained on using two oppositely driven feed means as per FIG. 3 , of elastic threads or strands and of punctiformly supplied pulverulent filler material in a sheeting material produced in the manner of the invention
  • FIG. 5 b shows the areal pattern, obtained on using two oppositely driven feed means as per FIG. 3 , as elastic threads or strands and of pulverulent filler material supplied continuously in discrete individual lines in a sheeting material produced in the manner of the invention;
  • FIG. 5 c shows the areal pattern, obtained on using two oppositely driven feed means as per FIG. 3 , as elastic threads or strands and of pulverulent filler material supplied continuously in discrete individual lines, intermittently deflected transversely to the production direction in a sheeting material produced in the manner of the invention;
  • FIG. 6 shows a schematic depiction of the laminate produced according to the invention on unweighting the hose of the first sheeting of material and the incorporated elastic interplies transversely to the manufacturing direction thereof before introducing the superabsorbent and bonding to the second outer layer;
  • FIG. 7 a shows a schematic depiction of a detail from the cross section of the core on using two storage struts between respectively two guiding struts and policing the sectionwise intake of the first outer layer by positioning the guiding rails;
  • FIG. 7 b shows areal patterns of elastic threads of the elastic sheeting material produced according to FIG. 7 a , in the planar, relaxed state.
  • the device 2 depicted in a simplified and highly schematicized manner in FIG. 1 for carrying out the inventive method consists of an elongate core 5 having in this case a square cross section, which is surrounded by two feed means 11 , 14 which are spaced apart from each other in the longitudinal direction. These feed means are rotationally driven in opposite directions illustrated by the arrows a and b. Individual guides 17 for elastic threads, bands or strands are spaced apart from each other on these ring-shaped feed means in the circumferential direction in each case through which individual guides the elastic elements are withdrawn to their wound package in the axial direction, leading them in the direction of core 5 .
  • a first textile layer 20 is preferably conveyed under sheeting tension control, folded via a forming shoulder 6 into a hose of rectangular cross section and laid onto the front end of core 5 formed by multiple struts 35 , 38 in this example ( FIG. 2 a ).
  • the overlap of the first textile layer 20 is fixed here in the course of forming the hose by applying a pressure-sensitive adhesive, welding or mechanical arrest.
  • This hose thus formed is subsequently guided over the cross-sectionally tapered core, so that the hose merely guides the core on the ends of the guiding struts 35 , which shorten in their width, and inbetween material of the hose is guided using guiding rails or wires 8 in vacant spaces formed by storage struts 38 disposed between the guiding struts ( FIG. 2 b ).
  • This hose is subsequently guided by two contrarotatingly turning feed means 11 , 14 .
  • individual elastic threads, bands or strands 50 , 53 are each withdrawn by circumferentially spaced-apart individual guides 17 of stationary packages or rolls and laid down onto the hose of the first outer material layer 20 .
  • the superposition of the rotary motions of the two feed means 11 , 14 by the advancement of the first material layer 20 results in an oppositely diagonal pattern of the elastic elements 50 , 53 , which only contacts the first layer material layer on the tips of the guiding rails 35 of core 5 , but is otherwise bare, FIG. 3 .
  • the elastic threads 50 , 53 have pressure-sensitive adhesive applied to them, preferably as a curtain of spiraling or meandering threads, which on impingement on the bare oppositely diagonal pattern of elastic threads 50 , 53 is diverted by these and preferentially wets and enfolds the elastic threads, but specifically cross-over points between threads 50 and 53 , FIG. 4 .
  • the latter is spread in its cross section such that any two opposite guiding struts are expanded in their width, and a complementary pair of guiding struts is reduced in its width, to the effect that initially the material of the first layer 20 remaining in the storage struts 38 of the core 5 is continuously detached and the hose of the first material layer 20 is tensioned taut over the ends of the guiding rails 35 ( FIG. 2 c ).
  • This brings the hose of the first material sheeting 20 into sheetlike contact with the pattern of elastic elements 17 and of the pressure-sensitive adhesive applied thereto.
  • this hose thus formed into a flat shape is introduced into a device of two driven opposite advancement elements, here two rolls or rollers 56 , which supply in the last instance the advancement for withdrawing the first outer layer 20 of the material roll 26 and the transportation of all materials over the core.
  • the advancement rollers 56 provide withdrawal and feeding, preferably under sheeting tension control, of an individual sheeting each of the second outer layer 44 of two mutually spaced-apart, rotatingly driven devices of material rolls 41 , on both sides of the material sheeting 20 , and sheetlike bonding thereof to the first material layer 20 and the elastic areal pattern 32 via the pressure-sensitive adhesive 29 .
  • a superabsorbent 47 is introduced on both sides of the hose in a perpendicular manner such that, in line with the areal pattern 32 , individual lines or tracks adapted individually volumetrically or grammetrically to the advancement speed of the hose of the first material sheeting 20 are continuously trickled in, resulting in a product pattern as per FIG. 5 b ; alternatively these tracks are mechanically or pneumatically deflected transversely to the flow direction in accordance with areal pattern 32 in an intermittent or oscillating manner (product pattern as per FIG.
  • this multi-ply hose thus formed is severed longitudinally into individual sheetings in the course of the continued advancement movement, which sheetings can selectively be transversingly wound up on rolls movement or deposited in boxes or coiled up.
  • the width of the flat hose comprising a first textile layer 20 and areal pattern of elastic elements 32 having been spread apart into the flat state, FIG. 2 d , can be relaxed and shirred by reducing the width of the guiding rails 35 such that bonding to the otherwise essentially flat second outer layer 44 produces an elastic, absorption-capable sheeting material which has on the outside surface formed by the first textile layer a higher degree of shirring than the side formed by the second outer layer, FIG. 6 .
  • FIG. 7 a illustrates, by way of example, how in this case of two storage struts 38 per guiding strut pair 38 , by means of suitably disposing the guiding rails 8 in the respectively formed-out storage sections of core 5 in the transverse direction to the advancement direction, differing sheeting widths of the excess sheeting material of the first outer layer 20 due to the tapering of the core 5 are introduced.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
US13/636,457 2010-03-28 2011-03-27 Highly flexible absorbent laminate and method for the production thereof Abandoned US20130012899A1 (en)

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DE102010013288A DE102010013288A1 (de) 2010-03-29 2010-03-29 Hochflexibles absorbierendes Laminat und Verfahren zu dessen Herstellung
DE102010013288.8 2010-03-29
PCT/DE2011/000339 WO2011120504A2 (de) 2010-03-28 2011-03-27 Hochflexibles absorbierendes laminat und verfahren zu dessen herstellung

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US10391195B2 (en) 2011-11-17 2019-08-27 Evonik Degussa Gmbh Super-absorbing polymers with rapid absorption properties and method for producing the same
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US11001692B2 (en) 2013-05-15 2021-05-11 Evonik Operations Gmbh Superabsorbent polymers with rapid absorption properties and process for producing same
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US11925538B2 (en) 2019-01-07 2024-03-12 Curt G. Joa, Inc. Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product

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US20140052089A1 (en) * 2011-04-28 2014-02-20 Evonik Industries Ag Elastic absorbent sanitary article for absorbing bodily fluids
US9439814B2 (en) * 2011-04-28 2016-09-13 Evonik Degussa Gmbh Elastic absorbent sanitary article for absorbing bodily fluids
US10391195B2 (en) 2011-11-17 2019-08-27 Evonik Degussa Gmbh Super-absorbing polymers with rapid absorption properties and method for producing the same
US9555148B2 (en) 2011-11-17 2017-01-31 Evonik Degussa Gmbh Superabsorbing polymers with rapid absorption properties and method for producing the same
US20140155853A1 (en) * 2012-11-09 2014-06-05 Curt G. Joa, Inc. Apparatus and methods for forming laminates containing additive matter
US10307732B2 (en) 2013-04-10 2019-06-04 Evonik Corporation Particulate superabsorbent polymer composition having improved stability and fast absorption
US11001692B2 (en) 2013-05-15 2021-05-11 Evonik Operations Gmbh Superabsorbent polymers with rapid absorption properties and process for producing same
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US20190314221A1 (en) * 2014-07-30 2019-10-17 Curt G. Joa, Inc. Pulpless absorbent core and method of core forming
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BR112012024883A2 (pt) 2018-11-06
US9056033B2 (en) 2015-06-16
RU2012145725A (ru) 2014-05-10
MY157421A (en) 2016-06-15
EP2552372B1 (de) 2021-05-12
CN102883694A (zh) 2013-01-16
WO2011120504A2 (de) 2011-10-06
CN102883694B (zh) 2014-06-25
JP2013528507A (ja) 2013-07-11
EP2553156A2 (de) 2013-02-06
ZA201207294B (en) 2013-06-26
DE112011101087A5 (de) 2013-04-11
AU2011234939A1 (en) 2012-10-18
MX2012011297A (es) 2013-02-15
KR20130009797A (ko) 2013-01-23
CN102883695A (zh) 2013-01-16
EP2552372A2 (de) 2013-02-06
BR112012024893A2 (pt) 2017-10-03
MY158445A (en) 2016-10-14
WO2011141009A3 (de) 2012-03-01
CA2794761A1 (en) 2011-11-17
WO2011120504A3 (de) 2012-03-01
ZA201207296B (en) 2013-06-26
JP5917485B2 (ja) 2016-05-18
MX2012011209A (es) 2012-12-17
KR20130061125A (ko) 2013-06-10
JP2013528408A (ja) 2013-07-11
AU2011252511A1 (en) 2012-10-25
DE102010013288A1 (de) 2011-09-29
MA34177B1 (fr) 2013-04-03
JP5967074B2 (ja) 2016-08-10
CA2794767A1 (en) 2011-10-06
AU2011234939B2 (en) 2015-04-16
EP2553156B1 (de) 2021-12-08
US20130011601A1 (en) 2013-01-10
WO2011141009A2 (de) 2011-11-17
AU2011252511B2 (en) 2013-11-28
RU2012145726A (ru) 2014-05-10
DE112011101100A5 (de) 2013-04-04

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