EP0211131A2 - Nichtgewebter, textiler Saugkörper für Medizin und Hygiene sowie Verfahren zu seiner Herstellung - Google Patents

Nichtgewebter, textiler Saugkörper für Medizin und Hygiene sowie Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0211131A2
EP0211131A2 EP86100057A EP86100057A EP0211131A2 EP 0211131 A2 EP0211131 A2 EP 0211131A2 EP 86100057 A EP86100057 A EP 86100057A EP 86100057 A EP86100057 A EP 86100057A EP 0211131 A2 EP0211131 A2 EP 0211131A2
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EP
European Patent Office
Prior art keywords
absorbent
absorbent body
fibers
fiber
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86100057A
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German (de)
English (en)
French (fr)
Inventor
Dieter Dr. Groitzsch
Hans-Jürgen Kühlwein
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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Filing date
Publication date
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0211131A2 publication Critical patent/EP0211131A2/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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
    • 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
    • D04H1/495—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 for formation of patterns, e.g. drilling or rearrangement
    • 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
    • D04H1/498—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 entanglement of layered webs
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • 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.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/69—Autogenously bonded nonwoven fabric
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]

Definitions

  • the invention relates to a nonwoven, textile absorbent body for use in the medical and / or hygienic field according to the preamble of claim 1. Furthermore, a method for producing such an absorbent body is shown.
  • unfolded compresses or the absorbent layer of wound dressings are covered with hydrophobic synthetic fiber layers made of fabric.
  • EP-OS 77 034 describes an absorbent wound dressing made of a core of highly absorbent material with an at least two-layer covering on the wound side, the core-side layer of which consists of heat-sealable nonwoven fabric and the outer layer of which is made of polypropylene fabric with a lattice structure.
  • This fabric which is not a nonwoven fabric, is intended to facilitate the removal of wound exudate into the absorbent layers due to its sufficiently large openings, irregularly edged in comparison to perforated polypropylene foils, without clogging of the pores.
  • the heat-sealable non-woven fabric connecting the outer lattice layer to the absorbent layer is thus brought very close to the wound.
  • the edges of the two-layer cover can be welded into a suction pad.
  • Covers with non-weldable cover fleeces are forbidden because of the polymer binder dispersions then required and their content of washable additives that are not physiologically acceptable in medicine.
  • the French patent application FR-A 2 536 432 shows a hydraulic perforation device and a method with which perforated, binder-free nonwovens can be produced predominantly from cellulose fibers with abrasion-resistant surfaces, the fibers being intertwined by needling with water jets of very high pressure. Compared to cotton gauze, these products are characterized by their approximately 50% higher absorption capacity for aqueous liquids.
  • the object of the present invention is to provide a non-woven textile absorbent body which is particularly versatile in medicine, but also in the hygiene field, the absorbency of which corresponds to that of the perforated cellulose / cotton nonwovens, but which does not contain any binding agents and is nevertheless lint-free and friction-resistant also not glued to the wound and which allows multiple folds as required without damage.
  • the advantages of known medical absorbent bodies that have not previously been achievable together should therefore be combined in one product.
  • the task is to demonstrate a cost-effective and simple method for producing such an absorbent body, with which the technical outlay of water jet needling and the use of a two-layered one.
  • Nonwoven / fabric cover can be bypassed and yet no binding agent is required for consolidation.
  • the hydrophobic outer layer according to the invention contains each min- de least 80tl synthetic composite filaments having a high- and a low-melting component.
  • the remaining fibers can be synthetic homofil fibers, possibly with a small proportion of cellulosic fibers.
  • the absorbent fiber layer generally consists of the known cellulosic fiber materials, optionally in a mixture with other fibers. It is advisable to add strengthening binding fibers. In the interest of cost-effective production and to maintain the bulkiness of the suction zone, a content of up to 30% of composite filaments of the same type as in the hydrophobic cover is advantageous. These binding fibers also serve to connect the suction zone to the outer layer (s).
  • the absorbent zone contains together with cellulosic fibers or consists entirely of polyvinyl alcohol fibers softenable in hot water.
  • This configuration has the advantages that binding fibers can be dispensed with, since they are self-adhesive under the conditions mentioned, and that they also have a significantly higher absorption capacity for aqueous liquids than cellulosic fibers.
  • the suction zone consists only of cellulose paper, expediently in several layers. This version is preferred for hygienic applications. Pulp is inexpensive and has such a strong internal cohesion that it can also be dispensed with with binder fiber additives, even when subjected to heavy use when dry.
  • the absorbent body according to the invention has continuous perforations distributed over its entire surface. However, according to the invention, even in the perforated areas, it does not contain any essential fiber entanglements that contribute to strengthening.
  • the composite is thermally bonded exclusively via the low-melting component of the composite fibers; its hydrophobic outside or outside has a lint-free structure.
  • the weight of the finished material is expediently in a range between 30 and 50 g / m 2 , the weight fraction of the hydrophobic outer layer or layers being intended to be as low as possible in the interest of foldability and absorbency, for example 6 g / m 2 in each case with a fiber titer of 1.7 dtex.
  • the non-absorbent surface of the absorbent body can be rough or smooth; the former property is more suitable for wound cleaning products, the latter is more suitable for wound dressings (as little bondability to the wound as possible).
  • At least one fiber layer contains shrunk polyester fibers. These bring about a mechanical consolidation of the non-perforated zones both in and perpendicular to the fiber planes, the extent and the direction of this consolidation being easily varied by the number of shrink fibers and by the fiber orientation.
  • Such absorbent bodies are distinguished by an increased fluid absorption capacity because of their increased bulk, in particular after repeated folding.
  • the product according to the invention can be used in a variety of ways both in the medical and in the hygienic field. It has an absorbency that is at least equal to that of the well-known perforated layered nonwovens, but does not contain any binder additives and is nevertheless lint-free and very tear-resistant.
  • the openings of the cover formed by the welded component fibers are irregular and large enough to ensure reliable secretion transport to the suction layer. It is therefore achieved with this completely non-woven absorbent body as with the known two-layer fleece / fabric covers without having to provide such a fabric.
  • the absorbent body can be folded multiple times without damage and in this state can easily be thermally sealed to a very voluminous absorbent body, and because of the content of thermoplastic fibers in the outer layers, it can be welded along its edges, in the case of a two-layer design after folding once, to a suction pad, on the sides of which an undesirable fiber leakage from the absorbent layer is thus reliably excluded.
  • the claimed process for the production of the absorbent body according to the invention consists first of all in depositing at least two fiber layers on top of one another, one of which contains the known absorbent fibers and the other contains hydrophobic, thermoplastic composite filaments. At least 80% of composite filaments are used for the outer hydrophobic layer or layers. The fiber scrim is then exposed to thin water streams of such low energy that there is no substantial fiber entanglement, but only hydraulic perforation.
  • Hydraulic perforation with low-energy water jets requires additional consolidation, since this alone does not result in fiber entanglement and no abrasion-resistant surface.
  • this method is used without the use of a binder, since multicomponent fibers alone bring about the strengthening.
  • the "water curtain” that forms strikes a perforated, rotating template that moves with the fiber layers, the fibrous web underneath being perforated by the water that passes through without substantial fiber entanglement according to the perforated structure of the template.
  • the open area of the perforated template is expediently chosen to be as large as possible because this makes the longitudinal and transverse webs of the perforated fleece highly voluminous and thus creates further liquid-absorbing capillary spaces in the finished absorbent body.
  • these voluminous "webs” increase the abrasiveness of the surface, which is particularly advantageous for 4-year cleaning and cosmetic applications.
  • the water is removed by drying, the sheet is thermally solidified at a temperature above the melting point of the low-melting component of the composite filaments and, if necessary, the hydrophobic surfaces are subsequently smoothed.
  • Both core-sheath and conjugated (side-by-side) fibers can be used as composite filaments.
  • the outer surfaces of the dried and solidified absorbent body consisting of composite filaments can be thermally smoothed using the known calendering process. If you want to leave the volume of the product relatively large, two smooth rollers, ie. H. with a relatively low pressure, smoothed. By changing the roller gap, the volume of the absorbent body can be varied as desired.
  • one or more fiber layers are blended with polyester fibers that are highly shrinkable in hot water or steam.
  • the perforated, still wet fabric shrinks. This involves mechanical strengthening by compressing the fiber bundles along the longitudinal and transverse webs and partly by reorienting the fibers into the vertical. The amount of shrinkage in the longitudinal and transverse directions depends primarily on the fiber orientation and the shrinkage fiber content.
  • the fiber is consolidated again by exceeding the melting temperature of the lower-melting component of the heterofil fibers. The aforementioned reorientation of the fibers is associated with an increase in volume which, after one or more folds, is particularly noticeable due to an increased fluid absorption capacity.
  • fiber webs are usually laid lengthways.
  • the associated very low transverse strengths can be increased as required in a simple manner by stacking each layer at right angles to the next lower one. Such an arrangement is particularly advantageous for absorbent bodies in the operating theater where high tear resistance is required.
  • the low-melting component should expediently be activated at a temperature which the absorbent fibers can survive without damage.
  • Such composite filaments consist, for example, of polyethylene terephthalate / polyethylene (or polypropylene).
  • the fiber with the polypropylene component is also resistant to steam sterilization; this configuration is therefore preferable for folding compresses to be sterilized in the autoclave.
  • the titer of all fibers should be as low as possible, i.e. they should have the lowest possible stiffness.
  • the method according to the invention permits the continuous, inexpensive and rapid production of highly effective textile absorbent bodies. It is essential that the hydraulic perforation is carried out in principle according to FR-A 2 536 432, but according to the invention with a low-energy "water curtain". This measure, together with a binder-free consolidation, satisfies all the requirements specified in the task for a textile composite that can be used for medicine and hygiene.
  • a three-layer stacked nonwoven fabric is made from several cards: the two outer layers each consist of 7 g / m 2 of a polyester / polyethylene bicomponent fiber with a titer of 1.7 dtex and a cutting length of 40 mm, the absorbent middle layer of 26 g / m 2 of a blend made of 80% viscose cellulose with a titer of 1.3 dtex and a cutting length of 40 mm and 20% of the above-mentioned composite filaments.
  • the staple fiber composite with a total weight of 40 g / m is wetted by spraying with water before the hydraulic perforation.
  • the perforated template used contains rectangular perforations with dimensions of 1.4 mm across and 2.5 mm along the direction of travel.
  • the web widths are 0.50 mm throughout.
  • the open area therefore amounts to 55%, based on the entire stencil surface.
  • the thin water curtain (approx. 60 ⁇ m) from a slot nozzle applies approximately 10 bar to the template. After perforation, the air is dried at 160 ° C. and solidified. The result is a voluminous, highly absorbent and yet abrasion-resistant medical absorbent. Both in the folded and unfolded state it has a significantly higher water absorption than cotton gauze or commercially available, water-jet needled products.
  • FIG. 1 illustrates how, in the case of an absorbent body according to Example 1, the hydraulic perforation with water jets of low energy causes perforation without much higher fiber entanglement in the perforated area than is already the case in the non-perforated zones.
  • FIG. 2 a cross section through the absorbent body according to Example 1, clearly shows that after the deposition, perforation and consolidation of the nonwoven composite, this no longer constitutes a pure laminate, since the upper or lower (hydrophobic) fiber layers partially penetrate or wrap around the absorbent middle layer .
  • the absorbent body manufactured according to Example 1 is smoothed on one side at 105 ° C. against a smooth, PTFE-coated fabric. The result is an absolutely lint-free, smooth surface.
  • the material is superior in terms of non-wound adhesive folded gauze and gauze substitute based on water jet needled nonwoven.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Materials For Medical Uses (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Medicinal Preparation (AREA)
EP86100057A 1985-08-08 1986-01-03 Nichtgewebter, textiler Saugkörper für Medizin und Hygiene sowie Verfahren zu seiner Herstellung Withdrawn EP0211131A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853528524 DE3528524A1 (de) 1985-08-08 1985-08-08 Nichtgewebter, textiler saugkoerper fuer medizin und hygiene sowie verfahren zu seiner herstellung
DE3528524 1985-08-08

Publications (1)

Publication Number Publication Date
EP0211131A2 true EP0211131A2 (de) 1987-02-25

Family

ID=6278066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100057A Withdrawn EP0211131A2 (de) 1985-08-08 1986-01-03 Nichtgewebter, textiler Saugkörper für Medizin und Hygiene sowie Verfahren zu seiner Herstellung

Country Status (6)

Country Link
US (1) US4731277A (no)
EP (1) EP0211131A2 (no)
JP (1) JPS6241658A (no)
DE (1) DE3528524A1 (no)
ES (1) ES8702132A1 (no)
NO (1) NO860182L (no)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418493A1 (en) * 1989-07-28 1991-03-27 Fiberweb North America, Inc. A nonwoven composite fabric combined by hydroentangling and a method of manufacturing the same
WO2021018544A1 (de) * 2019-07-31 2021-02-04 Carl Freudenberg Kg Wundreinigungsartikel

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2554354B2 (ja) * 1988-02-23 1996-11-13 ユニ・チャーム株式会社 吸収材の製造方法
US5229184A (en) * 1988-04-14 1993-07-20 Albany International Corporation Heat shrinkable fibres and products therefrom
DE4036208A1 (de) * 1990-11-14 1992-05-21 Vostra Medicalprodukte Vertrie Medizinisches saugtuch
US5679190A (en) * 1992-02-03 1997-10-21 Minnesota Mining And Manufacturing Company Method of making nonwoven sheet materials, tapes
US5496603A (en) * 1992-02-03 1996-03-05 Minnesota Mining And Manufacturing Company Nonwoven sheet materials, tapes and methods
US5631073A (en) * 1992-02-03 1997-05-20 Minnesota Mining And Manufacturing Company Nonwoven sheet materials, tapes and methods
US5263629A (en) * 1992-06-29 1993-11-23 Ethicon, Inc. Method and apparatus for achieving hemostasis along a staple line
US5382400A (en) * 1992-08-21 1995-01-17 Kimberly-Clark Corporation Nonwoven multicomponent polymeric fabric and method for making same
US5405682A (en) * 1992-08-26 1995-04-11 Kimberly Clark Corporation Nonwoven fabric made with multicomponent polymeric strands including a blend of polyolefin and elastomeric thermoplastic material
US5336552A (en) * 1992-08-26 1994-08-09 Kimberly-Clark Corporation Nonwoven fabric made with multicomponent polymeric strands including a blend of polyolefin and ethylene alkyl acrylate copolymer
CA2092604A1 (en) * 1992-11-12 1994-05-13 Richard Swee-Chye Yeo Hydrophilic, multicomponent polymeric strands and nonwoven fabrics made therewith
US5482772A (en) 1992-12-28 1996-01-09 Kimberly-Clark Corporation Polymeric strands including a propylene polymer composition and nonwoven fabric and articles made therewith
US5770532A (en) * 1996-01-11 1998-06-23 Hitachi, Ltd. Method for manufacturing a solidified fiber fleece, the resulting solidified fiber fleece, and use of this fleece
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WO2021018544A1 (de) * 2019-07-31 2021-02-04 Carl Freudenberg Kg Wundreinigungsartikel

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ES8702132A1 (es) 1987-01-01
DE3528524A1 (de) 1987-02-12
JPS6241658A (ja) 1987-02-23
NO860182L (no) 1987-02-09
ES551794A0 (es) 1987-01-01
US4731277A (en) 1988-03-15

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