Classifications

• • 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
• • A—HUMAN NECESSITIES
  • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
  • A22C—PROCESSING MEAT, POULTRY, OR FISH
  • A22C13/00—Sausage casings
  • A22C13/0013—Chemical composition of synthetic sausage casings
  • A22C13/0016—Chemical composition of synthetic sausage casings based on proteins, e.g. collagen
• • 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
  • A61F13/01—Non-adhesive bandages or dressings
  • A61F13/01008—Non-adhesive bandages or dressings characterised by the material
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
  • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
  • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
  • A61L15/32—Proteins, polypeptides; Degradation products or derivatives thereof, e.g. albumin, collagen, fibrin, gelatin
  • A61L15/325—Collagen
• • 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
  • B32B1/00—Layered products having a non-planar shape
  • B32B1/08—Tubular products
• • 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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
  • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• • 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
  • B32B5/022—Non-woven fabric
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
  • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
  • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
• • 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
  • D04H1/4282—Addition polymers
  • D04H1/4291—Olefin 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
  • D04H1/4326—Condensation or reaction polymers
  • D04H1/4334—Polyamides
• • 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
  • D04H1/58—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
  • D04H1/587—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
  • D21F11/14—Making cellulose wadding, filter or blotting paper
• • 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
  • A61F2013/00361—Plasters
  • A61F2013/00727—Plasters means for wound humidity control
  • A61F2013/00731—Plasters means for wound humidity control with absorbing pads
  • A61F2013/00744—Plasters means for wound humidity control with absorbing pads containing non-woven
• • 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
  • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
  • B32B2262/02—Synthetic macromolecular fibres
  • B32B2262/0253—Polyolefin fibres
• • 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
  • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
  • B32B2262/06—Vegetal fibres
  • B32B2262/062—Cellulose fibres, e.g. cotton
• • 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
  • B32B2305/00—Condition, form or state of the layers or laminate
  • B32B2305/10—Fibres of continuous length
  • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
• • 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
  • B32B2439/00—Containers; Receptacles
  • B32B2439/70—Food packaging
• • 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
  • B32B2597/00—Tubular articles, e.g. hoses, pipes
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31935—Ester, halide or nitrile of addition polymer
• • 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.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
  • Y10T442/277—Coated or impregnated cellulosic fiber fabric
  • Y10T442/2787—Coating or impregnation contains a vinyl polymer or copolymer

Definitions

• the tube By coating the low-collagen surface with plastic such as polyvinylidene chloride and forming a tube with the high-collagen surface inside, the tube will conform closely to sausage material filling even if the latter shrinks, so as to maintain a pleasing appearance; the plastic exterior, however, keeps the product impervious to water vapor and air.
• plastic such as polyvinylidene chloride
• the present invention relates to bonded non-woven fabrics especially suited for wound dressings, sausage casings, and the like.
• a bandage for a wound should fulfill the following requirements:
• a fibrous mat is bonded with collagen, the concentration of the collagen decreasing from a maximum value adjacent one surface.
• the concentration may reach a minimum at the other surface or in the interior of the mat, increasing again toward the other surface. This is in contrast with the prior art non-Wovens wherein every effort was made to distribute the collagen binder uniformly throughout.
• a fiber mixture of, for example, equal parts of staple rayon fiber and wood pulp is suspended in a great excess of water.
• the water contains collagen United States Patent 0 "ice fiber slurry.
• This mixture is then floated onto a slanting screen.
• a fiber mat mixture is then left on the screen and contains from about 5 to 10% collagen, depending on the amount of collagen used.
• At the upper end of the slanting screen there is another tank containing a collagen dispersion. This dispersion is then allowed to run into the screen below it, the collagen concentrating at the surface of the already collagen-doped mat. The excess water is removed by vacuum in the usual manner.
• the wet mat is dried by passing it through a drying chamber or over a drying cylinder, whereupon the material solidifies.
• the collagen present in the mat must be tanned. This is performed most simply by spraying the collagenhardened fiber mat with an aqueous solution containing aldehydes, preferably glutaric aldehyde. The aldehyde then tans the collagen.
• aldehydes preferably glutaric aldehyde. The aldehyde then tans the collagen.
• thermoplastic powder such as polyvinyl acetate, for example, are added to the suspension of the textile and collagen fibers in an excess of water (up to 10% of the total weight of the final product).
• thermoplastic powder present in the two outer layers softens, resulting in a strong bonding together of all three layers.
• a so-called surgical pad is obtained which is gentle to wounds on account of the high collagen content, and which, due to the absorbent material inserted between the covers, is also capable of absorbing large amounts of the secretions from the wound.
• thermoplastic fibers can be included in the mix from which the initial non-woven mat is prepared.
• heat sealing or activation can be effected peripherally to form a pad with the absorbent fibrous layer completely enclosed or it may be made along predetermined lines, continuous or discontinuous, the bond extending through the fibrous layer to secure it to both outer fabrics.
• polypropylene fibers to the outer layers instead of viscose fibers, since they are thermoplastics and are not wetted by aqueous liquids.
• any fibers, natural or synthetic may be used, e.g. nylon, silk waste, polyester, acrylics, polyethylene, acetate, cotton, and the like.
• the fibers may be present in short staple form or in substantially continuously lengths.
• the deniers may be any of those normally encountered, e.g. as little as about 1 up to about 50 or more, although advantageously the denier ranges from about 2 to 25 and preferably about 2 to 15.
• the material of the invention can also be used for other applications.
• the lowcollagen side is coated with a film of plastic such as polyvinylidene chloride
• this material is suitable for the packing of sausage meat and for use as artificial casing.
• the high-collagen side can both swell and shrink, thereby assuring tight contact with the stuffing.
• the polyvinylidene chloride adheres very well to the lowcollagen side. If it should be applied to the high-collagen side it would come loose from it.
• Polyvinylidene chloride is completely impervious to water vapor and air, which is essential for many applications. Sausage meat can also be packed in plain sheet polyvinylidene chloride, but if this material is used to make an artificial casing, it will adhere very poorly to the stuffing, and wrinkles and creases form detracting from the appearance of the product.
• plastic films may be similarly applied and employed and may form secure bonds with the underlying mat as a result of their affinity for the fibers thereof which are more accessible at the low collagen surfaces.
• the concentration of collagen in the uppermost layer may range from about 10 to 100% and in the lowermost layer may range from about 0.5 to 10% with the difference in collagen content from maximum to minimum value being at least about 1%, and preferably at least about 4%.
• the fabric can be conceived of as comprising only two layers, i.e. two levels of collagen concentration or it may comprise an infinite number of layers, i.e. the collagen concentration may range continuously from its maximum to minimum concentrations.
• EXAMPLE 1 500 grams of a 50:50 mix of 3 denier 2 inch nylon-66 staple and 2 denier 3 inch polypropylene staple are suspended in 10 liters of water having 50 grams of collagen suspended therein, with agitation. The mix is filtered through a screen and after about half the suspension is deposited an additional 5 liters of water having 25 grams of collagen suspended therein is poured into the initial suspension at the same rate it is being filtered off. As a result there is formed a non-woven fleece having a collagen content from one of its surfaces to the middle and an in creasing content from 10% up to about 30% at the other surface. The product is tanned by contact with glutaric aldehyde at C., followed by drying. The fabric weighs 80 grams per square meter.
• EXAMPLE 2 distributed throughout the fabric. Between the low-collagen surfaces of two such fabrics there are deposited loose cotton fibers weighing '60 grams per square meter and heat is applied along the edges of a three inch square to produce bonding. By cutting just outside the bond line a highly absorbent surgical pad is formed.
• Example 3 The fabric of Example 1 is coated on its low-collagen surface with a 5% solution of polyvinylidene chloride in carbon tetrachloride in amount sufficient to deposit 40 grams of polyvinylidene chloride per square meter, the solvent thereafter being evaporated.
• a tubular casing which, when filled with sausage, keeps the sausage from drying out; the casing adheres snugly to the filling.
• a non-woven fabric comprising a fibrous mat, collagen binding the fibers of said mat together, the concentration of collagen being higher at one of the fabric surfaces than at the other surface, and a plastic film coating the lower collagen other surface, whereby when used to wrap meat with the high collagen surface in contact with such meat said fabrc will adhere snugly to the meat even upon shrinkage of the meat.

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• Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Textile Engineering (AREA)
• Veterinary Medicine (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Animal Behavior & Ethology (AREA)
• Chemical & Material Sciences (AREA)
• Wood Science & Technology (AREA)
• Hematology (AREA)
• Epidemiology (AREA)
• Zoology (AREA)
• Food Science & Technology (AREA)
• Biomedical Technology (AREA)
• Materials Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Vascular Medicine (AREA)
• Heart & Thoracic Surgery (AREA)
• Mechanical Engineering (AREA)
• Nonwoven Fabrics (AREA)
• Materials For Medical Uses (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=5753668

Family Applications (1)

Country Status (9)

Cited By (14)

Families Citing this family (6)

Family Cites Families (5)

• 1969
  • 1969-12-12 DE DE1962331A patent/DE1962331C3/de not_active Expired
• 1970
  • 1970-08-28 NL NL7012818A patent/NL166403C/xx not_active IP Right Cessation
  • 1970-09-02 CH CH1308270A patent/CH509806A/de not_active IP Right Cessation
  • 1970-11-12 US US3728207D patent/US3728207A/en not_active Expired - Lifetime
  • 1970-12-01 FR FR7043272A patent/FR2068808B1/fr not_active Expired
  • 1970-12-01 BE BE759688D patent/BE759688A/xx not_active IP Right Cessation
  • 1970-12-08 JP JP10886970A patent/JPS4944756B1/ja active Pending
  • 1970-12-10 GB GB5874470A patent/GB1333602A/en not_active Expired
  • 1970-12-11 AT AT103373A patent/AT319724B/de not_active IP Right Cessation
  • 1970-12-11 AT AT1117670A patent/AT313477B/de active

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