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WO1998038363A1 - Pansements - Google Patents

Pansements Download PDF

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Publication number
WO1998038363A1
WO1998038363A1 PCT/GB1998/000630 GB9800630W WO9838363A1 WO 1998038363 A1 WO1998038363 A1 WO 1998038363A1 GB 9800630 W GB9800630 W GB 9800630W WO 9838363 A1 WO9838363 A1 WO 9838363A1
Authority
WO
WIPO (PCT)
Prior art keywords
elastic
filament
heterochain
block copolymers
elastic filament
Prior art date
Application number
PCT/GB1998/000630
Other languages
English (en)
Inventor
Steven Thomas Hardwick
Original Assignee
Smith & Nephew Plc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Smith & Nephew Plc filed Critical Smith & Nephew Plc
Priority to EP98908203A priority Critical patent/EP0963465A1/fr
Priority to AU66287/98A priority patent/AU729101B2/en
Priority to CA002282648A priority patent/CA2282648A1/fr
Publication of WO1998038363A1 publication Critical patent/WO1998038363A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • 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
    • A61F13/06—Bandages or dressings; Absorbent pads specially adapted for feet or legs; Corn-pads; Corn-rings
    • A61F13/08—Elastic stockings; for contracting aneurisms
    • 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
    • A61L15/42—Use of materials characterised by their function or physical properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/30—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising olefins as the major constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/82—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from polyester amides or polyether amides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/86—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from polyetheresters

Definitions

  • This invention relates to elastic fliaments, formed from an elastomeric material, that is suited for use in woven or knitted elastic compression bandages for application to a body portion.
  • Woven or knitted elastic bandages are used to provide support and to assist in the repair of soft tissues such as the healing of strained muscles and in the treatment of various venous conditions.
  • EP-A-0460040 discloses a bandage which generates the required compressive force at low extensions.
  • the bandage contains both elastic and inelastic yarns, which show a large rate of increase in compressive force with extension at low extensions until the required extension is reached after which the force increases only slightly even though there may be a large increase in extension.
  • an elastic filament formed from an elastomeric material wherein the filament achieves an effective compressive force at an extension between 20 to 60% after which any further extension of the filament up to an extension of 100% is accompanied by only a small increase in compressive force characterized in that the elastic filament has a resistance to degradation by hydrocarbon oils of at least 24 hours and the elastomeric material comprises heterochain segmented block copolymers.
  • the measurement of resistance to degradation by hydrocarbon oils is determined when the filaments are tested under the conditions described in Example 1 herein.
  • the filaments of the invention have a resistance to degradation of at least 24 hours and preferably at least 48 hours.
  • an elastic bandage which comprises a fabric containing both inelastic and elastic filaments in accordance with this invention.
  • the elastic filaments preferably comprise hydrocarbon elastomeric based A-B-A tri-block copolymers substituted with heterochain segmented block copolymers.
  • the elastic yarns may comprise synthetic elastomeric heterochain segmented block copolymers.
  • the molecular weight of a segment for a segmented block copolymer is typically from 400 to 6000g/mol. Furthermore the segments are preferably chemically incompatible so that the segmented block copolymers are likely to form phases. For example, hard block may form a glassy or crystalline phase and the soft block may form a rubbery phase. The exact morphology depends on the nature of the polymer molecular structure and on the processing history.
  • copolymers used in the present invention preferably comprise but are not limited to urethane and or amide based polymers.
  • Urethane based polymers aptly consist of two types of segment: a) a soft block segment, for example a hydroxy terminated species of a low molecular weight, typically in the range from 600 to 6000g/mol such as a polyether or polyester. Other examples include hydroxy terminated siloxane, butadiene and isobutylene polymers. Suitable materials include poly(ethylene adipate) glycol, poly(tetra-methylene adipate) glycol, poly(hexamethylene adipate) glycol, poly(tetramethylene glycol) and poly(propylene glycol).
  • a hard block segment for example difunctional isocyanates reacted with chain extenders such as difunctional amines, alcohols and acids to give hard block segments with molecular weights up to 600g/mol.
  • chain extenders such as difunctional amines, alcohols and acids
  • suitable isocyanates include, but are not limited to p-phenyl diisocyanate, diphenylmethane-pp'-diisocyanate, m-phenyl diisocyanate, 2,4-toluene diisocyanate.
  • Amide based polymers are aptly composed of hard polyamide blocks and a soft block typically comprising polyethers, polyesters and polyether esters.
  • polystyrene foams include polyetheresters and polysiloxane ureas.
  • Rubber/olefin blends and elastomeric alloys may also separate out into hard and soft blocks.
  • Rubber/olefin blends may typically contain a crystalline hard block consisting of isotactic polypropylene and a soft block consisting of EPR (ethylene propylene rubber) or EPDM (ethylene propylene diene monomer) rubber.
  • EPR ethylene propylene rubber
  • EPDM ethylene propylene diene monomer
  • Elastomeric alloy thermoplastic vulcanisates may typically consist of a hard block containing polyethylene or polypropylene and a soft block containing a vulcanised diene or EPDM rubber.
  • the heterochain segmented block copolymers as hereinbefore described are formed from many hard and soft block segments along the polymer chain.
  • the molecular weight for the heterochain segmented block copolymers is up to 400,000g/mol.
  • copolymers used in the present invention are formed into elastic filaments prior to their being knitted or woven into bandages.
  • the elastic filaments of the present invention may be prepared by extrusions methods known to those skilled in the art. Apt filament diameters are from 0.1mm to 4mm, preferably from 0.1mm to 2mm.
  • copolymers for use in the present invention may be blended with other additives in order to aid processing; for example lubricants and or plasticisers.
  • Lubricants may include but are not limited to hydrocarbon waxes, such as low molecular weight polyethylene; metal soaps such as zinc, magnesium and calcium stearate; silicone oils such as poly(dimethylsiloxane); molybdenum disulphide powder and graphite powder.
  • hydrocarbon waxes such as low molecular weight polyethylene
  • metal soaps such as zinc, magnesium and calcium stearate
  • silicone oils such as poly(dimethylsiloxane); molybdenum disulphide powder and graphite powder.
  • Plasticisers may include but are not limited to esters of diacids such as esters of alkanedioic acids and esters of dibenzoic acids; dipropylene glycol esters and dipropylene glycol dibenzoate. These are particularly suitable for polyurethanes.
  • An apt polyamide plasticiser includes a mixture of o- and p-toluene ethyl sulphonamide.
  • the bandage may be knitted or woven using methods known to those skilled in the art, furthermore the bandage may comprise a tubular bandage.
  • the elastic filaments in accordance with the invention and for use in bandages of the invention have a force-extension relationship where at low extensions the rate of increase of compressive force with extension is large until an extension is reached after which any further extension is accompanied by only a small increase in compressive force.
  • the force extension relationship of such yarns may be measured by stretching a sample of the yarn using an INSTRON Tensile Testing Machine, and representing the results graphically.
  • the elastic filaments may be used as monofilaments or multifilaments.
  • the ratio of elastic filaments into elastic yarns or filaments may vary depending on the nature of the fabric. Preferably the ratio will be between 1:1 and 1:2.
  • the present invention provides an elastic bandage which comprises a fabric containing both inelastic and elastic filaments in which the ratio of elastic filaments to inelastic filaments is from 1:1 to 1:12 and in which the bandage achieves an effective compressive force at an extension between 20 to 60% after which any further extension of the bandage up to an extension of 100% is accompanied by only a small increase in compressive force wherein the elastic filaments comprise an elastomeric heterochain segmented block copolymer.
  • the elastic filaments may also be further suitable for use in other materials such as compression bandages, compression hosiery, hosiery, garments and clothing.
  • Suitable materials were obtained and extruded into filaments with a diameter of 0.43mm.
  • Tensile tests were performed on the filaments using a crosshead speed of 500mm/min on a Zwick 1435 tensometer. In the tests 5 lengths of filaments were stuck on a card template which is then mounted in a set of pneumatic grips.
  • Immersion tests are performed by suspending the filaments (3 for each material) between the sides of a box with dimensions such that when the filaments were weighed down to the bottom of the box they were at 50% extension. Box dimensions were 15cm x 25cm x

Landscapes

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

Abstract

L'invention se rapporte à une fibre élastique formée à partir d'une matière élastomère. Selon cette invention, la fibre atteint une force de compression efficace pour une extension située entre 20 et 60 %, valeur à partir de laquelle toute extension ultérieure de la fibre, jusqu'à une extension de 100 %, est simplement accompagnée d'une faible augmentation de la force de compression. La fibre élastique résiste à la dégradation par les huiles hydrocarbures. La matière élastomère contient des copolymères séquencés segmentés à hétérochaîne.
PCT/GB1998/000630 1997-02-28 1998-02-27 Pansements WO1998038363A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98908203A EP0963465A1 (fr) 1997-02-28 1998-02-27 Pansements
AU66287/98A AU729101B2 (en) 1997-02-28 1998-02-27 Bandages
CA002282648A CA2282648A1 (fr) 1997-02-28 1998-02-27 Pansements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9704206.3A GB9704206D0 (en) 1997-02-28 1997-02-28 Bandages
GB9704206.3 1997-02-28

Publications (1)

Publication Number Publication Date
WO1998038363A1 true WO1998038363A1 (fr) 1998-09-03

Family

ID=10808495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/000630 WO1998038363A1 (fr) 1997-02-28 1998-02-27 Pansements

Country Status (6)

Country Link
EP (1) EP0963465A1 (fr)
AU (1) AU729101B2 (fr)
CA (1) CA2282648A1 (fr)
GB (1) GB9704206D0 (fr)
WO (1) WO1998038363A1 (fr)
ZA (1) ZA981669B (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1192390A (en) * 1967-08-11 1970-05-20 Ici Ltd Polyurethanes
JPS5756513A (en) * 1980-09-17 1982-04-05 Teijin Ltd Elastic filament
EP0460040B1 (fr) * 1989-02-25 1994-09-21 Smith & Nephew P.L.C. Bandage elastique tisse ou tricote
US5413849A (en) * 1994-06-07 1995-05-09 Fiberweb North America, Inc. Composite elastic nonwoven fabric
EP0723767A2 (fr) * 1995-01-27 1996-07-31 JOHNSON & JOHNSON PROFESSIONAL Inc. Bandage conformable pour plâtres orthopédiques
WO1996038620A1 (fr) * 1995-06-01 1996-12-05 Kimberly-Clark Worldwide, Inc. Stratifies non tisses elastomeres plats

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1192390A (en) * 1967-08-11 1970-05-20 Ici Ltd Polyurethanes
JPS5756513A (en) * 1980-09-17 1982-04-05 Teijin Ltd Elastic filament
EP0460040B1 (fr) * 1989-02-25 1994-09-21 Smith & Nephew P.L.C. Bandage elastique tisse ou tricote
US5413849A (en) * 1994-06-07 1995-05-09 Fiberweb North America, Inc. Composite elastic nonwoven fabric
EP0723767A2 (fr) * 1995-01-27 1996-07-31 JOHNSON & JOHNSON PROFESSIONAL Inc. Bandage conformable pour plâtres orthopédiques
WO1996038620A1 (fr) * 1995-06-01 1996-12-05 Kimberly-Clark Worldwide, Inc. Stratifies non tisses elastomeres plats

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BHOWMICK A K ET AL: "HANDBOOK OF ELASTOMERS", 1988, MARCEL DEKKER, NEW YORK,US, XP002070658, 157330 *
LEGGE NR ET AL: "Thermoplastic Elastomers", 1987, HANSER PUBLISHERS, MUNICH,DE, XP002070659, 160800 *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 131 (C - 114) 17 July 1982 (1982-07-17) *

Also Published As

Publication number Publication date
EP0963465A1 (fr) 1999-12-15
ZA981669B (en) 1998-08-28
AU6628798A (en) 1998-09-18
CA2282648A1 (fr) 1998-09-03
AU729101B2 (en) 2001-01-25
GB9704206D0 (en) 1997-04-16

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