EP0154423B1 - Röntgenoskopisches kontrastierendes Umwindegarn - Google Patents

Röntgenoskopisches kontrastierendes Umwindegarn Download PDF

Info

Publication number
EP0154423B1
EP0154423B1 EP85300891A EP85300891A EP0154423B1 EP 0154423 B1 EP0154423 B1 EP 0154423B1 EP 85300891 A EP85300891 A EP 85300891A EP 85300891 A EP85300891 A EP 85300891A EP 0154423 B1 EP0154423 B1 EP 0154423B1
Authority
EP
European Patent Office
Prior art keywords
yarn
radio opaque
filament
filled
opaque yarn
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.)
Expired
Application number
EP85300891A
Other languages
English (en)
French (fr)
Other versions
EP0154423A1 (de
Inventor
Edmund Hugh Carus
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.)
Vernon Carus Ltd
Original Assignee
Vernon Carus Ltd
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 Vernon Carus Ltd filed Critical Vernon Carus Ltd
Priority to AT85300891T priority Critical patent/ATE33997T1/de
Publication of EP0154423A1 publication Critical patent/EP0154423A1/de
Application granted granted Critical
Publication of EP0154423B1 publication Critical patent/EP0154423B1/de
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties

Definitions

  • This invention relates to radio opaque yarn such as that used in the manufacture of surgical swabs and dressings.
  • Radio opaque filaments, resp. fibres are disclosed in our European patent application No. 83304777.2 (EP-A-101650). These fibres contain a high proportion of barium sulphate in order to provide the required degree of X-ray opacity. Such highly filled fibres tend to stretch due to fracture of the constituent filaments. Moreover the fractured filaments tend to run causing aggregations which may snarl-up during weaving.
  • a radio opaque yarn comprises a bundle of filled filaments containing not less than 54% w/w of barium sulphate, characterised in that the bundle is bound with up to 20% w/w of a substantially unfilled filament having a diameter of 0.05 of the diameter of the bundle of filled filaments, wherein the yarn comprises 2 to 8 turns per cm of the binding filament.
  • Conventional wrapped yarns contain approximately 50% by weight of binding filament.
  • the present invention employs a higher proportion of filled filaments. This is important in the production of radio opaque yarns to optimise the opacity of the product.
  • the unfilled, binding filament may have a higher modulus and tensile strength than the filled filaments, increasing the strength and durability of the yarn. Furthermore the binding prevents running of any fractured filled filaments. This particularly facilitates narrow weaving or knitting where control of yarn tension is important.
  • the binding filaments may be monofilament or multifilament.
  • Preferred yarns in accordance with this invention comprise less than 5% w/w of binding filament.
  • the binding filament may be wound at a preferred rate of 4 to 6 turns per cm, more preferably 4 turns per cm. Yarn having less than 2 turns per cm of wrapping filament tend to fragment during weaving, whereas yarn having more than 8 turns per cm is brittle and liable to break during cloth processing.
  • the binding filament preferably comprises a polyester although alternative materials which form filaments having a high modulus and tensile strength may be employed.
  • the filled filament preferably comprises polypropylene. Polyester filaments have also been found to be applicable. A maximum of 80% w/w of barium sulphate has been found to be appropriate although a maximum of 70% w/w may be preferred.
  • a coupling agent may be employed, for example an alkanoyl triisostearoyl titanate or other of the coupling agents disclosed in European patent application No. 83304777.2.
  • binding filaments may be employed although use of a single filament is preferred because wrapping with a plurality of filaments has not been found to confer any additional advantages.
  • the binding filaments may be textured, bulked, crimped or otherwise treated both to impart extensibility to the yarn and to improve the ability of the yarn to withstand wet and dry fabric finishing operations.
  • a bundle of twenty filaments composed of polypropylene (melt flow index 12, 29.5% w/w), barium sulphate (particle size 0.5 ⁇ m, 70% w/w) and a coupling agent isopropyl triisostearoyl titanate (0.5% w/w) and a pigment (Cobalt Blue Med) having a weight of not less than 3000 decitex was wrapped with 4 turns per cm of a flat polyester fibre (24 filament, 74 decitex, no added lubricant).
  • the resultant yarn contained 68% w/w of barium sulphate and satisfied both -the British Phar- macopea Index test (reference SDM XVII) and the U.S. pharmaceutical X-ray opacity requirements.
  • the yarn was found to have a minimum breaking load greater than 500 cN and a breaking extension not less than 100% but not greater than 300%. The yarn could be woven without difficulty.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)

Claims (8)

1. Röntgenoskopisches kontrastierendes Garn mit einem Bündel von mit Füllstoff versehenen Fäden, die zumindest 54 Gewichtsprozent Bariumsulfat enthalten, dadurch gekennzeichnet, daß das Bündel mit einem bis zu 20 Gewichtsprozent ausmachenden, im wesentlichen füllstofffreien Faden gebunden ist, dessen Durchmesser 0,05 des Durchmessers des Bündels der mit Füllstoff versehenen Fäden beträgt, wobei das Garn pro Zentimeter 2 bis 8 Windungen des bindenden Fadens aufweist.
2. Röntgenoskopisches kontrastierendes Garn nach Anspruch 1, dadurch gekennzeichnet, daß der bindende Faden weniger als 5 Gewichtsprozent des Garns ausmacht.
3. Röntgenoskopisches kontrastierendes Garn nach Anspruch 1, dadurch gekennzeichnet, daß das Garn pro Zentimeter 4 bis 6 Windungen des bindenden Fadens aufweist.
4. Röntgenoskopisches kontrastierendes Garn nach einem vorausgehenden Anspruch, dadurch gekennzeichnet, daß der bindende Faden Polyester aufweist.
5. Röntgenoskopisches kontrastierendes Garn nach irgendeinem vorausgehenden Anspruch, dadurch gekennzeichnet, daß der mit Füllstoff versehen Faden Polypropylen oder Polyester aufweist.
6. Röntgenoskopisches konstrastierendes Garn nach Anspruch 5, dadurch gekennzeichnet, daß der mit Füllstoff versehene Faden 54 bis 80 Gewichtsprozent Bariumsulfat aufweist.
7. Röntgenoskopisches kontrastierendes Garn nach Anspruch 5, dadurch gekennzeichnet, daß der mit Füllstoff versehene Faden 54 bis 70 Gewichtsprozent Bariumsulfat aufweist.
8. Röntgenoskopisches kontrastierendes Garn nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Garn als Kupplungsmittel Alkanoyl-triisostearoyl-titanat enthält.
EP85300891A 1984-02-11 1985-02-11 Röntgenoskopisches kontrastierendes Umwindegarn Expired EP0154423B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85300891T ATE33997T1 (de) 1984-02-11 1985-02-11 Roentgenoskopisches kontrastierendes umwindegarn.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848403656A GB8403656D0 (en) 1984-02-11 1984-02-11 Yarns
GB8403656 1984-02-11

Publications (2)

Publication Number Publication Date
EP0154423A1 EP0154423A1 (de) 1985-09-11
EP0154423B1 true EP0154423B1 (de) 1988-05-04

Family

ID=10556475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85300891A Expired EP0154423B1 (de) 1984-02-11 1985-02-11 Röntgenoskopisches kontrastierendes Umwindegarn

Country Status (5)

Country Link
EP (1) EP0154423B1 (de)
AT (1) ATE33997T1 (de)
CA (1) CA1262815C (de)
DE (1) DE3562494D1 (de)
GB (2) GB8403656D0 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8716243D0 (en) * 1987-07-10 1987-08-19 Courtaulds Plc Yarns
EP0304311A1 (de) * 1987-08-21 1989-02-22 The Wellcome Foundation Limited Komplexe von Polyethylenglycol mit Gewebeplasminogenaktivator
US6169045B1 (en) 1993-11-16 2001-01-02 Kimberly-Clark Worldwide, Inc. Nonwoven filter media
CN103741304A (zh) * 2013-07-09 2014-04-23 浙江川本卫生材料有限公司 医用x光可探测缝纫线

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB839718A (en) * 1957-11-19 1960-06-29 Robinson & Sons Ltd Improvements in surgical dressings
FR1188629A (fr) * 1957-11-22 1959-09-24 Vernon & Company Ltd Perfectionnements apportés aux fils et pansements chirurgicaux décelables par les rayons chi.
US3736935A (en) * 1971-02-17 1973-06-05 Codman & Shurtleff Surgical sponge

Also Published As

Publication number Publication date
DE3562494D1 (en) 1988-06-09
GB8403656D0 (en) 1984-03-14
GB8430257D0 (en) 1985-01-09
GB2153867B (en) 1986-12-03
EP0154423A1 (de) 1985-09-11
ATE33997T1 (de) 1988-05-15
CA1262815A (en) 1989-11-14
CA1262815C (en) 1989-11-14
GB2153867A (en) 1985-08-29

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