EP0045560B1 - Procédé pour la production d'un ruban de fibre de verre - Google Patents

Procédé pour la production d'un ruban de fibre de verre Download PDF

Info

Publication number
EP0045560B1
EP0045560B1 EP81302646A EP81302646A EP0045560B1 EP 0045560 B1 EP0045560 B1 EP 0045560B1 EP 81302646 A EP81302646 A EP 81302646A EP 81302646 A EP81302646 A EP 81302646A EP 0045560 B1 EP0045560 B1 EP 0045560B1
Authority
EP
European Patent Office
Prior art keywords
roving
glass fibre
minute
producing
metres
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
EP81302646A
Other languages
German (de)
English (en)
Other versions
EP0045560A1 (fr
Inventor
Alexander Munro
Lester Entwistle
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.)
Ppg Glass Fibres Ltd Te Wigan Groot-Brittanni
Original Assignee
TBA Industrial Products 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 TBA Industrial Products Ltd filed Critical TBA Industrial Products Ltd
Publication of EP0045560A1 publication Critical patent/EP0045560A1/fr
Application granted granted Critical
Publication of EP0045560B1 publication Critical patent/EP0045560B1/fr
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
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/16—Yarns or threads made from mineral substances
    • D02G3/18—Yarns or threads made from mineral substances from glass or the like

Definitions

  • This invention relates to the processing of continuous glass filaments and in particular it is concerned with the preparation of rovings from strands comprised of such filaments for conversion into fabrics by weaving and for use in the reinforcement of plastics, especially by the pultrusion process.
  • Catenary A well-known problem in the preparation of such rovings is the phenomenon sometimes known as "catenary". This is the lateral separation of individual strands from an untwisted roving made up of a bundle of such strands. It is caused by variations in tension present in the individual reel packages which are unwound and assembled side-by-side together to form the roving. "Catenary” gives rise to problems in further processing and in the final conversion of the roving; various methods are known for minimising its effect. These methods include sizing treatments and twisting processes, both of which give the desired cohesion, but at the expense of processing properties or the use of an extra process step, respectively.
  • a method of producing a coherent untwisted continuous multifilament glass fibre roving comprises the steps of withdrawing individual continuous multifilament glass fibre strands from each of a plurality of creel packages, assembling them side-by-side to form a single roving, passing said roving at a rate of from 150 to 300 metres/minute without positive overfeed through an air treatment zone constituted by a confined passageway into which air is introduced at 0.5 cubic metres/minute under a pressure of from 400 to 600 KN/metre 2 and thereafter winding the treated roving into a package.
  • an air treatment zone in this particular context means a confined passageway into which air is introduced under pressure. It has been found that relatively small air pressures and volume throughputs are highly effective to produce an essentially catenary-free strand, even with strand linear densities in the range 300 to 9000 tex and at strand throughputs of 150-300 metres/minute. Air pressures of the order of 400 to 600 KN/metre 2 and air volume throughputs of 0.5 to 1.5 cubic metres/minute are effective for present purposes; this is much less than would be used in conventional air jet texturing processes.
  • the present process has some similarity to the so-called co-mingling process, but the latter has hitherto been used for moderate texturing (bulking) of relatively fine manmade fibre yarns, in conjunction with heating to "set” the bulk developed. A degree of positive overfeed is used to ensure that such bulking is achieved.
  • the present process when applied to a very much coarser glass fibre roving in the complete absence of positive overfeed results in a roving which is not bulked, but essentially free from catenary. If the throughput is reduced towards 150 metres/minute, the product may exhibit an apparent bulk. This bulk is only apparent, in the sense that on applying moderate tension to the roving, it exhibits minimal or even zero extensibility, couped with practically no change in its catenary properties. This type of product has been found to be valuable for use as a plastics reinforcement, particular in pultrusion processes.
  • a particularly advantageous aspect of the invention lies in the fact that both of the two specific roving products just described can be made by incorporating the air treatment zone into the normal creel-to-package winding operation, without introducing any separate extra processing step. Conventional bulking apparatus is not needed for this.
  • a typical air treatment zone for present purposes comprises a V-shaped trough with a hinged lid clampable in sealing relation thereto.
  • a trough about 2.5 cm long and about 0.5 cm deep has been found satisfactory, the airflow being introduced half way along the trough through an aperture about 0.25 cm in diameter, in the bottom of the V.
  • the precise geometry of the air treatment zone may be varied and some experimentation may be necessary in order to arrive at the optimum conditions for a particular roving and throughput.
  • the degree of tangling and the amount of apparent bulk (if any) developed can be varied within sensibly wide limits whilst still achieving the desired catenary-free characteristic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Reinforced Plastic Materials (AREA)

Claims (2)

1. Procédé pour produire un ruban de fibre de verre multifilamentaire continu non retordu cohérent, le procédé étant caractérisé par les stades de prélever des mèches de fibre de verre multifilamentaires continues distinctes de chacune de plusieurs bobines de cantre, de les assembler côte à côte pour former un ruban unique, de faire passer le ruban à une vitesse de 150 à 300 m/minute à travers une zone de traitement dans l'air constituée par un passage confiné dans lequel de l'air est introduit à raison de 0,5 à 1,5 m3/minute sous une pression de 400 à 600 KN/m2 sans suralimentation positive et d'envider ensuite le ruban traité en une bobine.
2. Procédé suivant la revendication 1, caractérisé en ce que le ruban a une densité linéaire de 300 à 9000 tex.
EP81302646A 1980-06-21 1981-06-15 Procédé pour la production d'un ruban de fibre de verre Expired EP0045560B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8020414A GB2078797A (en) 1980-06-21 1980-06-21 Continuous multifilament glass fibre roving is rendered coherent and catenary-free by passing it through an air treatment zone without positive overfeed
GB8020414 1980-06-21

Publications (2)

Publication Number Publication Date
EP0045560A1 EP0045560A1 (fr) 1982-02-10
EP0045560B1 true EP0045560B1 (fr) 1984-11-14

Family

ID=10514238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81302646A Expired EP0045560B1 (fr) 1980-06-21 1981-06-15 Procédé pour la production d'un ruban de fibre de verre

Country Status (6)

Country Link
EP (1) EP0045560B1 (fr)
AU (1) AU538483B2 (fr)
DE (1) DE3167172D1 (fr)
FI (1) FI69448C (fr)
GB (1) GB2078797A (fr)
NO (1) NO152376C (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR845475A (fr) * 1937-11-05 1939-08-24 Vetreria Italiana Balz Perfectionnements à la fabrication de filés, en particulier de fils de verre, par étirage de voiles ou bandes de feutre
US2780909A (en) * 1953-03-24 1957-02-12 Owens Corning Fiberglass Corp Method of forming yarns from staple glass fibers
FR1253580A (fr) * 1960-04-04 1961-02-10 Asea Ab Procédé de fabrication de fils à partir de fibres continues
GB1065782A (en) * 1962-12-26 1967-04-19 Pittsburgh Plate Glass Co False twist device
US4020623A (en) * 1975-12-03 1977-05-03 Ppg Industries, Inc. Novel textile process

Also Published As

Publication number Publication date
NO152376B (no) 1985-06-10
FI69448C (fi) 1986-02-10
NO152376C (no) 1985-09-18
AU7200281A (en) 1982-01-07
AU538483B2 (en) 1984-08-16
EP0045560A1 (fr) 1982-02-10
DE3167172D1 (en) 1984-12-20
FI69448B (fi) 1985-10-31
FI811908L (fi) 1981-12-22
NO812099L (no) 1981-12-22
GB2078797A (en) 1982-01-13

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