EP0230228A2 - Procédé pour la fabrication d'une bande constituée de spirales et bande constituée de spirales obtenue selon ce procédé - Google Patents

Procédé pour la fabrication d'une bande constituée de spirales et bande constituée de spirales obtenue selon ce procédé Download PDF

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Publication number
EP0230228A2
EP0230228A2 EP87100164A EP87100164A EP0230228A2 EP 0230228 A2 EP0230228 A2 EP 0230228A2 EP 87100164 A EP87100164 A EP 87100164A EP 87100164 A EP87100164 A EP 87100164A EP 0230228 A2 EP0230228 A2 EP 0230228A2
Authority
EP
European Patent Office
Prior art keywords
polyamide
wires
weight
relative viscosity
spiral fabric
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Withdrawn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
EP87100164A
Other languages
German (de)
English (en)
Other versions
EP0230228A3 (fr
Inventor
Rudolf Dipl.-Ing. Braeckeler
Hans-Georg Dr. Gelhaar
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of EP0230228A2 publication Critical patent/EP0230228A2/fr
Publication of EP0230228A3 publication Critical patent/EP0230228A3/fr
Withdrawn legal-status Critical Current

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
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0072—Link belts

Definitions

  • thermoplastic materials should be suitable for production, so far practical experience is only available with polyesters. Due to the known good mechanical properties, it would be desirable to provide wires made of polyamide-6,6 (polyhexamethylene adipic acid diamide) with a sufficiently large diameter for the manufacture of the spiral screens, the cross-section of which corresponds as closely as possible to the geometry of the nozzle bore and which have no voids. This is not possible with pure polyamide-6.6.
  • polyamide-6,6 polyhexamethylene adipic acid diamide
  • wires can be produced with a polymer mixture of 85 to 99% by weight of polyamide-6,6 and 15 to 1% by weight of polyamide-6 (poly-c-caprolactam).
  • the invention therefore relates to a process for the production of spiral sieves from polyamide wires which are deformed into right-handed and left-handed spirals in a manner known per se, alternately joined into one another and firmly connected to one another with plug-in wires, characterized in that a polymer mixture of 85 is used as the polyamide up to 99% by weight of polyamide-6,6 and 15 to 1% by weight of polyamide-6 is used.
  • Polyamide-6.6 with a relative viscosity of 3.0 to 5.0 is preferably used; the relative viscosity of the polyamide-6 is preferably 2.5 to 5.0.
  • the relative viscosity is determined at 0.1% by weight in m-cresol at 25 ° C.
  • the polyamide wires in particular have a diameter of 0.3 to 0.7 mm.
  • Preferred cross sections of the wires are round or rectangular, in particular round, for which purpose round or rectangular nozzle bores are used.
  • the two polyamides are mixed in the form of granules - optionally with the addition of a matting concentrate granulate based on PA 6 - in a tumble mixer (temperature 25 ° C., mixing time 1.5 h, mixed amount 2000 kg).
  • composition of the mixture is chosen so that the total PA 6 content does not exceed 15% by weight.
  • This mixture is melted in an extruder and spun in water at about room temperature.
  • the polyamide wire is stretched, fixed and wound in two stages in the usual way.
  • the polyamides can contain conventional additives such as matting agents and stabilizers.
  • the mixture of the granules is melted in a single-screw extruder so that the temperature of the melt is 290 ° C. and its pressure is 50 HPa.
  • the resulting raw wire with a diameter of 1.21 mm is stretched, fixed and wound up in two stages 1: 4.27.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Knitting Of Fabric (AREA)
  • Ropes Or Cables (AREA)
EP87100164A 1986-01-21 1987-01-08 Procédé pour la fabrication d'une bande constituée de spirales et bande constituée de spirales obtenue selon ce procédé Withdrawn EP0230228A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3601565 1986-01-21
DE19863601565 DE3601565A1 (de) 1986-01-21 1986-01-21 Verfahren zur herstellung von spiralsieben

Publications (2)

Publication Number Publication Date
EP0230228A2 true EP0230228A2 (fr) 1987-07-29
EP0230228A3 EP0230228A3 (fr) 1989-07-26

Family

ID=6292235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100164A Withdrawn EP0230228A3 (fr) 1986-01-21 1987-01-08 Procédé pour la fabrication d'une bande constituée de spirales et bande constituée de spirales obtenue selon ce procédé

Country Status (2)

Country Link
EP (1) EP0230228A3 (fr)
DE (1) DE3601565A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042900A1 (fr) * 1997-03-20 1998-10-01 Rhodia Filtec Ag Procede pour produire des monofilaments en polyamide et monofilament pour tissus techniques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014205422A1 (de) * 2014-03-24 2015-07-09 Voith Patent Gmbh Bespannung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4824408B1 (fr) * 1970-06-26 1973-07-20
DE2419751C3 (de) * 1974-04-24 1982-01-21 Kerber, geb. Poth, Hella, 6731 Weidenthal Drahtgliederband z.B. für Papiermaschinen
AU531985B2 (en) * 1979-04-23 1983-09-15 Textiel Techniek Haaksbergen B.V. Sieve belt for papermaking machine
US4395308A (en) * 1981-06-12 1983-07-26 Scapa Dyers Inc. Spiral fabric papermakers felt and method of making
EP0094638A3 (fr) * 1982-05-14 1986-02-05 Hermann Wangner GmbH & Co. KG Bande à chaínons et son procédé de fabrication
DE3416234A1 (de) * 1983-06-13 1984-12-13 Albany International Corp., Menands, N.Y. Papiermaschinenbespannung
DE3411112A1 (de) * 1984-03-26 1985-10-03 Fa. F. Oberdorfer, 7920 Heidenheim Spiralsiebband
FI85738C (fi) * 1984-05-01 1992-05-25 Jwi Ltd Torkduk med varptraodar av smaeltstraengsprutbar polyfenylensulfid och syntetisk industriduk.
EP0195835B1 (fr) * 1985-03-26 1991-02-27 Asten Group, Inc. Bande de tamisage sans fin pour machines à papier ou similaires

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042900A1 (fr) * 1997-03-20 1998-10-01 Rhodia Filtec Ag Procede pour produire des monofilaments en polyamide et monofilament pour tissus techniques
US6238608B1 (en) * 1997-03-20 2001-05-29 Rhodia Filtec Ag Method for producing polyamide monofilaments and monofilament for technical fabric

Also Published As

Publication number Publication date
EP0230228A3 (fr) 1989-07-26
DE3601565A1 (de) 1987-07-23

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Inventor name: BRAECKELER, RUDOLF, DIPL.-ING.

Inventor name: GELHAAR, HANS-GEORG, DR.