EP1404721A4 - Monofilament de polyamide, produit textile plat et procede de production correspondant - Google Patents

Monofilament de polyamide, produit textile plat et procede de production correspondant

Info

Publication number
EP1404721A4
EP1404721A4 EP02747898A EP02747898A EP1404721A4 EP 1404721 A4 EP1404721 A4 EP 1404721A4 EP 02747898 A EP02747898 A EP 02747898A EP 02747898 A EP02747898 A EP 02747898A EP 1404721 A4 EP1404721 A4 EP 1404721A4
Authority
EP
European Patent Office
Prior art keywords
monofilament
cross
polyamide
flat textile
irradiation
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Withdrawn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
EP02747898A
Other languages
German (de)
English (en)
Other versions
EP1404721A1 (fr
Inventor
Hans-Peter Breuer
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.)
Albany International Corp
Original Assignee
Albany International Corp
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 Albany International Corp filed Critical Albany International Corp
Publication of EP1404721A1 publication Critical patent/EP1404721A1/fr
Publication of EP1404721A4 publication Critical patent/EP1404721A4/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Withdrawn legal-status Critical Current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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • 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
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/02—Moisture-responsive characteristics
    • D10B2401/021—Moisture-responsive characteristics hydrophobic

Definitions

  • the invention relates to a monofilament of polyamide, especially for flat textile products, for use in paper machines, for instance, as well as a flat textile product, a method for producing same and the use of a method for producing a flat textile product.
  • flat products are used as paper machine covers, e.g., as press felts. Press felts are conducted with the still moist paper web or cellulose web over rolls and through a series of roll pairs and water is removed from the moist web during this passage.
  • the press felt serves not only as a carrying surface for the moist web, but also to absorb the water pressed out of the web.
  • the water accumulating in the conveyor belt-like press felt is removed by dewatering devices, positioned for instance at a point where the paper web is no longer in direct contact with the press felt.
  • the paper web is transferred to a drying section where it is essentially subjected to thermal treatment, and is thereby further dewatered or dried.
  • monofilaments with strong thermal resistance such as PPS, PCTA and stabilized PETP, are primarily used for the paper machine covers.
  • patent EP 0 784 107 A2 discloses a method for producing a monofilament which contains, in addition to the polyamide, also a maleic anhydride-modified polyethylene/polypropylene rubber at the rate of 1% to 30% by weight, and anti-aging stabilizers at the rate of up to 3% by weight. This is supposed to improve the abrasion resistance and form stability of the industrial use flat product.
  • a cross-linked polyamide block polymer is known from the patents US-A 5,998,551 and JP-A 81 12 052.
  • a method for producing very strong fibers is known from the patent US-A 4,853,164.
  • a paper machine fabric made of polyethylene is known from US-A 4,421,819.
  • a method for producing very strong polyethylene fibers is known from the patent US-A
  • the objective of the present invention is to propose a monofilament of polyamide which features improved mechanical properties, especially with regard to abrasion, strength and proneness to splitting, but also with regard to the modification of properties over the course of time. It is also the objective of the invention to propose a flat textile product, especially a forming wire or press felt, for use in cellulose fiber preparation or paper production, for instance, and a method for producing such a flat textile product.
  • the objective is attained by a monofilament of the type mentioned in the beginning, containing polyamide at the rate of 99.9% to 90% by weight, and a cross-linkage reinforcement agent at the rate of 0.1 % to 10% by weight, the polyamide being at least partially cross-linked.
  • the polyamide is a meltable, spinnable, thread-forming polyamide.
  • Such a monofilament possesses the advantage that the molecule chains are bound to each other more closely and strongly as a result of the cross-linkage, which causes the formation of covalent bonds, thereby preventing the infiltration of water molecules between the molecule chains through the amorphous regions. Consequently, the hydrogen bridge linkages are no longer widened or loosened. The deterioration of the mechanical properties resulting as an-aging effect from the absorption of water can therefore be greatly reduced. Finally, the mechanical properties of the filament are also improved.
  • the invention-specific monofilaments display, for instance, less abrasion and less inclination to splitting.
  • the invention provides that the cross-linkage of the monofilaments is not limited to their border regions, but extends across the entire cross-section of the monofilament. In this regard, it is advantageous if no core/mantle effects are observed, of the kind, for instance, that can occur as a result of chemical cross-linkage.
  • the invention provides that the monofilament contains a crosslinkage reinforcement agent at the rate of 0.5% to 5% by weight and in particular preferably a cross-linkage reinforcement agent at the rate of 1% to 3% by weight.
  • TAIC triallyl isocyanurate
  • TAC can be used, for instance.
  • TAIC can be purchased in the market under the name Beta Link Master' from a number of companies, among them Plastic Technology Service Marketing-undmaschines GmbH, Adelshofen.
  • the invention provides that only a partial cross-linkage is effected, because a complete cross-linkage would cause the threads to become brittle.
  • PA 6 or PA 6.6 or mixtures of the two can be used. But other polyamides or mixtures with or made of other polyamides can also be used.
  • the invention also relates to a flat textile product, especially a forming wire or press felt, for use in cellulose fiber preparation or paper production, for instance, in which at least the warp threads consist of monofilaments having the properties described above.
  • the warp thread which runs in the transverse direction in the finished, possibly endlessly woven felt, is responsible in particular for the dimensional stability of the fabric.
  • the invention also relates to a method for producing flat textile products comprising monofilaments with the properties described above, in which the monofilament is extruded and subsequently drawn and woven, the monofilaments being mixed with a cross-linkage reinforcement agent prior to extrusion and irradiated with electron rays before and/or after the weaving process, by means of which the polyamides are partially cross-linked.
  • the use of electron radiation to effect the cross-linkage entails the advantage that no core/mantle effects are produced, i.e., the monofilaments are cross-linked across their entire cross section and not only in the border region (mantle). The electron rays penetrate the entire monofilament, so that cross-linkage also occurs in the core region.
  • the invention-specific monofilament was subjected to various different treatments, which are described below.
  • the values of the first sample were recorded without activator and before irradiation
  • the values of the first sample were recorded without activator and after irradiation.
  • the values of the second sample were calculated with activator before irradiation
  • the values of the second sample were calculated with activator after irradiation, all of which can be seen in Table 1.
  • Table 1 makes it clear that the threads were not damaged by the irradiation.
  • Figures 1 through 3 describe a further trial in which different polyamide samples were subjected to a hydrolysis test in an autoclave over a time period of 240 hours at 120°C in saturated steam.
  • the tensile force reduction is a measure of chemical damage, caused for instance by longitudinal cracks or by deformation to a polygon.
  • the shrinkages are less than in the samples without activator.
  • the hygral expansion is unchanged and the diameter modification in the sample with activator is much less than in the sample without activator.
  • the cracking resistance of the invention-specific monofilament declined much less sharply.
  • the gradient is a measure of the damage to the monofilament.
  • the gradient of cracking resistance change is less than in the known monofilaments. In this trial, 10 samples were produced of all materials. All samples were removed after 24 hours and tested for strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Artificial Filaments (AREA)
  • Woven Fabrics (AREA)
  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

L'invention concerne un monofilament de polyamide, notamment pour des produits textiles plats, destiné par exemple à être utilisé dans des machines à papier, ainsi qu'un produit textile plat et un procédé de production correspondant.
EP02747898A 2001-06-21 2002-06-13 Monofilament de polyamide, produit textile plat et procede de production correspondant Withdrawn EP1404721A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10131729 2001-06-21
DE10131729A DE10131729A1 (de) 2001-06-21 2001-06-21 Monofilament aus Polyamid, textiles Flächengebilde und Verfahren zum Herstellen eines solchen
PCT/US2002/018896 WO2003000742A1 (fr) 2001-06-21 2002-06-13 Monofilament de polyamide, produit textile plat et procede de production correspondant

Publications (2)

Publication Number Publication Date
EP1404721A1 EP1404721A1 (fr) 2004-04-07
EP1404721A4 true EP1404721A4 (fr) 2007-03-21

Family

ID=7690135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02747898A Withdrawn EP1404721A4 (fr) 2001-06-21 2002-06-13 Monofilament de polyamide, produit textile plat et procede de production correspondant

Country Status (15)

Country Link
EP (1) EP1404721A4 (fr)
JP (1) JP2004531657A (fr)
KR (1) KR20040012948A (fr)
CN (1) CN1285619C (fr)
AU (1) AU2002318345B2 (fr)
BR (1) BR0210511A (fr)
CA (1) CA2450533A1 (fr)
DE (1) DE10131729A1 (fr)
MX (1) MXPA03011732A (fr)
NO (1) NO20035709D0 (fr)
NZ (1) NZ529998A (fr)
RU (1) RU2003136274A (fr)
TW (1) TWI243218B (fr)
WO (1) WO2003000742A1 (fr)
ZA (1) ZA200309429B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602009001097D1 (de) * 2009-03-18 2011-05-26 Baumhueter Extrusion Gmbh Polymerfaser, deren Verwendung und Verfahren zu deren Herstellung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540597A (en) * 1983-11-22 1985-09-10 Sumitomo Electric Industries, Ltd. Process for producing optical fiber for optical transmission
WO1986005739A1 (fr) * 1985-04-01 1986-10-09 Raychem Corporation Fibres polymeres a grande resistance
WO2000057696A1 (fr) * 1999-03-26 2000-10-05 Atlantic Gillnet Supply, Inc. Filet de peche acoustiquement visible

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549967B2 (fr) * 1972-05-24 1980-12-15
US4072792A (en) * 1973-05-21 1978-02-07 Nitto Boseki Co., Ltd. Fiber reinforced plastic flat plates
JPS5513742A (en) * 1978-07-18 1980-01-30 Teijin Ltd Aromatic polyamide film and its production
US4348502A (en) * 1981-01-23 1982-09-07 Monsanto Company Thermoplastic compositions of nylon and ethylene-vinyl acetate rubber
US4421819A (en) * 1982-02-23 1983-12-20 Jwi Ltd. Wear resistant paper machine fabric
JPS6042254A (ja) * 1983-08-11 1985-03-06 Sumitomo Electric Ind Ltd 光フアイバ−の製造方法
US4853164A (en) * 1987-04-27 1989-08-01 Raychem Corporation Method of producing high strength fibers
US5713396A (en) * 1990-06-06 1998-02-03 Asten, Inc. Papermakers fabric with stacked machine and cross machine direction yarns
DE19600162A1 (de) * 1996-01-04 1997-07-10 Bayer Faser Gmbh Schmelzgesponnene, scheuerbeständige Monofile
US5998551A (en) * 1997-06-02 1999-12-07 Lawrence A. Acquarulo Crosslinked nylon block copolymers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540597A (en) * 1983-11-22 1985-09-10 Sumitomo Electric Industries, Ltd. Process for producing optical fiber for optical transmission
WO1986005739A1 (fr) * 1985-04-01 1986-10-09 Raychem Corporation Fibres polymeres a grande resistance
WO2000057696A1 (fr) * 1999-03-26 2000-10-05 Atlantic Gillnet Supply, Inc. Filet de peche acoustiquement visible

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03000742A1 *

Also Published As

Publication number Publication date
WO2003000742A1 (fr) 2003-01-03
JP2004531657A (ja) 2004-10-14
DE10131729A1 (de) 2003-01-09
MXPA03011732A (es) 2005-07-25
CA2450533A1 (fr) 2003-01-03
CN1516708A (zh) 2004-07-28
CN1285619C (zh) 2006-11-22
EP1404721A1 (fr) 2004-04-07
ZA200309429B (en) 2004-12-06
RU2003136274A (ru) 2005-05-20
AU2002318345B2 (en) 2007-05-31
KR20040012948A (ko) 2004-02-11
NO20035709D0 (no) 2003-12-19
TWI243218B (en) 2005-11-11
BR0210511A (pt) 2004-10-05
NZ529998A (en) 2005-05-27

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