EP0617743B1 - Monofilament antisalissures pour tamis de machine a papier, son procede de fabrication et son application - Google Patents

Monofilament antisalissures pour tamis de machine a papier, son procede de fabrication et son application Download PDF

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Publication number
EP0617743B1
EP0617743B1 EP93917512A EP93917512A EP0617743B1 EP 0617743 B1 EP0617743 B1 EP 0617743B1 EP 93917512 A EP93917512 A EP 93917512A EP 93917512 A EP93917512 A EP 93917512A EP 0617743 B1 EP0617743 B1 EP 0617743B1
Authority
EP
European Patent Office
Prior art keywords
monofilament
weight
repellent
copolymer
polyethylene terephthalate
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 - Lifetime
Application number
EP93917512A
Other languages
German (de)
English (en)
Other versions
EP0617743A1 (fr
Inventor
Halim Baris
Erwin Lerch
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.)
ExNex AG
Original Assignee
Rhodia Filtec 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4240408&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0617743(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rhodia Filtec AG filed Critical Rhodia Filtec AG
Publication of EP0617743A1 publication Critical patent/EP0617743A1/fr
Application granted granted Critical
Publication of EP0617743B1 publication Critical patent/EP0617743B1/fr
Anticipated expiration legal-status Critical
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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
    • D01F6/92—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 polyesters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/903—Paper forming member, e.g. fourdrinier, sheet forming member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2915—Rod, strand, filament or fiber including textile, cloth or fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester

Definitions

  • the invention relates to a dirt-repellent Monofilament for paper machine screens with one Diameters from 0.2 to 0.7 mm, consisting of at least 85% by weight Polyethylene terephthalate with a viscosity index (V.I.) of at least 96 dl / g and a copolymer, process for the production and its use.
  • V.I. Viscosity index
  • Dirt-repellent properties for paper machine screens supposed to be wet pollution that too Resistance to hydrolysis presupposes to be understood.
  • the Dirt repellency is supposed to serve the cleaning cycles extend a sieve, doing the cleaning work under a high pressure water jet and if necessary under Rubbing is done with a brush.
  • Dirt-repellent monofilaments that work simultaneously hydrolysis should become technical Fabrics processed and especially in the dryer section used in a paper machine. Such dryer fabrics are Exposed to temperatures well over 100 ° C and moisture as well as when cleaning increased mechanical stress. Dirt-repellent polyester monofilaments have become not proven to be susceptible to hydrolysis.
  • additives in the form of stabilizers was a achieved further improvement in hydrolysis resistance, which, however, for paper machine fabrics Dryer section still not enough.
  • the increase the dirt-repellent properties were next to the Addition of additives also by suitable Spin finishes, filament finishing treatments as well Post-treatment on the tissue tried.
  • Monofilaments were also made from the copolymer Ethylene tetrafluoroethylene produced, the thermal and chemical resistance are excellent and therefore in chemical process engineering. It dryer fabrics for paper machines are known, which on the Carry such monofilaments and the underlying support fabric made of polyester monofilaments protect against pollution.
  • the excellent chemical properties of fluoropolymers however, their insufficient tensile strength and Stretch properties.
  • EP-A-0 506 963 is a hydrolysis-stable and dirt-repellent Monofilament known, which consists of a mixture of a Polyethylene terephthalate with a fluoropolymer and unreacted carbodiimide consists. Cabodiimide is used in excess to the monofilament to make it resistant to hydrolysis in the long term. The monofilament is in its structure obviously not homogeneous.
  • the fluorine-containing polymer can be in the form of fibrils be distributed in a matrix of PET, but also consist of a core sheath.
  • the object of the invention is a dirt-repellent To provide monofilament that is high Claims of a technical fabric in relation to its chemical, dirt repellent, mechanical and abrasion-resistant properties are sufficient and special in the dryer section of a paper machine screen Is used.
  • Another object of the invention is a method to provide that the economic Manufacture of dirt-repellent monofilaments allowed.
  • the object is achieved in that the monofilament 1.5 to 5 wt .-% of a polynary Copolymers prepared from alkenes and perfluorate kenes, contains and one over the entire cross section has a homogeneous composition.
  • a polyester is used that of at least 85% by weight of polyethylene terephthalate consists. It should be emphasized as a particular advantage that the manufactured monofilament over the entire cross-section has a homogeneous composition. It can If necessary, melt 1 to 3% of color pigments be added.
  • the copolymers which have from 50 % By weight of ethene and about 50% by weight of tetrafluoroethene, proven.
  • the copolymer can be in the form of a Masterbatch, which consists of approximately 50% by weight and approximately 50% by weight Copolymer exists, added to the melt become.
  • the dirt-repellent monofilaments have a diameter of 0.2 to 0.7 mm, and consist of a polymer blend Polyethylene terephthalate with at least 85% by weight Polyethylene terephthalate units and 1.5 to 5% by weight, in particular 1.5 to 3.0% by weight of a polynary copolymer, made from alkenes and perfluoroalkenes, consist.
  • Polynary copolymers have in particular proven binary systems. These are just through To obtain copolymerization of the individual components. Copolymers of ethene and tetrafluoroethene are due advantageous for their easy availability, being a Melting point in the range between 255 ° C and 275 ° C is particularly useful. Other binary or polynary Fluoroplastics such as modified hexafluoropropylene Polytetrafluorethylene, polyvinylidene fluoride and the like can be used.
  • the monofilament is 1.5 up to 5% by weight of the copolymers mentioned Polyfluoroalkylene units, preferably 1.5 to 3% by weight, contains in particular 2 to 3 wt .-%.
  • the strength of the monofilaments is higher than 36 cN / tex, in particular 36 to 60 cN / tex with an elongation of ⁇ 44 %, based on the unstretched filament, where as essential feature surprisingly the Dirt repellency is particularly good.
  • the dirt repellent is as soiling index with ⁇ 2 after 5 soiling / washing cycles, compared to> 5 in one Polyester filament without copolymers was determined.
  • the invention is based on an example and a Comparative example will be described in more detail.
  • Hydrolysis-stabilized, highly viscous (VI 96) polyethylene terephthalate is in a known manner at a temperature of 290 ° C via a spinneret with a hole diameter of 1.8 mm with a throughput of 486 g / min melt extruded.
  • the extruded monofilaments are cooled in a water bath at 70 ° C. After cooling the monofilaments are spin-treated and with a Draw ratio of 5.25x total, relaxed and at a speed of 100 m / min wound up.
  • the resulting thread with a Diameter of 0.50 mm shows after 5 treatments has a soiling index of less than 2 ( ⁇ 2) a strength (Ft) of 37 cN / tex with an elongation (Dt) of 39% and a thermal shrinkage (TS at 160 ° C) of 0.4 %, based on the unshrunk thread.
  • the AI values shown in Figure 1 show the influence of successive cycles "Soiling" R / "washing out” + W. There are AI mean values in each case of two cartels after soiling and shown after washing out.
  • Curve 1 shows the monofilament thread according to the invention.
  • Curve 2 shows a comparison thread made of polyester according to the Technology, i.e. without (II). After (five) 5 soiling / washing cycles are with the inventive Monofilament indexes reached below 2.
  • the monofilament according to the invention brings Improvement by a factor of 4 to 5 compared to the status of the technique. It is preferred for use in Suitable for paper machine fabrics.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Woven Fabrics (AREA)
  • Artificial Filaments (AREA)

Claims (6)

  1. Monofilament anti-salissures pour tamis de machine de papeterie, avec un diamètre de 0,2 à 0,7 mm, composé d'un polyester formé d'au moins 85 % en masse de polyéthylène téréphtalate avec un indice de viscosité (V.I.) d'au moins 96 dl/g et d'un copolymérisat, caractérisé en ce que le monofilament comporte 1,5 à 5 % en masse d'un multiple copolymérisat fabriqué à partir d'alcènes et d'alcènes perfluorés, et montre une composition homogène sur la totalité de la coupe transversale.
  2. Monofilament selon la revendication 1, caractérisé en ce que le copolymérisat est composé d'éthylène et de tétrafluoroéthylène.
  3. Monofilament selon la revendication 1, caractérisé en ce que le copolymérisat possède un point de fusion compris entre 255°C et 275°C.
  4. Monofilament selon les revendications 1 à 3, caractérisé par une ténacité d'au moins 36 cN/tex, un allongement inférieur à 44 %, mesuré par rapport au filament non allongé, et simultanément un indice de salissure inférieur à 2 après 5 cycles de salissure / lavage.
  5. Procédé pour la fabrication d'un monofilament anti-salissures pour tamis de machine de papeterie, avec un diamètre de 0,2 à 0,7 mm, à partir d'une masse fondue de polymère composé d'un mélange de polyester formé d'au moins 85 % en masse de polyéthylène téréphtalate avec un indice de viscosité (V.I.) d'au moins 96 dl /g et d'un copolymérisat, caractérisé en ce que la masse fondue en polyéthylène téréphtalate est mélangée avant l'extrusion avec 1,5 à 5 % en masse d'un copolymérisat fabriqué à partir d'alcènes et d'alcènes perfluorés et que le monofilament montre une composition homogène sur la totalité de la coupe transversale.
  6. Utilisation des monofilaments anti-salissures avec un diamètre de 0,2 à 0,7 mm, composés d'un mélange polymérique à base de polyester comprenant au moins 85 % en masse de polyéthylène téréphtalate avec un indice de viscosité (V.I.) d'au moins 96 dl/g et 1,5 à 5 % en masse d'un multiple copolymérisat d'alcènes et d'alcènes perfluorés, et avec une composition homogène sur la totalité de la coupe transversale, pour la fabrication de tissus tamis pour machine de papeterie.
EP93917512A 1992-09-01 1993-08-17 Monofilament antisalissures pour tamis de machine a papier, son procede de fabrication et son application Expired - Lifetime EP0617743B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH273492 1992-09-01
CH273492 1992-09-01
CH2734/92 1992-09-01
PCT/CH1993/000206 WO1994005835A1 (fr) 1992-09-01 1993-08-17 Monofilament antisalissures pour tamis de machine a papier, son procede de fabrication et son application

Publications (2)

Publication Number Publication Date
EP0617743A1 EP0617743A1 (fr) 1994-10-05
EP0617743B1 true EP0617743B1 (fr) 1999-07-14

Family

ID=4240408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93917512A Expired - Lifetime EP0617743B1 (fr) 1992-09-01 1993-08-17 Monofilament antisalissures pour tamis de machine a papier, son procede de fabrication et son application

Country Status (8)

Country Link
US (2) US5472780A (fr)
EP (1) EP0617743B1 (fr)
JP (2) JPH07500884A (fr)
AT (1) ATE182185T1 (fr)
AU (1) AU670313B2 (fr)
CA (1) CA2122372C (fr)
DE (1) DE59309695D1 (fr)
WO (1) WO1994005835A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2135982A2 (fr) 2008-06-18 2009-12-23 Teijin Monofilament Germany Gmbh Monofilaments modifiés à l'aide de perfluoropolyéthers

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08501355A (ja) * 1993-07-02 1996-02-13 ローヌ−プーラン ヴィスコスイス ソシエテ アノニム 防汚性で耐摩耗性のモノフィラメントの製造方法およびその用途
US5407736A (en) * 1993-08-12 1995-04-18 Shakespeare Company Polyester monofilament and paper making fabrics having improved abrasion resistance
US5804659A (en) * 1996-12-18 1998-09-08 Asten, Inc. Processing of polyphthalamide monofilament
US6136437A (en) * 1997-10-07 2000-10-24 Astenjohson, Inc. Industrial fabric and yarn made from an improved fluoropolymer blend
US6146462A (en) * 1998-05-08 2000-11-14 Astenjohnson, Inc. Structures and components thereof having a desired surface characteristic together with methods and apparatuses for producing the same
US20070173585A1 (en) * 2004-12-22 2007-07-26 Sevenich Gregory J Polyester nanocomposite filaments and fiber
DE102010015500A1 (de) 2010-04-20 2011-10-20 Teijin Monofilament Germany Gmbh Monofilamente aus thermoplastischen Polymeren, deren Herstellung und Verwendung
US10759923B2 (en) 2015-10-05 2020-09-01 Albany International Corp. Compositions and methods for improved abrasion resistance of polymeric components

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1241168A (en) * 1967-08-29 1971-07-28 Ici Ltd Polyethylene terephthalate moulding compositions
US3723373A (en) * 1971-10-04 1973-03-27 American Cyanamid Co 0.1% to about 2.0% by weight polytetrafluoroethylene emulsion modified polyethylene terephthalate with improved processing characteristics
US4002581A (en) * 1975-12-08 1977-01-11 General Electric Company Foamed thermoplastic compositions of a linear polyester and an ionically crosslinked copolymer
DE3301270A1 (de) * 1983-01-17 1984-07-19 W.L.Gore & Co GmbH, 8011 Putzbrunn Ummanteltes faser- bzw. filamentmaterial und verfahren zu seiner herstellung
JPS6228822A (ja) * 1985-07-31 1987-02-06 Nec Corp 電源制御装置
JPS62238822A (ja) * 1986-04-07 1987-10-19 Kanebo Ltd 改質ポリエステル繊維
US4822454A (en) * 1986-12-24 1989-04-18 Albany International Corp. Enhanced soil removal from paper machine forming fabrics
EP0506983B1 (fr) * 1990-10-19 1999-06-16 Toray Industries, Inc. Monofil de polyester
CA2087477A1 (fr) * 1992-02-03 1993-08-04 Jennifer A. Gardner Monofilaments de copolyester haute temperature avec resistance sur noeud amelioree pour toile secheuse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2135982A2 (fr) 2008-06-18 2009-12-23 Teijin Monofilament Germany Gmbh Monofilaments modifiés à l'aide de perfluoropolyéthers
DE102008028617A1 (de) 2008-06-18 2009-12-24 Teijin Monofilament Germany Gmbh Mit Perfluorpolyethern modifizierte Monofilamente

Also Published As

Publication number Publication date
AU4696793A (en) 1994-03-29
CA2122372A1 (fr) 1994-03-17
CA2122372C (fr) 2003-03-25
US5472780A (en) 1995-12-05
EP0617743A1 (fr) 1994-10-05
AU670313B2 (en) 1996-07-11
US5514472A (en) 1996-05-07
JP2000000067U (ja) 2000-09-29
DE59309695D1 (de) 1999-08-19
JPH07500884A (ja) 1995-01-26
WO1994005835A1 (fr) 1994-03-17
ATE182185T1 (de) 1999-07-15

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