EP0617743A1 - Schmutzabweisendes monofilament fuer papiermaschinensiebe, verfahren zu dessen herstellung und verwendung - Google Patents
Schmutzabweisendes monofilament fuer papiermaschinensiebe, verfahren zu dessen herstellung und verwendungInfo
- Publication number
- EP0617743A1 EP0617743A1 EP93917512A EP93917512A EP0617743A1 EP 0617743 A1 EP0617743 A1 EP 0617743A1 EP 93917512 A EP93917512 A EP 93917512A EP 93917512 A EP93917512 A EP 93917512A EP 0617743 A1 EP0617743 A1 EP 0617743A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- monofilament
- dirt
- repellent
- copolymer
- 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.)
- Granted
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
- D01F6/92—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 a diameter of 0.2 to 0.7 mm made of at least 85% by weight of polyethylene terephthalate with a viscosity index (VI) of at least 96 dl / g and a copolymer, process for the preparation and its use .
- VI viscosity index
- Dispos-repellent properties for paper machine screens are understood to mean wet soiling, which also requires resistance to hydrolysis.
- the dirt repellency is intended to extend the cleaning cycles of a sieve, the cleaning work being carried out under a high-pressure water jet and, if necessary, with a brush.
- Dirt-repellent monofilaments which should at the same time be resistant to hydrolysis, are processed into technical fabrics and used in particular in the dryer section of a paper machine. Such dryer fabrics are exposed to temperatures well above 100 ° C and moisture as well as when cleaning increased mechanical stress. Dirt-repellent polyester monofilaments have not proven themselves due to their susceptibility to hydrolysis.
- a further improvement in the resistance to hydrolysis was achieved by adding additives in the form of stabilizers. which, however, is still not sufficient for paper machine fabric de dryer section.
- attempts were also made to increase the dirt-repellent properties by means of suitable spin finishes, finish treatments on the filament and aftertreatment on the fabric.
- Monofilaments have also been produced from the copolyme ethylene tetrafluoroethylene, the thermal and chemical resistance of which are excellent and are therefore used in chemical process engineering.
- E dryer fabrics for paper machines are known which carry such monofilaments on the surface of the screen and protect the underlying support fabric made of polyester monofilaments against soiling.
- the chemical properties of the fluoropolymers are characterized by their inadequate tensile strength and elongation properties.
- the production and disposal of a fluoropolymer with approximately 50% fluorine content compared to a polyester is very complex.
- the object of the invention is to provide a dirt-repellent monofilament that the high
- Claims of a technical fabric in relation to its chemical, dirt-repellent, mechanical and abrasion-resistant properties are sufficient and are particularly used in the dryer section of a paper machine screen.
- Another object of the invention is to provide a method which allows the economical production of dirt-repellent monofilaments.
- the monofilament contains 1.5 to 5% by weight of a polynary copolymer made from alkenes and perfluoroalkenes.
- polyester which consists of at least 85% by weight of polyethylene terephthalate. It should be emphasized as a particular advantage that the monofilament produced has a homogeneous composition over the entire cross section. If necessary, 1 to 3% of color pigments can also be mixed into the melt.
- Suitable polyethylene terephthalate is one which has a viscosity index of> 96.
- copolymer those consisting of about 50% by weight of ethene and about 50% by weight of tetrafluoroethylene have proven successful.
- the copolymer can be added to the melt in the form of a masterbatch consisting of about 50% by weight and about 50% by weight of the copolymer.
- a soil-repellent monofilaments in particular, those have proven having a diameter of 0.2 to 0.7 mm, which, from 'a polymer blend of polyethylene terephthalate with at least 85 wt .-% of polyethylene terephthalate units and 1.5 to 5 wt .-% in particular 1.5 to 3.0% by weight of a polynary copolymer made from alkenes and perfluoroalkenes.
- Binary systems have proven particularly useful as polynary copolymers. These can be obtained simply by copolymerizing the individual components. Copolymers of ethene and tetrafluoroethene are advantageous because of their ready availability, a melting point in the range between 255 ° C. and 275 ° C. being particularly expedient. Other binary or polynary fluoroplastics such as hexafluoropropylene-modified polytetrafluorethylene, polyvinylidene fluoride and others. can be used.
- the monofilament contains 1.5 to 5% by weight of the copolymers mentioned with polyfluoroalkylene units, preferably 1.5 to 3% by weight, in particular 2 to 3% by weight.
- the tenacity 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, the surprising feature being that dirt repellency is particularly good.
- the dirt repellency was determined as the soiling index with ⁇ 2 after 5 soiling / wash-out cycles, compared to> 5 for a polyester filament without copolymers.
- the use of the dirt-repellent monofilaments according to the invention with a diameter of 0.2 to 0.7 mm is particularly suitable for the production of paper machine screen fabrics.
- V 96 Hydrolysis-stabilized, highly viscous polyethylene terephthalate is melt-extruded in a known manner at a temperature of 290 ° C. through a spinneret with a hole diameter of 1.8 mm and a throughput of 486 g / min.
- the extruded monofilaments are cooled in a water bath at 70 ° C. After cooling, the monofilaments are spin-prepared and drawn at a draw ratio of 5.25x, relaxed and wound up at a speed of 100 m / min.
- VI 96 Highly viscous (VI 96) polyethylene terephthalate (polyester) is melted at a temperature of 290 ° C. 4% by weight of the mixture (masterbatch), corresponding to 2% by weight of copolymer (II), is added to the melt by means of a metering device.
- the extrusion is carried out via a spinneret with a hole diameter of 1.8 mm and also with a throughput of 486 g / min.
- the extruded monofilaments are cooled in the same way in a water bath at 70 ° C. After cooling, the monofilaments are spin-treated and with a Draw ratio of a total of 5.25 times drawn, relaxed and wound up at a speed of 100 m / min.
- the resulting thread with a diameter of 0.50 mm has a soiling index of less than 2 ( ⁇ 2) after 5 treatments, a strength (Ft) of 37 cN / tex at an elongation (Dt) of 39% and a thermal shrinkage (TS at 160 ° C) of 0.4%, based on the unshrunk thread.
- AI - [DL *] / L * 0 x 100
- L * Q means the brightness of the reference.
- the AI values shown in Figure 1 show the influence of the successive cycles "soiling" R / "washing out” + W. AI mean values of two cartels after soiling and after washing are shown.
- Curve 1 shows the monofilament thread according to the invention.
- Curve 2 shows a comparison thread made of polyester according to the prior art, that is to say without (II). After (five) 5 soiling / washout cycles, indices below 2 are achieved with the monofilament according to the invention.
- the monofilament thread according to the invention brings an improvement by a factor of 4 to 5 compared to the prior art. It is preferably suitable for use in paper machine fabrics.
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH273492 | 1992-09-01 | ||
CH2734/92 | 1992-09-01 | ||
CH273492 | 1992-09-01 | ||
PCT/CH1993/000206 WO1994005835A1 (de) | 1992-09-01 | 1993-08-17 | Schmutzabweisendes monofilament für papiermaschinensiebe, verfahren zu dessen herstellung und verwendung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0617743A1 true EP0617743A1 (de) | 1994-10-05 |
EP0617743B1 EP0617743B1 (de) | 1999-07-14 |
Family
ID=4240408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93917512A Expired - Lifetime EP0617743B1 (de) | 1992-09-01 | 1993-08-17 | Schmutzabweisendes monofilament fuer papiermaschinensiebe, verfahren zu dessen herstellung und verwendung |
Country Status (8)
Country | Link |
---|---|
US (2) | US5472780A (de) |
EP (1) | EP0617743B1 (de) |
JP (2) | JPH07500884A (de) |
AT (1) | ATE182185T1 (de) |
AU (1) | AU670313B2 (de) |
CA (1) | CA2122372C (de) |
DE (1) | DE59309695D1 (de) |
WO (1) | WO1994005835A1 (de) |
Families Citing this family (9)
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 |
DE102008028617A1 (de) | 2008-06-18 | 2009-12-24 | Teijin Monofilament Germany Gmbh | Mit Perfluorpolyethern modifizierte Monofilamente |
DE102010015500A1 (de) | 2010-04-20 | 2011-10-20 | Teijin Monofilament Germany Gmbh | Monofilamente aus thermoplastischen Polymeren, deren Herstellung und Verwendung |
BR112018001714B1 (pt) | 2015-10-05 | 2022-08-02 | Albany International Corp | Composições e métodos para resistência à abrasão melhorada de componentes poliméricos |
Family Cites Families (9)
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 (de) * | 1990-10-19 | 1999-06-16 | Toray Industries, Inc. | Polyester monofilament |
CA2087477A1 (en) * | 1992-02-03 | 1993-08-04 | Jennifer A. Gardner | High temperature copolyester monofilaments with enhanced knot tenacity for dryer fabrics |
-
1990
- 1990-08-17 US US08/240,664 patent/US5472780A/en not_active Expired - Fee Related
-
1993
- 1993-08-17 AU AU46967/93A patent/AU670313B2/en not_active Ceased
- 1993-08-17 DE DE59309695T patent/DE59309695D1/de not_active Expired - Fee Related
- 1993-08-17 CA CA002122372A patent/CA2122372C/en not_active Expired - Fee Related
- 1993-08-17 JP JP6506719A patent/JPH07500884A/ja active Pending
- 1993-08-17 WO PCT/CH1993/000206 patent/WO1994005835A1/de active IP Right Grant
- 1993-08-17 AT AT93917512T patent/ATE182185T1/de not_active IP Right Cessation
- 1993-08-17 EP EP93917512A patent/EP0617743B1/de not_active Expired - Lifetime
-
1995
- 1995-08-10 US US08/513,530 patent/US5514472A/en not_active Expired - Fee Related
-
2000
- 2000-03-17 JP JP2000001614U patent/JP2000000067U/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9405835A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU670313B2 (en) | 1996-07-11 |
EP0617743B1 (de) | 1999-07-14 |
JPH07500884A (ja) | 1995-01-26 |
CA2122372C (en) | 2003-03-25 |
WO1994005835A1 (de) | 1994-03-17 |
DE59309695D1 (de) | 1999-08-19 |
AU4696793A (en) | 1994-03-29 |
ATE182185T1 (de) | 1999-07-15 |
US5472780A (en) | 1995-12-05 |
CA2122372A1 (en) | 1994-03-17 |
JP2000000067U (ja) | 2000-09-29 |
US5514472A (en) | 1996-05-07 |
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