EP0473430A2 - Gewebe und Filz für Heizpresse aus PEEK fasern - Google Patents

Gewebe und Filz für Heizpresse aus PEEK fasern Download PDF

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Publication number
EP0473430A2
EP0473430A2 EP91307912A EP91307912A EP0473430A2 EP 0473430 A2 EP0473430 A2 EP 0473430A2 EP 91307912 A EP91307912 A EP 91307912A EP 91307912 A EP91307912 A EP 91307912A EP 0473430 A2 EP0473430 A2 EP 0473430A2
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EP
European Patent Office
Prior art keywords
fabric
polyetherketone
peek
fibre
crystallinity
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
Application number
EP91307912A
Other languages
English (en)
French (fr)
Other versions
EP0473430B1 (de
EP0473430A3 (en
Inventor
Robert Bernard Davis
Maryann C. Kenney
Charles Edwin Kramer
Sandra Krohto Barlow
Francis L. Davenport
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
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Publication date
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Application filed by Albany International Corp filed Critical Albany International Corp
Publication of EP0473430A2 publication Critical patent/EP0473430A2/de
Publication of EP0473430A3 publication Critical patent/EP0473430A3/en
Application granted granted Critical
Publication of EP0473430B1 publication Critical patent/EP0473430B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/66—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyethers
    • D01F6/665—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyethers from polyetherketones, e.g. PEEK
    • 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
    • D21F7/083—Multi-layer felts

Definitions

  • This invention relates to fibres and fabric for use in press felts to be employed in a high temperature environment.
  • Typical fibres are materials from the generic classes of polyaramids, polybenzimidazoles, polyetherimides, polysulfones, polyphenylene sulfide, and polyarylates. While all these materials have high temperature use capabilities, most do not possess adequate physical properties to be useful for press fabric applications. Many materials such as polysulfones and polyetherimides are non-crystalline materials which tend to deform under load at temperatures above their glass transition and suffer irreversible deformation upon repeated passage through a press nip. Other materials such as the polyaramids, polybenzimidazoles and polyarylates are semi-crystalline polymers, but are, in general, highly aromatic rigid materials which suffer brittle fracture in a press nip after a relatively few compression cycles.
  • polyetherketones while being semi-crystalline and highly aromatic do not show brittle fracture at ambient or at elevated temperatures, when produced to have a specific fibre morphology.
  • a fabric for a paper making machine which fabric comprises a woven substrate carrying batt fibre on a surface thereof characterised in that at least one of the batt fibre and the substrate comprises a polyetherketone.
  • the present invention also includes a method of manufacturing paper which method comprises forming a furnish of paper making constituents, introducing said furnish as a layer to a dewatering station to dewater said furnish to produce a cohesive sheet and thereafter pressing at an elevated temperature wherein the paper is transported by continuous fabrics and characterised in that the pressing and drying of the sheet in at least part of the process in conducted at a temperature in excess of 100°C and further characterised in that the fabric in at least said part of the process comprises a woven, knitted, braided or nonwoven substrate carrying batt fibre on a surface thereof and where at least one of said batt fibre and said substrate comprises a polyetherketone.
  • the polyetherketone may be a fabric wherein the polyetherketone is selected from one or more of polyetherketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK) and polyetheretherketoneketone (PEEKK).
  • PEK polyetherketone
  • PEEK polyetheretherketone
  • PEKK polyetherketoneketone
  • PEEKK polyetheretherketoneketone
  • the polyetherketone may include an effective proportion of an anti-oxidant therefor.
  • Fibres used in the invention may be made from commercially available polyetherketones such as those commercially available under the trade name "VICTREX PEK” or “VICTREX PEEK” both of which are currently commerically available from ICI Limited and are intended principally as injection molding materials, but they can be extruded into fine fibre or monofilament.
  • polyetherketones maintain a relatively cooler fabric surface temperature after passage through a heated press environment than other materials evaluated and may at the same time provide an enhanced sheet release characteristic.
  • higher fabric temperatures near the sticking point of lignin
  • cooler press fabric surfaces promote ease of sheet release.
  • the polymer molecular weight is high and it has been found that the optimum properties in both the maintenance of molecular weight during extrusion and subsequent use is obtained if a proportion of anti-oxidant is compounded with the resin prior to extrusion.
  • Typical antioxidants suitable for use in the present invention are phenolic antioxidants and/or those based on ⁇ -tocopherol.
  • the fibre morphology for PEEK fibres for the Impulse Drying process requires a moderately drawn fibre with moderate orientation and crystallinity, and should not be at the extremes of low or high orientation and crystallinity, thus providing superior mechanical properties for Impulse Drying. Fibres with either low or high orientation and cystallinity result in more rapid and undesirable mechanical failure, such as flattening and fibrillation.
  • the orientation and the crystallinity lie within 30% to 75%, preferably 40% to 70% of the range between the low and high extremes of each of these properties.
  • the crystallinity of the polyetherketone is within the range of 50 to 65% of the extremes of crystallinity for that particular polyetherketone employed.
  • the polyetherketone may be a PEEK fibre and may have a shrink force at 150°C not greater than 0.20 gpd.
  • polyetherketones may be employed which have at least one yield point below 3.0 gpd.
  • Figure 1 is a photomicrograph of a sample PEEK-h of Example II.
  • Figure 2 is a photomicrograph of a sample PEEK-a of Example II.
  • Figure 3 is a plot of shrink force against temperatures for samples of Example II.
  • Figure 4 is a plot of applied stress against % elongation for samples of Example II.
  • a polyetheretherketone resin commercially available from ICI under the name Victrex PEEK 380G and hereinafter referred to as PEEK-a was extruded and drawn into approximately 17 denier per filament multifilament yarn in a standard melt extrusion spinning operation.
  • the fibre produced had moderate orientation and moderate crystallinity.
  • the fibre was crimped and cut into three inch staple. Fibre properties obtained were 3.1 g/den tenacity, 31% elongation to break and 26 g/den initial modulus. This fibre was carded into a web and needled onto the top surface of a pre-made press fabric. The press fabric was run on a pilot machine press section to assess fibre performance.
  • PEEK-a was a crimped fibre of 15dtex in 80mm staple length manufactured by Hoechst Aktiengesellschaft. Both PEEK-a and PEEK-h were of equivalent molecular weight but different in fibre morphology.
  • a layer of each PEEK fibre was needled onto the surface of the pilot press fabric in separate areas.
  • the fabric was run on a pilot press machine at the following wet pressing conditions:
  • Figure 1 is a photomicrograph of PEEK-h; it can be seen that the fibres have undergone extensive flattening and fibrillation, as a result the dewatering ability of this sample is severely impaired.
  • Figure 2 the sample of PEEK-a shown in Figure 2 after 106compressions, is in a much superior condition; although the fibres have undergone some flattening, the integrity of the fibres remains and the dewatering characteristics of the structure remain intact.
  • Shrink force data further corroborates higher orientation and crystallinity in PEEK-h fibre.
  • the shrink force values thoughout the test are consistently greater for PEEK-h fibre than for PEEK-a fibre.
  • Shrink force data at 80°C and 150°C are shown.
  • the 80°C represents the water temperature used with current wet pressing technology while the 150°C temperature represents a typical Impulse Drying temperature.
  • Figure 3 is a plot of shrink force measured in grammes per denier (gpd) as ordinate against temperature in °C as abscissa. The less oriented nature of the sample PEEK-a can be discerned clearly which compared with PEEK-h by the lower shrink force curve.
  • a needled nonwoven fabric was prepared by needling together successive card web layers of the same PEEK fibre as described in Example I. Each batt of approximately 120 gm/m2 weight was crosslapped at a 90° angle prior to needling. The total fabric product consisted of eight batt layers and was approximately 1000 gm/m2 in weight.
  • An identical fabric was prepared from commercial polyamide 6,6 fibre typical of that used for commercial paper machine clothing fabrics. Each fabric was used in an experiment to dewater a 25% solids paper sheet in an Impulse Drying apparatus similar to that described by Lavery, H.P. in CPAA Annual Meeting preprints, 73B: 121-126 (Jan 29, 1987).
  • the PEEK sample successfully removed water from the paper to high levels of dryness without suffering apparent physical damage.
  • the polyamide sample in the same test fused to an impermeable mass during the initial impact. The temperature of the falling plate was maintained at 300°C, peak pressure was 600 psi and equivalent nip residence time was 4.5 ms.
  • PEEK-i A sample of another PEEK fibre, spun from a commercially available resin, was evaluated on a pilot Impulse Drying machine.
  • This PEEK fibre designated PEEK-i is produced by ICI under the trade name ZYEX with a 13.3 dtex and 80 mm fibre length, and was spun to a similar fibre morphology as PEEK-a (moderate orientation and crystallinity).
  • the PEEK-i was part of a multi-candidate pilot fabric evaluation.
  • press roll temperatures as high as 205°C were tried. At this temperature, PEEK-i sample had excellent temperature resistance and sheet handling ability with acceptable dewatering performance.
  • Fibre U13 aromatic aliphatic polyamide resin which was spun into a fibre sample called Fibre U13 which is a fibre spun (at AIRESCO) from BASF Ultramid T resin Grade KR4351, and a metaphenylene isothalamid called BXC.
  • PEEK-i, U13 and BXC were all high temperature materials, Fibres U13 and BXC had poor sheet handling properties. Fibres U13 and BXC surfaces were extremely tacky and did not release the paper sheet after passing through the heated press nip. PEEK-i had excellent sheet release properties.
  • PEEK-i sample was evaluated on another Impulse Drying pilot paper machine which includes a heated long nip press.
  • the PEEK-i fibre was prepared into a pilot size needled fabric and evaluated on the pilot machine at roll temperatures as high as 202°C, machine speeds as high as 2000 fpm and roll pressures as high as 6700 pl.
  • the PEEK-i fabric had excellent sheet release properties and good dewatering performance.
  • the surface temperature of the fabric which was measured throughout the trial remained relatively low. We believe maintenance of a low fabric surface temperature is critical for good sheet release.
  • Other fibres evaluated on the same equipment which did not release the paper sheet were either extremely tacky or were measured to have a "hotter" fabric surface temperature.
  • the post nip fabric surface temperature of PEEK-i was approximately 60°C; this was favourable when compared with another fabric candidate, having a sheet contacting surface of polytetrafluorethylene (PTFE) which experienced sheet release problems, and had a post nip fabric surface temperature of approximately 93°C.
  • PTFE polytetrafluorethylene

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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Artificial Filaments (AREA)
  • Filtering Materials (AREA)
  • Woven Fabrics (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Organic Insulating Materials (AREA)
  • External Artificial Organs (AREA)
  • Secondary Cells (AREA)
EP91307912A 1990-08-31 1991-08-29 Gewebe und Filz für Heizpresse aus PEEK fasern Revoked EP0473430B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9018987 1990-08-31
GB909018987A GB9018987D0 (en) 1990-08-31 1990-08-31 Peek hot press felts and fabrics

Publications (3)

Publication Number Publication Date
EP0473430A2 true EP0473430A2 (de) 1992-03-04
EP0473430A3 EP0473430A3 (en) 1993-01-20
EP0473430B1 EP0473430B1 (de) 1996-03-20

Family

ID=10681414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91307912A Revoked EP0473430B1 (de) 1990-08-31 1991-08-29 Gewebe und Filz für Heizpresse aus PEEK fasern

Country Status (12)

Country Link
EP (1) EP0473430B1 (de)
JP (1) JP3005345B2 (de)
AT (1) ATE135756T1 (de)
AU (1) AU651841B2 (de)
BR (1) BR9103768A (de)
CA (1) CA2049585C (de)
DE (1) DE69118054T2 (de)
ES (1) ES2085968T3 (de)
FI (1) FI914102L (de)
GB (1) GB9018987D0 (de)
MX (1) MX9100888A (de)
NO (1) NO913376L (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529506A1 (de) * 1991-08-23 1993-03-03 Ems-Inventa Ag Papiermaschinenfilze und Verfahren zur Herstellung derselben
GB2309712A (en) * 1996-02-05 1997-08-06 Shell Int Research Papermachine clothing woven from aliphatic polyketone fibres
US6207276B1 (en) 1998-11-26 2001-03-27 Ems-Chemie Ag Sheath-core bicomponent fiber and its applications
US7014733B2 (en) 2002-05-14 2006-03-21 Stowe Woodward L.L.C. Belt for shoe press and shoe calender and method for forming same
WO2010107976A1 (en) 2009-03-20 2010-09-23 Arkema Inc. Polyetherketoneketone nonwoven mats
CN114454527A (zh) * 2022-02-11 2022-05-10 宁波琳晓生物科技有限公司 一种超低收缩温度peek热缩管生产设备及其使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2671139T3 (es) * 2009-02-02 2018-06-05 Arkema Inc. Fibras de alto rendimiento

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359501A (en) * 1981-10-28 1982-11-16 Albany International Corp. Hydrolysis resistant polyaryletherketone fabric
JPS61171754A (ja) * 1985-11-09 1986-08-02 Kanegafuchi Chem Ind Co Ltd ビニル系樹脂組成物
JPS62231016A (ja) * 1986-03-28 1987-10-09 Teijin Ltd ポリ（アリ−ルエ−テルケトン）繊維の製造法
GB8709067D0 (en) * 1987-04-15 1987-05-20 Albany Int Corp Monofilaments
GB8827789D0 (en) * 1988-11-28 1988-12-29 Albany Research Uk Paper machine felts
US4896702A (en) * 1988-12-01 1990-01-30 Niagara Lockport Industries Inc. Seam construction for papermaking fabrics

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529506A1 (de) * 1991-08-23 1993-03-03 Ems-Inventa Ag Papiermaschinenfilze und Verfahren zur Herstellung derselben
AU656792B2 (en) * 1991-08-23 1995-02-16 Ems-Inventa Ag Paper machine felt and method for the manufacture thereof
GB2309712A (en) * 1996-02-05 1997-08-06 Shell Int Research Papermachine clothing woven from aliphatic polyketone fibres
US6207276B1 (en) 1998-11-26 2001-03-27 Ems-Chemie Ag Sheath-core bicomponent fiber and its applications
US7014733B2 (en) 2002-05-14 2006-03-21 Stowe Woodward L.L.C. Belt for shoe press and shoe calender and method for forming same
WO2010107976A1 (en) 2009-03-20 2010-09-23 Arkema Inc. Polyetherketoneketone nonwoven mats
EP2408830A4 (de) * 2009-03-20 2013-03-27 Arkema Inc Polyetherketonketon-vliesmatten
US9422654B2 (en) 2009-03-20 2016-08-23 Arkema Inc. Polyetherketoneketone nonwoven mats
CN114454527A (zh) * 2022-02-11 2022-05-10 宁波琳晓生物科技有限公司 一种超低收缩温度peek热缩管生产设备及其使用方法

Also Published As

Publication number Publication date
MX9100888A (es) 1992-04-01
FI914102A7 (fi) 1992-03-01
EP0473430B1 (de) 1996-03-20
DE69118054D1 (de) 1996-04-25
JPH0673684A (ja) 1994-03-15
CA2049585A1 (en) 1992-03-01
DE69118054T2 (de) 1996-09-12
JP3005345B2 (ja) 2000-01-31
EP0473430A3 (en) 1993-01-20
GB9018987D0 (en) 1990-10-17
ATE135756T1 (de) 1996-04-15
CA2049585C (en) 1995-03-28
FI914102L (fi) 1992-03-01
AU651841B2 (en) 1994-08-04
ES2085968T3 (es) 1996-06-16
BR9103768A (pt) 1992-05-19
NO913376D0 (no) 1991-08-28
FI914102A0 (fi) 1991-08-30
AU8340091A (en) 1992-03-05
NO913376L (no) 1992-03-02

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