EP0407887B1 - Monofil de sulfure de polyphénylène pour toile de machine à papier - Google Patents

Monofil de sulfure de polyphénylène pour toile de machine à papier Download PDF

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Publication number
EP0407887B1
EP0407887B1 EP90112817A EP90112817A EP0407887B1 EP 0407887 B1 EP0407887 B1 EP 0407887B1 EP 90112817 A EP90112817 A EP 90112817A EP 90112817 A EP90112817 A EP 90112817A EP 0407887 B1 EP0407887 B1 EP 0407887B1
Authority
EP
European Patent Office
Prior art keywords
polyphenylene sulfide
fiber
molecular weight
melt flow
flow index
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
EP90112817A
Other languages
German (de)
English (en)
Other versions
EP0407887A3 (en
EP0407887A2 (fr
Inventor
Gerhard Dr. Freitag
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of EP0407887A2 publication Critical patent/EP0407887A2/fr
Publication of EP0407887A3 publication Critical patent/EP0407887A3/de
Application granted granted Critical
Publication of EP0407887B1 publication Critical patent/EP0407887B1/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
    • D01F6/94—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 other polycondensation products
    • 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

Definitions

  • the invention relates to a fiber, in particular a monofilament for paper machine screens, which is or is made of polyphenylene sulfide and is stretched.
  • Such a monofilament is known from EP patent applications 161 579, 221 691 and 292 186. These patents consistently emphasize that monofilaments consisting exclusively of polyphenylene sulfide are very brittle and are therefore unsuitable for many applications, for example as monofilaments for paper machine screens. Mixtures of polyphenylene sulfide and other polymers, such as polyamides or polyolefins, are therefore described in these patent applications.
  • the invention has for its object to provide a fiber, in particular a monofilament for paper machine screens, which or which consists exclusively of polyphenylene sulfide and yet has a high longitudinal strength and maximum knot tensile strength.
  • the polyphenylene sulfide is a mixture of 60 to 90 percent by weight of a high molecular weight polyphenylene sulfide with a melt flow index value of at most 100, preferably at most 50 and 10-40 percent by weight of a low molecular weight polyphenylene sulfide with a melt flow -Index value of at least 120, preferably at least 140.
  • the melt flow index is in g / 10 min. measured, namely with a Zwick rheometer at 315 ° C and a stamp load of 5 kg, a nozzle bore diameter of 2.095nm and a nozzle bore length of 8mm.
  • high molecular weight (i.e. highly viscous) polyphenylene sulfide leads to fibers with high longitudinal strength but low maximum knot tensile strength (transverse strength), whereas fibers made from low molecular weight (low viscosity) polyphenylene sulfide have low longitudinal strength, while the maximum knot tensile strength is relatively large.
  • EP 237 006 A2 From EP 237 006 A2 it is already known that a mixture of two polyphenylene sulfides of different molecular weights, i.e. a bimodal molecular weight distribution, should lead to an increase in the crystallization temperature and to an improvement in the rigidity, the flexural strength and the ball compressive strength compared to a polymer of the same melt viscosity.
  • EP 237 006 A2 is primarily concerned with plastic for three-dimensional isotropic injection molded parts.
  • the fiber designed according to the invention thus consists exclusively of polyphenylene sulfide, i.e. it contains no other fiber-forming polymer material, so that the advantageous properties of this polymer are fully retained.
  • additions of antioxidants, pigments, dyes or similar additives used for the production of synthetic fibers can be used.
  • the draw ratio is preferably 3: 1 to 5: 1, that is to say that the fiber should largely be drawn to a maximum.
  • the maximum tensile strength stretch is then usually between 30 and 40%.
  • the fiber designed according to the invention expediently has a fineness-related maximum tensile strength above 25 cN / tex and a knot maximum tensile strength (DIN 53 842, Part 1) of at least 60% of this value.
  • the fiber can be both a multifilament and a staple fiber.
  • the use of the invention is particularly advantageous for monofilaments, in particular for paper machine screens.
  • the preferred diameter range of the monofilaments is 0.1 to 1 mm, in particular 0.2 to 1 mm, although the invention can also be used for monofilaments outside this diameter range (with a lower and upper diameter limit of approximately 20 ⁇ m and 3 mm.
  • a monofilament with a diameter of 0.40 mm was produced from a high molecular weight polyphenylene sulfide with a MeltFlow index value of 31, which has a fineness-related maximum tensile strength of 32 cN / tex, a maximum tensile strength elongation of 35% and a relative maximum knot tensile force of 54%.
  • a monofilament with a diameter of 0.40 mm was produced from a low molecular weight polyphenylene sulfide with a melt flow index value of 149, which had a fineness-related maximum tensile strength of 18 cN / tex, a maximum tensile strength elongation of 31% and a relative maximum knot tensile strength of 94% owns.
  • a monofilament with a diameter of 0.40 mm was produced from a mixture of 70 percent by weight of the polyphenylene sulfide according to Example 1 and 30 percent by weight of the polyphenylene sulfide according to Example 2.
  • the melt flow index value of this mixture is 69.
  • the monofilament has a fineness-related maximum tensile strength of 30 cN / tex, a maximum tensile strength elongation of 35% and a relative maximum knot tensile force of 71%.
  • a 0.40mm diameter monofilament was made from a mixture of 80 percent by weight of a high molecular weight polyphenylene sulfide with a melt flow index value of 31 and 20 percent by weight of a low molecular weight polyphenylene sulfide with a melt flow index value of 149.
  • For the monofilament there was a fineness-related maximum tensile strength of 30 cN / tex, a maximum tensile strength elongation of 32% and a relative maximum knot tensile force of 63%.
  • the monofilaments were produced in such a way that they were spun by extrusion of the polyphenylene sulfide or the polyphenylene sulfide mixtures at a temperature of 275-310.degree. C., the spun monofilaments at a temperature of 90-200.degree. C. with a draw ratio of 311 to 5: 1 stretched in one or two stages, the stretched monofilaments were heat-set at a temperature of 180 to 260 ° C with a shrinkage of up to 10%.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Paper (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Woven Fabrics (AREA)
  • Multicomponent Fibers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (6)

  1. Fibre, en particulier monofil pour toile pour machine à papier,laquelle ou bien lequel étant constitué de poly(sulfure de phénylène) ou étant étiré à partir de ce dernier, caractérisée en ce que le poly(sulfure de phénylène) est un mélange de deux poly(sulfures de phénylène) et est constituée de 60 à 90 % en poids d'un poly(sulfure de phénylène) à grande masse moléculaire, ayant un indice de fluidité au plus égal à 100, et de 10 à 40 % en poids d'un poly(sulfure de phénylène) à faible masse moléculaire, ayant un indice de fluidité d'au moins 120, et que la force de traction maximale, rapportée au titre, est supérieure à 25 cN/tex, et que la force de traction maximale au noeud est d'au moins 60 % de cette valeur, où l'indice de fluidité, en g/10 min, est mesuré à l'aide d'un Zwick-rhéomètre à pince à 315 °C, pour une charge de poinçon de 5 kg, un diamètre du trou de buse de 2,095 mm et une longueur du trou de buse de 8 mm.
  2. Fibre selon la revendication 1, caractérisée en ce que l'indice de fluidité du poly(sulfure de phénylène) à grande masse moléculaire est au plus égal à 50.
  3. Fibre selon la revendication 2, caractérisée en ce que l'indice de fluidité du poly(sulfure de phénylène) à faible masse moléculaire est d'au moins 140.
  4. Fibre selon au moins l'une des revendications précédentes, caractérisée en ce que le rapport d'étirage de la fibre est de 3:1 à 5:1.
  5. Fibre selon au moins l'une des revendications précédentes, caractérisée en ce que la fibre est thermofixée à une température de 180 à 260°C, en autorisant un retrait allant jusqu'à 10 %.
  6. Fibre selon au moins l'une des revendications précédentes, caractérisée en ce que le diamètre est de 0,1 mm à 1 mm.
EP90112817A 1989-07-08 1990-07-05 Monofil de sulfure de polyphénylène pour toile de machine à papier Expired - Lifetime EP0407887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922501A DE3922501A1 (de) 1989-07-08 1989-07-08 Polyphenylensulfid-monofil fuer papiermaschinensiebe
DE3922501 1989-07-08

Publications (3)

Publication Number Publication Date
EP0407887A2 EP0407887A2 (fr) 1991-01-16
EP0407887A3 EP0407887A3 (en) 1991-10-16
EP0407887B1 true EP0407887B1 (fr) 1996-01-17

Family

ID=6384567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112817A Expired - Lifetime EP0407887B1 (fr) 1989-07-08 1990-07-05 Monofil de sulfure de polyphénylène pour toile de machine à papier

Country Status (8)

Country Link
EP (1) EP0407887B1 (fr)
JP (1) JPH0345711A (fr)
AT (1) ATE133211T1 (fr)
BR (1) BR9003185A (fr)
DE (2) DE3922501A1 (fr)
DK (1) DK0407887T3 (fr)
ES (1) ES2083402T3 (fr)
GR (1) GR3018828T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162151A (en) * 1991-01-23 1992-11-10 Hoechst Celanese Corporation Polyphenylene sulfide monofilaments and fabrics therefrom
US6093319A (en) * 1998-12-18 2000-07-25 Phillips Petroleum Company Poly (arylene sulfide) compositions and manufactures
US6769535B2 (en) * 2002-11-07 2004-08-03 Albany International Corp. High drainage dimensionallally stable brownstock washer belt design

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61176658A (ja) * 1985-01-31 1986-08-08 Kureha Chem Ind Co Ltd フエニレンスルフイド樹脂組成物
JPS62240359A (ja) * 1986-03-11 1987-10-21 Kureha Chem Ind Co Ltd ポリアリ−レンチオエ−テル組成物
JPH0830283B2 (ja) * 1986-06-16 1996-03-27 東レ株式会社 ポリフェニレンサルファイドモノフィラメントの製造方法

Also Published As

Publication number Publication date
ES2083402T3 (es) 1996-04-16
DK0407887T3 (da) 1996-05-20
EP0407887A3 (en) 1991-10-16
GR3018828T3 (en) 1996-04-30
ATE133211T1 (de) 1996-02-15
JPH0345711A (ja) 1991-02-27
DE59010063D1 (de) 1996-02-29
BR9003185A (pt) 1991-08-27
EP0407887A2 (fr) 1991-01-16
DE3922501A1 (de) 1991-01-17

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