EP0185108A1 - Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé - Google Patents

Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé Download PDF

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Publication number
EP0185108A1
EP0185108A1 EP19840115692 EP84115692A EP0185108A1 EP 0185108 A1 EP0185108 A1 EP 0185108A1 EP 19840115692 EP19840115692 EP 19840115692 EP 84115692 A EP84115692 A EP 84115692A EP 0185108 A1 EP0185108 A1 EP 0185108A1
Authority
EP
European Patent Office
Prior art keywords
threads
longitudinal
fabric according
press
carrier
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
EP19840115692
Other languages
German (de)
English (en)
Other versions
EP0185108B1 (fr
Inventor
Fritz Vöhringer
Bernhard Dr. Krenkel
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.)
F Oberdorfer & Co KG Industriegewebe-Techni GmbH
Original Assignee
OBERDORFER F
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
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 OBERDORFER F, F Oberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical OBERDORFER F
Priority to DE8484115692T priority Critical patent/DE3473778D1/de
Priority to EP84115692A priority patent/EP0185108B1/fr
Priority to AT84115692T priority patent/ATE36877T1/de
Publication of EP0185108A1 publication Critical patent/EP0185108A1/fr
Application granted granted Critical
Publication of EP0185108B1 publication Critical patent/EP0185108B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F1/0036—Multi-layer screen-cloths

Definitions

  • the invention relates to carrier fabrics for the production of coated, in particular PUR (polyurethane) coated, press belts, consisting of a set of longitudinal threads and at least one set of transverse threads, for use in wide-nip presses.
  • PUR polyurethane
  • Endless, preferably PUR-coated fabric tapes are used in wide-nip presses in the press section of modern paper machines.
  • the press nip is formed by a concave press shoe and a counter roll, the coated side of the fabric belt sliding on a lubricating film over the press shoe and the fabric side resting on a felt.
  • This arrangement of press shoe, fabric tape, felt and roller creates an extended press zone through which the dry content of the paper web is increased considerably. This creates an ent speaking increases the production speed of the paper machine.
  • the object of the invention is therefore to provide a carrier fabric of the type mentioned, which meets the requirements with regard to wear resistance, pressure distribution, longitudinal stability and resistance to flexing to a greater extent than the known carrier fabrics of the type mentioned (DE-OS 32 31 039 , DE-OS 32 35 468, DE-OS 32 24 760, DE-GM 83 19 684).
  • this object is achieved in that successive longitudinal threads form, at least on one side of the fabric, side-by-side offsets, so-called double offsets, which are guided over the same transverse threads.
  • This structure of the carrier fabric ensures that the inward pressure of the double cranks is so great that, even when using very thick transverse or weft threads, the longitudinal cranks are at least lower on one side of the fabric than the transverse cranks, thereby removing wear are.
  • This effect is also achieved with very thin longitudinal threads with a high weave density. This gives the carrier tape a pronounced flexibility in the direction of travel with good longitudinal stability given.
  • high weft thread densities and thus a high number of supporting points or number of weft cranks per unit area are achieved, which lead to a uniform pressure distribution on the carrier fabric.
  • part of the longitudinal threads can be made of very longitudinally stable material, the other part of highly wear-resistant material.
  • the diameter of at least some of the transverse threads being expediently chosen to be at least 25% larger than the diameter of the longitudinal threads, and the diameter of at least some of the longitudinal threads again by at least Can be 25% larger than the diameter of the other longitudinal threads.
  • a value of at least 40 / cm 2 has proven to be suitable for the number of wearable crankings on the fabric side facing the felt, but much higher values of up to about 160 / cm 2 have proven particularly useful.
  • 1 to 3 of the carrier fabric for the production of PUR-coated press belts have successive longitudinal or warp threads 11, 12, 13, which lie side by side on one side of the fabric and have the same cross or weft threads 18, 19, 20 guided cranks, so-called double cranks, form.
  • these offsets are arranged irregularly in order to avoid the formation of diagonals, which, in interaction with diagonals of the felt, which slides together with the carrier fabric over the press shoe of a wide-nip press, cause a strong lateral run of the Can cause PUR-coated tape.
  • the inward pressure caused by the press shoe of the double cranks shown is so great that, even when using very thick transverse threads 18, 19, 20, the longitudinal cranks come to lie at least on one side of the fabric deeper than the cross cranks, so that they do not Wear are removed.
  • This effect is also with very thin longitudinal threads with high weave density achieved. This ensures a pronounced bending flexibility of the press belt in the running direction with good longitudinal stability.
  • FIG. 4A and 4B are the press felt (FIG. 4A) and the PUR-coated side facing the press shoe (FIG. 4B) of a press belt according to the invention, which has two layers of transverse threads 21, 22 contains that form opposite levels.
  • the double cranks 14 are a layer of very thick transverse threads which form an upstream wear plane facing the felt of the press. At least some of these cross threads are made of a highly wear-resistant material, for example a polyamide, while the other longitudinal and cross threads can be made of polyester.
  • the diameter of at least some of the longitudinal threads 14 can be at least 25% larger than that of the other longitudinal threads, while the number of wearable crankings on the backing fabric side facing the press can be up to over 160 / cm 2 , but at least 40 / cm 2 . In this way, the diameter and number / cm 2 of the longitudinal threads can be determined so that there is sufficient longitudinal stability.
  • the cross thread layer of the carrier fabric facing the press shoe and carrying the coating, together with the likewise thin longitudinal threads, forms a wide-meshed surface into which the coating material can easily penetrate, while the wear side facing the felt is very densely woven, so that the flow of the coating material during coating is stopped.
  • 5A and 5B show a particularly longitudinally stable and at the same time wear-resistant embodiment of the carrier fabric according to the invention.
  • every second has a relatively small diameter and is made of polyester or another extremely longitudinally stable and tear-resistant material, for example Kevlar or steel.
  • the other longitudinal threads 17 are made of highly wear-resistant material, for example polyamide, as are the transverse threads 23 facing the felt and have a diameter similar to this.
  • the longitudinal cranks made of tear-resistant material are pulled deep into the carrier fabric due to the low elongation of such materials and are therefore not exposed to wear. This ensures a longitudinal stability of the coated strip that is independent of wear.
  • the cross threads 24 on the coating side can be multifilaments in order to additionally improve the connection between the fabric and the coating. Furthermore, it has proven useful to choose at least six for the number of longitudinal threads in the repeat.
  • any other suitable coating made of polymer material or rubber can also be used to create a carrier fabric of the type according to the invention.

Landscapes

  • Woven Fabrics (AREA)
  • Paper (AREA)
  • Belt Conveyors (AREA)
EP84115692A 1984-12-18 1984-12-18 Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé Expired EP0185108B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8484115692T DE3473778D1 (en) 1984-12-18 1984-12-18 Coated press belts for use in an extended nip press
EP84115692A EP0185108B1 (fr) 1984-12-18 1984-12-18 Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé
AT84115692T ATE36877T1 (de) 1984-12-18 1984-12-18 Beschichtete pressbaender fuer den einsatz in breit-nip-pressen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84115692A EP0185108B1 (fr) 1984-12-18 1984-12-18 Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé

Publications (2)

Publication Number Publication Date
EP0185108A1 true EP0185108A1 (fr) 1986-06-25
EP0185108B1 EP0185108B1 (fr) 1988-08-31

Family

ID=8192363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115692A Expired EP0185108B1 (fr) 1984-12-18 1984-12-18 Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé

Country Status (3)

Country Link
EP (1) EP0185108B1 (fr)
AT (1) ATE36877T1 (fr)
DE (1) DE3473778D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914534C1 (fr) * 1989-05-02 1990-10-18 Thomas Josef Heimbach Gmbh & Co, 5160 Dueren, De
DE3914533A1 (de) * 1989-05-02 1990-11-08 Heimbach Gmbh Thomas Josef Band fuer papiermaschinen
DE4020589A1 (de) * 1990-06-28 1992-01-09 Oberdorfer Fa F Beschichtetes, flexibles, undurchlaessiges pressband fuer den einsatz in breit-nip-pressen
EP1927695A4 (fr) * 2005-09-22 2008-10-08 Ichikawa Co Ltd Courroie pour presse à sabot
US20120276166A1 (en) * 2009-12-18 2012-11-01 Mitsubishi Tanabe Pharma Corporation Elution-stabilized preparation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080686A1 (fr) * 1981-11-23 1983-06-08 Hermann Wangner GmbH & Co. KG Tissu à couche double servant de Fourdrinier pour machines à papier
EP0085363A1 (fr) * 1982-01-22 1983-08-10 Huyck Corporation Toile de machine à papier
EP0098502A2 (fr) * 1982-07-02 1984-01-18 Thomas Josef Heimbach GmbH & Co. Bande pour l'usage des presses humides des machines à papier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080686A1 (fr) * 1981-11-23 1983-06-08 Hermann Wangner GmbH & Co. KG Tissu à couche double servant de Fourdrinier pour machines à papier
EP0085363A1 (fr) * 1982-01-22 1983-08-10 Huyck Corporation Toile de machine à papier
EP0098502A2 (fr) * 1982-07-02 1984-01-18 Thomas Josef Heimbach GmbH & Co. Bande pour l'usage des presses humides des machines à papier

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914534C1 (fr) * 1989-05-02 1990-10-18 Thomas Josef Heimbach Gmbh & Co, 5160 Dueren, De
DE3914533A1 (de) * 1989-05-02 1990-11-08 Heimbach Gmbh Thomas Josef Band fuer papiermaschinen
US5175037A (en) * 1989-05-02 1992-12-29 Thomas Josef Heimbach Gmbh & Co. Belt for papermaking machines
US5178937A (en) * 1989-05-02 1993-01-12 Thomas Josef Heimbach Gmbh & Co. Belt for papermaking machines
DE4020589A1 (de) * 1990-06-28 1992-01-09 Oberdorfer Fa F Beschichtetes, flexibles, undurchlaessiges pressband fuer den einsatz in breit-nip-pressen
EP1927695A4 (fr) * 2005-09-22 2008-10-08 Ichikawa Co Ltd Courroie pour presse à sabot
US20120276166A1 (en) * 2009-12-18 2012-11-01 Mitsubishi Tanabe Pharma Corporation Elution-stabilized preparation
US9572806B2 (en) * 2009-12-18 2017-02-21 Mitsubishi Tanabe Pharma Corporation Elution-stabilized preparation

Also Published As

Publication number Publication date
DE3473778D1 (en) 1988-10-06
ATE36877T1 (de) 1988-09-15
EP0185108B1 (fr) 1988-08-31

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