EP2155956A1 - Paper machine covering - Google Patents
Paper machine coveringInfo
- Publication number
- EP2155956A1 EP2155956A1 EP08717359A EP08717359A EP2155956A1 EP 2155956 A1 EP2155956 A1 EP 2155956A1 EP 08717359 A EP08717359 A EP 08717359A EP 08717359 A EP08717359 A EP 08717359A EP 2155956 A1 EP2155956 A1 EP 2155956A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- perforations
- filler
- films
- film
- polymer material
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- D21F1/0063—Perforated sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/04—Punching, slitting or perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/04—Punching, slitting or perforating
- B32B2038/047—Perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
- B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
- B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
- B32B2310/0843—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using laser
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24322—Composite web or sheet
Definitions
- the invention relates to a covering for a paper, board or tissue machine according to the preamble of patent claim 1.
- repetition patterns in the drainage channels of a paper machine tension have the disadvantage that they leave a strong mark on the paper that was produced with such a covering.
- the object is achieved by a covering for a paper, cardboard or tissue machine with a plurality of films of polymer material laminated on one another.
- Each of the laminated films has a plurality of perforations, each extending over the thickness of the respective film.
- the perforations of the various films are further arranged to each other such that they form drainage channels in the fabric, whereby which can flow a fluid through the fabric.
- the fabric of the present invention is characterized in that at least one of the perforated films is formed by first forming an imperforate film with the polymer material and a filler added to the polymer material and forming the perforations in the film by subsequently removing the filler from the polymer material ,
- an unperforated film is first formed from a blend of materials containing the polymeric material and the filler partially embedded in the polymeric material.
- the perforated film is then formed by removing the filler from the polymer material in the unperforated film.
- perforations in the film are thus created by filling a part of the film layer with a filler during its production and later removing the filler from the film layer in order to release a cavity forming the perforation.
- a filler is added to the polymer material forming the film, which is subsequently removed again from the solidified polymer material of the film, depending on the nature and distribution of the added filler there are virtually unlimited possibilities in the art simple and flexible design of perforations in the film in terms of their number, size, distribution and shape.
- the invention provides a particularly inexpensive and flexible fabric to be produced.
- the filler can be removed from the film by means of evaporation, removal, such as, for example, washing out or melting out.
- the filler of the at least one film is formed by filler particles.
- the filler may contain filler particles of various matehals.
- the filler may contain filler particles of various sizes and shapes.
- a possible embodiment of the invention provides that the filler is removed from the polymer material by means of electromagnetic radiation, in particular by means of laser light.
- the filler has a greater energy absorption than the polymer material, so that when irradiating the film, the incident energy is absorbed to a greater extent by the filler and not by the polymer material and causes the filler, for example, evaporated or melts and a perforation is produced in the film.
- Another embodiment provides, for example, for the filler to be able to be dissolved out of the polymer material forming the film on exposure to a solvent, for example.
- consideration is given to NaCl as filler, which can be easily dissolved out of the film by water, as a result of which the perforations are produced.
- the individual filler particles embedded in the polymer material each extend at least over the thickness of the film. This assumes that the filler particle is as long in at least one direction as the film is thick. If the maximum dimension of the filler particle is equal to or greater than the film thickness in one direction and less than the film thickness, it must be aligned along its maximum dimension along the thickness of the film. Alternatively, the filler particles may be sized relative to the thickness of the film so that they always extend across the thickness of the film regardless of their orientation.
- a perforation is produced by removing a plurality of agglomerate-forming filler particles.
- the respective agglomerate of filler particles extends over the entire thickness of the film.
- the filler particles may also have an elongated shape, spherical or cylindrical. Furthermore, it is also conceivable that the filler particles are arbitrarily shaped.
- the shape of the perforations and thus the shape of the drainage channels can be influenced both by the shape of the filler particles and by the orientation of the filler particles.
- the orientation of the filler particles plays a role in the formation of the shape of a perforation, particularly in the case of a non-point-symmetrical particle shape, such as an elongated particle shape.
- a particularly preferred development of the invention provides that a plurality, in particular all, of the perforated films are formed by first producing a non-perforated film with the polymer material and a filler added to the polymer material and the perforations in the film by subsequent removal of the filler are formed from the polymer material.
- the filler comprises differently sized filler particles for providing perforations of different sizes.
- the fabric according to the invention can comprise a plurality of films whose perforations are formed by removing filler previously embedded in the polymer material.
- the perforations of the different films have different sizes.
- a preferred embodiment of the invention therefore provides that in at least two of the films, the perforations are formed by removing filler and the size of the perforations in one of the two films is different from the size of the perforations in the other of the two films. This is achieved, for example, by making the size of the filler particles in one of the films different from the size of the filler particles in another of the films in the production of the films.
- Typical sizes for the filler particles are in the range of 20 ⁇ m to 400 ⁇ m.
- the dewatering structure of the fabric of the present invention can be further influenced by forming the perforations in at least two of the films by removing filler, and the number of perforations in one of the two films is different from the number of perforations in the other of the two films.
- This result is achieved, for example, by using the proportion of filler material in the production of the films. particle in one of the foils is different from the proportion of filler particles in another of the foils.
- the dewatering structure of the fabric may be affected by at least two of the films forming the perforations by removing filler and the shape of the perforations in one of the two films being different from the shape of the perforations in the other of the two films.
- This result is achieved, for example, by making the shape of the filler particles in one of the films different from the shape of the filler particles in another of the films in the production of the films.
- a further advantageous embodiment of the invention provides that in at least one of the foils the filler comprises filler particles of different materials. It is also conceivable that filler particles in one of the foils are of a different material than filler particles in another of the foils.
- a concrete embodiment of the invention provides a covering in which the uppermost, i. those with the paper web, and the lowest, i. the with the machine in
- Contactable film has perforations each formed by removing filler and the diameter of the perforations in the uppermost film is smaller than the diameter of the perforations in the lowermost film and / or the
- Number of perforations in the topmost foil is greater than the number of perforations in the bottommost foil.
- particle sizes in the range from 30 ⁇ m to 400 ⁇ m and on the machine side particle sizes in the range from 40 ⁇ m to 400 ⁇ m are examples in this connection on the paper side.
- the fabric according to the invention comprises a textile surface structure and / or a yarn sheet.
- textile surface structures are in this context, for example, tissue, Knitted fabrics or nonwovens conceivable, but this list is not exhaustive.
- the textile surface structure and / or yarn sheet assumes the function of reinforcing the fabric according to the invention.
- FIG. 1 shows a process for the production of a novel composition
- Figure 2 shows a fabric according to the invention.
- FIG. 1 a shows a method for producing a paper machine clothing.
- a polymer material 3 is added to an extrusion device 1 for producing an extrusion compound from a first metering device 2 and a particulate filler 5 is added from a second metering device 4.
- the extrusion compound 6, which comprises the polymer material 3 and the filler 5, is placed in a direction of the arrow moving conveyor belt 7 to produce a non-perforated film 8.
- perforations 9 are produced in the film 8, which in each case extend over the entire film thickness.
- the filler 5 is removed from the film 8, whereby a perforated film 10 is formed.
- the filler 5 has a greater absorption of laser light (for example. In the range 10 microns or 250-200nm) than the polymer material 3, so that it is possible, the filler 5 by treatment with a laser light source 11 from the imperforate film 8 bspw. to remove by evaporation.
- FIG. 2 shows a papermachine fabric 12 formed as a forming fabric, which is formed from three perforated films 10a, 10b and 10c, which were all produced by the process described in FIG.
- the film 10a has a thickness of 0.08 mm and has a plurality of perforations 9a each extending across the thickness of the film layer 10a.
- the film 10b has a thickness of 0.18 mm and has a plurality of
- the film 10c has a thickness of 0.2 mm and has a plurality of
- Perforations 9c each extending over the thickness of the film layer 10a.
- the film 10a represents the uppermost film of the fabric 12 and provides the paper web 14 which can be brought into contact with the paper web. Further, the film 10c represents the lowermost film of the fabric 12 and provides the machine-engageable machine side 15.
- the foils 10a to 10c are laminated on top of one another, the perforations 9a to 9c of the different foils 10a to 10c being arranged relative to one another such that they form drainage channels 13 which extend from the paper side to the machine side 14, 15 of the fabric 12, respectively.
- the sizes of the respective perforations 9a to 9c differ from film to film, the perforations 9a in the uppermost film 10a being the smallest and the perforations 9c in the lowermost film 10c being the largest in the clothing 12 are.
- perforations 9a are formed by removing spherical filler particles, whereas the perforations 9b and 9c are formed by the removal of irregular filler particles.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007024847A DE102007024847A1 (en) | 2007-05-29 | 2007-05-29 | Paper machine clothing |
PCT/EP2008/052596 WO2008145420A1 (en) | 2007-05-29 | 2008-03-04 | Paper machine covering |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2155956A1 true EP2155956A1 (en) | 2010-02-24 |
Family
ID=39471850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08717359A Withdrawn EP2155956A1 (en) | 2007-05-29 | 2008-03-04 | Paper machine covering |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100136286A1 (en) |
EP (1) | EP2155956A1 (en) |
JP (1) | JP2010528198A (en) |
CN (1) | CN101778973A (en) |
CA (1) | CA2689605A1 (en) |
DE (1) | DE102007024847A1 (en) |
WO (1) | WO2008145420A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101655745B1 (en) * | 2009-01-28 | 2016-09-08 | 알바니 인터내셔널 코포레이션 | Industrial fabric for production of nonwovens, and method of making thereof |
CN103210142A (en) * | 2010-10-27 | 2013-07-17 | 沃依特专利有限责任公司 | Stretched endless fabric |
BR112017006124B1 (en) | 2014-09-25 | 2022-02-08 | Albany International Corp | PERMEABLE BELTS FOR CREPING OR STRUCTURING A WEFT IN A FABRIC PRODUCTION PROCESS |
ES2961677T3 (en) | 2014-09-25 | 2024-03-13 | Albany Int Corp | Multilayer tape for creping and structuring in a quilted paper manufacturing process |
US11098450B2 (en) | 2017-10-27 | 2021-08-24 | Albany International Corp. | Methods for making improved cellulosic products using novel press felts and products made therefrom |
EP3597821B1 (en) * | 2018-07-17 | 2024-01-03 | Voith Patent GmbH | Coupling for a machine for producing a sheet of fibrous material |
EP3839135B1 (en) * | 2019-12-19 | 2022-07-27 | Voith Patent GmbH | Paper machine clothing and method of producing the same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4541895A (en) * | 1982-10-29 | 1985-09-17 | Scapa Inc. | Papermakers fabric of nonwoven layers in a laminated construction |
US6188043B1 (en) * | 1998-11-24 | 2001-02-13 | Cryovac, Inc. | Method for making permeable film |
DE102004006103A1 (en) * | 2004-02-06 | 2005-10-20 | Voith Fabrics Patent Gmbh | Modular paper machine clothing |
-
2007
- 2007-05-29 DE DE102007024847A patent/DE102007024847A1/en not_active Withdrawn
-
2008
- 2008-03-04 EP EP08717359A patent/EP2155956A1/en not_active Withdrawn
- 2008-03-04 WO PCT/EP2008/052596 patent/WO2008145420A1/en active Application Filing
- 2008-03-04 CN CN200880101086.XA patent/CN101778973A/en active Pending
- 2008-03-04 CA CA002689605A patent/CA2689605A1/en not_active Abandoned
- 2008-03-04 JP JP2010509758A patent/JP2010528198A/en active Pending
-
2009
- 2009-11-25 US US12/626,071 patent/US20100136286A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2008145420A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2689605A1 (en) | 2008-12-04 |
US20100136286A1 (en) | 2010-06-03 |
WO2008145420A1 (en) | 2008-12-04 |
JP2010528198A (en) | 2010-08-19 |
CN101778973A (en) | 2010-07-14 |
DE102007024847A1 (en) | 2008-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20091229 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: STRAUB, MICHAEL Inventor name: SCHMITT, MATTHIAS Inventor name: HOEHSL, MATTHIAS Inventor name: HACK-UEBERALL, PETRA Inventor name: BEZ, FRANK |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20110203 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20110615 |