EP1214469A1 - Paper machine cover - Google Patents
Paper machine coverInfo
- Publication number
- EP1214469A1 EP1214469A1 EP00960470A EP00960470A EP1214469A1 EP 1214469 A1 EP1214469 A1 EP 1214469A1 EP 00960470 A EP00960470 A EP 00960470A EP 00960470 A EP00960470 A EP 00960470A EP 1214469 A1 EP1214469 A1 EP 1214469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper web
- contact surface
- elements forming
- fabric
- covering
- 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
- 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
-
- 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
- Y10T428/23907—Pile or nap type surface or component
- Y10T428/23957—Particular shape or structure of pile
- Y10T428/23964—U-, V-, or W-shaped or continuous strand, filamentary material
-
- 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.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
-
- 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.]
- Y10T428/24777—Edge feature
-
- 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.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/2481—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including layer of mechanically interengaged strands, strand-portions or strand-like strips
-
- 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.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/2481—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including layer of mechanically interengaged strands, strand-portions or strand-like strips
- Y10T428/24818—Knitted, with particular or differential bond sites or intersections
Definitions
- Such paper machine clothing which rotates endlessly on rollers, is e.g. around dryer fabrics that are used to remove moisture from the paper web, in particular by supplying heat.
- Heat permeability, wear resistance, air permeability and air entrainment as well as surface structure are the essential characteristics of such dryer fabrics to achieve a perfect quality of the paper web to be dried.
- dryer fabrics which are flexible fabrics, as fabric, knitted fabric, spiral goods or articulated support segments - usually made as injection molded parts - run.
- the most common case is likely to be woven dryer fabrics, followed by those in the form of a spiral ware.
- the contact area is defined as the sum of the many individual areas of individual screen wires that come into contact with the paper web.
- the contact area could be significantly increased with the introduction of long floating screen constructions.
- round or rectangular wire cross sections were processed.
- a further significant increase in the contact area could be achieved by using so-called flat ribbons as longitudinal wires, i.e. in the direction of the machine direction.
- Flat ribbons are wires in which the ratio of the width to the thickness is substantially larger, for example 3: 1, than in the case of conventional flat wires.
- contact areas of almost 60% can be achieved.
- such screen constructions offer a contact area which is composed of fewer, but larger instead of more, but smaller, contact areas.
- a screen cleaning system is installed in the front areas of the dryer section in the machine running direction, which can have a continuous or periodic mode of operation.
- the paper web still has a relatively high moisture content and is therefore particularly sensitive to the entrainment of dirt particles that detach from the contact side of the dryer fabric.
- the invention has for its object to propose a clothing of a paper machine, in which the tendency to adhere dirt particles is reduced. Furthermore, the size from which agglomerated dirt particles loosen from the contact surface should be reduced.
- this object is achieved by a covering in which at least the surface of at least part of the elements forming the contact surface facing the paper web has at least partly an average roughness depth between 5 ⁇ m and 100 ⁇ m.
- the average roughness depth is determined in accordance with DIN EN ISO 4287. If compliance with the specifications regarding the length of the measuring section is not possible because, for example, a measurement transverse to the longitudinal direction of a narrow ribbon is necessary, a non-contacting one can alternatively be used Laser measurement can be used.
- the invention is based on the knowledge that a covering with a roughness depth of the contact areas in the aforementioned area does not have any coherent larger contact areas due to the limited flexibility of the paper web, which could serve as an adhesion area for dirt particles.
- growing agglomerations of dirt particles separate from the coverings according to the invention before they can reach a critical size which leads to quality problems for the paper web.
- the surface areas of the elements forming the contact surface facing the paper web for coverings according to the prior art usually have an average roughness depth in the range between approximately 1.5 and 3.0 ⁇ m.
- This roughness depth is thus substantially less than that proposed according to the invention and results in particular from the customary production processes for the elements forming the contact surface, namely extrusion in the case of wires or tapes or injection molding in the case of supporting segments which are to be connected to one another in an articulated manner.
- the elements were realized with the lowest possible roughness that was acceptable for economic reasons, in order to do justice to the common idea that the smallest possible tendency to contamination results from the smoothest possible surface.
- the fine structure results in a significantly improved possibility of detachment, in particular for dirt particles resulting from agglomeration, so that they detach at a much earlier point in time, ie with a significantly smaller size, and therefore do not lead to the known quality losses on the paper surface ,
- the covering is a woven fabric, at least some of its longitudinal threads having an average roughness between 5 ⁇ m and 100 ⁇ m, at least on the surface facing the paper web.
- Such an embodiment is to be preferred for production-technical reasons, since the fine structure of the covering can be realized while maintaining the usual weaving techniques and types of weave during the production of the longitudinal threads, for example by extrusion.
- transverse threads of the fabric have an average roughness depth of between 5 ⁇ m and 100 ⁇ m, at least on the surface facing the paper web.
- longitudinal and / or transverse threads of the fabric are profiled in cross section. This is particularly straightforward from a production point of view, particularly when the threads are produced by extrusion.
- threads are profiled in longitudinal section.
- the elements forming the contact surface to the paper web are spirally running threads, the surface of which faces the paper web has an average roughness depth between 5 ⁇ m and 100 ⁇ m.
- the elements forming the contact surface with the paper web are injection-molded segments, each of which is articulatedly connected to adjacent injection-molded segments at least in the longitudinal direction of the drying wire and whose surface facing the paper web is at least partially an average roughness depth between 5 ⁇ m and 100 ⁇ m.
- a particularly effective prevention of dirt particle accumulation and agglomeration occurs in the range of an average roughness depth between 10 ⁇ m and 80 ⁇ m.
- a roughness depth between 30 ⁇ m and 70 ⁇ m should preferably be achieved.
- a further development of the covering according to the invention is that the elements forming the contact surface consist of two different materials.
- a particularly advantageous way of achieving a multilayer element for forming the contact surface consists in that the surface of the elements forming the contact surface facing the paper web is produced by coating a base body.
- a finished covering for example also a fabric
- the coating of the individual elements, such as the threads or injection molding elements, from which the covering is composed is possible.
- the elements forming the contact surface are produced by means of a multi-component extrusion in order in this way to ensure an intimate bond between the different materials of the elements.
- Fig. 1 sections of particularly profiled in the longitudinal direction
- Fig. 9 ribbons or wires to form a dry fabric or a dry fabric in the form of spiraled goods.
- a section of a ribbon 1 shown in perspective in FIG. 1 has a ratio of width 2 to thickness 3 which is in the range of approximately 4: 1. While the surface of the ribbon 1, which is produced by extrusion, is smooth on one side (surface 4), the surface 5, which in sections forms the contact surface with the paper web when the ribbon 1 is processed into a woven dryer fabric, is irregularly structured. This structured surface 5 has an average roughness depth between 5 ⁇ m and 100 ⁇ m. Structuring of this type can be produced, for example, with the aid of embossing of the plastic material which has not yet fully cured.
- the ribbon 1 'shown in FIG. 2 differs from that shown in FIG. 1 by a regular structure of its surface 5', which has three parallel rows of cylindrical bumps 6 running in the longitudinal direction.
- the bumps 6 are arranged equidistantly from one another in each row and likewise form rows running in the transverse direction of the flat ribbon 1 '.
- the bumps 6 can also be conical or rounded knob-shaped.
- the surface 5 is provided with elevations 7 which run in the transverse direction of the flat ribbon 1" and which are triangular in cross section.
- the individual elevations 7 are - viewed in the longitudinal direction of the flat ribbon 1 "- always arranged at the same distance from each other.
- FIG. 4 shows a view of a section of a ribbon 8, which in cross section is composed of four individual wires which are approximately circular in cross section, the individual wires, however, being homogeneously connected to one another via sufficiently large connecting surfaces.
- the flat ribbon 8 according to FIG. 4 is produced by extrusion through a die of corresponding cross-section.
- the ratio of the width 9 to the thickness 10 of the ribbon 8 is approximately 4: 1.
- the constrictions in the area of the transition between two abutting round wires is approximately 20% of the thickness 10 from each side.
- the thickness 10 is 0.15 mm to 0.3 mm.
- the flat ribbon 8 ' is composed of two layers S' and S ", of which the upper layer S ', which is provided with a structured surface, faces the paper web in the dry sieve fabric and therefore forms the contact surface in sections.
- the lower layer S" is special with regard optimized for strength properties.
- FIG. 9 also shows a ribbon 8 ′ ′′, which is composed of four individual wires with a cross section in the form of squares standing on top.
- dryer fabrics are produced according to the invention, the tapes or wires being able to be used both in the threads running in the machine longitudinal direction and in the threads running transverse to the machine longitudinal direction. It is essential for the success of an early detachment of dirt particles that the profiled surface of the ribbon or wire forms the individual surfaces of the contact surface with the paper web. It is entirely possible, for example, to use ribbons which are not profiled or have a different profile for the longitudinal edges of the covering than the flat ribbons provided and described above for use in the middle part.
Landscapes
- Paper (AREA)
- Inorganic Insulating Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19945077 | 1999-09-21 | ||
DE19945077 | 1999-09-21 | ||
PCT/EP2000/008000 WO2001021884A1 (en) | 1999-09-21 | 2000-08-16 | Paper machine cover |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1214469A1 true EP1214469A1 (en) | 2002-06-19 |
EP1214469B1 EP1214469B1 (en) | 2004-01-02 |
Family
ID=7922681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00960470A Expired - Lifetime EP1214469B1 (en) | 1999-09-21 | 2000-08-16 | Paper machine cover |
Country Status (11)
Country | Link |
---|---|
US (1) | US6773786B1 (en) |
EP (1) | EP1214469B1 (en) |
CN (1) | CN1175141C (en) |
AT (1) | ATE257192T1 (en) |
AU (1) | AU774411B2 (en) |
CA (1) | CA2388568C (en) |
DE (1) | DE50004938D1 (en) |
ES (1) | ES2213602T3 (en) |
NO (1) | NO321802B1 (en) |
PT (1) | PT1214469E (en) |
WO (1) | WO2001021884A1 (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2451370C (en) | 2001-07-05 | 2007-09-25 | Astenjohnson, Inc. | Industrial fabric including yarn assemblies |
EP1333120B1 (en) * | 2002-02-01 | 2004-10-27 | Thomas Josef Heimbach GmbH & Co. | Papermaker's fabric, in particular press felt |
JP4390708B2 (en) * | 2002-11-27 | 2009-12-24 | 独立行政法人科学技術振興機構 | Fine protrusion structure and manufacturing method thereof |
US20040127127A1 (en) * | 2002-12-30 | 2004-07-01 | Dana Eagles | Bicomponent monofilament |
US20040127129A1 (en) | 2002-12-31 | 2004-07-01 | Shuiyuan Luo | Grooved-shape monofilaments and the fabrics made thereof |
ATE486995T1 (en) * | 2003-08-13 | 2010-11-15 | Heimbach Gmbh & Co | PAPER MACHINE CLOTHING |
DE102006003706A1 (en) * | 2006-01-26 | 2007-08-02 | Voith Patent Gmbh | conveyor belt |
DE102006004106A1 (en) | 2006-01-28 | 2007-08-02 | Voith Patent Gmbh | Machine for producing a fibrous web |
US8826560B2 (en) * | 2006-09-01 | 2014-09-09 | Kadant Inc. | Support apparatus for supporting a syphon |
CA2600307A1 (en) * | 2007-09-07 | 2009-03-07 | Ralph Roemer | Fabric for producing spunmelt or airlaid nonwovens including profiled yarns for soil release and contamination resistance |
CA2688470A1 (en) | 2009-12-11 | 2011-06-11 | Allan Manninen | Industrial fabric comprised of selectively slit and embossed film |
USD806146S1 (en) * | 2011-11-11 | 2017-12-26 | Schleuniger Holding Ag | Machine cover |
USD806766S1 (en) * | 2011-11-11 | 2018-01-02 | Schleuniger Holding Ag | Machine cover |
EP2978893B1 (en) * | 2013-03-26 | 2018-05-30 | AstenJohnson, Inc. | Mechanically interlocked nonwoven industrial fabric |
SE540714C2 (en) * | 2015-06-18 | 2018-10-16 | Stora Enso Oyj | Container with oleophilic pattern on a sealing surface |
EP3356597A4 (en) * | 2015-09-30 | 2019-03-13 | AstenJohnson, Inc. | High stability stacked warp dryer fabric |
CN109653020A (en) * | 2019-01-07 | 2019-04-19 | 江苏金呢工程织物股份有限公司 | A kind of novel antipollution flat filament dry net, paper forming layer warp and paper machine |
FI20215654A1 (en) | 2021-06-04 | 2022-12-05 | Valmet Technologies Inc | Monofilament yarn |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL274554A (en) * | ||||
DE718655C (en) | 1940-11-01 | 1942-03-19 | Antonius Kufferath | Screen mesh |
US3354022A (en) * | 1964-03-31 | 1967-11-21 | Du Pont | Water-repellant surface |
US4395308A (en) * | 1981-06-12 | 1983-07-26 | Scapa Dyers Inc. | Spiral fabric papermakers felt and method of making |
DE3638036A1 (en) * | 1986-11-07 | 1988-05-11 | Siteg Siebtech Gmbh | SPIRAL LINK BAND WITH DIVIDED SPIRALS |
DE3735709C2 (en) * | 1987-10-22 | 1995-08-10 | Heimbach Gmbh Thomas Josef | Paper machine belt |
US4943476A (en) * | 1988-10-27 | 1990-07-24 | Albany International Corp. | Water removal on papermachine through riblet effect |
US5324392A (en) * | 1989-04-18 | 1994-06-28 | Nippon Filcon Co., Ltd. | Extendable and heat shrinkable polyamide mono-filament for endless fabric and endless fabric |
DE4137984C1 (en) * | 1991-11-19 | 1992-12-17 | Thomas Josef Heimbach Gmbh & Co, 5160 Dueren, De | |
US5207873A (en) * | 1992-04-17 | 1993-05-04 | Huyck Corporation | Anti-contaminant treatment for papermaking fabrics |
US5298124A (en) * | 1992-06-11 | 1994-03-29 | Albany International Corp. | Transfer belt in a press nip closed draw transfer |
US5534333A (en) * | 1995-04-07 | 1996-07-09 | Shakespeare | Spiral fabric |
SE504975C2 (en) * | 1995-09-08 | 1997-06-02 | Albany Int Corp | dryer screen |
PT786550E (en) | 1996-01-25 | 2000-05-31 | Munzinger Conrad & Cie Ag | BAND OF MATERIAL AS WELL AS ITS PREPARATION |
US5837102A (en) * | 1997-04-24 | 1998-11-17 | Voith Sulzer Paper Technology North America, Inc. | Perforated and embossed sheet forming fabric |
FI103681B (en) * | 1998-06-05 | 1999-08-13 | Tamfelt Oyj Abp | Arrangement for drying section of paper machine |
-
2000
- 2000-08-16 CN CNB00813149XA patent/CN1175141C/en not_active Expired - Lifetime
- 2000-08-16 ES ES00960470T patent/ES2213602T3/en not_active Expired - Lifetime
- 2000-08-16 DE DE50004938T patent/DE50004938D1/en not_active Expired - Lifetime
- 2000-08-16 AT AT00960470T patent/ATE257192T1/en active
- 2000-08-16 US US10/088,822 patent/US6773786B1/en not_active Expired - Lifetime
- 2000-08-16 PT PT00960470T patent/PT1214469E/en unknown
- 2000-08-16 WO PCT/EP2000/008000 patent/WO2001021884A1/en active IP Right Grant
- 2000-08-16 AU AU72768/00A patent/AU774411B2/en not_active Expired
- 2000-08-16 EP EP00960470A patent/EP1214469B1/en not_active Expired - Lifetime
- 2000-08-16 CA CA 2388568 patent/CA2388568C/en not_active Expired - Lifetime
-
2002
- 2002-03-21 NO NO20021417A patent/NO321802B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0121884A1 * |
Also Published As
Publication number | Publication date |
---|---|
PT1214469E (en) | 2004-05-31 |
NO20021417L (en) | 2002-03-21 |
CN1375026A (en) | 2002-10-16 |
CN1175141C (en) | 2004-11-10 |
NO20021417D0 (en) | 2002-03-21 |
NO321802B1 (en) | 2006-07-03 |
AU7276800A (en) | 2001-04-24 |
AU774411B2 (en) | 2004-06-24 |
ES2213602T3 (en) | 2004-09-01 |
CA2388568C (en) | 2007-01-30 |
WO2001021884A1 (en) | 2001-03-29 |
CA2388568A1 (en) | 2001-03-29 |
ATE257192T1 (en) | 2004-01-15 |
EP1214469B1 (en) | 2004-01-02 |
DE50004938D1 (en) | 2004-02-05 |
US6773786B1 (en) | 2004-08-10 |
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