WO2009106225A1 - Cylindre - Google Patents

Cylindre Download PDF

Info

Publication number
WO2009106225A1
WO2009106225A1 PCT/EP2009/000898 EP2009000898W WO2009106225A1 WO 2009106225 A1 WO2009106225 A1 WO 2009106225A1 EP 2009000898 W EP2009000898 W EP 2009000898W WO 2009106225 A1 WO2009106225 A1 WO 2009106225A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibers
roller
resin
roll
peek
Prior art date
Application number
PCT/EP2009/000898
Other languages
German (de)
English (en)
Inventor
Carsten Sohl
Original Assignee
Schäfer Composites 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
Priority claimed from DE200810011498 external-priority patent/DE102008011498A1/de
Priority claimed from DE200810011496 external-priority patent/DE102008011496A1/de
Application filed by Schäfer Composites GmbH filed Critical Schäfer Composites GmbH
Publication of WO2009106225A1 publication Critical patent/WO2009106225A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0233—Soft rolls

Definitions

  • the invention relates to a roller, as it is used in particular in the Textilbe- handling, especially as a calender roll.
  • the roller has an outer covering with fibers embedded in an embedding material, for example in an adhesive or a resin.
  • Such a coating should be very smooth, so that, for example, thus treated paper is smooth, especially in the production of so-called coated papers.
  • the problem with such coverings with a fiber content is, especially with high-conductivity fibers such as aramid fibers or the like., That the pads or especially the embedding material wear out slowly or be removed. It may be that due to different material properties fibers as a piece or with a piece of their length, so to speak, are torn out of the coating as a whole, if they are partially or largely free. However, this causes, so to speak, a hole arises where previously the fiber was embedded in the embedding material, and thus the desired and required smooth surface of the covering is no longer guaranteed. The working quality of such a roll is then deteriorated.
  • the invention has for its object to provide an aforementioned roller, can be avoided with the problems of the prior art and in particular a better abrasion behavior of a covering can be achieved.
  • This object is achieved by a roller with the features of claim 1.
  • Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below.
  • the wording of the claims is incorporated herein by express reference.
  • the wording of priority applications DE 102008011496.0 and DE 102008011498.7 of February 25, 2008 of the same Applicant are incorporated by express reference into the content of the present description.
  • the fibers comprise a material of the following group: PEEK material, phenolic resin or PAI.
  • PEEK material is polyetheretherketone
  • PAI are polyamideimides.
  • all the fibers of the covering on such a material from this group or consist thereof particularly advantageous PEEK material.
  • at least a part of the fibers consists entirely of the material of this group, wherein in a particularly preferred embodiment of the invention, all the fibers of the coating consist entirely of such a material.
  • PEEK material is known in fiber form and is offered, among others, by the manufacturers Zyex or Swicofil.
  • the advantage of the invention is that fibers made of PEEK can have an E-modulus of about 4000 to 6000, which fits very well to the modulus of elasticity of the resin or epoxy resin as the embedding material.
  • the abrasion properties of fibers and resin are similar, so that the mentioned problem of tearing individual fibers or pieces of fiber is minimized, possibly even completely eliminated.
  • the PEEK fibers and the resin as embedding material of their properties, in particular in terms of Abriebeigenschaften or abrasion resistance, matched to each other or these are chosen as equal as possible.
  • the fibers may be planar resin, most preferably phenolic resin or PAI.
  • phenolic resin phenolic resin
  • kynol fibers as can be obtained, for example, via Kynol Europa GmbH.
  • the embedding material is a phenolic resin or even the same phenolic resin.
  • the potting material may be an epoxy resin.
  • the covering is indeed composed of different constituents. After curing, however, it consists, so to speak, of the same material and thus has continuous and identical properties. It has even been shown that at one Microsection through the covering the fibers hardly or not at all can be distinguished from the embedding material, so that they have dissolved in terms of the properties of the finished covering, so to speak in the embedding material or absorbed it.
  • the main advantage of the use of these fibers then lies in the supportive effect for a simpler production process of the covering or cover in order to avoid a complex casting of a covering of a single material.
  • fibers with a diameter of 1 .mu.m to 20 .mu.m are used. Their length can be less than a few cm in common ranges, for example, less than a few millimeters.
  • endless fibers can be used, which will be explained in more detail.
  • the fibers are mixed either the covering or the embedding material individually or loosely, so to speak as bulk material or without structure.
  • the embedding material can then be processed as a cast material.
  • the fibers can be processed as rovings or nonwoven fabric for the construction of the cover, for example, as multiple wound on the roll or a roll base fleece. It is soaked with embedding material.
  • the fibers are then advantageously quite short and arranged completely arbitrary, which is then referred to as wet nonwoven. With very long or almost infinitely long fibers so-called spun-laced non-woven can be produced. Here are the fibers, which can then be almost infinitely long, substantially in the longitudinal direction of the web.
  • a nonwoven can also form a kind of very loose felt, for example in the manner of stripes or mats. These are examples of so-called non-woven cover materials.
  • the volume fraction of fibers on the finished cover in particular of fibers entirely of PEEK material on the one hand or of embedding material on the other hand, can be from 3% by volume to 15% by volume.
  • it is 5 vol% to 10 vol%.
  • the volume fraction is rather lower with about 3% by volume.
  • the spun-laced nonwoven it is significantly higher, for example 11% by volume.
  • a mixture of different fibers may be provided, for example with the addition of the aforementioned aramid or carbon fibers to the PEEK fibers according to the invention.
  • the proportions may be about the same size, for example.
  • FIG. 1 shows a section through a roller according to the prior art with fibers in the covering
  • FIG. 2 shows the roller from FIG. 1 with parts of the fibers broken off from the covering
  • FIG. 3 shows a section through a roller according to the invention in FIG
  • FIG. 4 shows a section through a further roll according to the invention
  • FIG. 5 shows a further inventive roller with a coating of
  • Phenolic resin and phenolic resin fibers with the fibers wound up in an orderly manner.
  • a roller 11 according to the prior art is shown in section.
  • the roller 11 has an outer side or surface 12 of a covering 13.
  • the pad 13 consists of fibers 14 which are embedded in resin 15.
  • the fibers 14 are made of aramid or kevlar, for example.
  • the resin 15 is advantageously epoxy resin.
  • the illustration in Fig. 1 is of course only to be understood schematically, since usually the proportion of fibers 14 in the coating 13 is considerably higher, for example, with a share of 3Vol-% to 15Vol-%.
  • a roller 20 according to the invention is shown, and it also has a surface 21, which is formed by a coating 22.
  • the lining 22 contains the fibers 23 according to the invention made of PEEK material. These PEEK fibers 23 are embedded in resin 24, for example, epoxy resin similar to the prior art roller 11.
  • resin 24 for example, epoxy resin similar to the prior art roller 11.
  • a roller 111 is shown having a surface 112 with which the roller 111 can be pressed against another roller, such as a calender roller, to machine intermediate paper.
  • the roller 111 has a covering 113, which forms the surface 1 12.
  • the pad 113 is made of fibers 114 embedded in a resin 115.
  • the fibers 114 may also be made of PEEK material, similar to that shown in FIG. 2, or of phenolic resin or PAI.
  • the fibers 114 are embedded here substantially disorderly in the lining 113 or in the resin 115.
  • the felted fibers 114 may be wound onto a core, not shown, underlying the pad 113, along with the resin 215.
  • the density or volume fraction of the fibers 114 to the resin 115 may be even greater, in particular, the fibers may be much denser.
  • the advantageous aspect of the invention is to be illustrated that it is not just the same material in each case.
  • the fibers 114 in the covering 1 13 compared to the resin 115 can not be made, so to speak, since they both consist of the same material and therefore, of course, have the same properties.
  • FIG. 5 shows a further roller 211 according to the invention. It has a surface 212 which is formed by a coating 213.
  • the pad 213 contains, basically similar to FIG. 4, fibers 214 and resin 215.
  • the fibers 214 are applied in an ordered manner or aligned approximately in the circumferential direction of the roller 21 1.
  • they can be applied, for example, as a non-woven or as a rectified fiber composite.
  • the production processes of the roller 111 differ according to FIG. as the roller 311 of FIG. 5 is not. Both production methods can be as explained above, namely that on a not shown, under the respective pad 113 and 213 lying core, in particular of metal, the fibers 114 and 214 are wound and embedded in resin 115 and 215, respectively.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)

Abstract

La présente invention concerne un cylindre (20) qui est utilisé comme cylindre de calandre dans le traitement du papier. Le cylindre présente un revêtement extérieur (22) qui contient des fibres de polyétheréther-cétone (23) noyées dans de la résine (24), permettant d'améliorer ses caractéristiques de résistance à la rupture. Le module d'élasticité et le comportement à l'abrasion des fibres étant similaires à ceux de la résine (24), la surface (21) du revêtement (22) s'use de façon uniforme et présente une qualité élevée constante. En variante au polyétheréther-cétone, la matière utilisée pour les fibres peut être une résine phénolique ou du polyamide-imide.
PCT/EP2009/000898 2008-02-25 2009-02-10 Cylindre WO2009106225A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102008011496.0 2008-02-25
DE200810011498 DE102008011498A1 (de) 2008-02-25 2008-02-25 Walze
DE102008011498.7 2008-02-25
DE200810011496 DE102008011496A1 (de) 2008-02-25 2008-02-25 Walze

Publications (1)

Publication Number Publication Date
WO2009106225A1 true WO2009106225A1 (fr) 2009-09-03

Family

ID=40456834

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/000898 WO2009106225A1 (fr) 2008-02-25 2009-02-10 Cylindre

Country Status (1)

Country Link
WO (1) WO2009106225A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116892A2 (fr) * 2000-01-14 2001-07-18 Voith Paper Patent GmbH Rouleau élastique et procédé de fabrication d' un tel rouleau

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116892A2 (fr) * 2000-01-14 2001-07-18 Voith Paper Patent GmbH Rouleau élastique et procédé de fabrication d' un tel rouleau

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