EP0111765A2 - Abrasive product with an extensible and flexible backing, method for its manufacture and its use - Google Patents

Abrasive product with an extensible and flexible backing, method for its manufacture and its use Download PDF

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Publication number
EP0111765A2
EP0111765A2 EP83111552A EP83111552A EP0111765A2 EP 0111765 A2 EP0111765 A2 EP 0111765A2 EP 83111552 A EP83111552 A EP 83111552A EP 83111552 A EP83111552 A EP 83111552A EP 0111765 A2 EP0111765 A2 EP 0111765A2
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EP
European Patent Office
Prior art keywords
abrasive
intermediate layer
base
grinding
elastic
Prior art date
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Granted
Application number
EP83111552A
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German (de)
French (fr)
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EP0111765B1 (en
EP0111765A3 (en
Inventor
Lotte Herrmann
Jakob Ackermann
Armin Steiner
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.)
Sia Abrasives Industries AG
Original Assignee
Sia Schweizer Schmirgel und Schleif Industrie AG
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Application filed by Sia Schweizer Schmirgel und Schleif Industrie AG filed Critical Sia Schweizer Schmirgel und Schleif Industrie AG
Priority to AT83111552T priority Critical patent/ATE47069T1/en
Publication of EP0111765A2 publication Critical patent/EP0111765A2/en
Publication of EP0111765A3 publication Critical patent/EP0111765A3/en
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Publication of EP0111765B1 publication Critical patent/EP0111765B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/02—Backings, e.g. foils, webs, mesh fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/001—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as supporting member

Definitions

  • the invention relates to an abrasive on a stretchable and flexible base, method for producing and using the same.
  • endless abrasive belts are often used, which have to be guided over a sliding contact roller, a drive roller, possibly a deflection roller and over a tension roller, etc.
  • the sanding belt adapts to the contours of the workpiece to be machined, it is pressed from the back against the workpiece to be sanded using a fixed profiled sanding block or sanding block.
  • Another possibility is to grind the workpiece with the sliding contact roller, the latter also being provided with the counter profile of the workpiece to be machined.
  • a device for grinding in particular for surface grinding of the surface of wooden parts is called, which consists in that an abrasive body is used which consists of an elastic material and which is at least partially surrounded by an endless grinding belt, that is elastic.
  • the connection area of the ends of the grinding belt is preferably elastic.
  • European patent application EP 0 052 866 A3 describes an abrasive belt for profile grinding, which consists of an expandable fabric base coated with abrasive grain, the warp threads of which run at an acute angle of 20-60 ° to the direction of belt travel and which have low-elongation longitudinal zones.
  • the aforementioned prior art also deals with the aforementioned patent application.
  • the object of the invention is to provide abrasives on a flexible and stretchable base, which allow this to adapt well to the workpiece during grinding and in particular during profile grinding.
  • the abrasive according to the invention should be able to be used in particular for the production of profiled grinding shoes, profiled grinding blocks and profiled grinding contact rollers or grinding wheels.
  • the previously known flexible abrasives on a base have a certain degree of extensibility. However, this extensibility is generally not sufficient to meet the requirements that are placed on an abrasive for profile grinding, for example. Even abrasives on a fabric backing, in which the extensibility was increased in accordance with EP 0.052 866 A3, were still unsatisfactory for difficult profiles. When using an elastic abrasive, breaking out of the abrasive grain is very problematic as soon as it is stretched or stretched to a certain degree, a degree of stretching that is often required by profile grinding.
  • an abrasive on a flexible base conforms, for example, to a profiled sanding shoe, a profiled sanding block, a profiled sanding roller or
  • it must be able to adjust the grinding contact roller, it must have an extensibility that is adapted to the specified profile shape, ie the abrasive on the base must be able to be stretched at elevated locations or at locations of elevated radii with a comparatively low tensile force and without breaking out of abrasive grain.
  • a stretch of 40% or more of the original length of the flat abrasive on the backing corresponds to a typical requirement. We refer to drawing 2, which will be described in more detail later.
  • a flexible and stretchable abrasive on a backing which, after stretching, no longer shows any destruction of the coating and no breaking out of the abrasive grain, has surprisingly been found by firstly producing the abrasive on a stretchable, textile backing, secondly with an elastic intermediate layer is provided, which lies between the textile base and the usual base binders to which the abrasive grain and cover binders are applied.
  • Such an abrasive is illustrated schematically in drawing 1, 1 representing the abrasive grain, 2 the cover binder, 3 the base binder, 4 the elastic intermediate layer and 5 the flexible and stretchable textile base.
  • the elastic intermediate layer mentioned consists, for example, of polyurethanes, polyacrylates, rubber latex and / or butadiene-containing polymers, such as, for example, acrylonitrile-butadiene-styrene or butadiene-styrene polymers (cf. Butadiene-Poly merisate im Kunststoffofflexikon, 7th edition, aa0, pages 99 and 100).
  • these polymers can be modified by adding hardeners or crosslinking agents or hardenable or crosslinkable resins, such as phenol, melamine, resorcinol or urea formaldehyde resins, in order to obtain the necessary elasticity and adhesion properties over a wide temperature range.
  • the elastic intermediate layer can also contain inorganic and / or organic fillers.
  • the intermediate layer according to the invention has a more or less pronounced elasticity (in the sense of the description in the plastic lexicon 7th edition by K. Stockhert, Carl Hanser Verlag 1981, page 151) or a relatively low modulus of elasticity (according to DIN 53 475 ) and at the same time must ensure good adhesion to the textile base on the one hand and the basic binder on the other.
  • the modulus of elasticity of the intermediate layer according to the invention measured on a test specimen according to DIN 53 457 should be at most 300 N / mm2, but preferably at most 50 N / mm2.
  • the intermediate layer according to the invention can be applied to the textile base by conventional methods, for example as a solution in an organic solvent, as an aqueous dispersion or as a melt, and then dried and, if appropriate, chemically crosslinked. It is also possible to apply the corresponding monomeric or prepolymeric substances to the base and then to carry out the polymerization and, if appropriate, the crosslinking, for example by means of electron beams.
  • the thickness or amount per unit area of the intermediate layer is not critical, but depends to a certain extent on the desired degree of stretching and the type of textile base, i.e. the depth of penetration into it. In general, the desired results are obtained with amounts (dry) between 40 and 120 g / m 2.
  • E rfindungsgemäss is a longitudinal and / or transverse direction preferably stretchable fabric having, for example, fibers of cellulose, cellulose acetate, polyamide, polyester, polyurethane and / or rubber polymers in the form of, for example, wovens, knits, nonwoven, scrims, or blended fabrics or knitted fabrics as backing used, which is optionally, for example, antistatic or equipped with adhesives. It is also possible to use a stretchable, non-textile fabric 1, such as an elastic film material. Sol 'che documents have been found to be less suitable.
  • the textile underlay on which the elastic intermediate layer is applied on one or both sides can contain larger or smaller proportions of elastomers, elastane fibers, elasto fibers, elastody fibers or threads (compare Kunststoff-lexikon, 7th edition, loc. Cit., Pages 150-153 ).
  • Highly elastic fibers which are extremely highly deformable and which have an elongation at break of more than 200%, usually 500-800%, can also be found in the textile underlay, which according to the invention is provided with an intermediate layer, before basic binder, abrasive grain and cover binder are applied , use.
  • weft and / or warp threads or yarns of high elasticity or stretch can be used in the textile fabric used as a base for the abrasive in the form of a woven fabric, knitted fabric, fleece, etc.
  • weft and / or warp threads or yarns of high elasticity or stretch can be used in the textile fabric used as a base for the abrasive in the form of a woven fabric, knitted fabric, fleece, etc.
  • Weft or warp threads or high elasticity yarns can be obtained by known methods, for example by spinning a "core" of elastomeric fibers with cotton fibers or by using textured or crimped threads or yarns.
  • the stretchable textile fabric used, to which an elastic intermediate layer is applied according to the invention can be made stretchable in all directions or only in one direction. It is preferably designed such that, in particular an extensibility is achieved transversely to the machine or longitudinal direction (in the case of a fabric this generally corresponds to the weft direction).
  • the abrasive according to the invention on a base has an extensibility in the longitudinal and / or transverse direction of at least 10% with a tensile load of 100 N / 5 cm, but preferably one of at least 25% with the same tensile load.
  • the extensibility can also be shown using the attached so-called force / strain diagram.
  • the diagram of drawing 3 shows the expansion or stretching of the abrasive as a function of the tensile load.
  • the tensile load is plotted in N / 5cm strip width and on the other the elongation in% of the original length.
  • Four tensile load / strain lines or curves are shown in the diagram, namely curves A, B, C and D.
  • Curves A and B serve as a comparison and correspond to typical values of a conventional coated abrasive.
  • Curve A corresponds to the machine or longitudinal direction
  • curve B to the transverse or weft direction of a typical conventional flexible abrasive on a cloth base (with the brand name "SIATUR JJ" from SIA).
  • Lines C and D correspond to the abrasive according to the invention, which are boundary lines.
  • the curves of the abrasive according to the invention should lie in the field on the left (double hatched side) of the boundary line C or preferably in the field on the left (hatched side) of the boundary line D.
  • the breaking load is not visible in the diagram.
  • the usual resin types such as, for example, phenol-formaldehyde, urea-formaldehyde or melamine-formaldehyde resins are used as base and cover binders. Phenol-formaldehyde resins are preferably used.
  • the usual abrasive grains in the usual grain size are used according to the invention, for example corundum, zirconium corundum, spinel corundum, silicon carbide, diamond, ruby, flint, emery.
  • the abrasive according to the invention is particularly suitable for profile grinding or for the production of profile grinding devices such as profile sanding shoes, profile sanding blocks or profile sanding contact rollers or rollers.
  • profile grinding devices mentioned can be produced economically using the abrasive according to the invention.
  • the high degree of elasticity enables it to be adapted to difficult profiles, eliminating the previous elaborate methods such as cutting open, making compression grooves, the use of segments with elastic connecting strips and much more.
  • Drawing 2 for example shows a cross section of a P produced from the inventive flexible and resilient abrasive rofilschleifternwalze. 8 shows the actual profile body which is coated with the abrasive 6 according to the invention.
  • the profile contact roller is applied to the receptacle and drive device 9 and fixed by means of part 10 and screw 11.
  • the production of the Profilkoni contact roller body 6 + 8 can be done in various ways.
  • the profile body 8 can either be made separately, for example from wood or plastic according to known methods, and then the abrasive 6 can be applied, for example by gluing, or the abrasive body 8 can be used with the 5 mounted abrasives 6 can be produced simultaneously from rigid polyurethane foam, for example by the injection molding process.
  • the dispersion was carried out with a doctor blade in an amount of 120 g / m 2 (wet) and then connected Send dried in a flat dryer at 120 ° C for 2 minutes.
  • This polyamide fleece with the elastic intermediate layer has now been used as a base for a flexible abrasive.
  • aqueous phenol-formaldehyde resol which had been filled with 20% limestone powder, was used as the basic binder for the abrasive grain; the solids content was 62%.
  • the phenolic resin was applied in a roll application process to the coated side of the polyamide fleece in an amount of 70 g / m 2.
  • 165 g / m2 of a commercially available aluminum oxide abrasive grain (grain no. P 120) was sprinkled into this coating.
  • the spreading process was carried out using the electrostatic spreading method that is common in the abrasives industry today.
  • the sprinkled fleece was then hung in a garland shape and the basic binder was dried and cured at 80 ° C. for 15 minutes, at 95 ° C.
  • the cover binder was applied in an amount of 260 g / m 2 using a soft rubber roller. This consisted of the same phenol-formaldehyde resole as the basic binder, but the filler content was 50%. Like the basic binder, the cover binder was dried and hardened in a hanging dryer. The hardened abrasive was flexed, ie the hard phenolic resin grit was broken into small segments. The tests on the finished abrasive showed that the high elongation values measured on the fleece are still present in the abrasive. For example, the elongation in the transverse direction was 40% with a tensile load of 100 N / 5cm.
  • the adhesion of the abrasive coating is very good and corresponds to a conventional abrasive with little stretch.
  • the abrasive could be glued true to the contour on a profile sanding block, whereby this was stretched up to 40% in individual zones.
  • a 150 g / m2 weft-elastic fabric was used as the base. It is a cotton fabric in plain weave, the weft threads of which are spun from a Lycra Fa ser- "soul" were made with cotton. The ratio of cotton to lycra was 90:10.
  • This fabric was coated with a doctor blade with 120 g / m2 of a 50% dispersion of thermally crosslinkable copolymers based on acrylic acid ester. The coating was dried in a flat dryer at 130 ° C. for 2 minutes.
  • the structure of the abrasive coating was the same as in Example 1, but a size P 80 abrasive grain was used.
  • a fabric with a highly elastic textured polyester filament weft and cotton warp in twill weave with a basis weight of 200 g / m2 was coated with a polyacrylic ester dispersion.
  • the 40% dispersion was dried with a doctor blade in amounts of 80 g / m 2 (wet) and both times at 120 ° C. for 2 minutes.
  • the structure of the abrasive coating was the same as in Example 1.
  • the extensibility in the transverse direction of the finished abrasive 5 hardly changed compared to the raw fabric.
  • the elongation at 80 N / 5 cm weft direction was 24% and the grain adhesion was perfect.

Abstract

A coated abrasive material comprising a textile backing-in the form of fabric, webbing, fleece and/or laminated material, base binder, abrasive particles and optionally size coat which is characterized in that the textile backing is extensible and that on the particle side an elastic intermediate layer is applied which lies between the textile backing and the usual base binder. This intermediate layer may contain caoutchouc latex and/or polyurethane and/or polymers, which contain butadiene and/or acrylic acid ester. The flexible and extensible coated abrasive may be used for profile grinding, sanding or polishing.

Description

Die Erfindung betrifft ein Schleifmittel auf dehnbarer und flexibler Unterlage, Verfahren zur Herstellung und Verwendung desselben.The invention relates to an abrasive on a stretchable and flexible base, method for producing and using the same.

Beim Schleifen von Profilen wird vielfach mit endlosen Schleifbändern gearbeitet, die über eine Schleifkontaktrolle, eine Antriebsrolle, gegebenenfalls eine Umlenkrolle und über eine Spannrolle usw. geführt werden müssen.When sanding profiles, endless abrasive belts are often used, which have to be guided over a sliding contact roller, a drive roller, possibly a deflection roller and over a tension roller, etc.

Damit sich das Schleifband den Konturen des zu bearbeitenden Werkstückes anpasst, wird dieses von der Rückseite her mit einem feststehenden profilierten Schleifschuh oder Schleifklotz gegen das zu schleifende Werkstück gepresst. Eine weitere MögE lichkeit besteht darin, das Werkstück-mit der Schleifkontaktrolle zu schleifen, wobei letztere ebenfalls mit dem Gegenprofil des zu bearbeitenden Werkstückes versehen wird.To ensure that the sanding belt adapts to the contours of the workpiece to be machined, it is pressed from the back against the workpiece to be sanded using a fixed profiled sanding block or sanding block. Another possibility is to grind the workpiece with the sliding contact roller, the latter also being provided with the counter profile of the workpiece to be machined.

Andere Vorrichtungen zum Schleifen von Profilen mit Schleifmitteln auf Unterlage bestehen aus profilierten Schleifklötzen, Schleifschuhen, Schleifkontaktwalzen oder Schleifrädern, welche mit einem Schleifmittel auf flexibler Unterlage, beispielsweise mittels Aufkleben oder Aufschweissen, überzogen werden. Um ein Anpassen des Schleifmittels an das Profil zu gewährleisten, mussten bisher meist aufwendige Methoden, wie beispielsweise das Einschneiden und/oder das Anbringen von Stauchrillen, angewendet werden. In jedem Falle besteht die Forderung, dass sich das flexible Schleifmittel konturengetreu dem gegebenen Profil anpasst.Other devices for grinding profiles with abrasives on a support consist of profiled grinding blocks, grinding shoes, grinding contact rollers or grinding wheels, which are coated with an abrasive on a flexible support, for example by means of gluing or welding. In order to ensure that the abrasive is adapted to the profile, it has hitherto usually been necessary to use elaborate methods, such as cutting and / or making compression grooves. In any case, there is a requirement that the flexible abrasive conforms to the given profile.

In der DE-OS 30 36 991 wird eine Vorrichtung zum Schleifen, insbesondere zum Flachschleifen der Oberfläche von Holzteilen genannt, die darin besteht, dass ein Schleifkörper verwendet wird, der aus einem elastischen Werkstoff besteht und der mindestens teilweise von einem endlosen Schleifband umgeben ist, das elastisch ist. Vorzugsweise ist dabei der Verbindungsbereich der Enden des Schleifbandes elastisch ausgebildet.In DE-OS 30 36 991 a device for grinding, in particular for surface grinding of the surface of wooden parts is called, which consists in that an abrasive body is used which consists of an elastic material and which is at least partially surrounded by an endless grinding belt, that is elastic. The connection area of the ends of the grinding belt is preferably elastic.

In der europäischen Patentanmeldung EP 0 052 866 A3 wird ein Schleifband für den Profilschliff beschrieben, das aus einer mit Schleifkorn beschichteten dehnbaren Gewebeunterlage besteht, deren Kettfäden zu der Bandlaufrichtung in einem spitzen Winkel von 20-60° verlaufen und das dehnungsarme Längszonen aufweist. In der genannten Patentanmeldung ist auch der vorangehende Stand der Technik abgehandelt.European patent application EP 0 052 866 A3 describes an abrasive belt for profile grinding, which consists of an expandable fabric base coated with abrasive grain, the warp threads of which run at an acute angle of 20-60 ° to the direction of belt travel and which have low-elongation longitudinal zones. The aforementioned prior art also deals with the aforementioned patent application.

Aufgabe der Erfindung ist es, Schleifmittel auf flexibler und dehnbarer Unterlage zu schaffen, die es gestatten, dass sich dieses beim Schleifen und insbesondere beim Profilschleifen dem Werkstück gut anpasst. Das erfindungsgemässe Schleifmittel soll sich insbesondere zur Herstellung von profilierten Schleifschuhen, profilierten Schleifklötzen und profilierten Schleifkontaktwalzen bzw. Schleifrädern verwenden lassen. Zwar weisen die bisher bekannten flexiblen Schleifmittel auf Unterlage in einem gewissen Grade eine Dehnbarkeit auf. Diese Dehnbarkeit genügt aber im allgemeinen nicht, um die Anforderungen, welche bei- 'spielsweise an ein Schleifmittel für den Profilschliff gestellt werden, zu erfüllen. Selbst Schleifmittel auf Gewebeunterlage bei welchen die Dehnbarkeit entsprechend EP 0. 052 866 A3 erhöht wurde, erwiesen sich bei schwierigen Profilen noch als ungenügend. Bei der Verwendung eines elastischen Schleifmittels ist zudem das Ausbrechen des Schleifkorns sehr problematisch,sobald dieses über einen bestimmten Grad gedehnt oder verstreckt wird, einem Verstreckungsgrad wie er etwa vom Profilschliff oft gefordert wird.The object of the invention is to provide abrasives on a flexible and stretchable base, which allow this to adapt well to the workpiece during grinding and in particular during profile grinding. The abrasive according to the invention should be able to be used in particular for the production of profiled grinding shoes, profiled grinding blocks and profiled grinding contact rollers or grinding wheels. The previously known flexible abrasives on a base have a certain degree of extensibility. However, this extensibility is generally not sufficient to meet the requirements that are placed on an abrasive for profile grinding, for example. Even abrasives on a fabric backing, in which the extensibility was increased in accordance with EP 0.052 866 A3, were still unsatisfactory for difficult profiles. When using an elastic abrasive, breaking out of the abrasive grain is very problematic as soon as it is stretched or stretched to a certain degree, a degree of stretching that is often required by profile grinding.

Damit sich ein Schleifmittel auf flexibler Unterlage beispielsweise konturengetreu an einen profilierten Schleifschuh,einen profilierten Schleifklotz, eine profilierte Schleifrolle oder Schleifkontaktwalzeanpassen kann, muss es erstens eine der vorgegebenen Profilform angepasste Dehnbarkeit aufweisen, d.h. das Schleifmittel auf Unterlage muss an überhöhten Stellen oder an Stellen von überhöhten Radien bei vergleichbar geringer Zugkraft und ohne Ausbrechen von Schleifkorn verstreckt werden können. Eine Verstreckung von 40 % oder mehr der ursprünglichen Länge des flächigen Schleifmittels auf Unterlage entspricht einer typischen Anforderung. Wir verweisen auf Zeichung 2, welche später genauer beschrieben wird.So that an abrasive on a flexible base conforms, for example, to a profiled sanding shoe, a profiled sanding block, a profiled sanding roller or First, it must be able to adjust the grinding contact roller, it must have an extensibility that is adapted to the specified profile shape, ie the abrasive on the base must be able to be stretched at elevated locations or at locations of elevated radii with a comparatively low tensile force and without breaking out of abrasive grain. A stretch of 40% or more of the original length of the flat abrasive on the backing corresponds to a typical requirement. We refer to drawing 2, which will be described in more detail later.

In der bereits genannten DE-OS 30 36 991 wird darauf hingewiesen, dass die Herstellung eines elastischen Schleifbandes (mit bisher bekannten Schleifmitteln) wegen der beim Verstrecken zerstörten Schichtung und das dadurch bedingte Ausbrechen der Körner, nicht möglich sei.In the already mentioned DE-OS 30 36 991 it is pointed out that the production of an elastic grinding belt (with previously known abrasives) is not possible because of the layering destroyed during stretching and the resulting breakout of the grains.

Ein flexibles und dehnbares Schleifmittel auf Unterlage, welches nach.dem Verstrecken keine Zerstörung der Beschichtung und kein Ausbrechen des Schleifkorns mehr zeigt, ist überraschenderweise dadurch gefunden worden, dass das Schleifmittel erstens auf einer dehnbaren, textilen Unterlage hergestellt wird, welche zweitens mit einer elastischen Zwischenschicht versehen wird, die zwischen .der textilen Unterlage und den üblichen Grundbindemitteln, auf die Schleifkorn und Deckbindemittel aufgebracht sind, liegt.A flexible and stretchable abrasive on a backing which, after stretching, no longer shows any destruction of the coating and no breaking out of the abrasive grain, has surprisingly been found by firstly producing the abrasive on a stretchable, textile backing, secondly with an elastic intermediate layer is provided, which lies between the textile base and the usual base binders to which the abrasive grain and cover binders are applied.

In der Zeichnung 1 ist ein solches Schleifmittel schematisch illustriert, wobei 1 das Schleifkorn, 2 das Deckbindemittel, 3 das Grundbindemittel, 4 die elastische Zwischenschicht und 5 die flexible und dehnbare textile Unterlage darstellen.Such an abrasive is illustrated schematically in drawing 1, 1 representing the abrasive grain, 2 the cover binder, 3 the base binder, 4 the elastic intermediate layer and 5 the flexible and stretchable textile base.

Die genannte elastische Zwischenschicht besteht beispielsweise aus Polyurethanen, Polyacrylaten, Kautschuklatex und/oder Butadien enthaltenden Polymerisaten, wie etwa Acrylnitril-Butadien-Styrol- oder Butadien-Styrol-Polymerisate (vgl. Butadien-Polymerisate im Kunstofflexikon, 7. Auflage, a.a.0, Seiten 99 und 100) .The elastic intermediate layer mentioned consists, for example, of polyurethanes, polyacrylates, rubber latex and / or butadiene-containing polymers, such as, for example, acrylonitrile-butadiene-styrene or butadiene-styrene polymers (cf. Butadiene-Poly merisate im Kunstofflexikon, 7th edition, aa0, pages 99 and 100).

Gegebenenfalls können diese Polymerisate durch Zusatz von Härtern oder Vernetzern bzw. von härt- oder vernetzbaren Harzen, wie z.B.Phenol-, Melamin-, Resorzin oder Harnstofformalydharze modifiziert werden,um die nötigen Elastizitäts- und Haftungseigenschaften in einem weiten Temperaturbereich zu erhalten. Auch kann die elastische Zwischenschicht anorganische und/oder organische Füllstoffe enthalten.If necessary, these polymers can be modified by adding hardeners or crosslinking agents or hardenable or crosslinkable resins, such as phenol, melamine, resorcinol or urea formaldehyde resins, in order to obtain the necessary elasticity and adhesion properties over a wide temperature range. The elastic intermediate layer can also contain inorganic and / or organic fillers.

Es wurde gefunden, dass die erfindungsgemässe Zwischenschicht eine mehr oder weniger ausgeprägte Elastizität (im Sinne der Beschreibung im Kunststoff-Lexikon 7. Auflage von K. Stockhert, Carl Hanser Verlag 1981, Seite 151) bzw. einen relativ niederen Elastizitätsmodul (nach DIN 53 475) aufweisen und zugleich auf der textilen Unterlage einerseits und dem Grundbindemittel andererseits eine gute Haftung gewährleisten muss. Der an einem Prüfkörper nach DIN 53 457 gemessene E-Modul der erfindungsgemässen Zwischenschicht sollte höchstens 300 N/mm2, bevorzugt aber höchstens 50 N/mm2 betragen. Die erfindungsgemässe Zwischenschicht kann nach üblichen Verfahren beispielsweise als Lösung in einem organischen Lösungsmittel, als wässerige ·Dispersion oder als Schmelze auf die textile Unterlage gebracht und anschliessend getrocknet und gegebenenfalls chemisch vernetzt werden. Es ist auch möglich, die entsprechenden monomeren oder präpolymeren Stoffe auf die Unterlage aufzutragen und anschliessend die Polymerisation und gegebenenfalls die Vernetzung beispielsweise durch Elektronenstrahlen durchzuführen.It was found that the intermediate layer according to the invention has a more or less pronounced elasticity (in the sense of the description in the plastic lexicon 7th edition by K. Stockhert, Carl Hanser Verlag 1981, page 151) or a relatively low modulus of elasticity (according to DIN 53 475 ) and at the same time must ensure good adhesion to the textile base on the one hand and the basic binder on the other. The modulus of elasticity of the intermediate layer according to the invention measured on a test specimen according to DIN 53 457 should be at most 300 N / mm2, but preferably at most 50 N / mm2. The intermediate layer according to the invention can be applied to the textile base by conventional methods, for example as a solution in an organic solvent, as an aqueous dispersion or as a melt, and then dried and, if appropriate, chemically crosslinked. It is also possible to apply the corresponding monomeric or prepolymeric substances to the base and then to carry out the polymerization and, if appropriate, the crosslinking, for example by means of electron beams.

Die Dicke bzw. Menge pro Flächeneinheit der Zwischenschicht ist nicht kritisch, hängt aber in gewissem Grade vom gewünschten Verstreckungsgrad und der Art der textilen Unterlage,d.h. der Eindringtiefe in dieselbe ab. Im allgemeinen erhält man mit Mengen (trocken) zwischen 40 und 120 g/m2 die gewünschten Resul-5 tate.The thickness or amount per unit area of the intermediate layer is not critical, but depends to a certain extent on the desired degree of stretching and the type of textile base, i.e. the depth of penetration into it. In general, the desired results are obtained with amounts (dry) between 40 and 120 g / m 2.

Erfindungsgemäss wird als Unterlage ein in Längs- und/oder Querrichtung bevorzugt dehnbares textiles Flächengebilde mit beispielsweise Fasern aus Cellulose, Celluloseacetat, Polyamid, Polyester, Polyurethan und/oder Kautschukpolymerisaten in Form von beispielsweise Gewebe, Gewirke, Vlies, Gelege oder Mischgeweben oder -gewirken verwendet, das gegebenenfalls beispielsweise antistatisch oder mit Haftmitteln ausgerüstet ist. Es ist auch möglich, ein dehnbares, nicht textiles Flächengebildelwie etwa ein elastisches Filmmaterial zu verwenden. Sol-' che Unterlagen haben sich aber als weniger geeignet erwiesen. Die textile Unterlage, auf die ein- oder beidseitig, die elastische Zwischenschicht aufgetragen wird, kann grössere oder geringere Anteile von Elastomeren, Elasthanfasern, Elastofasern, Elastodienfasern oder -fäden enthalten (vergleiche Kunststoff-lexikon, 7. Auflage, a.a.O., Seite 150-153). E rfindungsgemäss is a longitudinal and / or transverse direction preferably stretchable fabric having, for example, fibers of cellulose, cellulose acetate, polyamide, polyester, polyurethane and / or rubber polymers in the form of, for example, wovens, knits, nonwoven, scrims, or blended fabrics or knitted fabrics as backing used, which is optionally, for example, antistatic or equipped with adhesives. It is also possible to use a stretchable, non-textile fabric 1, such as an elastic film material. Sol 'che documents have been found to be less suitable. The textile underlay on which the elastic intermediate layer is applied on one or both sides can contain larger or smaller proportions of elastomers, elastane fibers, elasto fibers, elastody fibers or threads (compare Kunststoff-lexikon, 7th edition, loc. Cit., Pages 150-153 ).

Auch hochelastische Fasern, die extrem hoch verformbar sind und die eine Reissdehnung von mehr als 200%, üblicherweise von 500-800% aufweisen, lassen sich in der textilen Unterlage, die erfindungsgmäss mit einer Zwischenschicht versehen wird, bevor Grundbindemittel, Schleifkorn und Deckbindemittel aufgetragen werden, mitverwenden.Highly elastic fibers, which are extremely highly deformable and which have an elongation at break of more than 200%, usually 500-800%, can also be found in the textile underlay, which according to the invention is provided with an intermediate layer, before basic binder, abrasive grain and cover binder are applied , use.

In dem als Unterlage für das Schleifmittel verwendeten textilen Flächengebilde in Form eines Gewebes, Gewirkes, Vlieses usw., lassen sich beispielsweise Schuss- und/oder Kettfäden bzw. Garne hoher Elastizität oder Dehnung verwenden. Schuss- oder Kettfäden bzw. Garne hoher Elastizität können nach bekannten Verfahren erhalten werden, beispielsweise durch das Umspinnen einer "Seele" aus elastomeren Fasern mit Baumwollfasern oder der Verwendung von texturierten- oder gekräuselten Fäden oder Garnen.In the textile fabric used as a base for the abrasive in the form of a woven fabric, knitted fabric, fleece, etc., for example, weft and / or warp threads or yarns of high elasticity or stretch can be used. Weft or warp threads or high elasticity yarns can be obtained by known methods, for example by spinning a "core" of elastomeric fibers with cotton fibers or by using textured or crimped threads or yarns.

Das verwendete dehnbare textile Flächengebilde, auf das erfindungsgemäss eine elastische Zwischenschicht aufgebracht wird, kann in allen Richtungen oder nur in einer Richtung dehnbar ausgeführt werden. Vorzugsweise wird es so ausgestaltet, dass insbesondere quer zur Maschinen- oder Längsrichtung (bei einem Gewebe entspricht dies im allgemeinen der Schussrichtung) eine Dehnbarkeit erreicht wird. Das erfindungsgemässe Schleifmittel auf Unterlage weist in längs- und/oder Querrichtung eine Dehnbarkeit von wenigstens 10 % bei einer Zuglast von 100 N/5cm, bevorzugt aber eine solche von wenigstens 25 % bei gleicher Zuglast auf. Die Dehnbarkeit kann auch mittels des beigefügten sog. Kraft/Dehnungsdiagramms dargestellt werden. Im Diagramm der Zeichnung 3 ist die Dehnung oder Verstreckung des Schleifmittels als Funktion der Zuglast dargestellt. Auf der einen Achse ist die Zuglast in N/5cm Streifenbreite und in der anderen die Dehnung in % der ursprünglichen Länge aufgetragen. Im Diagramm sind vier Zuglast/Dehnungslinien oder Kurven dargestellt, nämlich die Kurven A, B, C und D. Die Kurven A und B dienen als Vergleich und entsprechen typischen Werten eines herkömmlichen Schleifmittels auf Unterlage. Kurve A entspricht der Maschinen- oder Längsrichtung, Kurve B der Quer- oder Schussrichtung eines typischen herkömmlichen flexiblen Schleifmittels auf Gewebeunterlage Schleifmittel mit der Markenbezeichnung "SIATUR JJ" der Firma SIA). Die Linien C und D entsprechen dem erfindungsgemässen Schleifmittel, wobei es sich um Grenzlinien handelt. Die Kurven des erfindungsgemässen Schleifmittels sollten im Feld links (doppelt schraf--fierte Seite) der Grenzlinie C oder bevorzugt im Feld links (schraffierte Seite) der Grenzlinie D liegen. Die Bruchlast ist im Diagramm nicht ersichtlich.The stretchable textile fabric used, to which an elastic intermediate layer is applied according to the invention, can be made stretchable in all directions or only in one direction. It is preferably designed such that, in particular an extensibility is achieved transversely to the machine or longitudinal direction (in the case of a fabric this generally corresponds to the weft direction). The abrasive according to the invention on a base has an extensibility in the longitudinal and / or transverse direction of at least 10% with a tensile load of 100 N / 5 cm, but preferably one of at least 25% with the same tensile load. The extensibility can also be shown using the attached so-called force / strain diagram. The diagram of drawing 3 shows the expansion or stretching of the abrasive as a function of the tensile load. On one axis the tensile load is plotted in N / 5cm strip width and on the other the elongation in% of the original length. Four tensile load / strain lines or curves are shown in the diagram, namely curves A, B, C and D. Curves A and B serve as a comparison and correspond to typical values of a conventional coated abrasive. Curve A corresponds to the machine or longitudinal direction, curve B to the transverse or weft direction of a typical conventional flexible abrasive on a cloth base (with the brand name "SIATUR JJ" from SIA). Lines C and D correspond to the abrasive according to the invention, which are boundary lines. The curves of the abrasive according to the invention should lie in the field on the left (double hatched side) of the boundary line C or preferably in the field on the left (hatched side) of the boundary line D. The breaking load is not visible in the diagram.

Als Grund- und Deckbindemittel werden die üblichen Harztypen wie beispielsweise Phenol-Formaldehyd-, Harnstoff-Formaldehyd-, oder Melamin-Formaldehydharze verwendet. Vorzugsweise werden Phenol-Formaldehydharze verwendet. Auch.die üblichen Schleifkörner in üblicher Körnungsgrösse werden erfindungsgemäss verwendet, beispielsweise Korund, Zirkonkorund, Spinellkorund, Siliziumcarbid, Diamant, Ruby, Flint, Schmirgel.The usual resin types such as, for example, phenol-formaldehyde, urea-formaldehyde or melamine-formaldehyde resins are used as base and cover binders. Phenol-formaldehyde resins are preferably used. The usual abrasive grains in the usual grain size are used according to the invention, for example corundum, zirconium corundum, spinel corundum, silicon carbide, diamond, ruby, flint, emery.

Das erfindungsgemässe Schleifmittel eignet sich insbesondere für den Profilschliff bzw. für die Herstellung von Profilschleifvorrichtungen, wie etwa Profilschleifschuhe, Profilschleifklötze oder Profilschleifkontaktrollen oder -walzen. Die genannten Profilschleifvorrichtungen können in wirtschaftlicher Weise unter Verwendung des erfindungsgemässen Schleifmittels hergestellt werden. Die hohe Dehnbarkeit ermöglicht das Anpassen auch an schwierige Profile, wobei die bisherigen aufwendigen Methoden, wie etwa das Aufschneiden, das Anbringen von Stauchrillen, die Verwendung von Segmenten mit elastischen Verbindungsstreifen und anderes mehr sich erübrigt. Zeichnung 2 zeigt beispielsweise einen Querschnitt einer aus dem erfindungsgemässen flexiblen und elastischen Schleifmittel hergestellten Profilschleifkontaktwalze. 8 zeigt den eigentlichen Profilkörper, der mit dem erfindungsgemässen Schleifmittel 6 überzogen ist. 1 stellt das Schleifkorn und 7 die Schleifmittelunterlage dar. Der Umfang der Zone mit dem grössten Radius des Profils (A) ist rund 40 % grösser als derjenige in der Zone mit dem kleinsten Radius (B). Die Profilkontaktwalze ist auf die Aufnahme und Antriebsvorrichtung 9 aufgebracht und mittels Teil 10 und Schraube 11 fixiert. Die Herstellung des Profilkoni taktwalzenkörpers 6 + 8 kann in verschiedener Weise geschehen.. Der Profilkörper 8 kann entweder separat, beispielsweise aus Holz oder Kunststoff nach bekannten Verfahren hergestellt und -darnach das Schleifmittel 6 beispielsweise durch Aufkleben aufgebracht werden oder aber der Schleifkörper 8 kann mit dem 5 aufgezogenen Schleifmittel 6 gleichzeitig beispielsweise nach dem Spritzgussverfahren aus Polyurethan Hartschaum hergestellt werden.The abrasive according to the invention is particularly suitable for profile grinding or for the production of profile grinding devices such as profile sanding shoes, profile sanding blocks or profile sanding contact rollers or rollers. The profile grinding devices mentioned can be produced economically using the abrasive according to the invention. The high degree of elasticity enables it to be adapted to difficult profiles, eliminating the previous elaborate methods such as cutting open, making compression grooves, the use of segments with elastic connecting strips and much more. Drawing 2, for example shows a cross section of a P produced from the inventive flexible and resilient abrasive rofilschleifkontaktwalze. 8 shows the actual profile body which is coated with the abrasive 6 according to the invention. 1 represents the abrasive grain and 7 the abrasive pad. The circumference of the zone with the largest radius of the profile (A) is around 40% larger than that in the zone with the smallest radius (B). The profile contact roller is applied to the receptacle and drive device 9 and fixed by means of part 10 and screw 11. The production of the Profilkoni contact roller body 6 + 8 can be done in various ways. The profile body 8 can either be made separately, for example from wood or plastic according to known methods, and then the abrasive 6 can be applied, for example by gluing, or the abrasive body 8 can be used with the 5 mounted abrasives 6 can be produced simultaneously from rigid polyurethane foam, for example by the injection molding process.

Die Beispiele erläutern die Erfindung.The examples illustrate the invention.

0 Beispiel 10 Example 1

Es wurde ein Vlies aus Polyamidfasern mit einem Flächengewicht von 135 g/m2, welches in Längsrichtung eine Bruchdehnung von 65 % und in Querrichtung von 90 % aufwies mit einer 50 %igen Dispersion eines Mischpolymerisates auf der Basis von Butadien 5-und Styrol beschichtet. Die Dispersion wurde mit einem Rakel in einer Menge von 120 g/m2 (nass) vorgenommen und anschliessend 2 Minuten bei 120°C in einem Flachtrockner getrocknet. Dieses mit der elastischen Zwischenschicht versehene Polyamidvlies wurde nun als Unterlage für ein flexibles Schleifmittel verwendet. Als Grundbindemittel für das Schleifkorn wurde ein wässriges Phenol-Formaldehyd-Resol, welches mit 20 % Kalksteinmehl gefüllt worden war verwendet, der Festkörpergehalt betrug 62 %. Das Phenolharz wurde im Walzenauftragsverfahren auf die beschichtete-Seite des Polyamidvlies aufgebracht in einer Menge von 70 g/m2. In diese Beschichtung wurden 165 g/m2 eines handelsüblichen Aluminiumoxid-Schleifkorns (Korn.-Nr. P 120) eingestreut.'Der Streuvorgang geschah nach dem heute in der Schleifmittelindustrie üblichen elektrostatischen Streuverfahren. Anschliessend wurde das bestreute Vlies girlandenförmig aufgehängt und das Grundbindemittel 15 Minuten bei 80°C,15 Minuten bei 95°C ' und 20 Minuten bei 120°C getrocknet und gehärtet. Mit einer weichen Gummiwalze wurde das Deckbindemittel in einer Menge von 260 g/m2 aufgetragen. Dieses bestand aus dem gleichen Phenol-Formaldehyd-Resol wie der Grundbinder, aber der Füllstoffanteil betrug 50 %. Der Deckbinder wurde wie der Grundbinder im Hängetrockner getrocknet und gehärtet. Das ausgehärtete Schleifmittel wurde geflext, d.h. der harte Phenolharz-Korn-Belag in kleine Segmente gebrochen. Die Prüfungen am fertigen Schleifmittel zeigten, dass die am Vlies gemessenen hohen Dehnungswerte auch beim Schleifmittel noch vorhanden sind. So betrug beispielsweise die Dehnung in Querrichtung bei einer Zuglast von 100 N/5cm 40 %. Die Haftung des Schleifbelages ist sehr gut und entspricht einem konventionellen Schleifmittel mit geringer Dehnung. Das Schleifmittel konnte konturengetreu auf einen Profilschleifklotz aufgeklebt werden, wobei dieses in einzelne Zonen bis zu 40 % verstreckt wurde.A nonwoven made of polyamide fibers with a weight per unit area of 135 g / m2, which had an elongation at break of 65% in the longitudinal direction and 90% in the transverse direction, was coated with a 50% dispersion of a copolymer based on butadiene 5 and styrene. The dispersion was carried out with a doctor blade in an amount of 120 g / m 2 (wet) and then connected Send dried in a flat dryer at 120 ° C for 2 minutes. This polyamide fleece with the elastic intermediate layer has now been used as a base for a flexible abrasive. An aqueous phenol-formaldehyde resol, which had been filled with 20% limestone powder, was used as the basic binder for the abrasive grain; the solids content was 62%. The phenolic resin was applied in a roll application process to the coated side of the polyamide fleece in an amount of 70 g / m 2. 165 g / m2 of a commercially available aluminum oxide abrasive grain (grain no. P 120) was sprinkled into this coating. The spreading process was carried out using the electrostatic spreading method that is common in the abrasives industry today. The sprinkled fleece was then hung in a garland shape and the basic binder was dried and cured at 80 ° C. for 15 minutes, at 95 ° C. for 15 minutes and at 120 ° C. for 20 minutes. The cover binder was applied in an amount of 260 g / m 2 using a soft rubber roller. This consisted of the same phenol-formaldehyde resole as the basic binder, but the filler content was 50%. Like the basic binder, the cover binder was dried and hardened in a hanging dryer. The hardened abrasive was flexed, ie the hard phenolic resin grit was broken into small segments. The tests on the finished abrasive showed that the high elongation values measured on the fleece are still present in the abrasive. For example, the elongation in the transverse direction was 40% with a tensile load of 100 N / 5cm. The adhesion of the abrasive coating is very good and corresponds to a conventional abrasive with little stretch. The abrasive could be glued true to the contour on a profile sanding block, whereby this was stretched up to 40% in individual zones.

Beispiel 2Example 2

Für die Herstellung eines flexiblen und elastischen Schleifmittels wurde als Unterlage ein 150 g/m2 schweres schusselastisches Gewebe verwendet. Es handelt sich um ein Baumwollgewebe in Leinwandbindung, dessen Schussfäden durch Umspinnen einer Lycra-Faser-"Seele" mit Baumwolle hergestellt wurden. Das Verhältnis Baumwolle zu Lycra betrug 90 : 10. Dieses Gewebe wurde mit einem Rakel beschichtet mit 120 g/m2 einer 50 %igen Dispersion von thermisch vernetzbaren Mischpolymerisaten auf Basis von Acrylsäureester.. Die Beschichtung wurde im Flachtrockner 2 Minuten bei 130°C getrocknet. Der Aufbau des Schleifbelages war der gleiche wie in Beispiel 1, es wurde jedoch ein Schleifkorn der Grösse P 80 verwendet. Die Prüfungen zeigten, dass die hohe Dehnbarkeit des Ausgangsgewebes beim fertigen Schleifmittel noch vorhanden war. Die Dehnungswerte betrugen bei einer Zuglast von 100 N/5cm 30 %, bei 200 N/5cm 45 %. Die Kornhaftung erwies sich auch nach dem Verstrecken und Herstellen einer Profilschleifkontaktwalze entsprechend Zeichnung 2 als sehr gut.For the production of a flexible and elastic abrasive, a 150 g / m2 weft-elastic fabric was used as the base. It is a cotton fabric in plain weave, the weft threads of which are spun from a Lycra Fa ser- "soul" were made with cotton. The ratio of cotton to lycra was 90:10. This fabric was coated with a doctor blade with 120 g / m2 of a 50% dispersion of thermally crosslinkable copolymers based on acrylic acid ester. The coating was dried in a flat dryer at 130 ° C. for 2 minutes. The structure of the abrasive coating was the same as in Example 1, but a size P 80 abrasive grain was used. The tests showed that the high elasticity of the original fabric was still present in the finished abrasive. The elongation values were 30% at a tensile load of 100 N / 5cm and 45% at 200 N / 5cm. Grain adhesion proved to be very good even after stretching and producing a profile contact roller according to drawing 2.

Beispiel 3Example 3

Ein Gewebe mit hochelastischem texturiertem Polyester-Filamentgarn-Schuss und Baumwollkette in Köperbindung mit einer Flächengewicht von 200 g/m2 wurde beschichtet mit einer Polyacrylester-Dispersion. In zweimaligem Durchgang wurde die 40 %ige Dispersion mit dem Rakel in Mengen von je 80 g/m2 (nass) und beide Male bei 120°C 2 Minuten getrocknet. Auch hier war der Aufbau des Schleifmittelbelages der gleiche wie in Beispiel 1. Die Dehnbarkeit in Querrichtung des fertigen Schleifmittels 5 veränderte sich gegenüber dem rohen Gewebe kaum. Die Dehnung bei 80 N/5cm Schussrichtung betrug 24 % und die Kornhaftung war einwandfrei.A fabric with a highly elastic textured polyester filament weft and cotton warp in twill weave with a basis weight of 200 g / m2 was coated with a polyacrylic ester dispersion. In two passes, the 40% dispersion was dried with a doctor blade in amounts of 80 g / m 2 (wet) and both times at 120 ° C. for 2 minutes. Here too, the structure of the abrasive coating was the same as in Example 1. The extensibility in the transverse direction of the finished abrasive 5 hardly changed compared to the raw fabric. The elongation at 80 N / 5 cm weft direction was 24% and the grain adhesion was perfect.

Claims (12)

1. Schleifmittel auf dehnbarer und flexibler Unterlage,enthaltend eine textile Unterlage, eine auf der Kornseite der Unterlage aufgebrachte Zwischenschicht, Grundbindemittel, Schleifkorn und gegebenenfalls eine oder mehrere Deckbinde- mittelschichtenfdadurch gekennzeichnet, dass die textile Unterlage dehnbar ist und die Zwischenschicht elastische Polymere enthält.1. Coated abrasives stretchable and flexible U nterlage containing a fabric backing, a layer applied on the grain side of the base intermediate layer, base binder, abrasive grain and, optionally, one or more Deckbinde- f middle layers characterized in that the textile substrate is extensible and the intermediate layer elastic polymers contains. 2. Schleifmittel nach Anspruch 1, dadurch gekennzeichnet, dass die Zwischenschicht zwischen der textilen Unterlage und dem Grundbindemittel Elastomere enthält.2. Abrasive according to claim 1, characterized in that the intermediate layer between the textile base and the base binder contains elastomers. 3. Schleifmittel nach Ansprüchen 1 - 2, .dadurch gekennzeichnet, dass die Dehnbarkeit in längs- und/oder in Querrichtung bei einer Zuglast von 100 N/5 cm wenigstens 10 % bevorzugt aber wenigstens 25 % beträgt.3. Abrasives according to claims 1-2, characterized in that the extensibility in the longitudinal and / or in the transverse direction at a tensile load of 100 N / 5 cm is at least 10% but preferably at least 25%. 4. Schleifmittel narh Ansprüchen 1 - 3, dadurch gekennzeichnet, dass die elastische Zwischenschicht mit Hilfe von Kautschuklatex und/oder Polyurethan und/oder Butadien und/oder Acrylsäureester enthaltenden Polymerisaten hergestellt wird.4. Abrasives according to claims 1-3, characterized in that the elastic intermediate layer is produced with the aid of rubber latex and / or polyurethane and / or butadiene and / or acrylic acid-containing polymers. 5. Schleifmittel nach Ansprüchen 1 - 4,dadurch gekennzeichnet, dass der Elastizitätsmodul der elastischen Zwischenschicht höchstens 300 N/mm2,bevorzugt aber höchstens 50 N/mm2 beträgt.5. Abrasive according to claims 1-4, characterized in that the elastic modulus of the elastic intermediate layer is at most 300 N / mm2, but preferably at most 50 N / mm2. 6. Schleifmittel nach Ansprüchen 1 - 5,dadurch gekennzeichnet, dass die textile Unterlage die die elastische Zwischenschicht trägt, Fasern aus Cellulose, Celluloseester, Polyamid, Polyester, Polyurethan- und/oder Kautschukpolymerisate enthält.6. Abrasive according to claims 1-5, characterized in that the textile base which carries the elastic intermediate layer contains fibers made of cellulose, cellulose ester, polyamide, polyester, polyurethane and / or rubber polymers. 7. Schleifmittel nach Ansprüchen 1 - 6, dadurch gekennzeichnet, dass die textile Unterlage, die die Zwischenschicht trägt, Elasthanfasern, -fäden, Elastodienfasern oder Elastofasern enthält.7. Abrasive according to claims 1-6, characterized in that the textile base, which carries the intermediate layer, contains elastane fibers, threads, elastody fibers or elastomer fibers. 8. Schleifmittel nach Ansprüchen 1 - 7, dadurch gekennzeichnet, dass als textile Unterlage ein Gewebe, Gewirke, Vlies und/ oder ein Gelege verwendet und diese mit einer elastischen Zwischenschicht versehen wird.8. Abrasive according to claims 1-7, characterized in that a fabric, knitted fabric, fleece and / or a scrim is used as the textile base and this is provided with an elastic intermediate layer. 9. Verfahren zur Herstellung von Schleifmitteln auf flexibler . und dehnbarer Unterlage, dadurch gekennzeichnet, dass eine textile, dehnbare Unterlage mit einer elastischen Zwischenschicht beschichtet und auf dieser Zwischenschicht in üblicher Weise Grundbindemittel, Schleifkorn und Deckbindemittel aufgebracht werden.9. Process for making abrasives on flexible. and stretchable underlay, characterized in that a textile, stretchable underlay is coated with an elastic intermediate layer and basic binder, abrasive grain and cover binder are applied to this intermediate layer in the usual way. 10. Verwendung des Schleifmittels auf flexibler und dehnbarer textiler Unterlage nach Ansprüchen 1 - 8, für den Profilschliff.10. Use of the abrasive on a flexible and stretchable textile base according to claims 1-8, for profile grinding. 11. Verwendung des Schleifmittels nach Ansprüchen 1-8 für die Herstellung von profilierten Schieifklötzen, Schleifschuhen und Schleifkontaktwalzen.11. Use of the abrasive according to claims 1-8 for the production of profiled grinding blocks, grinding shoes and grinding contact rollers. 12. Verwendung nach Ansprüchen 10 und 11. zum Schleifen von Profilen aus Holz oder Kunststoff.12. Use according to claims 10 and 11. for grinding profiles made of wood or plastic.
EP83111552A 1982-11-22 1983-11-18 Abrasive product with an extensible and flexible backing, method for its manufacture and its use Expired EP0111765B1 (en)

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AT83111552T ATE47069T1 (en) 1982-11-22 1983-11-18 ABRASIVES ON EXPANDABLE AND FLEXIBLE BACKING, METHOD OF PRODUCTION AND USE OF THE SAME.

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CH6768/82A CH669138A5 (en) 1982-11-22 1982-11-22 ABRASIVES ON EXTENDABLE AND FLEXIBLE BASE.
CH6768/82 1982-11-22

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US4606154A (en) 1986-08-19
ATE47069T1 (en) 1989-10-15
CH669138A5 (en) 1989-02-28
EP0111765B1 (en) 1989-10-11
EP0111765A3 (en) 1985-11-27
DE3380688D1 (en) 1989-11-16

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