DE2333980A1 - Wide dimensionally stable grinding belts - composed of paper textile or fibrous underlay laminated to woven web with yarn bias - Google Patents

Abstract

Laminated web is composed of an underlay (b) of paper, matted web, fibres, textile or laminated textile paper web and a component (a) having fibres which extend at an angle of from 10 to 80 degrees wrt the longitudinal and transverse axis of the underlay. Used for mfg. excessively wide grinding belts which are dimensionally stable principally in the longitudinally and transverse direction. The textile component (a) may be formed by a hose in which the filaments extend at 45 degrees following bias slitting at that angle. In another embodiment the component may be formed by a triaxial woven fabric disclosed in OLS 1535442. In a further embodiment the component may be formed by endless monofil or multifil synthetic yarns having a high tensile strength.

Description

COHAUSZ & FLORACK

PAT E NTANWALT S OFFICE 4 DÜSSELDORF 8CHUMANN8TR, 97

2333930

PATENT LAWYERS: Dipl.-Ing. W. COHAUSZ ■ Dipl.-Ing. W. FLORACK Dipl.-Ing. R. KNAUF Dr.-Ing., Dipl.-Wirtsch.-Ing. A. GERBER

Carborundum-Werke GmbH

4 Düsseldorf-Reisholz July 3, 1973

Web-shaped composite material for the production of extra-wide abrasive belts

The invention relates to sheet-like composite material for the production of wide abrasive belts, which is intended for this purpose is to be divided into parallelogram-shaped segments, which then with their longer edges to the sanding belt be connected so that the seams and junctions run at an angle to the direction of movement of the finished sanding belt.

The joining of the segments of a web-shaped fabric to the sanding belt is due to the requirement for large widths, in particular over 1.3 m. For sanding belts with a The production widths of most systems for the manufacture of abrasives are greater than about 1.3o m is no longer enough to produce tapes with only one glue point.

Since normal abrasive twill has a lower strength in the weft direction, it is preferred to use wide belts of this type Fabric in atlas weave (DAS 1 427 569).

4Q9884 / Q184

Other wide belts manufactured with partial or full synthetic resin bonding, which are preferably to be used for processing wood-based materials, are placed on a base made of a paper-fabric combination manufactured. The fabric used here is preferably a linen-weave cotton creton, which is in The warp and weft directions preferably have the same breaking strength. If necessary, however, you can also use a fabric insert reinforced weft thread.

However, tapes based on these documents have some principal ones Disadvantage. Since for the sake of the desired cut, the If tape fasteners have to be attached at an angle to the running direction, one is forced to cut the segments in order to avoid high material losses cut in parallelogram shape and glued in such a way that weft and warp threads are each angled to the running direction of the finished product Sehleifbandes run. As a result of this construction, such grinding belts have an increased elongation in their running direction and decreased breaking strength. This disadvantage is only caused by the paper lamination and the resulting benefits Dimensional stability slightly reduced.

Another disadvantage is that the most commonly used fabric in Linen weave has a maximum number of crossing points.

The object of the invention is to strive for a port step in the field of wide grinding belts in that a Starting material is made available, which enables both an increase in the quality of the finished wide grinding belts as well as in the production of the raw material offers considerable advantages in terms of production technology.

The quality progress can in particular in reduced elongation and increased breaking strength in the running direction of the finished sanding belt as well as in improved dimensional stability, in particular

409884/0184 " ³ "

Avoid wrinkling, be seen.

According to the invention, this primary material should be a composite material consisting of a textile component (a) and a conventional base (b), and its special feature should be that component (a) has threads running at an angle to the longitudinal direction and to the transverse direction of the web, wherein the deviation of the thread direction from the longitudinal direction of the web is between 10 and 80 °.

from Under "textile component (a)" should not only consist of / threads - Preferably endless - planar structures are understood, which consist of materials conventional for this purpose, but preferably also those made from monofilament or multifilament synthetic yarns of high tensile strength. In addition, there are also inorganic ones Fibers, such as glass fibers, can be considered as the starting material for component (a).

According to a particular feature of the invention, there is the component (a) from a tubular fabric. It is suitable for the inventive This is especially useful when it is cut open at an angle of 45 ° to the imaginary axis of the "hose". Will it is then put together in the form of parallelogram segments to form a wide abrasive belt so that the segments can be cut with ease it is ensured that the threads of the tubular fabric run in the running direction of the finished sanding belt and perpendicular to it.

According to another special feature of the invention, component (a) consists of a triaxial fabric. The threads of this fabric run essentially at an angle to one another in three directions. A special design of such three-axis belts is shown, for example, in German Offenlegungsschrift 1.535.442,

According to a further special feature of the invention, there is Component (a) consists of a scrim, the threads of which have the orientation required in principle according to the invention. In this

409884/0184

Case there is a particularly great possibility, the direction of the course of the Pasern - according to the one in the finished Volume made demands - to vary.

In all embodiments it is preferable that by arrangement of the threads in the textile component (a) and optionally the parallelogram cut is effected that threads of the textile Components in the finished sanding belt run in the direction of movement of the sanding belt or approximately to it.

The component (a) can be reinforced by finishing.

The manufacturing possibilities are not limited to the arrangement of known methods for connecting textiles Components with the above-mentioned component (b). There are also a number of possibilities of the manufacturing process to be largely redesigned and rationalized in the process. A proposal according to the invention is that the production of the composite material used operations such as lamination, finishing and impregnation in one operation be combined by first separating component (a) together with component (b) into a binder, preferably a plastic mix, shrink, then both Components squeezed together and during the subsequent trooken process glued and, if necessary, additionally coated.

Another, particularly advantageous production method is that when using paper or fleece as component (b) the production of the composite material with the method of paper or Nonwoven production is combined, preferably such that one component (a) is allowed to run into the wire of a paper or nonwoven machine and the paper or nonwoven fibers on component (a) separates, if necessary with the addition of binding agent. It is also beneficial to use the paper or fleece fibers Application to the sieve to give an orientation, the

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Orientation is chosen so that it later coincides with the direction of travel of the tape matches.

When using thread layers as component (a), it is a preferred way of producing the sheet-like composite material, that a component (b) is coated with a binding agent, a scrim is produced on this base and this connects to the base during the subsequent drying process.

Composite tapes according to the invention are shown schematically in the drawing shown.

Show it:

Fig. 1 shows a tubular fabric with a thread course and cutting lines

2 shows a cut tubular fabric or a biaxial one Scrim;

5 shows a three-axis fabric or scrim;

4 shows a section through composite material.

The abrasive belt can be covered in the usual way, e.g. by applying a binding agent to component (a). But it can also be the sanding belt with flat abrasives, e.g. sandpaper, can be laminated.

Patent claims:

409884/0184

Claims (11)

COHAUSZ & PLORACK PAT B NTANWALT S OFFICE 4 DÜSSELDORF SCHUMANNSTR. 97 PATENT LAWYERS: Dipl.-Ing. W. COHAUSZ Dipl.-Ing. W. FLORACK Dipl.-Ing. R. KNAUF · Dr.-Ing., Dipl.-Wirtsch.-Ing. A. GERBER claims: 1. J Web-shaped composite material for the production of over- wide abrasive belts, which are put together from segments of the raw material are and from a textile component (a) and a base (b), such as paper, fleece, fiber, fabric or paper-fabric combinations consist, characterized in that the component (a) is angled to the longitudinal direction and to the transverse direction the web has threads running, the deviation of the thread direction from the longitudinal direction of the web being between Io and 80 amounts to. 2. Composite material according to claim 1, characterized in that component (a) consists of a tubular fabric, which is preferably is cut open at an angle of 45 °. 3. Composite material according to claim 1, characterized in that component (a) consists of a triaxial fabric. 4. Composite material according to claim 1, characterized in that component (a) consists of a scrim. 5. Composite material according to one of claims 1-4, characterized in that that component (a) is made from - preferably endless monofilament or multifilament synthetic yarns of high tensile strength- existence exists. 409884/0184 6. Composite material according to one of claims 1-5 »characterized in that component (a) is reinforced by finishing is. 7. A method for producing a composite material according to any one of claims 1-6, characterized in that component (a) is connected to the base in a manner known per se. 8. Discarding to produce a composite material according to a of claims 1-6, characterized in that the operations used for production, such as lamination, finishing and impregnation, can be combined in one operation by first separating component (a) together with component (b) into one Allows binding agent, preferably a plastic mixture, to run in, that both components are squeezed together and the subsequent Drying process glued and, if necessary, additionally coated. 9. A method for producing a composite material according to a of claims 1-6 using paper or fleece as a base, characterized in that the method for its production is combined with the process of papermaking, preferably in such a way that component (a) is on the wire of a The paper or fleece machine runs in and the paper or fleece fibers are deposited on component (a), if necessary with addition of binders. 10. The method according to claim 9, characterized in that the paper or nonwoven fibers when applied to the sieve a 409884/0184 _ ₅ _ Gives orientation, the orientation being chosen so that it later coincides with the direction of travel of the tape. 11. A method for producing a composite material according to claim 4, characterized in that one component (b) coated with a binding agent, on this base a layer of threads is created and this during the subsequent drying process connects to the base. A09884 / 0184