DD201652A5 - FLEXIBLE COATED GRINDING FOIL - Google Patents

Abstract

A flexible coated abrasive sheet material having abrasive grains adhesively bonded to at least one side of a backing comprising at least one array of non-interlaced substantially coplanar and coparallel reinforcing textile yarns, said textile yarns, together with the yarns of all other distinct arrays, if any, furnishing most of the tensile strength of said coated abrasive in at least one direction in the plane of said flexible coated abrasive sheet material, each said one or more distinct arrays being of non-interlaced, substantially coplanar and coparallel reinforcing textile yarns present in the backing and oriented in the same direction.

Description

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FLEXIBLE OWNERSHIP

Field of application of the invention :

The invention relates to immediately applicable Schleifproduk te, which consist of a flexible pad in which on at least one side abrasive powder is applied, these products are referred to in the art as abrasive cloth; and, more particularly, it relates to endless abrasive belts made from such sole crops.

Characteristic of the known technical solutions ;

Abrasive fabrics in general were made on bases consisting of paper, cloth, leather, plastic films and metal sheets. Apart from special applications, the majority of all abrasive cloths are produced on paper or textile substrates.

Schieifgewebe, which are often exposed to high voltages in use, are made on solid paper, Yulkanfiberunterlagen or, for the sake of strength and flexibility, fabric underlays · Also laminates of various materials were used in the patent literature is informed, «

In connection with the use of fabric as backing for abrasive products and especially for tapes, problems such as

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voltage characteristics ,. which due to the tissue, the. repeated α, curvature of the yarns inherent and unavoidable, caused by the concatenation of the material ,, and the weakening of the material in best immtea situations due to the inevitable presence of "kinks" on. the crossing points, in. Yarn kinks are the small abutments that occur on the surface of a fabric, caused by the curving of threads. Transition over other threads, caused · The presence of such kinks is considered as the cause of the catastrophic. Failure of abrasive fabric products, especially: tapes, considered for certain heavy sanding operations *

The Desirable Properties Of Web Textiles As Material For. the backing of abrasive fabrics is maintained and many of the undesirable properties are eliminated in the present invention by the use of an array of substantially coplanar and co-parallel synthetic threads which are not interwoven but otherwise incorporated into the structure of the abrasive fabric.

Object of the invention :

Theoretically ideal properties for abrasive fabrics would be expected from underlays where the arrangement of yarns is exactly coplanar and co-parallel. But such an arrangement of yarns is neither practical nor necessary to derive IT benefits from the practice of this invention.

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Explanation of the essence of the invention :

For the purpose of the present invention, an arrangement of threads is substantially coplanar if all the threads of the assembly can be accommodated in the space between two parallel planes which are spaced apart by a distance four times the average diameter of the threads in the assembly. An arrangement is substantially co-parallel when the maximum angular difference in direction between any two threads in the array is not more than thirty degrees.

The use of such fabrics as stitchbonded fabrics or adhesively bonded layers of oriented yarns can eliminate many of the drawbacks mentioned above in connection with the use of conventional woven fabrics.

This eliminates the stretch and fracture problems caused by the presence of kinks in the tissue.

a significant advantage of non-woven fabrics when used as a substrate for abrasive fabrics is the fact that these fabrics can be produced at far greater speed than conventionally woven fabrics, thereby increasing productivity and reducing manufacturing costs.

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In order to refer specifically to Ilalimon sewing fabrics, these fabrics are produced by laying fill yarns over warp yarns and, with a third thread, sewing, warp and weft yarns. Due to the space requirement for the numerous Hähnade In, there is an upper limit for the number of warp threads per inch for such fabrics. The greater openness, associated with the use of solid, multifilament yarns, allows one to create fabrics with a more open construction than conventional woven: textiles for use with abrasive fabrics. lower weight than the conventional woven fabrics of equal or lower strength and strength, thereby allowing economical use of raw materials. Thus, special processes may be required to fill the seams between the yarns in these fabrics. The overall production of: abrasive fabric of knit fabrics, however, is substantially similar to that of conventional fabric.

The steps of sizing yarn, filling or finishing, saturating, sizing the front, applying one. "Coating, application of abrasive, and finally application of a" sand-like "coating can also be used in the production of abrasive fabrics from malimo or knit fabrics.

Adhesively bonded fabrics can be made in the same manner as stitchbonded fabrics, but at the

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Place in production, where in this case the third thread is used for sewing warp and weft threads, a suitable adhesive is used »

Likewise, the thermally bonded fabrics can be made by the application of heat to the joints of warp and weft yarns to melt or soften the yarns or a coating previously applied to the yarns.

In some cases, it may be desirable to include a thin sheet of tissue between warp and fill yarns to permit the backfill treatment to penetrate too deeply into the fabric. .This can be done in the Malimomachine during the production of the underside «,

Instead of oriented filling yarns, a random pile of filling yarns can be used, as with. Maliwatt forms of malignant tissue is the case (in contrast. To, Malimo-Syj)). Such a pile should be selected to contain fibers that provide sufficient area for good adhesion. There are machines (model 14-001, for example) on which tissues of both the Malimo and Maliwatt strains can be made. ':;:;:S; ^

The present invention is particularly suitable for the production of abrasive cloth material suitable for the

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The ability to control the longitudinal strength and elongation properties of the material is important in this context. a fabric in the warp direction is not always through, adding the strength of the individual. Warp yarns and the stretch properties almost never can be predicted from the elastic elongation of the individual yarns, these properties can be more easily controlled and predicted in the fabric designs used in the present invention. In addition, it is not necessary to use the non-woven backing as here The tendency of sole fabric tapes to split under the influence of tensions due to the effect of woven killer yarns (lap) during use is described. By "non-entangled backing" is meant a backing enhanced by non-entangled arrays of substantially coplanar and co-parallel threads as described above.

The particular sizing agents are not critical, and many variations are possible provided adequate coverage and adhesion are achieved *

Important aspects of the treatment are good adhesion to the substrate, adequate filling of the fabric and preparation of the surface for the coating that holds the abrasive, as well as adequate bonding of the yarns so that the end product of a yarn

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Separation of the layers, splitting and biting "is also an appropriate flexibility for the intended Indanwendung is important. Consequently, the particular chemical structure of the treatment compositions is not critical, insofar as it does not affect the above-mentioned physical properties. ^:

Other methods may also .werden used as the Malimomaschine to share the arrangements of yarns heart us that are _e for -the production never htverweb t s support pads of slugs For example, cut cross yarns can at length on '.a - Arrangement of warp yarns, for example, at right angles, for which a suitable llaschine can be used or by manual work V J> the warp yarns and the over-laid yarns, then "by e: in-Hähgarn or by adhesion bond solidified · In US-PS An adhesively bonded fabric of this type is described in US Pat. No. 2,350,655. Other machines are known which wind a (so-called) yarn assembly about the longitudinal warp yarns which are arranged in an Eohr configuration Machines or methods, such as the SchuBeinführungSdiaschinen be used to produce Iradenanordnungen that are suitable for the present: Brfindang ·

The preferred material for the warp yarns herein is a continuous polyester yarn of relatively high strength and low elongation properties. It is obvious that other yarns of the same or similar

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Higher strength and equal or lower elongation under load can be used for less critical applications. Yarns with lower strength and higher elongation are used, the other advantages of the present invention; remain" .

The various organic synthetic yarns can lift glass or metal yarns as a rope or for the whole. loading arrangement can be used.

The preferred yarns in the hauling direction are textured: synthetic yarns siifc continuous; Thread, as in the example below. Can be used natural and synthetic staple fiber yarns. Yarns are particularly useful throughout)]]. Thread ,, when they are _textured; one, wrong one. Twist: provided, become or otherwise: so; "that they have a high bulkiness or -effective surface» dam.it achieved a good adhesion to the Behandlungsiaaterialien

Cause guidance ;

The following; Examples are specific embodiments of the invention. , :.

example 1

This example, a preferred construction, works with a fyp-knitted backing backing such as he

- Q -

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in Fig. 9 of IB-IB 2 890 579 is shown. The fabric for the Ausführungsbeispiei was prepared on a Malimomaschine (available from Unitechna Außenhandelsgesellschaft mbH, -108 Berlin, Mohrenstraße

53 / 54-, DDE) * The approx. 4-inch (100 mm) wide clamping frame for the pi-yarns has 61 ends and performs a complete cycle from one edge of the 5 ¹ IORS and backwards for each 4 Zoll inch Yorward motion of the IFlors. For a 60-inch (1524-mm) machine, this results in a weft which crosses the warp yarns in one direction at an angle of about 88 ° and 92 ° in the other direction. In the case of the threads, the warp with the weft connect, is a continuous polyester thread to 70 denier. The embroidery length is 1.2 mm. The warp yarns are continuous polyester yarns of the 2? Yps duPont68 of high tenacity and 1000 denier (9.2 g per denier breaking strength), and the warp count is 14 ends per inch. The J ¹ UIl- D.der weft yarns are continuous polyester filaments to 170 denier (33 Päden) by Celanese Corporation, IYP 73 "^ · These yarns have a low rotation and are textured to provide a bulky yarn for optimum adhesion of the later The tensile strength is 3.5 to 3.9 g / denier, and the elongation at break is 18 to 24%, and the yarn is preferably not treated with oil.

The backing described above was then impregnated with a resin and an acrylic slurry to prepare it for filling, backfilling, and coating with a grain and finish coating. The heat-setting step is accompanied by drying of the seed.

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combined. The steps of fabric handling are detailed in nan "

Saturation and heat fixation

Standard Calibration Rolls are used to apply the following composition in an amount of 3 to 4 pounds per egg (330 feet - 30,657 m ² ) of sandpaper. "The fill yarn side of the fabric is facing up."

saturation composition

Cjmel 482, available from American Cyanamid, a 80 % solids melamine-formaldehyde resin syrup, pH 8 to 9 160 parts.

Beetle 7238, available through the American Oyanamid, a urea-formaldehyde resin syrup 124 parts

Water 120 parts

Aqueous solution with 15 % ΈΕ ^ ΟΙ and 24 % 2-amino-2-methylpropanol 13 parts

For dyeing the backing, 5 to 7 parts of pigment dispersion can be added «

After the saturant has been applied, the fabric is dried on a drum dryer for at least 3 minutes in a hot air oven, in which

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the temperature in the inlet zone 205 F (about 96 ° C) and in the outlet zone 350 ° F (about 177 ° C) · A tension of at least 2 Efd./Zoll width acts on the fabric during the transit time through the oven on. In this process not only the saturant dries, but also the thermal bonding of the fabric takes place.

Front fillings;

The front filler coating, on the Füllgarnseite in this. Example is applied, but can also be applied to the warp yarn side if desired, has the following composition:

(1) Phenolformaldeir / dresol resin syrup of Bladder A having a ratio of formaldehyde to phenol of 1.5 and a solid content

from 78 % 199! hurry

(2) CaCO ₃ 160 file

(3) Hatrium lauryl sulfate 2 ropes

O) Bycar 2600 χ 138, a latex of an acrylic acid ester polymer having a glass transition temperature of 25 C, available from B »F. Goodrich Chemical Company 54

The composition for the front filling coating is applied with a Eastenmesser in an amount of 10 to 11 lbs / Ries, and water can in the required

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MaJSe be added to achieve the necessary viscosity for the coating · The coated material is again on a. Dried dryer, wherein the tension is at least 2 lb./in. Width and the material is passed through a convection oven having an inlet temperature of 205 ° 3? (ca · 96 ° C) and a temperature in the exit zone of 300 ° F (about 149 ° C) hatv ·

Rear filler cover

On the side which has not received a front coating, a backfilling coating of the following composition is applied:

(1) Beetle 7238, urea-formaldehyde resin syrup, available through American: Cyanamid I33 parts

(2) Hopco HIZ, antifoamer, available from Hopeo Chemical XXD., Hewark,

Hew jersey 5j3 parts

(3) UCAE, 151, binder, a 60% aqueous polyethylene-polyvinyl acetate dispersion, available from Union Carbide Corporation, pH 4 to 6, 133 parts

(4 x) washed clay 176 pounds

(5) aqueous solution containing 15% HH 2 Cl and 24 %. 2-amino-2-methylpropanol contains 5 »3 parts

(6) water - to bring the viscosity to 11000 cP at room temperature, as required (pigment may be added if desired to color the layer)

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The composition is applied with the knife in an amount of 10 pawn / eggs and in an oven with a temperature of the entry zone of 150 ° F (about 66 ° C) and a temperature of the exit zone of 200 ° P ( ca. 93 ° C).

Baselined fabrics can now be provided with a phenolic resin coating, an abrasive article coating, and an abrasive finish coating coating, as is conventional and well known in the art. A suitable composition which can be applied to the front side of the base is the following:

(1) Alkaline, catalysed phenoloformaldehyde resole resin, F / P-factor 2.08, pH 8.7 »Solids content 78% in water 7 (Pe

(2) Alkaline, catalyzed phenoformaldehyde resole resin, F / P factor 0.94, pH 8.1, solids content in water 78 % 3 parts

(3) CaCO ₃ 1.54 χ

Feststoffgesamtgeh.

On the adhesively coated fabric are then applied by conventional electrostatic methods 35.4 lb./g. Sandpaper (24.22 kg - 30.567 m ² ) of high purity aluminum oxide abrasive grain 60. The abrasive-coated element is then left for 25 minutes at 170 ° F (about 77 ° C), 25 minutes

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long at 190 ⁰ : ': E (approx. 88 ° C). and heated at 225 ° -1 (ca 10 ° C) for 4-7 minutes to form a dry adherent layer; form, -and ^the: abrasive grains in the ^history: tang wished Orientier: to anchor. "

Later, after the conventional. Methods a seasoning layer (10.6 pounds / ream, sandpaper, dry) with the same. Composition, but lower viscosity applied * Bann, the wet adhesive layer is dried, 25 min at 125 ° I (ca-52 ^P G), 25 min at 135 ° F ^: (.A »57 ° C), 18th min at , 180 ° V (ca 82 ° * G), 25 min, at 190 ⁰ (about 88 ° G) and 15 MIXL at 225 ° F (about 107 ° G) -, followed by a final 'curing' at 230 ° F (ca · ;. IiO ⁰ C) for a period of 8 hours followed .. the coated Sc here if material, can then according to the usual procedures in tapes, discs and. other desired sanding products are transformed ", *

In the example given above, treatment of the backing with the abrasive coating on the fill side of the fabric has been described, but in other cases it may be more convenient to coat the fabric on the warp side.

It should be noted that an essential feature of the invention is the use of Eadenanordnungen that are not interwoven with each other as in conventional fabrics, and that the use of the terms "Eette" and "filling ¹¹ or" shot "in the description of on tissue other than weaving does not include such interweaving.

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The abrasive sheet material of the above example can be formed into ribbons according to methods known in the art. Particularly suitable are the butt joints described in U.S. Patent Nos. 3,665,600 and 3,787,273. Overlapping joints as described in U.S. Patent 4,194-618 may also be used, in which cases it may be advantageous Instead of applying to the filling side, apply the front filler coating and the abrasive to the warp side of the backing, but in the case of butt joints, coat the backing on any side.

Example 2

An adhesively bonded coated abrasive backing of the present invention was prepared by crossing two sets of substantially parallel polyester spun yarns (3-5 g / denier tear resistance, 19 threads, cotton yarn fineness) between the top and bottom plates of a dry photographic press (US Pat. manufactured by Seal, Inc.), wherein the top plate is electrically heated to a temperature of 340 to 350 ° F (about 168-177 ° C). "A film of melt adhesive polyamide material (Bostik Ir. 5350" available from USM Gorp. ) was inserted between the G-layers and the press was closed to melt and set the adhesive. It was worked with a lamination time of about 45 s. The press was opened, the quilt was uncovered, the machine-directional fadeh tree advanced to place the next section of yarn over the base of the press. The thread cross was tree

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then passed through the press to cross the other tree, and the gluing process was repeated. In this way, about 8 Tard (about 7> 32 m) fabric were produced. The fabric made in this manner had a density of 93 threads / inch in the machine direction and 47 threads / inch in the transverse direction, giving a calculated basis weight of 6.81 ounces / yard ² (193.060 g '- 0.8361 m) "The fineness and density of the fabric thus produced can be easily changed by changing the fineness and weight of the yarns (yarn) used for the respective trees."

The fabric was then heat stretched to a speed of 20 feet / min (6.096 m / min) under a linear tension of. 15 lbs / customs. Width over a chain-shaped; "trained surface was led. During this doorway, the fabric was heated to 400 ° F (about 204.4 ° F) by infrared radiators on the side opposite the warp-shaped surface of the fabric. Thus, the fabric's breaking strength in the machine direction was 158 lb./in 179 ft./in. Width and elongation to rupture of the fabric decreased from 32 to 20%.

The following composition was then applied to the transverse direction side of the heat stretched fabric using a conventional 0.017 inch (0.4318 mm) rod loader:

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(1) Suracryl 820, a 45 % solid content latex, available from Charles S. Farmer Inc., Greenville, SO 133 parts

(2) Alkaline, catalysed bis-phenol-formaldehyde resin syrup, F / P factor 4.18, solids content 73% 87 parts

(3) calcium carbonate 200 parts

(4) Alfonic 1012-60, a nonionic surfactant available through

the Charles S; Tanner Co · 7/16 parts

(5) water 25 parts

It was worked with a drying time of 2 m ± n at 200 F (about 94 ° G). After drying, the side of the fabric in the machine direction with 20 lb. / Eies sandpaper one. Finishing succin setting using a conventional knife rolling laboratory coating device coated:

(1) Alkaline, catalysed bis-phenol-formaldehyde resin syrup 195 parts F / P factor 4.18, solid content 73 %

(2) Alkaline catalysed fnenol formaldehyde resin syrup, F / P ratio

0.94, solids content 78 % 20 parts

(3) CaCO ₃ 150 parts

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(4 ·) Alfonic 1012-60, a nonionic 3.6 (Healing Surface Agent, available from Charles S. Tanner Go.

(5) water 4-5 ropes

The material was then oven dried for 5 minutes at 250 ° F (~ 121 ° C).

The fabric so produced could now be provided with the coating of phenolic resins, a coating of abrasive and an abrasive finish coating, as is conventional and well known in the art.

(Assuming that the fabric thus produced can be provided with the preparation and the abrasive coating in this state, it will hereinafter be referred to as a base.) A typical composition applied to the front coated side (ie, the side on which originally, the yarns were exposed in the machine direction) of the backing can be applied, is the following:

(1) Alkaline catalysed phenol-formaldehyde resole resin, F / P factor 2.08, pH 8, 8.7, solids content in water 78% 7 parts

(2) Alkaline, catalyzed phenol-formaldehyde resole resin, F / P factor 0.94, pH 8.1, solids content in water 78 % 3 parts

(3) CaCO ₃ 1.54 σ

Feststoffgesamtgeh.4

-. -ι * - 2 3 2 2 6 8 7

To the adhesively bonded backing was then made, by conventional electrostatic techniques, 50 efd./ytes of sandpaper (330 feet - 30.65 μm ² ) of a eutectic composition of Abrasive A ^ Oo / ZrOg »Grain 50 (available from Horton Co., Worcester , Massachusetts). The coated abrasive pad was then allowed to cool at 1 ° -0 ° 3 for 25 minutes. (ca. 77 ° C), 25 min at ⁰ 3f I90 (ca. 88 ° C) and 47 min at 225 ° Έ (ca. 107 ° C) to give a dry adhesive layer and the Schieifkörner in the desired orientation to anchor.

Subsequently, a Appreturschicht having the same composition, but of lower viscosity according to the customary methods applied "I> ann, the wet adhesive layer is dried 25 min at 125 ° 1 (ca. 52 ° C), 25 min at 135 ° F (ca. 56 ° C), 18 min at 180 ° Έ (about 82 ° C), 25 min at 190 ⁰ 3? (about 88 ° C) and 35 min at 225 ° 1 (about 107 ° C), followed by eight hours of curing at 230 ° Έ (about 110 ° C). Bas Abrasive fabric could then be processed into tapes, discs and other desired Sehleiferzeugnissen by the conventional methods.

A sample of the abrasive material made in this manner was made into 2.5 inch 2:60 inch abrasive belts (63.5 x 1524 mm). Other abrasive material tapes were made by the same methods and with the same compositions as the material of the present invention, but the fabric substrate used as a backing is of conventional,

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woven polyester spun yarns were (2x1 holes; 66 sheets per inch and 44 threads per inch; yarn 3-5g / denier, warp, 12 and weft, 15% cotton) »The Eettseifee (twill) of this fabric was used as the gate side · The product of this Invention, using the adhesive-bonded underlay (product A) described above was combined with the. Comparing product made using the conventionally woven pad ('Product' B), a series of grinding operations were carried out.

attempt

Four different steel rods AISI 01018 (1/2 inch, 2.5 inch'χ 9i75 inch (12.7, 63.5 s 247.65 mm)) were alternately ground on their narrow side with a test machine, which with a 55- ^: Durometer tooth contact wheel, a Bigenlastkraft of 15 pounds (6.8 kg) and a belt speed of 5000 surface feet (1524 m) per minute worked. Thus, two tapes of each type of product were tested, with the running direction of the tapes being the same as the warp or machine direction of the mat. It was estimated that the end of the life of a tape was reached if it did not work continuously for 2.0 minutes by continuous grinding more than 5 »0 g of steel could be removed ·

Total weight of the removed steel

Product A - Band Ur. 1

Product B - Band Up · 2

Product A - Band Hr, 2

Product B - Band Ir. Second

609 S 608 S 639 σ · O 619 S

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(Best He. 2

In this test, a piece of angle iron of hot-rolled AISI 1020 steel (1/8 χ 1. χ 9.75 in. 3,175 x 2 ^, 4 χ 247,65 mm) was placed at an angle of 15 ° on one of the 1/8 in. Ground surfaces * A 90-durometer rubber contact with flat surface was used at a belt speed of 5000 surface feet per minute (1524 m / min). The force exerted on the abrasive material was about 8.5 pounds (about 3.7 kg) net weight. In this application, abrasive grains and the backing and finish layers normally fall off the backing at high speeds. · Bas End of the normal life of the product is generally reached when all the abrasive grain has detached from the backing.

Time bus min g of ent fall min distant steel 5.0 min 166 3.5 min 99 5.0 158 3.5 94-

Product A - Band Product B - Band Kr. 1 Product A - Band 3ir. 2 Product B - Band Hr. Z

For product B, where the backing used had the conventional woven construction, both tapes tested showed signs of severe damage to the pilla yarn, with the test at the second tape being terminated by splitting and breaking the tape. No such damage was observed in the product A backing as described herein.

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Example 2 above has exemplified one of the abrasive fabrics of this invention having a backing without tie yarns of any kind. It will be understood by those skilled in the art that numerous variations of this specific example may be made within the scope of this invention. If, for example, a greater economy in the product must be achieved, the transversely extending series of reinforcing yarns can be dispensed with. The tapes made from such a product would then have a lower resistance to splitting, but would be sufficient for certain applications. The binder can be selected within wide limits in order to achieve the combination of flexibility and damage resistance best suited to the intended use of the abrasive fabric.

It should also be readily apparent that more complex mechanical torque directions can be used to assemble the material described in Example 1 or 2 at a faster rate. A whole series of methods for various binders is described in UB-IS 3 250 655.

Example 3

If greater economy is desired than achieved in Example 1 and a reduced splitting strength can be tolerated, a suitable backing can be made with only one set of reinforcing yarns. For example

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Cotton yarn was wound into 18 plys on the surface of a cylinder coated with polytetrafluoroethylene at a distance giving 72 threads per inch measured parallel to the cylinder axis. Then a layer of Hycar 2679X6, an acrylic polymer latex binder, was prepared from B.I. Goodrich Chemical Company, applied in sufficient thickness to completely cover the yarn layer. The cylinder with the wet coating of binder was slowly rotated at a temperature slightly above the ambient temperature until the binder had completely dried to a continuous I ¹ IIm, which included the Bauarwollfäden. Then, along a line on the surface of the dried composite, parallel to the axis of the cylinder, a cut was made and the resulting yarn-binder-yolk polish was stripped from the cylinder. The yarn-binder composite is then used as a base for the preparation of a visual grade fabric, using the same materials and methods as in Examples 1 and 2.

Claims (9)

232268 claim for invention A flexible, coated abrasive sheet wherein abrasive grains are adhesively bonded to at least one side of the backing characterized by the fact that there is at least one array of nonwoven, coplanar and co-parallel reinforcing textile yarns, said fabric together with the yarns of all other different arrangements, if any, provide the majority of the tensile strength of said abrasive web in at least one direction in the plane of said flexible coated abrasive sheet, each of said one or more different arrays of non-interwoven, substantially coplanar and co-parallel reinforcing textile yarns, - which are present in the backing and aligned in the same direction *. A flexible, coated abrasive sheet according to item 1, characterized in that there are at least two different arrangements of said non-interwoven, substantially coplanar and co-parallel reinforcing textile yarns, wherein the. mentioned. Arrangements have at least one arrangement which is aligned in one of at least two different sightings in the plane of the base, wherein the major part of the tensile strength of the abrasive cloth along each of the at least two of said directions 232268 7 by the yarns of all arrangements of non-interwoven, substantially coplanar and co-parallel yarns oriented in said direction. 3. Flexible, coated abrasive sheet according to item 2, characterized in that at least one of said assemblies, which are aligned in at least two different Eichtungen, contains threads of large volume compared to the yarns of the other arrangements. 4. Flexible, coated abrasive sheet according to item 2, or 3> characterized in that at least one of said assemblies aligned in at least two different directions comprises textured yarns with continuous yarn or staple yarns. 5. Flexible, coated abrasive sheet according to item 1, characterized in that it contains a randomly oriented textile fabric. 6. Flexible, coated abrasive sheet according to one of the aforementioned points, characterized in that the various arrangements are joined together by means of a tool. 232268 7 7. Film according to one of the items 1 to 5 »characterized in that the assemblies are individually adhesively bonded« 8 * Flexible film, according to one of the above-mentioned points, characterized in that it contains a fabric film · 9 · Flexible, coated abrasive sheet according to one of the preceding points, characterized in that it has the form of an endless belt ·