DE2624029A1 - UNDERLAY MATERIAL - Google Patents

Description

The invention "relates to heat setting and stretching or Drafting of an underlay material made from a woven polyester halteri Flaclisngebilde, v / elches for the production of ■ coated Abrasive materials, e.g. endless belts, are suitable is. The invention also relates to a new and improved one coated abrasive material, for example in lorn an endless belt containing such a backing and a new and improved method for such Heat hardening and stretching or stretching and finally a new and improved method of making such a coated abrasive material using the same; Thermosetting and de-stretching stages.

Currently, in the usual production of coated abrasive materials, especially in the form of endless belts mainly backing materials made from woven Bauia wool sheets and, to a lesser extent, backing materials

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TELEPON (OB0) 22 28 62

TELEX 03-29380

• ft '

used from viscose rayon sheets. However, these underlay materials have only limited properties in each case in terms of strength, toughness, grip retention and basic adhesion. Yersuche, an all-thermosetting one Using resin systems have resulted in unacceptable embrittlement of the fabric substrates, in particular made of cotton, led.

The object of the invention is to overcome these disadvantages of the prior art and using a thermoset and unstretched or unstretched woven ρο lye st underlay material a coated abrasive or Schairgelia material to produce not only better properties in terms of strength, toughness, grip retention, flexibility and the basic adhesion possesses, but also without unsuitable Embrittlement with all-thermosetting. Resin systems can be used.

This object is achieved by the invention. The invention therefore relates to a base material for producing a coated abrasive material, which is characterized by that it was made from a thermoset and stretched or stretched woven fabric containing polyester or contains this. Further objects of the invention are in the Ancillary claims expressed.

Thus, the invention 1. a new and improved thermoset (and de-stretched or de-stretched) backing material made of a woven polyester-containing sheet for a coated abrasive material and preferably a sheet " woven from 100% polyester staple fibers in a satin weave, 2. a new and improved coated abrasive material containing such backing material and preferably used in

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In the form of an endless belt, 3 · a new and improved one Process for heat curing and de-stretching or de-treeing such an underlay material from a flat structure and finally 4-. a new and improved method of manufacture such a coated abrasive product using such a heat setting step is provided ►

According to the invention, such a backing material is considered in combination with such a coated abrasive material, which includes: a front fill layer on one side of the backing, a make layer on top of the front filler layer, a layer of abrasive grains that are in the manufacturing layer is embedded and a glue layer over the layer of abrasive grains and optionally a presize layer between the front filler layer and the Manufacturing layer.

Furthermore, according to the invention, there is such a backing material in combination with such a coated abrasive material contemplated including: 1. a back fill layer on the back of the backing material and a back glue layer on the back fill layer or 2. a dip filler layer on both sides of this underlay material .

Further contemplated is a thermosetting and de-stretching process in which the procedure is to maintain the backing material under both shear and chain tension while heating to such a temperature and for a period of time sufficient to allow the Backing material to an elongation of less than about 6 % at 3035 »85 kg / m (170 pounds per linear inch) while maintaining

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the desired width is dimensionally stabilized, wherein 1. the temperature and the time preferably extend in the ranges from about 20A to about 238 ⁰ G (400 to 450 ⁰ P) and from about 0.75 "to about 2 minutes and wherein 2. the temperature is preferably about 227 ° C (400 ⁰ F) and the heating time is preferably about 1 to about 1.5 minutes.

Furthermore, a method is considered according to the invention, in which one proceeds in such a way that the underlay material is continuously under chain tension through a tensioning frame oven guided through its compilations of double chain and bracket which compilations have a common drive and which automatically apply the weft tension to the base material create, maintain and release to maintain its desired width.

Such a method is also contemplated according to the invention drawn, in which the base material 1. continuously from a feed roll to the furnace by holding rollers with variable Speed is handled, which are driven at a lower speed than the compilations from chain and clamp or 2. continuously from a feed trough through the furnace through knurled rollers with variable speed which is driven at a slower speed than the assemblies of chain and clamp will.

Furthermore, according to the invention, such a method is used in combination with a method of making a coated abrasive material is contemplated in which a front Filling chute applies to one side of the base material, a Manufacturing layer applies to the front Püllschicht, a Layer of abrasive grains in the manufacturing

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embedding a layer and applying a glue layer to the layer of abrasive grains, where appropriate zvri.scb.en the front filling layer and the manufacturing layer a pre-size layer brings up.

Such combined methods are also in accordance with the invention considered, in which either 1. a back filler layer on the back of the backing material and a back size layer on top of the back fill layer or 2. a dip layer of filler on both sides of the underlay material before the front filling.

Finally, in accordance with the invention, there are such combined methods are contemplated in which the coated abrasive materials are given a finishing treatment to form an endless belt will.

The invention is explained in more detail with reference to the accompanying drawings. Show it:

Fig. 1 .... _ a perspective view of an endless coated Sanding belt according to a "preferred embodiment of the invention,

FIG. 2 shows an enlarged vertical cross section, taken along the line 2-2 of FIG. 1, which ¹ illustrates the layer construction and wherein the individual layers are drawn disproportionately large for better clarity.

Fig. J is a view similar to FIG. 2, but showing the Shows a layer cross-section of an alternative preferred embodiment of the tape according to the invention,

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Figure 4 is a schematic side elevation of a preferred one ■ Device for carrying out the erfindungsgeaäße Method of heat curing the base material according to the invention,

I ¹ Xg. 5 is a plan view of the device according to Pig. 3 »

Pig. 6 is a schematic side elevation similar to Pig. 4, which, however, is an alternatively preferred device for performing the method according to the invention the thermosetting of the base material according to the invention shows »and ·. . ".

Pig. 7 shows a plan view of the device according to FIG. 6.

In the drawings and particularly in FIG. 1, one is preferred Embodiment of the coated abrasive belt according to the invention is indicated by the reference numeral 10. It contains a compound or layer sheet 12, which is bent with the sanding side outwards, with the opposite End portions 14 and 16 arranged in edge-abutting relationship are. From the Pig. 1 it can be seen that these end portions 14 and 16 are slit open at an angle to the direction of travel of the tape are as indicated by the arrows. The desired. Flat flange connection is made by a joint splice indicated by 18 given. This splice can be any con structure, such as that disclosed in U.S. Patents 3,665,660 and 5,763,604.

Alternatively, the tape can also be formed with a fold splice by splitting the end parts, a suitable adhesive interposed and then the connection, heat-pressed in a known manner.

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-A7 -

262A029

In the JPig. Figure 2 is the multi-layer or laminate construction in cross-section of the band of FIG. 1 shown more clearly. For better illustration is the thickness of each layer not drawn in real proportion, but. enlarged fairly to show the presence and nature of each layer and its relationship to the adjacent layers.

The sheet or plate 12 of the belt 10 contains a backing material 20 made of a woven fabric, preferably a 100 % polyester fabric, which is woven from polyester staple fibers in a satin weave. A rear filler layer 22 is provided on the rear or lower side of the base material 20 and a rear glue layer 24 is provided on this layer. The manner in which these layers are applied will be explained further below, but it should be pointed out at this point that the rear filling chute 22 actually impregnates the base material.

On the upper side or the front side of the base material 20, a front filling chute 26 is provided, which is also impregnates the fabric. A presize layer 28 is arranged on top of this layer, at the top of which the manufacturing layer 30 is located. In the manufacturing shift a layer of abrasive grains 32 is embedded. This layer is in turn covered by a glue layer 34 ·.

A preferred alternative embodiment of the invention The tape is shown in Fig. 3, which is similar to Fig. 2. the individual layers are the same. The same reference numbers are used followed by the lowercase letter "a". at the embodiment of FIG. 3, however, are the rear Filling layer 22 and the rear glue layer 24 - of Fig.

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-fine replacing the backing material sheet 20a is immersed in a suitable fluid composition to form a dip filler sleeve or layer 2Ja which the back and front sides of the pad simply 20a completely surrounds and impregnated. As shown in Figure 3, inherently the backing material 20 is of the desired bandwidth has been cut so that the sleeve has been removed from the side edges.

In each embodiment, according to FIGS. 2 and 3, however, is a critical design feature of the thermoset and de-stretched or the stretched state of the base material before application, the other layers and before being trimmed to the bandwidth.

With reference to FIGS. 1 to 3, the production process is intended below are explained in more detail. This comprises the following six basic levels. It should be noted that the Figures 1 to 3 show the finished product cut to width, while prior to the formation of the band the various Layers considerably wide? are equal to the width of the woven sheet material.

The first stage involves weaving the wide sheet-like backing material from which the narrow backing material 20 or 20a is formed. In the second stage heat cure and Entstreckung or Entreckung carried this sheet-lower sheet material, as hereinafter more particularly in connection with Figs. 4 to? is explained in more detail. In the third stage, the final cloth treatment takes place, which includes the application of the rear filling chute 22, the rear glue layer 24 and the front filling layer 26 according to FIG. Figure 2 provides "The same applies to the embodiment of Figure 3, except that the back filler layer 22 and backsize layer 24 are replaced by the dip layer or sleeve 23a.

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1 1 t

In the case of an alternative procedure, such as that used for non-waterproof high-performance tapes such as those according to Pig. 2 and 3 "is preferred, a pre-power layer is required 28 (Pig. 2) or 28a (Pig. 5) include the To improve the adhesion properties of the finished product.

The fourth basic stage of making the tape is in general referred to as the coating ". They includes the steps of applying the make coat, the grain coat, and the size coat bsw. of the glue coat, as in the Pig. 2 and 3 is shown.

In the fifth basic stage in the manufacture of the tape, hardening takes place, which is explained in more detail below -target. It involves a heat treatment of the coated roll of the backing material from which the tape is made.

The product is completed in the sixth and final stage. This stage includes bending and splitting the roll-hardened Ribbon matrix for the various desired belt widths, bevel cutting and an arrangement of the adjacent ones End parts 14 and 16 according to Pig. 1 and the application of the splice, e.g. 18, to close each individual band to complete. .

4 and 5, a suitable thermosetting apparatus is shown schematically which was used in Examples 1 ″ and 2 for the thermosetting of the base material.

The gate direction contains a feed or unwind roller 4-0, on which the role of the planar structure 200, which is used for

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Position of the narrower pad material 20 (Fig. 2) or 20a (Fig. 3) is used. When the wide base material 200 is continued from left to right, it runs from the feed roller 40 over the carrier rollers 41, where it is removed via a guide roller 42 and it then passes through the holding rollers 43 and 44 which form "holding station 1" . From here, the substrate 20 is guided between the holding rollers 45 and 46, which form the "holding station 2" and "the substrate then runs between the holding rollers 47 and 48, which form the" holding station 3 "below the guide roller 49, over the Guide roller 50, below the guide rollers 51 and 52 down and over the guide roller 53 to the holding rollers 54 and 55, which form the "holding station 4i" ^ri . These holding rollers 54 and 55 are at a variable speed> which is greater than the speed at of the holding station 3 in order to apply a chain tension. However, their speed is less than the pulling speed of the assemblies of chain and clamp, which are described below (and which are also known as tenter frames), so that further chain tension is applied to the sheet-like structure. while it is being heated.

The material then passes through the combined heat treatment and de-stretching apparatus indicated by reference numeral 56. These. Apparatus is known as a clamp tenter and it includes an oven 57 * ' . It is provided with a number of stations or control points 53 for adjusting the width of the tenter. By means of a support structure 59 and 60 which is cantilevered at each end, this device contains the mechanisms or assemblies 61 of double chain and bracket. These assemblies have a common drive (not shown) for feeding the material 200 into and through the furnace 57,

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while maintaining its desired width. For this contains every such. Compilation or any mechanism 61 at the entrance end of the furnace a gear 62 and at the exit end of the furnace another gear 63 '· These two gears are connected by a "connecting chain 64- on which a number of clamp mechanisms 65 are attached. The exact The structure of this compilation is shown in U.S. Patents 3,180,001 and 3,234-622, which are expressly incorporated herein by reference is taken.

The clamping mechanisms 65 are on the outer portion of the The chain 64 is uncoupled and they couple with the sheet-like structure 200 on the inner portions of the warp to achieve the desired width of the material as it is thermoset and de-stretched. Maintain detachment. In order to facilitate the decoupling of the clamps from the sheet-like structure, the double assemblies are used provided with guides 66 at the exit end of the furnace. These guides are designed so that they Actuate the clamps so that they disengage from the sheet to allow the sheet to pass evenly between the holding rollers 67 and 66 to facilitate when the The sheet-like structure leaves the furnace 57. These holding rollers form the stop 5 "UJO-d they are variable speed (approximately with the same as the compilations 61) driven to the correct unclamping of the planar structure during its passage or the chain direction during its passage through the hardening and de-stretching or stretching device to ensure v / eil the drive of the take-up roller is insufficient for this purpose. Finally will the thermoset and stretched or stretched Jlächengöbilde wound on the pick-up roller 69 for further processing.

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In addition to that in the Pig. 4 and 5 shown heat ' curing device is that shown in Figs "Device has been used with success to create the planar structure." when carrying out the process according to the invention, in particular according to Examples 3 ″ to 5, listened to heat.

Only the differences between the two types of device are described, with the same reference numerals in ', FIGS. 6 and 7 as in Figs. 4 and 5 to denote similar ones share uses v / earth, but with the addition of the small letter "a".

In the device according to FIGS. 6 and 7, instead of the feed roller, the sheet material 200 can be removed from a trough 70 or the like and heat-cured, whereupon it runs over a guide roller 7 ^ ^and under a further guide roller 72 before it passes through the three high vertical stands of Quetschwaisen 72, 73 and 74 is running, the holding stations 1- ^ 3 of FIG. 4 replace-Thereupon passes the sheet to the knurling 75 and. 76 around which have a variable drive speed before the sheet in the Oven 57a of the thermosetting device 56a and in coupling with the assemblies 61a of double chain and clamp. The only differences between the latter parts and the correspondingly labeled parts of FIGS of the guides 66a, which have not been found necessary for this particular device, otherwise the structure and de r Operation of the furnace and the assemblies of chain and clamp as described above.

After the heat hardening and stretching or stretching, the sheet-like structure is passed over tfalzen 76, 77, 78 and 79 which are in synchronism and are spaced apart and which form the holding rollers

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67 and 6ό in the hold ~ 5 position of the pig. 4 replace. Then the fabric runs over the guide rollers 80 and 81 the take-up roller 69a.

The examples explain the invention.

Example 1 . ·

A 100 % polyester satin weave fabric was woven on a standard loom using a high tenacity polyester fiber called the Eastman Code 421. This fiber is "believed to be thermoplastic and has properties of high toughness, superior strength, high modulus, and relatively low elongation. The fiber has the following properties: tenacity 6 g / den _t elongation 24 %; tenacity at 10 % elongation 4.5 g / den; initial modulus 55 g / den; average toughness 0.90 g / den, specific gravity 1.38, moisture recovery 0.4% at a relative humidity of 65 % and 21.1 ⁰ C (70 ° F), cross section, round, Garnschrumpfuag in hot water at boiling point for 2 minutes, .2% and in a hot oven at 190 ⁰ C (374 ⁰ F) 10 minute measured 11 ° / o. The tensile properties were incubated with individual filaments using an Instron Tensaltester , which was operated at 21 ° C (70 ⁰ S ¹ ) and a relative humidity of 65%.

These values are from the company publication no. TDS E-103a-III, 5- Auf-, location (1972) from Eastman Chemical Products, Inc., Kingsport, Taken from Tennessee. This company publication is expressly referred to herein Referenced.

The fabric was a 5 harness 4/1 satin weave construction, Made using a high tenacity, 2 denier technical polyester staple fiber. The flat structure was with 96 warp yarns 13/1 and 42 fill yarns 23/1 with a nominal weight of 2.86 m / kg (1.42 yards per pound) and

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woven a width of 152.4 cm (60 inches). This woven Substrate was then in the device according to Pig, 4 and 5 thermoset and de-stretched "or de-stretched to the required Machine direction dimensional stability of less than 6.5% elongation at 3035.86 kg / year (170 pounds per linear inch) width. The standard dissolving strip test method was used.

The procedure for this test method is to use a thermoset Sample with a width of 31.75 mm. (1 1 / 4- inch) cut to a chain length of 25.40 cm (10 inch), peeling out the outer warp yarns to reveal a width of 2.54 cm (1 inch). The sample is in a Instron ^ nsile tester inserted, with the jaws in one 5 inch spacing with 7.62 cm front brackets (3 inch) and 5.08 cm (2 inch) are set. The clamps and card are accelerated at speeds of 5.08 cm / min (2 inches per minute) or 1.27 cm / min (0.5 inch per minute) set to set the elongation at 3035.86 kg / m (170 pli).

Thermosetting was achieved using the standard drying tenter apparatus of FIG. It had a heating capacity of 260 ⁰ C (500 ⁰ I ¹ ). This device is manufactured by Marshall & Williams Corporation, Providence, Rhode Island. The entrance to the furnace is designed so that the sheet is held in the holding station 4 (Fig. 4), whereby a longitudinal tension is effected, in so far as the tensioning frame (assemblies 61 of chain and clamp) have been adjusted so that they are faster than the variable speed driven holding rollers 54 and 55-

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• as *

Using "the apparatus of FIGS. 4 and 5, a 152.40 cm (60 inch)" wide roll of the sheet was placed on the unwind roll 40 and then passed through the machine but not into the oven 57. Then the oven at 22? ° C (440 ⁰ P) is heated and the clamping frame (to form the compilations

61 as a double chain and Klaipier) was extended to a width of 142.24 cm (56 inches) set. The entrance of the clamping frame is designed so that it corresponds to the width of the entering cloth surface formation is self-adjusting.

The sheet 200 was then run the entire length of the machine. 56 and the rollers 67 and 68 were at the holding station 5. closed. Once the sheet has passed this station, it is wound onto the take-up roll 69. Then, the surface speed of the rolls was feet of 6.40 m / min (21 ^a uf a öberflächengeschwindigkeit of 4.88 m / min (16 feet per minute) set 54 and 55, while the outlet speed of the rollers 67 and 68 to a speed Oberflächenge per minute). (The speed of the sprockets

62 and 63 were measured to be 6.55 m / min (21.5 feet per minute). Eventually the holding rollers 45, 46 and 47 became and 48 in holding stations 2 and 3 closed.

Fifteen rolls (approximately 182.8 m) (200 yards per roll) of the sheet 200 were successfully heat cured and de-stretched to less than 6% elongation at 3035.86 kg / m (170 pli) (release streak test) . In addition, markings to determine the width and longitudinal seams were sewn into the fabric with the following results. The mean decrease in width from the woven state by the heat setting and stabilization was 5 % · <

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The mean increase in length was 4.3 %. \

In order to compare the relevant physical properties with a standard cotton tape pad construction, the following control sample was treated in the same manner as described above. This control construction was a comparative roll of cotton twill woven with 76 ends and 48th shoots. The chain was 12-1 / 2 ^S and the filling 17 ^S. This construction was subjected to a standard wash and stain process and dried in the normal manner, producing a 4.8 % decrease in width.

The relevant physical properties of each type of sheet are given below.

Table I.

Tensile strength- elongation, chain "elongation, chain keit, chain, at 3035 w _m at 1785 kg / m, ks / ia fo ' ^a %

Polyester HS 6176.1 5.9 2.3

Standard wash

and drying 2409.8-6.9

Footnote: The elongations with 3034.5 kg / m were not compared, because the cotton tore at less than 3034 kg / m. From the The above table, however, is readily apparent that both the strength and the elongation properties of the invention Thermoset polyester sheet considerably were better than those of the control cotton sheet,

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The polyester sheet-like structure 200 was subsequently fabricated, just like the control cotton fabric. For this There is a back filling and a back glueing of AC 604 / CaCO ^ and a front! filling of phenolic CaCO, of the following formulations are used.

Formulation: the back filling and the back gluing

Dimensional weight, dry weight, dry basis kg kg %

AC 604 215.7 99.2 48.86 CaCO, 99.0 99.0 48.74 EH ₄ SCOT 2.0 · 2.0 1.01 Tamol 731 (25 %) 1.1 0.29 1.14 CMC (8 % ') 31.8 2.5 1.25 V / ater 30.2 - -

Total 379.8 203.0 100.00

Footnote: The viscosity of the formulation “at 23.9 ° C. was 5,500 cps + 500 cps. The solids content was 53 %.

Bhoplex AC 604 is a thermosetting acrylic polymer emulsion from Rohm & Haas Company, Philadelphia. It has a Brookfield viscosity at 95 ° C. of 20 to 100 cps, a solids content of 46 % and a pH value of 9.5 to 10.5. The ammonium thiocyanate crystals were used to catalyze the AC 604. It was a product of McKesson Chemical Company, Buffalo, New York. The Lamol 731 (solids content 25 %) is. a dispersant also available from Ehom & Haas Company. The calcium carbonate (ground limestone) has. a CO ^ content of 43.88 + 0.43%. Specific gravity of about 2.74, an average particle size of 17 to 25 W, measured at the 50% point of a sedimentation curve, a white color, such a particle size range that at most 35

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1 left

· Ι ir

Weight percent remain on a sieve with an opening of 53 V- and it is made of organic impurities and inorganic trace elements such as SiC ^ » IeJ ^ ₇ . , Al ^ O ^ and clays free. The product is available from the National Gypsum Company, Philadelphia, Pennsylvania.

The sodium carboxymethyl cellulose (CMC) was an anionic water-soluble thickener with a pH of 7 »O in a solution of 2 % _y a solids content of 95 ± 1 %. and a viscosity of 2> to 30 cps, using the ITr spindle. 1 in a Brookfield LVF viscometer at a speed of 60 rpm.

The * ratio between the rear filling and the rear gluing of AC 604- / CaCCv is 1: 1 based on the dry base. The system is catalyzed by ammonium thiocyanate in a ratio of 1: 4-8 based on the dry AC 604-. The wetting agent (Tamol 73 ^) egg thickener (8 % carboxymethyl cellulose), the brown pigment and water are added to a viscosity of 5.5ΟΟ cps + 500 cps at a temperature of 23.9 ° C (75 ⁰ I *) . The total solids content of the solution on a dry basis is 53 % -

The viscosity varies in a known manner according to the one used How the coating is applied. The squeegee-on-fabric system requires a viscosity of 5.5ΟΟ cps in order to obtain a satisfactory final structure. If the application with a flexible squeegee-on - the roller takes place (or if a inverted squeegee is used) then the viscosity can drop as low as 1300 cps and it will still be satisfactory Final properties obtained.

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The rear fill separation is 1.59 + 0.23 kg / ream (one ream corresponds to 480 9 x 11 sheets). The sizing composition, which is the same as the backfill, was deposited dry in an amount of 1.13 + 0.23 kg / ream. As stated above, the viscosity varies depending on the type of application, i.e. whether with the doctor blade or the role is being worked on.

The front filler composition was a ratio from 1: 1 -from a phenol-formaldehyde resol and calcium carbonate on a dry basis. The viscosity was 300 cps + 150 cps at 32.2 ° C, the solids content on a dry basis being 75% « This composition had the following formulation.

Front filling formulation;

Eaß weight, dry weight, - %

kg

P-F1 resin x 227 156.6 50.70

, 13 kg 227 ,8th 156.6 151 151 1 1.13 30th -

CaCO ₅ - 151 151 48.93

Span 20 1.13 1.13. 0.37 Furfural

Total: 410.1 308.9 100.00

Footnote: The total solids content was 75.3% on a dry basis * The viscosity at 32.2 ⁰ C was I3OO cps + I50 cps.

In the P-F1 resin, the formaldehyde / phenol ratio was 0.99. The product contained ethylene diamine as a catalyst, which accounted for 0.6% of the total charge. This catalyst was modified with furfural and shellac which accounted for 4.6% and 2.0 % of the total batch, respectively. The physical properties of the

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Resin were as follows: pH = 7 »? + 0 »2, specific weight = 1.120 +0.025, solids content = 69 + 5 %, viscosity = 1400 cps + 200 cps and a gelation time at 121 ° C. = 20 + 2 minutes.

The CaCO ^ was the same product as stated above. Chip 20 is a sorbitol monolaurate that is used as a wetting agent. It is made by McKesson Chemical Company, Buffalo, Few York, expelled.

The furfural (furfurylaldehyde) is a solvent thinner with a specific gravity of 1.155 + 0.005 at 20/20 ° C. This material can be obtained from the Quaker Oats Company, Cleveland, Ohio.

The viscosity and the solids content can be adjusted in a known manner vary depending on the method of deposition, taking when applying a considerably lower viscosity is required with the roller or pod than when applying with the knife. at coarse lubricating gel particles, roller coating provides a satisfactory one Separation, while fine lube products may require the sakel to work. The for The deposit used to obtain a satisfactory product was 1.63 + 0.91 kg / Bies of the front of the front panel.

As has already been stated above, the inventive thermoset woven polyester sheets and the cotton control sheet finished in the manner indicated. Attempts were also made to use a non-heat-cured one and unstretched or unstretched polyester sheet-like structure ready to be processed, but this was due to raucous phenomena (Hose formations) originally possible, i.e. the hall

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tape edges of the fabric rolled up in the direction of the center of the fabric on- Further related Efforts were therefore discontinued.

Purely non-waterproof "coated abrasive products, according to Made in this example, the polyester and cotton constructions were as follows:

Underlay material (like woven)

polyester

cotton

χ 42 satin weave

76 χ 48 drill bits (in the abrasives industry common)

Weight of the pad

heat hardened and stretched or stretched

rear panel AC

rear gluing AC 604 / CaCO _x

7.7 + 0.5 kg / Rxes

1.6 + 2.3 kg / ream

1.1 + 0.2 kg / Rxes

7.1 + 0.3 kg / ream

only pulled down 0.95 kg / ream

0 _s 95 kg / ream

front filling PF Resol / CaCO _z

3.2 + 0.2 kg / Rxes

3.26 kg / ream

Footnote: Although everything was the same, it was found that it was impossible to have the same amount of back fill and the back gluing on the cotton substrate as on the

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Polyester, although the front filling denotes the Specifications sufficed.

Below is a "comparison of the properties of the two thermoset and filled fabrics:

Table II

Chain tension, kg / m

Polyester (thermoset and de-stretched or depredited )

Cotton (only pulled down)

84-29.0

4-535.9

% Elongation at 5056 kg / m

4.8

2.4

Eeißwert nach. Elinendorf: across the chain

the chain did not break (propagation along the filling

695

Bite Adhesion, Instron, kg / n

317.9

embrittled

Footnote: With the cotton there were several embrittlement phenomena no further investigations carried out.

When preparing the door for the basic adhesion test, the special manufacturing mixture described below was applied to the front

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a sample measuring 20.32 cm (8 inches) by 26.67 cm OO, 5 inch) of each fabric ax roller bars applied. This measure was repeated and a layer structure was produced from the two samples. The shift is held was made by a laboratory trimmer to achieve a uniform contact ". Bach drying for 3 hours at 93 ° G with a disk weight on top the samples were stacked on three, from the four sides, with one side left free to begin peeling ai « The samples were then cured for about 16 hours at a temperature of about 107 ° C.

The cured samples were made into strips 2.45 cm wide and long using a cutting insert cut from 26.67 cm. There was also a 2.5 cm placement control used on the Instron Tersüe-Üester. Then were peeled the samples by hand until the peeled strips extended beyond the opposite end of each sample. A 2.54 cm strip was placed on a steel rod and with the rod in the top clamp of the Instron device clung to. The remaining peeled strip was placed in the lower jaw of the Instron device, causing a 180 degree peel. The jaws were fastened closed and the Instron device became moved at a speed of 12.7 mm / min. The speed was recorded on a map. There were those too Values of the 1.27 cm / min / cross head speed and the kg value recorded.

It can be seen from the above table that it is excellent in tensile strength, acceptable elongation and excellent There is tear strength across the chain. It can also be seen that the polyester does not during the adhesion test

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embrittled, which is a considerable superiority of the invention Polyester sheet over the standard cotton control substrate.

Pre-glue;

In continuation of the fiction according to the method can a Pre-sizing can be applied to increase adhesion.

This alternative step takes place before the deposition of the manufacturing layer. In the manufacture of the tapes shown in FIGS. 2 and 3, a pre-size was used, which as 28 or 28a is indicated.

The undiluted presize mixture is a water-soluble phenolic resin with a formaldehyde phenolic ratio of 1.01 and a 50 % sodium hydroxide catalyst, which makes up 0.6% of the total charge. The mixture has the following properties: pH = 7.85 + 0.15, specific weight = 1.195 + 0.015, solids content = 70 % + 5 %, viscosity = 500 cps + 150 cps, gelation at 121 ^° C. in 28 + 3 minutes.

The Vorleimschxcht was by means of a Zvreiwalzentrimmeinrichtung Applied to a deposition weight of 1.81 kg / ßies on a wet basis. The pre-gluing then becomes tack-free State, brought.

Manufacturing layer

The manufacturing layer was made from the same resin system as the pre-sizing solution, but with the incorporation of OaCO and Span 20 made for wetting. The mixture has the following formulation:

709831/023 0

J Cancellation Dry % Wet . 385
550
3 41.04-
58.64-
0.32 Gate glue resin
CaCO _x
Chip 20 550
550
3 933 100.00 Total:
* 1.103

Footnote: Total Solids = 85.04 percent by weight, dry "basis.

This production system was turned into an intersection by Tais from 9 to 53 kg / egg whale loaded on a hate basis. One such manufacturing layer is shown in Figs. 2 and 3 as 30 and 30a shown.

Eorn deposition; '·' ■

At this point the ribbon matrix was turned over so that the manufacturing layer was facing down. Then alumina grain with the grain size 36 upwards was electrostatically whirled up and embedded in the liquid hasse. After that, the one with the. The grain-coated object is dried to a tack-free state, so that the embedded grains do not lose their orientation.

Glue layer - "." .. "'

After the hardening of the manufacturing layer, the object was then coated with a size or sand size layer with the following composition:

709831/0230

1 - ac- Dry ■ ■ »»
2624029 ■ Vo ' 385.00 Glue layer 550.00 Wet 3.75 550 2.00 Linseed resin 550 - 40.45 Cryolite 3.75 11.00 57.79 Chip 20 8th 951.75 0.39 Tamol 731 (25%) 2.00 0.21 Halco 123 * '11.00 - Attagel 50 1,124.75 1, 16 Total: 100.00

approximate value, assuming no solids contained therein xvaren.

The glue resin is described above. The synthetic cryolite had the following formulation:

Components Weight percent, dry basis

Cryolite

Al

Al ₂ O ₃

Fe ₂ O ₃ free moisture

91.0-94.0

48.0-52.0 13.0-15.0

2.0-6.0

0.14-0.30

0.04-0.09

0.01-0.10

0.05-0.12

Sieve analysis

0.148 mm. 0.1 % maximum

through a sieve with a
clear mesh size of
0.149 a, withheld on
a sieve with a clear one
Mesh size of 0.074 mm 1.0 % maximum

709831/0230

-YT

through, a sieve with a mesh size of 0.074- ma, withheld on a sieve with a mesh size of 0.044 mm

5.0 % maximum

through a sieve with a mesh size of 0.044 am,

95 % maximum

Footnote: The maximum pH value is 8.5 · This material can from the Great Lakes Foundry Sand Company, Detroit, Michigan "."

The descriptions for Tamol have been given.

731 and Span 20 are at the top

ITalco 123 is an anti-foam agent for both defoaming and also to prevent a build-up of foam in the resin filler mixes. It is a genic of synthetic organic chemicals and it can be made by Ualco Chemical Company, Chesterland, Ohio. Attagel 50 is a thickener for resin systems. It is a specially treated form of the mineral attapulgite, namely a needle-shaped one Magnesium aluminum silicate. It can be supplied by Meyers Chemicals, Inc, Buffalo, New York.

This glue or sand glue layer vrorde by means of a Roller system up to a separation weight of 13 »17 kg / ream applied on a wet basis. The product was then roll cured.

709831/0230

- 28 -

Product completion

At this point of the method according to the invention, the coated strip-shaped matrix is subjected to a final treatment, the matrix being given the desired width and length in the desired number . Ribbons cut open. This is followed by a split around a band with the general appearance, the Pig. 1 to manufacture. During this finishing process, it is usually necessary to flex the ribbon matrix prior to cutting and splitting operations, including for ease of handling. -.

Standard comparison or control products

To evaluate the properties of the tapes produced according to the invention, tests were carried out against two standard tapes. the one with a backing material made of cotton. These had the following composition:

Control cotton 1

The search construction of the control cotton Ur. 1 was a Baumvrolldrillich with 76 ends χ 4-8 shooters lofts, a chain of 12 1/2 ^S with a filling of 1? ^S. The width decreased before backfilling, after drying the standard washing process and the coloring process, among other things 4.8 ^.

The cloth was then cleaned using a two-roll trimmer backfilled with a solution having the following composition.

709 831/0230

Wet weight, kg dry weight % kg kg

Glue starch v ^t ater ■ water vapor

136.2 136.2 50 136.2 136.2 50 378.1 - ■. - 41.8 - -

Total: 692.4 272.4 100

Note: The viscosity was 10,000 cps + 1000 cps at 65.6 ° σ. The separation was 1.8 + 0.23 kg / ream.

The glue properties were as follows: viscosity 58 mP + 3 mP; Gel ', 1.35 g + 5 g, moisture 12% ± 1.5 #, pH 6.5 + 1.0, ASA value: 5 % maximum; Fat, 2.5 % maximum, foam 20 seconds; Classification: -at least 50 % must be coarser than 0.84 mm. with no more than 2 % passing through a sieve with a mesh size of 0.149 mm and no more ί-ls 1 % remaining on a sieve with a mesh size of 3 »36 mm. The product is sold by the Peter Cooper Glue Company, Gowanda, Hew York.

The starch is a low-boiling starch with a flowability of 50. It can be purchased from the Hubbinger Company, Keouku, Iowa, under the trademark Reofilm 50.

The front filling and the back glue were made by means of a two-roll trimming device with a 25% glue solution applied with a viscosity of 40 + 50 cps at 65.6 C. The solution has the following composition:

709831/0230

> Bt

- 5 © -

Hate

Glue 400

Water 1,215

Total 1,616

! Footnote: Seed solids content 23%.

The front plaque deposition was 0.59 ± 0.23 ig / egg. The rear glue deposition was 0.454 · + 0.23 kg / Hies «The same glue is used as in the EücfcCülliang.

The pad was marked with the P-3? Sesol resin pre-gelled, with a separation of 1.82 kg / ream (wet) took place.

The mixture was then prepared using a two-roll centrifugal device up to a hate separation of 12.7 ig / Hies applied.

The composition of the manufacturing mixture was as follows:

wet dry %

P-F2 March 275.0 176 i8.57 P-F3 2arz 275.0. 213 22.48 CaCO ₃ 550.0 550 53.04- Potassium tripolyphosphate 5.5 5.5 P, 58 Chip 20 3.0 3.0 0.32 Total: 1,108.5 W, 5 100.00

Footnote: seed solids content = 85.5

709831/0230

The Ρ-ϊ'2-Hara had a formaldehyde phenol ratio of 1.76 ", and it contained a Bariumoctahydratkatalysator ,. of 2.24 ° / o of the total charge constituted The properties were:. PH = 7.9 + 0.2, specific gravity = 1.21 + 0.02, solids content = 64.0 + 2, viscosity = 130 cps - 35, water tolerance = 100 Hinimum, GS Gel "at 121 ° C = 12 + 1.5 minutes.

The P-]? 3 resin had a poly: maldehyde phenol ratio of 1.82 with barium octahydrate catalyst making up 2.24 percent of the total charge. The properties were: pH = 8.0 + 0.1, specific gravity = 1.275 + 0.015, pesticide content = 77.5 + 2.5%, viscosity = 3-500 cps + 1000 cps, water tolerance = 75% Hinimum, GE gel at 121 ^° C. = 9 minutes + 2 minutes.

The potassium triphosphate (as a dispersant) was a clear and colorless solution. It can purchased from Chemical Sales, Buffalo, Hew York, χτ ground.

The alumina granules were deposited in the same way as above in connection with the manufacturing layer described.

The grains embedded in this way were then size-coated, for which a two-roll trimming device was used. It was a glue layer with the following composition is applied:

_ wet dry % P-P2 resin CaCO

550 352 34-, 78 .650 650 64.23 10 10 0.99 traces - -

Tamol 371

Total: '1,210 1,012 100.00

709831/0230

Puss note: total solids content = 84 %.

With regard to · hardening and! Completion of the product ■ The same procedures have been followed as above.

Control cotton 2

The cloth substrate for this cotton control product was the same as for the control cotton Λ including cloth finishing, except for the pre-sizing. This had the following composition:

Composition of Yorleimung

Barrel base

Pre-sizing hara 60 %

Camel carb (CaCO ₅ ) 4-0 %

This Torleiia mixture was applied by a two roll coater to a deposit weight of 2.33 kg / ream on a hate basis - the presize resin is the same as described above. The camel carb is fine-grained CaCO-. The COp content is more than 40 % and the CaCO ^ content is more than 92 %. The color is white. 99.5 percent by weight must pass through a 0.044mm mesh screen. 70 percent must be finer than 15µ. The supplier is CA. Campbell and Co., Inc., Cleveland, Ohio.

The preparation mix is the same as for the one according to the invention Product as described above. It was rolled up to a separation weight of 9? 53 kg / egg upset on hatred.

709831/0230

£ 024029

The approval has the following composition:

wet dry

550.0

üöcyolit 550.0 550 58

Tamol 731 5.5 5.5 0.58

Salco tracks - -

Total: T.105.5 9 * Κ> ~, 5 100.00

Footnote: The total solids content was 85 %. The xryolite, iamol 731 and Haleo were rubbed above. The P-resin would have a formaldehyde phenol ratio of 2.03 and it contained 50 % liatric hydroxide catalyst corresponding to 1.5 % of the total charge. The physical properties were as follows: viscosity 350 + 100 cps at 25 ° C, pesticide content 70 + 3 % ₉ GS emptied at 121 ° C 11 + 2 minutes, water tolerance 500% minimum, pH 8 + 0.2, specific gravity 1.195 + 0.15 · This glue layer was coated with rollers up to a separating weight of 8.6 kg / egg on the basis of water.

Yer ^ body tests

The tape product according to the invention with a polyester backing was then together with two standard products that include a cotton documents included, tested. The band size for both the tape according to the invention as well as for the standard tapes the dimensions of a width of 5 »08 cm and a length of 296 cm. The following values were obtained.

709831 / Q23Q

• t I

- 3ft -

according to the invention 8.5 tape Bauia wool control 5 ·. product 1 Cotton control 3 product 2

Cutting data for 1018 cold rolled steel

Edge test number of cut test, Eontakte g / removed

955 882 884-

i These tests showed the basic adhesion properties (edge!

test) as well as the mass removal skills (cut test). The tapes according to the invention with a polyester backing showed a 2.8 better basic adhesion than the cotton control product 2 and a 1.7 x better basic adhesion than the control cotton product 1. This is presumably the result of the cloth manufacturing process in which thermosetting materials have been incorporated into the substrate to retain a large part of the original handle without embrittlement. Expressed as a percentage, the above * results show that the inventive tapes are 70 % better than cotton control product 1 and 167% better than cotton control product 2. The metal wet removal ability is also better, the inventive tapes performing 8% better than both Control products.

A unique ability of these high-performance, non-waterproof products of total resin that have been produced according to the invention is that the strength and the Toughness of the lining, with the grain side pressed together will withstand without a fragmentation. You can not

709 831/0230

¹ »» ■> ■! 1 II> ι)

¹ ' ' Il

• I ■ I> I ι

¹ '' III

can easily be wound manually over the warp if it has been made during the doubling process
are. On the other hand, coated abrasive belts are resistant
with simple cotton as the standard substrate, both
have been finished with natural as well as thermosetting high polymers, and have been processed into an all-resin product, as is the case with the two control products of the]? all, this type of treatment does not, but they split up first.

The tapes of the present invention continued to have success
compared to competing products during operation. The search reports indicate a success ratio of at least 75 % that ranges from 25 to 100 % better in terms of metal removal properties.

In some cases in the. In operation, it was found that the polyester-based belts of the present invention with aluminum oxide grains outperformed competing products which had a high performance grain in the coated abrasive belts
of zirconia-alumina.

Additions to Example 1 and others

The above in connection with the back filling and
resin Rhoplex AC 604 described in the reverse sizing mixture is in the technical bulletin of Rohm & Haas, C-34-0,
February 1972, described. This bulletin is expressly referred to herein.

In this and the other examples the grain was deposited at about 28.1 kg / ream in Examples 1, 2 and 4- and with about 25.9 kg / sies in example 2, and finally with

709831/0230

- 56 -

etifa 10.9 kg / here in example 5-

Still had in Examples 3 to 5? where the apparatus of Figures 6 and 7 were used - the knurling rollers had a surface speed of about 25.6 n / min. The tension frame- new »ie. the combinations of chain and clamps had a surface speed of about 26.5 m / min. and the underlay material was heated to about 227 ° C for about -1 minute, since the oven was about 27.4 m long- In Examples 1 and 2, where the gate direction is the 3 ig. 4 and 5, the backing material was also heated to about 227 ° C for about 1 minute since the oven was only about 7-6 ^meters long.

The "flat" structure made of 100 % polyester and with a satin weave, which had been heat-cured and desstretched according to Example 1, as well as cloth dyed, was processed into a water-resistant product for use as a "coated abrasive, where such a product was converted into a predominantly aqueous solution is immersed in order to carry out the grinding operation. While the various coating and product finishing stages were the same as in Example 1, it was necessary to change the manufacturing system so that the phenol-formaldehyde resin used to hold the mandrel was not deteriorated in properties when it was is used in an aqueous system. The preparation mix of this example had the following composition:

Composition of the manufacturing layer

wet dry %. A1 6154 resin 550 451 44.83 CaCX),. 550 550 54.67 Chip 20 3 3 0.30 Silane Z-6026 2.75 2 (approx.) Q, 20 Gesaiat i 1,105.75 1.006 100.00

709831/0230

Footnote: The pesticide content was 91 %. The make mix was deposited by means of a roll coater at 8.6 kg / egg on an egg basis. The viscosity was 2000 cps. To adjust the viscosity, 2 parts of ethylene glycol monoethyl ether were used per 3 parts of water.

The physical properties of the A1 6164 phenol-formaldehyde resin were as follows: '' I solid content 82 + 3%, viscosity "5000 + 1000 cps, GE gel value at 121 ° C 6 + 1 minute and pH at 95 ° C 6.7 + 0 The resin can be obtained from Borden Chemical Company, Bainbridge, Few York. Silane Z-6026 (adhesion promoter) can be obtained from Dovj • Corning Corporation, Cleveland, Ohio.

The ethylene glycol monoethyl ether had a specific weight from 0.928 + 0.505- It can be obtained from the Commercial Chemical Inc. Buffalo, Hew York.

Alumina grains of No. 36 grit were obtained as in FIG Example 1 used. Then using a two roll coater glued in a known manner. The following sizing mixture was used.

Sizing mixture

ΑΛ 6164 resin

CaCOr, 0

Span 20 Silane "Z-6026

Total:

wet · dry 75 44.83 550 451 75 54.67 550 550 0.30 3 3 0.2 2.75 2, 100.00 1,105.75 1,006.

709831/0230

Footnote: The physical properties of this sizing mixture were as follows: solid content 91%, viscosity 2000 cps, deposition 13.2 kg / Hies. The viscosity setting was carried out as "in the preparation mix.

The glued band-forming matrix is then hardened, bent, cut to width and split to produce a waterproof product similar to that shown in FIG Except that no advance payment was required.

At., This point is to be "noted that both" at which not waterproof product of Example 1 as well as the waterproof product of Example 2, where a fine grain abrasive is used (grit No. 80 and finer), the front one Filling must be applied to the fabric with a doctor blade rather than by roller application. The back filling and the backing remains the same. In this particular case, i.e. a small grain size, the front filling mixture will be used modified as follows.

wet dry %

A1 6164 Resin CaCO-, Span 20

Total: 853 763 100.00

Footnote: The solids content was 89%. The viscosity was 3250 + 250 cps at 32.2 ° C. The mixture was deposited at 4.54 kg / ream on an Iasse basis. The viscosity was adjusted using the same solution as was used in the mixture with the A1 6164 resin and in the sizing solution.

500 410 53.24 350 350 45.87 3 3 0.39

709831/0230

- 99 - ■

was turned.

The cloth was dried to the tack-free state and then put on further processed in the same manner as in Example 1, whereby the desired coated abrasive belts are obtained using the No. 80 grit abrasives or less. ",

Example 3

The polyester sheet was thermoset and as in Example 1 extended or extended. To increase flexibility, however, the steps of the back filling and the back glueing omitted and through, a dip filling process replaced to a tape with a cross-section according to Pig. 3 manufacture.

The dip filling mixture consisted of a 20 % phenol-formaldehyde resin water solution with the following composition:

" wet dry

Pre-size resin 3,000 g 2,100 g

V / ater 7,500 g -

Total; 10,500 g 2,100 g

Footnote: The solids content was 20 %. The presize resin was described in Example 1 above.

The polyester substrate x-jurde is immersed in this solution and squeezed between two rollers and dried. The dry addition was 0.59 kg / ream. The cloth treated in this way received a second immersion application of a total of 1.27 kg / egg, dry application

709831/0230

would take. A front hopper made of 6040 phenol formaldehyde resin / calcium carbonate with 100 cps + 100 cps at 32.2 ° C applied to the immersion-filled sheet to a dry deposition of 3> 6 + 0.91 kg / ream. This front filling had the same composition as in Example 1.

For comparison · the differences in processing at These two examples are in tabular form compiled: .

Comparison to the physical properties of Example 1

Tensile strength, elongation at 3035183

kg / m 'kg / a

Polyester, BF- BS, FF 8429.0 4.8 %

Polyester _s immersion filling FF 7643.2 4.3%

It can be seen that the physical properties of the dip filled polyester products im. Compared to those in Example 1 are appropriate. The dip-filled sheet was then processed in the same way as in Example 1, to make tapes with alumina grains with a grain size No. 36 in an all-resin system. After that, that became The product of this example is compared with the products of example 1, with some of the values being repeated.

709831/0230

Cutting data for 1018 cold rolled steel example 1

Example 3 control cotton Λ control cotton 2

Edge test number of Cut test, contacts g / removed 8.5 955 6th 918 5 882 '·. 3 884

From the values in the table above it can be seen that the Finish plays a role in finish performance because the dip filled product of this example is not as good as the back-lined and back-filled product of Example 1. At the same time, however, the dipped filled product is significantly better than the control cotton product 2. The results of the Edge testing of the table above is an indication of the greater flexibility of the dip-filled product than the back-filled product Product. This is advantageous for applications where greater flexibility is required, given the need for bulk removal remains within acceptable limits.

Example 4-

The polyester sheet was thermoset and de-stretched as in Example 3, but the double dip-fill coating operation described above was replaced by a single dip in order to obtain satisfactory values, where the basic adhesion is not a prerequisite as in Example 1, but a tough underlay is required . The only dip coating mixture consists of a 50 % phenol-formaldehyde-water solution with the following composition:

709831/0230

- * e- 262A029

• si-

Single dip fill composition

(Example 1) wet troelcen To rl eimungshar ζ
water 10,000
4,000 7,000 Sown: 14,000

The polyester substrate was immersed in the solution and then squeezed between two rollers and dried - the ge dry application was 1.36 + 2.27 kg / egg.

A front filling layer made of 60/40 phenol formaldehyde resin / calcium carbonate with 100 cps + 100 cps at 32; 2 ° C. was applied to the immersed sheet material up to a dry deposition of 3563 + 0.91 kg / egg. The composition of the vervrendeten mixture and the properties of the resin% ^r Getting Connected were the "same as in Example. 1

Comparison of 'physical properties '

Tensile strength, elongation at kg / 21 kg / m

Example 1 (control)

Polyester BF, BS, EF 8429.0 4.8 %

'\ Example 3 (control)

Polyester, double immersion and

. 7,643.2 4.3 %

Polyester »single immersion

and PP 7643.2 4.4 %

709831/0230

The above comparison table of physical properties shows that the single-dip and double-dip products are comparable and iia comparison with the control product of Example 1, which has a back fill layer, a back size layer, a front Had filler layer.

The simply immersion-filled and pre-cut cloth product was then processed into tapes as in Example 3 to make all-resin aluminum oxide products with the grit Mr. 36 and the corresponding tapes.

The product produced in this way was combined with the control product according to the invention compared to obtain the following values.

Cutting data for 1018 cold rolled steel .

Edge test number of cut test, Contacts g / removed

Polyester, single immersion 16 "679 Polyester BF, BS, IF

(Control of example 1) 16 + 826

The above table values show that the single-dip filled products do not quite have the basic adhesion of the invention Polyester control product of Example 1. These results also show that the flat cut works better with your product which has a larger grip, namely the product according to the invention of Example 1.

709831/0230

At the same time, the simple, submerged product became too successful, generally operated with a SoC resin cloth on glass resembled.

Example 5

The 100 % polyester sheet with a satin weave, heat-cured and desstretched according to Example 1 and cloth finished as in Example 4, was made into a waterproof product for use as a coated abrasive belt, such product being immersed in a predominantly aqueous solution . In this case, the manufacturing system was changed as in Example 2 so that the phenol formaldehyde resin used for cooling the grains when used in one. such an aqueous system did not adversely lose its properties.

The only other difference between the product of this example and the product of Example 4- was that fine grain silicon carbide was used. This was the size ITr. 80 and it was compared to the waterproof one Control tape product according to the invention tested with the same grain size where the cloth finishing backfilled, resized and was pre-filled. When grinding glass, the following results were obtained.

Table III

removed glass, g stretch, cm waterproof polyester control product 4-126 0.2-4-in one process nit
got two passes

η Po lyes terpx "odukc {" üaiichung u »

front F

709831/0230

-se

These results show the at least comparable cut and the comparable stretching during use of the product, obtained in a two step process compared to the polyester control product.

709831/0230

Blank page

Claims (1)

Patent claims. Backing material for producing a coated abrasive material, characterized in that it consists of a thermoset and unstretched or unstretched woven, polyester-containing sheet or this contains. 2. Underlay material according to claim 1, characterized in that the sheet-like structure made of 100% polyester staple fibers has been woven in a tassel weave. 3. Underlay material according to claim 1, characterized in that it is in combination with a coated Abrasive material is present and that a front filler layer on one side of the backing, a make layer on the front filler layer, a layer of abrasive grains, embedded in the manufacturing layer and a glue layer on top Layer of abrasive grains are provided. 4, backing material according to claim 3 »characterized in that the coated abrasive material is an endless one Band is. 5. Underlay material according to claim 7>% characterized in that the fabric made of 100 % polyester staple fibers has been woven in a satin weave. 6. Underlay material according to claim 5 »thereby g e k e η η ζ indicates that the coated abrasive material is an endless belt. 709831/0230 Λ * 7. documentation material according to claim 3> through this . g e k e η η draws, that the "coated sanding material is a pre-size layer between the front hopper and the making layer contains. 8- underlay material according to claim 7 * characterized in that the fabric is made of 100 % polyester staple fibers in a satin weave. is woven. 9- backing material according to claim 8, characterized in that the coated abrasive material has a final. is loose tape. 10. underlay material according to claim 1, characterized in that it is in combination with a coated Abrasive material is present and that a back coating layer on the back of the pad, a reverse layer of lei on the back mill layer, a front mill layer the front of the backing, a manufacturing layer on the front Mxllschicht, a layer of abrasive grains that are embedded in the manufacturing layer and a glue layer are provided on the layer of abrasive grains. 11. The backing material according to claim 10, characterized in that the coated abrasive material is endless Band is. 12.. Upholstery material according to claim 10, characterized in that the flat structure is woven from 100% polyester staple fibers in a satin weave. 13 «backing material according to claim 12, characterized in that the coated abrasive material is endless Band is ... 709831/0230 14-, underlay material according to. Claim 10, characterized. marked that the coated abrasive material has a presize layer between the front filling chute and the make layer contains. 15 · Backing material "according to claim 14, characterized in that the" coated abrasive material is an endless one Band is. 16. Underlay material according to claim 14, characterized in that the fabric made of 100 % polyester staple fibers has been woven in a satin weave » 17. Backing material according to claim 16, characterized in that the coated abrasive material is an endless one Band is. 18. Underlay material according to claim 1, characterized in that g e k en η ζ indicates that it is in combination with a coated abrasive material and that a dip filler layer on both Sides of the pad, a front one on top of one Side of the dip filler layer, a manufacturing layer on the front 3fü11 layer, a layer of abrasive grains that are in the make coat are embedded and a size coat is provided on the layer of abrasive grains. 19 · Backing material according to claim 18, characterized in that the coated abrasive material is endless Band is. 20. Underlay material according to claim 18, that the I-flat structure is woven from 100 % polyester staple fibers in a satin weave 709 831/0230 has been. 21. Documentation material after. Claim 20, characterized. marked, that the "coated abrasive material is an endless one Band is. 22. Backing material according to claim 18, characterized in that the "coated abrasive material between the front hopper and 'the manufacturing layer a gate - contains sizing layer. 23- Underlay material according to claim 22, characterized in that ζ indicates that the coated abrasive material is an endless belt. 24-. Base material according to claim 22, characterized in that the flat structure made of 100 % polyester staple fibers has been woven in a satin weave. 25 · Underlay material according to claim 24, characterized that the coated abrasive material is an endless one Band is. 26. A method for heat curing and de-stretching or stretching a backing material from a woven polyester-.haltigen sheetlike structure for the production of a coated abrasive material, characterized in that the backing material is kept both under a warp tension and under a weft tension, while on one Temperature and heated for a time sufficient to allow the material to stretch to less than about 6 % at 3035 »85 kg / m while maintaining the desired width 709831/0230 (170 pounds per linear inch) is dimensionally stabilized. 27. The method according to claim 26, characterized in that the fabric is woven from 100% polyester staple fibers in a satin weave. 28. The method according to claim 26, characterized geke η η ζ ei ch η et that a temperature of about 204 "to about 233 ⁰ C (400 to 460 ⁰ F) and that the period of about 0.75 to about 2 minutes long. 29. The method according to claim 28, characterized in that the fabric has been woven from 100% polyester staple fibers in a satin weave. 30. The method according to claim 26, characterized in that one ^{uses a temperature of about 227 C (440 0} F), and that the period extends from about 1 to about 1.5 minutes. 31. The method according to claim 30, characterized in that the fabric has been woven from 100% polyester staple fibers in a satin weave. 32. The method according to claim 26, characterized in that the base material is continuously leads under a chain tension through a tensioning furnace through its assemblies of double chain and clamp, which compilations have a common drive and which automatically apply the weft tension to the base material raise ^ sustained and set free to the gex ^ desired Maintain breadth. 709831/0230 33- procedure according to. Claim 32, characterized in that the fabric made of 100 % polyester staple fibers has been blown in a satin weave. 3 ^ · Method according to claim 32, characterized in that the base material is continuously unwound from a feed roll to the furnace by holding rollers with variable speed, which holding rollers are driven at a slower speed than the assemblies of chain and clamp. 35 · Method according to claim 34, characterized in that the flat structure made of 100 % polyester staple fibers has been woven in a satin weave. 36. A method according to claim 32, characterized in that the backing material continuously passes through en Eändelwalzen variable speed from a supply through the Of which knurling rollers are driven at a lower speed than the combinations of chain and clip. 37 · Method according to claim 36, characterized in that the flat structure is made from 100% polyester staple fibers has been woven in a satin weave. 38. The method according to claim 26, characterized in that one for the production of a coated Abrasive material has a front filler layer on one side of the Backing material applies, applies a make coat on top of the front filler layer, a layer of abrasive grain embedded in the manufacturing layer and that a sizing 709831/0230 schiciit applies to the abrasive layer. 39 · The method according to claim 38 »characterized in that the coated abrasive material ready-treated to form an endless belt » 40. The method according to claim 38, characterized in that the sheet-like structure made of 100% polyester staple fibers has been woven in a satin weave. 41. The method according to claim 40, characterized in that the coated abrasive material finished to form an endless belt. 42. The method according to claim 3Ö, characterized in that there is a pre-size layer between the front fill layer and the make layer. 43- The method according to claim 42, characterized in that the coated abrasive material finished to form an endless belt. 44. The method according to claim 42, characterized in that the fabric has been woven from 100% polyester staple fibers in a satin weave. 45. The method according to claim 44, characterized in that the coated abrasive material finished to form an endless belt. 46. The method according to claim 26, characterized in that one for the production of a coated 709831/0230 Abrasive _{material applies a backfill} on the backside of the backing material, applies a backsize layer to the backfill layer, applies a front filler layer to the front side of the backing material, applies a make coat to the front filler layer, a layer of abrasive grains in the make coat embeds and that a layer of size is applied to the layer of abrasive grains. 47. The method according to claim 46, characterized in that the coated abrasive material completes to form an endless belt. 48. The method according to claim 46, characterized in that the sheet-like structure made of 100 % polyester staple fibers has been woven in a satin weave. 49. The method according to claim 48, characterized in that g e k e η η ζ e i c h η et that you can use the coated abrasive material completes to form an endless belt. 50. The method according to claim 46, characterized in that there is a presize layer between the front fill layer and the manufacturing layer is deposited. 51. The method according to claim 50, characterized in that the coated abrasive material finished to form an endless belt. 52. The method according to claim 50, characterized in that the fabric made of 100 % polyester staple fibers has been woven in a satin weave. 709831/0230 COPY = ¹⁵ S ' ■■ ^c ~ - 53 · The method according to claim 52, characterized in that the coated abrasive material finished to form an endless belt. 54-. Process according to Claim 26, characterized in that a coated Abrasive material applies a dip filler layer on both sides of the backing material, a front one Filling chute applies to one side of the immersion filler layer, a manufacturing layer is applied to the front! embedding a layer of abrasive grains in the make coat and having a size coat on top of it Applying layer of abrasive grains. -σ ^l 55 · The method according to claim 54- * characterized in that the coated abrasive material finished to form an endless belt. 56. The method according to claim 54, characterized geke η η ζ eich η et that the fabric made of 100 % polyester staple fibers has been woven in a satin weave. 57 · The method according to claim ^ 6, characterized in that the coated abrasive material is finished to form an endless belt. 58. The method according to claim 54, characterized in that there is a pre-size layer between the front fill layer and the make layer. 70983 1/0230 toilets
COPY • JtO ' 59. The method according to claim 58, characterized in that the coated abrasive material completes to form an endless belt. 60. The method according to claim 58, characterized in that the fabric made of 100 % polyester staple fibers has been woven in a satin weave. 61. The method according to claim 60, characterized in that g e k e η η draws that the coated abrasive mate rial finished to form an endless belt. 709831/0230 |