EP1021275B1 - Articles abrasifs et leurs preparations - Google Patents

Articles abrasifs et leurs preparations Download PDF

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Publication number
EP1021275B1
EP1021275B1 EP98949487A EP98949487A EP1021275B1 EP 1021275 B1 EP1021275 B1 EP 1021275B1 EP 98949487 A EP98949487 A EP 98949487A EP 98949487 A EP98949487 A EP 98949487A EP 1021275 B1 EP1021275 B1 EP 1021275B1
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EP
European Patent Office
Prior art keywords
abrasive
adhesive
fabric
layer
abrasive article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98949487A
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German (de)
English (en)
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EP1021275A1 (fr
Inventor
Mohamed N. A. Omar
Heinz-Werner Schankweiler
Robert M. Burgess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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Publication date
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Publication of EP1021275A1 publication Critical patent/EP1021275A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0018—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by electrolytic deposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials
    • B24D11/005—Making abrasive webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/02—Backings, e.g. foils, webs, mesh fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/001—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as supporting member
    • B24D3/002—Flexible supporting members, e.g. paper, woven, plastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements

Definitions

  • This invention relates to abrasive articles and to their preparations.
  • the invention relates to abrasive articles of the type comprising a fabric material, discrete areas of electro-deposited metal extending on or through and carried by the fabric material, and having abrasive material embedded in the metal.
  • the preparation of electro-deposited abrasive layers through a fabric material is known in the art and disclosed, for example, in British Patent No. 2 200 920, European Patent No. 13486 and U.S. Patent No. 4,256,467, amongst others.
  • the abrasive layer is formed by laying a length of fabric, for example, a woven or non-woven mesh material, onto an electrically conducting surface and electro-depositing a metal onto the fabric material in the presence of an abrasive mineral such that the mineral becomes embedded in the metal.
  • An insulating material is selectively applied to the fabric material or to the electrically conducting surface before deposition of the metal layer so that the metal can only deposit onto the fabric in those areas not covered by the insulating material, thereby defining the pattern of the abrading surface.
  • a mesh material in the form of a woven fabric of electrically insulating material such as nylon, cotton, terylene, or the like is screen printed with insulating material in the form of ink.
  • the ink is ordinarily waterproof and acid resistant and in its preferred form is colour fast at elevated working temperatures of the abrasive article, for example, up to approximately 220°C.
  • the ink should be compatible with any hot-melt adhesive, which may subsequently be applied to the abrasive layer to secure it to the backing material.
  • the ink may be a resin based or oil based ink and coloured as desired.
  • the screen-printing may be conducted by conventional screen printing techniques in such a manner to ensure that the ink penetrates into and is absorbed onto defined areas of the fabric material leaving discrete areas without any insulating material, which defines the abrasive surface.
  • Such discrete areas may be of any convenient shape and size, for example, circular, diamond-shaped, rectangular, etc.
  • an electrically insulating mask is applied to an electrically conducting surface, for example, a stainless steel drum, the fabric material laid on the electrically conducting surface, and metal electro-deposited through the fabric material in the presence of abrasive material to provide the discrete areas of metal containing abrasive material.
  • an ink may be combined with an adhesive and screen-printed onto the fabric material.
  • the metal is deposited, as described previously, and the resulting abrasive layer may be applied to a backing material by heating the abrasive layer to melt the adhesive content of the insulating material, thereby adhering the backing material to the abrasive layer.
  • the insulating material being an ink, or an ink and adhesive combination.
  • adhesive only may be used as the insulating material.
  • the adhesive may be in the form of a sheet, which is applied to the fabric material before electro-deposition.
  • the adhesive sheet will be perforated and thereby formed with a plurality of openings of the desired shape and size before application to the fabric material.
  • this perforation will be by cutting out the openings from the sheet by any convenient means.
  • the adhesive sheet is then heated when in contact with the fabric material and pressure is applied to cause the adhesive to absorb and enter the spaces in the fabric material. When fully penetrated, the fabric material is cooled.
  • the fabric material is then electro-deposited with metal and abrasive as described previously.
  • the resulting abrasive layer has adhesive at both sides of the fabric material and surrounding the metal areas and can be readily adhered to a backing material by applying the backing material to the rear surface and heating to cause the adhesive to adhere the fabric material to the backing material.
  • the adhesive is preferably a hot-melt adhesive, which is acid resistant and water repellant.
  • abrasive fabrics include the use of a fabric which is electrically conducting either by coating the fabric or fibres with metal or the use of metal fibres upon which metal is electro-deposited in a pattern-wise manner.
  • any metal which may be electro-deposited, may be employed although in practice the metal is normally nickel.
  • a wide range of abrasive particles may be embedded in the metal. Generally, the abrasive particles are diamond or synthetic boron nitride.
  • abrasive fabric The abrasive layers comprising the mesh bearing the abrasive containing metal deposits, hereinafter referred to as "abrasive fabric", is usually bonded to a backing member, for example, a backing sheet of woven material or a solid substrate. Adhesive present in the abrasive fabric may be employed to bond to the backing member and/or adhesive may be applied to the backing and/or the abrasive mesh, for example, by coating, spraying, dipping, lamination, etc.
  • the abrasive fabric is bonded under heat and pressure to a polyester-cotton fabric backing utilizing a hot-melt polyester adhesive.
  • the adhesive may be applied in the form of a separate film, which is commercially available on a release paper carrier or may be present on the surface of the polyester-cotton fabric.
  • the heat and pressure of the bonding operation causes the hot-melt adhesive to flow penetrating the abrasive fabric.
  • This bonding technique has been used in respect of abrasive products in the form of discs, blocks, files, and pads.
  • the other surface of this polyester-cotton fabric backing may be bonded to a block, pad, or provided with an attachment surface for attachment of the abrasive product to a suitable support.
  • a solution of a two-part, cross-linkable polyurethane adhesive is prepared and the abrasive fabric is completely immersed in the solution and thereafter removed and allowed to dry. This operation is generally repeated at least once to build up a satisfactory thickness of adhesive.
  • One side of a flexible cloth backing substrate is coated with the same adhesive solution and allowed to dry. At least one further coat is generally applied.
  • the backside of the abrasive fabric and adhesive coated side of the cloth are placed in contact and heat and pressure applied to effect a bond.
  • Products comprising abrasive mesh bonded to a backing have been commercially available since the mid-1980 under the Registered TradeMarks DIAPAD and 3M.
  • the abrasive materials have been available in the form of belts, discs, pads, and blocks, etc. and have been employed for abrading a wide range of hard materials including metals, glass and stones, such as, granite, marble, etc. Under certain severe conditions of use, particularly at high temperatures, it has been found that the metal deposits may be delaminated from the backing; and in extreme cases, the fabric may tear resulting in metal deposit being removed from the abrasive material.
  • primers such as 3M 901 Silane Primer, Loctite SIP (self-indicating primer), Bostick 9253 primer, and Ciba Geigy DZ81 acid etch primer have been employed with adhesive but any improvement in properties was found to be marginal.
  • a range of different adhesives for example, reactive polyurethanes, polyesters, rubber, nitrile rubber, polythene, and polychloroprene rubber, have been employed without significant improvement in properties.
  • WO 96/09139 relates to abrasive articles comprising a multiplicity of metal sediments which are located some distance apart and are bound to a carrier material such that at least one part of each metal sediment is exposed on an outer surface of the carrier material, abrasives being embedded in said metal sediments or adhering to the top surfaces of said metal sediments, said metal sediments being obtained via a known electroplating technique, such as, for example, electrodeposition, currentless sedimentation or vacuum deposition.
  • an abrasive article comprising:
  • an abrasive article comprising:
  • the products of the invention exhibit improved delamination resistance of the metal deposits which results in longer lifetime and improved cutting rates for the abrasive articles.
  • FIG. 1 is a cross-sectional view of an abrasive article of the invention.
  • the smooth surface of the metal deposits formed when the metal was electro-deposited on the electrically conducting surface did not provide an optimum surface for adhesive bonding. However, it was not believed to be readily feasible to roughen the surface. Electro-deposition of metal onto a roughened electrically conductive surface would result in mechanical bonding of the metal deposit preventing removal. Depending upon the fabric material, the abrasive fabric may be extremely flexible and easily torn which reduces the possibility of roughening of the surface of the metal deposits by mechanical means. The use of primers to modify the surface properties, including those, which etch the surface, did not provide significant improvement.
  • the grit blasting may be conducted on any suitable machine, for example, Registered TradeMark GUYSON Model 300/20AD blast cleaning machine.
  • the abrasive fabric may conveniently be supported from beneath on the bed of a grit-blasting machine. Alternatively, it may be clamped in any suitable position, for example, horizontally or vertically, in the path of the grit particles.
  • Suitable grit include 36 to 80 grit aluminum oxide (such as Alumina Size 46 supplied by Abrasive Developments Ltd. of Henley-in-Arden, U.K.) or chilled iron grit.
  • grit blasting is conducted for up to 10 seconds per square inch (6,45 cm 2 ), preferably for a period of from 2 to 5 seconds per square inch (6,45cm 2 ).
  • the treated abrasive mesh is dipped in solvent, for example, isopropyl alcohol, etc. to remove any dirt and thereafter bonded to a backing by conventional techniques.
  • solvent for example, isopropyl alcohol, etc.
  • the grit blasting provides a significant increase in surface roughening. Comparisons of the surface before and after grit blasting using UBM Topography equipment by placing samples on a glass slide and measuring an area of 0.25mm x 0.25mm reveal an increase in Rz (average of 5 deepest scratches) from 2.1 ⁇ m to 6.6 ⁇ m and an increase in Ra (average surface finish) from 0.4 to 1.5 ⁇ m. Besides abrasion, any operation that provides the roughened surface finish can be used.
  • abrading techniques may be employed to abrade the surface of the metal deposits, for example, mechanical abrading using an abrasive belt or a non-woven abrasive web in the form of a wheel. sheet or belt etc. Suitable non-woven abrasives are available from Minnesota Mining and Manufacturing Company, St. Paul, MN (3M) under the Registered TradeMark SCOTCHBRITE.
  • the abrading process desirably increases Ra to at least 0.7 ⁇ m, preferably at least 1.0 ⁇ m, more preferably about 1.5 ⁇ m.
  • the abrading process desirably increase Rz to at least 3 ⁇ m, preferably at least 4 ⁇ m, more preferably at least 5 ⁇ m.
  • Epoxy-acrylate resins of the type disclosed in U.S. Patent No. 5,086,088 provide improved bonding between the metal deposits and backing both for grit blasted and untreated metal deposits.
  • Such materials are pressure-sensitive thermosetting adhesives comprising from about 30% to about 80% by weight of a photopolymerisable prepolymeric or monomeric syrup containing an acrylic ester and a polar copolymerisable monomer, from about 20% to about 60% by weight of an epoxy resin or a mixture of epoxy resins containing no photopolymerisable groups, from about 0.5% to about 10% by weight of a heat-activatable hardener for the epoxy resin, from about 0.01% to about 5% of a photoinitiator, and from 0% to about 5% of a photocrosslinking agent.
  • Imidazoles and thermally expandable thermoplastic microspheres may be utilized in the adhesive formulation.
  • Adhesives of this type are commercially available from 3M as 3M Epoxy Tape 9245.
  • the abrasive articles of the invention may be prepared by laminations under pressure of the abrasive fabric to the backing using the 3M Epoxy Tape 9245.
  • the abrasive material comprises a fabric (2) in the form of a one-over-one mesh having warp filaments (4) and weft filaments (6).
  • the fabric has discrete islands (8) of electro-deposited metal having abrasive grains (10) embedded in the top surface of the islands.
  • the elements denoted by reference numerals 2 to 10 constitute an abrasive fabric.
  • the lower surface (12) of the electro-deposited islands (8) is roughened by abrading, for example, grit blasting.
  • the fabric materials used to make the abrasive fabric may be selected from a wide range of materials, which may be insulating or electrically conductive depending upon the method for manufacturing the abrasive fabric.
  • Suitable electrically insulating materials include woven and non-woven fabrics of cotton, nylon, polyester, Terylene, and Kevlar.
  • Preferred insulating fabrics for use in the invention comprise screen printing cloths, particularly monofilament polyester one-over-one weave screen printing cloths.
  • Electrically conducting materials may be woven or non-woven and may comprise conducting fibres such as metals, or insulating fibres, which are at least partially coated with a conducting material.
  • the abrasive fabrics used in the following Examples were identical to the abrasive fabrics used in the abrasive materials Green 21, Black 18 and Red 18 commercially available from 3M United Kingdom plc.
  • the abrasive fabrics comprise a monofilament polyester one-over-one mesh cloth having a mesh size of 55 ⁇ m and a strand thickness of 27 ⁇ m; the fabric is commercially available under the trade designation PES 55/27 from Sercol fabric having circular islands of electrodeposited nickel having diamond embedded therein.
  • Green (GN) denotes a diamond particle size of 250 ⁇ m
  • Black (BK) denotes a diamond particle size of 125 ⁇ m
  • Red (RD) denotes a diamond particle size of 74 ⁇ m.
  • the numeral 21 refers to a pattern of large circular islands of about 4 mm diameter and the numeral 18 refers to a pattern of small circular islands of about 1.5 mm.
  • GN21 and BK18 abrasive fabrics were grit blasted in a Registered TradeMark GUYSON Model 300/20AD blast cleaning machine using aluminum oxide Safti Grit White 46 for about 5 seconds per square inch.
  • the abrasive fabrics were dipped in isopropylalcohol to remove any dirt.
  • the abrasive fabrics were dipped in an adhesive bath comprising 46 parts Bostik 3206 adhesive, 6 parts Bostik D1000 activator, and 48 parts Bostik M576 thinner, and suspended from one end to drip dry. The operation was repeated suspending from the opposite end.
  • a polycotton backing material was roller coated with an adhesive composition comprising 71 parts Bostik 3206 adhesive, 9 parts Bostik D1000 activator, and 20 parts Bostik M576 thinner, and allowed to dry. A second coat of adhesive was applied.
  • the backing was laminated to the back of the abrasive mesh material under heat and pressure.
  • the backing and abrasive mesh material were placed in a horizontal platten press and heated to 120°C for 5 seconds under a pressure of about 6 lb/in 2 (41.4 kPa).
  • the laminate was passed through the nip of two rollers having a diameter of 76.2 mm (3 inches) and a length of 270 mm, one roller was steel and the other roller having a silicon coating.
  • the rollers were pressurized by 2-inch diameter (5 cm) air rams at each end under an air pressure of 100 lb/in 2 (689 kPa).
  • the front of the resulting material was roller coated with adhesive and a polycotton substrate laminated thereto leaving unbonded tails at one edge of the resulting laminate. Additional samples were prepared using standard GN21 and BK18 materials.
  • Black 18 and Red 18 abrasive fabrics were grit blasted as described in Example 1.
  • the abrasive mesh materials were dipped in isopropyl alcohol to remove any dirt.
  • a backing substrate comprising polyester-cotton blended woven cloth with a film of polyester hot-melt adhesive was pre-pressed for 20 seconds at elevated temperature to force the adhesive into to the cloth.
  • the abrasive fabric was then laminated to the prepared polyester-cotton cloth by hot pressing the abrasive fabric against the hot-melt adhesive for 20 to 25 seconds to reflow the adhesive and form a bond.
  • the front of the resulting material was laminated to a polycotton substrate and tested as in Example 1.
  • Grit blasting improves the bond between the metal deposits and backing.
  • adhesive residue was attached to the back of the metal deposits whereas the back of the metal deposits in the standard materials were clean.
  • some samples of the invention broke on the face of the diamond abrasive which would indicate the possibility of a higher real bond, which would mean a true measure of the effect of abrading the material could not be obtained. This is because the failure point of this test is normally always where the lamination of the abrasive member to the backing parts and not the failure of the abrasive member to the front supportive carrier as happened here.
  • Belts (75 x 1850 mm) were made by bonding abrasive mesh to a backing as in Example 1.
  • One belt was a 3M 6400J standard N125 micron pattern 18 using BK18 abrasive mesh.
  • a second belt was made using grit blasted BK18 as in Example 1.
  • a third belt was prepared by bonding BK18 abrasive mesh to the backing using 3M Epoxy Tape 9245. The tape was rolled onto the back of the abrasive mesh using a hand held roller. The release paper was then removed from the tape and the material was again rolled onto the backing material. This sandwich was then cured between two press plates at a laminating temperature of 140°C.
  • the belts were then tested on a revolving belt machine which was driven by an electric motor via a 200 mm diameter drive roller at a machine speed of 40 m/s with a contact wheel of 200 mm diameter using a 20 m diameter glass rod as test piece.
  • each belt was subjected to a series of sequential tests as reported in the following Table.
  • the glass rod was held in contact with the belt under the specified pressure until a 20, 30 or 40 mm increment of glass had been cut.
  • the cycle was repeated for further increments until the total cut reported in the Table was reached.
  • the time to achieve the specified cut was measured, and the cut rate calculated.
  • the tests increased in severity until failure of the belts occurred.
  • the following Table reports the conditions for each test, the total cut, the cut rate for each test and the overall cut rate.
  • Epoxy belt gave the best cut rates particularly at the pressure changes, and whilst it was clearly better than the "standard" belt in terms of total cut, it was not better than the grit blasted construction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (18)

  1. Article abrasif comprenant :
    un tissu abrasif comprenant un tissu (2) ayant des zones discrètes (8) de métal électro-déposé s'étendant dessus ou le traversant et ayant une matière abrasive (10) incorporée dans le métal ;
    une couche d'adhésif (14) ; et
    un substrat support (16) ;
    le tissu abrasif étant lié au substrat support (16) par la couche d'adhésif (14), caractérisé en ce que la couche d'adhésif (14) comprend un adhésif thermodurcissable époxy-acrylate et éventuellement la surface du tissu abrasif lié au substrat support (16) a été rugosifiée.
  2. Article abrasif selon la revendication 1, dans lequel le métal est le nickel.
  3. Article abrasif selon la revendication 1 ou 2, dans lequel la matière abrasive (10) est le diamant ou le nitrure de bore cubique.
  4. Article abrasif selon l'une quelconque des revendications précédentes, dans lequel la couche d'adhésif (14) comprend un adhésif polyuréthanne.
  5. Article abrasif selon l'une quelconque des revendications 1 à 3, dans lequel la couche d'adhésif (14) est un adhésif thermo-fusible.
  6. Article abrasif selon la revendication 5, dans lequel la couche d'adhésif (14) est un polyester.
  7. Article abrasif selon l'une quelconque des revendications 1 à 3, dans lequel la couche d'adhésif (14) comprend un auto-adhésif thermodurcissable qui est le produit réactionnel de photopolymérisation d'un mélange composé essentiellement de :
    (a) d'environ 30% à environ 80% en poids d'un sirop monomère ou prépolymère photopolymérisable contenant un ester de l'acide acrylique et d'un-alcool, non tertiaire, et un monomère copolymérisable modérément polaire ;
    (b) d'environ 20% à environ 60% en poids d'une résine époxy ou d'un mélange de résines époxy ne contenant pas de groupes photopolymérisables ;
    (c) d'environ 0,50% à environ 10% en poids d'un durcisseur thermo-activable pour la résine époxy ;
    (d) d'environ 0,01% à environ 5% d'un photoamorceur ; et
    (e) de 0% à environ 5% d'un agent de photoréticulation.
  8. Article abrasif selon l'une quelconque des revendications précédentes, dans lequel la rugosification de la surface est obtenue par abrasion.
  9. Article abrasif selon l'une quelconque des revendications précédentes, dans lequel la rugosification de la surface est obtenue par grenaillage.
  10. Article abrasif selon l'une quelconque des revendications précédentes sous forme d'une ceinture.
  11. Article abrasif selon l'une quelconque des revendications 1 à 9 sous forme de tampon, disque, bloc, bande ou rouleau.
  12. Procédé pour fabriquer un article abrasif selon l'une quelconque des revendications 1 à 6, comprenant les étapes consistant à :
    fournir un tissu abrasif comprenant un tissu (2) ayant des zones discrètes (8) de métal électro-déposé s'étendant dessus ou le traversant et ayant une matière abrasive (10) incorporée dans le métal ; et
    lier le tissu abrasif à un substrat support (16) avec une couche d'adhésif (14) ;
    caractérisé en ce qu'avant d'être en contact avec la couche d'adhésif (14), la surface du tissu abrasif est rugosifiée et la couche d'adhésif (14) comprend un auto-adhésif thermodurcissable, qui est le produit réactionnel de photopolymérisation d'un mélange composé essentiellement :
    (a) d'environ 30% à environ 80% en poids d'un sirop monomère ou prépolymère photopolymérisable contenant un ester de l'acide acrylique et d'un alcool non tertiaire et un monomère copolymérisable modérément polaire ;
    (b) d'environ 20% à environ 60% en poids d'une résine époxy ou d'un mélange de résines époxy ne contenant pas de groupes photopolymérisables ;
    (c) d'environ 0,5% à environ 10% en poids d'un durcisseur thermo-activable pour la résine époxy ;
    (d) d'environ 0,01% à environ 5% d'un photoamorceur ; et
    (e) d'environ 0% à environ 5% d'un agent de photoréticulation.
  13. Procédé selon la revendication 12, dans lequel la surface du tissu abrasif est rugosifiée par abrasion.
  14. Procédé selon la revendication 13, dans lequel la surface est abrasée par grenaillage.
  15. Procédé selon la revendication 14, dans lequel le grenaillage est réalisé en utilisant une taille de grains de 36 à 80.
  16. Procédé selon la revendication 13 ou 14, dans lequel le grain est choisi parmi l'oxyde d'aluminium et la grenaille de fonte.
  17. Procédé pour fabriquer un article abrasif comprenant les étapes consistant à :
    fournir un tissu abrasif comprenant un tissu (2) ayant des zones discrètes (8) de métal électro-déposé s'étendant dessus ou le traversant et ayant une matière abrasive (10) incorporée dans le métal ; et
    lier le tissu abrasif à un substrat support (16) avec une couche d'adhésif (14) ;
    caractérisé en ce que la couché d'adhésif (14) comprend un auto-adhésif thermodurcissable époxy/acrylate.
  18. Procédé selon la revendication 17, dans lequel la couche d'adhésif (14) comprend un auto-adhésif thermodurcissable, qui est le produit réactionnel de photopolymérisation d'un mélange composé essentiellement :
    (a) d'environ 30% à environ 80% en poids d'un sirop monomère ou prépolymère photopolymérisable contenant un ester de l'acide acrylique et d'un alcool non tertiaire, et un monomère copolymérisable modérément polaire ;
    (b) d'environ 20% à environ 60% en poids d'une résine époxy ou d'un mélange de résines époxy ne contenant pas de groupes photopolymérisables ;
    (c) d'environ 0,50% à environ 10% en poids d'un durcisseur thermo-activable pour la résine époxy ;
    (d) d'environ 0,01% à environ 5% d'un photoamorceur ; et
    (e) de 0% à environ 5% d'un agent de photoréticulation.
EP98949487A 1997-10-09 1998-09-23 Articles abrasifs et leurs preparations Expired - Lifetime EP1021275B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9721494.4A GB9721494D0 (en) 1997-10-09 1997-10-09 Abrasive articles and their preparations
GB9721494 1997-10-09
PCT/US1998/020048 WO1999019116A1 (fr) 1997-10-09 1998-09-23 Articles abrasifs et leurs preparations

Publications (2)

Publication Number Publication Date
EP1021275A1 EP1021275A1 (fr) 2000-07-26
EP1021275B1 true EP1021275B1 (fr) 2002-08-28

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EP98949487A Expired - Lifetime EP1021275B1 (fr) 1997-10-09 1998-09-23 Articles abrasifs et leurs preparations

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WO2004108358A2 (fr) * 2003-06-06 2004-12-16 Applied Materials, Inc. Article de polissage conducteur pour polissage electrochimique et mecanique
KR100801333B1 (ko) * 2006-11-22 2008-02-05 김효영 메쉬망 및 합성수지재를 결합한 다이아몬드 공구
SG158775A1 (en) * 2008-07-28 2010-02-26 Kinik Co Grinding tool and method for fabricating the same
KR20210124337A (ko) 2019-02-11 2021-10-14 쓰리엠 이노베이티브 프로퍼티즈 컴파니 연마 물품

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CN1125413A (zh) * 1993-06-17 1996-06-26 美国3M公司 具有可挠无端无缝背衬的磨料带及其制法
NL9401528A (nl) * 1994-09-21 1996-05-01 Sandro Giovanni Guiseppe Ferro Schuurvoorwerp en werkwijze voor het maken daarvan
DE69505643T2 (de) * 1995-05-18 1999-06-17 Sandro Giovanni G Ferronato Schleifelement zum Trockenschleifen und -Polieren und Verfahren zur Herstellung

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EP1021275A1 (fr) 2000-07-26
KR20010031022A (ko) 2001-04-16
CA2303518A1 (fr) 1999-04-22
GB9721494D0 (en) 1997-12-10
DE69807511T2 (de) 2003-05-15
DE69807511D1 (de) 2002-10-02
WO1999019116A1 (fr) 1999-04-22
JP2001519250A (ja) 2001-10-23

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