EP0004454A2 - Outils abrasifs revêtus - Google Patents

Outils abrasifs revêtus Download PDF

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Publication number
EP0004454A2
EP0004454A2 EP79300441A EP79300441A EP0004454A2 EP 0004454 A2 EP0004454 A2 EP 0004454A2 EP 79300441 A EP79300441 A EP 79300441A EP 79300441 A EP79300441 A EP 79300441A EP 0004454 A2 EP0004454 A2 EP 0004454A2
Authority
EP
European Patent Office
Prior art keywords
sheet
dots
abrasive
grit
binder
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.)
Withdrawn
Application number
EP79300441A
Other languages
German (de)
English (en)
Other versions
EP0004454A3 (fr
Inventor
Robert Michael Barron
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0004454A2 publication Critical patent/EP0004454A2/fr
Publication of EP0004454A3 publication Critical patent/EP0004454A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • an abrasive sheet comprising a flexible substrate carrying a multiplicity of discrete dots each consisting of an adhesive binder material containing abrasive or other mineral particles.
  • the dots are conveniently, but not necessarily, circular in plan. They may have the form of heaps or mourds of material or may be flattened to a disc. Conveniently, but again not necessarily, they are arranged in a regular array, for example in rows with the dots in alternative rows mid-way between pairs of dots in each of the adjacent rows. The area between the dots is preferably left entirely untreated and free of applied material in order to preserve the flexibility of the substrate.
  • the abrasive sheet in accordance with the invention can be manufacturer by stencilling through a perforated plate, either using a mixture of abrasive particles and binder or employing binder alone. In the latter case the abrasive particles are applied subsequently before the binder is hardened.
  • An adhesive ink is prepared. Its properties must be such that it initially behaves :n a satisfactory way whilst boing stencilled, then holds its stencilled shape during the subsequent drying and hardening operations. It must then of course behave as an extremely effective adhesive to hold the various types of grits to the substrates and maintain this adhesion in use when the sheet might become quite hot. In many applications it will also be required to be water or oil resistant.
  • the adhesive ink will be almost paste-like in its rheology, especially if already filled with grit.
  • the substrate material is laid out on a flat surface upon which is a 2mm layer of ;oft rubber and the perforated stencil screen in the form of a flat sheet is placed on top. The edges may be held down with clips.
  • the adhesive ink is spread out across one end of the stencil and then smeared across the stencil using a tough rubber squeegee blade.
  • the substrate and stencil are then peeled apart after which the abrasive grit can be added if following the method (2) above.
  • the dots can be dried and cured by placing the substrate sheet into an oven at a temperature time appropriate to the chemistry of the particular adhesive binder.
  • the dots can be pressed prior to, or during the curing stage to ensure that each one has the same height and a similar profile, and/or to increase the area covered by each dot beyond that given by the pattern in the particular stencil screen,
  • a conventional flat-bed screen printing machine can be easily converted for the production of this abrasive sheet
  • a rotary technique may be used, where the stencil screen is in the form of a cylinder, This rotary method is continuous and is preferred where a high output is needed using a continuous web of base material. Long drying tunnels are of course essential in this latter method, although reels of dried, coated base can be subsequently cured in simple ovens where necessary.
  • a paper sheet 1 has a backing layer 2 of flexible synthetic plastics foam material for a purpose to be described.
  • the front face of the sheet 1 carries a plurality of flattened circular dots 3 consisting of abrasive particles in a resin binder which serves to bind the particles together and adhere them to the sheet.
  • the dots 3 are in a regular array consisting of rows in each of which the dots are equally spaced by a distance s, every other row being offset by an amount equal to half the centre-to-centse spacing of the dots.
  • the ratio of hole diameter (d) to stencil thickness (tl should be at least 3:1 and preferably more than 4;1 i.e. ⁇ 3
  • a coarse grade i.e. grit Nos.'s below 70 mesh
  • the larger diameter of the discs also results in better overall adhesion of the dots/discs to the substrate which is useful since "coarse" grades of abrasive sheets are often used in the severest way.
  • maximum rate of cut and/or maximum working life is required from the final sheet irrespective of grit size, or coating weight, then the largest diameter dots should be specified.
  • the final height of the stencilled dot can be up to 2 - 3 times the thickness of the stencil, according to the pressure applied to the squeegee during the printing stroke.
  • abrasive materials e.g. diamond, boron nitride, tungsten carbide, silicon carbide, aluminium oxide, emery, garnet, various sands, flints, glasses etc.
  • Particle sizes will typically be from B.S.S. mesh number 1000 up to heavy 20 mesh grits, i.e. particle diameters of about 20p to 1000 ⁇ .
  • the preferred Bases are:-
  • foams are laminated to the abrasive dot coated base materials by either conventional flame-bonding techniques, or by the use of appropriate adhesives.
  • the grit-to-resin binder ratio As a guide to the end-product design.
  • a grit-to-binder ratio of about 5 : 1 is suitable, if the base is paper, and the binder contains thermosetting resin.
  • the abrasive dots show good adhesion to the base paper, excellent abrasive properties and a low wear rate in use. Should it Be required to have a faster rate of wear (grit loss) as, for example, if the sheet is to be used for cutting the surface of metals, then the grit-to-binder ratio should be increased to 7 or 8:1.
  • a more absorbent backing such as a woven cotton needs proportionately more resin in the mix to achieve adequate adhesion of the stencilled dots to the base fabric.
  • a grit-to-binder ratio of 2 or 3 : 1 is more appropriate.
  • COATING WEIGHTS These will depend to a great extent on the size of grit used, whether or not multilayers are present, and the area taken up by the stencilled dots. They will range between 50 - 1000 g/m 2 (total, dried and cured dots).
  • a general purpose sanding sheet based on Aluminium Oxide grit at a grit-to-binder ratio of 5 : 1, and stencilled through the preferred screens as specified, will have complete, dried coating weights of:
  • the dots are first dried at 90°C for two minutes to drive out the water, then at 15 0 0 C for a further 2 minutes to flux and consolidate the resin.
  • This product is an improved version of (.1). It lasts slightly longer, and can be used wetted with water for short periods.
  • Pot life is 3 - 4 hours at room temperatu
  • This particular adhesive has the best properties as a stencil paste, It can tolerate the widest range of grit sizes (mesh No. 40 upwards) in grit-to-binder ratios of up to 10 : 1.
  • foam-backed samples are all 2 mm. crosslinked poly(ethylene), either low density for hand sheets and orbital sander sheets, or high density for sanding discs.
  • Adhesion, abrasiveness, durability, and comparison with.current commercial coated abrasives are assessed by the "brick test" as follows:-
  • the total weight of brick removed during each abrasion test gives a direct value to the "abrasive capacity" of each sample.
  • the commercial grade of "medium” aluminium oxide paper (English Abrasives Atlas Brand) removed 0.56 g. of brick dust before wearing out.
  • the equivalent grades of stencilled products (foambacked) removed 3.23 g. and 7.40 g. respectively for small and large dot sizes, i.e. 5.8 and 13.2 times better.
  • the rate of cut was about equivalent between the Atlas Brand and the small dot sheet, but nearly three times faster with the large dot sheet. This unexpected result indicates that the edge of the abrasive dots is acting as a second source of abrasion.
  • the diameter of the dots is an important factor in the design of the new abrasive sheets as it is now possible to achieve high removal rates without being confined to the use of coarse grits (and hence coarse finishes).
  • the "fine" stencilled product small dots, foambacked
  • the "fine" samples based on the largest dots showed quite amazing results for such a fine grit size, i.e. a cutting rate more than twice that of the commercial 3M Production Paper, and an abrasive capacity of 1.38 g, which is 27.5 times as much as the 3M sheet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP79300441A 1978-03-23 1979-03-20 Outils abrasifs revêtus Withdrawn EP0004454A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1176678 1978-03-23
GB1176678 1978-03-23
GB7905338 1979-02-15
GB7905338 1979-02-15

Publications (2)

Publication Number Publication Date
EP0004454A2 true EP0004454A2 (fr) 1979-10-03
EP0004454A3 EP0004454A3 (fr) 1979-10-31

Family

ID=26248504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79300441A Withdrawn EP0004454A3 (fr) 1978-03-23 1979-03-20 Outils abrasifs revêtus

Country Status (3)

Country Link
EP (1) EP0004454A3 (fr)
JP (1) JPS54133691A (fr)
BR (1) BR7901769A (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052758A2 (fr) * 1980-11-20 1982-06-02 Walter Klingspor Article abrasif et flexible, par exemple en forme d'arc, bande, disque ou analogue
EP0095055A2 (fr) * 1982-05-25 1983-11-30 Dr. Elbel Schleifmittel GmbH Procédé de fabrication d'un corps abrasif
EP0276946A2 (fr) * 1987-01-24 1988-08-03 Minnesota Mining And Manufacturing Company Produit abrasif
EP0331344A2 (fr) * 1988-02-26 1989-09-06 Minnesota Mining And Manufacturing Company Feuille abrasive ayant des grains abrasifs positionnés individuellement
US4966609A (en) * 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article
WO1992012827A1 (fr) * 1991-01-25 1992-08-06 Carbide Tools International A/S Bande de sablage
US5212910A (en) * 1991-07-09 1993-05-25 Intel Corporation Composite polishing pad for semiconductor process
EP0554668A1 (fr) * 1992-01-13 1993-08-11 Minnesota Mining And Manufacturing Company Article abrasif ayant un espacement latéral précis entre les éléments abrasifs composites
GB2281075A (en) * 1993-08-18 1995-02-22 Hiroshi Hashimoto Grinding tool having abrasive protruberances on the surface thereof
US5527215A (en) * 1992-01-10 1996-06-18 Schlegel Corporation Foam buffing pad having a finishing surface with a splash reducing configuration
US5551960A (en) * 1993-03-12 1996-09-03 Minnesota Mining And Manufacturing Company Article for polishing stone
US5913713A (en) * 1997-07-31 1999-06-22 International Business Machines Corporation CMP polishing pad backside modifications for advantageous polishing results
US6081959A (en) * 1996-07-01 2000-07-04 Umbrell; Richard Buffer centering system
US6105197A (en) * 1998-04-14 2000-08-22 Umbrell; Richard T. Centering system for buffing pad
US6298518B1 (en) 1998-04-14 2001-10-09 Richard T. Umbrell Heat dissipating buffing pad
US6439979B1 (en) * 1992-02-12 2002-08-27 Tokyo Electron Limited Polishing apparatus and polishing method using the same
US6473266B1 (en) 2000-08-31 2002-10-29 Imation Corp. Magnetic recording diskette having reduced-area fabric liner
WO2012003116A1 (fr) * 2010-07-02 2012-01-05 3M Innovative Properties Company Articles abrasifs revêtus
CN101421077B (zh) * 2006-04-14 2012-06-13 3M创新有限公司 片状磨料制品以及砂磨工具组件
EP1979132B1 (fr) 2006-02-04 2017-01-25 Carl Freudenberg KG Element de recurage
US9630297B2 (en) 2011-12-29 2017-04-25 3M Innovative Properties Company Coated abrasive article and method of making the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6524681B1 (en) 1997-04-08 2003-02-25 3M Innovative Properties Company Patterned surface friction materials, clutch plate members and methods of making and using same

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR355676A (fr) * 1905-06-28 1905-11-09 Robert Helmuth Lasch Disques, feuilles ou autres surfaces pour polir ou repasser
US1657784A (en) * 1925-11-23 1928-01-31 Gustave A Bergstrom Abrasive-covered material and the like
US1953983A (en) * 1928-02-07 1934-04-10 Carborundum Co Manufacture of rubber bonded abrasive articles
GB433880A (en) * 1934-02-22 1935-08-22 Carborundum Co Improvements in or relating to flexible abrasive coated articles and the manufacturethereof
GB456985A (en) * 1935-05-18 1936-11-18 Carborundum Co Improvements in abrasive articles
US2073167A (en) * 1936-10-23 1937-03-09 American Floor Surfacing Mach Surface cleaning means
US2292261A (en) * 1940-02-19 1942-08-04 Albertson & Co Inc Abrasive disk and method of making the same
US2410506A (en) * 1942-07-15 1946-11-05 Carborundum Co Coated abrasive
FR1089599A (fr) * 1953-09-15 1955-03-18 Ruban abrasif
US2743559A (en) * 1953-04-10 1956-05-01 Bay State Abrasive Products Co Abrasive bands
US2804733A (en) * 1953-05-21 1957-09-03 Rexall Drug Company Abrasive article
FR1400574A (fr) * 1964-04-17 1965-05-28 S P A M Procédé de réalisation et disques abrasifs en découlant
US3353308A (en) * 1963-06-04 1967-11-21 Zane Riccardo Flexible abrasive disc
CH453940A (de) * 1966-08-04 1968-03-31 Swarovski Tyrolit Schleif Flexibles Schleifwerkzeug
FR2147606A5 (fr) * 1971-07-27 1973-03-09 Dh Prowse Cy Ltd

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR355676A (fr) * 1905-06-28 1905-11-09 Robert Helmuth Lasch Disques, feuilles ou autres surfaces pour polir ou repasser
US1657784A (en) * 1925-11-23 1928-01-31 Gustave A Bergstrom Abrasive-covered material and the like
US1953983A (en) * 1928-02-07 1934-04-10 Carborundum Co Manufacture of rubber bonded abrasive articles
GB433880A (en) * 1934-02-22 1935-08-22 Carborundum Co Improvements in or relating to flexible abrasive coated articles and the manufacturethereof
GB456985A (en) * 1935-05-18 1936-11-18 Carborundum Co Improvements in abrasive articles
US2073167A (en) * 1936-10-23 1937-03-09 American Floor Surfacing Mach Surface cleaning means
US2292261A (en) * 1940-02-19 1942-08-04 Albertson & Co Inc Abrasive disk and method of making the same
US2410506A (en) * 1942-07-15 1946-11-05 Carborundum Co Coated abrasive
US2743559A (en) * 1953-04-10 1956-05-01 Bay State Abrasive Products Co Abrasive bands
US2804733A (en) * 1953-05-21 1957-09-03 Rexall Drug Company Abrasive article
FR1089599A (fr) * 1953-09-15 1955-03-18 Ruban abrasif
US3353308A (en) * 1963-06-04 1967-11-21 Zane Riccardo Flexible abrasive disc
FR1400574A (fr) * 1964-04-17 1965-05-28 S P A M Procédé de réalisation et disques abrasifs en découlant
CH453940A (de) * 1966-08-04 1968-03-31 Swarovski Tyrolit Schleif Flexibles Schleifwerkzeug
FR2147606A5 (fr) * 1971-07-27 1973-03-09 Dh Prowse Cy Ltd

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052758A3 (fr) * 1980-11-20 1984-02-01 Walter Klingspor Article abrasif et flexible, par exemple en forme d'arc, bande, disque ou analogue
EP0052758A2 (fr) * 1980-11-20 1982-06-02 Walter Klingspor Article abrasif et flexible, par exemple en forme d'arc, bande, disque ou analogue
EP0095055A2 (fr) * 1982-05-25 1983-11-30 Dr. Elbel Schleifmittel GmbH Procédé de fabrication d'un corps abrasif
EP0095055A3 (en) * 1982-05-25 1984-02-22 Sea Schleifmittel Entwicklung Anwendung Gmbh Flexible abrasive body and method of manufacturing the same
US4539017A (en) * 1982-05-25 1985-09-03 Sea Schleifmittel Entwicklung Anwendung Gmbh Elastic grinding element and method for producing it
EP0276946A3 (en) * 1987-01-24 1990-11-07 Interface Developments Limited Abrasive article
EP0276946A2 (fr) * 1987-01-24 1988-08-03 Minnesota Mining And Manufacturing Company Produit abrasif
EP0331344A2 (fr) * 1988-02-26 1989-09-06 Minnesota Mining And Manufacturing Company Feuille abrasive ayant des grains abrasifs positionnés individuellement
EP0331344A3 (fr) * 1988-02-26 1991-08-07 Minnesota Mining And Manufacturing Company Feuille abrasive ayant des grains abrasifs positionnés individuellement
US4966609A (en) * 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article
WO1992012827A1 (fr) * 1991-01-25 1992-08-06 Carbide Tools International A/S Bande de sablage
US5212910A (en) * 1991-07-09 1993-05-25 Intel Corporation Composite polishing pad for semiconductor process
US5527215A (en) * 1992-01-10 1996-06-18 Schlegel Corporation Foam buffing pad having a finishing surface with a splash reducing configuration
US5437754A (en) * 1992-01-13 1995-08-01 Minnesota Mining And Manufacturing Company Abrasive article having precise lateral spacing between abrasive composite members
AU666832B2 (en) * 1992-01-13 1996-02-22 Minnesota Mining And Manufacturing Company Abrasive article having precise lateral spacing between abrasive composite members
EP0554668A1 (fr) * 1992-01-13 1993-08-11 Minnesota Mining And Manufacturing Company Article abrasif ayant un espacement latéral précis entre les éléments abrasifs composites
US6439979B1 (en) * 1992-02-12 2002-08-27 Tokyo Electron Limited Polishing apparatus and polishing method using the same
US5551960A (en) * 1993-03-12 1996-09-03 Minnesota Mining And Manufacturing Company Article for polishing stone
US6142860A (en) * 1993-08-18 2000-11-07 Hiroshi Hashimoto Grinding tool
GB2281075A (en) * 1993-08-18 1995-02-22 Hiroshi Hashimoto Grinding tool having abrasive protruberances on the surface thereof
GB2281075B (en) * 1993-08-18 1998-04-01 Hiroshi Hashimoto Grinding tool
US6081959A (en) * 1996-07-01 2000-07-04 Umbrell; Richard Buffer centering system
US5913713A (en) * 1997-07-31 1999-06-22 International Business Machines Corporation CMP polishing pad backside modifications for advantageous polishing results
US6105197A (en) * 1998-04-14 2000-08-22 Umbrell; Richard T. Centering system for buffing pad
US6298518B1 (en) 1998-04-14 2001-10-09 Richard T. Umbrell Heat dissipating buffing pad
US6473266B1 (en) 2000-08-31 2002-10-29 Imation Corp. Magnetic recording diskette having reduced-area fabric liner
EP1979132B1 (fr) 2006-02-04 2017-01-25 Carl Freudenberg KG Element de recurage
CN101421077B (zh) * 2006-04-14 2012-06-13 3M创新有限公司 片状磨料制品以及砂磨工具组件
WO2012003116A1 (fr) * 2010-07-02 2012-01-05 3M Innovative Properties Company Articles abrasifs revêtus
US10245704B2 (en) 2010-07-02 2019-04-02 3M Innovative Properties Company Coated abrasive articles
US9630297B2 (en) 2011-12-29 2017-04-25 3M Innovative Properties Company Coated abrasive article and method of making the same

Also Published As

Publication number Publication date
EP0004454A3 (fr) 1979-10-31
JPS54133691A (en) 1979-10-17
BR7901769A (pt) 1979-11-20

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