EP0706859A1 - Matériaux abrasifs - Google Patents

Matériaux abrasifs Download PDF

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Publication number
EP0706859A1
EP0706859A1 EP95306891A EP95306891A EP0706859A1 EP 0706859 A1 EP0706859 A1 EP 0706859A1 EP 95306891 A EP95306891 A EP 95306891A EP 95306891 A EP95306891 A EP 95306891A EP 0706859 A1 EP0706859 A1 EP 0706859A1
Authority
EP
European Patent Office
Prior art keywords
direct
coated
abrasive
sponge
abrasive material
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.)
Granted
Application number
EP95306891A
Other languages
German (de)
English (en)
Other versions
EP0706859B1 (fr
Inventor
Roy c/o Minnesota Mining and Manuf. Co. Stubbs
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
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0706859A1 publication Critical patent/EP0706859A1/fr
Application granted granted Critical
Publication of EP0706859B1 publication Critical patent/EP0706859B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/04—Hand tools or other devices for non-rotary grinding, polishing, or stropping resilient; with resiliently-mounted operative surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material

Definitions

  • This invention relates to abrasive materials and in particular to direct-coated sponge abrasive materials.
  • Direct-coated sponge abrasives are materials in which abrasive mineral is coated on the surface of a resilient, cellular (sponge) material, such as foamed plastic, together with the relevant adhesives and binders. Although one or more resin layers may be coated on the foam prior to coating the abrasive, it is the foam itself which provides the overall structural integrity of the finished article, and largely determines its bulk physical properties such as tensile strength.
  • “Laminated sponge” abrasives are materials in which a conventional substrate, such as paper, cloth etc. is coated on one side with abrasive grains and laminated by the other side to a sponge backing.
  • a conventional substrate such as paper, cloth etc.
  • Such laminated sponge abrasive materials are disclosed in DE 3903204, US 4263755 and EP 0578865, and exemplified by the product sold under the tradename "SIASOFT” by SIA.
  • the presence of the sponge layer confers useful properties such as resilience and insulation, the overall properties are determined to a significant extent by the substrate on which the abrasive is actually coated.
  • Direct-coated sponge abrasives show several advantages over their laminated sponge counterparts, including reduced raw material costs and an improved performance in terms of the smoothness of finish for a given rate of cut.
  • Direct-coating of abrasive on to sponge materials is disclosed in various patents, e.g. US Patent Nos. 4966609, 4629473, 4038047 and 3607159, and UK Patents Nos. 1597455 and 1472087.
  • Commercially available direct-coated sponge abrasive products are sold by 3M under the product numbers 03808, 03809 and 03810.
  • Such direct-coated sponge abrasives are generally intended for hand sanding where they are grasped by the user and rubbed against the workpiece with a suitable application of pressure.
  • the user's hand and arm must supply a gripping action, a pressing action and a push-pull action, with the gripping action in particular potentially imposing strain and fatigue on the muscles and joints of the fingers when sanding is carried out over extended periods of time.
  • US 4966609 discloses the use of a textile reinforcement (which may be any knit, woven or non-woven fabric) to provide increased strength and restrict extensibility.
  • US 4629473, 4038047 and 3607159 all disclose direct-coated sponge abrasive laminated to a backing member.
  • the backing members include cloth, paper, plastic film etc, and the backing member apparently contributes most of the mechanical strength of the finished article.
  • GB 1472087 discloses a foam pad having a coating of abrasive on one side and a coating of adhesive on the reverse. The adhesive enables the pad to be fixed to a suitable surface so that surgical tools or other implements may be cleaned by rubbing against the abrasive coating.
  • Hook and loop attachment systems are known and have been used for the attachment of abrasive articles to back-up pads, including the attachment of laminated sponge abrasive articles, as disclosed in EP 0578865 and DE 3903204. Hook and loop systems have also been used for the attachment on non-abrasive-coated foam buffing pads, as disclosed in US 5123139 and US 4962562.
  • US 4263755 discloses a laminated sponge abrasive article in which the sponge layer itself functions as part of a hook and loop attachment system. This places severe restrictions on the type of sponge material that can be used, as only very open-textured materials give adequate engagement with the hooks or other protuberances on the back-up pad. Such materials do not function well as the self-supporting backing for a coated abrasive layer.
  • the present invention provides direct-coated sponge abrasive materials adapted for being releasably secured to a hand strap, back-up pad, etc.
  • a direct-coated sponge abrasive material bearing a releasable securing means comprising one part of a hook and loop attachment system.
  • the invention provides direct-coated sponge abrasive materials which may be used in combination with a strap, back-up pad, block, handle etc bearing the other half of the hook and loop attachment system.
  • the resulting products retain the outstanding performance of direct-coated abrasive sponges and possess one or more of the advantages of convenience, simplicity to use and reduction in strain and fatigue during hand sanding.
  • the invention allows the sponge abrasive material to be secured flat against the user's palm so that the gripping action is largely eliminated thereby reducing strain on the hand.
  • a layer of looped material is secured to the sponge surface, and enables temporary attachment to a layer of hooked material which forms part of a handle, hand strap, back-up pad etc.
  • a layer of hooked material is secured to the sponge surface to enable attachment to a layer of looped material which forms part of a handle, hand-strap, back-up pad etc.
  • Looped materials suitable for use in the invention include brushed nylon, such as the material sold under the trade name "Vell Strapp Resinato” by Sitip SpA of Italy, and other commercially available materials such as those supplied under the trade names "Kanebo 2A3", “Kanebo 2K3", “Velcro” etc.
  • Hooked materials suitable for use in the invention have a multiplicity of hook-shaped or burr-like protuberances capable of engaging the loops of the looped material, and are available commercially under the tradenames "Velcro”, “Kanebo”, etc.
  • the looped material or hooked material may be secured to the sponge surface by any conventional means, such as flame lamination or adhesive, especially a hot melt adhesive.
  • Suitable hot melt adhesives include “Sharnet 4200", available from Sharnet Corp., Ward Hill, Mass.
  • a pressure-sensitive adhesive may be used.
  • Abrasive articles in accordance with the invention comprise a sponge substrate bearing on at least one surface thereof a coating of abrasive particles and on at least one other surface thereof a layer of hooked or looped material.
  • the layer of hooked or looped material may extend over the entire area of the surface(s) to which it is secured, or may extend over only part of said surface(s).
  • the substrate may comprise any sponge material suitable for use as an abrasive backing, including both open-cell and closed-cell materials, such as those disclosed in US Patents Nos. 4966609, 4629473, 4038047 and 3607159 and UK Patents Nos. 1597455 and 1472087.
  • Abrasive particles are coated on at least one surface of the substrate by any conventional method, such as the methods disclosed in the aforementioned US and UK patents, but a particularly suitable method employs a moisture-curable hot melt adhesive as the make adhesive, as disclosed in UK Patent Appln. No. 9316715.3
  • the substrate comprises a sheet of open-cell polyester-urethane foam of density 50 to 100 kg/m3 and thickness 2 to 15 mm coated with abrasive particles on one major surface, the other major surface being bonded to a layer of hooked or looped material, which preferably extends over the entire area of said other major surface.
  • the abrasive materials may be releasably attached to the back-up pad of a machine sander where said back-up pad is equipped with the complementary half of the hook and loop attachment system. This enables the outstanding performance of direct-coated sponge abrasives to be realised in machine sanding operations such as rotary or random orbital sanding.
  • the back-up pads and abrasive materials may have any desired shape e.g. circular, rectangular etc.
  • abrasive materials of the invention in the form of an elongate strip, may also be used to form an abrasive belt by attachment to a backing belt bearing the appropriate part of the hook and loop attachment system.
  • Abrasive materials in accordance with this embodiment of the invention are equally suited to hand sanding applications. For example, they may be releasably attached to a block or hand pad having an attachment surface equipped with the appropriate part of the hook and loop attachment system.
  • the block or hand pad may be made of any of the conventional materials (wood, plastic, rubber etc.) an is preferably moulded or otherwise shaped so as to be grasped comfortably by the user, and/or is equipped with a strap with which to secure it to the user's hand.
  • the invention enables a hand-securing strap to be attached directly to the abrasive material.
  • the strap comprises an elongate strip of material e.g. about 50mm wide and about 200mm long having on at least the end portions of one of its surfaces the part of a hook and loop attachment system that is complementary to that present on the abrasive material of the invention.
  • the strap may comprise any suitable material such as rubber, plastic film or textiles (woven or nonwoven). Elasticated or otherwise resilient materials may be used advantageously.
  • At least the end portions of one of the surfaces of the strip are equipped with one half of the hook and loop attachment system.
  • an area of at least 500 mm2 (more preferably at least 1000 mm2) at each end is so equipped.
  • the entire surface may be so equipped.
  • Figures 1 and 2 of the accompanying drawings Two possible modes of attaching the ends are shown in Figures 1 and 2 of the accompanying drawings which represent diagrammatic cross-sections through the abrasive material and strap.
  • the strap secures the abrasive material firmly to the user's hand and thus obviates the need for any gripping action on the part of the user during the sanding operation, which greatly reduces the fatigue suffered.
  • the strap can, of course, be detached and repositioned at will to accommodate the different needs of different users.
  • the abrasive material (2) comprises a sponge sheet (3) having a direct coated abrasive layer (4) and one part of a hook and loop fastening system (6).
  • a strap (8) has ends (10,12) bearing complementary portions (14,16) of the fastening system to allow the ends (10,12) to be secured to the abrasive material.
  • Figures 1 and 2 readily allow the strap (8) to be adjusted to the dimensions of the user's hand.
  • the embodiment of Figure 1 is preferred since the pressure of the user's hand assists in closing the fastening system.
  • the abrasive material comprises a foam block (e.g. of about 25mm thickness and square or rectangular in shape) having one pair of parallel opposed major surfaces, and two pairs of parallel opposed minor surfaces. At least one, but preferably both, of the major surfaces are coated with abrasive particles, and preferably one pair of parallel opposed minor surfaces are also coated with abrasive particles. Different grades of abrasive particles may be coated on different surfaces. Such abrasive materials are known, and are disclosed, for example, in UK Patent No. 1328292.
  • two parallel opposed minor surfaces not having a coating of abrasive particles are each equipped with one part of a hook and loop attachment system. This enables the temporary attachment of a hand strap of the type described above, which may be used to secure the sanding block to the user's hand and hence reduce or eliminate the gripping action required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP19950306891 1994-10-11 1995-09-29 Matériaux abrasifs Expired - Lifetime EP0706859B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9420509A GB9420509D0 (en) 1994-10-11 1994-10-11 Abrasive materials
GB9420509 1994-10-11

Publications (2)

Publication Number Publication Date
EP0706859A1 true EP0706859A1 (fr) 1996-04-17
EP0706859B1 EP0706859B1 (fr) 2002-08-28

Family

ID=10762691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950306891 Expired - Lifetime EP0706859B1 (fr) 1994-10-11 1995-09-29 Matériaux abrasifs

Country Status (4)

Country Link
EP (1) EP0706859B1 (fr)
JP (1) JPH08174435A (fr)
DE (1) DE69527909T2 (fr)
GB (1) GB9420509D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006065411A1 (fr) * 2004-12-16 2006-06-22 3M Innovative Properties Company Article de ponçage structure, souple
EP1973702A4 (fr) * 2005-12-28 2009-12-23 3M Innovative Properties Co Article abrasif resilient

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100763314B1 (ko) * 2006-06-14 2007-10-04 주식회사 썬텍인더스트리 벨크로 직물층을 함유하는 연마 디스크 및 이의 제조방법

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1411309A (fr) * 1964-02-17 1965-09-17 American Felt Co Tampons de feutre utilisés en combinaison avec des moyens de fixation montés sur les têtes de polissage de machines à polir le verre ou autre
US3607159A (en) 1967-05-12 1971-09-21 Norton Co Saturated, resilient, flexible and porous abrasive laminate
GB1328292A (en) 1972-03-22 1973-08-30 Brogden T H N Abrasive devices
GB1472087A (en) 1973-09-24 1977-04-27 Ethicon Inc Electrosurgical tip cleaner
US4038047A (en) 1969-04-14 1977-07-26 Norton Company Method of making a flexible resilient abrasive
US4202139A (en) * 1978-04-06 1980-05-13 Minnesota Mining And Manufacturing Company Conformable hand sanding pad
US4263755A (en) 1979-10-12 1981-04-28 Jack Globus Abrasive product
GB1597455A (en) 1978-03-09 1981-09-09 Flock Dev & Research Co Ltd Abrasive product
GB2113977A (en) 1982-01-28 1983-08-17 Rodney Boynton Smith Multi-purpose glove
CH650441A5 (en) * 1981-02-21 1985-07-31 Peter Joest Article for abrading purposes and work glove
WO1986001090A1 (fr) 1984-08-20 1986-02-27 Kato Products Corporation Gant frotteur impermeable a l'eau
US4629473A (en) 1985-06-26 1986-12-16 Norton Company Resilient abrasive polishing product
WO1987004061A1 (fr) 1986-01-14 1987-07-16 Juliana Mcleish Gant de nettoyage
DE3903204A1 (de) 1988-08-13 1990-02-15 Peter Joest Schleifkoerper mit temperatursperre
US4962562A (en) 1989-01-18 1990-10-16 Minnesota Mining And Manufacturing Company Compounding, glazing or polishing pad
US4966609A (en) 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article
US5123139A (en) 1991-01-16 1992-06-23 Meguiar's, Inc. Buffing pad assembly
US5220752A (en) * 1991-07-22 1993-06-22 Christopher Cheney Conformable sanding device incorporating a flexible attachment means
US5222331A (en) 1990-04-10 1993-06-29 Minnesota Mining And Manufacturing Company Abrading assembly
EP0578865A1 (fr) 1992-07-09 1994-01-19 Norton Company Outil abrasif
DE9407622U1 (de) * 1994-05-06 1994-08-04 Jöst, Peter, 69518 Abtsteinach Schleifkörper mit einer Kontaktfläche zur Adaption mit einem Werkzeug

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1411309A (fr) * 1964-02-17 1965-09-17 American Felt Co Tampons de feutre utilisés en combinaison avec des moyens de fixation montés sur les têtes de polissage de machines à polir le verre ou autre
US3607159A (en) 1967-05-12 1971-09-21 Norton Co Saturated, resilient, flexible and porous abrasive laminate
US4038047A (en) 1969-04-14 1977-07-26 Norton Company Method of making a flexible resilient abrasive
GB1328292A (en) 1972-03-22 1973-08-30 Brogden T H N Abrasive devices
GB1472087A (en) 1973-09-24 1977-04-27 Ethicon Inc Electrosurgical tip cleaner
GB1597455A (en) 1978-03-09 1981-09-09 Flock Dev & Research Co Ltd Abrasive product
US4202139A (en) * 1978-04-06 1980-05-13 Minnesota Mining And Manufacturing Company Conformable hand sanding pad
US4263755A (en) 1979-10-12 1981-04-28 Jack Globus Abrasive product
CH650441A5 (en) * 1981-02-21 1985-07-31 Peter Joest Article for abrading purposes and work glove
GB2113977A (en) 1982-01-28 1983-08-17 Rodney Boynton Smith Multi-purpose glove
WO1986001090A1 (fr) 1984-08-20 1986-02-27 Kato Products Corporation Gant frotteur impermeable a l'eau
US4629473A (en) 1985-06-26 1986-12-16 Norton Company Resilient abrasive polishing product
WO1987004061A1 (fr) 1986-01-14 1987-07-16 Juliana Mcleish Gant de nettoyage
DE3903204A1 (de) 1988-08-13 1990-02-15 Peter Joest Schleifkoerper mit temperatursperre
US4962562A (en) 1989-01-18 1990-10-16 Minnesota Mining And Manufacturing Company Compounding, glazing or polishing pad
US4966609A (en) 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article
US5222331A (en) 1990-04-10 1993-06-29 Minnesota Mining And Manufacturing Company Abrading assembly
US5123139A (en) 1991-01-16 1992-06-23 Meguiar's, Inc. Buffing pad assembly
US5220752A (en) * 1991-07-22 1993-06-22 Christopher Cheney Conformable sanding device incorporating a flexible attachment means
EP0578865A1 (fr) 1992-07-09 1994-01-19 Norton Company Outil abrasif
DE9407622U1 (de) * 1994-05-06 1994-08-04 Jöst, Peter, 69518 Abtsteinach Schleifkörper mit einer Kontaktfläche zur Adaption mit einem Werkzeug

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006065411A1 (fr) * 2004-12-16 2006-06-22 3M Innovative Properties Company Article de ponçage structure, souple
US7169029B2 (en) 2004-12-16 2007-01-30 3M Innovative Properties Company Resilient structured sanding article
EP1973702A4 (fr) * 2005-12-28 2009-12-23 3M Innovative Properties Co Article abrasif resilient

Also Published As

Publication number Publication date
GB9420509D0 (en) 1994-11-23
DE69527909D1 (de) 2002-10-02
JPH08174435A (ja) 1996-07-09
DE69527909T2 (de) 2003-05-28
EP0706859B1 (fr) 2002-08-28

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