EP4178763A1 - Kratzfreier schleifverbundstoff - Google Patents

Kratzfreier schleifverbundstoff

Info

Publication number
EP4178763A1
EP4178763A1 EP21740221.3A EP21740221A EP4178763A1 EP 4178763 A1 EP4178763 A1 EP 4178763A1 EP 21740221 A EP21740221 A EP 21740221A EP 4178763 A1 EP4178763 A1 EP 4178763A1
Authority
EP
European Patent Office
Prior art keywords
abrasive
abrasive composite
structured
article
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.)
Pending
Application number
EP21740221.3A
Other languages
English (en)
French (fr)
Inventor
Kyle C. Bryson
Mario A. Davenport
Matthew D. Chaffee
Paul N. Daveloose
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 Innovative Properties Co
Original Assignee
3M Innovative Properties 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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Publication of EP4178763A1 publication Critical patent/EP4178763A1/de
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B24D3/20—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 organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • 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
    • B24D11/06—Connecting the ends of materials, e.g. for making abrasive belts
    • 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
    • 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

Definitions

  • abrasive performance posits that workpiece material removal rate is related to the abrasive material’s mechanical properties (i.e., hardness), size, and shape (i.e., sharpness).
  • mechanical properties i.e., hardness
  • size i.e., size
  • shape i.e., sharpness
  • the likelihood of an abrasive material producing scratches on a workpiece is generally discussed in terms of the relative hardness of the abrasive material and the workpiece.
  • size and shape certainly affect whether an abrasive will scratch and how noticeable the scratches are, actually forming a scratch requires the deformation of the workpiece by the abrasive material. For this to occur, the abrasive material must be stiffer than the workpiece.
  • the abrasive material is not so hard as to deform the workpiece, soils located on the surface of the workpiece having a lower hardness than the workpiece itself can be effectively cleaned by an abrasive material boasting sizes and shapes amenable to high soil removal rates, namely relatively tall protrusions with relatively sharp edges, for example, square pyramid-shaped abrasive protrusions having heights of about 500 microns and base widths between 500-1200 microns, wherein formed edges have radii of curvature generally less than 50 microns.
  • FIG. 1 shows a perspective view of a first embodiment of a cleaning article of the present invention.
  • FIG. 2 shows a perspective view of a second embodiment of a cleaning article of the present invention.
  • FIG. 3 shows a perspective view of a third embodiment of a cleaning article of the present invention.
  • the present invention is an abrasive composite including a first crosslinkable binder component wherein when polymerized, has a glass transition temperature (T g ) below room temperature and a modulus of less than about 150 MPa; a second crosslinkable binder component having a T g above room temperature; a component capable of initiating addition polymerization; and particulate grains having a Mohs hardness value of less than or equal to about 3.
  • the present invention is a structured abrasive article including a substrate and an abrasive composite adhered to the substrate.
  • the abrasive composite includes a first crosslinkable binder component wherein when polymerized, has a glass transition temperature (T g ) below room temperature and a modulus of less than about 150 MPa; a second crosslinkable binder component having a T g above room temperature; a component capable of initiating addition polymerization; and particulate grains having a Mohs hardness value of less than or equal to about 3.
  • the present invention is an abrasive composite that can be used for cleaning or scouring that is substantially non-scratch and is able to be substantially rinsed clean of soils that accumulate on the surface of the abrasive composite during use.
  • the abrasive composite is designed to have high scouring performance without appreciable damage to the underlying substrate being cleaned.
  • the abrasive composite can be used for home cleaning that entails substantially no or minimal damage to materials such as, for example, poly(tetrafluoroethylene), stainless steel, and hard plastics. After being used to clean, the abrasive composite can be essentially rinsed clean of debris removed from the surfaces being cleaned.
  • the abrasive composite of the present invention is durable and wears well.
  • the abrasive composite of the present invention is formed from dispersing a mineral or particulate grain phase in an organic binder phase.
  • relatively particulate grains are bound together by a binder that serves as a dispersing medium for the particulate grains and provides the means of attachment of the abrasive composites to a substrate or backing if desired.
  • particulate grains primarily act as a filler and viscosity modifier in the uncured liquid precursor, in contrast to traditional coated or nonwoven abrasives, whose particulate grains generally have high values of Mohs hardness and are capable of removing significant material from a workpiece by gouging in a manner dependent on the particle grain’s shape, hardness, and size and the pressure and geometry of the abrading operation.
  • gouges are framed as “scratches”, and while individual particulate grains with a low value of Mohs hardness may not produce a visible scratch in a test surface, the minerals can affect the scratching by modifying the mechanical properties of the composite in accordance with general mixing rules for composites.
  • the abrasive composites of the present invention contain particulate grains having a Mohs hardness of less than or equal to about 3.
  • the particulate grain phase includes an inorganic mineral having a ds>o of less than about 50 micron, and particularly less than about 30 micron, and a Mohs hardness value of less than or equal to about 3. Increases in the particle size distribution increases the probability of scratching and decreases control over the rheological properties of the liquid slurry prior to curing.
  • particulate grains having a Mohs hardness of less than 3 include, but are not limited to: clays (such as kaolinite, montmorillonite, illite, chlorite clays, talc, soapstone), gypsum, calcium carbonate (such as limestone and marble), mica, halite, and jet.
  • clays such as kaolinite, montmorillonite, illite, chlorite clays, talc, soapstone
  • gypsum calcium carbonate (such as limestone and marble), mica, halite, and jet.
  • crushed or ground shells of nuts/fruits including, but not limited to: almond, argan, coconut, hazelnut, macadamia, pecan, pine, pistachio, and walnut; crushed or ground pits/kemels of fruits including but not limited to: apricot, olive, peach, cherry, plum, palm, and tagua; crushed or ground com cob; crushed or ground shells of arthropods; wood flour; crushed or ground synthetic polymeric materials including but not limited to any thermoplastic polymer or any thermoset polymer; and crushed, ground, or unmodified naturally-derived polymeric materials including, but not limited to: polyhydroxyalkanoates; precision-shaped synthetic polymeric materials.
  • the abrasive composite includes more than one type of particulate grain.
  • the abrasive composite includes between about 26% and about 80%, particularly between about 47% and about 65%, and more particularly between about 52% and about 61% by weight particulate grains.
  • the binder of the abrasive composite must be capable of providing a medium in which the particulate grains can be distributed.
  • the binder generally includes a soft crosslinkable binder component, a hard crosslinkable binder component, and a material that is capable of initiating addition polymerization.
  • the soft crosslinkable binder component when polymerized, has a glass transition temperature (T g ) below room temperature (thereby being rubbery and capable of deformation) and a modulus of less than about 150 MPa.
  • T g glass transition temperature
  • the soft crosslinkable binder component includes a urethane diacrylate or triacrylate.
  • An example of a suitable soft crosslinkable binder component includes, but is not limited to, an aliphatic urethane diacrylate.
  • the soft crosslinkable binder component when polymerized, has an elongation % at break of greater than about 25%.
  • the hard crosslinkable binder component has a T g above room temperature (thereby being glassy and stiff).
  • the hard crosslinkable binder component includes a difunctional or trifunctional acrylate.
  • An example of a suitable hard crosslinkable binder components includes, but is not limited to, trimethylolpropane triacrylate.
  • the material capable of initiating addition polymerization is a UV photoinitiator.
  • the binder is capable of being cured or gelled relatively quickly so that the abrasive composite can be quickly fabricated.
  • Some binders gel relatively quickly, but require a longer time to fully cure. Gelling preserves the shape of the composite until curing commences. Fast curing or fast gelling binders can result in coated abrasive articles having abrasive composites of high consistency.
  • binders suitable for the present invention include, but are not limited to: thermoplastic resins, phenolic resins, aminoplast resins, urethane resins, epoxy resins, acrylate resins, acrylated isocyanurate resins, urea formaldehyde resins, isocyanurate resins, acrylated urethane resins, acrylated epoxy resins, hot melt glue, and mixtures thereof.
  • the curing or gelling can be carried out by an energy source as known by one of skill in the art.
  • the energy source may include, but is not limited to: heat, infrared irradiation, electron beam, ultraviolet radiation, or visible radiation.
  • a radiation-curable binder is any binder that can be at least partially cured or at least partially polymerized by radiation energy. Typically, these binders polymerize via a free radical mechanism.
  • photoinitiators include, but are not limited to: organic peroxides, azo compounds, quinones, benzophenones, nitroso compounds, acryl halides, hydrazones, mercapto compounds, pyrylium compounds, triacrylimidazoles, bisimidazoles, chloralkyltriazines, benzil ketals, thioxanthones, and acetophenone derivatives.
  • benzoin and its derivatives such as alpha-methylbenzoin; alpha-phenylbenzoin; alpha-allylbenzoin; alpha- benzylbenzoin; benzoin ethers such as benzil dimethyl ketal (e.g., as commercially available as IRGACURE 651 from Ciba Specialty Chemicals, Tarrytown, N.Y.), benzoin methyl ether, benzoin ethyl ether, benzoin n-butyl ether; acetophenone and its derivatives such as 2-hydroxy-2-methyl- 1-phenyl-l- propanone (e.g., as DAROCUR 1173 from Ciba Specialty Chemicals) and 1 -hydroxy cyclohexyl phenyl ketone (e.g., as IRGACURE 184 from Ciba Specialty Chemicals); 2-methyl- l-[4-(methylthio)phenyl] -2-(4-(4-(methylthio)
  • phosphorus-containing organic molecules such as bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide (e.g. IRGACURE 819 from Ciba Specialty Chemicals) and ethyl (2,4,6-trimethylbenzoyl) phenyl phosphinate (e.g. TPO-L from Ciba Specialty Chemicals).
  • Still more useful photoinitiators include, for example, pivaloin ethyl ether, anisoin ethyl ether, anthraquinones (e.g., anthraquinone, 2-ethylanthraquinone, 1-chloroanthraquinone, 1,4-dimethylanthraquinone, 1-methoxyanthraquinone, or benzanthraquinone), halomethyltriazines, benzophenone and its derivatives, iodonium salts and sulfonium salts, titanium complexes such as bis(eta5- 2,4-cyclopentadien-l-yl)-bis[2,6-difluoro-3(l H-pyrrol-l-yl)phenyl]titanium (e.g., as CGI 784DC from Ciba Specialty Chemicals); and halonitrobenzenes (e.g., 4- bromo
  • more than one photoinitiator is used.
  • One or more spectral sensitizers e.g., dyes
  • the abrasive composite includes between about 15 and about 35%, particularly between about 22 and about 28%, and more particularly between about 24 and about 27% by weight soft crosslinkable binder component. In one embodiment, the abrasive composite includes between about 8 and about 28%, particularly between about 10 and about 15%, and more particularly between about 11 and about 14% by weight hard crosslinkable binder component. In one embodiment, the abrasive composite includes between about 0.5 and about 5%, particularly between about 0.6 and about 1%, and more particularly between about 0.7 and about 0.9% by weight material capable of initiating addition polymerization.
  • the binder may be radiation-curable through an addition polymerization mechanism.
  • a silane coupling agent may be included in the slurry of particulate grains and binder precursor.
  • the silane coupling agent may be present in an amount of between about 0 and about 1%, particularly between about 0.05 and about 0.4% by weight, and more particularly between about 0.1 and about 0.3% by weight.
  • the silane coupling agent may be present in an amount of between about 0 and about 1%, particularly between about 0.05 and about 0.4% by weight, and more particularly between about 0.1 and about 0.3% by weight.
  • other amounts may also be used, depending, for example, on the size of the minerals.
  • Suitable silane coupling agents include, for example, methacryloxypropylsilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, 3,4- epoxycyclohexylmethyltrimethoxysilane, gammaglycidoxypropyl-trimethoxysilane, and gamma-mercaptopropyltrimethoxysilane (e.g., as available under the respective trade designations A- 174, A- 151, A-172, A-186, A-187, and A-189 from Witco Corp.
  • abrasive composite for special purposes including, but not limited to: monofunctional acrylic monomers, thermal free radical initiators, accelerators, polymer waxes or beads, leveling agents, wetting agents, matting agents, colorants, dyes, pigments, slip agents, adhesion promoters, fdlers, rheology modifiers, thixotropic agents, plasticizers, UV absorbers, UV stabilizing agents, dispersants, antioxidants, antistatic agents, lubricants, opacifying agents, anti-foam agents, antimicrobial agents, fungicides, and combinations thereof.
  • the additives are organic.
  • the abrasive composite includes up to about 1%, particularly between about 0.1 and about 0.8%, and more particularly between about 0.2 and about 0.6% by weight dispersant. In one embodiment, the abrasive composite includes up to about 1%, particularly between about 0.05 and about 0.4%, and more particularly between about 0.1 and about 0.3% by weight coupling agent. In one embodiment, the abrasive composite includes up to about 1%, particularly up to about 0.3%, and more particularly up to about 0.2% by weight colorant.
  • the abrasive composite includes between about 15 and about 35% by weight, particularly between about 22 and about 28% by weight, and more particularly about 26.8% by weight soft crosslinkable binder component; between about 8 and about 28%, particularly between about 22 and about 15%, and more particularly about 12.6% by weight hard crosslinkable binder component; between about 0.5 and about 5%, particularly between about 0.6 and about 1%, and more particularly about 0.8% by weight photoinitiator; between about 25 and about 55%, particularly between about 35 and about 45%; and more particularly about 42.1% by weight of a first particulate grain; and between about 1 and about 25%, particularly between about 12 and about 20%, and more particularly about 16.9% by weight of a second particulate grain.
  • the abrasive composite includes a binder phase and a mineral phase
  • the mineral phase does not contribute to the scouring ability of the abrasive composite and functions more as a filler. Rather, the scouring performance arises from the properties of the binder phase and the mineral phase as a whole.
  • the abrasive composites are used to form a structured abrasive article including a plurality of precisely shaped abrasive composites attached to a substrate.
  • “Precisely shaped abrasive composite”, as used herein, refers to abrasive composites having a shape that has been formed by curing one or more binder components of a flowable mixture also containing soft mineral grains while the mixture is both being borne on a backing and filling a cavity on the surface of a production tool.
  • Such precisely shaped abrasive composites have precisely the same shape as that of the cavity.
  • the abrasive composites can be pyramidal, the dimensions of which are substantially precise.
  • the plurality of precisely shaped abrasive composites is attached to at least one major surface of a substrate.
  • the precisely shaped abrasive composites provide three-dimensional shapes that project outward from the surface of the substrate.
  • the abrasive composites can be disposed on the substrate in either a pattern (i.e., non-random array) or a random array. In one embodiment, the abrasive composites are disposed on the substrate in a non-random array that exhibits some degree of repetitiveness.
  • the substrate is a polymeric film, such as polyester or polyurethane film.
  • the substrate is transparent to ultraviolet radiation.
  • the substrate is coated with an adhesion-promoting layer, such as poly(ethylene-co-acrylic acid) or a UV-curable “tie coat” layer, or undergo adhesion-promoting surface modification, such as corona or flame treatment or electron beam irradiation.
  • the substrate can be laminated to another substrate after the coated abrasive article is formed.
  • the substrate can be laminated to a flexible or stiff polyurethane foam material, providing a means for effective manipulation of the abrasive by the user.
  • Production tools may be used to form abrasive articles having precisely shaped abrasive coatings or to produce precisely shaped abrasive composites.
  • a production tool has a surface defining a main plane, which contains a plurality of cavities distending as indentations from the main plane. These cavities define the inverse shape of the abrasive composite and are responsible for generating the shape, size, and placement of the abrasive composites.
  • the cavities can be provided in essentially any geometric shape that is the inverse of a geometric shape which is suitable for an abrasive composite or abrasive composite particle.
  • the abrasive composites may be cubic, cylindrical, prismatic, hemispheric, rectangular, pyramidal, truncated pyramidal, conical, truncated conical, and post-like with a flat top surface.
  • the dimensions of the cavities are selected to achieve the desired areal density of abrasive composites.
  • the cavities can be present in a dot like pattern where adjacent cavities butt up against one another.
  • the shape of the cavities is selected such that the surface area of the abrasive composite decreases away from the backing.
  • the production tool can take the form of a belt, sheet, continuous sheet or web, coating roll such as a rotogravure roll, sleeve mounted on a coating roll, or die.
  • the production tool is replicated from a master tool.
  • the master tool can be fabricated by any conventional technique known to those of skill in the art, including but not limited to: photolithography, knurling, engraving, hobbing, electroforming, and diamond turning.
  • U.S. Patent No. 5,851,247 (Stoetzel et al.) describes a production tool made of thermoplastic material that can be replicated from a master tool, and is hereby incorporated by reference.
  • the master tool When a production tool is replicated from a master tool, the master tool is provided with the inverse of the pattern which is desired for the production tool.
  • the master tool is made of a nickel-plated metal, such as nickel- plated aluminum, nickel-plated copper, or nickel-plated bronze.
  • a production tool can be replicated from a master tool by pressing a sheet of thermoplastic material against the master tool while heating the master tool and/or the thermoplastic sheet such that the thermoplastic material is embossed with the master tool pattern.
  • the thermoplastic material can be extruded or cast directly onto the master tool. The thermoplastic material is then cooled to a solid state and is separated from the master tool to produce a production tool.
  • the production tool may optionally contain a release coating to permit easier release of the abrasive article.
  • suitable release coatings include, but are not limited to: silicones and fluorochemicals.
  • Preferred methods for the production of production tools are disclosed in U.S. Pat. Nos. 5,435,816 (Spurgeon et al.), 5,658,184 (Hoopman et al), and in U.S. Ser. No. 08/923, 862, “Method and Apparatus for Knurling a Workpiece, Method of Molding an Article with Such Workpiece, and Such Molded Article” (Hoopman), fded Sep. 3, 1997), the disclosures of which are incorporated herein by reference.
  • the structured abrasive article can be made by first introducing a flowable and curable slurry containing a mixture of a binder precursor and a plurality of minerals into cavities contained on an outer surface of a production tool to fill such cavities. A substrate is then introduced to the outer surface of the production tool over the filled cavities such that the slurry wets one major surface of the substrate to form an intermediate article. The binder is then cured before the intermediate article departs from the outer surface of the production tool to form a coated, structured abrasive article. The coated, structured abrasive article is then removed from the surface of the production tool.
  • the structured abrasive article can be made by first introducing a flowable and curable slurry containing a mixture of a binder precursor and plurality of minerals onto a front side of a substrate such that the slurry wets the front side of the substrate to form an intermediate article.
  • the slurry is then introduced to the bearing side of the intermediate article to an outer surface of a production tool having a plurality of cavities in its outer surface such that the cavities are filled.
  • the binder precursor is then cured before the intermediate article departs from the outer surface of the production tool to form a coated, structured abrasive article.
  • the coated, structured abrasive article is then removed from the surface of the production tool.
  • the steps are carried out in a continuous manner, providing an efficient method of making the structured abrasive article of the present invention.
  • the structured abrasive article is used as a cleaning article.
  • the cleaning article can take a variety of forms, including, but not limited to: a wipe construction, a hand pad, or a handled good.
  • the cleaning article includes the abrasive composite and the substrate.
  • the substrate may include a substantially thin and flexible material such as, but not limited to: a nonwoven, a woven, a foam, etc.
  • the structured abrasive article may be attached to a substrate, such as a conformable material including to allow a user to have a better grip on the cleaning article. Any material can be used that allows the structured abrasive article to conform around surfaces to be cleaned.
  • the substrate may include, but is not limited to, foam or soft polymer network including a rubber/elastomer or gel material. This allows the user to better manipulate the structured abrasive article for more effective cleaning.
  • the cleaning article would include the abrasive composite positioned adjacent a first side of the substrate and the second side of the substrate positioned adjacent the foam layer.
  • the foam layer may be attached to the substrate by any means known to those of skill in the art, including, but not limited to, mechanical or adhesive means.
  • the structured abrasive article may be attached to a grip or handle, as seen in FIG. 3.
  • the structured abrasive article may be permanently or releasably attached to the grip or handle by an attachment mechanism.
  • the grip or handle may be attached to the structured abrasive article by any means known to those of skill in the art.
  • Exemplary attachment methods include mechanical means or adhesive means.
  • One exemplary mechanical attachment mechanism includes using plastic snaps.
  • the structured abrasive article can be attached to the grip or handle by engagement of an insertable portion of the grip or handle into a shoe or cup attached to the structured abrasive article.
  • the shoe or cup may be attached to the structured abrasive article through adhesive or mechanical means.
  • the user inserts the insertable portion of the grip or handle into the cup or shoe of the structured abrasive article and pushes or exerts force to guide the grip or handle firmly into/onto the cup or shoe.
  • the user’s force causes the at least one snap in the insertable portion of the grip or handle to flex or push inwardly. This permits the insertable portion to slide into the cup or shoe.
  • the snaps align with corresponding slots on the cup or shoe, the snaps enter into the slots and return generally to their original non-flexed (relaxed) position. In this way, the snaps engage with the slots of the cup or shoe attached to the structured abrasive article. In this engaged position, the snaps attach the structured abrasive article to the grip or handle and holds the structured abrasive article in place.
  • an additional layer is positioned between the structured abrasive article and the handle or grip.
  • a layer of foam, soft polymer, or other conformable material may be positioned between the structured abrasive article and the grip or handle.
  • the foam layer may be attached to the structured abrasive article by any means known in the art, including, but not limited to, mechanical or adhesive means.
  • the grip or handle is then attached (permanently or releasably) to the foam layer.
  • the overall structure of the cleaning article includes the abrasive composite positioned adjacent to a first side of the substrate, a second side of the substrate positioned adjacent a first side of the foam layer, and a second side of the foam layer positioned adjacent and attached to the handle or grip.
  • the attachment mechanism includes an actuation button or switch on the grip or handle.
  • the actuation button When the actuation button is pushed, the structured abrasive article is ejected or released from attachment to the grip or handle.
  • the user can activate the activation mechanism by activating button or switch and can then insert the insertable portion of the grip or handle into the shoe or cup of the structured abrasive article.
  • the button or switch When the button or switch is activated, the snaps on the grip or handle flex or push inwardly. This enables the structured abrasive article to easily slide onto the grip or handle. Once the structured abrasive article is on the grip or handle, the user releases or slides the button or switch into its original position. This causes the snaps to engage with the slots on the shoe or cup and hold the structured abrasive article firmly in place on the grip or handle.
  • the user activates the button or switch. This generates enough force to push or flex the snaps inward and to release the snaps from the slots.
  • the snaps are capable of flexural motion such that they can flex inward, providing additional “give” to release the structured abrasive article from the grip or handle.
  • the snaps Once the snaps are pushed inward, the structured abrasive article slides off of the insertable portion. In this way, the structured abrasive article is easily detached from the grip or handle without requiring the user to touch the structured abrasive article.
  • the grip or handle may be made of any suitable material.
  • the grip or handle may be molded.
  • the grip or handle is made of a polymeric material such as acrylonitrile butadiene (ABS), polyethylene, polypropylene, polycarbonate, or high impact polystyrene.
  • ABS acrylonitrile butadiene
  • the handle may feature “overmolded” components designed to enhance the user’s grip on the tool.
  • Such components are generally made from urethane -based elastomers or hydrocarbon-based block copolymer elastomers like styrene-isoprene-styrene (SIS), styrene-butadiene-styrene (SBS), or styrene-ethylene-butylene-styrene (SEBS) materials.
  • SIS styrene-isoprene-styrene
  • SBS styrene-butadiene-styrene
  • SEBS styrene-ethylene-butylene-styrene
  • the article cleaning efficacy test was performed in a generally similar manner as that described in U.S. Patent No. 5,626,512 (Palaikis et al).
  • a 5 mm thick, 4 inch diameter stainless steel disc was coated with a food soil mixture made up of 120 grams milk, 60 grams cheddar cheese, 120 grams hamburger, 120 grams tomato juice, 120 grams cherry juice, 20 grams flour, and 100 granulated sugar, and one egg.
  • the coated panel was baked in an oven at 230°C for one hour. The above coating and curing process was repeated three times to achieve uniform coat on the panel.
  • Acceptable food soil coating weight should be at least equal to 0.9 grams.
  • Test samples measuring about 1 in 2 comprising precisely shaped abrasive composites affixed to polymeric film, were cut from a larger sample of each abrasive article.
  • the sample contacted the food soil disc by virtue of force transmitted through a 1 inch thick piece of foam by a single finger-like projection (having approximately 0.08 inch 2 contact area with the sample) having 5 pounds of weight on top of it.
  • the assembly comprising the weight, finger-like projection, foam, and abrasive sample were pushed/pulled by hand, using a track as guide over the coated panel until the abraded region of the coated panel was clean (no coated material visually remained on the panel).
  • the travel length was 2 inches.
  • the number of cycles (back and forth equals one cycle with a rate of approximately 45 cycles per minute) required to result in a clean panel was recorded.
  • Test samples comprising precisely shaped abrasive composites affixed to polymeric film, measuring about 3 cm 2 were cut from a larger sample of each abrasive article.
  • the test samples were pushed with the side of the tester’s thumb into the test surface, exerting about five pounds of force, and pushed and pulled back and forth over the surface for five seconds. Then, the surfaces were visually examined for changes in surface finish.
  • the poly(tetrafluoroethylene) (PTFE) surface tested was that of a nonstick frying pan, and the chrome surface was that of a drip pan for an electric coil cooking range.
  • Liquid components AUDA, TMPTA, PI, DISP, and CA were added to a SPEEDMIXER cup and mixed at 2400 rpm for 60 seconds in a DAC 400.2 VAC-P
  • Coated abrasive articles were prepared using a method similar to those described in U.S. Pat. No. 5,152,917 (Pieper et al) (for example, see Examples 1-5) and U.S. Pat. No. 7,267,700 (Collins et al) (for example, see Column 11, lines 9-34).
  • a production tool was provided having an outer surface that had a plurality of cavities that corresponded to the inverse shape of the desired abrasive composite shape.
  • the cavities each had a shape resembling that of a pyramid with a base length of 400-700 microns and a height of 450 microns.
  • Example EX1-X7 For each of the Example EX1-X7 formulas, a liquid slurry of the binder precursor and plurality of soft mineral grains was coated into the cavities of the production tool. A backing was then introduced to the outer surface of the production tool over the filled cavities such that the slurry wetted one major surface of the backing to form an intermediate article.
  • the backing was a polyester film (3mil thick) with a corona-treated poly(ethylene-co-acrylic acid) primer layer (0.81 mil thick) to prime the film.
  • the production tool containing the slurry and the soft mineral grains was exposed to UV radiation to cure the binder precursor. Then the abrasive article was removed from the production tool.
  • Comparative Example CE1 was a standard density foam of a melamine-formaldehyde thermoset resin, obtained from BASF in 1 inch thickness. Results are provided in Table 2.
  • non-scratch properties of the abrasive articles can be tuned by adjusting the UADA:TMPTA and/or TA:PCC ratios. Increases in each ratio lead to a softer, more compliant abrasive article that will generally scratch less, yet also require more effort when used to clean a surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
EP21740221.3A 2020-07-07 2021-07-07 Kratzfreier schleifverbundstoff Pending EP4178763A1 (de)

Applications Claiming Priority (3)

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US202063049106P 2020-07-07 2020-07-07
US202063123597P 2020-12-10 2020-12-10
PCT/IB2021/056100 WO2022009119A1 (en) 2020-07-07 2021-07-07 Non-scratch abrasive composite

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EP4178763A1 true EP4178763A1 (de) 2023-05-17

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US (1) US20230364743A1 (de)
EP (1) EP4178763A1 (de)
JP (1) JP2023533010A (de)
KR (1) KR20230035059A (de)
CN (1) CN115812022A (de)
TW (1) TW202206478A (de)
WO (1) WO2022009119A1 (de)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US862A (en) 1838-08-01 Manufacture of leaden or other metallic pipes
US5152917B1 (en) 1991-02-06 1998-01-13 Minnesota Mining & Mfg Structured abrasive article
US5435816A (en) 1993-01-14 1995-07-25 Minnesota Mining And Manufacturing Company Method of making an abrasive article
US5658184A (en) 1993-09-13 1997-08-19 Minnesota Mining And Manufacturing Company Nail tool and method of using same to file, polish and/or buff a fingernail or a toenail
US5626512A (en) 1995-05-04 1997-05-06 Minnesota Mining And Manufacturing Company Scouring articles and process for the manufacture of same
US5681361A (en) 1996-01-11 1997-10-28 Minnesota Mining And Manufacturing Company Method of making an abrasive article and abrasive article produced thereby
US5851247A (en) 1997-02-24 1998-12-22 Minnesota Mining & Manufacturing Company Structured abrasive article adapted to abrade a mild steel workpiece
US6056794A (en) * 1999-03-05 2000-05-02 3M Innovative Properties Company Abrasive articles having bonding systems containing abrasive particles
US7267700B2 (en) 2003-09-23 2007-09-11 3M Innovative Properties Company Structured abrasive with parabolic sides
UA86300C2 (uk) * 2005-01-28 2009-04-10 Сеинт-Гобен Ебрейсивз, Инк. Абразивний виріб, способи виготовлення абразивного виробу та зв'язуюча композиція
US7344575B2 (en) * 2005-06-27 2008-03-18 3M Innovative Properties Company Composition, treated backing, and abrasive articles containing the same
JP7056877B2 (ja) * 2016-12-07 2022-04-19 スリーエム イノベイティブ プロパティズ カンパニー 可撓性研磨物品
JP2021523307A (ja) * 2018-05-10 2021-09-02 スリーエム イノベイティブ プロパティズ カンパニー 非擦傷性組成物及び研磨洗浄物品

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TW202206478A (zh) 2022-02-16
CN115812022A (zh) 2023-03-17
US20230364743A1 (en) 2023-11-16
WO2022009119A1 (en) 2022-01-13
JP2023533010A (ja) 2023-08-01
KR20230035059A (ko) 2023-03-10

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