EP2644078A2 - Elément de nettoyage - Google Patents

Elément de nettoyage Download PDF

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Publication number
EP2644078A2
EP2644078A2 EP20130158970 EP13158970A EP2644078A2 EP 2644078 A2 EP2644078 A2 EP 2644078A2 EP 20130158970 EP20130158970 EP 20130158970 EP 13158970 A EP13158970 A EP 13158970A EP 2644078 A2 EP2644078 A2 EP 2644078A2
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EP
European Patent Office
Prior art keywords
cleaning
binder
disc
abrasive
crystallization agent
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Withdrawn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
EP20130158970
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German (de)
English (en)
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EP2644078A3 (fr
Inventor
Michael Rössler
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.)
RCS-Steinbodensanierung GmbH
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RCS-Steinbodensanierung GmbH
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 RCS-Steinbodensanierung GmbH filed Critical RCS-Steinbodensanierung GmbH
Publication of EP2644078A2 publication Critical patent/EP2644078A2/fr
Publication of EP2644078A3 publication Critical patent/EP2644078A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036—Parts or details of the surface treating tools
    • A47L11/4038—Disk shaped surface treating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • 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

Definitions

  • the present invention relates to a circular disk-like cleaning element, in particular for attachment to a support plate of a floor cleaning machine, with a textile cleaning disc which is at least partially provided with a particulate abrasive on its surface facing away from the support plate. Furthermore, the invention relates to a cleaning machine, which is equipped with such a cleaning element and the use of such a cleaning element.
  • floor coverings of calcium carbonate-containing material are used, such as marble or terrazzo floors.
  • These floors are visually appealing, but are subject to higher wear compared to other floor coverings such as those made of granite due to the lower hardness. This usually manifests itself by small scratches in the surface, especially in the area of the most commonly used paths.
  • relatively aggressive cleaning chemicals must be used, which also enforce the flooring. Both ultimately lead to a roughening of the soil surface, which in turn makes cleaning more difficult.
  • the scratches or the surface of the soil roughened by chemicals are sanded off to produce a smooth and shiny floor surface.
  • the cleaning element consists of a non-woven textile fabric of thermoplastic fibers, which are glued together.
  • abrasive particles having an average particle diameter in the range of 0.1 to 9 ⁇ m are bonded to the fibers. These abrasive particles cause in the use of such a floor cleaning machine the aforementioned smoothing of the damaged surface of the soil.
  • Another suitable for this purpose cleaning element is made DE 603 18 184 T2 known.
  • a round cleaning element is also used, wherein the floor cleaning machine is provided on its working surface with a plurality of grinding elements which are mounted in recesses of the cleaning element. each the grinding elements is resiliently secured by means of a thermoplastic holder on the cleaning element.
  • the goal of the floor sealing is to improve the gloss and increase the wear resistance of the floor covering.
  • special chemicals are used in the floor cleaning, such as in the US Pat. No. 1,619,734 discloses in liquid form or as from the US 5,123,958 A
  • oxalic acid-containing chemicals in particular potassium hydrogen oxalate, which is also referred to as clover salt, is known.
  • potassium hydrogen oxalate reacts with calcium carbonate to form sparingly soluble calcium oxalate. Since the cleaning chemicals can penetrate only slightly into the soil surface, the aforementioned reaction leads to a superficial change of the flooring by the calcium carbonate of the flooring is converted into a thin shiny layer of calcium oxalates. This method is also called wet crystallization.
  • MgSiF 6 magnesium fluorosilicate
  • CaF 2 sparingly soluble calcium fluoride
  • the resulting solid reaction products ie magnesium fluoride, calcium fluoride and quartz (SiO 2 ) are deposited in the soil surface and form a hard, shiny and little water-permeable layer.
  • the layer thickness produced thereby depends on the type of floor covering treated and the treatment intensity and is typically not more than 50 ⁇ m.
  • liquid cleaning chemicals which may contain the aforesaid crystallization agents is also disclosed in U.S. Pat DE 693 02 736 T2 described.
  • the gloss of a terrazzo or marble floor created during tillage depends on several factors. These include the type of abrasive article used, the type and amount of auxiliary chemical used with the abrasive article, the pressure applied to the soil, the speed of rotation of the abrasive article, and the treatment time at a given pressure. To ensure acceptable gloss generation as a result of the treatment procedure, the user attempts to optimize all these parameters. The goal is a high gloss, a high resistance and a stain-resistant floor, which should be achieved with a minimum of work.
  • a finely ground marble floor is little or no resistant to staining due to its porous surface, unless a separate protective coating has been applied.
  • the appearance of the honed floor typically leaves something to be desired.
  • the ground has been further polished with diamond abrasives to give a very high gloss, the surface of the marble undergoes a rapid deterioration of gloss due to foot abrasion or abrasion by other loads. The associated roughening of the soil can further degrade the stain sensitivity of the surface.
  • a typical composition of the aforementioned type is known for example from the publication of Hoechst Celanese Corp. "Floor Polish Bulletin: Crystallization Treatment for Stone Floors, Formulation FA 1401" (1985 ) known.
  • the formulation comprises an aqueous dispersion of magnesium hexafluorosilicate, a surfactant, nonylphenol with 10 moles of ethylene oxide, an organic acid and a wax.
  • the composition should be incorporated with a steel wool mat on the ground.
  • steel wool tends to leave chips in the skin (in many cases, the user makes the mats by hand from a steel wool stock); and, when used as a mat on the floor, tends to bunch or rupture, rendering the mat unsuitable for continued polishing, even though much of the original steel wool remains on the floor Mat remains.
  • U.S. Patent No. 2,958,293 Hoover et al.
  • stainless steel wool mats were also used to prevent or retard rusting of the mat.
  • stainless steel wool mats are more expensive than plain carbon steel mats, are no less difficult to handle, and have the same tendency to rupture or agglomerate in use.
  • a liquid acid composition and a particulate abrasive material are mixed to form a slurry and poured onto the floor.
  • the slurry is incorporated into the soil with a rotary soil machine so as to simultaneously effect a polishing action and easy dissolution of the calcium carbonate in the marble by the acid.
  • Mats used in this class of processes conventionally consist of one of several materials, including felts and mats of synthetic non-woven fibers. Such felts are for example in US 3,537,121 B such as US 4,893,439 B described.
  • a nonwoven fabric which comprises abrasive particles having a diameter in the range of 10 microns to 0.71 mm.
  • Another problem is that the result of the surface treatment, in particular, the thickness of the sealing layer can hardly be checked, which makes the reproducibility of the processing difficult. It is therefore up to the experience of the operating staff of the floor cleaning machine to ensure a uniform soil preparation. This can not always be guaranteed.
  • the object of the present invention was to provide a cleaning element of the type mentioned, with a reproducible tillage while reducing effort is possible.
  • a circular disc-like cleaning element in particular for attachment to a support plate of a floor cleaning machine, with a textile cleaning disc which is at least partially provided with a particulate abrasive at least on its surface facing away from the carrier plate, wherein the cleaning disc is equipped with a crystallization agent, which is incorporated in a polymeric binder and / or contained in a fixed on the cleaning disc side of the cleaning body shaped body.
  • the invention is based on the finding that the crystallization agent can in principle be used as a constituent of the purification element, that is to say it does not have to be added in liquid form as a purification chemical. This facilitates the floor cleaning considerably, since the chemicals required for the surface sealing are already provided by the cleaning element, so do not have to be added manually. If the crystallization agent is consumed in the cleaning element, this can then be replaced to continue with the processing.
  • the cleaning cloth cleaning disk may comprise a fabric, a knit, a scrim, a felt, a fleece, or combinations thereof.
  • a base fabric with a needled non-woven fabric in question For example, a base fabric with a needled non-woven fabric in question.
  • the particles of the abrasive may be incorporated into the polymeric binder and dispersed in the fibers of the cleaning disk and adhered thereto.
  • the abrasive particles may be single particles or agglomerates of individual particles.
  • the abrasive may be any known abrasive that is commonly used in the art of abrasives and has a greater hardness than marble.
  • the CRC Handbook of Chemistry and Physics, 61st Edition, 1980/81, p. F24 , for marble is a hardness of 3-4 Mohs, for talc of 1 Mohs, for garnet of 7 Mohs, for alumina of 9+ Mohs and for silicon carbide of 9+ Mohs.
  • the abrasive particles have a hardness of 6 Mohs or above.
  • suitable abrasive particles are single silicon carbide abrasive grains (including refractory coated silicon carbide abrasive grains as described in U.S. Pat U.S. Patent No. 4,505,720 fused alumina, heat treated fused alumina, alumina / zirconia (including fumed alumina / zirconia as disclosed in U.S. Pat U.S. Patent Nos. 3,781,172 .
  • the particulate abrasive preferably has an average particle size of 0.1 to 30 .mu.m, in particular 0.5 to 20 microns. This can be determined by methods known per se, such as light microscopy or with an electron microscope.
  • the abrasive particles are preferably incorporated in a coatable precursor of the binder.
  • This can be, for example, a liquid containing the binder, which may contain water and / or organic solvent, latex or another resin and other constituents.
  • the binder can be present for example as a dispersion or solution.
  • the mass fraction of abrasive is preferably 10 to 80 wt .-%, more preferably from 20 to 70 wt .-%.
  • the material of the cleaning disk can be constructed, for example, of crimped, thermoplastic organic staple fibers, such as polyamide and polyester fibers. Although crimping is not necessary to the invention, crimped staple fibers can be made into nonwoven fabric using conventional fabric-making machines. From such nonwoven fabric formations a cleaning disk can then be created, for example by punching or cutting.
  • the cleaning disc is usually circular and can also be provided in the middle with a central recess.
  • Methods suitable for making nonwoven fabrics of crimped synthetic staple fibers are, for example, in US 2,958,593 B such as US 3,537,121 B described. Continuous crimped or uncurled fibers can also be used.
  • the staple fibers may be crimped in the stuffer box, spirally crimped, such as in US 4,893,439 B, or a combination of both.
  • the nonwoven fabric may contain up to 50% by weight of melt-bondable fibers to assist in stabilizing the nonwoven fabric and to facilitate application of the coating resin, preferably 20 to 30% by weight.
  • Suitable staple fibers known in the art are typically polyester or polyamide, although the use of other fibers, such as rayon, is also known. It is also possible to use mixtures of the aforementioned fibers.
  • suitable melt-spliceable fibers may be composed of polypropylene or other low melting polymers, such as polyesters, so long as the temperature at which the melt-bondable fibers melt is lower than the temperature at which the physical properties of the staple fibers or melt-bondable fibers deteriorate.
  • Melt-bondable fibers which are suitable for use in this invention must be activatable at elevated temperatures below temperatures which would affect the spirally-crimped fibers.
  • these fibers may preferably be co-processed using conventional fabric forming equipment with the spirally-crimped fibers to form a loosely elastic, open, nonwoven, nonwoven fabric structure.
  • melt-bondable fibers typically have a core and a concentric sheath, have been crimped in the stuffer box with 6 to 12 crimps per 25 mm, and have a stack cut length of 25 to 100 mm.
  • Composite fibers have a tenacity of 2-3 g / denier.
  • melt-bondable fibers may have a side-by-side structure or a core-eccentric-shell structure.
  • the preferred fibers of this invention are spirally crimped polyester staple fibers in combination with a low melt fuser melt bondable fiber. Particularly preferred are spirally-crimped polyethylene terephthalate (PET) fibers. From the US 3,595,738 B is a method of making spirally crimped bicomponent polyester fibers. The fibers made by the process of this patent have a reverting helical crimp. Fibers with a reverting helical crimp are preferred over fibers that are crimped in a helical structure such as a coil spring. However, both types of helically crimped fibers are suitable for this invention.
  • Spirally-crimped fibers typically and preferably have from 1 to 15 full-circle crimps per 25 mm fiber length, while crimped fibers in the stuffer box have from 3 to 15 full-circle crimps per 25 mm fiber length.
  • the spirally-crimped fibers When spirally-crimped fibers are used in conjunction with crimped fibers in the stuffer box, the spirally-crimped fibers preferably have fewer crimps per unit length than the stuffer box fibers, as taught in the '439 patent.
  • the crimp index a measure of fiber elasticity, is preferably in the range of 35 to 70% for helically crimped fibers, which also applies to crimped fibers in the stuffer box.
  • the crimp index can be determined by measuring the fiber length with a suitable "high load” attached to the fiber, then subtracting the fiber length from it with a suitable "low load” attached thereto, and then subtracting the result by the length of the fiber in the divided by the high load and multiplied by 100.
  • the low load is 0.1-0.2 grams and the high load is 5
  • the crimp index can also be determined after exposing the test fibers to an elevated temperature, eg 135 ° C to 175 ° C, for 5 to 15 minutes, and this value can be compared to the index before exposure to heat Ripple index measured after the fiber has been exposed to elevated temperature, eg 135 ° C to 175 ° C, for 5 to 15 minutes should be greater than that observed before Heat exposure was measured, did not change significantly.
  • the load can be applied either horizontally or vertically.
  • Fiber length of the fibers used depends on the limitations of the processing equipment on which the cleaning disc is made. However, depending on the type of equipment, fibers of different lengths or combinations thereof may very well be used in forming the loosely elastic open fabrics with the desired end properties specified herein. Fiber lengths suitable for helically crimped fibers are preferably in a range of 60 mm to 150 mm, while suitable fiber lengths for stuffer box fibers are in a range of 25 to 70 mm.
  • the thread thickness or thread count of the fibers used for textile cleaning disc can vary within wide ranges and for example be 6 to 400 denier, in particular from 15 to 200 denier, preferably 50 to 100 denier.
  • the thickness of the textile cleaning disk can be adjusted within wide ranges and in the uncompressed state is for example at least 0.5 cm, in particular 2 cm to 4 cm.
  • the thickness of the carrier plate can move in the same areas regardless of the thickness of the cleaning disk.
  • the textile cleaning disc is at least partially provided with a particulate abrasive.
  • a particulate abrasive is bound by means of a binder to the textile cleaning disc.
  • This binder may be the same as or different from that in which the crystallization agent is incorporated. If both binders are identical, it makes sense to introduce both the particulate abrasive and the crystallization agent into a precursor of the binder and then to equip the cleaning disc herewith.
  • the crystallizing agent used in the present invention is preferably selected from those for crystallizing calcium carbonate-containing surfaces such as marble floors, wherein the crystallizing agent is especially an acidic crystallizing agent capable of reacting with the calcium in the calcium carbonate-containing surface to form an insoluble calcium salt.
  • the crystallizing agent is especially an acidic crystallizing agent capable of reacting with the calcium in the calcium carbonate-containing surface to form an insoluble calcium salt.
  • calcium fluoride or calcium oxalate in particular MgSiF 6 , oxalic acid and / or an oxalate, such as potassium hydrogen oxalate in question.
  • These substances are typically used according to the invention as solids. These can be mixed with the binder before the cleaning disc is coated.
  • the crystallization agent is contained in a shaped body or designed as a molded body and fixed to its base by means of a fastening device on the cleaning disk and / or fixed to the support plate.
  • the crystallization agent can be pressed into a desired shape, wherein the crystallization agent may be added other substances such as surfactants, waxes, thickeners and the like.
  • the shaped body can contain a binder in addition to the crystallization agent. In this way, the cohesion of the molding is improved and also dilutes the crystallizing agent in the binder matrix. Thereby, the release rate of the crystallization agent can be controlled.
  • a recess for the implementation of the molding is provided in the cleaning disk and the fastening device formed flat, wherein the fastening device is larger than the base of the molded body and / or dimensioned as the recess, so that a stop surface is formed on the fastening device.
  • the molding can be fixed in this way between the cleaning disk and the support plate of the floor cleaning machine.
  • the larger-sized fastening device prevents the slipping of the molded body through the recess. This is particularly advantageous, because in this way the molded body can be easily replaced when it is consumed.
  • the fastening device may be made of plastic, for example polypropylene or rigid PVC.
  • the shaped body may, for example, have a diameter of 5 to 10 cm and the fastening device each have a diameter which exceeds that of the shaped body by 1 to 2 cm.
  • the diameter of the recess may correspond to that of the shaped body.
  • the thickness of the shaped body can likewise vary within wide ranges and be, for example, 2 to 4 mm, in particular about 2 to 3 mm. However, larger thicknesses are possible.
  • each molded body can be assigned a separate fastening device.
  • a plurality of moldings are mounted on a fastening device, for example in pairs or in groups of three or more moldings.
  • the fastening device may be provided on its side facing the molding with one or more retaining pins, in particular in the region of the stop surface.
  • a hedgehog lining is formed, which fixes the fastening device in particular against shear stress but also to some extent against tensile stress (for example, when attaching the cleaning disc to the carrier plate of the machine).
  • a spring element can be provided between the shaped body and the fastening device, in particular a spring element made of foam.
  • shocks can be better absorbed, which can occur, for example, when the arranged in the rotating cleaning disc moldings abuts against an edge on a Bodenfuge.
  • connection between the molded body, the fastening device or the spring element can be done in various ways. It is expedient to glue the individual components together, wherein expediently a non-water-soluble adhesive should be used.
  • the molded body may have various external configurations.
  • this can be circular-cylindrical or oval-cylindrical, have a cuboidal shape with a rectangular or square base, a cubic shape or a columnar shape with a triangular or polygonal base.
  • the binder of the molding as well as the binder with which the crystallization agent is fixed to the cleaning disk is a variety of substances or binder compositions into consideration.
  • any thermoplastic or thermosetting resin can be used which is compatible in its cured state with the selected fiber, the crystallizing agent and / or the abrasive.
  • the binders can each be chosen independently of each other.
  • examples of usable polymeric binders are in particular synthetic polymers, such as styrene / butadiene copolymers (SBR), carboxylated SBR copolymers, phenolic resins, phenol-aldehyde resins, acrylic resins, melamine resins, urea-aldehyde resins, polyesters, polyamides, polyureas, polyvinylidene chloride, Polyvinyl chloride, epoxy resins, acrylic acid / methyl methacrylate copolymers, acetal copolymers, polyurethanes, polyvinyl alcohols, Polyvinyl acetates, latex and copolymers and / or mixtures of these.
  • SBR styrene / butadiene copolymers
  • carboxylated SBR copolymers such as styrene / butadiene copolymers (SBR), carboxylated
  • a phenolic resin, melamine resin, urea resin and / or epoxy resin is particularly suitable.
  • the binder may contain other typical additives such as plasticizers, stabilizers, defoamers, polymerization catalysts, initiators, non-abrasive fillers, dyes and / or pigments. Dyes and pigments, for example, make sense to make cleaning discs with different particle size of the abrasive color distinguishable from each other.
  • the fibers of the cleaning disc are polyester fibers, it may be preferable to use as terpolymeric latex resins formed by linear or branched copolymerization of a mixture of an unfunctionalized monoethylenically unsaturated comonomer, a functionalized monoethylenically unsaturated comonomer and a nonfunctionalized diethylenically unsaturated comonomer.
  • "Functionalized” in this context means that the corresponding monomer having a Zerewitinoff-reactive structural unit such as -OH, NH 2 , COOH and the like, wherein “non-functionalized” refers to a monomer having no such reactive structural unit.
  • the amount of functionalized monoethylenically unsaturated monomer is typically not well known, but is believed to be 1 to 10 mole percent of the total monomer.
  • the amount of styrene is in a range of from 50 mole% to 80 mole%, preferably from 60 to 70 mole%, more preferably 65 mole%, as the mole percent of styrene and butadiene.
  • the foregoing terpolymers may be used uncrosslinked, but are preferably crosslinked by the reaction of the reactive COOH moiety with a polyfunctionalized monomer such as a phenolic or melamine resin.
  • Crosslinking resins can be used to improve the water and solvent resistance of the cleaning disk and to increase its strength.
  • Melamine-formaldehyde resins such as the fully methylated, low methylol free melamine-formaldehyde resins sold under the trade designations "Cymel 301", 1133 and 1168, "Cymel 303" and "Aerotex M-3", and like, are suitable. The former gives a slightly higher tensile strength, while the latter increases the stiffness and elasticity of the nonwovens.
  • Phenolic resins have also been used as crosslinking resins such as those sold under the trade designations "433" (Monsanto) and "R-7" (carborundum) and the like.
  • the latex resins used When the latex resins used are crosslinked, they have a degree of crosslinking of more than 10%, usually having a crosslinking in the range of 15% to 80%, more often a crosslinking in the range of 25% to 60% and typically in a crosslinking range from 45% to 55%.
  • the calculated or theoretical percentage of crosslinking is defined as the weight of the polyfunctionalized monomer or polyfunctionalized monomers divided by the total weight of the monomers.
  • Non-functionalized monoethylenically unsaturated monomers which are generally suitable for preparing suitable linear, branched and crosslinked latex resins include styrene, ethylvinylbenzene and vinyltoluene, with styrene being particularly preferred.
  • the diethylenically unsaturated monomers useful in the invention include isoprene, butadiene and chloroprene, with butadiene being particularly preferred.
  • binders comprising the following polymers are particularly useful: phenolic resins, aminoplast resins, urethane resins, urea-aldehyde resins, isocyanurate resins, and mixtures thereof.
  • phenolic resins are those known under the trade names "Varcum” and “Durez” (from Occidental Chemicals Corp., N. Tonawanda, New York) and "Arofene” (from Ashland Chemical Co.).
  • the content of the crystallization agent in the cured binder can vary over wide ranges and is for example 1 to 80 wt .-%, in particular 5 to 70 wt .-%, preferably 5 to 70 wt .-% and particularly preferably 10 to 60 wt .-%.
  • the content is, for example, 5 to 80 wt%, more preferably 10 to 70 wt%, and particularly preferably 15 to 65 wt%.
  • Another object of the present invention relates to a cleaning machine, in particular rotary floor cleaning machine such as a scrub-suction combination machine for cleaning calcium carbonate-containing surfaces such as marble floors, with a circular disc-like cleaning element according to the invention.
  • the cleaning element according to the invention can be used on single-disc but also on multi-disc machines such as two-disc or three-disc machines.
  • the present invention further relates to the use of a circular disc-like cleaning element according to the invention or a cleaning machine equipped therewith for cleaning calcium carbonate-containing surfaces such as marble floors.
  • a cleaning disk according to the invention it is possible, for example, to apply a precursor of the binder in the form of a mixture comprising uncured resin, the crystallizing agent and, if desired, the abrasive and other additives, such as thickening agent, to a textile cleaning disc with the aid of the two-roll coating , Then, the binder precursor is cured in the course of further processing or to form a hardened binder polymerized.
  • a dispersion or solution of the binder can be used in an analogous manner, wherein the solvent or the dispersing medium is evaporated to cure.
  • the mixture can be sprayed, painted, rolled or doctored onto the cleaning disc, or the cleaning disc is soaked in the mixture.
  • the binder can be applied to the disk without crystallization agent or abrasive and the crystallization agent and / or the abrasive agent can be electrostatically or mechanically deposited thereon.
  • the crystallization agent it is preferable to distribute it as homogeneously as possible in the binder before applying the binder to the cleaning disk. In this way it can be ensured that the binder acts as a reservoir for the crystallization agent and continuously releases crystallization agent during use.
  • the binder may be present before the coating as a solution or dispersion. If a water-based binder is used, the crystallization agent can dissolve depending on your choice. Since the binder is removed from the binder after the coating of the cleaning disc, the crystallization agent is then back in solid form and is incorporated in the polymeric binder.
  • a circular disk-like cleaning element 1 is shown for attachment to a support plate 2 of a floor cleaning machine.
  • the cleaning element 1 textile cleaning disk 3.
  • the connection between the support plate 2 and the textile cleaning disc 3 takes place, for example, via a hook and loop fastener or a hedgehog covering formed on the support plate 2.
  • a central circular recess 4 In the middle of the cleaning disc 3 is a central circular recess 4, which facilitates the centering of the cleaning disc 3 on the support plate 2.
  • the cleaning disk 3 is impregnated with a particulate abrasive having an average particle size of, for example, 2 ⁇ m.
  • the particulate abrasive consists of a mixture of about 50 wt .-% industrial diamond particles of the aforementioned particle size and 50 wt .-% silicon carbide. To fix the particulate abrasive this is embedded in an organic binder in the form of a phenolic resin, with which the cleaning disk is impregnated.
  • the binder also contains a crystallizing agent in the form of oxalic acid. In the cured binder, the proportion of abrasive is 40 wt .-% and that of the crystallization agent 10 wt .-%, each based on the total mixture.
  • FIGS. 3 and 4 an alternative embodiment of a cleaning element according to the invention is shown.
  • the crystallization agent (clover salt) is contained here together with a binder, in the present case a melamine resin, in round-cylindrical shaped bodies 5, which are attached to fastening devices 7 via spring elements 6 made of foam.
  • the molded body 5 has a Diameter of 50 mm and a height of 3 mm.
  • the molded body 5, the spring element 6 and the fastening device 7 are glued together.
  • the proportion of the crystallization agent in the molding is about 30 wt .-%.
  • the moldings 5 are arranged crosswise in the cleaning disk 3.
  • a recess 8 is provided, through which the molded body 5 is performed.
  • the fastening device 7 is formed flat, wherein the fastening device 7 is larger than the base surface of the shaped body 5 and dimensioned as the recess 8, so that on the fastening device 7, a stop surface 9 is formed, which prevents slipping of the molded body 5 through the recess 8.
  • the fastening device 7 is provided on its side facing the molded body 5 in the region of the stop surface 9 with a plurality of holding thorns 10 which can engage in the textile structure of the cleaning disk and thus ensure a secure fixation.
  • FIG. 6 is one of those in the FIGS. 3 and 4 modified embodiment of a cleaning element 1 according to the invention shown. This differs from the above-described embodiment primarily in that the crystallizing agent contained or consisting of the molded body 5 are each combined in groups of 3 and arranged crosswise on the cleaning disk 3. In this case, every 3-membered group of moldings 5 each arranged on a fastening device 7.
  • the shaped bodies 5 are in the same way as in FIG. 6 shown, wherein for ease of attachment of the fastening means 6 respectively triangular recesses 7 are provided in the cleaning disc 3 instead of the round recesses as in FIG. 6 ,
  • cleaning element 2 support plate 3 cleaning disc 4 central recess 5 moldings 6 damping element 7 fastening device 8th recess 9 stop surface 10 holding mandrel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
EP13158970.7A 2012-03-27 2013-03-13 Elément de nettoyage Withdrawn EP2644078A3 (fr)

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DE201210102650 DE102012102650B3 (de) 2012-03-27 2012-03-27 Reinigungselement und Reinigungsmaschine

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EP2644078A2 true EP2644078A2 (fr) 2013-10-02
EP2644078A3 EP2644078A3 (fr) 2015-06-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111183199A (zh) * 2017-10-02 2020-05-19 3M创新有限公司 细长磨料颗粒、其制备方法以及包含细长磨料颗粒的磨料制品

Citations (20)

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CN111183199A (zh) * 2017-10-02 2020-05-19 3M创新有限公司 细长磨料颗粒、其制备方法以及包含细长磨料颗粒的磨料制品
US11274237B2 (en) 2017-10-02 2022-03-15 3M Innovative Properties Company Elongated abrasive particles, method of making the same, and abrasive articles containing the same
CN111183199B (zh) * 2017-10-02 2022-08-02 3M创新有限公司 细长磨料颗粒、其制备方法以及包含细长磨料颗粒的磨料制品

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