US20130125328A1 - Cleaning sponge made of viscose - Google Patents

Cleaning sponge made of viscose Download PDF

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Publication number
US20130125328A1
US20130125328A1 US13/812,406 US201113812406A US2013125328A1 US 20130125328 A1 US20130125328 A1 US 20130125328A1 US 201113812406 A US201113812406 A US 201113812406A US 2013125328 A1 US2013125328 A1 US 2013125328A1
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Prior art keywords
layer
viscose
cleaning sponge
sponge
elevations
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US13/812,406
Inventor
Marc Hunger
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Carl Freudenberg KG
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Carl Freudenberg KG
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Assigned to CARL FREUDENBERG KG reassignment CARL FREUDENBERG KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUNGER, MARC
Assigned to CARL FREUDENBERG KG reassignment CARL FREUDENBERG KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUNGER, MARC
Publication of US20130125328A1 publication Critical patent/US20130125328A1/en
Abandoned 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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/048—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B32B5/145—Variation across the thickness of the layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0264—Polyester
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/728—Hydrophilic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2432/00—Cleaning articles, e.g. mops, wipes

Definitions

  • the present invention relates to a cleaning sponge.
  • Cleaning sponges including a plurality of layers connected to one another, with a first layer made of viscose and a second layer being a sponge made of a synthetic material, are known from the prior art.
  • the first layer is constructed in the form of a so-called block-shaped viscose material which is discontinuously manufactured in blocks.
  • viscose is produced in a number of processing steps from cellulose using a xanthation reaction.
  • the viscose is mixed with sodium sulfate decahydrate, also known as Glauber's salt, which functions as a pore-forming agent, and is subsequently poured into a mold.
  • xanthate is decomposed.
  • the pore-forming agent is removed in the next processing step. This leads to the formation of a sponge-like structure.
  • the blocks are cut into viscose layers and further processed.
  • a disadvantage of this method is that cutting the blocks to form layers is time-consuming and requires a large number of handling steps. Thus, the production of layers made of block-shaped viscose is expensive and time-consuming.
  • Another disadvantage is that cutting the blocks into layers creates surfaces with open or cut pores in which dirt can accumulate.
  • an object of the present invention is to provide a cleaning sponge which can be easily produced and which has a highly dirt-repellant, yet absorbent surface.
  • a first layer has a first side and a second side, with the first side and/or the second side having a compacted film-like surface and with the film-like surface having a higher density than the rest of the first layer.
  • the film-like surface prevents dirt particles from penetrating into the pores of the viscose. In addition, it also stabilizes the first layer.
  • Viscose manufactured using a method for the continuous production of viscose sponges has the advantage of having a film-like surface or skin. Block-shaped viscose, on the other hand, does not have such a film-like surface since it must be cut to size.
  • a further advantage is that the first layer is durable and has a more hygienic appearance since it is nearly impossible for dirt to get stuck in the surface.
  • a film-like surface has a positive influence on the dirt retention of the first viscose layer.
  • viscose manufactured using a method for the continuous production of viscose sponges has the surfaces desired.
  • the reason is that viscose manufactured by a method for the continuous production of viscose sponges is continuously deposited on a conveyer belt, where it is spread out by a roller, and transported on the conveyer belt through a plurality of baths. In the course of this process, the xanthate is decomposed and the pore-forming agent is removed. This creates a sponge-like structure. Subsequently, a viscose layer is finished with a film-like surface which provides the layer with dirt-repellant properties.
  • the invention makes available a cleaning sponge which can be easily manufactured and which has a highly dirt-repellant and, at the same time, an absorbent surface.
  • the first side and/or the second side can have a contoured surface.
  • a contoured surface helps facilitate the pickup of dirt.
  • the first side could have a contoured surface that has nub-like elevations. Nub-like elevations surprisingly release a relatively small amount of water to a surface to be cleaned. It was also surprising to discover that a side that has nub-like elevations or nubs releases a smaller amount of water than a side with linear elevations or grooves.
  • the first side could have a contoured surface that has linear elevations. Surprisingly, linear elevations release a larger amount of water to a surface to be cleaned than nub-like elevations. Yet, a side of a first viscose layer manufactured by a method for the continuous production of viscose sponges and that has linear elevations still releases a smaller amount of water than a side made of block-shaped viscose.
  • viscose manufactured by a method for the continuous production of viscose sponges releases 0.8 g/m 2 water while block-shaped viscose releases 1.2 g/m 2 . Therefore, a first layer of viscose manufactured by a method for the continuous production of viscose sponges releases approximately 30% less water than a first layer made of block-shaped viscose.
  • the second side could have a contoured surface that has nub-like elevations.
  • the contoured surface facilitates bonding to the second layer since the adhesive interacts with the nub-like elevations in a fusion-bonding and form-fitting manner.
  • the second side could have a contoured surface that has linear elevations.
  • the contoured surface facilitates bonding to the second layer since the adhesive interacts with the linear elevations in a fusion-bonding and form-fitting manner.
  • the second side could face the second layer. This would allow the first layer to be bonded to the second layer or to be laminated to it, with the first side of the first layer not having a cover.
  • a third layer that includes an abrasive element could be provided. This would make it possible to remove coarse caked-on dirt from a surface that is to be cleaned.
  • the abrasive element could be a fiber woven fabric.
  • the fiber woven fabric can be a textile fabric or a nonwoven. Nonwovens can be produced inexpensively and can be easily heat-sealed or bonded to a sponge made of a synthetic material.
  • the abrasive element can take the form of a coating, in particular a polyurethane coating.
  • a coating in the form of a pasty material can be applied with a doctor blade, or it can be sprayed or spread-coated onto the sponge.
  • the coating can contain any particles that are sufficiently hard so as to be able to remove dirt.
  • the first layer could have a density of 60 kg/m 3 .
  • Block-shaped viscose on the other hand, in most cases has a density of only 35 kg/m 3 .
  • the first layer is a preformed layer that could have a thickness of approximately 1 cm.
  • a first layer produced from block-shaped viscose can have any thickness since such a layer is cut from the block.
  • the advantage of the cleaning sponge of the present invention is that the thickness is increased in that a second layer, i.e., the sponge, is attached.
  • This sponge is preferably produced from polyurethane, polyester or polyether.
  • the advantage is that the thickness is increased without loss of the water-absorbing capacity. More specifically, the sponge acts as a spacer and stabilizes the cleaning sponge in such a manner that any potential shrinkage in the thickness, length and width of the final product is reduced.
  • each of FIGS. 1-4 shows a top view of a first layer made of viscose
  • each lower portion shows a sectional view of the cleaning sponge.
  • FIG. 1 includes in its upper portion a top view of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 2 includes in its upper portion a top view of another embodiment of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 3 includes in its upper portion a top view of another embodiment of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 4 includes in its upper portion a top view of another embodiment of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 1 provides a sectional view of a cleaning sponge including a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge made of a synthetic material.
  • the first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides (i.e., side 1 a ) having a contoured surface.
  • the side 1 b is smooth.
  • the first side 1 a has a contoured surface that has linear elevations. These can be seen in the upper portion of FIG. 1 .
  • the first side 1 a has a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1 .
  • the second side 1 b faces the second layer 2 .
  • a third layer 3 is also provided which has an abrasive element.
  • the abrasive elements takes the form of a coating 3 a.
  • FIG. 2 provides a sectional view of a cleaning sponge including a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge that is made of a synthetic material.
  • the first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides having a contoured surface.
  • the first side 1 a has a contoured surface that has nub-like elevations. These can be seen in the upper portion of FIG. 2 .
  • the second side 1 b has a contoured surface that has linear elevations.
  • the first side 1 a and the second side 1 b have a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1 .
  • the second side 1 b faces the second layer 2 .
  • a third layer 3 is also provided which includes an abrasive element.
  • the abrasive element takes the form of a coating 3 a.
  • FIG. 3 provides a sectional view of a cleaning sponge including a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge made of a synthetic material.
  • the first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides having a contoured surface.
  • the first side 1 a has a contoured surface that has nub-like elevations. These can be seen in the upper portion of FIG. 3 .
  • the second side 1 b has a contoured surface that has linear elevations.
  • the first side 1 a and the second side 1 b have a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1 .
  • the second side 1 b faces the second layer 2 .
  • a third layer 3 is also provided which includes an abrasive element.
  • the abrasive element takes the form of a fiber-woven fabric 3 b.
  • FIG. 4 shows a sectional view of a cleaning sponge comprising a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge made of a synthetic material.
  • the first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides (i.e., side 1 a ) having a contoured surface.
  • the side 1 b is smooth.
  • the first side 1 a has a contoured surface that has linear elevations. These can be seen in the upper portion of FIG. 4 .
  • the first side 1 a has a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1 .
  • the second side 1 b faces the second layer 2 .
  • a third layer 3 is also provided that includes an abrasive element.
  • the abrasive element takes the form of a fiber-woven fabric 3 b.
  • the sponge which constitutes the second layer 2 can be made of polyester, polyurethane or polyether.
  • the first layer 1 is made of viscose that is manufactured using a method for the continuous production of viscose sponges. This first layer is cut in the longitudinal and/or transverse direction. In the z-direction, i.e., in the direction of its thickness, the first layer 1 is not cut, but preformed.
  • the third layer 3 is disposed on the side of the second layer 2 , which side faces away from the first layer 1 .
  • the second layer 2 is sandwiched between the first layer 1 and the third layer 3 .
  • both the first side 1 a and the second side 1 b may have a smooth surface, with the first side 1 a and the second side 1 b having a compacted film-like surface and with the film-like surface having a higher density than the rest of the first layer 1 .

Abstract

The aim of the invention is to specify a cleaning sponge that can be produced without problems and that has a surface that is as dirt-repellent as possible yet absorbent. According to the invention, a cleaning sponge, composed of a plurality of layers (1, 2, 3) connected to each other, a first layer (1) being made of viscose and a second layer (2) being designed as a sponge that is made of a plastic, is characterized in that the first layer (1) has a first side (1 a) and a second side (1 b), the first side (1 a) and/or the second side (1 b) having a compressed film-like surface and the film-like surface having a higher density than the rest of the first layer (1).

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This patent application is the national phase of PCT/EP2011/001418, filed Mar. 22, 2011 which claims the benefit of German Patent Application No. 10 2010 034 193.2, filed Aug. 12, 2010.
    • FIELD OF THE INVENTION
  • The present invention relates to a cleaning sponge.
    • BACKGROUND OF THE INVENTION
  • Cleaning sponges including a plurality of layers connected to one another, with a first layer made of viscose and a second layer being a sponge made of a synthetic material, are known from the prior art.
  • The first layer is constructed in the form of a so-called block-shaped viscose material which is discontinuously manufactured in blocks. In the prior-art manufacturing method used, viscose is produced in a number of processing steps from cellulose using a xanthation reaction. The viscose is mixed with sodium sulfate decahydrate, also known as Glauber's salt, which functions as a pore-forming agent, and is subsequently poured into a mold. In a subsequent processing step, xanthate is decomposed. The pore-forming agent is removed in the next processing step. This leads to the formation of a sponge-like structure. Subsequently, the blocks are cut into viscose layers and further processed.
  • A disadvantage of this method is that cutting the blocks to form layers is time-consuming and requires a large number of handling steps. Thus, the production of layers made of block-shaped viscose is expensive and time-consuming.
  • Another disadvantage is that cutting the blocks into layers creates surfaces with open or cut pores in which dirt can accumulate.
    • SUMMARY OF THE INVENTION
  • Accordingly, an object of the present invention is to provide a cleaning sponge which can be easily produced and which has a highly dirt-repellant, yet absorbent surface.
  • According to the present invention, a first layer has a first side and a second side, with the first side and/or the second side having a compacted film-like surface and with the film-like surface having a higher density than the rest of the first layer. The film-like surface prevents dirt particles from penetrating into the pores of the viscose. In addition, it also stabilizes the first layer. Viscose manufactured using a method for the continuous production of viscose sponges has the advantage of having a film-like surface or skin. Block-shaped viscose, on the other hand, does not have such a film-like surface since it must be cut to size. A further advantage is that the first layer is durable and has a more hygienic appearance since it is nearly impossible for dirt to get stuck in the surface. A film-like surface has a positive influence on the dirt retention of the first viscose layer.
  • Specifically, it was found that viscose manufactured using a method for the continuous production of viscose sponges has the surfaces desired. The reason is that viscose manufactured by a method for the continuous production of viscose sponges is continuously deposited on a conveyer belt, where it is spread out by a roller, and transported on the conveyer belt through a plurality of baths. In the course of this process, the xanthate is decomposed and the pore-forming agent is removed. This creates a sponge-like structure. Subsequently, a viscose layer is finished with a film-like surface which provides the layer with dirt-repellant properties. Specifically, it was found that when manufacturing the first viscose layer using a method for the continuous production of viscose sponges, this layer requires cutting only in the longitudinal direction and/or transverse direction, but not in the direction of its thickness. It is therefore possible to produce the cleaning sponge with only a few handling steps. Thus, the invention makes available a cleaning sponge which can be easily manufactured and which has a highly dirt-repellant and, at the same time, an absorbent surface.
  • The first side and/or the second side can have a contoured surface. A contoured surface helps facilitate the pickup of dirt.
  • The first side could have a contoured surface that has nub-like elevations. Nub-like elevations surprisingly release a relatively small amount of water to a surface to be cleaned. It was also surprising to discover that a side that has nub-like elevations or nubs releases a smaller amount of water than a side with linear elevations or grooves.
  • The first side could have a contoured surface that has linear elevations. Surprisingly, linear elevations release a larger amount of water to a surface to be cleaned than nub-like elevations. Yet, a side of a first viscose layer manufactured by a method for the continuous production of viscose sponges and that has linear elevations still releases a smaller amount of water than a side made of block-shaped viscose. By way of an example, it was determined that viscose manufactured by a method for the continuous production of viscose sponges releases 0.8 g/m2 water while block-shaped viscose releases 1.2 g/m2. Therefore, a first layer of viscose manufactured by a method for the continuous production of viscose sponges releases approximately 30% less water than a first layer made of block-shaped viscose.
  • The second side could have a contoured surface that has nub-like elevations. The contoured surface facilitates bonding to the second layer since the adhesive interacts with the nub-like elevations in a fusion-bonding and form-fitting manner.
  • The second side could have a contoured surface that has linear elevations. The contoured surface facilitates bonding to the second layer since the adhesive interacts with the linear elevations in a fusion-bonding and form-fitting manner.
  • The second side could face the second layer. This would allow the first layer to be bonded to the second layer or to be laminated to it, with the first side of the first layer not having a cover.
  • A third layer that includes an abrasive element could be provided. This would make it possible to remove coarse caked-on dirt from a surface that is to be cleaned.
  • The abrasive element could be a fiber woven fabric. The fiber woven fabric can be a textile fabric or a nonwoven. Nonwovens can be produced inexpensively and can be easily heat-sealed or bonded to a sponge made of a synthetic material.
  • The abrasive element can take the form of a coating, in particular a polyurethane coating. A coating in the form of a pasty material can be applied with a doctor blade, or it can be sprayed or spread-coated onto the sponge. The coating can contain any particles that are sufficiently hard so as to be able to remove dirt.
  • The first layer could have a density of 60 kg/m3. Block-shaped viscose, on the other hand, in most cases has a density of only 35 kg/m3.
  • The first layer is a preformed layer that could have a thickness of approximately 1 cm. A first layer produced from block-shaped viscose can have any thickness since such a layer is cut from the block. The advantage of the cleaning sponge of the present invention is that the thickness is increased in that a second layer, i.e., the sponge, is attached. This sponge is preferably produced from polyurethane, polyester or polyether. The advantage is that the thickness is increased without loss of the water-absorbing capacity. More specifically, the sponge acts as a spacer and stabilizes the cleaning sponge in such a manner that any potential shrinkage in the thickness, length and width of the final product is reduced.
  • There are a number of possibilities to improve and further develop the teaching of the present invention to advantage. Thus, reference is made to the following description of preferred practical examples of the cleaning sponge according to the present invention based on the attached drawings.
  • In conjunction with the description of the preferred practical examples based on the drawing, other generally preferred configurations and advanced embodiments of the teaching of the invention will be described as well.
    • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
  • In the drawings, the upper portion in each of FIGS. 1-4 shows a top view of a first layer made of viscose, and each lower portion shows a sectional view of the cleaning sponge.
  • FIG. 1 includes in its upper portion a top view of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 2 includes in its upper portion a top view of another embodiment of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 3 includes in its upper portion a top view of another embodiment of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
  • FIG. 4 includes in its upper portion a top view of another embodiment of a cleaning sponge according to the invention showing a first layer made of viscose and its lower portion a cross-sectional view of the cleaning sponge.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • The lower portion of FIG. 1 provides a sectional view of a cleaning sponge including a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge made of a synthetic material. The first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides (i.e., side 1 a) having a contoured surface. The side 1 b is smooth.
  • The first side 1 a has a contoured surface that has linear elevations. These can be seen in the upper portion of FIG. 1. The first side 1 a has a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1. The second side 1 b faces the second layer 2. A third layer 3 is also provided which has an abrasive element. The abrasive elements takes the form of a coating 3 a.
  • The lower portion of FIG. 2 provides a sectional view of a cleaning sponge including a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge that is made of a synthetic material. The first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides having a contoured surface.
  • The first side 1 a has a contoured surface that has nub-like elevations. These can be seen in the upper portion of FIG. 2. The second side 1 b has a contoured surface that has linear elevations. The first side 1 a and the second side 1 b have a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1. The second side 1 b faces the second layer 2. A third layer 3 is also provided which includes an abrasive element. The abrasive element takes the form of a coating 3 a.
  • The lower portion of FIG. 3 provides a sectional view of a cleaning sponge including a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge made of a synthetic material. The first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides having a contoured surface. The first side 1 a has a contoured surface that has nub-like elevations. These can be seen in the upper portion of FIG. 3. The second side 1 b has a contoured surface that has linear elevations. The first side 1 a and the second side 1 b have a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1. The second side 1 b faces the second layer 2. A third layer 3 is also provided which includes an abrasive element. The abrasive element takes the form of a fiber-woven fabric 3 b.
  • The lower portion of FIG. 4 shows a sectional view of a cleaning sponge comprising a plurality of layers that are connected to one another, with a first layer 1 being made of viscose and a second layer 2 being a sponge made of a synthetic material. The first layer 1 has a first side 1 a and a second side 1 b, with at least one of the sides (i.e., side 1 a) having a contoured surface. The side 1 b is smooth. The first side 1 a has a contoured surface that has linear elevations. These can be seen in the upper portion of FIG. 4. The first side 1 a has a compacted film-like surface, with the film-like surface having a higher density than the rest of the first layer 1. The second side 1 b faces the second layer 2. A third layer 3 is also provided that includes an abrasive element. The abrasive element takes the form of a fiber-woven fabric 3 b.
  • In FIGS. 1-4, the sponge which constitutes the second layer 2 can be made of polyester, polyurethane or polyether.
  • The first layer 1 is made of viscose that is manufactured using a method for the continuous production of viscose sponges. This first layer is cut in the longitudinal and/or transverse direction. In the z-direction, i.e., in the direction of its thickness, the first layer 1 is not cut, but preformed.
  • In FIGS. 1-4, the third layer 3 is disposed on the side of the second layer 2, which side faces away from the first layer 1. The second layer 2 is sandwiched between the first layer 1 and the third layer 3.
  • Although not shown in FIGS. 1-4, it is possible for both the first side 1 a and the second side 1 b to have a smooth surface, with the first side 1 a and the second side 1 b having a compacted film-like surface and with the film-like surface having a higher density than the rest of the first layer 1.
  • As to additional useful configurations and advanced embodiments of the teaching according to the present invention, reference is made, on the one hand, to the general part of the description and, on the other hand, to the attached claims.

Claims (11)

1-10. (canceled)
11. A cleaning sponge comprising: a plurality of layers that are connected to one another including a first layer being made of viscose and a second layer being a sponge made of a synthetic material, wherein the first layer has a first side and a second side, with at least one of the first side or the second side having a compacted film-like surface and with the film-like surface having a density higher than a density of the rest of the first layer.
12. The cleaning sponge as in claim 11, wherein at least one of the first side or the second side of the first layer has a contoured surface.
13. The cleaning sponge as in claim 11, wherein the first side of the first layer has a contoured surface that has nub-like elevations.
14. The cleaning sponge as in claim 11, wherein the first side of the first layer has a contoured surface that has linear elevations.
15. The cleaning sponge as in claim 11, wherein the second side of the first layer has a contoured surface that has nub-like elevations.
16. The cleaning sponge as in claim 11, wherein the second side of the first layer has a contoured surface that has linear elevations.
17. The cleaning sponge as in claim 11, wherein the second side of the first layer faces the second layer.
18. The cleaning sponge as in claim 11, further comprising a third layer that includes an abrasive element.
19. The cleaning sponge as in claim 18, wherein the abrasive element comprises a fiber-woven fabric.
20. The cleaning sponge as in claim 18, wherein the abrasive element comprises a coating.
US13/812,406 2010-08-12 2011-03-22 Cleaning sponge made of viscose Abandoned US20130125328A1 (en)

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DE102010034193A DE102010034193A1 (en) 2010-08-12 2010-08-12 Cleaning sponge made of viscose
DE102010034193.2 2010-08-12
PCT/EP2011/001418 WO2012019657A1 (en) 2010-08-12 2011-03-22 Cleaning sponge made of viscose

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US20150074932A1 (en) * 2013-09-13 2015-03-19 Jöst Gmbh Cleaning body
US20180029843A1 (en) * 2014-03-12 2018-02-01 Renaelc, Inc. Cleaning Pad and Cleaning Implement

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DE102013226512A1 (en) * 2013-12-18 2015-06-18 Henkel Ag & Co. Kgaa Disposable Spülpad
CN108219502A (en) * 2018-01-31 2018-06-29 陈长飞 A kind of paste compound, environmentally friendly rag preparation method and environmentally friendly rag
US20190313874A1 (en) * 2018-12-31 2019-10-17 Alahandro Olatunde Omotola Scraper sponge

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US20040088810A1 (en) * 2002-11-13 2004-05-13 Julian Britt Multi-purpose utensil cleaning device
US20090276971A1 (en) * 2008-05-07 2009-11-12 3M Innovative Properties Company Cleaning sponge

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US20150074932A1 (en) * 2013-09-13 2015-03-19 Jöst Gmbh Cleaning body
US20180029843A1 (en) * 2014-03-12 2018-02-01 Renaelc, Inc. Cleaning Pad and Cleaning Implement

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EP2603130A1 (en) 2013-06-19
DE102010034193A1 (en) 2012-02-16
WO2012019657A1 (en) 2012-02-16

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