CA2014601A1 - Absorbent wiper including synthetic fiber abrasive surface - Google Patents
Absorbent wiper including synthetic fiber abrasive surfaceInfo
- Publication number
- CA2014601A1 CA2014601A1 CA 2014601 CA2014601A CA2014601A1 CA 2014601 A1 CA2014601 A1 CA 2014601A1 CA 2014601 CA2014601 CA 2014601 CA 2014601 A CA2014601 A CA 2014601A CA 2014601 A1 CA2014601 A1 CA 2014601A1
- Authority
- CA
- Canada
- Prior art keywords
- web
- composite
- scrim
- nonwoven
- synthetic
- 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.)
- Abandoned
Links
Landscapes
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A composite cleaning product such as a wiper and a method for making that product wherein at least one layer of a nonwoven web of fiber material is joined together in face-to-face relation with a scrim of synthetic fibers; and the fibers of the nonwoven web of fiber material are cause to be wrapped around the strands of the scrim to form a composite web wherein the nonwoven web and scrim are mechanically joined together and such that at least a portion of the strands of the scrim are exposed. The composite web is joined to a web of dry formed nonwoven material to form a composite product having opposite surfaces, the dry formed nonwoven material forming one surface of the composite product and the composite web forming the other surface of the composite product.
A composite cleaning product such as a wiper and a method for making that product wherein at least one layer of a nonwoven web of fiber material is joined together in face-to-face relation with a scrim of synthetic fibers; and the fibers of the nonwoven web of fiber material are cause to be wrapped around the strands of the scrim to form a composite web wherein the nonwoven web and scrim are mechanically joined together and such that at least a portion of the strands of the scrim are exposed. The composite web is joined to a web of dry formed nonwoven material to form a composite product having opposite surfaces, the dry formed nonwoven material forming one surface of the composite product and the composite web forming the other surface of the composite product.
Description
2 ~
ABSORBENT WIPER
INCLUDING SYNTHETIC FIBER ABRASIVE SURFACE
FIELD OF THE INVENTION
The invention relates to absorbent wipers of the type used in cleaning and, more particularly, to wipers which are moisture absorbent and which can be used for scrubbing and soil removal.
BACKGROUND PRIOR ART
Wipers used in cleaning applications such as in restaurants, cafeterias and residential use as well as in industrial or commercial applications should be absorbent, wear resistant and durable, and they should also have a surface which can be used for scrubbing but which is not unduly abrasive. Such wipers should also be inexpensively manufactured so that they can be disposed of after use.
One prior art wiper is comprised of spun bonded nonwoven material having granules fused to the material to form an abrasive surface. Another prior art cleaning product includes a synthetic fiber mesh bag housing a foam core. A
further prior art cleaning product comprises a foam layer surrounded by a fabric material with granules bonded to the outer surface of the abric material to orm an abrasive surface.
Other nonwoven materials used as wipers or cleaning cloths are commonly very soft when they are wet. These materials tend to slide over soil on the surface being cleaned and do not remove the soil from the surface. Other materials that do not absorb moisture and are firmer, such as metal pads, tend to remove the soil from the surface but do not have the ability to pick up and retain the soil, and they do not leave the surface clean.
Fibet scrims have been used in other woven and nonwoven applications, but in those applications the scrim is used as a reinforcing material to increase product strength but does not form an abrasive media.
SUMMARY OF THE INVENTION
The present invention provides a composite cleaning product or wiper which includes one surface comprised of an absorbent material having the ability to pick up soil erom the surface being cleaned and another surface which has abrasive characteristics such that the wiper has the capability of scrubbing or scraping the surface being cleaned but without scratching that surface.
More particularly, the product embodying the invention includes at least one web of nonwoven material such as rayon or a blend of rayon and synthetic fibers laid against a synthetic fiber scrim. In one form of the invention the scrim can be 2 Q ~
comprised of polypropylene or polyester, and the scrim is sandwiched between at least two webs of nonwoven material.
Water jets are directed through the composite web to cause the fibers~of the nonwoven web to wrap around the filaments or strands of the scrim or otherwise become entangled with the filaments or strands of the scrim and such that the nonwoven webs and scrim are mechanically joined together. rn other embodiments of the invention, the nonwoven webs can also be bonded together using a polymeric binder or can be thermally bonded together. The composite web is then laid onto an absorbent air laid or dry formed nonwoven web. The dry formed web can comprise a web of hammermilled wood pulp or a blend of wood pulp and synthetic fibers. This dry formed web can be bonded with a polymeric binder or can be thermally bonded. A
polymeric binder can be applied to the composite web to bind together the composite web including the synthetic fiber scrim and the dry formed web.
The dry formed air laid nonwoven web provides absorbency and a soft surface, while the opposite surface, comprised of the composite web including the synthetic fiber scrim produces a scrubbing surface. The polypropylene or polyester material of the scrim projects from the surface of the composite web and provides an abra-sive character to the wiper. The synthetic fiber scrim included in the composite web also provides for reinforcement of the strength of the material and provides,a long-wearing wiper.
Another feature of the invention is that while the material of the synthetic fiber scrim is sufficiently abrasive 2Q~
that it will provide for removal o soil from a surface, it is not as abrasive as granules or grit and will not scratch the surface being cleaned.
, Various other features and advantages of the invention will be apparent by reference to the following description of a preferred embodi~ent, from the drawings and rom the claims.
BRIEY DESCRIPTION OF THE DRAWINGS
Fig. 1 is an exploded perspective view of a cleaning product embodying the invention.
Fig. 2 is a schematic illustration of a process for use in making the cleaning product illustrated in Fig. 1.
Fig. 3 is a greatly enlarged schematic illustration of the step, included in the process shown in Fig. 2 of joining the nonwoven webs to the synthetic fiber scrim.
Before describing a preferred embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangement set forth in the following description, nor illustrated in the drawings. The invention is capable of further embodiments and of being carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be reqarded as llmiting.
2~6~
Fig. 1 is an exploded view of a cleaning product 10, such as a wiper, embodying the invention, the cleaning product 10 including a scrim 12 of material such as polypropylene or polyester joined to at least one web 14 of a nonwoven material to form a composite web. This composite web is in turn bonded with a web 16 of dry formed absorbent nonwoven cellulosic material. The web 16 of dry formed absorbent nonwoven material forms one surface of the cleaning product. The opposite surface of the cleaning product is formed by the composite web formed of the nonwoven web material 14 and scrim 12. At least a portion of the polypropylene or polyester material of the scrim 12 projects from the surEace of the composite web such that this synthetic material will function as an abrasive. The absorbent material of the dry formed web 16 provides a soft, water absorbent product which will lift soil from a surface being cleaned while the opposite surface of the cleaning product including the synthetic eiber scrim 12 provides an abrasive surface which will loosen the soil such that it can be pulled away from the surface being cleaned.
Fig. 2 illustrates schematically the method of the present invention for forming the cleaning product illustrated in Fig. 1. In the preferred embodiment of the invention, the synthetic fiber scrim 12 is sandwiched between two layers or webs 14 of a nonwoven material. In the preferred form of the invention the nonwoven web material is comprised of rayon, a rayon blend or other cellulosic material and formed using a 2 ~
conventional carding process of the type commonly used in making nonwoven cellulosic fiber materials. The carded web 14 so ormed can be comprised of one and one-half denier rayon, rayon,polyester blends or cotton polyester blends, but should be predominantly formed from an absorbent fiber material. The scrim 12 of polypropylene or polyester material is sandwiched between at least two webs of the carded cellulosic material.
In a preferred form of the invention the two cellulosic webs should have a total weight of about 0.4 ounces per square yard to 1.0 ounces per square yard. The composite product, consisting of the synthetic fiber scrim 12 sandwiched between at least two webs 14, is then passed through an aperturing unit, as illustrated schematically in Fig. 3, wherein high pressure water is sprayed through the webs 14 to form apertures in the webs and to cause the fibers of the webs to twist around or surround the filaments or strands 18 of the scrim and become entangled with the scrim to thereby form a mechanical bond between the two layers of web material and the synthetic fiber scrim. In one form of the invention the composite product of the nonwoven webs and scrim can be passed over a perforated aperturing drum 20 (Fig. 3) wherein water at high pressure is forced through small apertures 22 in the drum and through the web. The composite web is held against the surface of the drum by a woven wire screen 24. Such perforated aperturing drums are conventional and used in other aperturing processes in the manufacture of nonwoven products. Alternatively, the composite web and scrim can be laid onto a woven wire, and water jets can be directed through the web at high pressure to 2 ~
similarly cause the fibers of the web to become entangled with the strands of the synthetic scrim.
Additionally, a binder or adhesive can be applied to at least one of the webs and then cured to provide bonding between the two webs on opposite surfaces of the synthetic fiber scrim. This binder further provides for adherence of the webs together thereby securing the synthetic fiber scrim between the nonwoven webs.
The scrim comprised of the synthetic fiber material can be any synthetic fiber that is not softened by water, being sufficiently abrasive as to be effective as a cleaning product but being sufficiently soft that it will not scratch surfaces being cleaned. In a preferred form of the invention the scrim is comprised of polypropylene or polyester and the count can be approximately six strands in the machine direction and six strands in the cross-machine direction. While the scrim could be produced in other ways, in one embodiment of the invention the scrim is produced by extruding a film of polypropylene including apertures and then stretching that film to form a mesh product. In one preferred emhodiment of the invention the thickness or diameter of the strands of the scrim should be approximately .010 to .035 inches.
In the preferred form of the invention the nonwoven webs should be sufficiently light weight that a substantial portion of the synthetic fiber scrim will be exposed following the aperturing process. If the scrim is not exposed, it will not provide an effective abrasive surface. In a preferred form of the invention the two cellulosic webs should have a total weight of about 0.4 to about 1.0 ounces per square yard. If binder is applied to the two webs surrounding the scrim to bind these two layers together, the webs should have a weight of approximately 0.5 to about 1.25 ounces per square yard.
The composite web comprised of the two nonwoven webs and synthetic fiber scrim are then bonded to a web comprised of a dry formed nonwoven material of the type formed by air laying a web of hammermilled wood pulp or a blend of wood pulp and synthetic fibers. Air laid dry formed nonwoven materials are conventional and are used commonly as tissues or absorbent wipers. In one preferred form of the invention the air laid dry formed material can be comprised of a hammermilled wood pulp bonded by spraying the embossed web with an ethylene vinyl acetate cross linkable adhesive, the product weighing between 20 and 90 pounds per ream. If binder is applied to the two webs surrounding the scrim to bind these two layers together, the webs should have a weight of approximately 0.5 to 1.25 ounces per square yard.
The composite layer comprised of layers of web material and the synthetic scrim is bonded to the air laid dry formed nonwoven material by applying a binder or adhesive to one surface of the composite web and by then laying this surface of the web against a surface of the dry formed nonwoven material. The binder could comprise any conventional binder of the type used in laminating textiles and the like and which is water resistant or cross linkable such that once applied it is resistant to water. For example, the binder can comprise ethylene vinyl acetate, acrylic or butadiene styrene and is applied in the amount of approximately 25 percent of the weight of the composite web material. In other applications the binder can comprise 15 to 45 percent the weight oE the composite web. The binder can be applied to the surface of the composite web by conventional methods for use in adhesive application such as gravure rolls, coating rolls, spray application, powder bonding or by the application of hot melt adhesives.
In one form of the invention the adhesive is applied by print bonding. This provides for a resulting product which is very absorbent because the binder covers a minimum of the Eiber surface while still providing strong adhesion between the webs. In the print bonding process, a latex adhesive or bindèr is applied to one roll of a pair of rolls such that it is printed onto a surface of the composite web material. After the binder is applied, the composite web and the dry formed web can be passed through additional nip rolls wherein the two webs are forced together. The webs are then run through heat cans wherein the webs are subjected to heat oE approximately 260 to 300 degrees Fahrenheit to cause curing of the binder.
In one preEerred Eorm o the invention the air laid dry Eormed material can have a weight oE approximately 20 to 90 pounds per ream.
The resulting product includes one surface comprised of the absorbent dry formed web and a second layer or surface comprised of the composite web including the synthetic scrim.
At least portions of the synthetic scrim project from the composite web so as to provide an abrasive for scrubbing and to 2 ~
provide strength to the composite product so that the composite product is durable even when wet.
The web material bonded to opposite sides of the synthe~ic scrim functions to provide absorbency to the material and also provides a vehicle to permit adhesion of the dry formed material to the synthetic scrim. The synthetic material such as polypropylene will not bind well with a dry forrned material unless the surface of that synthetic material is first treated, for example by corona treating. But corona treating of a scrim or mesh is not practical. By surrounding the fibers of the synthetic scrim with hydrophillic fibers and bonding the scrim into a nonwoven, this composite substrate can be bonded to the dry formed web and produce a resulting product which has high strength properties and resists delamination.
Various features of the invention are set forth in the following claims.
ABSORBENT WIPER
INCLUDING SYNTHETIC FIBER ABRASIVE SURFACE
FIELD OF THE INVENTION
The invention relates to absorbent wipers of the type used in cleaning and, more particularly, to wipers which are moisture absorbent and which can be used for scrubbing and soil removal.
BACKGROUND PRIOR ART
Wipers used in cleaning applications such as in restaurants, cafeterias and residential use as well as in industrial or commercial applications should be absorbent, wear resistant and durable, and they should also have a surface which can be used for scrubbing but which is not unduly abrasive. Such wipers should also be inexpensively manufactured so that they can be disposed of after use.
One prior art wiper is comprised of spun bonded nonwoven material having granules fused to the material to form an abrasive surface. Another prior art cleaning product includes a synthetic fiber mesh bag housing a foam core. A
further prior art cleaning product comprises a foam layer surrounded by a fabric material with granules bonded to the outer surface of the abric material to orm an abrasive surface.
Other nonwoven materials used as wipers or cleaning cloths are commonly very soft when they are wet. These materials tend to slide over soil on the surface being cleaned and do not remove the soil from the surface. Other materials that do not absorb moisture and are firmer, such as metal pads, tend to remove the soil from the surface but do not have the ability to pick up and retain the soil, and they do not leave the surface clean.
Fibet scrims have been used in other woven and nonwoven applications, but in those applications the scrim is used as a reinforcing material to increase product strength but does not form an abrasive media.
SUMMARY OF THE INVENTION
The present invention provides a composite cleaning product or wiper which includes one surface comprised of an absorbent material having the ability to pick up soil erom the surface being cleaned and another surface which has abrasive characteristics such that the wiper has the capability of scrubbing or scraping the surface being cleaned but without scratching that surface.
More particularly, the product embodying the invention includes at least one web of nonwoven material such as rayon or a blend of rayon and synthetic fibers laid against a synthetic fiber scrim. In one form of the invention the scrim can be 2 Q ~
comprised of polypropylene or polyester, and the scrim is sandwiched between at least two webs of nonwoven material.
Water jets are directed through the composite web to cause the fibers~of the nonwoven web to wrap around the filaments or strands of the scrim or otherwise become entangled with the filaments or strands of the scrim and such that the nonwoven webs and scrim are mechanically joined together. rn other embodiments of the invention, the nonwoven webs can also be bonded together using a polymeric binder or can be thermally bonded together. The composite web is then laid onto an absorbent air laid or dry formed nonwoven web. The dry formed web can comprise a web of hammermilled wood pulp or a blend of wood pulp and synthetic fibers. This dry formed web can be bonded with a polymeric binder or can be thermally bonded. A
polymeric binder can be applied to the composite web to bind together the composite web including the synthetic fiber scrim and the dry formed web.
The dry formed air laid nonwoven web provides absorbency and a soft surface, while the opposite surface, comprised of the composite web including the synthetic fiber scrim produces a scrubbing surface. The polypropylene or polyester material of the scrim projects from the surface of the composite web and provides an abra-sive character to the wiper. The synthetic fiber scrim included in the composite web also provides for reinforcement of the strength of the material and provides,a long-wearing wiper.
Another feature of the invention is that while the material of the synthetic fiber scrim is sufficiently abrasive 2Q~
that it will provide for removal o soil from a surface, it is not as abrasive as granules or grit and will not scratch the surface being cleaned.
, Various other features and advantages of the invention will be apparent by reference to the following description of a preferred embodi~ent, from the drawings and rom the claims.
BRIEY DESCRIPTION OF THE DRAWINGS
Fig. 1 is an exploded perspective view of a cleaning product embodying the invention.
Fig. 2 is a schematic illustration of a process for use in making the cleaning product illustrated in Fig. 1.
Fig. 3 is a greatly enlarged schematic illustration of the step, included in the process shown in Fig. 2 of joining the nonwoven webs to the synthetic fiber scrim.
Before describing a preferred embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangement set forth in the following description, nor illustrated in the drawings. The invention is capable of further embodiments and of being carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be reqarded as llmiting.
2~6~
Fig. 1 is an exploded view of a cleaning product 10, such as a wiper, embodying the invention, the cleaning product 10 including a scrim 12 of material such as polypropylene or polyester joined to at least one web 14 of a nonwoven material to form a composite web. This composite web is in turn bonded with a web 16 of dry formed absorbent nonwoven cellulosic material. The web 16 of dry formed absorbent nonwoven material forms one surface of the cleaning product. The opposite surface of the cleaning product is formed by the composite web formed of the nonwoven web material 14 and scrim 12. At least a portion of the polypropylene or polyester material of the scrim 12 projects from the surEace of the composite web such that this synthetic material will function as an abrasive. The absorbent material of the dry formed web 16 provides a soft, water absorbent product which will lift soil from a surface being cleaned while the opposite surface of the cleaning product including the synthetic eiber scrim 12 provides an abrasive surface which will loosen the soil such that it can be pulled away from the surface being cleaned.
Fig. 2 illustrates schematically the method of the present invention for forming the cleaning product illustrated in Fig. 1. In the preferred embodiment of the invention, the synthetic fiber scrim 12 is sandwiched between two layers or webs 14 of a nonwoven material. In the preferred form of the invention the nonwoven web material is comprised of rayon, a rayon blend or other cellulosic material and formed using a 2 ~
conventional carding process of the type commonly used in making nonwoven cellulosic fiber materials. The carded web 14 so ormed can be comprised of one and one-half denier rayon, rayon,polyester blends or cotton polyester blends, but should be predominantly formed from an absorbent fiber material. The scrim 12 of polypropylene or polyester material is sandwiched between at least two webs of the carded cellulosic material.
In a preferred form of the invention the two cellulosic webs should have a total weight of about 0.4 ounces per square yard to 1.0 ounces per square yard. The composite product, consisting of the synthetic fiber scrim 12 sandwiched between at least two webs 14, is then passed through an aperturing unit, as illustrated schematically in Fig. 3, wherein high pressure water is sprayed through the webs 14 to form apertures in the webs and to cause the fibers of the webs to twist around or surround the filaments or strands 18 of the scrim and become entangled with the scrim to thereby form a mechanical bond between the two layers of web material and the synthetic fiber scrim. In one form of the invention the composite product of the nonwoven webs and scrim can be passed over a perforated aperturing drum 20 (Fig. 3) wherein water at high pressure is forced through small apertures 22 in the drum and through the web. The composite web is held against the surface of the drum by a woven wire screen 24. Such perforated aperturing drums are conventional and used in other aperturing processes in the manufacture of nonwoven products. Alternatively, the composite web and scrim can be laid onto a woven wire, and water jets can be directed through the web at high pressure to 2 ~
similarly cause the fibers of the web to become entangled with the strands of the synthetic scrim.
Additionally, a binder or adhesive can be applied to at least one of the webs and then cured to provide bonding between the two webs on opposite surfaces of the synthetic fiber scrim. This binder further provides for adherence of the webs together thereby securing the synthetic fiber scrim between the nonwoven webs.
The scrim comprised of the synthetic fiber material can be any synthetic fiber that is not softened by water, being sufficiently abrasive as to be effective as a cleaning product but being sufficiently soft that it will not scratch surfaces being cleaned. In a preferred form of the invention the scrim is comprised of polypropylene or polyester and the count can be approximately six strands in the machine direction and six strands in the cross-machine direction. While the scrim could be produced in other ways, in one embodiment of the invention the scrim is produced by extruding a film of polypropylene including apertures and then stretching that film to form a mesh product. In one preferred emhodiment of the invention the thickness or diameter of the strands of the scrim should be approximately .010 to .035 inches.
In the preferred form of the invention the nonwoven webs should be sufficiently light weight that a substantial portion of the synthetic fiber scrim will be exposed following the aperturing process. If the scrim is not exposed, it will not provide an effective abrasive surface. In a preferred form of the invention the two cellulosic webs should have a total weight of about 0.4 to about 1.0 ounces per square yard. If binder is applied to the two webs surrounding the scrim to bind these two layers together, the webs should have a weight of approximately 0.5 to about 1.25 ounces per square yard.
The composite web comprised of the two nonwoven webs and synthetic fiber scrim are then bonded to a web comprised of a dry formed nonwoven material of the type formed by air laying a web of hammermilled wood pulp or a blend of wood pulp and synthetic fibers. Air laid dry formed nonwoven materials are conventional and are used commonly as tissues or absorbent wipers. In one preferred form of the invention the air laid dry formed material can be comprised of a hammermilled wood pulp bonded by spraying the embossed web with an ethylene vinyl acetate cross linkable adhesive, the product weighing between 20 and 90 pounds per ream. If binder is applied to the two webs surrounding the scrim to bind these two layers together, the webs should have a weight of approximately 0.5 to 1.25 ounces per square yard.
The composite layer comprised of layers of web material and the synthetic scrim is bonded to the air laid dry formed nonwoven material by applying a binder or adhesive to one surface of the composite web and by then laying this surface of the web against a surface of the dry formed nonwoven material. The binder could comprise any conventional binder of the type used in laminating textiles and the like and which is water resistant or cross linkable such that once applied it is resistant to water. For example, the binder can comprise ethylene vinyl acetate, acrylic or butadiene styrene and is applied in the amount of approximately 25 percent of the weight of the composite web material. In other applications the binder can comprise 15 to 45 percent the weight oE the composite web. The binder can be applied to the surface of the composite web by conventional methods for use in adhesive application such as gravure rolls, coating rolls, spray application, powder bonding or by the application of hot melt adhesives.
In one form of the invention the adhesive is applied by print bonding. This provides for a resulting product which is very absorbent because the binder covers a minimum of the Eiber surface while still providing strong adhesion between the webs. In the print bonding process, a latex adhesive or bindèr is applied to one roll of a pair of rolls such that it is printed onto a surface of the composite web material. After the binder is applied, the composite web and the dry formed web can be passed through additional nip rolls wherein the two webs are forced together. The webs are then run through heat cans wherein the webs are subjected to heat oE approximately 260 to 300 degrees Fahrenheit to cause curing of the binder.
In one preEerred Eorm o the invention the air laid dry Eormed material can have a weight oE approximately 20 to 90 pounds per ream.
The resulting product includes one surface comprised of the absorbent dry formed web and a second layer or surface comprised of the composite web including the synthetic scrim.
At least portions of the synthetic scrim project from the composite web so as to provide an abrasive for scrubbing and to 2 ~
provide strength to the composite product so that the composite product is durable even when wet.
The web material bonded to opposite sides of the synthe~ic scrim functions to provide absorbency to the material and also provides a vehicle to permit adhesion of the dry formed material to the synthetic scrim. The synthetic material such as polypropylene will not bind well with a dry forrned material unless the surface of that synthetic material is first treated, for example by corona treating. But corona treating of a scrim or mesh is not practical. By surrounding the fibers of the synthetic scrim with hydrophillic fibers and bonding the scrim into a nonwoven, this composite substrate can be bonded to the dry formed web and produce a resulting product which has high strength properties and resists delamination.
Various features of the invention are set forth in the following claims.
Claims (16)
1. A method for making a composite cleaning product comprising the steps of:
laying a nonwoven web of iber material together in face-to-face relation with a scrim of synthetic material having strands;
causing fibers of the nonwoven web of fiber material to be wrapped around the strands of the scrim to form a composite web wherein the nonwoven web and scrim are mechanically joined together and such that at least a portion of the strands of the scrim of synthetic material are exposed;
joining the composite web to a web of dry formed nonwoven material to form a composite product having opposite surfaces and such that the dry formed nonwoven material forms one surface of the composite product and the composite web forms the other surface of the composite product.
laying a nonwoven web of iber material together in face-to-face relation with a scrim of synthetic material having strands;
causing fibers of the nonwoven web of fiber material to be wrapped around the strands of the scrim to form a composite web wherein the nonwoven web and scrim are mechanically joined together and such that at least a portion of the strands of the scrim of synthetic material are exposed;
joining the composite web to a web of dry formed nonwoven material to form a composite product having opposite surfaces and such that the dry formed nonwoven material forms one surface of the composite product and the composite web forms the other surface of the composite product.
2. A method as set forth in Claim 1 wherein the step of laying the nonwoven web of fiber material together in face to face relation with the scrim of synthetic material includes sandwiching the scrim material between two webs of nonwoven fiber material.
3. A method as set forth in Claim 1 wherein the step of causing the fibers of the web to be wrapped around the strands of the scrim includes forming apertures in the composite web by forcing water through the composite web.
4. A method as set forth in Claim 3 wherein the step of forcing water through the web includes supporting the composite web on a perforated aperturing roll.
5. A method as set forth in Claim 3 wherein the step of forcing water through the web includes supporting the composite web on a wire screen and forcing water through the composite web supported by the wire screen.
6. A method as set forth in Claim 1 wherein at least portions of the synthetic strands of the scrim project from the other surface of the composite product to form an abrasive surface.
7. A method as set forth in Claim 1 wherein the step of joining the composite web and the dry formed web includes the step of applying binder to the surface of at least one of the composite web and the dry formed web, forcing the composite web and dry formed web together and bonding the webs.
8. A method as set forth in Claim 7 wherein the step of applying binder includes print bonding binder onto a surface of one of the composite web and the dry formed web, pressing the dry formed web and composite web together and heating the dry formed web and composite web to adhere the webs and cure the binder.
9. A composite cleaning product comprising:
a composite web including at least one web of nonwoven fiber material bonded to a synthetic scrim including strands, said at least one web of nonwoven fiber materials including fibers entangled with strands of the synthetic scrim to form a mechanical bond between said one web and said synthetic scrim, and the composite web having opposite surfaces, and at least a portion of the strands of the synthetic scrim projecting from at least one of the surfaces of the composite web and;
an absorbent dry formed nonwoven web bonded to the other surface of the composite web.
a composite web including at least one web of nonwoven fiber material bonded to a synthetic scrim including strands, said at least one web of nonwoven fiber materials including fibers entangled with strands of the synthetic scrim to form a mechanical bond between said one web and said synthetic scrim, and the composite web having opposite surfaces, and at least a portion of the strands of the synthetic scrim projecting from at least one of the surfaces of the composite web and;
an absorbent dry formed nonwoven web bonded to the other surface of the composite web.
10. A composite cleaning product as set forth in claim 9 wherein the composite web includes at least two nonwoven webs of fiber materials, the synthetic scrim being sandwiched between the layers of nonwoven fiber material.
11. A composite cleaning product as set forth in Claim 9 wherein the fibers of the nonwoven fiber material web are entangled with the strands of the synthetic scrim to bond the nonwoven web of fiber material to the synthetic scrim.
12. A composite cleaning product as set forth in Claim 9 wherein the composite web is apertured to entangle the fibers of the nonwoven web of fiber material with the strands of the synthetic scrim whereby the nonwoven web is bonded to the synthetic scrim.
13. A composite cleaning product as set forth in Claim 9 wherein the nonwoven web of fiber material includes rayon fibers and has a weight of between 0.4 and 1.0 ounces per square yard.
14. A composite cleaning product as set forth in Claim 9 wherein the synthetic scrim is comprised of polypropylene.
15. A composite cleaning product as set forth in Claim 9 wherein the thickness of the synthetic scrim is between .010 to .035 inches.
16. A composite cleaning product as set forth in Claim 9 wherein the synthetic scrim is comprised of polyester.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37199289A | 1989-06-27 | 1989-06-27 | |
| US371,992 | 1989-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2014601A1 true CA2014601A1 (en) | 1990-12-27 |
Family
ID=23466261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2014601 Abandoned CA2014601A1 (en) | 1989-06-27 | 1990-04-12 | Absorbent wiper including synthetic fiber abrasive surface |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2014601A1 (en) |
-
1990
- 1990-04-12 CA CA 2014601 patent/CA2014601A1/en not_active Abandoned
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