WO2000015389A2 - Curl-resistant backside coating layer for abrasive paper - Google Patents
Curl-resistant backside coating layer for abrasive paper Download PDFInfo
- Publication number
- WO2000015389A2 WO2000015389A2 PCT/US1999/027875 US9927875W WO0015389A2 WO 2000015389 A2 WO2000015389 A2 WO 2000015389A2 US 9927875 W US9927875 W US 9927875W WO 0015389 A2 WO0015389 A2 WO 0015389A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- curl
- resistant
- latex polymer
- paper
- Prior art date
Links
Classifications
-
- 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
-
- 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
- B24D11/001—Manufacture of flexible abrasive materials
- B24D11/005—Making abrasive webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
Definitions
- the present invention relates to an abrasive substrate. More particularly, the present invention relates to a latex-impregnated paper intended for use as an abrasive backing.
- Latex saturation The reinforcement of paper by latex polymer impregnation (commonly referred to as latex saturation) is a long-established practice.
- the polymer employed typically is a synthetic material, most often a latex, and the paper may consist solely of cellulosic fibers or of a mixture of cellulosic and noncellulosic fibers.
- Polymer reinforcement is employed to improve one or more of such properties as dimensional stability, resistance to chemical and environmental degradation, resistance to tearing, embossability, resiliency, conformability, moisture and vapor transmission, and abrasion resistance, among others.
- Latex saturated papers typically have been used as label print stock, base substrates for abrasive papers, and similar applications where strength is an essential requirement.
- backside coatings for abrasive papers provide antislip properties when wet, some degree of water repellency, and perhaps some curl prevention. Nevertheless, there still is an opportunity for improved curl resistance in backside coatings for abrasive papers.
- the present invention addresses some of the difficulties and problems discussed above by providing a curl-resistant backside layer for an abrasive paper which includes a surfactant-free, film-forming, carboxy group-containing latex polymer.
- the latex polymer may be ammonia- or amine-dispersed.
- the curl-resistant backside layer additionally may contain a crosslinking agent. It also may contain particles such as silica or diatomaceous earth particles to provide antislip properties.
- the present invention also provides a curl-resistant abrasive backing which includes a polymer-reinforced paper having a first surface and a second surface; a synthetic polymeric layer bonded to the first surface; and a surfactant-free, film-forming, carboxy group-containing latex polymer layer bonded to the second surface.
- the latex polymer may be ammonia- or amine-dispersed and the latex polymer layer may contain a crosslinking agent.
- Such layer also may contain particles as described above.
- the present invention further provides a curl-resistant abrasive paper which includes a polymer-reinforced paper having a first surface and a second surface; a synthetic polymeric layer bonded to the first surface; a layer of abrasive particles bonded to the synthetic polymer layer; and a surfactant-free, film-forming, carboxy group-containing latex polymer layer bonded to the second surface.
- the latex polymer may be ammonia- or amine- dispersed and the latex polymer layer may contain a crosslinking agent. It also may contain particles which provide antislip properties, such as silica and diatomaceous earth particles, and the like.
- backside layer refers to a layer or coating on the backside of an abrasive paper, i.e., the side of the abrasive paper which does not have the layer of abrasive particles thereon.
- abrasive backing is used herein to mean a paper, typically a polymer- reinforced paper, which is intended to be provided with a layer of abrasive particles.
- abrasive paper refers to the combination of an abrasive backing and a layer of abrasive particles.
- the term "paper” is meant to include any web or sheet-like material which contains at least about 50 percent by weight of cellulosic fibers.
- the web may contain other natural fibers, synthetic fibers, or mixtures thereof.
- Cellulosic nonwoven webs may be prepared by air laying or wet laying relatively short fibers to form a web or sheet.
- the term includes sheets prepared from a papermaking furnish.
- Such furnish may include only cellulose fibers or a mixture of cellulose fibers with other natural fibers and/or synthetic fibers.
- the furnish also may contain additives and other materials, such as fillers, e.g., clay and titanium dioxide, surfactants, antifoaming agents, and the like, as is well known in the papermaking art.
- the abrasive paper of the present invention will be prepared from latex-impregnated paper.
- the latex-impregnated paper may be a water leaf sheet of wood pulp fibers or alpha pulp fibers impregnated with a reactive acrylic polymer latex such as Rhoplex ® B-15 (Rohm and Haas Company, Philadelphia, Pennsylvania).
- Rhoplex ® B-15 Rhoplex ® B-15
- any of a number of other latices may be used, if desired, some examples of which are summarized in Table A, which follows. Table A Suitable Latices for Impregnation of Paper
- the impregnating dispersion typically will contain clay and an opacifier such as titanium dioxide. Exemplary amounts of these two materials are 16 parts and 4 parts, respectively, per 100 parts of polymer on a dry weight basis.
- the first layer may have a basis weight of 13.3 lbs/1300 ft 2 (50 g/m 2 ) before impregnation.
- the impregnated paper generally may contain impregnant in a range of from about 5 to about 50 percent by weight, on a dry weight basis, although in some cases higher levels of impregnant in the paper may be suitable.
- the paper may contain 18 parts impregnating solids per 100 parts fiber by weight, and may have a basis weight of 15.6 lbs/1300 ft 2 (58 g/m 2 ), both on a dry weight basis.
- a suitable caliper is 3.8 ⁇ 0.3 mil (97 ⁇ 8 micrometers).
- the curl-resistant backside layer of the present invention includes a surfactant-free, film-forming, carboxy group-containing latex polymer.
- the layer generally is water-resistant; that is, a film of the polymer absorbs little or no water upon being immersed.
- the latex polymer may be ammonia- or amine-dispersed.
- the latex polymer may be an acrylic polymer.
- the latex polymer may be an ammonia-dispersed acrylic polymer.
- the latex polymer may be a dispersible poly(vinyl acetate).
- the curl-resistant backside layer additionally may contain a crosslinking agent.
- crosslinking agents examples include polyfucntional aziridine oligomers.
- the crosslinking agent may be present, by way of example, in an amount of from about 1 to about 15 percent by weight, based on the amount of the latex polymer. As another example, the crosslinking agent may be present in an amount of from about 2 to about 10 percent by weight.
- the curl-resistant backside layer also may contain particles such as silica or diatomaceous earth particles to provide antislip properties. While such particles, if present, typically will be inorganic particles, particles of organic materials also may be employed. Exemplary of inorganic particles are the following: silica; clay; calcium carbonate; talc; barium sulfate; diatomaceous earth; titanium dioxide; alumina; aluminum silicate; calcium silicate; kaolin; magnesium silicate; magnesium oxalate; magnesium-calcium carbonate; magnesium oxide; and magnesium hydroxide. Such particles generally may be present in an amount sufficient to impart antislip properties to the backside layer.
- the particles may be present in an amount of from about 1 to about 50 percent, based on the amount of the carboxy group-containing latex polymer. As another example, the particles may be present in an amount of from about 5 to about 30 percent by weight. As a further example, the particles may be present in an amount of from about 5 to about 15 percent by weight.
- the present invention also provides a curl-resistant abrasive backing which includes a polymer-reinforced paper having a first surface and a second surface; a synthetic polymeric layer bonded to the first surface; and a surfactant-free, film-forming, carboxy group-containing latex polymer layer bonded to the second surface.
- the latex polymer may be ammonia- or amine-dispersed and the latex polymer layer may contain a crosslinking agent and particles as described above.
- the present invention further provides a curl-resistant abrasive paper which includes a polymer-reinforced paper having a first surface and a second surface; a synthetic polymeric layer bonded to the first surface; a layer of abrasive particles bonded to the synthetic polymer layer; and a surfactant-free, film-forming, carboxy group-containing latex polymer layer bonded to the second surface.
- the latex polymer may be ammonia- or amine- dispersed and the latex polymer layer may contain a crosslinking agent and particles, again as described above.
- the paper used in this example was a commercially available saturated paper (Type S-91082 or Duraflex Dark Olive Waterproof Paper, Kimberly-Clark Corporation, Roswell, Georgia). Sheet size was 8.5 x 11 inches (about 22 x 28 cm). The paper contained 97 percent by weight recycled wood pulp fibers and 3 percent by weight polyester fibers having a denier of 3 and a length of 0.25 inch (about 6.4 mm). The basis weight of the paper before saturation was 87 grams per square meter (gsm). The saturant was a styrene-butadiene rubber latex and was present at a level sufficient to give the saturated paper a basis weight of 110 gsm.
- One side (the first side) of the paper was coated by means of extrusion casting with a 0.5-mil (about 6.4-mm) thick polyethylene layer to give an abrasive backing.
- the polyethylene layer is water resistant, while the paper itself can absorb water and expand. This differential expansion results in curl when the paper is wet.
- the other side (the second side) of the paper was coated with two different dispersions.
- the first, Dispersion A had a solids content of 27 percent by weight.
- the dispersion consisted of 100 dry parts of an acrylic latex (Hycar ® 26672, B. F. Goodrich Company, Cleveland, Ohio), 10 dry parts of a diatomaceous earth silica (Celite ® 263, (Manville Products Corporation, Denver, Colorado), and 10 dry parts of a polyfunctional aziridine crosslinking agent (Xama-7 ® , B. F. Goodrich Company, Cleveland, OH).
- the dry coating weight was 15 gsm.
- Dispersion B was similar to Dispersion A, except the Hycar ® 26672 was replaced with a like amount of an ammonia-dispersed ethylene-acrylic acid copolymer (Michem ® Prime 4983, Michelman, Inc., Cincinnati, Ohio).
- the coating weight from Dispersion B was 14 gsm.
- the abrasive backing i.e., the sheet lacking a backside coating, curled immediately and curled into a tube having about two complete circles of paper.
- the sample having a backside coating of Dispersion A remained fairly flat for about 2 hours, then slowly curled into a tube having about 1.5 circles of paper after 24 hours.
- the sample having a backside coating of Dispersion B remained flat for about 8 hours, then slowly curled into a tube having about 0.25 circle of paper after 24 hours.
- the sample having a backside coating of Dispersion B was notably stiffer than either the sample having a backside coating of Dispersion A or lacking a backside coating.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99965888A EP1107850A2 (en) | 1998-08-27 | 1999-08-27 | Curl-resistant backside coating layer for abrasive paper |
CA002337431A CA2337431A1 (en) | 1998-08-27 | 1999-08-27 | Curl-resistant backside coating layer for abrasive paper |
AU21565/00A AU2156500A (en) | 1998-08-27 | 1999-08-27 | Curl-resistant backside coating layer for abrasive paper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14105398A | 1998-08-27 | 1998-08-27 | |
US09/141,053 | 1998-08-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000015389A2 true WO2000015389A2 (en) | 2000-03-23 |
WO2000015389A3 WO2000015389A3 (en) | 2000-05-25 |
Family
ID=22493956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/027875 WO2000015389A2 (en) | 1998-08-27 | 1999-08-27 | Curl-resistant backside coating layer for abrasive paper |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1107850A2 (en) |
AU (1) | AU2156500A (en) |
CA (1) | CA2337431A1 (en) |
WO (1) | WO2000015389A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014006822A1 (en) | 2014-05-08 | 2015-11-12 | Neenah Gessner Gmbh | Abrasive carrier and abrasive article made therefrom |
EP4084931A4 (en) * | 2019-12-31 | 2024-01-10 | Saint Gobain Abrasives Inc | Rigid backsize to prevent fiber disc curling |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4113900A (en) * | 1977-02-17 | 1978-09-12 | Lawton William R | Curl-resistant adhesive-coated paper |
US4275137A (en) * | 1974-09-13 | 1981-06-23 | Oce-Van Der Grinten N.V. | Light-sensitive diazotype material |
EP0344529B1 (en) * | 1988-06-02 | 1993-06-23 | Norton Company | Web with finishing coating useful as coated abrasive backing |
-
1999
- 1999-08-27 CA CA002337431A patent/CA2337431A1/en not_active Abandoned
- 1999-08-27 AU AU21565/00A patent/AU2156500A/en not_active Abandoned
- 1999-08-27 EP EP99965888A patent/EP1107850A2/en not_active Withdrawn
- 1999-08-27 WO PCT/US1999/027875 patent/WO2000015389A2/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4275137A (en) * | 1974-09-13 | 1981-06-23 | Oce-Van Der Grinten N.V. | Light-sensitive diazotype material |
US4113900A (en) * | 1977-02-17 | 1978-09-12 | Lawton William R | Curl-resistant adhesive-coated paper |
EP0344529B1 (en) * | 1988-06-02 | 1993-06-23 | Norton Company | Web with finishing coating useful as coated abrasive backing |
US5456975A (en) * | 1988-06-02 | 1995-10-10 | Norton Company | Curl resistant coated abrasive backing with radiation curable cloth finishing additive |
Non-Patent Citations (1)
Title |
---|
See also references of EP1107850A2 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014006822A1 (en) | 2014-05-08 | 2015-11-12 | Neenah Gessner Gmbh | Abrasive carrier and abrasive article made therefrom |
DE102014006822B4 (en) * | 2014-05-08 | 2016-03-03 | Neenah Gessner Gmbh | Abrasive carrier and abrasive carrier having at least two layers of a carrier material and abrasive articles made therefrom |
EP4084931A4 (en) * | 2019-12-31 | 2024-01-10 | Saint Gobain Abrasives Inc | Rigid backsize to prevent fiber disc curling |
Also Published As
Publication number | Publication date |
---|---|
EP1107850A2 (en) | 2001-06-20 |
CA2337431A1 (en) | 2000-03-23 |
AU2156500A (en) | 2000-04-03 |
WO2000015389A3 (en) | 2000-05-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2277348C (en) | Curl-resistant, antislip abrasive backing and paper | |
EP0658650B1 (en) | Polymer-reinforced paper having improved cross-direction tear | |
EP1097044B1 (en) | Coating composition and recording medium | |
US5336348A (en) | Method for forming a vermiculite film | |
US5236778A (en) | Highly filled binder coated fibrous backing sheet | |
EP0663300A1 (en) | Ink jet recording sheet | |
WO2000015389A2 (en) | Curl-resistant backside coating layer for abrasive paper | |
EP2158076A1 (en) | A release product | |
EP1329553B1 (en) | Coated paper for gravure | |
MXPA01001943A (en) | Curl-resistant backside coating layer for abrasive paper | |
JPH1046485A (en) | Coated paper made from mixed glass fiber | |
JPH0849199A (en) | Base paper for wall paper | |
EP0559031B1 (en) | Decorative sheet and method of producing the same | |
JPH08337078A (en) | Antibacterial printing material | |
JP3158087B2 (en) | Non-halogen cushioning flooring | |
JPH11277697A (en) | Release paper | |
JP4540496B2 (en) | Non-woven fabric for offset printing | |
JP2729698B2 (en) | Recording sheet | |
JPH0742096A (en) | Coated paper for decorative laminarte | |
JP3167673B2 (en) | Non-halogen floor material | |
JP3445163B2 (en) | Cover material for passbook and passbook | |
JP4428679B2 (en) | Base paper for decorative sheet | |
JPH10226991A (en) | Moisture-proof paper | |
JP2005256217A (en) | Glass fiber mixed monwoven fabric | |
JP2518765Y2 (en) | Base paper for cosmetics |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
AK | Designated states |
Kind code of ref document: A3 Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
ENP | Entry into the national phase in: |
Ref document number: 2337431 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1999965888 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: PA/a/2001/001943 Country of ref document: MX |
|
WWP | Wipo information: published in national office |
Ref document number: 1999965888 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1999965888 Country of ref document: EP |