EP1107850A2 - Revetement de feuille de support resistant au recoquillement pour papier abrasif - Google Patents
Revetement de feuille de support resistant au recoquillement pour papier abrasifInfo
- Publication number
- EP1107850A2 EP1107850A2 EP99965888A EP99965888A EP1107850A2 EP 1107850 A2 EP1107850 A2 EP 1107850A2 EP 99965888 A EP99965888 A EP 99965888A EP 99965888 A EP99965888 A EP 99965888A EP 1107850 A2 EP1107850 A2 EP 1107850A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- curl
- resistant
- latex polymer
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
Abstract
L'invention concerne une couche de support résistant au recoquillement pour papier abrasif comprenant un polymère de latex exempt d'agent tensioactif, filmogène, et contenant un groupe carboxy. Le polymère de latex peut être dispersé dans une solution d'ammoniac ou d'amine et la couche de support résistant au recoquillement peut contenir un agent de réticulation. L'invention concerne aussi une feuille de support abrasif résistant au recoquillement comprenant un papier renforcé au polymère présentant une première surface et une seconde surface ; une couche polymère synthétique liée à la première surface et une couche polymère de latex exempte d'agent tensioactif, filmogène et contenant un groupe carboxy liée à la seconde surface. L'invention concerne en outre un papier abrasif résistant au recoquillement comprenant un papier renforcé au polymère présentant une première surface et une seconde surface ; une couche polymère synthétique liée à la première surface ; une couche de particules abrasives liée à la couche polymère synthétique ; et une couche polymère de latex exempte d'agent tensioactif, filmogène et contenant un groupe carboxy liée à la seconde surface. Dans le support abrasif et dans le papier abrasif, le polymère de latex peut être dispersé dans une solution d'ammoniac ou d'amine et la couche polymère de latex peut contenir un agent de réticulation. La couche peut aussi contenir des particules qui lui confèrent des propriétés antiglissantes.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US141053 | 1980-04-17 | ||
US14105398A | 1998-08-27 | 1998-08-27 | |
PCT/US1999/027875 WO2000015389A2 (fr) | 1998-08-27 | 1999-08-27 | Revetement de feuille de support resistant au recoquillement pour papier abrasif |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1107850A2 true EP1107850A2 (fr) | 2001-06-20 |
Family
ID=22493956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99965888A Withdrawn EP1107850A2 (fr) | 1998-08-27 | 1999-08-27 | Revetement de feuille de support resistant au recoquillement pour papier abrasif |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1107850A2 (fr) |
AU (1) | AU2156500A (fr) |
CA (1) | CA2337431A1 (fr) |
WO (1) | WO2000015389A2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014006822B4 (de) | 2014-05-08 | 2016-03-03 | Neenah Gessner Gmbh | Schleifmittelträger und Schleifmittelträger mit mindestens zwei Lagen eines Trägermaterials sowie daraus hergestellter Schleifartikel |
EP4084931A4 (fr) * | 2019-12-31 | 2024-01-10 | Saint-gobain Abrasives, Inc | Couche arrière rigide pour empêcher un gondolage de disque de fibre |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL176020C (nl) * | 1974-09-13 | 1985-02-01 | Oce Van Der Grinten Nv | Werkwijze voor het vervaardigen van diazotypkopieen, alsmede diazotypmateriaal voor het uitvoeren van deze werkwijze. |
US4113900A (en) * | 1977-02-17 | 1978-09-12 | Lawton William R | Curl-resistant adhesive-coated paper |
AU621878B2 (en) * | 1988-06-02 | 1992-03-26 | Norton Company | Web with finishing coating useful as coated abrasive backing |
-
1999
- 1999-08-27 EP EP99965888A patent/EP1107850A2/fr not_active Withdrawn
- 1999-08-27 WO PCT/US1999/027875 patent/WO2000015389A2/fr not_active Application Discontinuation
- 1999-08-27 CA CA002337431A patent/CA2337431A1/fr not_active Abandoned
- 1999-08-27 AU AU21565/00A patent/AU2156500A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0015389A3 * |
Also Published As
Publication number | Publication date |
---|---|
CA2337431A1 (fr) | 2000-03-23 |
WO2000015389A2 (fr) | 2000-03-23 |
AU2156500A (en) | 2000-04-03 |
WO2000015389A3 (fr) | 2000-05-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20010207 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: KIMBERLY-CLARK WORLDWIDE, INC. |
|
17Q | First examination report despatched |
Effective date: 20011206 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20020317 |