CA1302097C - Method of making an abrasive product - Google Patents
Method of making an abrasive productInfo
- Publication number
- CA1302097C CA1302097C CA000552387A CA552387A CA1302097C CA 1302097 C CA1302097 C CA 1302097C CA 000552387 A CA000552387 A CA 000552387A CA 552387 A CA552387 A CA 552387A CA 1302097 C CA1302097 C CA 1302097C
- Authority
- CA
- Canada
- Prior art keywords
- fabric
- resin
- abrasive
- abrasive product
- deposits
- 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.)
- Expired - Lifetime
Links
Landscapes
- Polishing Bodies And Polishing Tools (AREA)
Abstract
ABSTRACT
In a method of making an abrasive product wherein a multitude of abrasive bearing metal deposits are applied to a backing fabric, the backing fabric is coated with a copolyester elastomeric resin. The fabric is preferably made of polyaramid yarn.
In a method of making an abrasive product wherein a multitude of abrasive bearing metal deposits are applied to a backing fabric, the backing fabric is coated with a copolyester elastomeric resin. The fabric is preferably made of polyaramid yarn.
Description
~3~
This invention relates to a method of making an abrasive product wherein a multitude of abrasive-bearing metal deposits are applied to a backing fabric. C~al' Such a method is described in ou~ copending,tapplication No. 518,201 filed on September 15, 1986 and subsequent C~nc~c~-n application Nos. 530,811 filed on February 27, 1987, 542,562 filed on July 21, 19~7, and 549,901 filed on October 21, 1987.
The metal deposits can be applied directly to the backing fabric or through the intermediary of a supporting mesh, as described in our first above-referenced application. The advantage of applying the depvsits directly to the backing fabric is that the intermediate step of bonding the mesh to the backing fabric can be eliminated.
.
In one method, which involves rendering the backing fabric conductive by electroless plating or a copper spray, the abrasive-bearing deposits are electrolytically formed through a mask on the conductive coating. The use of a polyaramid backing fabric, in particular PPDT (poly~p-phenylene) terephlthalamide), fabric has special advantages. Directly upon removal from the electrolytic tank, the fabric can be cut into strips and formed into belts ready for use. Such belts have exceptional strength and abrasive properties, particularly when the abrasive particles are diamond.
Advantageous though it is to employ a polyaramid backing of fabric, one of the problems with polyaramid yarn is that its decomposition temperature is lower than its melting point. When the sheet is removed from the electrolytic tank and cut into strips, there i5 no convenient means to prevent the fabric strips from fraying at the edges during use.
Additionally, even though the fabric has exceptional strength qualities, the fabric is subject to degradation by scuffing in 13~iZ~t~'7 high speed operation.
The spray-coated fabric provides a rough surface on which to deposit the mask. In some applications this can be undesirable since it can lead to the conductive fibres breaking through the mask with the result that deposition occurs in areas covered by the mask.
An object of the invention is to alleviate the aforementioned disadvantages.
In accordance with the first aspect of the invention there is provided in a method of making an abrasive product wherein a multitude of abrasive-bearing metal deposits are applied to a backing fabric, the improvement wherein the backing fabric is coated with a copolyester elastomeric resin.
Preferably, a copper foil is bonded to the backing fabric with the copolyester resin to provide the conductive base for the electrolytic deposition of the metal deposits.
A copolyester elastomeric resin will withstand the rigors of heavy industrial use and maintain the integrity of the belt without substantially impairing its flexibility. The preferred resin is LOMODTM (a trade mark of the General Electric Company).
The LOMODTM resin is preferably applied to a polyaramid, especially a (poly(p-phenylene)terephlthalamide) fabric since it is found to work particularly well with this material, giving greatly improved performance.
Preferably, the voids between the upstanding deposits are filled with resin such as polyurethane resin after removal of the mask and etching away of the exposed copper foil.
A further aspect of the invention provides an abrasive product comprising a fabric carrying a multitude of abrasive-bearing metal deposits, said fabric being coated with acopolyester resin.
The invention will now be described in more detail by way of the accompanying example.
`~ A sheet of Barrday F-2160/175 Kevlar 29-1500 dernier s~coured fabric was impregnated with BO8~0 LOMODTM copolyester elastomeric resin. The resin was in liquid form and applied with rollers. A layer of copper foil was then applied to the impregnated sheet and the assembly maintained in a press under 250 psi pressure for approximately one hour at room temperature.
Upon removal from the press, a plastisol mask with a multitude of openings was then applied to the copper foil, in the manner described in our copending application Serial No. 518,201 filed on September 15, 1986, and the laminate then placed in an electrilytic deposition bath as described in that application.
Nickel was deposited onto the copper foil through the openings in the mask with diamond particles added during the deposition phase.
The mask was stripped from the foil and the intervening copper etched away to leave upstanding diamond bearing nickel deposits lying on small copper discs. The voids between the nickel deposits were then filled with a flexible polyurethane resin, such as Bostik 7070, so that the abrasive product presents a continuous surface on the abrasive side. This has the important advantage that during use the tendency of the deposits to be chipped off the backing fabric is minimized. Other flexible resins can be employed.
The LOMODTM resin substantially enhances the properties of the fabric. It prevents degradation of the fabric due to fraying and scuffing during heaving industrial use without impairing the flexibility of the belt. ~t has good physical, 1 3 {~
mechanical, thermal, electrical and flame-resistant properties.
Of equal significance is the fact that the LOMODTM has sufficient strength to permit lamination of the copper foil to the fabric. The advantage of this technique is that unlike copper sprayed foil the laminated foil ha~ a smooth surface. The uniformity of the abrasive can be accurately controlled and the tendency of the electrolytic depos~ts to break through the masked portions is minimized.
The physical data for these LOMODTM resins are as follows:
LOMOD LOMOD
Property B0800 B0852 Specific Gravity1.23 1.30 Flexural Modulus,psi 85,000 95,000 Tensile Strength,psi 3,350 3,475 Tensile Elongation,~
Q Break Z50 125 Dielectric Strength 415 405 Belts, discs and other types of abrasive product made with LOMODTM impregnated sheets in the manner described have exceptional strength and abrasive properties.
This invention relates to a method of making an abrasive product wherein a multitude of abrasive-bearing metal deposits are applied to a backing fabric. C~al' Such a method is described in ou~ copending,tapplication No. 518,201 filed on September 15, 1986 and subsequent C~nc~c~-n application Nos. 530,811 filed on February 27, 1987, 542,562 filed on July 21, 19~7, and 549,901 filed on October 21, 1987.
The metal deposits can be applied directly to the backing fabric or through the intermediary of a supporting mesh, as described in our first above-referenced application. The advantage of applying the depvsits directly to the backing fabric is that the intermediate step of bonding the mesh to the backing fabric can be eliminated.
.
In one method, which involves rendering the backing fabric conductive by electroless plating or a copper spray, the abrasive-bearing deposits are electrolytically formed through a mask on the conductive coating. The use of a polyaramid backing fabric, in particular PPDT (poly~p-phenylene) terephlthalamide), fabric has special advantages. Directly upon removal from the electrolytic tank, the fabric can be cut into strips and formed into belts ready for use. Such belts have exceptional strength and abrasive properties, particularly when the abrasive particles are diamond.
Advantageous though it is to employ a polyaramid backing of fabric, one of the problems with polyaramid yarn is that its decomposition temperature is lower than its melting point. When the sheet is removed from the electrolytic tank and cut into strips, there i5 no convenient means to prevent the fabric strips from fraying at the edges during use.
Additionally, even though the fabric has exceptional strength qualities, the fabric is subject to degradation by scuffing in 13~iZ~t~'7 high speed operation.
The spray-coated fabric provides a rough surface on which to deposit the mask. In some applications this can be undesirable since it can lead to the conductive fibres breaking through the mask with the result that deposition occurs in areas covered by the mask.
An object of the invention is to alleviate the aforementioned disadvantages.
In accordance with the first aspect of the invention there is provided in a method of making an abrasive product wherein a multitude of abrasive-bearing metal deposits are applied to a backing fabric, the improvement wherein the backing fabric is coated with a copolyester elastomeric resin.
Preferably, a copper foil is bonded to the backing fabric with the copolyester resin to provide the conductive base for the electrolytic deposition of the metal deposits.
A copolyester elastomeric resin will withstand the rigors of heavy industrial use and maintain the integrity of the belt without substantially impairing its flexibility. The preferred resin is LOMODTM (a trade mark of the General Electric Company).
The LOMODTM resin is preferably applied to a polyaramid, especially a (poly(p-phenylene)terephlthalamide) fabric since it is found to work particularly well with this material, giving greatly improved performance.
Preferably, the voids between the upstanding deposits are filled with resin such as polyurethane resin after removal of the mask and etching away of the exposed copper foil.
A further aspect of the invention provides an abrasive product comprising a fabric carrying a multitude of abrasive-bearing metal deposits, said fabric being coated with acopolyester resin.
The invention will now be described in more detail by way of the accompanying example.
`~ A sheet of Barrday F-2160/175 Kevlar 29-1500 dernier s~coured fabric was impregnated with BO8~0 LOMODTM copolyester elastomeric resin. The resin was in liquid form and applied with rollers. A layer of copper foil was then applied to the impregnated sheet and the assembly maintained in a press under 250 psi pressure for approximately one hour at room temperature.
Upon removal from the press, a plastisol mask with a multitude of openings was then applied to the copper foil, in the manner described in our copending application Serial No. 518,201 filed on September 15, 1986, and the laminate then placed in an electrilytic deposition bath as described in that application.
Nickel was deposited onto the copper foil through the openings in the mask with diamond particles added during the deposition phase.
The mask was stripped from the foil and the intervening copper etched away to leave upstanding diamond bearing nickel deposits lying on small copper discs. The voids between the nickel deposits were then filled with a flexible polyurethane resin, such as Bostik 7070, so that the abrasive product presents a continuous surface on the abrasive side. This has the important advantage that during use the tendency of the deposits to be chipped off the backing fabric is minimized. Other flexible resins can be employed.
The LOMODTM resin substantially enhances the properties of the fabric. It prevents degradation of the fabric due to fraying and scuffing during heaving industrial use without impairing the flexibility of the belt. ~t has good physical, 1 3 {~
mechanical, thermal, electrical and flame-resistant properties.
Of equal significance is the fact that the LOMODTM has sufficient strength to permit lamination of the copper foil to the fabric. The advantage of this technique is that unlike copper sprayed foil the laminated foil ha~ a smooth surface. The uniformity of the abrasive can be accurately controlled and the tendency of the electrolytic depos~ts to break through the masked portions is minimized.
The physical data for these LOMODTM resins are as follows:
LOMOD LOMOD
Property B0800 B0852 Specific Gravity1.23 1.30 Flexural Modulus,psi 85,000 95,000 Tensile Strength,psi 3,350 3,475 Tensile Elongation,~
Q Break Z50 125 Dielectric Strength 415 405 Belts, discs and other types of abrasive product made with LOMODTM impregnated sheets in the manner described have exceptional strength and abrasive properties.
Claims (15)
1. In a method of making an abrasive product wherein a multitude of abrasive-bearing metal deposits are applied to a backing fabric, the improvement wherein the backing fabric is coated with a copolyester elastomeric resin.
2. A method as claimed in claim 1 wherein said fabric is made of polyaramid yarn.
3. A method as claimed in claim 1 wherein the polyaramid is PPDT poly(p-phenylene)terephlthalamide.
4. A method as claimed in claim 1 or 2 wherein the fabric is impregnated with said resin.
5. A method as claimed in claim 1 wherein a conductive foil is bonded to the fabric with said copolyester resin under pressure.
6, A method as claimed in claim 5 wherein the conductive foil is copper.
7. A method as claimed in claim 6 wherein said voids between the metal deposits are filled with flexible resin.
8. A method as claimed in claim 7 wherein said flexible resin is a polyurethane resin.
9. A method as claimed in claim 1, 2 or 3 where said resin is LOMOD TM.
10. An abrasive product comprising a fabric carrying a multitude of abrasive-bearing metal deposits, said fabric being coated with a copolyester resin.
11. An abrasive product as claimed in claim 10 wherein said fabric is made of polyaramid yarn.
12. An abrasive product as claimed in claim 11 wherein said polyaramid is poly(p-phenylene)terephlthalamide.
13. An abrasive product as claimed in claim 11 wherein said fabric is impregnated with said resin.
14. An abrasive product as claimed in claim 10 wherein said deposits are formed on a conductive foil bonded to said fabric with said copolyester resin.
15. An abrasive product comprising a multitude of upstanding abrasive-bearing metal deposits carried on a backing sheet with the voids between the deposits filled with a flexible resin.
Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000552387A CA1302097C (en) | 1987-11-20 | 1987-11-20 | Method of making an abrasive product |
| AU12157/88A AU1215788A (en) | 1987-02-27 | 1988-02-24 | Flexible abrasives |
| FI880894A FI880894A (en) | 1987-02-27 | 1988-02-25 | BOEJLIGA SLIPMEDEL. |
| DK099288A DK99288A (en) | 1987-02-27 | 1988-02-25 | GRINDING TOPIC |
| EP88810118A EP0280657B2 (en) | 1987-02-27 | 1988-02-26 | Flexible abrasives |
| JP63044072A JPS6458480A (en) | 1987-02-27 | 1988-02-26 | Abrasive member and manufacture thereof |
| BR888800891A BR8800891A (en) | 1987-02-27 | 1988-02-26 | METHOD OF MAKING A FLEXIBLE ABRASIVE ELEMENT AND FLEXIBLE ABRASIVE ELEMENT |
| DE3883403T DE3883403T3 (en) | 1987-02-27 | 1988-02-26 | Flexible abrasives. |
| AU12356/88A AU613895B2 (en) | 1987-02-27 | 1988-02-26 | Flexible abrasives |
| AT88810118T ATE93438T1 (en) | 1987-02-27 | 1988-02-26 | FLEXIBLE ABRASIVES. |
| CN88101108A CN88101108A (en) | 1986-09-15 | 1988-02-27 | Flexible abrasives |
| KR1019880002114A KR880009734A (en) | 1987-02-27 | 1988-02-27 | Flexible abrasive member, abrasive and molding method |
| NO880876A NO880876L (en) | 1987-02-27 | 1988-02-29 | FLEXIBLE GRINDING ELEMENT AND PROCEDURE FOR MANUFACTURING A GRINDING ELEMENT. |
| US07/161,940 US4874478A (en) | 1987-02-27 | 1988-02-29 | Method of forming a flexible abrasive |
| US07/398,335 US5066312A (en) | 1987-02-27 | 1989-08-25 | Flexible abrasives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000552387A CA1302097C (en) | 1987-11-20 | 1987-11-20 | Method of making an abrasive product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1302097C true CA1302097C (en) | 1992-06-02 |
Family
ID=4136887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000552387A Expired - Lifetime CA1302097C (en) | 1986-09-15 | 1987-11-20 | Method of making an abrasive product |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1302097C (en) |
-
1987
- 1987-11-20 CA CA000552387A patent/CA1302097C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |