Claims
- 1. An abrasive article comprising:
- (a) a loop backing material having a from and back surface, wherein the loop backing material is untreated and unsealed;
- (b) a make coat layer laminated onto the front surface of the loop backing material; and
- (c) a plurality of abrasive grains adhered to the make coat, wherein the make coat seals the front surface of the loop backing material.
- 2. The abrasive article according to claim 1 wherein the loop backing material has a Gurley porosity of less than 50 seconds when measured according to FTMS N. 191, Method 5452 (12/31/68) prior to lamination of the make coat layer.
- 3. The abrasive article according to claim 1 wherein the make coat layer is selected from the group consisting of phenolic resins, aminoplast resins having pendant .alpha.,.beta.-unsaturated carbonyl groups, urethane resins, epoxy resins, acrylate resins, acrylated-isocyanurate resins, polyurethanes, urea-formaldehyde resins, polyesters, isocyanurate resins, acrylated-urethane resins, acrylated-epoxy resins and mixtures thereof.
- 4. The abrasive article according to claim 1 wherein the make coat layer is a hot-melt coatable pressure sensitive adhesive containing an energy curable component.
- 5. The abrasive article according to claim 1 further including a backsize coating on the back surface of the loop backing material.
- 6. The abrasive article according to claim 1 further comprising a size coat overlying the make coat layer and plurality of abrasive particles.
- 7. The abrasive article according to claim 6 wherein the size coat is selected from the group consisting of phenolic resins, aminoplast resin having pendant .alpha.,.beta.-unsaturated carbonyl groups, polyester, urethane resins, epoxy resins, acrylate resins, acrylated-isocyanurate resins, urea-formaldehyde resins, polyurethanes, isocyanurate resins, acrylated-urethane resins, acrylated-epoxy resins and mixtures thereof.
- 8. The abrasive article according to claim 7 further comprising a supersize coat overlying the size coat.
- 9. The abrasive article according to claim 7 wherein the supersize coat comprises zinc stearate with an organic binder.
- 10. A method for making an abrasive article comprising the steps:
- (a) providing loop backing material having a front and back surface, wherein loop backing material is untreated and unsealed;
- (b) providing a make coat precursor that has been independently cured to a non-flowable state at room temperature;
- (c) laminating the make coat precursor to the front surface of the loop backing material;
- (d) applying a plurality of abrasive grains onto the make coat precursor; and
- (e) curing the make coat precursor.
- 11. The method according to claim 10 wherein the make coat precursor is a hot melt coatable, pressure sensitive adhesive coated onto a release liner.
- 12. The method according to claim 10 wherein the make coat precursor is a solution coated, free standing film.
- 13. The method according to claim 10 wherein the make coat precursor is an extruded free standing film.
- 14. The method according to claim 10 wherein the make coat precursor is a moisture cured polyurethane.
- 15. The method according to claim 10 wherein the make coat precursor contains an energy activated initiator.
- 16. The method according to claim 15 further including activating the energy activated initiator (1) prior to the laminating step, (2) after the laminating step but prior to application of the abrasive particles, or (3) after applying the abrasive grains.
- 17. The method according to claim 10 further including applying pressure to the make coat precursor simultaneously while laminating the make coat precursor to the loop backing material.
- 18. The method according to claim 10 further including applying pressure to the make coat precursor after laminating the make coat precursor to the loop backing material.
- 19. The method according to claim 10 further comprising the step of applying a size coat precursor over the plurality of abrasive grains and the make coat.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of application Ser. No. 08/166,550 filed Dec. 14, 1993, now abandoned, which is a continuation-in-part of Ser. No. 013/138,766, filed Oct. 19, 1993 now abandoned.
US Referenced Citations (31)
Foreign Referenced Citations (1)
Number |
Date |
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0465351A1 |
Jan 1992 |
EPX |
Continuations (1)
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Number |
Date |
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Parent |
166550 |
Dec 1993 |
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Continuation in Parts (1)
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Number |
Date |
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138766 |
Oct 1993 |
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