Packaged abrasive articles and methods for making same

Abstract

An article includes a packaging material comprising a self-supporting wall having a water vapor transfer rate of not greater than 0.001 g/m 2 -day. The packaging material defines an enclosed volume. The article further includes a bonded abrasive article disposed within the enclosed volume. The bonded abrasive article includes abrasive grains dispersed in a polymer matrix. The polymer matrix includes hygroscopic material.

1 . An article comprising:
 a packaging material comprising a self-supporting wall having a water vapor transfer rate of not greater than 0.001 g/m 2 -day, the packaging material defining an enclosed volume; and   a bonded abrasive article disposed within the enclosed volume, the bonded abrasive article comprising abrasive grains dispersed in a polymer matrix, the polymer matrix comprising hygroscopic material.   
     
     
         2 . The article of  claim 1 , wherein the water vapor transfer rate is not greater than 0.0005 g/m 2 -day. 
     
     
         3 . The article of  claim 1 , wherein the polymer matrix is selected from the group consisting of phenolic resin, boron-modified resin, nano-particle-modified resin, urea-formaldehyde resin, acrylic resin, epoxy resin, polybenzoxazine, polyester resin, isocyanurate resin, melamine-formaldehyde resin, polyimide resin, other suitable thermosetting or thermoplastic resins, or any combination thereof. 
     
     
         4 . The article of  claim 3 , wherein the polymer matrix is a phenolic resin. 
     
     
         5 . The article of  claim 1 , wherein the self-supporting wall includes a support material and a barrier material. 
     
     
         6 . The article of  claim 5 , wherein the barrier material comprises polyester. 
     
     
         7 . The article of  claim 5 , wherein the barrier material comprises aluminum foil. 
     
     
         8 . The article of  claim 7 , wherein the aluminum foil has a thickness of at least 1 micron. 
     
     
         9 . The article of  claim 8 , wherein the thickness is at least 100 microns. 
     
     
         10 . (canceled) 
     
     
         11 . The article of  claim 5 , wherein the support material is selected from the group consisting of a thermoplastic material, a cured elastomer, a fibrous material, or any combination thereof. 
     
     
         12 . The article of  claim 11 , wherein the fibrous material includes a pulp material. 
     
     
         13 . (canceled) 
     
     
         14 . The article of  claim 11 , wherein the thermoplastic material includes a polyolefin material. 
     
     
         15 - 16 . (canceled) 
     
     
         17 . The article of  claim 11 , wherein the cured elastomer includes a diene elastomer. 
     
     
         18 - 19 . (canceled) 
     
     
         20 . The article of  claim 1 , wherein the bonded abrasive article exhibits a Relative G-Ratio of at least 0.8 after 12 weeks with external conditions of 40° C. and 80% relative humidity. 
     
     
         21 . The article of  claim 1 , wherein the article has an internal relative humidity not greater than 50% at 20° C. after 25 weeks at 40° C. and 80% relative humidity. 
     
     
         22 . An article comprising:
 a packaging material defining an enclosed volume and formed of a material having a water vapor transfer rate of not greater than 2.0 g/m 2 -day;   a desiccant disposed within the enclosed volume; and   a bonded abrasive article disposed within the enclosed volume, the bonded abrasive article comprising abrasive grains dispersed in a polymer matrix, the polymer matrix comprising hygroscopic material.   
     
     
         23 . The article of  claim 22 , wherein the water vapor transfer rate is not greater than 0.2 g/m 2 -day. 
     
     
         24 . (canceled) 
     
     
         25 . The article of  claim 22 , wherein the water vapor transfer rate is at least 0.001 g/m 2 -day. 
     
     
         26 - 28 . (canceled) 
     
     
         29 . The article of  claim 22 , wherein the desiccant is selected from the group consisting of a metal oxide or hydroxide scavenger, a metal sulfate scavenger, a metal halide scavenger, a metal silicate, other inorganic scavengers, an organometallic scavenger, a metal ligand, organic scavengers, or any combination thereof. 
     
     
         30 . The article of  claim 22 , wherein the desiccant has a capacity of at least 0.4 g H 2 O/g desiccant. 
     
     
         31 - 51 . (canceled)