Bulk bag liner with relief valve

Abstract

A bulk bag liner comprising a sidewall forming an enclosure having at least one relief valve mounted in the sidewall thereof for expelling excess gas from within the enclosure so as to prevent elevated pressure within the enclosure and reduce the chance that the liner will rupture.

1 . A bulk bag liner comprising:
 a sidewall formed from a fluid impermeable material and having a top and a bottom end;   the sidewall defining an enclosure;   an inlet spout in fluid communication with the enclosure, the inlet spout positioned at the top end thereof;   at least one relief valve mounted in the sidewall substantially near the inlet spout and comprising means for expelling gas from the enclosure and means for preventing particulate matter from passing through the valve.   
   
   
       2 . The bulk bag liner according to  claim 1  further comprising an outlet spout positioned at the bottom end of the sidewall, the outlet spout in fluid communication with the enclosure. 
   
   
       3 . The bulk bag liner according to  claim 1  wherein the means for expelling gas from the enclosure comprises a plurality of vents perforated in a housing comprising the valve. 
   
   
       4 . The bulk bag liner according to  claim 1  wherein the means for expelling gas from the enclosure comprises a plurality of vents perforated in the film beneath and within the perimeter of the valve. 
   
   
       5 . The bulk bag liner according to  claim 1  wherein the means for preventing particulate matter from passing through the valve comprises a filter. 
   
   
       6 . A bulk bag liner comprising:
 a sidewall having a top and a bottom end, the sidewall formed from a multi-layer film comprising a fluid impermeable layer, at least one reinforcing layer, and at least one sealing layer;   the sidewall defining an enclosure;   an inlet spout in fluid communication with the enclosure, the inlet spout positioned at the top end thereof;   at least one relief valve mounted in the sidewall substantially near the inlet spout and comprising means for expelling gas from the enclosure and means for preventing particulate matter from passing through the valve.   
   
   
       7 . The bulk bag liner according to  claim 6  further comprising an outlet spout positioned at the bottom end of the sidewall, the outlet spout in fluid communication with the enclosure. 
   
   
       8 . The bulk bag liner according to  claim 6  wherein the means for expelling gas from the enclosure comprises a plurality of vents perforated in a housing comprising the valve. 
   
   
       9 . The bulk bag liner according to  claim 6  wherein the means for expelling gas from the enclosure comprises a plurality of vents perforated in the film beneath and within the perimeter of the valve. 
   
   
       10 . The bulk bag liner according to  claim 6  wherein the means for preventing particulate matter from passing through the valve comprises a filter. 
   
   
       11 . The bulk bag liner according to  claim 6  wherein the fluid impermeable layer comprises aluminum foil. 
   
   
       12 . The bulk bag liner according to  claim 6  wherein the fluid impermeable layer comprises linear low-density polyethylene. 
   
   
       13 . The bulk bag liner according to  claim 6  wherein at least of the reinforcing layers comprises polyethylene terephthalate. 
   
   
       14 . The bulk bag liner according to  claim 6  wherein at least one of the sealing layers comprises high-density polyethylene. 
   
   
       15 . The bulk bag liner according to  claim 6  wherein at least one of the sealing layers comprises low-density polyethylene. 
   
   
       16 . The bulk bag liner according to  claim 6  wherein at least one of the sealing layers comprises linear low-density polyethylene.