Plastic bag with reinforced sides

Abstract

A plastic bag includes a body having two sides. Each side of the body includes a corrugated portion having a layer unit with more than four layers. The load capacity of the plastic bag is increased due to reinforcement in structural strength at the sides by the corrugated portions. In preferred forms, the layer unit of each corrugated portion is interconnected to a bottom of the body. The layer unit of each corrugated portion has eight layers. The layer unit of each corrugated portion includes a recessed portion located inside of the body and having two sections contiguous to each other. Each section has four layers.

1 . A plastic bag comprising:
 a body including two sides each having a corrugated portion, with each of the corrugated portions including a layer unit having more than four layers.   
     
     
         2 . The plastic bag as claimed in  claim 1 , with the body further including a bottom, and with the layer unit of each of the corrugated portions interconnected to the bottom of the body. 
     
     
         3 . The plastic bag as claimed in  claim 1 , with the layer unit of each of the corrugated portions having eight layers. 
     
     
         4 . The plastic bag as claimed in  claim 3 , with the layer unit of each of the corrugated portions including a recessed portion located inside of the body and having two sections contiguous to each other, and with each of the two sections having four layers. 
     
     
         5 . The plastic bag as claimed in  claim 4 , with each of the two sections having W-shaped cross sections. 
     
     
         6 . The plastic bag as claimed in  claim 3 , with the layer unit of each of the corrugated portions including a recessed portion located inside of the body and having two sections contiguous to each other, with each of the two sections including four layers having a plurality of folds.