Packaging material

Abstract

A packaging material includes: a pair of clam shells; a plurality of welding portions provided at marginal portions of the pair of clam shells and welded to each other with a product contained between the pair of clam shells in a sandwiched state; and a cutout formed in a part of at least either of the pair of clam shells surrounding the welding portions.

1 . A packaging material comprising:
 a pair of clam shells;   a plurality of welding portions provided at marginal portions of the pair of clam shells and welded to each other with a product contained between the pair of clam shells in a sandwiched state; and   a cutout formed in a part of at least either of the pair of clam shells surrounding the welding portions.   
     
     
         2 . A packaging material according to  claim 1 , wherein the cutout is formed on a side of the part surrounding the welding portions facing toward a section for containing a product. 
     
     
         3 . A packaging material according to  claim 2 , wherein the welding portions of the pair of clam shells are configured in a concavo-convexo mating structure. 
     
     
         4 . A packaging material according to  claim 3 , wherein perforations are formed in another part of the clam shell surrounding the welding portions. 
     
     
         5 . A packaging material according to  claim 2 , further comprising an inner clam shell which is a clam shell contained between the pair of clam shells and which is formed with a containing section for containing the product. 
     
     
         6 . A packaging material according to  claim 5 , wherein the pair of clam shells and the inner clam shell are molded in a shape in which they are integrally connected. 
     
     
         7 . A packaging material according to  claim 6 , wherein
 a hole is formed on either of the pair of clam shells; and   the other of the pair of clam shells is welded to the inner clam shell at the hole.