Multilayer container package

Abstract

A multilayer container including an outer relatively rigid plastic layer having a body portion, a finish defining an opening and a base having an atmospheric vent opening therethrough. The container includes an inner flexible plastic layer of relative thin flexible material throughout which does not adhere to the outer plastic layer. The inner flexible layer has a closed bottom portion engaging the inner surface of the finish of the outer plastic layer and a radially extending flange portion of the inner layer overlying the finish of the outer layer. The outer layer preferably comprises an olefin and the inner layer preferably comprises amorphous nylon. The method of making the multilayer container includes coextruding a parison comprising the relatively thick outer layer of plastic material and the relatively thin inner layer of plastic material, closing molds about the parison, blow molding the parison to form the outer rigid plastic layer having a body portion, the finish defining an opening, and the base and the inner flexible layer of relatively thin flexible material.

1 . A multilayer container that comprises: 
 inner and outer layers that are coextruded and blow molded simultaneously with each other,    said outer layer being a relatively rigid plastic layer having a body portion, a finish having an axial end surrounding a dispensing opening, and a base having an atmospheric vent opening formed by removal of material from said base after blow molding,    said inner layer being a relatively thin flexible plastic layer that extends around an inner surface of said outer layer and is unadhered to said outer layer,    said inner flexible layer being of uniform thickness throughout, having a portion that overlies said vent opening, and having a portion engaging the inner surface of said finish and a radially extending flange portion overlying an axial edge of said finish.    
   
   
       2 . The multilayer container set forth in  claim 1  wherein said flange portion of said inner layer entirely overlies the end of said finish of said outer layer and terminates at an outer edge of said finish.  
   
   
       3 . The multilayer container set forth in  claim 2  wherein said portion of said inner layer engaging said finish and overlying said finish is unadhered to said finish.  
   
   
       4 . The multilayer container set forth in  claim 3  wherein said outer plastic layer comprises olefinic plastic and said inner flexible layer comprises amorphous nylon.  
   
   
       5 . The multilayer container set forth in  claim 4  wherein said olefinic plastic comprises high density polyethylene.  
   
   
       6 . The multilayer container set forth in  claim 2  including a product in said container, and a closure, and a dispenser on said finish of said outer layer such that the flange portion of the inner flexible container forms a seal with the closure.