Blister package for adhesive compositions

Abstract

There is disclosed a novel sandwich blister package for adhesive composition products and similar articles which generally experience short shelf lives due to exposure to air, vapors, and other environmental elements. The package comprises a plastic film blister having heat-formed cavities which contain the product; and a laminated blister card superimposed upon and sealed to the plastic film blister to form an air, water, and vapor-proof blister package assembly of a predetermined size and shape that significantly extends shelf life of the adhesive composition product.

1 . A blister package for an adhesive composition product, said package comprising: 
 a blister card portion including a base layer and a foil layer laminated onto the base layer, the foil layer being of sufficient thickness to serve as an effective barrier to substantially prevent the transmission of air and moisture through the blister card; and    a blister portion having a substantially flat perimeter edge, said blister portion including at least one cavity containing an adhesive composition product packaged in a primary container; and    the blister card portion and the blister portion mated and sealed together to form a substantially airtight and water-resistant package.    
   
   
       2 . A blister package according to  claim 1  wherein the blister is comprised of a thin sheet of plastic material, and wherein the at least one cavity is formed in the blister prior to placing the product in the at least one cavity.  
   
   
       3 . A blister package according to  claim 2 , wherein the thin sheet of plastic material is comprised of polyvinyl chloride, polyvinylidine chloride, polyethylene, polypropylene, polyolefin, fluoroplastics, and combinations thereof.  
   
   
       4 . The blister package according to  claim 3 , wherein the thin sheet of plastic material is between about 0.005 inches and about 0.008 inches in thickness.  
   
   
       5 . A blister package according to  claim 1  wherein foil layer is comprised of material selected from the group consisting of aluminum, tin.  
   
   
       6 . A blister package according to  claim 5 , wherein the thickness of the foil layer is in the range of from about 0.003 to about 0.005 inches.  
   
   
       7 . A blister package according to  claim 5 , wherein the blister card further includes a sealing layer disposed on the exposed surface of the foil layer.  
   
   
       8 . A blister package according to  claim 7 , wherein the sealing layer is disposed on at least the portion of the exposed surface of the foil layer that corresponds to the substantially flat perimeter edge of the blister when the blister and blister card are assembled.  
   
   
       9 . A blister package according to  claim 7 , wherein the sealing layer is disposed on the entire exposed surface of the foil layer.  
   
   
       10 . The blister package of  claim 7  wherein the sealing layer is comprised of a heat-sealable plastic.  
   
   
       11 . The blister package of  claim 7  wherein the sealing layer is comprised of an adhesive material.  
   
   
       12 . The blister package of  claim 10  wherein the heat sealable plastic comprises polyethylene.  
   
   
       13 . A blister package according to  claim 1  wherein said foil layer further includes graphics superimposed on the exposed surface of the foil layer, and wherein said blister is comprised of transparent material such that the graphics superimposed on the exposed surface of the foil layer are visible through the blister.  
   
   
       14 . A blister package according to  claim 1  wherein the adhesive composition product is selected from the group consisting of round glue sticks and wide glue sticks.  
   
   
       15 . A blister package for an adhesive stick material, said package comprising: 
 a blister card portion including a base layer and a foil layer laminated onto the base layer, the foil layer being comprised of aluminum of sufficient thickness to serve as an effective barrier to substantially prevent the transmission of air and moisture through the blister card;    a blister portion comprised of a transparent plastic material and having a substantially flat perimeter edge, said blister portion including at least one cavity containing an adhesive composition packaged in a primary container; and    the blister card portion and the blister portion mated and sealed together by a sealing layer disposed between the substantially flat perimeter edge of the blister and the foil layer to form a substantially airtight and water-resistant package.    
   
   
       16 . A method of significantly prolonging the useful shelf life of an adhesive glue stick composition packaged in a primary container, the method comprised of the steps of 
 Providing a sheet of heat-formable plastic material;    Forming the sheet of heat-formable plastic material so as to create at least one cavity portion surrounded by a substantially flat perimeter edge portion;    Providing an adhesive composition product packaged in a primary container;    Placing the product into the at least one cavity;    Providing a blister card portion, the blister card portion comprised of a base layer having a substantially flat perimeter portion, a foil layer laminated over at least the substantially flat perimeter portion of the blister card;    Superimposing the blister card over the blister so that the substantially flat perimeter edge portion of the blister is mated to the foil layer overlying substantially flat perimeter portion of the blister card; and    Sealing the blister to the blister card to produce a substantially airtight secondary package that substantially increases the shelf life of the product.    
   
   
       17 . The method of  claim 16 , wherein the step of providing an adhesive composition packaged in a primary container includes providing a glue stick packaged in a primary plastic dispensing container.  
   
   
       18 . The method of  claim 16 , wherein the step of sealing includes providing a sealing layer disposed over the exposed surface of the foil layer.  
   
   
       19 . The method of  claim 18 , wherein the step of providing a sealing layer includes providing a heat-sealable plastic material comprised of polyethylene.  
   
   
       20 . The method of  claim 19 , wherein the step of providing a sealing layer includes providing an adhesive composition suited for permanently bonding the foil layer to the blister.