Blister pack

Abstract

A blister ( 10 ) for pharmaceutical products, diagnostic reagents or medical implements includes a blister bottom part ( 12 ), which is thermoformed from plastic, of a covering foil ( 16 ) made of aluminum or of an aluminum/plastic composite, and includes an undersealing trough ( 18 ), which is sealed against the rear side of the blister bottom part ( 12 ) and which is cold-formed from an aluminum/plastic composite film. The aluminum/plastic composite film of the undersealing trough ( 18 ) includes, on the side oriented toward the blister bottom part ( 12 ), a peelable heat-sealable layer that includes a paint having an application weight ranging from 2 to 20 g/m 2 , preferably 7 to 15 g/m 2 , a peelable plastic film having a film thickness ranging from 10 to 40 μm, preferably from 15 to 30 μm, or a peelable plastic coating having an application weight ranging from 5 to 40 g/m 2 , preferably 7 to 20 g/m 2 . The undersealing trough ( 18 ) that can be removed from the blister bottom part ( 12 ) by peeling permits the product contained inside the blister ( 10 ) to be seen. In order to achieve an optimal storage quality of the product even after the aluminum/plastic composite film of the undersealing trough has been removed, the plastic of the bottom part is a barrier with a passage blocking effect against water vapor and/or gases.

1 . A blister pack for pharmaceutical products, diagnostic products or medical devices, comprising a blister base part ( 12 ) thermoformed from plastics material, a cover film ( 16 ) made of aluminum or an aluminum/plastics material composite and a lower sealing tray ( 18 ), which is sealed against the rear of the blister base part ( 12 ) and cold-formed from an aluminum/plastics material composite film, the aluminum/plastics material composite film of the lower sealing tray ( 18 ) has, on the side directed toward the blister base part ( 12 ), a peelable heat-sealing layer made of lacquer with an application weight of 2 to 20 g/m 2 , a peelable plastics material film with a film thickness of 10 to 40 μm, or a peelable plastics material coating with an application weight of 5 to 40 g/m 2 .  
     
     
         2 . The blister pack according to  claim 1 , wherein the peelable heat-sealing layer consists of a lacquer with an application weight of 7 to 15 g/m 2 .  
     
     
         3 . The blister pack according to  claim 1 , wherein the peelable plastics material film has a film thickness of 15 to 30 μm.  
     
     
         4 . The blister pack according to  claim 1 , wherein the peelable plastics material coating has an application weight of 7 to 20 g/m 2 .  
     
     
         5 . The blister pack according to  claim 4 , wherein the plastics material of the blister base part ( 12 ) has a barrier with a penetration barrier effect against steam and/or gases.  
     
     
         6 . The blister pack according to  claim 5 , wherein the blister base part ( 12 ) is constructed from a laminate with the layer sequence PVC/PVDC, PVC/PE/PVDC, PVC/PCTFE, PVC/PE/PCTFE, PVC/PCTFE/PVC. PVC/PE, PVC/COC/PE, PVC/COC/PVC, PVC/COC/PVDC, PVC/COC/PP, PVC/COC/PE. PVC/COC, PP/PVDC, PP/PCTFE, PP/PCTFE/PP, PP/COC/PP, PP/PET, PP/PE, PP/COC/PE, PP/COC/PCTFE, PP/COC, PET/PP/PVDC, PET/COC/PP, PET/COC/PVC, PET/COC/PVDC, PET/COC/PE, PET/PVC/PCTFE, PET/COC, PE/PCTFE, HDPE/PVDC, HDPE/PVC, PE/PCTFE/PE, PE/COC/PVDC, PE/COC, or from LCP, HDPE, PP, PVC or PET containing LCP.  
     
     
         7 . The blister pack according to  claim 6 , wherein the aluminum/plastics material composite film of the lower sealing tray ( 18 ), which can be peeled from the rear of the blister base part ( 12 ), is an aluminum film with a thickness of 15 to 80 μm, which, on the side pointing away from the blister base part ( 12 ), is laminated with a plastics material film made of oriented polyamide (oPA), polyethylene terephthalate (PET) or oriented polypropylene (oPP) with a film thickness of 10 to 30 μm, or is lacquered with a protective lacquer based on the lacquer raw materials, nitrocellulose, epoxy resin, polyester, polyurethane or mixtures of said lacquer raw materials with an application weight of 1 to 20 g/m 2 .  
     
     
         8 . The blister pack according to  claim 7 , wherein the peelable heat-sealing layer which is directed toward the rear of the blister base part ( 12 ) is constructed with the same or similar chemical base components as the plastics material of the blister base part ( 12 ) forming the sealing face, or mixtures of these base components with materials which bring about an adhesive or cohesive break.  
     
     
         9 . The blister pack according to  claim 8 , wherein the lacquer contains, as materials which bring about an adhesive or cohesive break, acrylates, polybutylates, Morprime, styrene acrylate with polyolefin groups, PVC/AC with acrylate, PP/butadiene or polyester/butadiene/styrene.  
     
     
         10 . The blister pack according to any  claim 9 , wherein the peelable plastics material film which is directed toward the rear of the blister base part ( 12 ) or the peelable plastics material coating which is directed toward the rear of the blister base part ( 12 ) is constructed on the basis of PVC, PP, metallocene PP, PE, metallocene PE, PCTFE, PET, EM, ionomers of PE and PE acrylates, EVA and copolymers with EVA.  
     
     
         11 . The blister pack according to  claim 10 , wherein the peelable plastics material film is extruded, coextruded or lacquer-laminated with a peelable coating.  
     
     
         12 . The blister pack according to  claim 10 , wherein the plastics material coating is coextruded with a peelable layer.  
     
     
         13 . The blister pack according to  claim 1 , wherein the peelable plastic material film has a film thickness of 15 to 30 μm, or the peelable plastics material coating has an application weight of 7 to 20 g/m 2 .  
     
     
         14 . The blister pack according to  claim 1 , wherein the plastics material of the blister base part ( 12 ) has a barrier with a penetration barrier effect against steam and/or gases.  
     
     
         15 . The blister pack according to  claim 5 , wherein the blister base part ( 12 ) is constructed from a laminate with the layer sequence PVC/PVDC, PVC/PE/PVDC, PVC/PCTFE, PVC/PE/PCTFE, PVC/PCTFE/PVC, PVC/PE, PVC/COC/PE, PVC/COC/PVC, PVC/COC/PVDC, PVC/COC/PP, PVC/COC/PE, PVC/COC, PP/PVDC, PP/PCTFE, PP/PCTFE/PP, PP/COC/PP, PP/PET, PP/PE, PP/COC/PE, PP/COC/PCTFE, PP/COC, PET/PP/PVDC, PET/COC/PP, PET/COC/PVC, PET/COC/PVDC, PET/COC/PE, PET/PVC/PCTFE, PET/COC, PE/PCTFE, HDPE/PVDC, HDPE/PVC, PE/PCTFE/PE, PE/COC/PVDC, PE/COC or from LCP, HDPE, PP, PVC OR PET containing LCP.  
     
     
         16 . The blister pack according to  claim 1 , wherein the aluminum/plastics material composite film of the lower sealing tray ( 18 ), which can be peeled from the rear of the blister base part ( 12 ), is an aluminum film with a thickness of 15 to 80 μm, which, on the side pointing away from the blister base part ( 12 ), is laminated with a plastics material film made of oriented polyamide (oPA), polyethylene terephthalate (PET) or oriented polypropylene (oPP) with a film thickness of 10 to 30 μm, or is lacquered with a protective lacquer based on the lacquer raw materials, nitrocellulose, epoxy resin, polyester, polyurethane or mixtures of said lacquer raw materials with an application weight of 1 to 20 g/m 2 .  
     
     
         17 . The blister pack according to  claim 1 , wherein the peelable heat-sealing layer which is directed toward the rear of the blister base part ( 12 ) is constructed with the same or similar chemical base components as the plastics material of the blister base part ( 12 ) forming the sealing face, or mixtures of these base components with materials which bring about an adhesive or cohesive break.  
     
     
         18 . The blister pack according to  claim 17 , wherein the lacquer contains, as materials which bring about an adhesive or cohesive break, acrylates, polybutylates, Morprime, styrene acrylate with polyolefin groups, PVC/AC with acrylate, PP/butadiene or polyester/butadiene/styrene.  
     
     
         19 . The blister pack according to  claim 1 , wherein the peelable plastics material film which is directed toward the rear of the blister base part ( 12 ) or the peelable plastics material coating which is directed toward the rear of the blister base part ( 12 ) is constructed on the basis of PVC, PP, metallocene PP, PE, metallocene PE, PCTFE, PET, EM, ionomers of PE and PE acrylates, EVA and copolymers with EVA.  
     
     
         20 . The blister pack according to  claim 19 , wherein the peelable plastics material film is extruded, coextruded or lacquer-laminated with a peelable coating.  
     
     
         21 . The blister pack according to  claim 19 , wherein the plastics material coating is coextruded with a peelable layer.  
     
     
         22 . The blister pack according to  claim 7 , wherein the aluminum film has a thickness of 25 to 60 μm.  
     
     
         23 . The blister pack according to  claim 7 , wherein the plastics material film has a thickness of 15 to 25 μm.  
     
     
         24 . The blister pack according to  claim 7 , wherein the protective lacquer has a thickness of 7 to 15 g/m 2 .  
     
     
         26 . The blister pack according to  claim 16 , wherein the aluminum film has a thickness of 25 to 60 μm.  
     
     
         27 . The blister pack according to  claim 16 , wherein the plastic material film has a thickness of 15 to 25 μm.  
     
     
         28 . The blister pack according to  claim 16 , wherein the protective lacquer has a thickness of 7 to 15 g/m 2 .