Child resistant blister package

Abstract

An improved child-resistant blister package is provided in which the lidding component includes a tear-resistant nonwoven layer with a thermally resistant layer adhered thereto and a barrier layer.

1 . A blister package comprising a blister component having an inner surface and an outer surface and a multi-layer lidding component having an inner surface and an outer surface, wherein selected portions of the inner surface of the blister component and inner surface of the lidding component are adhered together to form at least one cavity therebetween, the blister component comprising a first barrier layer selected from the group consisting of polymeric films, coated polymeric films, metal foils, and film-foil laminates, and the lidding component comprising a second barrier layer, a nonwoven layer comprising at least one melt-spun continuous filament nonwoven sheet and a thermally resistant layer. 
   
   
       2 . A blister package according to  claim 1 , wherein the second barrier layer comprises a sheet layer selected from the group consisting of polymeric films, coated polymeric films, metalized polymeric films, and metal foils. 
   
   
       3 . A blister package according to  claim 2 , wherein the lidding component further comprises an adhesive tie layer intermediate, the second barrier layer, and the nonwoven layer with the thermally resistant layer adhered to the side of the nonwoven layer opposite the adhesive tie layer, and a heat-seal layer adhered to the side of the second barrier layer opposite the adhesive tie layer, such that the inner surface of the lidding component comprises the heat-seal layer and the outer surface of the lidding component comprises the thermally resistant layer, and wherein the lidding and blister components are heat sealed to each other to form a seal therebetween. 
   
   
       4 . A blister package according to  claim 3 , wherein the heat-seal layer comprises a heat-sealable sealant selected from the group consisting of poly(vinylidene chloride), vinyl/acrylic compositions, blends of polyolefin resins comprising ethylene vinyl acetate copolymers, blends of polyolefin resins comprising ethylene methyl acrylate copolymers, and polyester-based compositions. 
   
   
       5 . A blister package according to  claim 3 , wherein the tie-layer comprises an adhesive composition selected from the group consisting of vinyl/acrylic compositions, blends of polyolefin resins comprising ethylene vinyl acetate copolymers, blends of polyolefin resins comprising ethylene methyl acrylate copolymers, ethylene vinyl acetate resins, ethylene methyl acrylate resins, and polyester-based polyurethanes. 
   
   
       6 . A blister package according to  claim 3 , wherein the second barrier layer comprises a frangible sheet layer selected from the group consisting of frangible polymeric films and frangible metal foils. 
   
   
       7 . A blister package according to  claim 1  or  3 , wherein the thermally resistant layer comprises a binder composition selected from the group consisting of cellulosic resins, vinyl resins, acrylic resins, polyester resins, silicone resins, and silicone-modified or fluorine-modified urethane resins. 
   
   
       8 . A blister package according to  claim 7 , wherein the binder composition comprises cellulosic resins selected from the group consisting of ethyl cellulose, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, cellulose acetate, cellulose acetate butyrate, and nitrocellulose. 
   
   
       9 . A blister package according to  claim 7 , wherein the binder composition comprises vinyl resins selected from the group consisting of polyvinylalcohol, polyvinylacetate, polyvinylbutyral, polyvinylacetal, and polyvinylpyrrolidone. 
   
   
       10 . A blister package according to  claim 7 , wherein the binder composition comprises acrylic resins selected from the group consisting of polyacrylamide, polyacrylonitrile-co-styrene, and polymethylmethacrylate. 
   
   
       11 . A blister package according to  claim 7 , wherein the binder composition comprises a silicone resin of polydimethylsiloxane. 
   
   
       12 . A blister package according to  claim 7 , wherein the binder composition further comprises a cross linking agent. 
   
   
       13 . A blister package according to  claim 1  or  3 , wherein the nonwoven layer comprises a single component spunbond web. 
   
   
       14 . A blister package according to  claim 1  or  3 , wherein the nonwoven layer comprises a full-surface bonded multiple component spunbond web. 
   
   
       15 . A blister package according to  claim 1  or  3 , wherein the nonwoven layer comprises at least one meltblown web sandwiched between first and second melt-spun continuous filament nonwoven sheets. 
   
   
       16 . A blister package according to  claim 15 , wherein the first and second melt-spun continuous filament nonwoven sheets are multiple component spunbond webs. 
   
   
       17 . A blister package according to  claim 16 , wherein at least one meltblown web is a multiple component meltblown web comprising bicomponent side-by-side meltblown fibers. 
   
   
       18 . A blister package according to  claim 16 , wherein the first and second multiple component spunbond webs comprise sheath-core spunbond fibers wherein the core component comprises a polyester and the sheath component comprises a polyolefin. 
   
   
       19 . A blister package according to  claim 1 , wherein the second barrier layer is a heat-sealable barrier layer adhered to the nonwoven layer, the inner surface of the lidding component comprises the heat-sealable barrier layer, and the lidding and blister components are heat sealed together to form a seal therebetween. 
   
   
       20 . A blister package according to  claim 19 , wherein the heat-sealable barrier layer comprises poly(vinylidene chloride).