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US 5,093,164 AGranted
Multiple layer packaging sheet material
OwnerFrank T. Bauer, Yong J. Kim +1inventors
InventorsFrank T. Bauer, Yong J. Kim, Roger P. Genske
Life of this patent
Estimating the term…
Abstract
Packaging sheet materials 10 and packages having improved impact/shock tolerance as measured in a slope drop test. The sheet materials comprise an impact layer 12 of a blend of polypropylene and a polymer providing elastomeric properties between a sealant substructure 14 and a substrate substructure 16.
Claims64
A multiple layer sheet material, comprising:
- (a) a first sealing layer comprising 65% to 95% by weight of a propylene polymer and 35% to 5% by weight of an ethylene polymer having a density of at least 0.930;
- (b) a second substrate structure;
- and
- (c) an impact layer disposed between said first sealant layer and said second substrate structure,
- the composition of said first sealant layer being adapted to provide a peelable heat seal.
2 more elements
A multiple layer sheet material, comprising:
- (a) a first sealant layer comprising polypropylene;
- (b) a second substrate structure;
- and
- (c) an impact layer disposed between said first sealant layer and said second substrate structure, the composition of said impact layer comprising (i) a first component including a polypropylene polymer and (ii) as a second component, an ethylene butene-1 copolymer containing 85% to 95% ethylene and providing elastomeric properties to said impact layer.
1 more element
A multiple layer sheet material, comprising:
- (a) a first sealant layer comprising polypropylene;
- (b) a second substrate structure;
- and
- (c) an impact layer disposed between said first sealant layer and said second substrate structure, the composition of said impact layer comprising (i) a first component including a polypropylene polymer, (ii) as a second component, a first polymeric composition providing elastomeric properties to said impact layer, and (III) as a third component, a second polymeric composition providing elastomeric properties to said impact layer, said second and third components being different from each other.
1 more element
Dependencies are inferred from the claim text.