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US 11,084,246 B2Granted
Honeycomb sandwich sheet or panel, based on polypropylene, with a number of central thermoformed films
OwnerEraldo Peccettiinventor
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Abstract
A honeycomb sandwich sheet or panel, based on thermoplastic polypropylene, includes a structure having two flat outer films, at the top and bottom, welded to at least two inner or central thermoformed blister films, repeated in a regular and continuous pattern, wherein the at least two inner thermoformed films are welded to each other.
Claims11
A honeycomb sandwich sheet or panel comprising:
- a structure consisting of two flat outer films made from polypropylene, the two flat outer films being in top and bottom positions, and being welded to at least two inner thermoformed blister films made from polypropylene and disposed with a repeated, regular, and continuous pattern, each of the at least two inner thermoformed blister films having a plurality of blisters and a plurality of bottoms connected to the blisters by perpendicular walls,
- wherein said at least two inner thermoformed films are welded to each other with a blister-to-blister welding, or a bottom-to-bottom welding, and
- wherein the two flat outer and at least two inner thermoformed films each consist of three coextruded layers.
Dependencies are inferred from the claim text.