Honeycomb sandwich sheet or panel, based on thermoplastic polypropylene

摘要

A honeycomb sandwich sheet or panel, based on thermoplastic polypropylene, includes a structure having two flat outer films, thermowelded to a central film that includes a thermoformed blister film, with blisters repeated in a regular and continuous pattern, the flat outer films including a coextruded two-layer film, based on thermoplastic polypropylene, wherein the inner layer faces the central thermoformed film, and the central thermoformed blister film includes a coextruded three-layer film, based on thermoplastic polypropylene, wherein the two outer layers face the flat outer films, and wherein the structure includes and additional layer C thermowelded to the outer layer of the two flat outer films.

主权项

1. A honeycomb sandwich sheet or panel, based on thermoplastic polypropylene, comprising:
a structure having two flat outer films, thermowelded to a central film consisting of a thermoformed blister film, with blisters repeated in a regular and continuous pattern, said flat outer films comprising a coextruded two-layer film (AB), based on thermoplastic polypropylene, wherein an inner layer (A) of the two-layer film faces the central thermoformed blister film and the central thermoformed blister film is a coextruded three-layer film (ABA) based on thermoplastic polypropylene, wherein two outer layers (A) of the a coextruded three-layer film (ABA) each face one of the flat outer films, and wherein said structure comprises an additional layer (C), thermowelded to an outer layer (B) of the two flat outer films.