US 11,535,016 B2 · Perforated polymeric sheet with underlying spacers

Abstract

A new protective polymeric sheet is described wherein said polymeric sheet includes perforations and attached spacers that allow air and water circulation when the sheet is in use. The sheet protects underlying structures from damage while ensuring moisture migration between the protective polymeric sheet and the underlying structure. The protective polymeric sheet comprises a plurality of perforations extending through the sheet and a plurality of spacers, each spacer extending from a lower surface of the sheet adjacent to one side of each perforation. The spacers are created during perforation of the polymeric sheet. The protective polymeric sheet is useful in a number of applications, including without limitation: to protect pipelines; to replace geotextiles in heap leach processes; to line sandboxes and paving stones; to cover greenhouse floors; to make industrial or residential gutter caps; and as a filter.

Claims20

Dependent claims

A protective polymeric sheet comprising:

a) a layer consisting of a polymeric material having an upper surface and a lower surface;
and
b) a plurality of perforations with nobs on only one side of the perforations that remain attached to the lower surface of the polymeric layer, each of said nobs comprising the polymeric material punched from said layer to create said perforations whereby
each of said nobs remains attached to only one side of its associated perforation, and
each of said nobs are beneath said layer lower surface and clear of its associated perforation.

2 more elements

Dependencies are inferred from the claim text.

Perforated polymeric sheet with underlying spacers

Life of this patent

Perforated polymeric sheet with underlying spacers

Life of this patent

Abstract

Claims20