Sheet-like element such as a net, particularly for geotechnical applications

• US 8,109,696 B2
• Filed: 11/09/2006
• Issued: 02/07/2012
• Est. Priority Date: 02/22/2006
• Status: Active Grant

• Current Assignee: Tenax Corporation (Tenax)
• Original Assignee: Tenax Corporation (Tenax)
• Inventors: Maggioni, Pierluigi
• Primary Examiner(s): MAYO-PINNOCK, TARA LEIGH
• Application Number:
  US12/087,731
• Publication Number:
  US 20090003941A1
• Time in Patent Office: 1,916 Days
• Field of Search: None
• US Class Current: 405/302.7
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/744 Non-slip, anti-slip
• CPC Class Codes: B32B 3/08 characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: B32B 5/028 Net structure, e.g. spaced apart filaments bonded at the crossing points
• CPC Class Codes: B32B 7/14 applied in spaced arrangements, e.g. in stripes
• CPC Class Codes: E02D 17/202 with flexible securing means
• CPC Class Codes: Y10T 442/198 Coated or impregnated

Abstract

A sheet-like element, such as a net, particularly for geotechnical applications, comprising a sheet-like body formed by superimposing at least two sets of filaments in order to provide a lattice-like structure, the sheet-like body being provided by a first polymer, which defines the lattice-like structure, and a second polymer, which is coextruded together with the first polymer and affects at least regions of at least one face of the sheet-like body, the first polymer having physical and mechanical characteristics of compressive and tensile strength, while the second polymer has a high friction coefficient.

Claims

1. A net for geotechnical applications, comprising an extruded polymer sheet body formed by superimposing two sets of filaments in order to provide a lattice structure, said two sets of filaments mutually intersecting to form meshes, and said two sets of filaments being made of a first polymer, wherein said sheet body is provided by means of said first polymer and a second polymer, said first polymer and said second polymer together defining said lattice structure, said first and second polymers being mutually coextruded together to form said extruded polymer sheet body as a single element, and said second polymer being arranged at regions of at least one face of said sheet body such that said first polymer and said second polymer form said net as said single element having said lattice structure, said regions of said second polymer comprising a plurality of mutually parallel linear strands being arranged on and extending exclusively along one set of said two sets of filaments, said first polymer having physical and mechanical characteristics of compressive and tensile strength, said second polymer having a reduced surface hardness with respect to said first polymer.

2. A net according to claim 1, wherein said first and second polymers are chemically compatible.

3. A net according to claim 1, wherein said first and second polymers are polyethylene-based.

4. A net according to claim 1, wherein said first and second polymers are polypropylene-based.

5. A net according to claim 1, wherein said second polymer is filled with rubber materials.

6. A net according to claim 1, wherein said second polymer is filled with ethyl vinyl acetate resins.

7. A net according to claim 1, wherein said second polymer has a lower melting point than said first polymer.

8. A net according to claim 1, wherein said second polymer affects at least regions formed on both faces of said sheet body.

9. A net according to claim 8, wherein said at least regions provided with said second polymer are adapted to act as an adhesive element for the connection of at least one outer layer.