COMPOSITE STRUCTURE

• US 20140295187A1
• Filed: 02/16/2014
• Published: 10/02/2014
• Est. Priority Date: 03/28/2013
• Status: Active Grant

• Current Assignee: Siemens Gamesa Renewable Energy A/S (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Kybelund, Peter, Jacobsen, Peter Andreas Lund
• Granted Patent: US 10,328,676 B2
• Time in Patent Office: Days
• US Class Current: 428/413
• CPC Class Codes: B32B 17/04 bonded with or embedded in a plastic substance
• CPC Class Codes: B32B 2260/021 Fibrous or filamentary layer layers of natural mineral fibres or particles being impregnated in a plastic substance B32B19/02
• CPC Class Codes: B32B 2260/046 Synthetic resin
• CPC Class Codes: B32B 2262/101 Glass fibres
• CPC Class Codes: B32B 2274/00 Thermoplastic elastomer material thermoplastic elastomer fibres B32B2262/0215, thermoplastic elastomer particles B32B2264/0221, thermoplastic elastomer foam B32B2266/0292
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2603/00 Vanes, blades, propellers, rotors with blades
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 5/024 Woven fabric
• CPC Class Codes: B32B 7/10 at least one layer having inter-reactive properties
• CPC Class Codes: C08J 5/04 Reinforcing macromolecular compounds with loose or coherent fibrous material
• CPC Class Codes: F03D 1/0675 of the blades
• CPC Class Codes: F05B 2280/4007 Thermoplastics
• CPC Class Codes: F05B 2280/6003 Composites; e.g. fibre-reinforced
• CPC Class Codes: F05B 2280/6015 Resin
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y10T 428/31511 Of epoxy ether

Abstract

A composite structure having a number of thermoset resin containing elements and a number of thermoplastic elements and at least one interface between the thermoset resin containing elements and the thermoplastic elements is provided. The thermoset resin containing elements and the thermoplastic elements have functional groups at the interface which bond to each other when the composite structure is cured and the functional groups are independently selected from amines, carboxylic acids, acid anhydrides, oxiranes, and derivatives thereof in their non-bonded condition. Additionally, a blade having such a composite structure is provided.

Claims

1. A composite structure comprising

a number of thermoset resin containing elements and a number of thermoplastic elements and at least one interface between the thermoset resin containing elements and the thermoplastic elements,

wherein the thermoset resin containing elements and the thermoplastic elements comprise functional groups at the interface which bond to each other when the composite structure is cured and the functional groups are independently selected from amines, carboxylic acids, acid anhydrides, oxiranes, and derivatives thereof in their non-bonded condition.

2. The composite structure according to claim 1, wherein the thermoset resin containing element comprises a two or three component system having at least one resin component and at least one hardener.

3. The composite structure according to claim 2, wherein the resin component comprises an epoxy resin.

4. The composite structure according to claim 2, wherein the thermoplastic element comprises functional groups reactive with the resin component or with the hardener.

5. The composite structure according to claim 1, wherein the composite structure comprises a laminate of two or more thermoset resin containing elements and one or more thermoplastic elements.

6. The composite structure according to claim 1, wherein the thermoplastic element is arranged at the surface of a thermoset resin containing element.

7. A blade comprising a composite structure according to claim 1.

8. The blade according to claim 7, wherein the blade is part of a wind turbine system.

9. The blade according to claim 7, wherein the thermoplastic element is part of an aerodynamic improving element.