Flexible insulation composite for high and low temperatures
View Patent ↗The present invention relates to a thermal and/or sound insulation system with resistance to elevated as well as low temperatures comprising at least one inner layer (A) obtained from temperature invariant and/or temperature resistant material as decoupling layer, at least one layer (B) as intermediate temperature gradient layer comprising temperature invariant and/or temperature resistant material, and at least one outer layer (C) as insulation layer comprising an expanded polymer blend, the process for manufacturing of such a system and the use of such system.
1. A material comprising at least one of a thermal or sound insulation material comprising at least one inner layer (A) comprising at least one of temperature invariant or temperature resistant material as decoupling layer showing a two or three dimensionally structured surface on at least one side, at least one layer (B) as intermediate temperature gradient layer comprising at least one of temperature invariant or temperature resistant material, and at least one outer layer (C) as insulation layer comprising an expanded polymer blend wherein layer (A) has a thickness >10 micron, layer (B) has a maximum thermal conductivity of 0.1 W/mK, and a thickness between 5 and 50 millimeters, and the polymer blend of layer (C) is expanded to a closed cell content of at least 80%.
2. The material according to claim 1 wherein the polymer blend of layer (C) is expanded to a density of less than 150 kg/m 3 , according to ISO 845.
3. The material according to claim 1 wherein the expanded polymer blend has a thermal conductivity of less than 0.10 W/mK at 0° C., according to EN 12667.
4. The material according to claim 1 wherein the polymer blend is crosslinked.
5. The material according to claim 1 wherein the polymer content of the polymer blend is elastomeric.
6. The material according to claim 1 wherein the polymer blend comprises at least one of a heat or reversion stabilizing system.
7. The material according to claim 1 wherein the structures of layer (A) show at least one of triangular, sinus like, trapezoidal, rectangular, (semi)circular or (semi)multi-edge cross-section.
8. The material according to claim 1 wherein surface structures are on both sides of layer (A).
9. The material according to claim 1 wherein surface structures are on any side of any of the layers (A), (B), (C).
10. The material according to claim 7 wherein the structures of layer (A) are ridge structures.
11. The material according to claim 1 which comprises additional layers for protection, barrier and shielding purposes at least one of on, under or within other layers.
12. The material according to claim 1 wherein pipes or tubes of plastics and metal are covered by the insulation layers to form pre-insulated parts.
13. A process for manufacturing the material according to claim 1 in at least one of a moulding, continuous (co)extrusion or lamination process followed by or comprising a process for generating surface structures.
14. A process for manufacturing the material according to claim 12 in a continuous process.
15. The use of a material according to claim 1 for applications requiring at least one of high temperature resistance or low temperature flexibility at application temperatures >180° C. or <−40° C., respectively.
16. The use of a material according to claim 1 and for applications requiring sufficient viscous response at given application temperatures for at least one of noise/vibration/sound absorption or damping at temperatures >180° C. or <−40° C., respectively.
17. The material of claim 1 wherein layer (B) has a maximum thermal conductivity of less than 0.051 W/mK.
18. The material of claim 2 wherein the polymer blend layer is expanded to a density of less than 75 kg/m 3 according to ISO 845.
19. The material of claim 3 wherein the expanded polymer blend has a thermal conductivity of less than 0.045 W/mK at 0° C. according to EN 12667.
20. The material of claim 1 , wherein layer (A) has a thickness between 0.1 and 6 mm.