| 摘要 |
The invention concerns a multilayer composite material comprising at least one core (3) interposed between two external layers (1, 2), wherein:—the core (3) is a layer of thermoviscous fluid at room temperature, said thermoviscous fluid having a dynamic viscosity coefficient greater than 100 Pa·s at room temperature,—each external layer (1, 2) is in a material in the solid state at room temperature, each external layer having a surface mass of less than 8 kg/m2.
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