Method of treating a fiber cushion body

摘要

A fiber cushion body, which is formed from cross-linked fiber material and which is resiliently deformable when load is applied along a main load direction, is treated using ultrasonic energy. A portion of the fiber cushion body is displaced, for example using a sonotrode, and ultrasonic vibrations are applied to the fiber cushion body to re-shape the fiber cushion body from a first shape to a second shape different from the first shape.

主权项

1. A method of treating a fiber cushion body, said fiber cushion body being formed from cross-linked fiber material, at least a fraction of said fiber material being thermally activatable, said fiber cushion body being resiliently deformable when a load is applied along a main load direction, said fiber cushion body having a first shape before being treated, the fiber cushion body comprising a resilient zone in which more than 50% of the fibers are respectively oriented at an angle of less than 45° to the main load direction and at least one further zone disposed at a major face of the fiber cushion body and distinguished from the resilient zone with regard to both fiber orientation and density, the method comprising:
displacing a portion of said fiber cushion body; and applying ultrasonic vibrations to said fiber cushion body to re-shape said fiber cushion body from said first shape to a second shape different from said first shape.