| 摘要 |
A mascara brush head includes bristles made from shape memory polymer (SMP) filaments or fibers. The shape memory polymer filaments are selected to exhibit a first shape during assembly of the brush, and a second shape after exposure to an external stimulus in the form of heat or other energy. The brush head is initially assembled, i.e., lengths of SMP filaments are placed between wire segments and the wire segments are then twisted about each other to form a twisted wire core. The core grips the filament lengths medially of their outer ends, usually substantially at their midpoints, so as to clamp them. The first shape can be straight to facilitate assembly of the fibers in the wire core. The second shape, after assembly in the core and after being subjected to the external stimulus, can be any bristle shape suitable for enhancing the function of the brush, e.g., kinked, wavy or coiled. The brush head may be comprised solely of SMP filaments, or may be a blend of SMP filaments and any other suitable filament (e.g., nylon, natural plant or animal fibers, etc.).
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