| 摘要 |
Disclosed is a unitary face shield for a sports helmet. The shield includes a first portion which is comprised of a transparent polymeric material and a second portion comprised of a structural polymeric material. The second portion has a plurality of openings defined therethrough, and the first and second portions are fusion bonded together in an edge-to-edge relationship so as to produce a unitary body. The face shield may include still further portions and these may be structural or transparent portions. The transparent portions are fabricated from a high-impact material such as polycarbonate or impact-modified acrylic, and the structural portions are fabricated from high strength structural polymers such as nylon, polypropylene, polycarbonate, ASA, and various combinations. The structural polymer may include reinforcing materials. Also disclosed are methods for manufacturing the shield by composite molding processes.
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