| 摘要 |
A safety razor blade tool includes a substantially rectangular safety razor blade having a cutting edge and an opposing non-cutting edge, and a rubberized thermoplastic protective cover fixedly attached to the non-cutting edge. The protective cover has an extruded substantially rigid inner layer of thermoplastic material and a coextruded thermoplastic rubber outer layer. Such an improved safety razor blade tool may be produced by providing a blade having a cutting edge and a non-cutting edge, feeding a substantially rigid thermoplastic in a viscous state to a coextrusion die, simultaneously feeding a thermoplastic rubber compatible with the substantially rigid thermoplastic in a viscous state to the same coextrusion die, coextruding the substantially rigid thermoplastic and the compatible thermoplastic rubber to form a one-piece coextruded protective cover having an inner layer of the substantially rigid thermoplastic and an outer layer of the compatible thermoplastic rubber, and fixedly attaching the coextruded one-piece protective cover to the non-cutting edge of the blade.
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