| 摘要 |
This invention concerns a process for the manufacture of spiralled bristles by extrusion of a monofil. In order to create a process by which cost-effectively to produce bristles of the same uniform and predetermined quality as traditional bristles, a monofil with a non circular cross-section is to be produced which, when pulled-off, is pretensioned causing a reduction in its cross-section, then further tensioned after which it is twisted over at least a part of its length to form a spiral bristle and finally it is stabilized by shrinking. In this way, a monofil with an oval or polygonal cross-section or with a core and at least one rib running longitudinally along it can be extruded. A further process can be envisaged whereby at least two monofils can, when pulled-off, be pretensioned causing a reduction in their cross-section, then further tensioned, twisted together and heat shrunk to form a stable bristle material.
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