| 摘要 |
An apparatus and process of extruding a strip fastener is disclosed. The fastener product has a continuous sheet-form base (22) and rows of discrete fastener elements (21) that extend from one side of the sheet-form base (22), and is formed by extruding a molten polymer through an extrusion die (10) having a die opening comprising a base opening (12) for forming the sheet-form base (22) and contiguous therewith a series of fastener element openings (11a, 11b, 11c) for extrusion of the rows of fastener elements (21), each fastener element opening (11a, 11b, 11c) having a profile configured to form oppositely directed sides of the discrete fastener elements (21) of one row. While extruding the product, flow of the molten polymer through the fastener element openings (11a, 11b, 11c) is periodically interrupted while continuing the flow of the polymer through the base opening (12), thereby forming rows of upstanding fastener elements (21) integrally extruded with a sheet-form base (22). The fastener products is also disclosed.
|
