| 摘要 |
<p>A spin pack is provided for producing heterofilaments from two polymer streams. Each stream is subdivided and the subdivisions filtered and delivered to a common header. The two headers are parallel and are defined between the upper face of a spinnerette and the adjacent members. Off each header and extending toward the other are a plurality of grooves, the grooves of one header alternating with those of the other and constituting pairs or couplets. Between each pair of grooves there are a plurality of channels of precise dimensions, e.g. length of at least about 0.075 inch, width of at least about 0.016 inch and depth of from about 0.005 to 0.030 inch, and a spinning orifice is located centrally of each channel. In this fashion each orifice gets the same amount of each polymer.</p> |
