| 摘要 |
Each of the carrier tapes of a slide fastener include respective pairs of superimposed layers or plies of highly oriented polymer through which stitching threads are secured to attach coupling elements to each tape. The molecular orientation of each of the superimposed layers is at an oblique angle to the inner edge of the tapes with the orientation of one layer being transverse to the orientation of the other layer to prevent tearing of the stitches from the tapes. |
