| 摘要 |
A yarn comprises synthetic elastomeric fibres or filaments-for example of polyurethane-and water soluble polyvinyl alcohol fibres or filaments for temporary control of the elasticity of the elastomer during fabric formation. As described a synthetic elastomeric filamentary yarn may be combined side-by-side with, be coiled around or be coiled by, or be twisted with a polyvinyl alcohol filamentary yarn which may be coloured. The surface of the vinyl yarn may be raised, sueded, or grooved, or may be treated with a non-skid agent. The composite yarn may itself be coiled with a natural or synthetic thread and/or be bonded with a water-soluble sizing agent. To form staple fibres, the bonded yarn is stapled, and the fibres crimped or curled by heat treatment if the vinyl constituent has latent shrinkability. The staple fibres may be blended with other synthetic fibres before or after crimping. The elastomeric fibres may be "spot-adhered" to the other synthetic fibres by a water-insoluble sizing agent spot-applied to the bonded yarn before stapling. Fabrics described are a lace fabric made by embroidering a base cloth of polyvinyl alcohol with a composite yarn and dissolving out all the polyvinyl alcohol; a woven fabric formed from one composite yarn, or with the warp formed from two different composite yarns and the weft from a natural or synthetic yarn, Figs. 8 (2) and (3) (not shown); a flat-knitted fabric either composed of one composite yarn, or of two composite yarns and one natural or synthetic yarn, Figs. 9 (1) and (2) (not shown); and a warp knitted fabric made of two composite yarns and one ordinary yarn, Fig. 9 (3) (not shown). |
