METHOD OF LONGITUDINAL ZIGZAG SHADOW WEAVES FABRICS PRODUCING Russian patent published in 2016 - IPC D03D23/00 

FIELD: textile.

SUBSTANCE: invention allows to expand range of combined shadow weaves fabrics with effect of longitudinal volume zigzags by changing ascent angle of longitudinal zigzag pattern ascending or descending teeth line. Method to produce longitudinal zigzag shadow weaves fabrics consists in formation of teeth on fabric surface, located at ascending or descending line, formed by inclined dimensional light strips, varying their width and direction across width of fabric, in selection of basic main class weaving, in selection of one of threads systems as active, formation of initial shadow weaving along threads passive system with single over-lappings reinforcement along weft base; in selection of number of base threads K_b to break by base, formation of first tooth first and second fragments and tooth in general with subsequent formation of second tooth, wherein rapport is determined by longitudinal zigzag shadow weaving weft R_w using mathematical expressions: at base threads active system: - at odd rapport R_b of basic weave R_w=2R_b[R_b(R_b-1)-1], - at even rapport R_bR_w=R_b[R_b(R_b-1)-1]; at weft threads active system and any rapport R_b:R_w=2[R_b(R_b-1)-1], for changing of shadow zigzag weaving teeth line ascent or descent angle on fabric surface adopting peaks shift value ±S_p, varying multiple to base threads active system basic weave repeat R_b in range of R_b≤|S_p|≤R_w-R_b, at weft threads active system in weft threads range of R_b≤|S_p|≤R_w-2(R_b-1), then adopting number of base threads K_b before fracture by base in each tooth, considering that on one side, number of threads K_b≥S_p+ R_b+2, and on other side, with weft threads active system K_b≥2[R_b(R_b-1)-1], with weft threads active system and odd rapport R_b of basic weave number of threads K_b≥2R_b[R_b(R_b-1)-1], and with base threads even rapport R_b K_b≥R_b[R_b(R_b-1)-1]; determining tooth rapport R_t, number n_t of rapport teeth by base and rapport by base R_b of longitudinal zigzag shadow weaving using mathematical expressions: R_t=2K_b-S_p-2; n_t=LCM(R_w, S_p)/S_p (LCM is least common multiple); R_b=R_tn_t; after that, on initial shadow weaving base forming inclined light strips in first tooth first and second segments and tooth in general of longitudinal zigzag shadow weaving considering obtained K_b and R_w of threads; formation of second and subsequent teeth is performed taking into account obtained peaks shift value ±S_p.

EFFECT: expansion of fabrics range.

1 cl, 4 dwg