Abstract: In view of the fact that the theory of warp knitted broché Jacquard is rarely studied, here and abroad, and its technology bottleneck in application field, this paper probes into the characteristics and basic principle of broché jacquard fabric. Based on the content, an in-depth analysis and investigation on the needle selection principles, and movement rules of crochet hook are undertaken. According to the statistics from experimental trials on the machine, the displacement curve model of crochet hook, corresponding to the space and time axis, is built, and thus its motion characteristics are more deeply and rationally illustrated. In addition, the graphical model of single-yarn selection is also built which explains in detail the concrete realization process of single-yarn selection and its implementation route. Lastly, the structure of broché jacquard fall-plate lapping is analyzed, meanwhile, a suitable mode for broché jacquard is equally figured out. Moreover, after a comparison in formation theories with the embossed pattern and slap-up cutting pattern, the broché pattern demonstrates its own comprehensive advantages in terms of production and performance. The above research on principles about warp knitted broché Jacquard could provide a reference to the design of broché jacquard machine as well as its products.

Key words: warp knitting, Broché, single-yarn selection