A study on the structure and the manufacturing process of fancy yarn (Chinese)

The manufacturing process of fancy yarn is very complicated. During spinning the regularity of yarn can be modified so its appearance is considerably different from ordinary yarn. This paper discusses the spinning of fancy yarn and its structure.

Effect of cross section of spandex yarn on air drag (Japanese)

The effect of the yarn cross section on the air drag coefficient and characteristic length of spandex yarn which does not have a circular cross section, was examined. The way to estimate the air drag of spandex yarns in axisymmetric air flow are shown and the results obtained are as follows. The air drag coefficient of the spandex yarn sh..

Seam tenacity and fracture mode of Tencel fabrics (Chinese)

Tencel is a popular choice of fabric in today's market due to its environmentally friendly image. In this paper PET spun yarn was used to sew the Tencel and then the factors affected by the seaming process, such as tensile tenacity of sewing threads, seam angles and stitch densities, were researched. The seam fracture mode of Tencel was a..

Effect of thread tension on seam puckering (Japanese)

The relation between thread tension seam puckering mechanical properties of fabric, and dynamic thread tension was studied to clarify the mechanism of seam puckering. The thread tension was estimated using the relation between the twist angle of thread and tensile forces in a seam. The estimated thread tension was less than one-third of t..

Stretch synthetic sueded from Unitika

Unitika Ltd has developed stretch synthetic suede, Silseim, for furniture applications. Made from polyester microfiber and polyurethane resin, Silseim will be marketed from fall/winter 1997-98. Silseim is 82％ polyester and 18％ polyurethane and offers effects similar to leather.

Magnetically held yarn withdrawal navel arrangement

A yarn withdrawal navel assembly for a rotor open-end spinning machine includes a mounting member which protrudes into an open side of the spinning rotor, a yarn withdrawal navel, and at least one holding magnet provided at the mounting member and the navel. The magnetic forces between the navel and the mounting member vary depending on t..

Twisting with elastomer

This paper reviews the Geminis two-for-one twister, from Savio Macchine Tessili Sril, Italy, examining its ability to process staple fibre yarns with elastomer. It outlines the operations involved in processing with coated elastomer, and with natural elastomer, highlighting that elastomer masking should guarantee less risks of filament br..

Research on the effective factors of the twist contraction ratio of polyester filament (Chinese)

In this paper the twist contraction ratios of polyester filament are measured under different pretentions and twist constants. The rule of the twist constant affecting the twist contraction ratio is discovered. The conclusion reached has great significance for the production of polyester filament fabrics.

Spinnability of Gara-bo spun silk yarn (Japanese)

Gara-bo yarn has begun to attract growing attention. There have been very few reports on the yarn-marking mechanism of the Gara-bo spinning frame or of Gara-bo spun silk yarn. In order to consider the feasibility of using this spinning techique in the making of spun silk yarn with additional desirable attributes, the spinnability of the G..

Experimental Investigation into Loop Forming (Loss of Stability) by Turning of Threads.

A study investigated the stress-strain state of yarns at the twisting, steady straining, and unsteady straining stages of loop formation for monofilament, complex, and high bulk yarns. The effects of the roll on stability were similar in all samples. If t