This paper describes the results of the investigation of the possibility of high-speed and stable acrylic spinning with rotary rings. Results of the test are as follows:
(1) The wear of travellers on the rotary ring is far less than that on the stationary ring.
(2) At high-speed (15, 500rpm), yarn fluffs caused by the rotary ring are significantly less than those by the stationary ring.
(3) Strength and elongation of single yarns produced by the rotary ring are superior to those by the stationary ring under certain spinning conditions (at 15, 500rpm and at the start of the spinning). But no significant difference is found under other conditions.
(4) At high-speed rotating, melt yarn by the rotary ring is less than that by the stationary ring.
(5) Yarn end-down and traveller fly-away with the rotary ring are significantly lower than those with the stationary ring.
(6) The power consumption by the rotary ring does not differ from that by the stationary ring. From the above results, it is concluded that the rotaty ring is effective for high-speed spinning of acrylic yarns.

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Open end yarns are structurally different in character from ring spun yarns. This difference in structure could affect the yarn properties and consequently the fabric properties. This paper attempts a comparison of the stiffness properties of open end yarn fabrics and similar ring spun yarn fabrics using the SITRA Electronic Stiffness Tester. The important conclusions are that although open end fabrics show a higher stiffness than similar ring spun fabrics, there are directions in which the stiffness of open end fabrics is lower. Also comparison has been made of the stiffness behaviour of a open end fabric pile with that of the ring spun fabric pile.

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We have tried applying the distance mesuring technique by ultrasonic sensor to non-contact measurement of the surface shape of cloth with small curve such as wrinkle. An ultrasonic sensor used is a focusing type (dia.: 30mm; focus: 50mm; beam dia.: 1mm). It is observed that the sensor can detect the change at the level of 1mm both in height and in interval of the curved surface and this measuring method has the possibility to obtain the fairly accurate result for the measurement of the shape of small curved surface.
Also, we have tried measuring the 3-dimensional shape of garment made of some large curved surfaces. In the experiment, we measured the distance from reflecting surface by attaching a sensor (dia.: 10mm; focus: 60mm; beam dia.: 6mm) at the end of the arm of drape measuring apparatus (trial model). In this measurement, the data of 3-dimensional shape of garments made of sofa and thin materials were easily detected, and the efficiency of a non-contact measuring method by the ultrasonic was proved.

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