Journal of the Textile Machinery Society of Japan

Yarn Breakages on Worsted Ring Spinning Frames Using Spinmaster

Wajuro Itani, Michio Tamate, Tooru Yoshimoto

1978 Volume 24 Issue 4 Pages 87-96
Published: 1978
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.24.87

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Two kinds of worsted ring spinning frames were experimentally developed to decrease the number of yarn breakages during spinning. The first was characterized by extremely small spinning angles due to the replacement of snail wires by spinmasters. The distance between spinmaster and the nip point of front rollers is almost equal to the average fiber length. The second was also characterized by spinmaster, and the distance stated above is a little shorter than the longest fiber. The number of yarn breakages was found to decrease to 1/48-1/23 on the first frame, and to 1/12 on the second frame, comparing with that on existing frames.

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A Study How to Quantitatively Determine Crimps On Crape Fabrics

Hidetoshi Nakata, Masahiro Iwabuchi

1978 Volume 24 Issue 4 Pages 97-104
Published: 1978
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.24.97

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In order to quantitatively determine the crimps or waves of crape fabrics, we have analysed their appearance caused by shrinkages of single hard twist yarns and untwisting moment. The results are summerized: (1) The size of crape crimps is closely related to the number of spiral circles. Equation will be: m=0.2T/(1-f(s)) where m is the number of spiral circles: T, yarn twist and f(s), shrinkage of crape fabric. (2) The amplitude of crape crimps is related to the radius of spiral circles and given by the following formula: r=√<1-(1-f(s)²>)/ 0.4πT (3) The thickness of crape fabric is in proportion to the radius of spiral circles. It is greately influenced by the twist multiplier of hard twist yarns: (4) The degree of crimps, Ca-1, is a function of the fabric shrinkage as in the following formula; Ca-1 = A•f(s)^5/2 where A is an experimental constant determined by the weft yarn arrangements.

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Physical Properties of Fabrics Relating to Making-Up and Good Appearance

Harumi Morooka, Masako Niwa

1978 Volume 24 Issue 4 Pages 105-114
Published: 1978
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.24.105

JOURNAL FREE ACCESS

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To find out factors which contribute to easy handling in making-up and to a good appearance in finished garments, mechanical properties of fabrics such as extension, bending, shearing, compression, friction and surface contour were measured.
On the other, eighteen making-up personnels classified the fabrics according to the easiness in making-up and their appearance.
The results are summarized as follows:
1) Easy handling in making-up fabrics can only be obtained within small ranges in tensile, bending, shearing and compressional properties. Larger ratio of plasticity to elasticity in bending and shearing properties gives more easiness.
2) The mechanical properties of fabrics having a good appearance in finished garments lie almost in the same range[1] as fabrics having good hand, or close to those of fabrics easy for handling in making-up. Further, the complex physical properties in the gravitational field contribute to a good appearance in finished suits.
3) Fabrics easy for handling in making-up and fabrics having a good appearance in finished suits have moderate take-in and settability.

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