In the previous paper, a theoretical method of calculating biaxial tensile properties of plain knitted fabrics has been presented.
With some assumptions, the theory uses a relatively simple structural model, so that it is required to confirm its accuracy in practical use.
In this paper, some typical samples are prepared and their tensile properties for some kinds of bixaial deformation mode are calculated, and then the samples are measured in those deformation mode using biaxial tensile testing instrument for the purpose of comparing both.
Very good agreement between the theoretical and experimental results is obtained in every samples and in all deformation modes.
Some discussions are done on some problems which are occured at practical use of this theory.
It is confirmed that the theory has accuracy enough for practical design of the structure of plain knitted fabrics.

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There have been many studies on the handling. Not may of their results, however, can be applied to the industrial uses. In this paper, the author has tried to make a system for solving the problems of the handling.
The key point in this case is to find a useful method for measuring handlings. It is hypothesized that handings may be something perceived by subjective application of force.
How to represent the mechanical properties of fabrics and how to connect thus obtained ones to handlings have been especially discussed.
1. The handling criterion is arranged as shown in Fig. 1.
2. The new concept “the basic mechanical properties” is presented, which should be the representatives of the mechanical properties of fabrics. The method for instituting them were discussed.
3. The new concept “the basic handlings” is also presented, which are the mediums between the descriptive words for the handlings and basic mechanical properties. They can be constituted by giving sensorial discriptions to the basic mechanical properties.
4. How to translate voluntarily described words for handlings into the basic handlings is discussed.
5. How to extract the correct informations of the handlings from the measured data of the basic mechanical properties is also discussed.
6. A system for solving the problems of the handling, as shown in Fig. 5 is presented on the basis of the above theoretical results. Some explanations are given for each path in this system.

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The effect of ring and traveller during twisting of polyester tire cord on the cord has been examined, and the ring material and its lubricating system have been discussed in relation to large package twisting with the following results :
(1) When twisting the polyester cord with a balloon control ring to control balloonings, the polyester cord is deteriorated through melting of fibers due to friction between the cord and the balloon control ring. Therefore, the spindle speed of twisting of polyester tire cord should be reduced about 40% less than that of the nylon cord.
(2) Different from the Nylon cord, the palyester cord is not affected by twisting tension, even if the twisting tension up to 0.3g/den is given.
(3) The spindle speed can be increased about 20% by the use of a Nylon traveller and a porously sintered metal-ring having a high diffusion and high lubricating oil-maintaining ability—more than that of the oil ring.
(4) The automatic pressure lubricating system. through the inner hole having a short cross ditch is more effective than the self-lubricating system. The spindle speed can be increased about 25-30%.
(5) Under the high level twisting condition that the ring diameter is 178∅mm and traverse lift is 355mm (about 4kg pakcage), the maximum spindle speed up to 7000rpm can be possible for nylon 840d/2 cord and up to 5000rpm for polyester 1100d/2 cord.

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