混撚網糸の比重について
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概要
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The weight of netting cord in water is related by the specific gravity of the fiber which is used as the material for the cord. The netting cord of a desirable specific gravity is available by combining properly two or more fibers of different specific gravities. The specific gravity of the netting cord combined by two kinds of fibers is shown as follows: ρ=(n1ρ1a1+ρ2a2)/(n1a1+a2), n1 =(r1/r2)2=D1ρ2/D2ρ1 where a1, a2; number of yarn r1, r2; radius of fiber D1, D2; denier of fiber ρ1, ρ2; specific gravity of fiber Therefore, from the relation between n1 and ρ we obtain the denier ratio of fiber combined. In the next step the number of fiber is controlled by the denier of fiber practically combined and the specific gravity of the mixed netting cord can be calculated.
- 公益社団法人 日本水産学会の論文