chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

11.1 Fineness and unevenness of yarn11.1 Fineness and unevenness of yarn 11.2 Twist and twist shrinkage of yarn 11.2 Twist and twist shrinkage of yarn

11.3 Yarn hair and characteristics 11.3 Yarn hair and characteristics

11.4 Transferring and distribution of fiber11.4 Transferring and distribution of fiber in yarn in yarn

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-1 measure diagram of yarn diameter

0

I

t

I(t)

dI/dt

d

d

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-2 intuitive diagram and wave spectrum graphic of yarn unevenness

纱条长度

波长

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-3 wave spectrum graphic of fineness unevenness

(a)理论不匀谱 S(logλ )

logλ

S(logλ ) (b)正常不匀谱

logλ

S(logλ ) (c)牵伸波不匀谱

logλ

S(logλ ) (d)机械波不匀谱

logλ

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-4 variance-length curve

I(l)

B(l)

V=CV2

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-5 twist angle of yarn

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-6 diagram of twist direction

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-7 effects of twist direction on fabric properties

(a)

交织点 同向

捻向 相同

表观 反向

经

(b)

交织点 反向

捻向 相反

表观 同向

经

纬

纬

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-8 twisting length

(b) (a)

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-9 measuring twist angle of single yarn and ply yarn

股线 单纱

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-10 twist shrinkage of ply yarn

μ

O 捻系数

纱线捻向相反 纱线捻向相同

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-11 relation between twist factor and breaking strength

Fmax

捻系数

F

cri

cri

Fmax

短纤纱

长丝束

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-12 elongation diagrams of fiber and yarn under stretch

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-13 relation between volume weight, diameter and twist factor

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-14 basic forms of hair

C

C

后向（反加工方向）

前向（加工方向）

DH CH

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-15 curve of relation between hair index and hair length

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-16 twisting triangle zone of ring spun yarn

A B

A’ B’

O

O’

A

B

A’

B’

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-17 effects of transferring mechanism on transferring frequency

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-18 geometry form of dyed following fiber

chap11chap11 Basic characteristics parBasic characteristics parameter of yarnameter of yarn

Picture 11-19 calculating flow of Hamilton index and equally divided concentric circles

切片、拍摄 画半径等分圆环

点数 A、B纤维 测纤维截面积

计算 A纤维 FMA、FMI、FMO

Hamilton指数计算