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