3. PREPARATIONS FOR WEAVING START-UP
78
3.1.2
Preparing the Droppers
–– Reference –– Choosing the Droppers
The following data comes from the ISO and Grob catalogues.
(1) Dropper types
(2) Warp yarn count and suitable dropper weight
IMPORTANT
Check whether you are responsible for the preparation of the droppers. If you are responsible, prepare
them before the start-up of weaving.
Closed type
Open type
Uster type
Barber Colman type
For Uster pinning
machines
Length
(L)
0.15
mm
0.2
mm
0.3
mm
0.35
mm
0.4
mm
0.5
mm
0.15
mm
0.2
mm
0.3
mm
0.4
mm
0.15
mm
0.2
mm
0.3
mm
145 mm
(8) mm 0.92 g 1.2 g 0.9 g 2.1 g
0.9 g 1.2 g 1.9 g
0.79 g 1.1 g 1.7 g
9
1.06
1.06
1.4
11
1.42
1.9
2.9
3.9
4.75
1.3
1.9
2.9
3.9
1.7
2.5
165 mm
(8)
1.2
1.9
9
11
2.2
3.3
4.4
1.9
2.9
Warp yarn
Dropper
weight(g)
Tex count
Metric count
English number count
Silk denier
Cotton yarn
Worsted
yarn
Wool yarn
Linen yarn
Up to 11
90 or
greater
54 or
greater
Up to 100
Up to 1.0
11 to 18
56 to 90
32 to 54
50 or
greater
90 or
greater
100 to 160
1.0 to 1.5
18 to 25
40 to 56
24 to 32
36 to 50
65 to 90
160 to 220
1.5 to 2.0
25 to 32
32 to 40
18 to 24
28 to 36
52 to 65
220 to 290
2.0 to 2.5
32 to 40
25 to 32
15 to 18
22 to 28
48 or
greater
42 to 52
290 to 360
2.5 to 3.0
40 to 72
14 to 25
8 to 15
12 to 22
27 to 48
23 to 42
360 to 660
3.0 to 4.0
72 to 100
8 to 14
5 to 8
Up to 12
16 to 27
14 to 23
660 or
greater
4.0 to 6.0
Closed Uster
type
Type
Dimensions
Thick-
ness
Width
(W)
