3.1 Warp-related Preparations
83
3.1.5
Preparations for Selvage Con-
struction
[ 1 ] For Full-leno Selvage Device
This device binds two leno yarns with every weft
yarn at each side of the fabric to produce a firm sel-
vage construction which will not become loose if
weft yarns are cut.
Yarn specifications for leno yarn
•
Yarn type:
Same type of two-ply yarn as that for the
ground warp
•
Yarn number count:
Almost the same as for the ground warp or
slightly greater than that for the ground
warp
•
Primary twist: Z-twist
Final twist: S-twist
If using the same type of yarn as for ground
warp results in insufficient strength of the full-
leno selvage, it is recommended that finished
yarn of 50d or 75d be used, provided that no
problem occurs in the subsequent processes.
For the handling manner of the winder, refer to
the manufacturer’s manual.
When using the special winder for winding yarn
onto the leno bobbin, do not increase the yarn take-
up tension excessively by the winder, particularly
when filament yarn is used. Otherwise, the leno
bobbin may be deformed, making it impossible to
set the bobbin into the bobbin holder.
(3) How to draw in leno yarn through the reed
– At the left side of the machine
Draw in leno yarns
○
through the same dent
through which the leftmost ground yarns
△
are drawn.
If selvages are not well tightened , you may
draw in leno yarns through an empty dent
adjacent to the one through which the leftmost
ground yarns
△
are drawn.
– At the right side of the machine
Draw in leno yarns
○
through an empty dent
adjacent to the one through which the right-
most ground yarns
△
are drawn.
Yarn type symbols:
○
Leno yarn
△
Ground yarn
▲
Waste-selvage yarn
Full-leno selvage yarn
Unwinding direction
Leno yarn
winding
direction
(1)
Leno yarn (which you should procure)
(2)
Leno yarn winder (Check whether you are
responsible for the preparation of this.)
ATTENTION
