4
Date : April 1999
Dual Lock Fastening System
Attachment/Application
Pressure-sensitive: Apply
above 20°C. Surface must
be clean, dry and free from
oil. Allow 48 hours
(SJ3541/2) or 72 hours
(SJ3551/2) for maximum
bond strength. Improved
resistance to edge peel can
be provided by recessing
the Dual Lock fastener, or
by rounding the corners. In
some exceptional cases
(contamination by mould
release, rough or porous
surfaces etc) it may be
necessary to sand or abrade
the surface, or use an
adhesive primer to optimise
bond performance.
Mechanical Attachment:
Staples or other methods of
mechanical attachment may
be used either alone
(SJ3441/2) or in conjunction
with the pressure sensitive
adhesive (SJ3541/2,
SJ3551/2) to give additional
holding strength, particularly
at elevated temperatures or
on rough or porous
surfaces.
Ultrasonic Sealing: May be
used to permanently fuse
non-adhesive products
(SJ3441/2) to themselves or
polypropylene surfaces in
about one second.
Sewing: Use extra strong
nylon, cotton-covered
polyester, or waxed cotton
thread as for buttons,
carpets, or very heavy
fabrics. Sew along all
edges with a two-thread
lock stitch, using 6-8
stitches per inch, or use a
box stitch.
Product Information Backing/Substrate Selection
Plain-Backed
Sew-On
Pressure-Sensitive Adhesive Backed
Substrates SJ3440 SJ3441 SJ3442 SJ3540 SJ3541 SJ3542 SJ3550 SJ3551 SJ3552 SJ3560
Bare Metal
ü ü ü ü ü ü ü
Painted Metal
ü ü ü ü ü ü ü
Finished Wood
ü ü ü ü ü ü ü
Plastics : ABS
ü ü ü ü ü ü ü
Polystyrene
ü ü ü ü ü ü ü
Acrylic
ü ü ü ü ü ü ü
Polyethylene
ü ü ü
Polypropylene
ü ü ü ü ü ü
Polycarbonate
ü ü ü ü ü ü ü
Rigid Vinyl
ü ü ü ü ü ü ü
Plasticised
Vinyl
ü ü ü ü ü ü ü
