The document discusses DREF yarns produced by NOR*FAB Corporation. DREF yarns are manufactured using a process that produces a yarn with a core covered by staple fibers, allowing for hybrid yarns combining properties of the core and sheath. NOR*FAB operates the largest collection of DREF spinning equipment worldwide. DREF yarns offer superior durability, abrasion resistance, and strength for applications such as cut protection, where DREF yarns with hardened cores provide significantly better cut resistance than traditional ring spun yarns.

1. DREF
Yarns
by
NOR*FAB
NOR*FAB
Corporation
1032
Stanbridge
Street
Norristown
PA
19404
USA
1-­‐800-­‐441-­‐9680

2. ¡ The
DREF
spinning
process
manufactures
yarns
composed
of
a
core
covered
completely
by
staple
fibers.
¡ Allows
creation
of
hybrid
yarns-­‐
combining
the
best
properties
of
core
yarn
and
sheath
fibers.
¡ DREF
yarns
provide
the
best
durability
as
compared
to
other
core
spinning
processes
¡ NOR*FAB
Corporation
operates
the
largest
collection
of
DREF
III
yarn
spinning
equipment
in
the
world.
¡ Yarn
sizes
ranging
from
41
to
1000
tex.

3. 1. Sliver
2. Double
Apron
Drafting
arrangement
3. Strand
4. Spinning
drums
5. Staple
Fibers
6. Yarn
7. Take
off
rollers

4. Fiber
Sheath
Core

5. ¡ Glass
¡ Wire
§ Stainless
Steel
§ Brass
§ Inconel
¡ OPF
(Oxidized
Pan
Fiber)
¡ Aramids

6. ¡ Para-­‐Aramid
¡ Meta-­‐Aramid
¡ Novaloid
¡ PBI®
(Polybenzimidazole)
¡ Modacrylic
¡ Acrylic
¡ FR
Rayon
¡ Rayon
¡ Blend
of
above
fibers
PBI®
is
a
registered
trademark
of
PBI
Performance
Products
Inc.

7. Yarns
for:
¡ Braiding
¡ Knitting
¡ Weaving
¡ Wire
&
Cable
¡ Cut
Resistance
¡ Clutch
Facing
&
Brake
Linings
¡ Thermocouple
Insulation
¡ Aerospace

8. ¡ DREF
yarns
provide
superior
abrasion
resistance,
durability
and
strength.
¡ Enables
the
development
of
individually
engineered
yarns
to
meet
customer
needs.
¡ Superior
cut
resistance
as
compared
to
ring
spun
yarns
§ Allows
for
hardened
cores
such
as
fiberglass
and
wire
to
further
enhance
cut
resistance
¡ Excellent
thermal
insulation
¡ Outstanding
value
versus
lower
performing
yarns

9. Fabric
Cut
Protection
(ASTM
1790-­‐97,
CPPT
(g)
100%
Para-­‐aramid
ring
spun
fabric
700
g
Hybrid
Ring-­‐Spun
/
DREF-­‐Spun
woven
fabric
with
3200
g
hardened
core,
such
as
NOR*FAB
CutPro™
Style
10TT366
Ø The
example
above
compares
Para-­‐Aramid
woven
fabrics
of
similar
weights
except
that
Style
10TT366
is
woven
with
DREF-­‐Spun
yarns
that
have
a
core
of
stainless
steel.
The
result
is
an
improvement
in
Cut
Resistance
of
450%.