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extruding, mixing and placing the chemical two components are co-extruded from the European Technical Approvals
bonding material there have been numerous capsule directly into the mixing nozzle. A significant number of the resin
innovations to, and variations in, the design of The CIC concept is used for two-component
systems currently on the market have
the cartridge. Generally, these variations have resin systems with ratios of 5:1 to 10:1, but
achieved the important status of having
been produced not to replace or supersede with careful formulation and production control
European Technical Approval, in accordance
earlier versions, but rather they have been by the manufacturer this range can be
with ETAG 001 Part 5, the vast majority being
developed to address differing requirements widened to 3:1 to 20:1.
injection systems. In achieving this ETA a
for different market areas. In some cases the
product is typically tested and approved for
developments have been driven by the “Splitter” (“Peeler”) cartridge
chemistry of the bonding resin (e.g. ratio of
one specific bond length within the range of
This cartridge is a direct derivative of the
components) and in others by specific
8 to 12 times the anchor diameter. There are
two-component co-axial cartridge, but instead of
application requirements (e.g. pack size,
some products on the market that have been
using two concentric pistons extruding the
applicator gun).
tested and approved for use at any bond
components it has only one, and therefore it can
length within this range, thus giving the
be used
Twin cartridges (side-by-side and co-axial) end-user more choice in his design, and
with a
The earlier (and, probably, still the most
“Splitter”
making the most of the variable bond length
common) types are represented by the side-
high
(“Peeler”) cartridge
advantage that injection systems have over
by-side cartridge, often used for the 1:1 to
power
capsules. In future the bond lengths
3:1 epoxy resin systems and 1:5 ratio
single
allowed by the ETA system will extend from
vinylester (epoxy-acrylate) systems, and the
plunger gun.
4 to 20 anchor diameters, further extending
co-axial (one rigid tube inside the outer)
This single
1
the flexibility and application range of
cartridge, usually used for the 10:1 piston [1] is
injection systems.
polyester and vinylester systems. fitted with
Because of their twin-piston
method of extruding the components
The future
from the cartridge most of these, and their
2
Manufacturers are very much
volume and ratio variants, require the use of
aware of the “easy to use”
special twin-plunger guns, although the
principle, and they are investing
smaller (150ml) version of the coaxial
ever increasing resources in
cartridge can be used with an adaptor which developments to simplify still
a special
permits its use in a standard single-plunger
2
further the use of cartridges for
(“Mastic”) skeleton gun while another, using
splitting device
resin-bonded anchors.
a screw-in plunger, requires no gun at all.
[2]; in use, pressure on
The latest cartridge designs, associated
the piston causes the device
as they are with low-cost applicator guns or
Capsule in Cartridge (“CIC”) system
to cut, split and separate the centre
even without any gun, are already leading
This system was introduced to allow the
tube, in effect peeling it back, to allow the
to a wider use of these systems throughout
use of an industry standard single-component free passage of the piston along the length of
the construction and building industries, and
skeleton (mastic) gun, thus eliminating the the cartridge and thus extruding the two
this growing market can now be serviced
need for a dedicated applicator gun. For its components correctly into the mixer/delivery
design it drew upon the proven technology
through specialist distributors and DIY stores.
nozzle.
of the soft-skin capsule, and married this
with the application techniques of the
Tandem cartridge
co-axial cartridge.
The tandem type of cartridge contains the
The CIC consists of the capsule [2], which
two components packed into compartments
holds the two chemical components in
1
one behind the other [1], separated by a
separate longitudinal
compartments, contained
fixed seal; each compartment has an
1
within an outer rigid
interlinked piston [2], and both move at the
cartridge [1] which is
same rate, in tandem.
fitted with a
The component in the
single piston. In
1
rear compartment
2
use, the plunger extrudes via a
of the standard concentric tube from
the fixed (separating) seal
3
to the cartridge outlet, and
at the same time the forward
component is extruded directly
gun
3
drives the 2
to the outlet [3].
Due to the complexity of
piston, and the
manufacture these cartridges are
available in a very limited range of
Capsule in cartridge
sizes, and at mixing ratios of 1:1 and
Tandem cartridge
system
2:1.
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