EKamold BORON NITRIDE RELEASE
AGENTS FOR ALUMINUM EXTRUSION
®
EKamold® boron nitride
Electrostatic powder coating
( Boron Nitride )
products provide indispensable assistance at critical
points in the extrusion
Container
process, ensuring a smooth
Dummy block
process flow and producing
immaculate profile surfaces.
Aluminum billet
Properties
The starting material for extrusion is a
cylindrical aluminum billet. Individual
sections of these blocks are heated to
450 °C and forced by a stem through to
stick at these temperatures. It is therefore necessary to apply a release agent
or lubricant between the dummy block
and the aluminum billet.
Conventional release agents, such as
oils, greases and carbon black contaminate the product and are difficult to use.
Hexagonal boron nitride from ESK offers
excellent properties as release agent
and lubricant and is easy to apply.
ESK developed EKamold® P2 boron
nitride powder, EKamold® WP suspensions and EKamold® Extrusion Spray for
the aluminum extrusion.
Advantages
• Outstanding release properties and
lubrication
• Improved safety and cleanliness in the
press area: no open gas flames
• Economical powder consumption
•Optimized binder improves adhesion
on hot surface
• Reduced coating frequency: shorter
downtimes
• Increased productivity
• Optimized product quality
•Long lasting corrosion protection of
mold
• Not harmful to health
Applications
Specification EKamold® P2
Availability
in the extrusion process, EKamold®
boron nitride products provide indispensable assistance, ensuring a smooth
process flow and producing immaculate
profile surfaces:
Powder
•EKamold® P2 is available in 2 kg
plasic bags
• EKamold® Extrusion boron nitride
spray coated surface of the die
bearing ensures maximum precision
and a clean appearance on the profile
surface.
•EKamold® WP boron nitride supspension can be used as released agent
on the preheated aluminum billet by
spraying as an alternative to Ekamold®
P2 powder.
•The EKamold® WP boron nitride
suspension coating on the shear
blade prevents sticking and ensures a
perfect cut at the end of the extrusion
cycle.
The improvements in productivity and
quality can benefit extrusion operations.
Symbol
/Unit
Chemical formula
EKamold® P2
BN Powder
BN
Crystalline structure
hexagonal
Specific weight
[ g / cm3 ]
2.25
Electrical resistace
[ Ω cm ]
> 1012
Purity (B+N)
[ % ]
> 98.5
Oxygen (O2 )
[ % ]
< 1.5
Boron oxide (B2O3 )
[ % ]
< 0.5
Carbon (C)
[ % ]
< 0.1
Metallic impurities
[ % ]
< 0.2
Mean grain size d50
(primary particles)
[ µm ]
7
Specific surface
area (BET)
[ m 2/g ]
5 - 15
Application
temperature
[ °C ]
900 in air
•EKamold® Extrusion spray is filled in
500 ml spray cans
•EKamold® WP is available in
polyethylene canisters of 10 kg
capacity.
Storage
•Containers must be tightly closed and
protect from heat
•Guidelines for the storage of
flammable liquids must be followed
• Keep cool and dry
• Protect from frost
Formula EKamold® Extrusion
Safety
Spray
Because of the ethanol content
of EKamold® Extrusion spray, this
product is highly flammable and thus
a hazardous substance in terms of the
Ordinance on Hazardous Substances.
•≤10 % boron nitride powder (spray)
• Binder: Bentonite
• Solvent: Ethanol
• Propellant: Propane and butane
Formula EKamold® WP
The processing regulations and safety
measures applicable to dealing with
flammable liquids must be strictly
followed.
For more information see the DIN Safety
Data Sheet.
Suspension
•≤12 % boron nitride powder
• Binder: inorganic
• Liquid phase: water
The data presented in this leaflet are in accordance with the present state of our knowledge, but do not absolve
The management system has been certified according to
the user from carefully checking all supplies immediately on receipt. We reserve the right to alter product constants
DIN EN ISO 9001, DIN EN ISO 14001. EKamold® is a registered
within the scope of technical progress or new developments. The recommendations made in this leaflet should be
trademark of ESK Ceramics GmbH Co. KG
checked by preliminary trials because of conditions during processing over which we have no control, especially
where other companies’ raw materials are also being used. The recommendations do not absolve the user from the
obligation of investigating the possibility of infringement of third parties’ rights and, if necessary, clarifying the position. Recommendations for use do not constitute a warranty, either express or implied, of the fitness or suitability of
the products for a particular purpose.
ESK Ceramics GmbH & Co. KG
Max-Schaidhauf-Straße 25
87437 Kempten, Germany
www.esk.com, [email protected]
PL / EKamold® aluminum extrusion / e - 06 · 2013
• Electrostatically applied EKamold®
P2 boron nitride powder is the ideal
release agent between the aluminum
dummy block and billet.
Typical Material
Properties