VESTAMID® – The Polyamide of Choice in Multilayer Tubing

VESTAMID® – The Polyamide of Choice in
Multilayer Tubing
Lower Hydrocarbon Emissions
As the market leader in materials for plastic
fuel lines, Evonik’s High Performance Polymers
Business Line has developed a series
of patented multi-layer tubing (MLT)
systems.
VESTAMID®, the world´s most popular
polyamide 12 for monowall fuel lines, is
used as a material in multi-layer tubing.
How well the barrier effect works against
permeation by hydrocarbons depends on
which barrier material is used. The barrier
layers are made of
• polyvinylidene fluoride (PVDF) - DYFLOR®
• ethylene perfluoroethylenepropene
copolymer (EFEP) - NEOFLON
• polybutylene terephthalate (PBT) -
VESTODUR®
• ethylene vinyl alcohol (EVOH)- EVAL
Today, fuel lines are made of MLTs to meet
current and future requirements:
• reduce hydrocarbon emissions
• properly handle electrostatic charges
• increase corrosion resistance
• provide excellent mechanical properties
Difference in barrier effect and price
A developer of MLTs basically has to work
with the following constraints:
• best possible barrier effect
• lowest possible price
• guarantee of physical and chemical
properties
The use of fluoropolymers or ethylene vinyl
alcohol is unavoidable if very low
permeation values are required for fuels
containing alcohol. Our MLT designs with
PVDF barrier layers are the systems of
choice by the U.S. automotive industry and
are responsible for lowering fuel line
emissions by more than 95 %.
Our MLT systems with EVOH barrier layers
are the most cost-efficient.
Our latest MLT systems with EVOH and EFEP
barrier layers combine benefits of two
different barrier materials:
• Good mechanical properties on the same
level with approved systems.
• Less permeation due to a combined effect
of two different barrier layer materials.
• Protection against aggressive substances
within the fuel due to an inner fluoric
layer.
• Better cost situation compared to MLT
solutions with thick EFEP inner layers.
VESTAMID® is a registered trademark of the Evonik Degussa GmbH
NEOFLON is a trademark of Daikin Industries, Ltd., Japan.
EVAL is a trademark of Kuraray Co. Ltd., Japan

Automobile manufacturers and system
suppliers have to decide which MLT satisfies
their own requirements at the best costperformance
ratio. To support our custommers
in this decision, we work closely with
them in the application of MLT systems,
thereby ensuring that the materials and MLT
design will meet the requirements of the
automobile manufacturer.
MLT without barrier layer
MLT 140
Conductive MLT for
applications requiring
performance of PA 12
monowall tubes
MLT 1000 with PBT barrier layer
MLT 1000
MLT with improved
permeation resistance
against alcohol-containing
fuels, good cold impact
performance, but limited
chemical resistance
MLT 4000 series with EVOH barrier layer
MLT 4300
MLT with very good
permeation resistance
against ethanol-containing
fuels, good cold impact
performance, but limited
chemical resistance
MLT 2000 series with PVDF barrier layer
MLT 2030
MLT with very good
permeation resistance
against alcohol-containing
fuels and excellent cold
impact performance
MLT 4500
MLT with very good
permeation resistance
against ethanol-containing
fuels and excellent cold
impact performance
MLT 2040
Conductive MLT with very
good permeation resistance
against alcohol-containing
fuels and excellent cold
impact performance
MLT 4540
Conductive MLT with
very good permeation
resistance against
ethanol-containing fuels
and excellent cold
impact performance

Optimum support through many years
of expertise
Our customers are supported by our technical
experts, from the initial concept until
the finished product is ready for mass production.
Our state-of-the-art facilities are
at your disposal; these include our cuttingedge
technical centers with injection molding,
mono and MLT extrusion machines as
well as our analytical labs, including permeation
measurement devices for film and
tubing.
MLT 7000 series with EFEP barrier layer
MLT 7000
MLT with very good
permeation resistance
against alcohol-containing
fuels and superior chemical
resistance
MLT 8000 series for cooling lines
MLT 8000
MLT 7040
Conductive MLT with very
good permeation resistance
against alcohol-containing
fuels and superior chemical
resistance of inner tube
surface. Also applicable for
aggressive bio diesel fuels.
MLT 7440
Conductive MLT featuring
two barrier layers with very
good permeation resistance
against alcohol-containing
fuels and superior chemical
resistance of inner tube
surface
High resistance against coolant liquids
Cooling line systems made of plastic
materials offer many advantages over
conventional metal systems or elastomer
hoses. Evonik has developed two multilayer
tubing systems for this application on
the basis of VESTAMID®.
The systems of the 8000 series, which have
diameters up to 30 mm and wall thicknesses
ranging from 1 to 1.5 mm, consist
of three layers. A polypropylene suitable for
the coolant tube application forms the inner
layer. On top of this sits an adhesion-promoting
layer, followed by an outer layer
made of the high-grade specialty polyamide
VESTAMID®.

Contacts
Your contact for Europe
Michael Böer
michael.boeer@evonik.com
Klaus Gahlmann
klaus.gahlmann@evonik.com
Your contact for the Americas
Bart Troyer
bart.troyer@evonik.com
Your contact for Asia
Peter Wong
peter.wong@evonik.com
® = registered trademark August 2011
This information and all technical and other advice are based on Evonik’s present knowledge and experience. However, Evonik assumes
no liability for such information or advice, including the extent to which such information or advice may relate to third party intellectual
property rights. Evonik reserves the right to make any changes to information or advice at any time, without prior or subsequent notice.
EVONIK DISCLAIMS ALL REPRESENTATIONS AND WARRANTIES, WHETHER EXPRESSED OR IMPLIED, AND SHALL HAVE NO LIABILITY FOR,
MERCHANTABILITY OF THE PRODUCT OR ITS FITNESS FOR A PARTICULAR PURPOSE (EVEN IF EVONIK IS AWARE OF SUCH PURPOSE), OR
OTHERWISE. EVONIK SHALL NOT BE RESPONSIBLE FOR CONSEQUENTIAL, INDIRECT OR INCIDENTAL DAMAGES (INCLUDING LOSS OF
PROFITS) OF ANY KIND. It is the customer’s sole responsibility to arrange for inspection and testing of all products by qualified experts.
Reference to trade names used by other companies is neither a recommendation nor an endorsement of the corresponding product, and
does not imply that similar products could not be used.
Evonik Industries AG High Performance Polymers 45764 Marl Germany
PHONE +49 2365 49-9878 www.vestamid.com