a step forward in the metal replacement
A great interest towards the
use of high performance structural thermoplastics
is promoted today by the need of winning technical
solutions and the steady growth of metals prices.
The introduction of injection moldable high
performance compounds featuring excellent mechanical
properties involves, as a matter of fact, good
advantages for both the production techniques
and the preservation of environment and workers'
In order to be always proactive towards the
Market, LATI has introduced new grades in its
Special Materials range which can be considered
a true reference in the most demanding structural
Following the project requirements, LATI offers
compounds specifically engineered to feature
the best load at break and elastic
modulus available today.
Following this path, it is plain that engineers
can correctly address design operations from
the very beginning when a correct metal replacement
solution is required.
Unfavorable compromises, as the use of composite
or metal components, inserts and mountings,
can be saved up.
Besides, the wide range of LATI thermoplastic
compounds also allows to select suitable neat
resin leading to an adequate solution of the
most critical environmental factors, from high
temperature to chemical attack etching, through
moisture exposure and adverse climatic conditions.
a brand new family of compounds offering outstanding
elastic modulus, almost twice the value of ordinary
glass or carbon fibers products.
Their formulation has been conceived to reinforce
the thermoplastic matrix with high loads of
special purpose carbon fibers, as these generally
used in the aerospace industry.
virtually not deformable compound can perfectly
fit in different industrial sectors where the
compliance with tolerances and geometrical dimensions
is mandatory, such as aerospace, precision mechanics,
electronics, textile machines, military, pneumatics,
special valves, etc.
The resulting materials allow to create parts
offering very low deformations under load.
For these reasons, ultra-stiff materials are
the ideal candidates for composites and metal
alloys replacement in applications where their
usage is planned more on the basis of non-deformability
rather than high load at break or toughness.
Ultra-stiff materials are exclusively offered
on high performance resins: PPA, PPS, PAs
metals are often used where heavy mechanical
stresses are expected, such as shear, bending
or torsion stress.
The capability of sustaining very high loads
is part of LATI proposal, achievable by the
usage of reinforced products with high contents
of glass fiber.
The well-established proposals are the ones
based on PA6, PA66 and PPS reinforced compounds
with 40, 50 or 60% of glass fiber.
These products feature a very interesting performance/cost
Nevertheless polyamides show issues related
to moisture uptake and working temperatures,
as well as PPS is limited from well known little
elongation at break and poor toughness.
In order to get round these disadvantages,
LATI has introduced the LARAMID G/60,
a PPA based grade reinforced with 60% of a special
glass fiber whose mechanical performances are
a matter of fact LARAMID G/60 is able to reach
a load at break of 280 MPa, offering
a strength 25% higher than the ordinary PA66
compounds with the same formulation and 40%
higher then similar grades based on PPS.
Furthermore, the remarkable elongation at break
shows the compound capability to support imposed
deformations without occurring into yielding
phenomena. An interesting application is represented
by parts in the pipe-and fitting sector, plumbing,
frame structures, etc.
the base resin offers peculiar advantages as
very low moisture absorption, high chemical
inertia towards organic products as well as
the most of acids and bases, highly remarkable
thermal performance allowing the compound to
behave without any change well above 150°C
(continuous use temperature).
For these reasons LARAMID G/60 is the best
candidate for the replacement of aluminum and
its alloys, steel or as the ideal substitute
of brass in the manufacturing of valves and
pipe fittings, as well as under for parts dealing
with the under-the-hood environment in the automotive
sector, electronics, ecc.
IMPROVED AESTHETIC STRUCTURAL MATERIALS:
nowadays more and more extreme mechanical applications
have to offer an improved aesthetic of the molded
For this reason LATI has introduced in the market
a range of tailor-made structural compounds
named LATIGLOSS, whose peculiarity is a special
formulation allowing them to provide a glossy
and defect-free surface finish.
LATIGLOSS are PA6 and PA66 based compounds
reinforced with 30-60% of glass or 30% carbon
fibers, a feature boosting upwards mechanical
performances but not generating any longer the
typical fiber streak marks that trouble the
ordinary reinforced products.
With LATIGLOSS materials not only a better
surface finish is easily achievable, but
even the dimensional stability gets improved
thanks to a better and more homogeneous shrinkage.
Besides, special versions with improved flammability
behavior are today available and grades for
water and food contact applications are on-the-go.
The surface finish that can be obtained with
the improved aesthetic structural materials
makes hard to compare LATIGLOSS with a standard
high reinforced product.
appearance is in fact perfectly regular even
for colored versions, low roughness gives better
sliding to moving parts but, above all, it gives
the opportunity to avoid aesthetical optimization
of the molded items as painting, metallization
or over-molding techniques.
Nevertheless the LATIGLOSS grades are anyway
suitable for aesthetical post-manufacturing
processes, as shown by the recent chomium plating
tests (rif., picture).
The right trade-off between mechanic, thermal
and aesthetic properties, the good dimensional
stability and the ease of transformation can
identify the LATIGLOSS family as the perfect
substitute of more expensive compounds like
semi-aromatic polyamides or similar blends,
specially as long as working conditions do not
require any specific mechanical performance
at high temperature.
The cost-related advantages must not be identified
just in the cost of the neat resin, but can
also be found in the easier and cheaper molding
01 July 2008
LATI Industria Termoplastici S.p.A.
Via F. Baracca, 7 21040
Vedano Olona (VA) - Italy
Tel. : +390332409111 - Fax: +390332409307