Stanyl® polyamide 46 (PA46), often used in non-automotive e-motor
end-laminates thanks to its thin-wall strength and heat resistance, finds its
first in-car use in an anti-blocking system (ABS) pump motor by Siemens VDO.
In the compact, newly designed e-motor, Stanyl resin enables a 0.4-0.6 mm,
ultra-thin-wall design that maximizes both the laminate size and the number of
wire windings. It provides a cost-effective way to optimize the motor assembly
process while insulating the wire windings electrically from the metal rotor
armature. The Stanyl end-laminate retains working rigidity and dimensional
stability up to 290 °C, higher than most thermoplastics subjected to wire
winding tension load.
In direct current (DC) e-motors, wire windings around metal rotor induce a
magnetic flux. This energy causes the motor armature to rotate within an
encompassing magnetic field, usually provided by permanent magnets around the
armature. Relatively speaking, Stanyl allows either thinner end-laminates,
which result in a more stable winding process, or larger e-motor sizes suited
for cost-effective usage of end-laminates. Ultra-thin end-laminates, which
position and insulate the wires using the smallest possible volume, help
reduce assembly and system costs due to the excellent toughness and flow of
the material.
"Stanyl resins have been used extensively in e-motors outside of automotive,
but Siemens VDO is providing the first purely in-car application," said
Richard Frissen, ADTS Manager Automotive for DSM Engineering Plastics. "When
Siemens VDO engineers began the search for the right material, they were aware
of Stanyl's suitability for high heat applications as a result of the
company's longstanding collaborative relationship with DSM. Together we were
able to design the right end-laminate for this need, one that provides a good
balance of economics and rigorous functionality."
Used in a broad range of demanding applications in automotive, electrical,
construction and other industries, Stanyl exhibits strength and stability at
high heat, plus good surface finish, chemical resistance, and resistance to
aging and deformation.
Stanyl is offered in a wide variety of grades including high flow,
abrasion-resistant, and unfilled (non-reinforced), as well as grades
containing glass fiber, minerals, lubricants, impact modifiers or
flame-retardants. Its higher crystallinity and a faster rate of
crystallization provides a technical edge over other engineering plastics,
including PA6 and 66, polyesters, semi-aromatic polyamides (PPAs), PPS and
LCPs. Compared to these, Stanyl grades show better heat resistance, mechanical
properties at elevated temperatures, wear and friction behavior and (with
faster cycle-time and increased flow) improved processing economics.
