This document discusses Polynt Group's hybrid sheet molding compound (SMC) technology for aircraft components. The technology combines SMC with fiber reinforcements that are processed in a single pressing stage, allowing for geometrically complex, highly functional components to be produced with short cycle times. It is characterized as economically efficient due to the automation and high material usage. The hybrid SMC materials must pass various qualifications for aircraft use, including mechanical properties, quality, reproducibility, and meeting fire resistance standards for cargo and cabin applications. Polynt Group works to innovate new materials and services to meet future market and customer needs for lightweight aircraft structures.

1. POLYNT GROUP
terials and manufacturing processes for secondary structures.
One auspicious technology is the combination of sheet mold-
ing compounds SMC basically produced by Polynt Composites
Germany GmbH with fiber reinforcements and pre-impregnated
continuous fiber reinforcements, which are processed in a sin-
gle-stage pressing. This hybrid composite technology is charac-
terized by the realization of geometrically complex, highly func-
tional components with low process cycle times.
The ability of full automation and the relatively high material us-
age make this technology economically efficient. The require-
ments for a flying structure are various. In general the qualifica-
tion of new products for new manufacturing processes is a big
challenge. These materials must be
qualified in terms of quality, reproduc-
ibility, mechanical behavior, flow be-
havior and further properties. Particu-
larly for cabin and cargo applications
special requirements such as flamma-
bility, toxicity and smoke density have
to be fulfilled.
The HUP27/25 GF fulfills the fire con-
tainment and fire resistance require-
ments of the aircraft cargo compart-
ments. An advanced version of this
mentioned SMC formulation, the so
called HUP63/25 GF, has been de-
veloped for cabin and interior appli-
cations.
Product innovation is one of Polynt
Group key success factor to be pre-
pared for future markets and needs.
The constantly work are focused on
a team content from product develop-
ment, technical responsible and sales
are working to offer the best servic-
es from the application idea thru the
manufacturing processes to find the
goal in the system integration of the
customer.
The increasing need for efficient passenger aircraft led to the de-
velopment of innovative lightweight designs and an increasing
demand on new lightweight materials. Due to the high weight
specific mechanical properties and the relatively high cost of raw
materials, semi-finished products and manufacturing process-
es the use of CFRP is limited on high performance applications,
especially for components of the primary structures of aircraft.
Due to lower mechanical loads, but high requirements on fire
protection, optics, surface quality and acoustics sandwich struc-
tures are used in most cases. In order to meet the increasing de-
mand for lightweight structures for cabin and cargo applications
the aerospace industry is working on improvements of new ma-
Hybrid sheet molding compound technologies for a new generation
of aircraft components