Developed jointly with Japan Polypropylene Corporation,
the new resin material maintains the same rigidity as parts made with conventional
ones, while achieving significant weight
reduction, since it allows making parts thinner than those using conventional
This does not reduce only the weight of parts
themselves, but also the quantities of resin and
energy needed to manufacture these parts. When the material is used for both front and rear bumpers, it contributes to
their weight reduction by approximately 20%.
This reduced thickness allows for a shorter cooling period for
moulding, and by using computer-aided engineering (CAE) technology, the fluidity of the resin material has also been
optimized during the production process.
new resin material maintains the same rigidity as parts made with conventional
one, but with significant weight
reduction (parts get thinner), with
moulding time (halved from 60 to 30 seconds), leading to reductions
also in the amount of energy consumed in the production
As a result, bumper
moulding time has been halved from 60 to 30 seconds,
hence the other reductions in the amount of energy consumed in the production process.
bumpers weight has a significant impact on fuel economy,
driving performance and dynamics, they also are multi-functional, requiring both rigidity to absorb impact, and
moulding and painting properties suitable for exterior design.
explains that it blended two components found in polypropylene and rubber, the constituents of resin, that have different properties, and succeeded in distributing them in a double-layer structure in line with the required function for the surface and the inside of the base bumper material.
This gave the surface a good paint film adhesion while
the inner section retains high rigidity and impact absorption, with reduced thickness.
Mazda plans to adopt
this technology for bumpers in vehicles with engine
displacement of 1500 to 2000 cc.