Reducing noise and saving weight are often conflicting elements when engineering a new car, but JSP has developed a new form of its ARPRO sound-absorption material claimed to enable noise-reduction levels up to 10 times that of regular ARPRO.
ARPRO Porous is a closed-cell foam that is porous and provides a noise-reduction solution in a range of applications. It features air pockets, or voids, within a hollow cylindrical bead structure. The cylindrical beads weigh less than normal ARPRO beads yet retain the same structural integrity and resilience while resisting multiple impacts without damage.
As well as reducing noise and weight, the material also provides NVH benefits and is 100% recyclable.
"With the specification creep phenomenon increasing vehicle weight, noise reduction and other quality aspects have to be addressed without adding extra weight or harming quality and environmental performance," said Paul Compton, JSP’s Executive Vice President and Chief Operating Officer (Europe).
He added that with lower powertrain and road noise in most current cars, vehicle interiors had become the focus for NVH reduction: "JSP can tackle this issue with ARPRO Porous, reducing NVH while assisting in parts consolidation by eliminating the need for other packaging layers that compete for space in the car interior."
Compton stated that test results had demonstrated enhanced sound absorption with ARPRO Porous over normal expanded polypropylene: "Over a 400-Hz to 10,000-Hz frequency range, test findings show that ARPRO Porous is, at peak, up to 10 times more sound absorbent than normal ARPRO of comparable thickness and density. Other materials provide similar results but can weigh more and are not as flexible to shape or mold as ARPRO Porous."
He added that with demand for ARPRO expected to rise significantly, JSP expected further developments in tailoring the material for the automotive market. ARPRO anti-squeak and weight-saving seating solutions are two of many other derivatives that JSP has developed in collaboration with European OEMs and suppliers.