E.i. Dupont De Nemours and Company

Philippe Leboeuf

Karl Paul Maurer

Daniel P Jones

Michel C Renaud

Jean-Michel Philippoz

Georgios Topulos

Vincent Descombes

Serge Cavalli

Klaus Bender

Michael C Renaud

Jean-Michael Philippoz

Guillaume Doy

Miroslav Palicka

Disclosed is a muffler assembly including: a) polymeric housing having an interior surface and at least one opening for at least one inlet and one outlet exhaust pipe; b) at least one metal inlet exhaust pipe and at least one metal outlet exhaust pipe positioned within the openings to provide housing-exhaust pipe interfaces; c) a thermal insulating material coating the interior surface of the polymeric housing and extending through the housing-exhaust pipe interfaces; wherein the thermal insulating material seals the muffler assembly at the housing-exhaust pipe interfaces; and wherein the muffler assembly has a leak rate of 105 Liters/minute or less at 4.5 psig pressure. An optional muffler assembly has body mounting adapters attached to the inlet and outlet exhaust pipes and positioned within the openings to provide housing-body mounting adapter interfaces. Also disclosed are processes for manufacturing the muffler assemblies.

Lightweight polymeric exhaust components

A muffler assembly including one or more exhaust pipe(s), a polymeric housing carried by at least one of the exhaust pipe(s); a thermal insulating layer lining the housing interior surface and extending between the housing and exhaust pipe at the housing-exhaust pipe interface; wherein the thermal insulating layer includes a nonwoven fabric; wherein when the fabric is exposed to heat, the fabric increases in thickness to seal the muffler assembly at the housing-exhaust pipe interface and provides thermal insulation to the polymeric housing.

Muffler assembly and process of manufacture

The invention relates to a new polymer blend comprising: The polymer blend of the invention is particularly suitable for blow-moulding, to make parts for high-temperature, high-oil-exposure uses.

Thermoplastic vulcanisate blend

Molding process using gas under pressure

Growing community of inventors

St Maurice, France

Philippe Leboeuf