The development of the use of PP in the automotive industry started in the early 1980's in Western Europe. During the past twenty years, the quality and the durability of cars has grown steadily. New requirements from the customers led to new, more elaborate, specifications, which led to new polypropylene materials. On the other hand, the polymerization and extrusion processes have improved allowing PP to keep pace with these tighter specifications. In this presentation we will try to highlight the evolution of the PP materials in the past and to identify future trends, based on our experience with French OEMs as well as with other major European OEMs. We will examine the evolution of the structural properties as well as the aspect and end-use related properties. As PP was introduced in the cockpit, initially 30 % mineral filled PP compounds were chosen for interior trim and instrument panels. The original materials for the instrument panel were developed on the basis of medium impact copolymers modified with elastomers to improve irnpact resistance and filled with talc of particle size of D50 = 20 g. The original goal was reached: a good combination of stiffness and toughness; typical for these type of products is BMT 308. This material is still successfully used on some models for its low CLTE and good shape stability. Concerning the interior trim, the logical can be subdivided in three categories of parts corresponding to three types of material: low trim, high trim, door panels. For low trim, a high impact resistance is required even at low temperature, and as a consequence, impact copolymers are well suited for this application. For upper trim, the material chosen initially was also a 30% filled PP copolymer, but like I/P material the trend was toward lower talc contents. It is interesting to observe that German OEMs require 'softer' materials than their French counterparts for this type of application. For door panels, copolymers are used; one can observe here that the tendency is toward high toughness materials to satisfy the side impact requirement.


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    Titel :

    Our experience in interior trim and instrument panel PP materials for Western Europe


    Weitere Titelangaben:

    Unsere Erfahrung in PP-Werkstoffen für westeuropäische PKW-Innenausstattungen und -Armaturenbretter


    Beteiligte:
    Nachawati, N. (Autor:in) / Bormann, P. (Autor:in)


    Erscheinungsdatum :

    2002


    Format / Umfang :

    10 Seiten, 11 Bilder, 5 Tabellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Our Experience with Interior Trim and Instrument Panel PP Materials in Western Europe

    Bormann, P. / Nachawati, N. / Society of Plastics Engineers | British Library Conference Proceedings | 2002


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