Ethylene/alpha-olefin copolymer elastomers based on Constrained Geometry Catalysts (CGC) exhibit a number of physical properties, which make them extremely useful for flexible thermoplastic olefin (f-TPO) automotive interior applications. Due to the low level of unsaturation in these polymers, they exhibit a high level of heat and UV aging resistance. Their molecular architecture enables these polymers to exhibit low glass transition temperatures (Tg); thus, compositions containing these polymers exhibit very good low temperature impact properties. Cost effective, thermoformable compounds have been developed using these elastomers. Flexible TPO sheets are manufactured by either extrusion or calendering. These two processes have a different set of requirements to ensure optimum manufacture. Consequently, the type of compounds required for these two processes will differ. This paper will examine these two sheeting manufacturing methods, with emphasis on the calendering process. An approach on how to determine optimum thermoformable compounds for these different processes will be discussed. The effects of ethylene/1-octene copolymer, oil, peroxide, and coagent in rheology modified EO/PP blends on elevated temperature stress-strain and melt strength properties were determined using a hybrid mixture-factorial model. In general, the correlation coefficient was good to fair, indicating good to fair correlation with the data. The best visual quality calendered sheeting was obtained using higher levels of PP, higher melt flow PP, and higher levels of OIL. The constraints for these higher levels (lower EO levels) will be the desired sheet hardness, ultimate tensile strength, fogging resistance needs, and cold temperature impact resistance. Poor correiations were found between compound viscosity, compound melt elasticity, and calendered sheet quality. Several additives were observed to yield good roll release, when used in the EO/PP based compound.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Development of thermoformable ethylene/alpha-olefin copolymer elastomer compounds for optimum sheeting manufacture


    Additional title:

    Entwicklung thermoformbarer Ethylen/Alphaolefin Copolymer Elastomerverbundstoffe für die optimale Herstellung von Verkleidungen


    Contributors:
    Walton, K.L. (author) / Weaver, L.B. (author) / Ellerson, J.R. (author) / Gisler, E.S. (author) / Vercuski, P.C. (author) / Larson, S.F. (author)


    Publication date :

    2002


    Size :

    15 Seiten, 8 Bilder, 6 Tabellen, 9 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    New Ethylene/Alpha-Olefin Copolymer Elastomers for Automotive Interior Applications

    Walton, K. L. / Laughner, M. K. / Pomije, J. D. et al. | British Library Conference Proceedings | 2000


    Developments in Thermoformable TPO Materials

    Reid, C. / Mahan, M. / Society of Plastics Engineers | British Library Conference Proceedings | 2001


    Foam insulation with thermoformable film coating and process for manufacture

    DAYTON JEREMY / MARSH ROBERT / PRYBUTOK ROBERT | European Patent Office | 2020

    Free access

    THERMOFORMABLE DECORATIVE MATERIAL

    JOHANNA SPOERL / LI FENG / ARUN PRASAD VENUGOPAL et al. | European Patent Office | 2021

    Free access

    FOAM INSULATION WITH THERMOFORMABLE FILM COATING AND PROCESS FOR MANUFACTURE

    DAYTON JEREMY / MARSH ROBERT / PRYBUTOK ROBERT | European Patent Office | 2017

    Free access