The TPE compound used as matrix in the preparation of
the composites followed a typical commercial formulation,
containing high level of oil (157.7 phr) and a considerable
amount of PP (35.5 phr). This material can be characterized
as a very soft TPE compound with 37 Shore A hardness. The
addition of wollastonite slightly increased hardness. The
composition containing 7 phr wollastonite showed hardness
39 in the Shore A scale, allowing its use in the same
applications as the TPE matrix