Anisotropy of Strength in ABS-Resin Molding Parts : Relation between Orientation of Rubber Particles and Anisotropy of Strength

Abstract

The anisotropy of tensile yielding strength σ_Tb in each position of a ABS-resin injection-molded plate was investigated. As the result, the relation between σ_Tb and the tensile direction angle θ in each position was expressed by the following experimental formula : σ_Tb= A₀ + Acos2(θ+α), In this formula, A₀ was constant, being independent of the position in the plate. The values of A and α were measures of the anisotropy in strength and were controlled by the deformation aspect ratio of rubber particles, being dependent of the position of the ABS-resin plate.