INHIBITION OF BOND-LINE READ-THROUGH IN JOINED DUAL LAYER THERMOSET ARTICLES

摘要

A vehicle component including a first cured layer of a molding composition having chopped glass fibers as a majority by volume of the fiber filler. A second cured layer of molding composition is provided that has carbon fibers as a majority by volume of the fiber filler. An adhesive applied is as liquid or paste joining the first cured layer and the second cured layer. The adhesive has a Modulus of between 600 and 800 MPa with an elongation of about 70% as determined by ASTM D638 and a CLTE between 50 and 90 µm/m-°C in a temperature range of -30°C to 0°C and 255 µm/m-°C in a temperature range of 100°C to 130°C as determined by ISO MAT-2208, and a thickness such that no bond-line read-through (BLRT) is observable in an outer surface of said first cured layer with an unaided, normal human eye.