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 MT
is a thermoplastic prepreg which offers better mechanical properties
than injection molded reinforced thermoplastic thanks to the higher
residual length of the glass strands. GMT is widely used in automotive
applications in under-body shields, seat structures, front-ends, etc.
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GMT is obtained by consolidation of a glass
strand mat and a sheet of polypropylene. The glass mat is obtained
by chopping assembled rovings and needling the mat. The intermediate
product is delivered in the form of rigid sheets which are molded
by the end user.
The GMT is transformed by heating the sheets to the matrix softening
temperature, usually in an infrared oven. The pre-heated sheets are
then molded by compression in a mold at a lower temperature. During
the molding GMT flows inside the mold cavity, enabling complex features
to be incorporated. GMT permits a high level of automation during
blank cutting, pre-heating and introduction in the mold.
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Click on picture to enlarge. |
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Asia
Pacific
