Glass Mat Reinforced Thermoplastics(GMT)
 GMT (Glass Mat Thermoplastic) is a multi-step process. First, a needled mat is used or a mat is formed in-situ by chopping assembled roving. Then, one or two layers of reinforcing mat are sandwiched between two or three sheets of polypropylene. This sandwich is then heated and consolidates into a semi-finished sheet product. The GMT sheets are then heated and molded using stamping or compression process to make complex finished parts.