Abstract: A method for making sheets and/or plates that are thermoformable as of a temperature of 80-90° C. and heat-tackifiable as of 80-90° C., and suitable for use as a heat-tackifiable reinforcing material. According to the method, 30-70 wt % of granules of one or more polymers that have a low melting point (50-90° C.) and are thermoformable as of 80-90° C. are mixed with 70-30 wt % of one or more polymers with a higher melting or softening point, in the form of granules or a powder having a particle size greater than around 500 &mgr;m, and preferably of 500-1000 &mgr;m, both kinds of polymers being thermoplastic and at least partially compatible, and optionally with the usual additives; the mixture is extruded under low-shear conditions at low temperatures of 100-140° C.

Abstract: A method for making sheets and/or plates that are thermoformable as of a temperature of 80-90.degree. C. and heat-tackifiable as of 80-90.degree. C., and suitable for use as a heat-tackifiable reinforcing material. According to the method, 30-70 wt % of granules of one or more polymers that have a low melting point (50-90.degree. C.) and are thermoformable as of 80-90.degree. C. are mixed with 70-30 wt % of one or more polymers with a higher melting or softening point, in the form of granules or a powder having a particle size greater than around 500 .mu.m, and preferably of 500-1000 .mu.m, both kinds of polymers being thermoplastic and at least partially compatible, and optionally with the usual additives; the mixture is extruded under low-shear conditions at low temperatures of 100-140.degree. C.