METHOD FOR PROCESSING POLYMERIC MATERIAL AND DEVICE FOR CARRYING OUT SAID METHOD

摘要

The invention relates to a method and device for processing polymeric material by compressing said material at a pressure ranging from 0.7 to 100 MPa and on cooling. A consecutive breakdown is carried out by shearing the material under pressure and on cooling. The shearing is amplitude-modulated with a frequency ranging from 0.3 to 1000 Hz and a modulation index ranging from 0.05 to 1, a maximum value of the shearing stress being ranging from 1 to 50 N/mm<2>. The inventive device comprises a body (1), a pressure spiral conveyor (5) and a rotor (8) and is provided with a shearing stress modulator (7,15) which is arranged either between the pressure spiral conveyor (5) and the rotor (8), and/or on the inner surface of the body (1). The shearing stress modulator (7) is arranged between the pressure spiral conveyor (5) and the rotor (8) in such a way that it is rotatable and embodied in the form of an elliptic cylinder or a straight polygonal prism, or a rotation body provided with grooves which are embodied on the surface thereof. The shearing stress modulator (15) is arranged on the inner surface of the body (1) and has the form of an annular boss which is provided with longitudinal and inclined grooves embodied on the surface thereof. In the other embodiment, the device is provided with a two-element shearing stress modulator which is arranged in a grinding zone (6). The first element (16) of the shearing stress modulator is arranged between the pressure spiral conveyor (5) and a rotor (8), and the second element (17) of the shearing stress modulator is arranged on the inner surface of the body (1).