TWO-LAYER SHEET MATERIAL AND METHOD OF ITS APPLICATION Russian patent published in 2012 - IPC B32B15/08 B22F7/02 

FIELD: process engineering.

SUBSTANCE: invention relates to production of composite materials, particularly, to two-layer sheet material and to method of its fabrication. Two-layer sheet material comprises metal substrate from aluminium and layer of PTFE. Metal substrate is made from aluminium powder and bonded with the layer of PTFE powder layer over the entire surface of contact by blast extrusion to produce wavy surface of bond. Proposed method comprises producing metal substrate, applying polymer coat from PTFE and thermal treatment. Aluminium powder is used as substrate material. Application of polymer coat is accompanied by blas extrusion using sliding shock wave at the pressure of 0.5-0.7 GPa and with shock pulse duration of, at least, 35 mcs while thermal treatment is performed at 400°C and 0.6-0.7 MPa.

EFFECT: higher adhesion due to PTFE blast shock wave effects.

2 cl, 3 dwg, 1 tbl, 1 ex