Board material of ground plastics waste used for insulation against footsteps - is initially pressed for compression followed by a second press stage using pressure and heat

摘要

The board material, of ground plastics waste, is initially compressed in a press and finished in a second press with heat and pressure. After the first pressing, a web is laid over the board, to be pressed into it, in the second press stage. - The waste material for the board is textile fibres with a length of 5-30 mm and a diameter of 0.05-2.0 mm of natural and/or synthetic and/or a mixture of natural and synthetic fibres. The overlaid web is a nonwoven of polyester or polyamide fibres or a plastics film. Before the first press stage, the board material is mixed with a bonding agent of isocyanate or phenol resin or a synthetic polymer adhesive.