Method for manufacturing high-density wood laminate material

A method for manufacturing a high-density wood laminate material, comprising:

• providing strands of woodbased material that are thin plate cut pieces of wood elongated in a fiber direction and having a density of 300 kg/m3 or more and less than 700 kg/m3,
• pretreating the strands of woodbased material by softening, compressing or squeezing the strands of woodbased material,
• orienting the strands of woodbased material such that fibers of the strands of woodbased material extend in a predetermined reference direction to form mats of the strands of woodbased material,
• stacking the mats of the strands of woodbased material in multiple layers to form a multi-layered mat of the strands of woodbased material, and
• pressing at a pressure of 4 N/mm2 or less to compress and bond the multi-layered mat,
• wherein the pretreating step is performed before the stacking step, the pretreating step including at least one of the following treatments on the strands of woodbased material:
• physical treatment in which the strands of woodbased material are physically compressed;
• high-frequency treatment in which the strands of woodbased material are irradiated with high-frequency waves so as to be dielectrically heated from inside and softened;
• high-temperature high-pressure treatment in which the strands of woodbased material are subjected to high temperature and high pressure;
• high-water pressure treatment in which surfaces of the strands of woodbased material are finely scratched by high-pressure water;
• and repeated deaeration and dehydration treatment in which the strands of woodbased material are saturated with water and then moisture is removed from the strands of woodbased material under vacuum conditions;
• and
• wherein the pretreating step is performed in order that the multi-layered mat pressed during the pressing step at the pressure forms the high-density wood laminate material with a density of 750 to 950 kg/m3.