| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to production of construction materials, particularly, to light three-ply boards including foamed polymer filler. Proposed board comprises top and bottom plies with filler glued in place there between. Filler reinforced discrete elements shaped to stiffness are arranged at areas to sustain increased loads. Areas reinforced with discrete elements inside shaped plies are composed of hollow cases located in definite order above bottom ply with glue layer. Invention covers also the production of said boards.EFFECT: higher hardness, longer life.2 cl, 5 dwg |
