The board for indoor interior materials， the method of manufacturing it， and the indoor interior material using the board

The present invention relates to a board for interior building materials， the board comprising: a first grout/reinforcement layer; a core layer formed on the first grout/reinforcement layer; and a second grout/reinforcement layer formed on the core layer， uses a foam for the core layer， and can thereby provide a board for interior building materials that has excellent cushioning and sound insulation properties， can absorb shocks and is lightweight. In addition， the board for interior building materials of the present invention uses a foam for the core layer， and a non-woven fabric for the first grout/reinforcement layer and the second grout/reinforcement layer， and thermally-laminates the same so as to manufacture a board for interior building materials having the first grout/reinforcement layer and the second grout/reinforcement layer formed in a lower part and an upper part with the core layer as the centre， and can therefore provide a board for interior building materials having excellent water-resistance and grout-stability. The present invention relates to a board for interior building materials， the board comprising: a first grout/reinforcement layer; a core layer formed on the first grout/reinforcement layer; and a second grout/reinforcement layer formed on the core layer， uses a foam for the core layer， and can thereby provide a board for interior building materials that has excellent cushioning and sound insulation properties， can absorb shocks and is lightweight. In addition， the board for interior building materials of the present invention uses a foam for the core layer， and a non-woven fabric for the first grout/reinforcement layer and the second grout/reinforcement layer， and thermally-laminates the same so as to manufacture a board for interior building materials having the first grout/reinforcement layer and the second grout/reinforcement layer formed in a lower part and an upper part with the core layer as the centre， and can therefore provide a board for interior building materials having excellent water-resistance and grout-stability.