Production of particle boards from recycled wood

Ugotavljali smo, kako delež recikliranega iverja vpliva na mehanske lastnosti ivernih plošč, na debelinski nabrek in emisijo formaldehida. V laboratorijskih pogojih smo izdelali iverne plošče z 0 %, 33 %, 66 % in 100 % recikliranega materiala. Največjo upogibno trdnost in modul elastičnosti smo ugotovili pri iverni plošči iz 33 % recikliranega materiala. Najmanjšo upogibno trdnost je imela plošča iz 100 % recikliranega, najmanjši modul elastičnosti pa plošča iz 66 % recikliranega materiala. Razslojna trdnost je bila najboljša pri plošči iz 100 % recikliranega, najslabša pa pri plošči z 0 % recikliranega materiala. Najmanjši debelinski nabrek smo ugotovili pri plošči iz 66 % recikliranega, največji debelinski nabrek pa pri plošči z 0 % recikliranega materiala. Najmanjša emisija formaldehida je bila ugotovljena pri plošči iz 33 % recikliranega, največja pa pri plošči iz 0 % recikliranega materiala.We researched the influence of the proportion of the recycled particles on the mechanical properties of particle boards, thickness swelling and emission of formaldehyde. In laboratory conditions, we made particle boards with a 0 %, 33 %, 66 % and 100 % recycled material. Good flexural strength and modulus of elasticity was found in particle board from 33 % recycled material. The lowest flexural strength had the board made from 100 % recycled material, and the lowest modulus of elasticity had the board from 66 % recycled material. The best internal bond strength had the board from 100 % recycled material, while the board made of 0 % recycled material had the lowest. The minimum thickness swelling was found in the board from 66 % recycled material, the maximum thickness swelling was found in the board with 0 % recycled material. The smallest emission of formaldehyde was detected in the board from 33 % recycled material, the highest in the board from 0 % recycled material