2.2. Evaluation of binderless board properties
The purpose of the experiment was to examine the self-bonding between particles from rice straw. Thus, internal bonding (IB) was evaluated with eight specimens of each manufacturing condition. Additionally, 24-h thickness swelling (TS) and water absorption (WA) were measured to determine the water resistance with five specimens of each manufacturing condition. The tests were carried out according to JIS A5905 (2014) and JIS A5908 (2003) standards.