Solid content of the MSF/AMSF adhesives
Solid content is a basic physical parameter that influences the performance of the adhesive. A lower solid content in the adhesive indicates that a larger water content has to be removed from the adhesive, which can damage the hot-pressing process (Gao et al., 2012). However, if the solid content of the adhesive is too high, it will lead to difficulty during the coating process where the adhesive cannot spread out uniformly resulting in a sharp decrease in the shear strength of the adhesive. A suitable solid content can improve the shear strength of the adhesive by preventing the adhesive from penetrating into the veneer. Therefore, a suitable addition of ATP needs to be determined. The solid content of the MSF/AMSF adhesives is shown in Fig. 1. As expected, the solid content of the MSF adhesive increased because increasing the ATP content is equivalent to increasing the dry base of the MSF adhesive. The solid content of the MSF adhesives increased gradually from 34.68% to
37.64% when the ATP content was increased from 0 to 5 wt%