... price, Superfine inflexibility, not chapped or broken off for inflexion (insole paper board, cellulose board) 1) Applications: A) Shoes industry: Fit ... , schoolbags and notebooksD) Synthetic leather: Base materials for PVC and PU plying-up2) Inflexibility: Superfine inflexibility, not chapped or broken off ... stress: 0.5kN/cm213) Flexure index: ≥1.914) Moisture: ≤10%(insole paper board, cellulose board ...