Лако-красочные материалы — производство

Animal glue-impregnated gasket materials are used as seals between two joined surfaces. They are water, oil, and solvent resistant, flexible, compressible, economical, and do not bond to the sealed surface. In the production of fiber or paper gaskets, the saturating procedure is carried out by drawing the fiber or paper stock through a shallow tank containing a glue-plasticizer solution. The saturated sheet then passes through squeeze rolls to remove excess liquid. It next passes through a second bath of hardening or curing agent (an aldehyde donor) and plasticizer. The sheet is then slowly dried under controlled conditions and cut into widely varied shapes.