| 摘要 |
FIELD: valuable documents. ^ SUBSTANCE: document card consists of the base (10), the coating (5) on one side of the base (10). The base material contains high density polyethylene (HDPE) and linear low density polyethylene (LLDPE). The coating material contains polycarbonate. The base and the coating are connected by the means of thermal glue. ^ EFFECT: increase of breakage resistance of the document card. ^ 15 cl, 1 dwg |
