| 摘要 |
A heat-sensitive, three-dimensional thermoplastic layer is laminated to a thermoplastic substrate by a specific fusion bonding process which produces a laminate having substantially no thermal distortion. This process employs cooling to protect the three-dimensional structure from thermal damage and balancing of the heat flow from the substrate to prevent warpage. In the preferred process a grass-like sheet of low density polyethylene is fusion bonded to a rigid high density polyethylene substrate. |
