| 摘要 |
<p>A thermoformed plastic product, such as a truck bed liner (60), having an antislip surface is formed. A clean surface of a sheet of, for example HDPE, is masked. Droplets of a sprayable or liquid polymer, such as a thermosetting elastomeric polymer are sprayed or otherwise applied onto the exposed masked off surface area. The droplets form a stippled pattern of primarily separate bumps which upon hardening are hard, but not brittle. After partial hardening of the bumps, the plastic sheet is thermoformed. Thermoforming tightly bonds the droplets to the sheet and further hardens the droplets into asperities (64, 65). Some asperities (65) containing entrapped air explode during thermoforming resulting in rough edges (66).</p> |
