| 摘要 |
The method of stiffening a selected area of sheet material such as a shoe part in which a layer of molten synthetic polymeric material is coated on the area to be stiffened, rigid, preferably heat-softenable, granules are applied to the coating layer while the coating material is soft to cause the granules to adhere, the sheet material is pressed against a second sheet with the coating and granules between the sheets and with the coating in heat softened condition to force the coating material through openings between the granules and into wetting engagement with the second sheet and the polymeric material is cooled to form a layer of hardened polymeric material with the granules locked in it as reinforcing stiffening bodies. |
