| 摘要 |
<p>Covered rolls (10) having reduced residual stresses through the inclusion of one or more intermediate compressive layers (12) and methods for manufacturing are disclosed. In one embodiment, the intermediate compressive layer (12) comprises a three-dimensional fabric that is filled preferably with a thermoset resin system which cures at lower temperature than the cover. In a second embodiment, the precise amount of shrinkage in the roll (10) is predetermined to a high enough degree of accuracy so that a depth for the fabric layer can be used to compensate for the amount of shrinkage, thereby eliminating the need for filling. In a third embodiment, the compressive layer (12) is comprised of a meltable material wherein said material melts at cure temperatures. The resulting cavity is then filled with a thermoset resin. The problems caused by chemical and thermal shrinkage are further reduced through a method based on applying a polymeric cover layer (11) over one or more intermediate compressive layers (12), curing at an elevated temperature, and, allowing the cover (11) to shrink during curing or hardening.</p> |
