Solid rigid plastic PVC sheetis usually made by superposing and heating the rolled PVC sheet. Solid rigid plastic PVC sheet is divided into 3 heating stages, 1 adjustment stage, and 1 cooling stage.
1. Low temperature heating stage
2. Medium temperature heating stage
3. High temperature heating stage
4. Stop the heating adjustment stage
5. Cooling stage
PVC rigid board is usually made by superposing and heating the rolled PVC sheet. According to needs, this solid rigid plastic PVC sheet can be flexibly made into various thicknesses. As PVC is a thermally unstable resin, it will decompose to release HCl and form a polyene structure. If processed at high temperature for a long time, it will seriously affect the performance of the product. However, PVC is also a poor heat conductor and slow heat transfer. To prepare products with good performance, the heating time is difficult to control. If the heating time is not enough, the inside of the board is easy to layer; if the heating time is too long, it will not only reduce the production efficiency, What’s more serious is that PVC will decompose rapidly at high temperature for a long time, which will affect the performance of the product.
