What is the maximum open time of a PVA glue?
The film of adhesive should be liquid at the time pressure is applied. This should be easily visible by a small, but continuous bead of adhesive along the edge of the glue line. In-plant conditions such as temperature, humidity, moisture content and air movement will have a big effect on the open time. In many cases, simply applying a heavier film of adhesive will be sufficient. The speed of set of a given adhesive will also have an effect on the open time. In general, the lower the speed of set value (see data sheet), the longer the open time.
