Process and device for recycling blown plastics

Abstract From the Canadian patent

In a process for recycling blown plastics the plastic, is first ground, melted, and then is degassed and filtered. The degassed plastic is re-blown in the same plant before it has solidified, and, in order to make the degree of blowing uniform, the quantity of gas introduced into the plastic is controlled in relation to the quantity of plastic taken to the blowing plant per unit time, and the pressure of the plastic taken to the blowing plant is preferably kept as constant as possible. The device for implementing this process has an extruder to plasticize and degas the plastic the outlet of which is connected via at least one line to a mixer to which a gas supply device is also connected. …