I have recently stumbled across these websites that you may also be interested in. These people are taking plastic recycling to a new level and making some really beautiful products through Plastic Fusion.
The process called plastic fusion and it is relatively easy and is achieved by way of heating and fusing layers of plastic together (and sometimes trapping other material between the layers to create different textures). To do this you can use an iron (clothes iron, and there is a tutorial I’ve seen using a hair straighter), you will need wax paper and a well ventilated area. The fumes are toxic and you need to take extra care not to inhale them. There is a DIY plastic fusion & mixed media tutorial on YouTube that is worth checking out.