Related to my previous blog post, I found this YouTube video that goes a little more into how Trex utilizes plastic bags that you get from grocery stores. I was actually surprise myself to see that some other polyethylene material that can be collected for re-purposing are bread loaf bags, fruit/vegetable bags, dry-cleaning bags, and newspaper bags. Other thin plastic material that is collected are originally used to wrap cartons of water bottles and wrap shipping pallets. Just take a look at the video further below (don’t mind the echo of the narrator).
To find out which stores in your area accept all of these clean plastic bags, just take a look at http://www.plasticfilmrecycling.org/