(the clear plastic sheet that is used for holding and protecting the art cover, not the shrink wrap)
I think it's a form of polyethylene.
Cellophane...and lots of swear words when you can't un-wrap it. ;)
ah.. in specific circumstances i might use a classic dvd case what got here approximately to the genuine case? im assuming you havr copied action picture in the adventure that your speaking appropriate to the enormous e book which you turn with the plastic sheets definite! i might reccomend that