the invention relates to a composition for use in the production of an article of manufacture , and in particular , to the manufacture of wall and corner guards . the composition includes a biopolymer in combination with petg as well as a modifier . the biopolymer and modifier are preferably produced from an annually renewable source such as corn or sugar as opposed to traditionally used petroleum based plastics . in this manner , the composition of the invention is relatively environmentally friendly as compared to known compositions while maintaining many of the desirable qualities thereof . in addition , the production of the articles of manufacture results in the consumption of fewer fossil fuels and less production of pollutants .