preparation of film from the powders and the subsequent release of the biocide from the film the examples further illustrate the use of polyethylene waxes to lower moisture vapor transmission and slow the release rate of the biocide from both powders and films however the examples are not intended to be limiting as other clo 2 sources other thermoplastic polymers other polyolefin polymers other waxes and other materials suitable to control the rates of moisture vapor transmission and the release rate of the biocides can be employed the methods are exemplary only and other methods for preparing the biocide compositions of the invention can be determined by those skilled in the art without departing from the scope of the invention herein disclosed and claimed to 100 grams of polycaprolactone tone p767 were added amounts of a commercial clo 2 source perlox u2122 to result in perlox u2122 concentrations of 10 20 30 and 40 by weight the ingredients were both in the form of a fine powder the ingredients were mixed manually and heated in a forced air oven to 60 u00b0 c the mixture was then transferred to an industrial waring high intensity mixer and mixed at low speed for one minute and at high speed for two.