POLYVINYL ALCOHOL FILM WITH RETARDED WATER-SOLUBILITY, PROCESS FOR ITS PREPARATION AND ITS USE IN BURYING DEAD BODIES

摘要

1. Method for the production of a device for burying dead bodies, comprising a polyvinyl alcohol film with retarded aqueous dissolution, obtained from a saponified polyvinyl alcohol resin, characterized in that a film is utilized such as : - its thickness is comprised between 30 and 100 mu m ; - the basic polyvinyl alcohol resin contains a proportion by weight of residual unsaponified vinyl acetate which is comprised between 0,2 and 0,7% ; - said film comprises in its body a plasticizer and an anti-blocking agent ; and - before removal of water useful for aqueous dissolution, the composition by weight of said film is approximately as follows : - polyvinyl alcohol resin : from 45 to 60% - plasticizer : from 5 to 20% - anti-blocking agent : from 0,05 to 0,2% - water : amount sufficient for aqueous dissolution of the resin.