Researchers from Pennsylvania State University have developed an innovative way to make paper bags that are wet-proof and durable. Paper bags have always been considered a suitable alternative to plastic bags due to their environmentally friendly properties.
The problem of paper bags lies in their relatively short life cycle, their intolerance to moisture or wetness, in addition to their rapid wear and loss of all their properties. Researchers used thermal renewal technology, where the cellulose in the paper is slowly heated in a low-oxygen place, in order to increase the tensile strength when wet.