FILMY FILTERING MATTER FREE FROM STICKING OF LIVING ORGANISM

摘要

PURPOSE:To prevent sticking of an aquatic animal and to prevent a filtering film from deterioration, by interposing a vinyl chloride in a filmy state, etc. to an air and water permeable filmy matter used for a underwater civil work, etc. CONSTITUTION:A filmy matter of porous vinyl chloride is stuck to, or a sprous sheet of vinyl chloride is fixed to a porous filmy or netlike matter 3 made of synthetic fibers such as polyester used for a sea-contaminants preventing film and a fish preserve for raising. Further, a vinyl chloride is coated onto a yarn- shaped matter made of polyester, etc. to be woven. Thus the filmy matter, formed like this, is free from sticking of aquatic animals and algae, etc., and the filtering performance is maintained over a long period of time.