PURPOSE: To provide the subject product having excellent algicidal, nonpoisonous, anticorrosive and strength properties, by compounding a specific amount of an antibacterial and antifungal compound with a thermoplastic synthetic resin.

CONSTITUTION: The objective product is produced by compounding 0.10W7.0pts. wt. of an antibacterial and antifungal compound (preferably sodium propionate or thiapentazole) with 100pts.wt. of a thermoplastic resin (preferably the monofilament, film, sheet or coating material of PE resin, PP resin, polyvinylidene resin, polyamide resin, polyester resin, vinyl chloride resin or EVA resin).