TRACKING-RESISTANT PHENOL RESIN COMPOSITION AND SAFETY APPARATUS PART PREPARED BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a phenol resin compsn. which has such an excellent tracking resistance as a CTI value of 175 V or higher. SOLUTION: A phenol aralkyl resin in an amount of 30-70 vol.% and 70-30 vol.% ceramic filler having an average particle size of 40μm or lower are mixed and molded. 30-40 vol.% phenol novolak resin and 70-60 vol.% silica filler having an average particle size of 40μm or lower are mixed and molded. A safety apparatus part is prepd. by arranging various elements or electric parts in a case formed from a tracking-resistant phenol resin compsn.