| 摘要 |
<p>PURPOSE:To enable fabrication of high fluid phenolic resin moldings of for low cost high precise optical parts, ultra high precise carbon basement of a magnetic disk, etc., to be finished by a method wherein light transmittance, a number of pores, and a metal content of the phenol resin high fluid molding material are respectively set. CONSTITUTION:For a high fluid phenolic resin molding, light transmittance per 1mm optical path of visible radiation of 800mm wavelength is set to 80% or over, a number of pores of at least 100mum pore diameter per 1cm is set to under one pore, and a metal content is respectively set to at most 200wt.ppm. Then, in manufacturing, a surface of granular phenol resin wherein its water content is at most 1wt.%, its grain size is at least 50mum, and heat fluidity measured by a disk cure method is 60-160mm, is coated with a low surface tension substance of 30-160 deg.C melting point by 0.2-5wt.% in a composition ratio to phenol resin. Thereafter, the phenol resin molding material is transfer molded, injection molded, or extrusion molded.</p> |
