| 摘要 |
PURPOSE:To provide a molding material excellent in moisture resistance, appearance and the packability in its injection molding, comprising each specific phenolic resin, laminate powder and plywood abrasive powder at specified proportion. CONSTITUTION:The molding material comprising (A) 100 pts.wt., on a phenolic resin basis, of an organic filler <=0.2mm in particle diameter prepared by simultaneous grinding phenolic resin and hexamethylenetetramine, (B) 10-60 pts.wt. of laminate powder <=0.2mm in particle diameter prepared by grinding laminates based on plant fibers such as kraft paper, cotton paper or linter paper with a resin content of 30-70wt.%, and (C) 10-60 pts.wt. of powder <=0.2mm in particle diameter prepared by sieving plywood abrasive powder. |
