| 摘要 |
<p>PURPOSE:To obtain the subject product suitable for a sleeve for transporting a developing solution, having excellent charge retention, improved adhesivity to a metal, etc., free from occurrence of crack, by making a film comprising a specific polymer and a styrenic resin into an electret. CONSTITUTION:A film obtained by blending (A) a poly(2,6-dialkyl-1,4-phenylene oxide) comprising a repeating unit of the formula (R is a <=4C alkyl) (preferably one wherein R is methyl) with (B) a styrenic resin (a copolymer of 99-70mol% styrene and 1-30mol% of a diene-based monomer) is made into an electret to give the objective product. The weight ratio of the component A to the component B is preferably 8:2 to 7:3. The film is generally obtained by dissolving the components A and B in an aromatic solvent, etc., to give a coating solution, coating a base with the coating solution, drying and making the coated base into an electret. Formation of an electret is preferably carried out by coronal electrical charging method.</p> |
