| 摘要 |
<p>PURPOSE:To prevent thread-like rusty, etc., from generating at an edge part of aluminum foil by coating this edge part thick by applying a thermosetting acryl resin paint over a paint containing specified fine powder. CONSTITUTION:A paint A, composed of a thermosetting or thermoplastic resin, whose percentage of elongation is 30 % (20 deg.C) or more and whose glass transi tion point is -25-60 deg.C, and 5-35 pts.wt. transparent silica and/or alumina powder of 5-50nm grain size to 100 pts.wt. that resin, is applied to edge part of an aluminum foil thick and in a pudding shape. Next, a thermosetting acryl resin paint B, whose percentage of elongation is 3-30% (20 deg.C), whose glass transition temperature is 60-130 deg.C and which forms a film, is applied over the paint A. It is thus possible to prevent thread-like rust from generating at the edge part of an aluminum foil and to form a colorless transparent film, resulting in improvements in flatness, weather resistance, adhesion and physical property without spoiling a metallic feeling characteristic of aluminum.</p> |
