| 摘要 |
PROBLEM TO BE SOLVED: To obtain an antistatic film composed of a polyvinyl alcohol resin containing electroconductive powder, having a low surface resistance, excellent in the durability of antistaticity and little in the danger of dropping of the electroconductive powder because of the excellent adhesivity of the powder to the resin. SOLUTION: This antistatic film is composed of a polyvinyl alcohol resin (PVA resin) containing electroconductive powder (preferably, metal oxide powder such as antimony-containing tin oxide). The electroconductive powder preferably has particle diameters of 0.01-0.5μm in the case of spheres, and long axes of 2-30μm and short axes of 0.1-3μm in the case of needles. A compounding amount of the electroconductive powder is preferably 70-150 pts.wt. based on 100 pts.wt. of the PVA resin, e.g. in the case where the electroconductive powder consists of spheres and transparency is requires in the film. The PVA resin may be obtained by saponifying a polymer of vinyl acetate. Preferably, the degree of polymerization of the PVA resin is 1000-30000, the degree of saponification is >=98mol%. Further, the thickness of the objective product is preferably 10-100μm.
|
