| 摘要 |
<p>PURPOSE:To obtain a transparent and highly moisture-proof polymer alloy sheet for wrapping chemicals, having physical properties in a well-balanced manner and improved in appearance, transparency, moldability, moisture resistance, impact resistance and the like by blending a non-crystalline polyolefin and a styrene elastomer and by allowiing dispersed particles to have extremely small particle sizes. CONSTITUTION:The polymer alloy sheet in produced from a blend of a non- crystalline polyolefin and a styrene elastomer, in which the difference in refractive index at normal temperatures between the polyolefin and the elastomer is 0.03 or less. It is preferred that the non-crystalline polyolefin and the styrene elastomer be blended in a ratio of 99/1 to 80/20 in terms of weight percentage. Examples of the non-crystalline polyolefin include a copolymer of an adduct formed between cyclopentadiene or its derivative and norbornadiene or its derivative with at least one unsaturated monomer selected from among ethylene, butadiene and styrene derivatives, and a hydrogenated derivative of such a copolymer.</p> |
