| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laminate and a uniaxially oriented laminate containing an additive and not generating the trouble caused by the precipitation of the additive at the time of post-processing. SOLUTION: A laminate is obtained by laminating a coating layer 3 composed of a resin B preventing the precipitation of an additive from an inner layer composed of a additive-containing orienting resin to both surfaces of the inner layer 2 and this laminate is uniaxially stretched to obtain a uniaxially oriented laminate. As the orienting resin, generally, it is preferable to use a crystalline thermoplastic resin. Concretely, anα-olefin homopolymer such as low, medium and high density polyethylene with density of 0.91-0.97g/cm<3> , polypropylene and poly-4-methylpentene-1 is designated. Since the resin for preventing the precipitation of the additive achieves function as an adhesive layer, it is pref. that this resin has an m.p. lower than that of the resin forming the orienting resin at least by 5 deg.C or higher, especially, by 10-50 deg.C or higher. For example, low density polyolefin, an ethylene-α-olefin copolymer with density of 0.86-0.94g/cm<3> and an ethylene/vinyl acetate copolymer are designated.</p> |
