| 摘要 |
<p>PURPOSE:To obtain a container which is high in gas permeability and softness to be suitable for perseveration of platelet for a long time by forming the container from a copolymer composition of a polybutene-1 based polymer and a specified thermoplastic elastomer or from a base material mainly composed thereof. CONSTITUTION:A container for preserving platelet as desired is formed by using a copolymer composition of a polybutene-1 based polymer (PB-1) and a thermoplastic elastomer of a polyolefin system, polystyrene system or 2- polybutadiene system or a base material mainly composed thereof. The PB-1 is so-called isotactic polybutene-1 and is allowed to utilize a copolymer composition of the polybutene-1 and an alpha-olefin such as ethylene, propylene or pentene as comonomer component in addition to homopolymer. The thermoplastic elastomer herein used is, for example, an ethylene-propylene copolymer, a block copolymer of polystyrene and an ethylene-butylene copolymer or the like.</p> |
