| 摘要 |
<p>PROBLEM TO BE SOLVED: To give a molded body from a recycled resin showing excellent transparency by dissolving a molded body of a polymer resin having an alicyclic structure in a solvent and bleaching thereof by an adsorbent. SOLUTION: A polymer resin having an alicyclic structure is preferably a resin which has an alicyclic structure in a main chain. The most preferable alicyclic structure is a cycloalkane structure. A treatment with an adsorbent is conducted, for example, in such a way that after the absorbent is added to a resin solution and the solution is stirred for 0.1-10 hours at 100 deg.C, the adsorbent is removed. Another treatment with the adsorbent may be conducted by passing the resin solution through an adsorbent column or these treatments may be combined. The adsorbent may be used as a filtrating co-agent. The adsorbent preferably includes SiO2 or Al2 O3 such as synthetic zeolite, natural zeolite, active alumina, active white clay or the like or a crystalline or non- crystalline mixture thereof.</p> |
