| 摘要 |
<p>1499166 Processing polymer-containing scrap materials NYLEX CORP Ltd 13 Aug 1975 [14 Aug 1974] 33771/75 Heading C3P [Also in Division D1] A method for facilitating the processing of a polymer-containing scrap material having a composite structure consisting of one or more polymer components and a fibre or fabric component comprises subjecting the scrap material to a dosage of high energy radiation (e.g. radiation from a Co<SP>60</SP> source or from an electron accelerator) sufficient to selectively degrade at least one of the components of the material but which leaves one or more other components substantially unchanged, whereby the treated material can be subsequently reused. In a modification of the method, the composite material treated is a co-extruded or multilayered material consisting of two or more polymeric components, at least one of which is degraded by the radiation and at least one being left undegraded. In examples the treatment is applied to PVC-coated cotton fabric; the irradiated material is subsequently processed, together with other components, to form garden hoses and shoe soles.</p> |
