| 摘要 |
PROBLEM TO BE SOLVED: To provide a natural down fiber heat insulating material which has an excellent heat-insulating performance than those of conventional heat- insulating materials, scarcely exhausts injurious substance, when scrapped and burnt, and is mostly biodegraded, when reclaimed. SOLUTION: Natural down is defatted and washed (1) with an alcohol, dried and then processed (2) into fiber-like products. 1 to 99 wt.% (preferably 50 to 90 wt.%) of the down fibers as a component raw material are homogeneously blended (3) with 1 to 99 wt.% of PP/PET sheath-core conjugate fibers as a binder. The blend is laminated (4) to give a prescribed density and then heated and molded (5) with a hot air drier to produce the natural feather fiber heat insulating material. The interlacement of the down fibers with the core fibers of the sheath-core conjugate fibers remarkably enhances the whole porosity of the heat-insulating material. Since the feather fibers are a natural organic material, the feather fibers do not exhaust an injurious substance, when burnt, and are also biodegraded, when claimed in soil. |
