THERMALLY EXPANDED GRAPHITE COMPOSITE FORMED BODY, ITS PRODUCTION AND OIL ABSORBENT MATERIAL

摘要

PROBLEM TO BE SOLVED: To produce a lightweight, easily handleable porous composite formed body by depositing thermally expanded graphite on the inside of an interlocked matrix in which staples are fused to each other at their intersection points. ;SOLUTION: In this production, a mixture of thermally expanded graphite and thermoplastic resin based staples is charged into a mold and then, subjected to press forming while heating them to a temp. equal to or higher than the temp. at which the staples are fused to each other. Accordingly, the thermally expanded graphite is deposited on the inside of an interlocked matrix in which the staples are fused to each other at their intersection points, to produce the objective composite formed body. This composite formed body is lightweight and easily handleable and also has excellent absorbency and therefore, is useful as an oil absorbent material. As the thermally expansible graphite for forming the thermally expanded graphite, e.g. a graphite material obtained by subjecting natural scaly graphite that occurs in Canada and has 36 to 80mesh grain size, a 90wt.% fixed carbon content and a 8wt.% ash content, to acid treatment, thereafter, washing this treated graphite with water and then, drying the washed graphite, is used. The obtained thermally expansible graphite is heated to 1,000°C to form thermally expanded graphite having a 0.004g/cc bulk density. The resulting thermally expanded graphite is mixed with PE(polyethylene) staples to obtain a mixture used as the above mixture.;COPYRIGHT: (C)1998,JPO