| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition for a partly or wholly cylindrical molding excellent in dimensional stability and surface appearance as well as mechanical properties and heat resistance by selecting a composition prepared by mixing a polyethylene terephthalate resin with glass fibers, an inorganic layered compound and a polyfunctional compound in a specified ratio so that the mean particle diameter of the inorganic layered compound in the composition may fall within a specified range. SOLUTION: This composition is one which comprises 100 pts.wt. polyethylene terephthalate resin, 20-100 pts.wt. glass fibers, 1-10 pts.wt. inorganic layered compound and 0.1-5 pts.wt. polyfunctional compound and in which the mean particle diameter of the inorganic layered compound falls within the range of 0.05-3μm. The inorganic layered compound is desirably one having hydroxyl groups on the end portions of the layers or one having ion exchange capacity. The polyfunctional compound is exemplified by an epoxysilane, a compound having at least two functional groups such as epoxy groups or isocyanato groups or a carboxylic acid anhydride. This composition can exhibit its effect especially when it is processed by injection molding.
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