| 摘要 |
PURPOSE:The titled composition that contains a specific wollastonite, thus showing both good appearance and high plate adhesion, and having high heat resistance, mechanical strength and toughness. CONSTITUTION:Wollastonite, which has average particle size of 0.5-4.0, preferably 0.5-2.6 microns (as the 50% middle value according to the sedimentation balance method) less than 4wt%, preferably less than 3wt%, weight loss on roasting at 1,000 deg.C, is added to polyamide in an amount of 15-60wt%, preferably 30-50wt% and the resultant polyamide is formed and plated in a known manner. The product of formed polyamide is more stabilized by selecting the content x in wt%, average particle size Z in microns and the relative viscosity of polyamide y so that they satisfy equations I and II. When the relative viscosity of the polyamide is out of the above range, the plate adhesion largely fluctuates by a small variation in forming conditions.
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