HIGH-PRECISION MECHANICAL PARTS MADE FROM FLAME-RETARDANT RESIN FOR OFFICE AUTOMATION EQUIPMENT
申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0754531A1
公开(公告)日:1997-01-22
Disclosed is a flame retardant, high precision resin mechanical part for use in office automation machines required to function with high accuracy and high precision, which is made by injection molding a thermoplastic resin composition comprising: (A) an amorphous thermoplastic resin; (B) an inorganic filler in a scale form; and (C) a specific phosphoric acid ester in which phosphoric acid ester groups are bonded through a bisphenol. The high precision resin mechanical part of the present invention is free from conventionally experienced disadvantages, such as volatilization of a flame retardant contained in the resin, smoking caused by the volatilization of the flame retardant and occurrence of MD (mold deposit) during the production thereof by molding, and bleeding of the flame retardant during the use thereof. Further, the mechanical part of the present invention is unlikely to suffer from warpage, and has advantageously small shrinkage ratio during the production thereof by molding. The mechanical part of the present invention has also not only high precision but also various excellent mechanical properties, such as extremely low anisotropy in linear expansion coefficient, and excellent vibration characteristics. The high precision resin mechanical part of the present invention can be advantageously used as a mechanical part for high precision machines which are required to function with high accuracy and high precision even under various stringent conditions, such as computers, game machines, sound-reproducing systems, audio-visual machines, copiers, printers, facsimile machines, personal computers, word processors, portable communication apparatuses and composite machines composed thereof.
本发明公开了一种阻燃高精度树脂机械零件,用于要求高精度和高准确度的办公自动化机器,该零件是通过注塑成型热塑性树脂组合物制成的,该组合物包括:(A) 无定形热塑性树脂;(B) 鳞片状无机填料;以及 (C) 特定磷酸酯,其中磷酸酯基通过双酚键合。本发明的高精密树脂机械零件不存在传统的缺点,例如树脂中含有的阻燃剂挥发、阻燃剂挥发导致的冒烟和通过模塑生产过程中出现的 MD(模具沉积物),以及使用过程中阻燃剂的渗出。此外,本发明的机械部件不易发生翘曲,而且在模塑生产过程中具有收缩率小的优势。本发明的机械部件不仅精度高,而且还具有各种优异的机械性能,例如极低的线膨胀系数各向异性和优异的振动特性。本发明的高精度树脂机械零件可作为高精度机器的机械零件使用,这些机器即使在各种苛刻的条件下也要求高精度和高准确度,例如计算机、游戏机、音响系统、视听机器、复印机、打印机、传真机、个人计算机、文字处理机、便携式通信设备以及由它们组成的复合机器。