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Lens barrel made from glass fiber reinforced flame retardant resin composition

A technology of resin composition and thermoplastic resin, applied in the field of lens barrel, can solve the problems of low anisotropy and non-disclosure

Inactive Publication Date: 2010-03-10
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this publication does not disclose the characteristics required for lens barrels in cameras, lens barrels in liquid crystal projectors, and lens barrels in projection televisions, that is, good mechanical strength, flame retardancy, fluidity, and satisfying Effective Insights into Low Anisotropy Polycarbonate Resin Compositions

Method used

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  • Lens barrel made from glass fiber reinforced flame retardant resin composition
  • Lens barrel made from glass fiber reinforced flame retardant resin composition
  • Lens barrel made from glass fiber reinforced flame retardant resin composition

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specific Embodiment approach

[0219] The inventors of the present invention think that the best aspects of the present invention include the preferred ranges of the above-mentioned requirements, for example, representative examples thereof are described in the following examples. Of course, the present invention is not limited to these schemes.

Embodiment 1～4、 comparative example 1～3

[0231] The polycarbonate resin and the various additives described in Table 1 were mixed in each compounding amount with a blender, and then melt-kneaded using a vented twin-screw extruder to obtain pellets. The various additives used are pre-mixed with polycarbonate resin based on the concentration of 10-100 times the compounding amount, and then mixed with a blender. The vent type twin-screw extruder is made by Nippon Steel Works: TEX-30XSST (full meshing, same direction rotation, 2 screws). The extrusion conditions are discharge rate 20kg / h, screw rotation speed 150rpm, and vacuum degree of vent 3kPa. In addition, the extrusion temperature is set to 270°C from the first supply port to the second supply port, and 270°C from the second supply port to the second supply port. The die part is 280°C. In addition, the reinforcing filler was supplied from the second supply port using the side feeder of the extruder, and the remaining polycarbonate resin and additives were supplied...

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Abstract

The invention provides a lens barrel made from glass fiber reinforced flame retardant resin composition, which is formed by injection molding the glass fiber reinforced flame retardant resin composition. The glass fiber reinforced resin composition contains 40-99 weight parts of aromatic polycarbonate resin (component A), 1-60 weight parts of reinforced filling material (component B), and 0.001-20weight parts of flame retardant (component C) with respect to 100 weight parts of the total weight of the component A and the component B. The reinforced filling material (component B) includes flatcross-section glass fiber (component B-1) with the long diameter of the cross-section of the fiber as 10-59 mu m, and ratio between the long diameter and the short diameter between 1.5-8, as well as round cross-section glass fiber (component B-2) with ratio between the average fiber length and the average fiber diameter lower than 10. The weight ratio between the component B-1 and the component B-2 of the reinforce filling material (component B) is from 5 / 95 to 95-5.

Description

technical field [0001] The present invention relates to a lens barrel made of a glass fiber reinforced aromatic polycarbonate resin composition with improved dimensional accuracy. More specifically, the present invention relates to a lens barrel reinforced with a flat cross-section glass fiber and a circular cross-section glass short fiber having a ratio of an average fiber length to an average fiber diameter (aspect ratio) of 10 or less, and the mechanical strength is , Excellent low anisotropy, and also has good flame retardancy, made of glass fiber reinforced resin composition. Background technique [0002] Thermoplastic resins reinforced with glass fibers are widely used because of their excellent mechanical strength and processability. In particular, polycarbonate resins are used in various applications such as mechanical parts, automobile parts, electrical and electronic parts, and office equipment parts due to their excellent properties such as mechanical strength, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L25/06C08L25/12C08L55/02C08K7/14C08K5/42C08K5/521G02B7/02
Inventor 池松龙介
Owner TEIJIN KASEK KK
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