Glass fiber-reinforced PBT/PET (Polybutylece Terephthalate/Polyethyleneglycol Terephthalate) composite material and preparation method thereof

A glass fiber and composite material technology, which is applied in the field of glass fiber reinforced PBT/PET composite material and its preparation, can solve the problems of dilemma in polyester market sales and large warpage deformation, and achieve the effect of reducing warpage rate and improving performance.

Inactive Publication Date: 2012-08-01
深圳市欧力隆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in recent years, due to the increased demand for large thin-walled parts, the warpage prevention of PBT has become an important issue
However, general grades of glass fiber reinforced PBT have large warpage and deformation, and the warpage problem once made the market sales of polyester in a dilemma. Therefore, various manufacturers attach great importance to the research and development of polyester products with low warpage grades.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] The preparation method of glass fiber reinforced PBT / PET composite material comprises the steps:

[0060] 1) Add PBT, PET, low-shrinkage polymer fillers, and tougheners to a high-speed mixer, drop in process dispersion oil, and mix for 5-10 minutes;

[0061] 2) Add the additive into the high-speed mixer, and mix with the mixture obtained in step 1) in the high-speed mixer for 5-10 minutes to obtain the blended material;

[0062] 3) Put the blended material into the twin-screw extruder, mix well, and melt extrude at the temperature of 180°C-290°C, the aspect ratio of the twin-screw is 36-56, and the speed of the main engine is 100-600rpm; at the same time, it is fed on the side The feed port is filled with glass fiber;

[0063] 4) Cut into pellets and sieve after cooling.

Embodiment 1

[0064] The specific preparation steps of the glass fiber reinforced PBT / PET composite material of embodiment 1 are as follows:

[0065]1) PBT 30kg, PET 19.5kg, low shrinkage polymer filler acrylonitrile-styrene-acrylic rubber copolymer ASA (LG LI-912) 10kg, toughener glycidyl methacrylate grafted POE (grafted (0.9%) (Bondyram 7103) 5kg, compatibilizer maleic anhydride grafted ABS (grafting rate 1.5%) (TRD-150) 5kg into the high-speed mixer, drop into the dispersing oil, mix for 5-10 minutes;

[0066] 2) Add 10980.2 kg of hindered amine antioxidant and 0.3 kg of lubricant montan ester wax into a high-speed blender, and mix with the mixture obtained in step 1) in a high-speed blender for 5-10 minutes to obtain a blended material;

[0067] 3) Put the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt extrude at a temperature of 180°C-230°C, a twin-screw length-to-diameter ratio of 44, and a host speed of 250rpm; Add alkali-free chopped glass fiber...

Embodiment 2

[0070] The specific preparation steps of embodiment 2 glass fiber reinforced PBT / PET composite material are as follows:

[0071] 1) PBT 26kg, PET 15.5kg, low shrinkage polymer filler ABS (121H) 20kg, toughening agent maleic anhydride grafted EPDM (grafting rate 1.5%) (TRD-358EP) 10kg, compatibilizer methyl Glycidyl acrylate graft grafted ABS (grafting rate 10%) (TRD-1100) 8kg was added to the high-speed mixer, after the dispersion oil was dropped, mixed for 5-10 minutes;

[0072] 2) Add 10760.2kg of hindered phenolic antioxidant and 0.3kg of lubricant ethylene bisstearic acid amide into a high-speed blender, and mix with the mixture obtained in step 1) in a high-speed blender for 5-10 minutes to obtain a blend materials;

[0073] 3) Put the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt extrude at a temperature of 180°C-230°C, a twin-screw length-to-diameter ratio of 44, and a host speed of 250rpm; Add alkali-free chopped glass fiber to th...

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Abstract

The invention discloses a glass fiber-reinforced PBT / PET (Polybutylece Terephthalate / Polyethyleneglycol Terephthalate) composite material and a preparation method thereof. The glass fiber-reinforced PBT / PET composite material consists of the following components in percentage by weight: 10-93.3 percent of PBT, 0.5-20 percent of PET, 0.5-20 percent of low shrink high molecular filler, 0.5-8 percent of compatilizer, 5-60 percent of glass fiber, 0-10 percent of toughening agent and 0.2-5 percent of aids, wherein the low shrink high molecular filler is one or more of an acrylonitrile-styrene-butadiene copolymer, an acrylonitrile-styrene-acrylic rubber copolymer and polycarbonate. The warping rate of glass fiber-reinforced PBT / PET composite material can be lowered effectively, and the performance of the material is improved; and the glass fiber-reinforced PBT / PET composite material can be widely applied to products such as automobile parts, electronic apparatuses and the like, and meets the requirements of large-sized thin-wall parts.

Description

[technical field] [0001] The invention relates to the field of polymer materials, in particular to a glass fiber reinforced PBT / PET composite material and a preparation method thereof. [Background technique] [0002] Parts made of polybutylene terephthalate (PBT) composite materials can obtain excellent heat resistance, flame retardancy, electrical insulation and molding processability, so they are used in electronic appliances, automobiles, mechanical equipment and precision The instrument industry has been widely used. [0003] The performance of unmodified PBT is not good, and PBT needs to be modified for practical application. Among them, glass fiber reinforced modified grades account for more than 70% of PBT. When PBT is not reinforced, its tensile strength and heat distortion temperature are the lowest among the five major engineering plastics, but after 30% glass fiber reinforcement, it jumps to the first place, that is, the tensile strength is increased by 1.4 times...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L55/02C08L51/00C08L69/00C08L51/06C08K13/04C08K7/14B29C47/92B29C48/92
Inventor 徐东徐永任昌义
Owner 深圳市欧力隆科技有限公司
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