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A kind of glass fiber reinforced PET composition and preparation method thereof

A composition and glass fiber technology, applied in the field of polymer composite materials, can solve problems such as affecting the appearance and affecting the performance of compression-resistant parts

Active Publication Date: 2021-04-09
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the glass fiber reinforced PET product has greatly improved the strength of the product, there are floating fibers on the surface of the injection molded part, which not only affects the appearance, but also affects the performance of the pressed part

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dry the PET at a temperature of 110°C for 4 hours;

[0039] (2) Weigh 60 parts of dry PET, 25 parts of glass fiber, 5 parts of sodium benzoate, and 5 parts of surface modifier (ethylene bis fatty acid amide (TAF): silicone weight ratio is 1:1);

[0040] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3-min;

[0041] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0042] (5) The material is melt-extruded and granulated by a twin-screw extruder to obtain a glass fiber reinforced PET composition;

[0043] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 230°C, the temperature of the second zone is 245°C, the temperature of the third zone is 255°C, the temperature of the fourth zone is 265°C, the temperature of the fifth zone is 260°C, and the temperature of the sixth zone The temperature is...

Embodiment 2

[0045] (1) Dry PET at 110-140°C for 4-5 hours; PBT at 110-120°C for 4-5 hours;

[0046] (2) Weigh 40 parts of dry PET, 10 parts of PBT, 30 parts of glass fiber, 5 parts of toughening agent (maleic anhydride grafted ethylene-octene copolymer), 8 parts of sodium benzoate, 8 parts Parts of surface modifier (ethylene bis fatty acid amide (TAF): silicone weight ratio is 1:1);

[0047] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3-5 minutes;

[0048] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0049] (5) The material is melt-extruded and granulated by a twin-screw extruder to obtain a glass fiber reinforced PET composition;

[0050] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 220°C, the temperature of the second zone is 225°C, the temperature of the third zone is 235°C, the temperature of th...

Embodiment 3

[0052] (1) Dry PET at 110-140°C for 4-5 hours; PBT at 110-120°C for 4-5 hours;

[0053] (2) Weigh dry 40 parts of PET, 5 parts of PBT, 35 parts of glass fiber, 3 parts of toughening agent (ethylene-methyl acrylate copolymer and ethylene-methyl acrylate-glycidyl methacrylate ), 5 parts of sodium benzoate, 5 parts of surface improving agent (ethylene bis fatty acid amide (TAF): silicone weight ratio is 1:1);

[0054] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3-5 minutes;

[0055] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0056] (5) The material is melt-extruded and granulated by a twin-screw extruder to obtain a glass fiber reinforced PET composition;

[0057] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 240°C, the temperature of the second zone is 255°C, the temperature of the third ...

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Abstract

The invention provides a glass fiber reinforced PET composition and a preparation method thereof, which consists of 30-60 parts of PET, 0-10 parts of PBT, 25-45 parts of glass fiber, 0-5 parts of The nucleating agent and 5-10 parts of the surface improving agent are prepared by mixing, extruding and granulating. The invention enhances the compatibility between PET and glass fiber by mixing TAF and silicone in the surface improver; and forms similar anchoring nodes between glass fiber and basic resin, improving the adhesion between glass fiber and resin The knot state reduces the separation of glass fiber and resin, thereby greatly reducing the exposure of glass fiber. In addition, the present invention adopts chopped glass fibers with a rectangular cross section, which can not only reduce the floating fiber phenomenon itself, but also cooperate with the surface improver to jointly improve the floating fiber on the surface of the glass fiber reinforced PET composition after injection molding, and improve its compressive properties.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a glass fiber-reinforced PET composition with improved floating fibers and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET for short) is the earliest polyester material to be industrialized, but it was almost all used for synthetic fibers in the early stage; after the 1980s, after the successful development of nucleating agents and crystallization accelerators, PET began to Gradually began to be used as engineering plastics, and together with polybutylene terephthalate (PBT) as thermoplastic polyester, became one of the five major engineering plastics. PET has excellent physical and mechanical properties in a wide temperature range, and the long-term use temperature can reach 120°C; its electrical insulation is excellent, and its electrical properties are still good even at high temperature and high frequency; PET ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L83/04C08K7/14C08K5/098C08K5/20B29C48/92
Inventor 杨桂生吴安琪
Owner HEFEI GENIUS NEW MATERIALS
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