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A kind of modified glass fiber reinforced pet composition and preparation method thereof

A technology of composition and glass fiber, which is applied in the field of modified glass fiber-reinforced PET composition and its preparation, can solve the problems affecting the appearance and the performance of pressed parts, so as to improve the bonding state, increase the bonding strength, The effect of improving dispersion

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

[0037] (1) Dry the PET at a temperature of 110°C for 4 hours;

[0038] (2) Weigh 60 parts of dry PET, 25 parts of glass fiber, 5 parts of hollow glass microspheres, 5 parts of sodium benzoate, and 10 parts of surface modifier (TAF:silicone weight ratio is 1:1) ;

[0039] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3 minutes;

[0040] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0041] (5) The material is melt-extruded and granulated by a twin-screw extruder to obtain a modified glass fiber reinforced PET composition;

[0042] 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 zon...

Embodiment 2

[0044] (1) Dry PET at 110°C for 4 hours; PBT at 110°C for 4 hours;

[0045] (2) Weigh 40 parts of dry PET, 10 parts of PBT, 30 parts of glass fiber, 5 parts of hollow glass microspheres, 5 parts of toughening agent (maleic anhydride grafted ethylene-octene copolymer and ethylene-methyl acrylate copolymer), 10 parts of sodium benzoate, 8 parts of surface modifier (TAF:silicone weight ratio is 1:1);

[0046] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3 minutes;

[0047] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0048] (5) The material is melt-extruded and granulated by a twin-screw extruder to obtain a modified glass fiber reinforced PET composition;

[0049] 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 zo...

Embodiment 3

[0051] (1) Dry PET at 110°C for 4 hours; PBT at 110°C for 4 hours;

[0052] (2) Weigh 40 parts of dry PET, 5 parts of PBT, 35 parts of glass fiber, 10 parts of hollow glass microspheres, 3 parts of toughening agent (ethylene-methyl acrylate-glycidyl methacrylate ), 5 parts of sodium benzoate, 5 parts of surface modifier (TAF: silicone weight ratio is 1:1);

[0053] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3 minutes;

[0054] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0055] (5) The material is melt-extruded and granulated by a twin-screw extruder to obtain a modified glass fiber reinforced PET composition;

[0056] 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 zone is 265°C, the temperature of the fourth...

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Abstract

The invention provides a modified glass fiber reinforced PET composition and a preparation method thereof, comprising 30-60 parts of PET, 0-10 parts of PBT, 25-45 parts of glass fiber, 5-15 parts of hollow glass microspheres, 0-15 parts 5 parts of toughening agent, 5-10 parts of nucleating agent and 5-10 parts of surface improving agent are prepared by mixing, extruding and granulating. The present invention enhances the compatibility between PET and glass fiber owing to adding hollow glass microsphere and surface improver; The bonding state of glass fiber and resin reduces the separation of glass fiber and resin, thereby greatly reducing the exposure of glass fiber.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a modified glass fiber reinforced PET composition 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 also has excellent cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L83/04C08L23/08C08K13/04C08K7/14C08K7/28C08K5/098C08K5/20B29C48/92
Inventor 杨桂生吴安琪
Owner HEFEI GENIUS NEW MATERIALS