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Floating fiber free glass fiber reinforced PET (Polyethylene Terephthalate) composition and preparation method thereof

A technology without floating fiber and composition, applied in the field of polymer composite materials, can solve problems such as affecting the appearance and affecting the performance of compression-resistant parts, and achieve the effects of reducing the exposure of glass fibers, improving the bonding state, and increasing the thickness

Active Publication Date: 2017-06-09
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 mica, 5 parts of sodium benzoate, and 5 parts of silicone powder;

[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 melted and extruded by a twin-screw extruder, and granulated;

[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 zone The temperature is 265°C, the head temperature is 265°C, and the host speed is 15HZ. The performance test res...

Embodiment 2

[0044] (1) Dry PET at 140°C for 5 hours; PBT at 120°C for 5 hours;

[0045] (2) Weigh dry 40 parts of PET, 10 parts of PBT, 30 parts of glass fiber, 5 parts of mica, 5 parts of toughening agent (maleic anhydride grafted ethylene-octene copolymer and ethylene-acrylic acid methyl ester copolymer), 5 parts of sodium benzoate, 5 parts of silicone powder;

[0046] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 5 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 melted and extruded by a twin-screw extruder, and granulated;

[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 zone is 235°C, the temperature of the fourth zone is 245°C, the temperature of the fifth zone is 240°C,...

Embodiment 3

[0051] (1) Dry PET at 120°C for 5 hours; PBT at 120°C for 5 hours;

[0052] (2) Weigh 40 parts of dry PET, 5 parts of PBT, 35 parts of glass fiber, 10 parts of mica, 3 parts of toughening agent (ethylene-methyl acrylate-glycidyl methacrylate), 5 parts Parts of sodium benzoate, 5 parts of silicone powder;

[0053] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 5 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 melted and extruded by a twin-screw extruder, and granulated;

[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 zone is 275°C, the temperature of the fifth zone is 270°C, and the temperature of the sixth zone is 270°C...

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Abstract

The invention provides a floating fiber free glass fiber reinforced PET (Polyethylene Terephthalate) composition and a preparation method thereof. The floating fiber free glass fiber reinforced PET composition is prepared from 30-60 parts of PET, 0-10 parts of PBT (Polybutylece Terephthalate), 25-45 parts of glass fiber, 5-15 parts of mica, 0-5 parts of a toughening agent, 5-10 parts of a nucleating agent and 5-10 parts of silicon ketone powder through mixing, extruding and granulating. Due to addition of the mica and the silicon ketone powder, the compatibility of the PET and the glass fiber can be enhanced; and analogous anchoring nodes are formed between the glass fiber and the PET resin, so that the adhesion state of the glass fiber and the resin can be changed, and separation of the glass fiber from the resin can be reduced. Meanwhile, due to mutual cooperation of the mica and the silicon ketone powder, the dispersity of the glass fiber can be improved, the adhesion strength of the PET and a glass fiber interface can be increased, and the separation of the glass fiber from the resin can be reduced, so that exposure of the glass fiber can be greatly reduced, and the pressure resistance of the floating fiber free glass fiber reinforced PET composition can be improved.

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 without 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 also h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L83/04C08L23/08C08L51/06C08K7/14C08K3/34C08K5/098B29C47/92B29C48/92
Inventor 杨桂生吴安琪
Owner HEFEI GENIUS NEW MATERIALS
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