Glass fiber-reinforced PET composition without exposed glass fibers and preparation method thereof

A technology without floating fibers and compositions, 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 improving flow properties, increasing interface bonding strength, and improving surface floating fibers.

Inactive Publication Date: 2018-05-01
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although glass fiber reinforced PET products have 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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  • Glass fiber-reinforced PET composition without exposed glass fibers and preparation method thereof
  • Glass fiber-reinforced PET composition without exposed glass fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dry PET at 110°C for 4 hours; PTT at 110°C for 4 hours;

[0031] (2) Take by weighing 60 parts of dry PET, 5 parts of PTT, 25 parts of glass fiber, 5 parts of wollastonite, 5 parts of sodium benzoate, and 5 parts of silicone oil;

[0032] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3 minutes;

[0033] (4) Then the above-mentioned uniformly mixed material is added to the feeding port of the twin-screw extruder;

[0034] (5) The material is melted and extruded by a twin-screw extruder, and granulated;

[0035] 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...

Embodiment 2

[0037] (1) Dry PET at 140°C for 5 hours; PTT at 120°C for 5 hours;

[0038] (2) Weigh dry 40 parts of PET, 10 parts of PTT, 30 parts of glass fiber, 5 parts of wollastonite, 5 parts of toughening agent maleic anhydride grafted ethylene-octene copolymer, 5 parts sodium benzoate, 5 parts of silicone oil;

[0039] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 5 minutes;

[0040] (4) Then the above-mentioned uniformly mixed material is added to 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 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, and the temperature of the sixth zone The tempera...

Embodiment 3

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

[0045] (2) take by weighing dry 40 parts of PET, 5 parts of PTT, 35 parts of glass fiber, 10 parts of wollastonite, 3 parts of toughening agent ethylene-methyl acrylate copolymer, 5 parts of sodium benzoate, 5 parts of silicone oil;

[0046] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 5 minutes;

[0047] (4) Then the above-mentioned uniformly mixed material is added to 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 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. The...

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Abstract

The invention provides a glass fiber-reinforced PET composition without exposed glass fibers and a preparation method thereof. The glass fiber-reinforced PET composition is prepared from 30 to 60 parts of PET, 5 to 10 parts of PTT, 25 to 45 parts of glass fibers, 5 to 15 parts of wollastonite, 0 to 5 parts of a flexibilizer, 5 to 10 parts of a nucleating agent and 5 to 10 parts of silicone oil through mixing, extrusion and granulation. According to the invention, cooperation between the wollastonite and the silicone oil improves the phenomenon of surface emergence of glass fibers after injection molding of the PET composition and enhances the anti-compression performance of the glass fiber-reinforced PET composition.

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 realize industrialization, 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 (PTT) 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; PE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L83/04C08L51/06C08K7/14C08K3/34C08K5/098
CPCC08L67/02C08L2205/025C08L2205/035C08L83/04C08L51/06C08K7/14C08K3/34C08K5/098
Inventor 杨桂生吴安琪范继贤
Owner HEFEI GENIUS NEW MATERIALS
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