Low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material and preparation method

A composite material and low warpage technology, which is applied in the field of low floating fiber, low warpage and high toughness flame retardant PET/PETG composite materials, can solve the problems of poor surface effect, cold crystallization, slow nucleation speed, etc., and achieve surface performance and Improved impact properties, lower crystallization temperature and crystallization rate, improved orientation and processing effects

Inactive Publication Date: 2014-12-24
古道尔工程塑胶(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyethylene terephthalate (PET) is a thermoplastic polymer. PET can maintain excellent physical and mechanical properties in a wide temperature range. It has excellent fatigue resistance, friction resistance and aging resistance. Outstanding electrical insulation, stable performance in most organic solvents and inorganic acids; but in flame-retardant PET, its impact strength is low, the nucleation speed is slow, and the crystallization temperature is high (220 ° C), which is prone to cold crystallization and processed products. Problems with dimensional instability and poor surface finish
PETG is a transparent, non-crystalline copolyester. PETG is composed of terephthalic acid (PTA), ethylene glycol (EG) and 1,4-cyclohexanedimethanol (CHDM). The product of exchange polycondensation, PETG has outstanding toughness and high impact strength, its impact strength is 3 to 10 times that of modified polyacrylates, and has a wide processing range, high mechanical strength and excellent flexibility , but its heat distortion temperature is too low, only 75°C, which will bring a lot of changes, such as drying is more troublesome and difficult to dry, and the surface hardness is also poor, and the product is easy to leave fingerprints after touching it. Said, cost performance is not high

Method used

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  • Low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material and preparation method
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  • Low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 30 parts of PET resin, 5 parts of PETG resin, 0.1 part of coupling agent, 2 parts of toughening agent, 11 parts of flame retardant, 0.5 part of nucleating agent, 0.1 part of antioxidant, 0.1 part of lubricant, and then mix the mixture in The screw speed of the twin-screw extruder is 300r / min, and the extrusion temperature is 200-270°C. During the extrusion process, 15 parts of special-shaped glass fibers are added to extrude and granulate to obtain a composite material.

[0020] The intrinsic viscosity of PET resin is 0.7; the intrinsic viscosity of PETG resin is 0.8; the coupling agent is γ-aminopropyltriethoxysilane; the toughening agent is ethylene-methyl acrylate-glycidyl methacrylate terpolymer The flame retardant is a mixture of brominated epoxy resin and sodium antimonate in a ratio of 1:3; the nucleating agent is a mixture of sodium carboxylate and talc in a ratio of 1:1; the antioxidant is β(3 , 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate an...

Embodiment 2

[0022] Mix 40 parts of PET resin, 15 parts of PETG resin, 0.5 parts of coupling agent, 5 parts of toughening agent, 13 parts of flame retardant, 0.5 part of nucleating agent, 0.5 part of antioxidant, 0.5 part of lubricant, and then mix the mixture in The screw speed of the twin-screw extruder is 300r / min, and the extrusion temperature is 200-270°C. During the extrusion process, 20 parts of special-shaped glass fibers are added to extrude and granulate to obtain a composite material.

[0023] The intrinsic viscosity of PET resin is 0.8; the intrinsic viscosity of PETG resin is 0.9; the coupling agent is γ-aminopropyltriethoxysilane; the toughening agent is ethylene-methyl acrylate-glycidyl methacrylate terpolymer The flame retardant is a mixture of brominated epoxy resin and sodium antimonate in a ratio of 1:4; the nucleating agent is a mixture of sodium carboxylate and talcum powder in a ratio of 1:2; the antioxidant is β(3 , 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol pr...

Embodiment 3

[0025] Mix 50 parts of PET resin, 20 parts of PETG resin, 1 part of coupling agent, 8 parts of toughening agent, 15 parts of flame retardant, 1 part of nucleating agent, 1 part of antioxidant, 1 part of lubricant, and then mix the mixture in The screw speed of the twin-screw extruder is 300r / min, and the extrusion temperature is 200-270°C. During the extrusion process, 30 parts of special-shaped glass fibers are added to extrude and granulate to obtain a composite material.

[0026] The intrinsic viscosity of PET resin is 0.8; the intrinsic viscosity of PETG resin is 1.0; the coupling agent is γ-aminopropyltriethoxysilane; the toughening agent is ethylene-methyl acrylate-glycidyl methacrylate terpolymer The flame retardant is a mixture of brominated epoxy resin and sodium antimonate in a ratio of 1:5; the nucleating agent is a mixture of sodium carboxylate and talcum powder in a ratio of 1:4; the antioxidant is β(3 , 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate ...

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Abstract

The invention discloses a low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material and a preparation method, and relates to the field of high polymer materials. The composite material is prepared by mixing 30-50 parts of PET resin, 5-20 parts of PETG resin, 0.1-1 part of a coupling agent, 2-8 parts of a flexibilizer, 11-15 parts of a fire retardant, 0-1 part of a nucleating agent, 0.1-1 part of an antioxidant and 0.1-1 part of a lubricating agent, adding 15-30 parts of irregular-shaped glass fibers during the extrusion process of a twin-screw extruder, extruding, and pelletizing to obtain. The preparation method of the low-fiber-emergence low-warping high-tenacity flame-retardant PET/PETG composite material disclosed by the invention utilizes the characteristic that the PETG resin is well compatible with the PET resin; the addition of the flame-retardant system PETG, the flexibilizer and the nucleating agent greatly improves the processing performance, the surface performance and the impact performance of the composite material, while influencing the other performances a little; meanwhile, the addition of the PETG and the irregular-shaped glass fibers reduces the crystallization temperature and the crystallization rate of the material, and lowers the warping degree.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method of blending and granulating PET, PETG, flame retardants, toughening agents, special-shaped glass fibers and related processing aids according to a certain ratio to make low-floating fibers and low warpage High toughness flame retardant PET / PETG composite material. Background technique [0002] Polyethylene terephthalate (PET) is a thermoplastic polymer. PET can maintain excellent physical and mechanical properties in a wide temperature range. It has excellent fatigue resistance, friction resistance and aging resistance. Outstanding electrical insulation, stable performance in most organic solvents and inorganic acids; but in flame-retardant PET, its impact strength is low, the nucleation speed is slow, and the crystallization temperature is high (220 ° C), which is prone to cold crystallization and processed products. Problems of dimensional instability and poor surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08L63/00C08K13/04C08K7/14C08K3/24C08K5/098C08K3/34B29B9/06B29C47/92B29C48/92
Inventor 刘辉黄勇
Owner 古道尔工程塑胶(深圳)有限公司
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