Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process of preparing engineering plastics with recovered polyethylene terephthalate

A technology of polyethylene terephthalate and engineering plastics, which is applied in the field of composite materials with engineering plastic properties, can solve the problems of cumbersome methods, insufficient rigidity and high cost, and achieves cost reduction, good heat resistance, and simple methods. Effect

Inactive Publication Date: 2009-01-07
SHANGHAI JIAOTONG UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because recycled polyethylene terephthalate resin (PET) has problems such as low intrinsic viscosity, poor flow stability, difficult demoulding, and poor impact of molded products, it generally cannot be directly injected and extruded, and it is difficult to produce materials, especially Difficult to prepare high-end products
People began to realize that PET recycling is of great significance, so people began to do some PET recycling work, such as Qian Jianhua and Liu Lizhen synthesized p-phenylene type unsaturated polyester resin (CN200410084327.8) with polyester waste, using chemical reaction method to utilize polyester waste, but the method is more loaded down with trivial details, and it is difficult to recycle on a large scale, and the required expenses and equipment are more complicated and the cost is high; Guo Weihong et al. Ethylene terephthalate, polycarbonate and styrene / ethylene / butadiene / styrene copolymer are used as raw materials to obtain materials with excellent toughness, and polyethylene terephthalate PET / Nylon PA / hydrogenated triblock styrene-butadiene-styrene copolymer has obtained engineering plastics with better performance, but the rigidity is insufficient, and it is lacking in application as engineering plastics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw material components are by weight: 30 parts of PET, 50 parts of PA66, 0.05 parts of PBO, 0.05 parts of isocyanate, 0.2 parts of antioxidant 1010, 0.4 parts of antioxidant 264, 1.3 parts of silicone oil, 3 parts of stearic acid Zinc, 15 phr short glass fibers.

[0020] First, mix PET, PA66, PBO, isocyanate, antioxidant 1010, antioxidant 264, silicone oil, and zinc stearate on a high-speed mixer. The speed of the high-speed mixer is 10,000 rpm. Put it into a twin-screw extruder together with long glass fibers and extrude it into pellets. The screw temperature is 80 / 200 / 240 / 300 / 300 / 300°C, the rotation speed is 120 rpm, and the residence time of the material in the screw After 8 minutes, the extruded material was cooled, cut into pellets by a pelletizer, and dried in a vacuum oven at 80°C for 35 hours to obtain a PET / PA66 / glass fiber high-performance composite material.

[0021] The properties of the pure PA66 glass fiber reinforced material and the composite mater...

Embodiment 2

[0023] The raw material components are: 60 parts of PET, 20 parts of PA66, 1.5 parts of EAA, 2 parts of SMA, 1.5 parts of antioxidant 1098, 1.3 parts of antioxidant 264, 3.7 parts of erucamide, and 10 parts of short glass fibers.

[0024] First, mix PET, PA66, PBO, EAA, SMA, antioxidant 1098, antioxidant 264, and erucamide on a high-speed mixer. The speed of the high-speed mixer is 5000 rpm. Then mix the mixture with short glass fibers Put them into a twin-screw extruder together and extrude them into pellets. The screw temperature is 150 / 200 / 230 / 280 / 280 / 280°C, the rotation speed is 240 rpm, and the residence time of the material in the screw is 3 minutes. After the extruded material is cooled, it is cut into pellets by a pelletizer to obtain pellets, which are dried in a vacuum oven at 160°C for 5 hours to obtain a PET / PA66 / glass fiber high-performance composite material.

[0025] The properties of the pure PA66 glass fiber reinforced material and the composite material obtai...

Embodiment 3

[0027] The raw material components are by weight: 30 parts of PET, 20 parts of PA66, 2 parts of SBS-g-MAH, 3 parts of EVOH, 2 parts of antioxidant 1010, 1 part of antioxidant 168, 2 parts of ethylene bis-fatty amide, 40 parts long fiberglass.

[0028]First, mix PET, PA66, SBS-g-MAH, EVOH, antioxidant 1010, antioxidant 168, and ethylene bis-fatty amide on a high-speed mixer. The speed of the high-speed mixer is 7500 rpm. Put it into a twin-screw extruder together with short glass fibers and extrude it into pellets. The screw temperature is 100 / 200 / 220 / 270 / 270 / 270°C, the rotation speed is 600 rpm, and the residence time of the material in the screw After cooling the extruded material for 1 minute, it is cut into pellets by a pelletizer, and dried in a vacuum oven at 120°C for 24 hours to obtain a PET / PA66 / glass fiber high-performance composite material.

[0029] The properties of the pure PA66 glass fiber reinforced material and the composite material obtained above are tested,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
impact strengthaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

The present invention is process of preparing engineering plastic with recovered polyethylene terephthalate (PET). The present invention prepares engineering plastic with recovered PET, polyamide 66 (PA66) with smelting point and viscosity near that of PET, reaction compatilizer for improving the compatibility, glass fiber for high rigidity of the composite material, antioxidant and lubricant. The composite PET / PA66 / glass fiber material with the performance of engineering plastic is prepared through mixing all the materials except glass fiber in a high speed stirrer to obtain mixture, blending the mixture with glass fiber at certain temperature and rotation speed and pelletizing in a double screw extruder. The composite PET / PA66 / glass fiber material has toughness and strength obviously higher that of composite PA66 / glass fiber material and may be used to latter.

Description

technical field [0001] The invention relates to a method for preparing engineering plastics by recycling polyethylene terephthalate (PET), in particular to a method for recycling polyethylene terephthalate and polyamide 66 by a twin-screw extruder , Reaction compatibilizer, antioxidant, lubricant and glass fiber are reacted and blended to obtain a new method of composite material with engineering plastic properties. The invention belongs to the technical field of polymer processing. Background technique [0002] Polyethylene terephthalate (PET) is widely used in the bottle material of soft drinks such as Coca-Cola, and the use of a large number of bottles will pollute the environment if they are not recycled. At present, the output of soft drinks in my country is increasing at an average annual growth rate of more than 20%, and the demand for PET bottles for packaging is also increasing at a rate of 18%. According to statistics, about 1.4 million tons of PET bottles were d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/03C08K7/14B29B9/12B29C47/40C08L77/06C08L63/00C08L75/04C08L71/00C08L23/08C08L51/00
Inventor 戚嵘嵘周宇周持兴
Owner SHANGHAI JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com