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Preparation of composite polyethylene/glass material

A glass fiber and composite material technology, applied in the field of polyethylene/glass fiber composite material preparation, can solve the problems of poor heat resistance, insufficient rigidity, and no improvement in performance, and achieve the effects of expanding the scope of use, simple method, and improved performance

Inactive Publication Date: 2009-02-04
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its insufficient rigidity and poor heat resistance limit its wider application
In order to improve its shortcomings of insufficient rigidity and poor heat resistance, people consider modifying it with glass fiber like engineering plastics, but because polyethylene is a non-polar polymer, its interface compatibility with glass fiber is poor, so simply adding glass fiber The material performance of the glass fiber has not been improved, but has also declined. In order to make the glass fiber strengthen the polyethylene, the interface problem between the glass fiber and the polyethylene must be solved.
[0003] In order to solve the problem of poor interfacial compatibility between polyethylene and glass fiber, some researches have been carried out, such as Huang Renyi and others have carried out research work on the mechanical properties of dynamic injection molding short glass fiber reinforced high density polyethylene (Engineering Plastics Application, 2006, 34(1), 26), they added polyethylene and polyethylene-vinyl acetate mixture grafted maleic anhydride as a compatibilizer, mainly from the processing method that is to use electromagnetic dynamic injection molding machine to improve polyethylene and short The interface problem of glass fiber, although the interface problem of polyethylene and glass fiber has been improved to a certain extent, but it is still not ideal, so the obtained performance is not good, the highest tensile strength is 36MPa, and the impact strength is not more than 3.6KJ / m 2 Compared with pure high-density polyethylene, the tensile strength is slightly improved, while the impact strength is still significantly reduced, and the performance is far from the effect of glass fiber reinforced engineering plastics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The raw material components by weight are: 40 parts of high-density polyethylene, 15 parts of polyethylene terephthalate, 20 parts of ethylene-acrylic acid copolymer, 2 parts of antioxidant 1010, and 3 parts of antioxidant 168 , 20 parts of long glass fiber.

[0017] First, mix high-density polyethylene, polyethylene terephthalate, ethylene-acrylic acid copolymer, antioxidant 1010, and antioxidant 168 on a high-speed mixer. The speed of the high-speed mixer is 5000 rpm, and then Put the mixture and long glass fiber into a twin-screw extruder and extrude into pellets. The screw temperature is 80 / 160 / 180 / 240 / 240 / 240℃, the speed is 120 rpm, and the material is in the screw. The residence time is 5 minutes. After the extruded material is cooled, it is pelletized by a pelletizer to obtain pellets, which are dried at 80°C in a vacuum oven for 35 hours to obtain a high-density polyethylene / glass fiber high-performance composite material.

[0018] The performance test of the pure h...

Embodiment 2

[0020] The raw material components by weight are: 60 parts of high-density polyethylene, 6 parts of polyamide, 3 parts of maleic anhydride grafted polyethylene copolymer, 0.5 parts of antioxidant 1098, 0.5 parts of antioxidant 264, long glass 30 parts of fiber.

[0021] First mix the high-density polyethylene, polyamide, maleic anhydride grafted polyethylene copolymer, antioxidant 1098, and antioxidant 264 on a high-speed mixer. The speed of the high-speed mixer is 6000 rpm, and then the mixture is mixed. Put the long glass fiber into a twin-screw extruder and extrude into pellets. The temperature of the screw is 150 / 200 / 240 / 280 / 280 / 280℃, the speed is 600 rpm, and the residence time of the material in the screw It is 1 minute. After the extruded material is cooled, it is cut by a pelletizer to obtain pellets, which are dried in a vacuum oven at 120°C for 10 hours to obtain a high-density polyethylene / glass fiber high-performance composite material.

[0022] The performance test of...

Embodiment 3

[0024] The raw material components by weight are: 85 parts of high-density polyethylene, 1 part of urea-formaldehyde resin, 1 part of glycidyl methacrylate grafted polyethylene copolymer (GMA-g-PE), 2,6-di-tert-butyl -4-methylphenol (antioxidant 264) 1 part, 4,4'-(β,β'-dihydroxydipropoxyphenyl) 2,2-propane (bisphenol A) 2 parts, short glass fiber 10 servings.

[0025] First, high-density polyethylene, urea-formaldehyde resin, glycidyl methacrylate grafted polyethylene copolymer (GMA-g-PE), 2,6-di-tert-butyl-4-methylphenol (antioxidant 264) , 4,4'-(β,β'-dihydroxydipropoxyphenyl) 2,2-propane (bisphenol A) is mixed evenly on a high-speed mixer, the speed of the high-speed mixer is 8000 rpm, and then the mixture The material and short glass fiber are put into a twin-screw extruder and extruded into pellets. The screw temperature is 80 / 120 / 160 / 180 / 180 / 180℃, the speed is 180 rpm, and the material stays in the screw. The time is 3 minutes. After the extruded material is cooled, it is pel...

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Abstract

The present invention is preparation process of composite polyethylene / glass material. The composite polyethylene / glass material is prepared through mixing polyethylene, polar polymer, high molecular reaction compatilizer and antioxidant in a high speed stirrer; mixing the mixture with glass fiber reactively at certain temperature and rotation speed, extruding and pelletizing in a double screw extruder. The composite polyethylene / glass material greatly improved interface compatibility between polymer and glass fiber, high strength, high toughness, high heat resistance and expanded application range.

Description

Technical field [0001] The invention relates to a method for preparing a polyethylene / glass fiber composite material. A twin-screw extruder is used to react and blend polyethylene, a polar polymer, a polymer reaction compatibilizer, an antioxidant, and glass fiber to obtain Composite materials with high performance. The invention belongs to the technical field of polymer processing. Background technique [0002] Polyethylene is used as a general-purpose plastic due to its excellent properties such as good water resistance, softness, good low-temperature impact resistance, chemical resistance, low price, and easy molding and processing. Its demand is large and its application is wide. However, its insufficient rigidity and poor heat resistance limit its wider application. In order to improve the shortcomings of insufficient rigidity and poor heat resistance, people consider using glass fiber to modify like engineering plastics, but because polyethylene is a non-polar polymer, its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/02C08K7/14B29B9/12B29C47/40C08L77/00C08L69/00C08L67/00C08L23/08
Inventor 戚嵘嵘王昱昊周持兴
Owner 浙江华江科技股份有限公司