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Micro-foaming injection molding nylon/polyphenylene ether composite material and preparation method thereof

A composite material and micro-foaming technology, applied in the field of polymer materials, can solve the problems of reduced mechanical properties of nylon/PPO, collapse and rupture of gas bubbles, low melt strength, etc. The effect of body strength

Inactive Publication Date: 2018-07-10
SHANGHAI PRET COMPOSITES +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a micro-foamed injection molding nylon / PPO composite material and its preparation method, the melt strength of the material is sufficient to support cell growth during the foaming process, and to solve the existing problems. In the foaming process of the existing technology, the low melt strength leads to the collapse and rupture of the bubbles caused by a large amount of gas escaping, which solves the problems of the mechanical properties of nylon / PPO caused by foaming.

Method used

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  • Micro-foaming injection molding nylon/polyphenylene ether composite material and preparation method thereof
  • Micro-foaming injection molding nylon/polyphenylene ether composite material and preparation method thereof
  • Micro-foaming injection molding nylon/polyphenylene ether composite material and preparation method thereof

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Effect test

Embodiment 1

[0021] The present embodiment provides a kind of preparation method of microfoam injection molding nylon / PPO composite material, comprises the steps:

[0022] 74.8 parts of nylon, 24 parts of PPO, 1 part of toughening agent and 0.2 part of antioxidant are put into a high-speed mixer according to the weight ratio and mixed for 4-6min to obtain a homogeneous mixture of the above components. Put the mixture of the above components into the twin-screw extruder from the hopper to obtain nylon / PPO composite material; the temperature of each section of the extruder is as follows: Zone 1 250-270°C, Zone 2 260-280°C, Zone 3 270-280°C , the fourth zone is 270-280°C, the fifth zone is 270-280°C, the sixth zone is 270-280°C, the seventh zone is 270-280°C, the head temperature is 270-280°C, the pressure is 12-18MPa, and the material stays in the extruder for 1 ~2min.

[0023] Dry the nylon / PPO composite material in an oven at 120°C for 4 hours, and mix it with the foaming agent masterbatc...

Embodiment 2

[0026] 72.8 parts of nylon, 24 parts of PPO, 3 parts of toughening agent and 0.2 part of antioxidant are put into the high-speed mixer according to the weight ratio and mixed for 4-6min to obtain a homogeneous mixture of the above components. Put the mixture of the above components into the twin-screw extruder from the hopper to obtain nylon / PPO composite material; the temperature of each section of the extruder is as follows: Zone 1 250-270°C, Zone 2 260-280°C, Zone 3 270-280°C , the fourth zone is 270-280°C, the fifth zone is 270-280°C, the sixth zone is 270-280°C, the seventh zone is 270-280°C, the head temperature is 270-280°C, the pressure is 12-18MPa, and the material stays in the extruder for 1 ~2min.

[0027] Dry the nylon / PPO composite material in an oven at 120°C for 4 hours, and mix it with the foaming agent masterbatch in a mixer after cooling to obtain a mixture of the two; put the mixture into an injection molding machine, and injection mold it to obtain a microf...

Embodiment 3

[0030] 70.8 parts of nylon, 24 parts of PPO, 5 parts of toughening agent and 0.2 part of antioxidant are put into the high-speed mixer according to the weight ratio and mixed for 4-6min to obtain a homogeneous mixture of the above components. Put the mixture of the above components into the twin-screw extruder from the hopper to obtain nylon / PPO composite material; the temperature of each section of the extruder is as follows: Zone 1 250-270°C, Zone 2 260-280°C, Zone 3 270-280°C , the fourth zone is 270-280°C, the fifth zone is 270-280°C, the sixth zone is 270-280°C, the seventh zone is 270-280°C, the head temperature is 270-280°C, the pressure is 12-18MPa, and the material stays in the extruder for 1 ~2min.

[0031] Dry the nylon / PPO composite material in an oven at 120°C for 4 hours, and mix it with the foaming agent masterbatch in a mixer after cooling to obtain a mixture of the two; put the mixture into an injection molding machine, and injection mold it to obtain a microf...

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Abstract

The invention discloses a micro-foaming injection molding nylon / polyphenylene ether composite material and a preparation method thereof, wherein the micro-foaming injection molding nylon / polyphenyleneether composite material comprises, by weight, 30-80 parts of nylon, 20-65 parts of PPO, 1-10 parts of a toughening compatibilizer, and 0.1-2 parts of an antioxidant. According to the present invention, by adding the toughening compatibilizer, the nylon can form the micro-cross-linked structure during the extrusion so as to improve the strength of the nylon melt and easily achieve the uniform anddense micropores, wherein the toughening compatibilizer can improve the strength of the melt, improve the toughness of the composite material, and easily achieve good mechanical property; along withthe adding of the toughening compatibilizer and the PPO resin, the diameter of the foam hole is gradually decreased, and the density of the foam hole is increased, such that the rigidity and the toughness are improved, and the heat resistance is improved; and with the method, the cost of the raw materials is saved, and the heat-resistant micro-foaming injection molding nylon / PPO composite materialwith advantages of fine, uniform and dense foam hole and good mechanical property is obtained.

Description

technical field [0001] The invention relates to a microfoaming injection molding nylon / polyphenylene ether composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Nylon is an engineering plastic with excellent performance. Due to its high crystallinity, it has excellent solvent resistance, and also has the advantages of high mechanical strength and easy processing, but its impact strength is low and heat resistance is relatively poor. And because of its high water absorption, the dimensional stability of the product is poor, thus limiting its application in the electrical, building materials and electronics industries. [0003] Polyphenylene ether (abbreviated as PPO) is one of the five general-purpose engineering plastics in the world. It has the advantages of high rigidity, high heat resistance, flame retardancy, and high strength. Therefore, the processing of PPO can be improved by preparing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L71/12C08J9/08
CPCC08J9/08C08J9/0061C08J2203/02C08J2205/044C08J2377/02C08J2471/12
Inventor 赵丽萍蔡青郑杭景田兰周文
Owner SHANGHAI PRET COMPOSITES