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Nylon-based nano composite material and preparation method thereof

A nano-composite material and inorganic nano-filler technology, applied in the field of nylon-based nano-composite materials and its preparation, can solve the problems of low HDPE fuel barrier efficiency, poor weight reduction effect of the car body, and low barrier resin content, and achieve high and low temperature comprehensive Superior performance, outstanding barrier performance, and high production efficiency

Inactive Publication Date: 2012-08-01
徐东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the multi-layer co-extrusion technology has improved the HDPE fuel tank, due to the low barrier resin content and the low barrier efficiency of HDPE itself to fuel, the barrier capacity of this six-layer co-extruded fuel tank is only 0.9g / m 2 24h, although it can still meet the emission standards, but with the gradual increase of emission standards, its ability to block fuel will not be able to meet the requirements
At the same time, the multi-layer co-extrusion equipment is complicated, and the cost of equipment investment accounts for a large proportion of the product cost, which is also an important reason why the cost of plastic fuel tanks is higher than that of metal fuel tanks for a long time
On the other hand, due to the relatively poor mechanical properties of HDPE itself, the fuel tank products must be thicker to meet the mechanical requirements, making the product less effective in reducing weight on the car body
Finally, because the HDPE fuel tank prepared by multi-layer co-extrusion has a heterogeneous structure, it cannot be recycled and reused

Method used

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Experimental program
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Effect test

preparation example Construction

[0049] The preparation method of nylon-based low-permeability nanocomposite material, comprises the steps:

[0050] 1) Add nylon, barrier polymer filler, and toughening agent into a high-speed mixer, drop in dispersing oil (process oil), and mix for 5-10 minutes;

[0051] 2) Add barrier inorganic nano fillers and additives into the high-speed mixer, and mix with the mixture obtained in step 1) in the high-speed mixer for 5-10 minutes to obtain a blended material;

[0052] 3) Add the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt extrude at a temperature of 180°C-290°C, a twin-screw aspect ratio of 36-56, and a host speed of 100-600rpm;

[0053]4) cutting and sieving after cooling;

[0054] 5) Packaging.

[0055] The above main material nylon is selected from PA6, PA66, PA12, PA1212 or any mixture of the above resins; the barrier polymer filler is selected from PET, PBT, PPO, EVOH or any mixture thereof; the barrier inorganic nano filler is...

Embodiment 1

[0056] Embodiment 1 The preparation method of nylon-based low-permeability nanocomposite material, the specific steps are as follows:

[0057] 1) Add 681kg of main material PA681, 5kg of barrier polymer filler PET (intrinsic viscosity 0.5-1.2dl / g), 10kg of toughening agent maleic anhydride grafted POE (UF-MOE, graft rate 2%) into high-speed mixing machine, after dropping the dispersing oil, mix for 5-10 minutes;

[0058] 2) 3kg of barrier inorganic nano-filler nano-kaolin (NYLOK 171), 0.3kg of alcoholysis-resistant agent (Bruggemann H 3337), 0.4kg of temperature-resistant and anti-aging agent (antioxidant 1098), lubricant (lubricant TAF) 0.3kg is added into the high mixer, and the mixture obtained in step 1) is mixed in the high mixer for 5-10 minutes to obtain a blended material;

[0059] 3) Add the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt extrude at a temperature of 180°C-230°C, twin-screw aspect ratio of 44, and a host speed of 250...

Embodiment 2

[0063] Embodiment 2 The preparation method of nylon-based low-permeability nanocomposite material, the specific steps are as follows:

[0064] 1) Main ingredient PA6 (intrinsic viscosity 2.4-5.0dl / g) 74kg, barrier polymer filler ethylene-vinyl alcohol copolymer EVOH (vinyl content <90%, Japan Kuraray EVOH F101A) 8kg, toughening agent horse Add 12 kg of toric anhydride grafted POE (UF-MOE, graft rate 2%) into the high-speed mixer, drop in the dispersing oil, and mix for 5-10 minutes;

[0065] 2) 5 kg of barrier inorganic nano-filler nano-montmorillonite (DK2), 0.3 kg of alcoholysis-resistant agent (Bruggemann H 3337), 0.4 kg of temperature-resistant and anti-aging agent (antioxidant 1098), lubricant (lubricating agent) Agent OP wax) 0.3kg is added into the high mixer, and the mixture obtained in step 1) is mixed in the high mixer for 5-10 minutes to obtain a blended material;

[0066] 3) Add the blended material obtained in step 2 into a twin-screw extruder, mix well, and melt...

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PUM

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Abstract

The invention discloses a nylon-based nano composite material and a preparation method thereof. The nylon-based nano composite material consists of the following components in percentage by weight: 25 to 96.7 percent of polyamide resin, 0.5 to 30 percent of blocking macromolecular filler, 0.5 to 10 percent of blocking inorganic nano filler, 2 to 30 percent of toughening agent, and 0.3 to 5.0 percent of aid. The nylon-based nano composite material has wide raw material source, can be prepared into injection molding grade and blow molding grade products, has high blocking performance for polar and non-polar volatile small molecular substances such as fuel oil, ethanol, oxygen and carbon dioxide, and has excellent high and low temperature comprehensive performance; and the products can be applied to the occasions with high requirement for the blocking performance such as fuel tanks, lubricating oil pots, fuel pipelines and packing materials.

Description

[technical field] [0001] The invention relates to the field of polymer materials, in particular to a nylon-based nanocomposite material and a preparation method thereof. [Background technique] [0002] Barrier material is a new type of functional material, which has shielding ability to small molecule gas, liquid, water vapor, fragrance and medicinal smell, and sometimes can also block light (ultraviolet rays). Barrier materials are widely used in the fields of automobile, food, medicine, precision instruments and fine chemistry. The permeation process of small molecular gases or liquids to polymers is divided into four stages: (1) small molecules are adsorbed on the surface of polymers; (2) small molecules are dissolved in polymers; (3) small molecules pass through with a certain concentration gradient. polymer; (4) small molecules desorb on the other surface of the polymer. Any factor that can delay the occurrence of any of these processes will help improve the barrier p...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08L67/02C08L71/12C08L23/08C08L51/06C08K13/02C08K3/34B29C47/92B29C48/92
CPCB29C48/40B29C48/625B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 徐东徐永任昌义
Owner 徐东
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