High-stability PA66 modified material and preparation method thereof
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A technology of PA66 and modified materials, which is applied in the field of polymer materials and can solve the problems of high water absorption of nylon materials, affecting mechanical strength and dimensional stability, and limiting the scope of application.
Active Publication Date: 2012-03-21
徐东
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Problems solved by technology
[0003] Due to the high water absorption and large shrinkage of nylon materials, the nylon material after water absorption seriously affects its excellent mechanical strength and dimensional stability, which limits its application range in precision parts and other aspects.
Method used
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Embodiment 1
[0044] Weigh the raw materials according to the following proportions: PA66 resin 75.8%, PA6 resin 10%, wear-resistant agent 2%, composite lubricant 1.5%, antioxidant 0.3%, wollastonite powder 10%, talc powder 0.1%, coupling agent 0.3%. Premixed raw materials, the mixing process is: first mix PA66 resin, PA6 resin, and coupling agent at 100r / min for 1min; then add compound lubricant and other modification additives and mix at 400r / min for 10min to form a mixed material;
[0045] Put the mixed raw materials in a twin-screw extruder for melt extrusion and granulation. The temperature and process optimization of each section of the mixed material in the twin-screw extruder are: 180°C in the first zone, 260°C in the second zone ℃, 260℃ in the third zone, 260℃ in the fourth zone, 240℃ in the fifth zone, 230℃ in the sixth zone, 210℃ in the seventh zone, 210℃ in the eighth zone, and 260℃ in the machine head. The screw speed of the twin-screw extruder is 350r / min.
Embodiment 2
[0047] Weigh the raw materials according to the following proportions: PA66 resin 71.8%, PA6 resin 12%, wear-resistant agent 2%, composite lubricant 1.5%, antioxidant 0.3%, wollastonite powder 12%, talc powder 0.1%, coupling agent 0.3%;
[0048] The preparation process is the same as in Example 1.
Embodiment 3
[0050] Weigh the raw materials according to the following proportions: PA66 resin 69.8%, PA6 resin 13%, wear-resistant agent 2%, composite lubricant 1.5%, antioxidant 0.3%, wollastonite powder 13%, talc powder 0.1%, coupling agent 0.3%;
[0051] The preparation process is the same as in Example 1.
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Abstract
The invention discloses a high-stability PA66 modified material and a preparation method thereof. The modified material consists of the following components in percentage by weight: 65-76 percent of PA66 resin, 10-15 percent of PA6 resin, 2 percent of anti-wear agent, 1.5 percent of composite lubricating agent, 0.3 percent of antioxidant, 10-15 percent of wollastonite in powder, 0.1 percent of talc powder and 0.3 percent of coupling agent. The invention further provides a preparation method of the modified material. By blending the anti-wear agent and the wollastonite in powder and modifying PA66, the prepared nylon material has high mechanical property and high wear resistance, the defect of easy moisture absorption of nylon is overcome, and the size is stable. The high-stability PA66 modified material can be widely applied to the fields of gears, bearings, fan blades, bicycle parts, automobile industry parts, electronics and electrics, precision engineering products, mechanical treatment, sports apparatuses and the like.
Description
technical field [0001] The invention relates to the field of polymer materials, in particular to a PA66 modified material with good stability and a preparation method. Background technique [0002] Nylon 66 (PA66) is the earliest synthetic fiber and the most important product among polyamides. It can be used as both fiber and engineering plastic. Due to its good comprehensive properties, such as high strength, good rigidity, impact resistance, oil and chemical resistance, wear resistance and good self-lubrication, PA66 is widely used in gears, bearings, fan blades, bicycle parts, and automotive industry parts , electrical and electronic, precision engineering products, medical, sports equipment, etc. [0003] Due to the high water absorption and large shrinkage of nylon materials, the nylon material after water absorption seriously affects its excellent mechanical strength and dimensional stability, which limits its application range in precision parts and other aspects. ...
Claims
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