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Nylon 66 composite material, preparation method and application thereof
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A composite material, nylon technology, applied in the field of nylon 66 composite material and its preparation, can solve the problems of high raw material cost, unsuitable for special working conditions, poor fluidity, etc.
Inactive Publication Date: 2020-03-17
宁波华腾首研新材料有限公司
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Problems solved by technology
[0003] In pure PA66 resin modified materials, there are problems such as high molding shrinkage (1.6-1.9%), poor resilience, low crystallization efficiency, poor fluidity, unstable workpiece size, and high raw material costs.
At present, there are reports of modifying the composite material of PA66 resin and PA6 resin (namely nylon 6). For example, in patent CN 201611014288.3, nylon 66 is compounded with branched nylon 6, and maleic anhydride grafted POE is used as toughening material. At the same time, the toughened nylon 66 material is prepared with lubricants, antioxidants, etc., but the mechanical properties, insertion force performance and crystallization effect of the material still need to be improved, and it is not suitable for special working conditions, such as the preparation of automobile buckles.
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preparation example Construction
[0038] The invention provides the preparation method of described nylon 66 composite material, comprises the following steps:
[0039] The nylon 66, linear nylon 6, toughening agent, lubricant, nucleating agent and antioxidant are mixed, plasticized and melted, extruded and pelletized to obtain a nylon 66 composite material.
[0040] The invention mixes nylon 66, linear nylon 6, toughening agent, lubricant, nucleating agent and antioxidant to obtain a mixed material. The present invention has no special limitation on the mixing, as long as the preparation raw materials can be mixed evenly; specifically, each preparation raw material can be placed in a mixer and mixed for 15 minutes at a rotational speed of 10 rpm.
[0041] After the mixed material is obtained, the present invention plasticizes, melts, extrudes and pelletizes the mixed material to obtain the nylon 66 composite material. In the present invention, the plasticizing melting and extruding are preferably carried out...
Embodiment 1
[0053] A preparation method of nylon 66 composite material, comprising the following steps:
[0054] ① Ingredients: PA66 resin 70kg, linear PA6 resin 30kg, toughening agent 8kg, lubricant 0.5kg, nucleating agent 0.5kg, antioxidant 0.5kg.
[0055] ② Mixing: Pour the prepared raw materials into a mixer, and mix for 15 minutes at a speed of 10 rpm to obtain a mixture, and store it at room temperature for later use.
[0056] 3. Preparation: Extrude the mixture after being plasticized and melted by a twin-screw extruder, then cool, pelletize and package to obtain a nylon 66 composite material; wherein, the screw speed is 350rpm; the speed of the twin-screw extruder The barrel is divided into 11 temperature control zones from the feeding end to the machine head, and the temperature of each temperature control zone is 265°C, 270°C, 270°C, 270°C, 265°C, 265°C, 260°C, 260°C , 260°C, 265°C and 270°C.
Embodiment 2
[0058] The preparation method of nylon 66 composite material in the present embodiment is basically the same as embodiment 1, the difference is that the preparation raw materials include the following components:
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Abstract
Belonging to the technical field of composite materials, the invention provides a nylon 66 composite material, a preparation method and application thereof. The nylon 66 composite material provided bythe invention comprises the following preparation raw materials by mass percentage: 45.4-90.8% of nylon 66; 5-45.4% of linear nylon 6; 3-8% of a toughening agent, which is maleic anhydride and acrylate bifunctionalized POE; 0.1-2% of a lubricant; 0.1-2% of a nucleating agent; and 0.1-2% of an antioxidant. According to the invention, nylon 66 and linear nylon 6 are compounded, also the tougheningagent, the lubricant, the nucleating agent and the antioxidant are added, so that the obtained nylon 66 composite material is excellent in comprehensive performance and suitable for preparation of automobile buckles. Meanwhile, the cost of the matrix material linear nylon 6 is lower than that of nylon 66, and after compounding with linear nylon 6, the relative production cost is obviously reduced.
Description
technical field [0001] The invention relates to the technical field of composite materials, in particular to a nylon 66 composite material and its preparation method and application. Background technique [0002] Nylon 66 is polyhexamethylene adipamide, referred to as PA66 resin. It is one of the top five engineering plastics in the world. It is widely used because of its high fatigue strength and rigidity, good heat resistance, low friction coefficient and good wear resistance. Widely used in automobiles, home appliances, electronic appliances and other fields. With the acceleration of the lightweight process of automobiles, PA66 is more and more widely used in the automotive field, and the application requirements are becoming more and more demanding. In order to meet the market demand for material fluidity and rapid injection molding, it is necessary to conduct research on the modification of PA66 resin. [0003] In pure PA66 resin modified materials, there are problems ...
Claims
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Application Information
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