Preparation and application of high-wear-resistance modified nylon composition
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A technology of modified nylon and composition, applied in the field of preparation and application of high wear-resistant modified nylon composition, can solve the problems of general wear resistance, large addition amount and high cost, achieve high wear resistance index, improve processing The effect of improving wear resistance
Inactive Publication Date: 2012-01-18
BEIJING SHOUSU NEW MATERIAL TECH
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Problems solved by technology
In recent years, the modified wear-resistant PA66 developed by using PTFE micro-powder wear-resistant agent has been widely favored by the market and has excellent wear resistance. Compared with molybdenum sul
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Embodiment 1
[0028] Formula: 60 parts by weight of PA66 resin, 38 parts by weight of PPA resin, and 2 parts by weight of other additives.
[0029] Preparation of PA66 Composition
[0030] PA66, PPA, and other additives are mixed uniformly under high-speed stirring at a weight ratio of 60 parts, 38 parts, and 2 parts, and then melted, kneaded and granulated in a twin-screw extruder. The temperature of each section of the barrel is controlled at 255-330°C, and the twin-screw speed is 350r / min.
Embodiment 2
[0032] Formula: 58 parts by weight of PA66 resin, 35 parts by weight of PPA resin, 5 parts by weight of toughening agent, and 2 parts by weight of other additives.
[0033] Preparation of PA66 Composition
[0034] PA66, PPA, toughening agent, and other additives are mixed uniformly under high-speed stirring at a weight ratio of 58 parts, 35 parts, 5 parts, and 2 parts, and then melted, kneaded and granulated in a twin-screw extruder. The temperature of each section of the barrel is controlled at 255-330°C, and the twin-screw speed is 350r / min.
Embodiment 3
[0036] Formula: 55 parts by weight of PA66 resin, 35 parts by weight of PPA, 5 parts by weight of toughening agent, 3 parts by weight of anti-wear agent (α-alumina), and 2 parts by weight of other additives.
[0037] Preparation of PA66 Composition
[0038] Mix PA66, PPA, toughening agent, anti-wear agent (α-alumina) and other additives according to the weight ratio of 55 parts, 35 parts, 5 parts, 3 parts and 2 parts under high-speed stirring, and then in the twin-screw Melt kneading and granulation in an extruder. The temperature of each section of the barrel is controlled at 255-330°C, and the twin-screw speed is 350r / min.
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Abstract
The invention discloses preparation and application of a high-wear-resistance modified nylon composition. The high-wear-resistance modified nylon composition comprises the following components in percentage by weight: 30-70 parts of PA66 (Polyamide) resin, 20-50 parts of PPA (Polyphthalamide) resin, 4-8 parts of toughening agent, 4-7 parts of wear-resisting agent and 2-5 parts of other auxiliary agents. The material has wide application in the fields of automobiles, machinery and the like and has an obvious advantage of substituting metal in the aspects of a wear-resistant shaft bushing, a slip sheet and the like. A preparation method for the high-wear-resistance modified nylon composition comprises the following process steps of: uniformly mixing the raw materials according to a proportion; adding into a double-screw extruder; and controlling the temperature at 250-330 DEG C for granulation to obtain the high-wear-resistance modified nylon composition. The high-wear-resistance modified nylon composition with superior comprehensive performance is prepared.
Description
[technical field] [0001] The invention relates to the technical field of polymer materials, in particular to the preparation and application of a highly wear-resistant modified nylon composition. [technical background] [0002] Nylon has good self-lubricating properties, wear resistance, oil resistance and good comprehensive mechanical properties, and has been widely used in fields requiring high wear resistance such as machinery, transmission, and sealing. At present, there are several types of wear-resistant PA66 technologies, such as rubber elastomer modified PA66, graphite modified PA66, molybdenum sulfide modified PA66, etc. In recent years, the modified wear-resistant PA66 developed by using PTFE micro-powder wear-resistant agent has been widely favored by the market and has excellent wear resistance. Compared with molybdenum sulfide modified PA66, white products can be prepared, but both have small additions. , general wear resistance; large amount of addition, diffi...
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