Thermoplastic polyamide composite material resistant to surface fatigue wear and preparation method thereof
A thermoplastic polyamide and composite material technology, applied in the field of engineering plastic modification, can solve the problems of small glass fiber size, low water absorption rate, different thermal expansion coefficient, etc., and achieve the effect of improving strength and wear resistance
Active Publication Date: 2021-07-09
JIANGSU BOILN PLASTICS CO LTD
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Problems solved by technology
[0008] The purpose of the present invention is to overcome the difference in thermal expansion coefficient between the parent material and the filling material in the prior art when the modified polyamide is filled with the modified polymer composite material, resulting in a large number of microcracks on the surface of the polyamide composite material and damage To solve the problem, provide a thermoplastic polyamide composite material with high surface fatigue wear resistance and its preparation method
Ultra-fine glass fibers are distributed on the surface of the part. Due to the small size of the glass fibers, the "plowing" damage phenomenon disappears, and the problem of a large number of micro-cracks on the surface of the polyamide composite material caused by the difference in thermal expansion coefficient between the parent material and the filler material is solved. , and low water absorption, high dimensional stability
Method used
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Embodiment 1-10
[0033]The thermoplastic polyamide composite material resistant to surface fatigue and wear disclosed in Examples 1-10 uses polyamide, glass fiber, liquid crystal polymer fiber, heat stabilizer, lubricant, and nucleating agent as main raw materials, and other auxiliary materials. Mixing by adding polyamide resin, heat stabilizer, lubricating dispersant, nucleating agent into the high mixer; then adding the mixed polyamide resin, heat stabilizer, lubricating dispersant, nucleating agent into the twin-screw extruder ; Add glass fiber to the twin-screw extruder at the special fiber feed port 1; then add liquid crystal polymer fibers at the special fiber feed port 2 to the twin-screw extruder; add antioxidants as required, Discharging; drawing strips; cooling in a water tank; drying and pelletizing to obtain the products of the examples. The temperature of each zone of the twin-screw extruder is as follows: the temperature of the first zone is 150-230°C, the temperature of the seco...
Embodiment 1-5
[0043]
[0044] Table 1
Embodiment 6-10
[0046]
[0047] Table 2
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Abstract
The application discloses a thermoplastic polyamide composite material resistant to surface fatigue wear and a preparation method thereof, relates to the technical field of engineering plastic modification, and includes the following components in weight percentage: A) 10-80 parts of polyamide; B) 1-50 parts The glass fiber of part; The diameter of glass fiber is 1-8 micron C) 1-50 part liquid crystal polymer fiber; D) the thermal stabilizer of 0.1-1 part; E) the lubricating dispersant of 0.1-1 part; F ) 0.1-0.5 parts of nucleating agent, the application is filled with ultra-fine glass fibers, due to the small size of ultra-fine glass fibers, small thermal deformation, small overall thermal expansion coefficient of the composite material, thermoplastic polyamide composite material resistant to surface fatigue and wear It has excellent surface fatigue wear resistance and high dimensional stability.
Description
technical field [0001] The invention relates to the technical field of modification of engineering plastics, in particular to a thermoplastic polyamide composite material resistant to surface fatigue and wear and a preparation method thereof. Background technique [0002] Polyamide (PA), also known as nylon, contains polar amide groups in its molecular chain, which can form hydrogen bonds. Through physical or chemical modification, it can be made into engineering plastics with excellent mechanical properties. It has impact resistance and is relatively hard. Engineering plastics, and can be widely used. The advantages of this material are: 1. High crystallinity, high surface hardness, wear resistance, and self-lubricating properties. 2. Good resistance to organic solvents, oil resistance and salt spray resistance. 3. Non-toxic, odorless, good weather resistance. The disadvantage is that due to the amide group, it has high water absorption and is not acid resistant. [000...
Claims
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IPC IPC(8): C08L77/06C08L77/10C08L79/04C08L81/00C08K13/06C08K9/06C08K7/14C08K5/20C08K3/16
Inventor 赵义仁刘艳国赵佰金
Owner JIANGSU BOILN PLASTICS CO LTD