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Low-dielectric-constant polypropylene composite material and preparation method thereof
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A technology of low dielectric constant and composite material is applied in the field of low dielectric constant polypropylene composite material and its preparation.
Pending Publication Date: 2021-12-10
重庆会通科技有限公司
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Abstract
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Problems solved by technology
The current mainstream glass fiber reinforced polypropylene material has a dielectric constant of 2.4-2.7, which is difficult to further reduce
Method used
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Embodiment 1
[0044] S1: Bamboo fibers are soaked in saturated NaOH aqueous solution for 30 minutes, washed to neutrality, soaked in silanecoupling agent KH550 for 20 minutes, washed, filtered, and dried at 80° C. for 2 hours to obtain modified bamboo fibers;
[0045] S2: Take 15 parts of glass fiber and 5 parts of modified bamboo fiber and mix evenly to obtain mixed fiber;
[0046] S3: Weigh 77 parts of polypropylene, 3 parts of compatibilizer, 0.1 part of lubricant, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, and 0.3 part of weathering agent and mix them evenly to obtain a mixture;
[0047] S4: Feed the compound in step S3 from the first barrel of the twin-screw extruder, feed the mixed fiber in step S2 from the sixth barrel, melt, extrude, and granulate to obtain Low dielectric constant polypropylene composite material E1.
Embodiment 2
[0049] S1: put wood fiber into saturated NaHCO 3 Soak in aqueous solution for 30 minutes, wash until neutral, soak in silanecoupling agent KH570 for 20 minutes, wash, filter, and dry at 80°C for 2 hours to obtain modified wood fiber;
[0050] S2: Take 15 parts of glass fiber and 10 parts of modified wood fiber and mix evenly to obtain mixed fiber;
[0051] S3: Weigh 72 parts of polypropylene, 3 parts of compatibilizer, 0.1 part of lubricant, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, and 0.3 part of weathering agent and mix them evenly to obtain a mixture;
[0052] S4: Feed the compound in step S3 from the first barrel of the twin-screw extruder, feed the mixed fiber in step S2 from the sixth barrel, melt, extrude, and granulate to obtain Low dielectric constant polypropylene composite material E2.
Embodiment 3
[0054] S1: Put jute fiber into saturated Ca(OH) 2Soak in aqueous solution for 30 minutes, wash until neutral, soak in silane coupling agent A-151 for 20 minutes, wash, filter, and dry at 80°C for 2 hours to obtain modified jute fiber;
[0055] S2: Get 15 parts of glass fiber and 15 parts of modified jute fiber and mix evenly to obtain mixed fiber;
[0056] S3: Weigh 67 parts of polypropylene, 3 parts of compatibilizer, 0.1 part of lubricant, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, and 0.3 part of weathering agent and mix them uniformly to obtain a mixture;
[0057] S4: Feed the mixed material in step S3 from the first barrel of the twin-screw extruder, feed the mixed fiber in step S2 from the sixth barrel, melt, extrude, and pelletize to obtain Low dielectric constant polypropylene composite material E3.
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Abstract
The invention discloses a preparation method of a low-dielectric-constant polypropylenecomposite material. The preparation method comprises the following steps: modifying plant fibers, uniformly mixing the modified plant fibers and glass fibers according to a mass ratio of 1: (1-3) to obtain mixed fibers, mixing materials, and conducting extruding. In the process of plantfiber modification, alkali liquor and a silanecoupling agent are sequentially used for treating plant fibers, so dust and cuticles on the surfaces of the plant fibers can be effectively removed, interfacial bonding force is further improved, a dielectric constant is reduced, and the warping property and the surface floating fiber state of the polypropylene material are effectively improved. The invention further discloses the low-dielectric-constant polypropylenecomposite material which is excellent in various performance indexes and is applicable to a current 5G base stationradome shell.
Description
technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a low dielectric constant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is one of the five general-purpose plastics. Because of its high cost performance and excellent comprehensive performance, it is widely used in the fields of automobiles, home appliances and other daily necessities; especially in recent years, with the consideration of lightweight and environmental protection, polypropylene modified materials have also been gradually used. In the application field of 5G products, especially in the field of base stations, it plays an extremely important role. [0003] Polypropylene material with low dielectric constant is regarded as an ideal material for the housing of 5G communication equipment due to its low density and low cost. The current mainstream glass fiber reinforced polypropylen...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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