High-flow heat-conducting nylon composite material, preparation method and application thereof

A nylon composite material and high-flow technology, applied in the field of composite materials, can solve the problems of poor fluidity of nylon products, low fluidity of nylon materials, and application limitations, and achieve the effect of improving fluidity, significant technology and market value.

Inactive Publication Date: 2019-09-10
JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of thermally conductive fillers can make the fluidity of nylon products worse. When the amount added is too high (higher than 50wt%), the resulting nylon material cannot meet the requirements of injection molded thin-walled parts due to its low fluidity, making it App is restricted

Method used

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  • High-flow heat-conducting nylon composite material, preparation method and application thereof

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Embodiment approach

[0025] In the present invention, the type of the antioxidant is not particularly limited, and it may be various existing auxiliary agents capable of improving the oxidation resistance of the nylon composite material. According to a preferred embodiment of the present invention, the antioxidant is a composite antioxidant containing a primary antioxidant and an auxiliary antioxidant, wherein the primary antioxidant is a hindered phenolic antioxidant (such as 1010), the auxiliary antioxidant is selected from at least one of phosphite antioxidants, mercaptan antioxidants and thioester antioxidants. In addition, the weight ratio of the primary antioxidant to the secondary antioxidant is preferably 1:(1-3).

[0026] The present invention is not particularly limited to the type of the lubricant, and can be various existing auxiliary agents that can improve the lubricating performance of nylon composite materials, and its specific examples include but are not limited to: pentaerythrit...

Embodiment 1

[0032]Weigh various raw materials according to the material ratio in Table 1, and mix nylon resin (PA6, relative viscosity of 2), thermally conductive filler (magnesium hydroxide), melamine cyanurate, glass fiber (monofilament diameter 10-13 μ m and length 3 ~5mm chopped glass fiber), toughening agent (polyethylene grafted maleic anhydride (PE-MAH), polyethylene graft rate 0.4wt%), whitening agent (rutile titanium dioxide), antioxidant (Compound of 1010 and 168 according to the weight ratio of 1:2), lubricant (ethylene bis stearic acid amide) and coupling agent (KH-550) were added to the high-speed mixing pot and mixed for 3 minutes to obtain a premix. Afterwards, the premixed material is fed into a twin-screw extruder from the main feeding port, and subjected to melt extrusion, cooling, and granulation to obtain a high-fluidity heat-conducting nylon composite material. Wherein, the extrusion temperature of the twin-screw extruder is set at 200-260° C., and the rotation speed ...

Embodiment 2

[0034] Weigh various raw materials according to the ratio of materials in Table 1, nylon resin (PA6, relative viscosity is 2.4), thermal conductive filler (aluminum hydroxide), melamine cyanurate, glass fiber (monofilament diameter 10 ~ 13μm and length 3 ~5mm chopped glass fiber), toughening agent (polyethylene grafted maleic anhydride (PE-MAH), polyethylene graft rate 1.0wt%), whitening agent (rutile titanium dioxide), antioxidant (Compound of 1010 and 168 according to the weight ratio of 1:2), lubricant (butyl stearate) and coupling agent (KH-560) were added into a high-speed mixing pot and mixed for 3 minutes to obtain a premix. Afterwards, the premixed material is fed into a twin-screw extruder from the main feeding port, and subjected to melt extrusion, cooling, and granulation to obtain a high-fluidity heat-conducting nylon composite material. Wherein, the extrusion temperature of the twin-screw extruder is set at 200-260° C., and the rotation speed is set at 250 rpm.

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Abstract

The invention belongs to the composite material field and discloses a high-flow heat-conducting nylon composite material, a preparation method and an application thereof. The high-flow heat-conductingnylon composite material comprises nylon resin, heat conductive filler, melamine cyanurate and optionally glass fiber, toughening agent, whitening agent, antioxidant, lubricant and coupling agent, The heat conductive filler is hydroxide, and the weight ratio of the heat conductive filler, the melamine cyanurate and the nylon resin is (0.5-2):(0.04-0.13): 1. The nylon composite material provided by the invention has the advantages of high fluidity and high thermal conductivity, and can be well applied in the fields of home appliances, lighting and the like, especially in some thin-wall products, and has remarkable technical and market value.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a high-flow heat-conducting nylon composite material and a preparation method and application thereof. Background technique [0002] Thermally conductive nylon is widely used as a heat dissipation material in the field of LED lighting due to its easy processing, low density, low cost, high thermal conductivity, and superior heat radiation performance. It is the preferred material to solve the heat dissipation problem of LED lamps. Thermally conductive nylon is to effectively improve the thermal conductivity by adding a certain amount of thermally conductive filler to the nylon resin. General thermal conductive fillers are magnesium oxide, zinc oxide, boron nitride, aluminum nitride, magnesium hydroxide, aluminum hydroxide, etc. However, the addition of thermally conductive fillers can make the fluidity of nylon products worse. When the amount added is too high (hig...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L51/06C08K5/3492C08K3/22C08K7/14C08K5/134C08K5/526C08K13/04C09K5/14
CPCC08K2003/2224C08K2003/2227C08L77/02C08L2205/20C09K5/14C08L51/06C08K5/34928C08K3/22C08K7/14C08K5/1345C08K5/526C08K13/04
Inventor 陈敏辉申应军刘凯
Owner JINYOUNG XIAMEN ADVANCED MATERIALS TECH CO LTD
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