Heat-conducting, wear-resistant and insulated nylon 6 composite material and preparation method thereof

A technology of composite materials and thermally conductive fillers, applied in the field of thermally conductive and wear-resistant insulating nylon 6 composite materials and its preparation, can solve the problems of large loss of mechanical properties and wear resistance

Inactive Publication Date: 2014-02-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Heat-conducting, wear-resistant and insulated nylon 6 composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] (1) Weigh raw materials according to weight ratio: PA6: 20%, 50μm magnesium oxide 30%, 3μm alumina 10%, 50μm flake graphite 10%, carbon fiber 25%, compatibilizer CMG9805 3.5%, silane coupling agent 1.5% , MB-4 0.2%, 168 / 1010 0.4%.

[0041] (2) Add the above-mentioned magnesium oxide, aluminum oxide, and flake graphite into a high-speed mixer, then add a silane coupling agent and mix evenly for later use.

[0042] (3) Add the above uniformly mixed thermally conductive filler together with PA6, processing aids and compatibilizers into a high-speed mixer, mix evenly, and then add them to the main feeding barrel of the twin-screw extruder.

[0043] (4) The above materials are extruded and granulated by a twin-screw extruder to obtain a primary granulated material. The frequency of the twin-screw host is 42Hz, the feeding frequency is 7Hz, and the temperature is 225°C.

[0044] (5) The primary granulated material is added to the main feeding barrel of the single-screw extru...

Embodiment 2

[0046] (1) Weigh raw materials according to weight ratio: PA6: 30%, 50μm alumina 20%, 3μm boron nitride 10%, 50μm flake graphite 15%, carbon fiber 20%, compatibilizer CMG9805 3.5% silane coupling agent 1.5%, MB-4 0.2%, 168 / 1010 0.4%.

[0047] (2) Add the above-mentioned alumina, boron nitride, and flake graphite into a high-speed mixer, then add a silane coupling agent and mix evenly for later use.

[0048] (3) Add the above uniformly mixed thermally conductive filler together with PA6, processing aids and compatibilizers into a high-speed mixer, mix evenly, and then add them to the main feeding barrel of the twin-screw extruder.

[0049] (4) The above materials are extruded and granulated by a twin-screw extruder to obtain a primary granulated material. The frequency of the twin-screw host is 40Hz, the feeding frequency is 9Hz, and the temperature is 235°C.

[0050] (5) The primary granulated material is added to the main feeding barrel of the single-screw extruder, extruded...

Embodiment 3

[0052] (1) Weigh raw materials according to weight ratio: PA6: 40%, 50μm magnesium oxide 20%, 5μm magnesium oxide 10%, 50μm expanded graphite 10%, carbon fiber 15%, compatibilizer CMG9805 3.5%, silane coupling agent 1.5% , MB-4 0.2%, 168 / 1010 0.4%.

[0053] (2) Add the above-mentioned magnesium oxide and expanded graphite into the high-speed mixer, then add the silane coupling agent and mix evenly for later use.

[0054] (3) Add the above uniformly mixed thermally conductive filler together with PA6, processing aids and compatibilizers into a high-speed mixer, mix evenly, and then add them to the main feeding barrel of the twin-screw extruder.

[0055] (4) The above materials are extruded and granulated by a twin-screw extruder to obtain a primary granulated material. The frequency of the twin-screw host is 40Hz, the feeding frequency is 10Hz, and the temperature is 235°C.

[0056] (5) The primary granulated material is added to the main feeding barrel of the single-screw ext...

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Abstract

The invention relates to a heat-conducting, wear-resistant and insulated nylon 6 composite material and a preparation method thereof. The material is composed of the following raw materials in percentage by weight: 20-50% of PA 6, 10-30% of fibrous heat-conducting fillers, 15-30% of insulated heat-conducting powder A, 5-10% of insulated heat-conducting powder B, 5-15% of heat-conducting wear-resistant powder, 0.75-1.5% of coupling agent, 3-10% of compatibilizer, 0.2-0.5% of antioxidant and 0.2-0.5% of lubricant. According to the heat-conducting, wear-resistant and insulated nylon 6 composite material provided by the invention, heat-conducting fillers with different particle sizes, different shapes and different draw ratios are compounded so that the fillers are more uniformly distributed in a plastic matrix so as to form a heat-conducting network more easily. Since a low-feeding high-shearing extrusion process is used in the invention, an extruder is at a hungry state to achieve an effect of dispersing the fillers more uniformly. When the fibrous heat conducting fillers are added, a single screw extruder is used, so that the fibers can be sheared into smaller size, the damage is smaller, and meanwhile, the fillers are dispersed more uniformly by extruding the fillers by the extruder for the second time; and the heat-conducting, wear-resistant and insulated nylon 6 composite material provided by the invention has the advantages of good heat conducting effect, excellent wear resistance, easy workability, etc.

Description

technical field [0001] The invention relates to a heat-conducting, wear-resistant and insulating nylon 6 composite material and a preparation method thereof. Background technique [0002] With the rapid development of large-scale integration of circuit boards and micro-encapsulation technology, the volume of electronic components is shrinking, the assembly density is getting higher and higher, and the power is increasing, and the heat generation is also increasing. Therefore, heat dissipation has become an important issue in the electronics industry. Metals, ceramics, and carbon materials with excellent thermal conductivity have been difficult to meet the needs of the modern electronics industry due to limitations in electrical insulation or poor processing and forming performance. Nylon 6 has superior comprehensive properties, including mechanical strength, stiffness, toughness, mechanical shock absorption and wear resistance. These characteristics, coupled with good elect...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K13/04C08K7/06C08K3/04C08K3/34C08K3/22C08K3/38C08K5/13C08K5/524
CPCB29B9/06C08K2201/003C08L77/02C08L51/06C08K9/06C08K2003/222C08K2003/2227C08K3/04C08K7/06C08K2003/385C08K7/24C08K3/34
Inventor 刘引烽周海堤赵凯凯房嫄杨小瑞李琛骏邵红娟王尹杰孟成铭陈晓东
Owner SHANGHAI UNIV
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