Injection-molding polyamide composite material and preparation method thereof

A composite material and polyamide technology, applied in the field of materials, can solve the problems of poor appearance and warpage deformation of parts, and achieve the effect of improving the appearance and reducing the degree of warpage deformation.

Inactive Publication Date: 2014-12-24
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite materials obtained in this way can meet the requirements of most parts in terms of performance, but the appearance of injection molded parts is very poor, and warping deformation is prone to occur at the same time

Method used

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  • Injection-molding polyamide composite material and preparation method thereof
  • Injection-molding polyamide composite material and preparation method thereof
  • Injection-molding polyamide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high appearance, low warpage glass fiber reinforced polyamide composite material comprising, by weight percent:

[0030] PA6: 83.2%, chopped glass fiber: 15%, antioxidant: 1098 (0.1%), 168 (0.1%), nucleating agent: 0.1%, black mother: 1%; lubricant: 0.5%; PA6 relative The viscosity is 2.4; the chopped glass fiber is 10 μm; the nucleating agent is a low-molecular ionomer; black masterbatch, no carrier black masterbatch, the carbon content is 92%; the lubricant is silicone.

[0031] High appearance, low warpage glass fiber reinforced polyamide composites, proceed as follows:

[0032] (1) Premixing: Add PA6, antioxidant, nucleating agent, black masterbatch and lubricant into the blender according to the above ratio, and blend for 5 minutes;

[0033] (2) Pelletizing: Add the homogeneously mixed materials in step (1) into the main feeding hopper of the twin-screw extruder, add glass fiber into the side feeding hopper, control the glass fiber content, and melt and extrude ...

Embodiment 2

[0036] A high appearance, low warpage glass fiber reinforced polyamide composite material comprising, by weight percent:

[0037] PA6: 68.2%, chopped glass fiber: 30%, antioxidant: 1098 (0.1%), 168 (0.1%), nucleating agent: 0.1%, black mother: 1%; lubricant: 0.5%; PA6 relative The viscosity is 2.4; the chopped glass fiber is 10 μm; the nucleating agent is a low-molecular ionomer; black masterbatch, no carrier black masterbatch, the carbon content is 92%; the lubricant is silicone.

[0038] High appearance, low warpage glass fiber reinforced polyamide composites, proceed as follows:

[0039] (1) Premixing: Add PA6, antioxidant, nucleating agent, black masterbatch and lubricant into the blender according to the above ratio, and blend for 5 minutes;

[0040] (2) Pelletizing: Add the homogeneously mixed materials in step (1) into the main feeding hopper of the twin-screw extruder, add glass fiber into the side feeding hopper, control the glass fiber content, and melt and extrude ...

Embodiment 3

[0043] A high appearance, low warpage glass fiber reinforced polyamide composite material comprising, by weight percent:

[0044] PA6: 68.2%, chopped glass fiber: 10%, modified calcium carbonate: 20%, antioxidant: 1098 (0.1%), 168 (0.1%), nucleating agent: 0.1%, black masterbatch: 1%; Lubricant: 0.3%; relative viscosity of PA6 is 2.4; chopped glass fiber 10μm; calcium carbonate is 800 mesh; nucleating agent is low molecular ionomer; for silicone.

[0045] Preparation of modified calcium carbonate: calcium carbonate and silane coupling agent are added in the blender, and blended for 10 min at 50° C. to obtain modified calcium carbonate. The amount of silane coupling agent added is 0.5% of the weight of calcium carbonate; Apparently, low warpage glass fiber reinforced polyamide composites, proceed as follows:

[0046] (1) Premixing: Add PA6, modified calcium carbonate, antioxidant, nucleating agent, black masterbatch and lubricant into the blender according to the above ratio,...

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Abstract

The invention relates to an injection-molding polyamide composite material and a preparation method thereof, belonging to the technical field of materials. The common glass fiber used as the reinforcer of the polyamide material can improve the appearance of the product and lower the buckling deformation of the product on the basis of not influencing the mechanical properties of the product; the coupling agent, lubricant and mineral are added to enhance the binding property between the polyamide material and glass fiber and improve the dispersity of the glass fiber in the polyamide material, so that the glass fiber can not be easily exposed to the surface, and the polyamide material has a favorable surface; and the nucleating agent is added to enhance the crystallization rate and crystallization temperature, reduce the after shrinkage and lower the buckling deformation. Simulation software MOLDFLOW is utilized to evaluate the buckling deformation of the material on the part, thereby being more beneficial to material development. On the premise of reducing the consumption of the nylon resin, increasing the consumption of the cheaper mineral and glass fiber and lowering the material cost, all the properties of the material are not lowered, and especially the appearance and warpage of the injection-molding part are not lowered.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to an injection-grade polyamide composite material and a preparation method thereof, belonging to the field of material technology. Background technique [0002] In the field of automobiles, for every 100 kg reduction in vehicle curb weight, the fuel consumption per 100 kilometers can be reduced by 0.3-0.6 liters; if the weight of the vehicle is reduced by 1%, the fuel consumption can be reduced by 0.7%. Due to the needs of environmental protection and energy saving, the lightweight of automobiles has become the trend of the development of automobiles in the world. At present, the most important lightweight measure is to use lightweight materials. The density of plastic is low, so it has become the first choice for lightweight automobiles. From the perspective of materials used in modern automobiles, whether it is exterior decoration parts, interior decoration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L83/04C08K13/04C08K7/14C08K5/526C08K3/26C08K3/34C08K7/20
CPCC08L77/02C08J3/223C08J3/226C08J2377/02C08J2477/00C08K2201/003C08L2201/08C08L2205/03C08L2205/24C08L2310/00C08L83/04C08K13/04C08K7/14C08K5/526C08K5/134C08K13/06C08K9/06C08K2003/265C08K7/20
Inventor 薛建峰周勇成二国吴汾
Owner NANJING JULONG SCI&TECH CO LTD
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