Polyamide composite material as well as preparation method and use thereof

A composite material and polyamide technology, applied in the field of polymer composite materials, can solve the problems of inability to apply peripheral accessories of automobile engines, shortened life, etc., and achieve the effect of economical and convenient processing and enhanced reinforcement

Active Publication Date: 2013-06-12
大河宝利材料科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glass fiber reinforced modified polyamide is widely used in automobile parts as a substitute for metal. In recent years, with the development of lightweight automobiles, thermally stable polyamide has replaced metal in engine peripheral parts, such as engine cover Cover, engine intake manifold, etc., because the technology of adding thermal stabilizers to improve the thermal stability of polyamide can only ensure that the long-term service temperature of polyamide is lower than 150 ° C, and the life of the material will be shortened when it exceeds 150 ° C. The operating temperature of the engine room is often higher than 160°C
However, in the existing technology of modifying by adding thermal conductive powder, it is necessary to add a coupling agent to improve the performance of the composite material, and the thermal conductive powder modified material is not reinforced by adding glass fiber, so it cannot be applied to peripheral accessories of automobile engines

Method used

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  • Polyamide composite material as well as preparation method and use thereof
  • Polyamide composite material as well as preparation method and use thereof
  • Polyamide composite material as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The formula is:

[0026]

[0027] Dry polyamide 6 in a rotary dryer at 120°C for 2 hours, and control the moisture content below 0.5%; weigh stearic acid, CuI, KI and dried polyamide 6 powder by weight percentage, place in high-speed mixing Mix in the machine at 1500 rpm for 5 minutes to obtain a polyamide 6 premix. Add the polyamide 6 premix into the extruder, set the extruder, the first section: 220°C, the second section 240°C, the third section: 240°C, the fourth section: 245°C, the fifth section : 240°C, sixth section 245°C, seventh section: 240°C, eighth section: 240°C, ninth section: 240°C, screw speed 350rpm, melt temperature 250°C; The fourth stage is force-fed from the side, and the chopped glass fiber with a length of 4mm is force-fed from the sixth stage of the extruder, and then mixed with the melt, and the strip extruded by the extruder is water-cooled, pelletized, and screened composite material is obtained.

Embodiment 2

[0029] The formula is:

[0030]

[0031] Dry polyamide 66 in a rotary dryer at 120°C for 2 hours, and control the moisture content below 0.5%; weigh stearic acid, CuI, KI and polyamide 66 powder by weight percentage, and place them in a high-speed mixer at 1500rpm Down mixing for 5 minutes yields a polyamide 66 premix. Add the polyamide 66 premix into the extruder, set the extruder, the first section: 240°C, the second section 280°C, the third section: 280°C, the fourth section: 285°C, the fifth section : 280°C, sixth stage 285°C, seventh stage: 280°C, eighth stage: 280°C, ninth stage: 280°C, screw speed 350rpm, melt temperature 310°C; Forced feeding from the side of the four sections, the chopped glass fiber with a length of 4mm is forced fed from the sixth section of the extruder, and then mixed with the melt, and the strips extruded by the extruder are water-cooled, pelletized and screened composite material is obtained.

Embodiment 3

[0033] The formula is:

[0034]

[0035] Dry polyamide 6 in a rotary dryer at 120°C for 2 hours, and control the moisture content below 0.5%; weigh stearic acid, antioxidant 1098 and polyamide 6 powder by weight percentage, and place them in a high-speed mixer Mixing at 1500 rpm for 5 minutes gave a polyamide 6 premix. Add the polyamide 6 premix into the extruder, set the extruder, the first section: 220°C, the second section 240°C, the third section: 240°C, the fourth section: 245°C, the fifth section : 240°C, the sixth stage is 245°C, the seventh stage: 240°C, the eighth stage: 240°C, the ninth stage: 240°C, the screw speed is 350rpm, the melt temperature is 250°C; Forced feeding from the side of the four sections, the chopped glass fiber with a length of 4mm is forced fed from the sixth section of the extruder, and then mixed with the melt, and the strips extruded by the extruder are water-cooled, pelletized and screened composite material is obtained.

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Abstract

The invention discloses a polyamide composite material. The polyamide composite material comprises the following components in percentage by weight: 30%-80% of polyamide, 10%-50% of glass fiber, 5%-30% of heat-conducting filler, 0.1%-2% of a heat stabilizer and 0.1%-0.5% of a lubricant. A special screw assembly design on a twin-screw extruder is adopted, so that the powder can be well dispersed without adding a coupling agent, and the comprehensive performances are still better. In the composite material, the nanometer heat conducting filler is added, so that the heat conducting performance of the composite material is improved under the condition that the mechanical performance is not reduced, the using temperature of the composite material is increased to 180 DEG C and the service life of the composite material is prolonged.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a polyamide composite material, its preparation method and application. Background technique [0002] Polyamide is a kind of engineering plastic. Polyamide is widely used in automotive components, electronic components, electrical components, etc. due to its excellent mechanical properties, thermal properties, chemical resistance, and wear resistance. Glass fiber reinforced modified polyamide is widely used in automobile parts as a substitute for metal. In recent years, with the development of lightweight automobiles, thermally stable polyamide has replaced metal in engine peripheral parts, such as engine cover Cover, engine intake manifold, etc., because the technology of adding thermal stabilizers to improve the thermal stability of polyamide can only ensure that the long-term service temperature of polyamide is lower than 150 ° C, and the life of the mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08K13/04C08K7/14C08K3/04C08K3/22B29C47/92B29C48/92
CPCB29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895
Inventor 余海峰罗煜韩越涛安小强
Owner 大河宝利材料科技(苏州)有限公司
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