High-surface glossiness and high-dimensional stability polyamide composite material and preparation method thereof

A composite material and polyamide technology, which is applied in the field of polyamide composite materials with high surface gloss and high dimensional stability and its preparation, can solve the problems of less research on dimensional stability, reduced mechanical properties, poor dimensional stability, etc., to achieve Excellent chemical resistance, maintaining dimensional stability, and high dimensional stability

Inactive Publication Date: 2017-05-31
江苏沃特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, because polyamide contains amine groups and carbonyl groups, it is easy to form hydrogen bonds with water molecules, so the various materials obtained are easy to absorb water when used, resulting in a plasticizing effect, resulting in volume expansion of the material, a decrease in modulus, and instability in the size of the material.
The poor creep resistance of the material reduces the mechanical properties and poor dimensional stability, which limits the application of the material to a large extent, especially in fields with high mechanical properties and dimensional stability requirements in high-temperature and high-humidity environments. application
At the same time, the surface gloss of glass fiber reinforced polyamide materials is low, and most of them can only be used as structural parts at present. When they are used as exterior parts, they need to be sprayed, which is costly and pollutes the environment to a certain extent.
At present, the floating fibers on the surface of glass fiber reinforced polyamide mater

Method used

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  • High-surface glossiness and high-dimensional stability polyamide composite material and preparation method thereof
  • High-surface glossiness and high-dimensional stability polyamide composite material and preparation method thereof
  • High-surface glossiness and high-dimensional stability polyamide composite material and preparation method thereof

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preparation example Construction

[0045] The preparation method of polyamide of the present invention comprises the following steps:

[0046] (1) uniformly mixing polyamide, semi-aromatic polyamide, antioxidant, heat-resistant agent, lubricant, and fluidity improver to prepare a mixed material;

[0047] (2) Spray the coupling agent in the filler and mix evenly to obtain the mixed material;

[0048] (3) Add the material obtained in step (1), the material obtained in step (2) and glass fiber from different material ports, melt extrude, and granulate to obtain the polyamide composite material.

[0049] Preferably, the mixing in step (1) is carried out in a high-speed mixer, and the mixing time is 1 to 5 minutes.

[0050] The specific implementation of step (2) is as follows: add the filler into a high-speed mixer at a temperature of 75 ° C, then add the coupling agent to the filler in a spraying manner, and mix for 10 to 20 minutes to ensure coupling The agent is evenly coated on the filler surface.

[0051] T...

Embodiment 1

[0055] The polyamide composite material is made of the raw materials of the following weight fractions: PA66 is 71.6 parts, polyhexamethylene isophthalamide is 5 parts, silane coupling agent is 0.1 part, antioxidant is 0.2 part, heat-resistant agent 0.5 parts, 0.3 parts lubricant, 0.3 parts fluidity improver, 30 parts glass fiber, 2 parts mica; the manufacturing process is: the temperature of the first zone is 180°C, the temperature of the second zone is 220°C, the temperature of the third zone is 230°C, The temperature in the fourth zone is 240°C, the temperature in the fifth zone is 240°C, the temperature in the sixth zone is 240°C, the temperature in the seventh zone is 230°C, the temperature in the eighth zone is 220°C, and the temperature in the ninth zone is 240°C.

Embodiment 2

[0057] The polyamide composite material is made of the following raw materials in weight fractions: PA66 is 56.5 parts, polyhexamethylene isophthalamide is 10 parts, silane coupling agent is 0.1 part, antioxidant is 0.2 part, heat-resistant agent 0.5 parts, 0.3 parts lubricant, 0.3 parts fluidity improver, 30 parts glass fiber, 2 parts mica; the manufacturing process is: the temperature of the first zone is 180°C, the temperature of the second zone is 220°C, the temperature of the third zone is 230°C, The temperature in the fourth zone is 250°C, the temperature in the fifth zone is 250°C, the temperature in the sixth zone is 220°C, the temperature in the seventh zone is 210°C, the temperature in the eighth zone is 200°C, and the temperature in the ninth zone is 250°C.

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Abstract

The invention belongs to the technical field of polymeric composite materials, and particularly relates to a high-surface glossiness and high-dimensional stability polyamide composite material and a preparation method thereof. In parts by weight, the polyamide composite material is prepared from the following components: 30 to 90 parts of polyamide; 5 to 15 parts of semi-aromatic polyamide; 0.1 to 1.0 part of coupling agent; 0.1 to 1.0 part of antioxidant; 0 to 1.0 part of heat-resistant agent; 0.1 to 2.0 parts of lubricating agent; 0.1 to 1.0 part of fluidity-improving agent; 20 to 50 parts of glass fibers; and 0 to 10 parts of filler. The polyamide composite material disclosed by the invention has high glossiness, high fluidity, chemical resistance and good mechanical properties; moreover, after moisture is absorbed, the decrease of the physical properties of the material is little, the dimensional stability is high, wear and abrasion can be resisted, heat resistance is good, and the processability is good.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a polyamide composite material with high surface gloss and high dimensional stability and a preparation method thereof. Background technique [0002] Polyamide resin has good mechanical properties, chemical resistance, wear resistance, heat resistance and other excellent properties, and has been widely used in automobiles, aerospace, chemical industry, machinery, electronic appliances, sports equipment and other fields. Due to the linear asymmetric molecular structure of traditional polyamide, the molecular chain is in a winding state, so the crystallinity of the material is relatively low, generally only 25%-45%. Due to the existence of hydrogen, oxygen and nitrogen atoms in the polyamide molecules, hydrogen bonds are easily formed between the molecules, resulting in a strong intermolecular force, which makes the material have high strength and hi...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/00C08K13/06C08K9/06C08K7/14C08K3/34B29C47/92B29C48/92
CPCC08L77/06B29C48/92B29C2948/92704C08L2201/08C08L2203/20C08L2205/025C08L2205/03C08L77/00C08K13/06C08K9/06C08K7/14C08K3/34
Inventor 黄慧
Owner 江苏沃特新材料科技有限公司
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