Nylon 66 material and preparation method thereof

A nylon and PA66 technology, which is applied in the field of polymer materials, can solve the problems of easy flow, overflow and flash of PA66, and achieve the effect of accelerating the crystallization process, improving the flow and reducing the generation of flash.

Active Publication Date: 2021-11-02
江苏博云塑业股份有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0006] In order to solve the problems of the prior art, the embodiment of the present invention provides a new nylon 66 material to overcome the prob...
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Method used

It should be noted here that, except that the components of the nylon 66 material in the embodiment of the application include the above-mentioned ingredients, other processing aids can also be added according to actual processing requirements, to improve the performance of the nylon 66 material, not here for other There are specific restrictions on processing aids, and users can choose according to actual needs.
Specifically, usually nucleating agent can be by changing the crystallization behavior of resin, accelerates crystallization rate, increases crystallization density and impels grain size micronization, reaches shortening molding cycle, improves product transparency, surface gloss, tensile strength, Rigidity, heat distortion temperature, impact resistance, creep resistance and other physical and mechanical properties. In the implementation of the present invention, the nucleating agent and aromatic polyamide are added to the glass fiber reinforced PA66 system according to a certain proportion to be used together as a flash inhibitor. Into the mold, contact with the mold wall to cool down the nucleation speed, so that the melt solidifies rapidly, and inhibits the melt from flowing out of the mold gap. On the other hand, the nucleating agent can have a synergistic effect with the aromatic polyamide, further reducing Generation of flash edges.
[0031] As described in the background, in the prior art, PA66 easily flows into the tiny gaps of the mold during injection molding, causing problems such as flash and flash. In order to solve this problem, the present invention proposes a new nylon 66 material, by adding the first flash inhibitor to the glass fiber reinforced PA66 system (referring to adding an appropriate amount of glass fiber to the polyamide to enhance the rigidity) and the second flash suppressor, wherein the first flash suppressor can use a nucleating agent, and the second flash suppressor can use an aromatic polyamide. The nucleating agent can increase the rate of nucleation when the glass fiber reinforced PA66 melt is injected into the mold and contacts the mold wall, so that the melt can be solidified rapidly, and the melt can be inhibited from flowing out of the mold gap, thereby reducing flashing. Aromatic polyamide has a rigid benzene ring in its molecule, and its crystallization temperature is relatively high. At the same time, it has good compatibility with PA66 and can entangle with PA66 molecular cha...
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Abstract

The invention discloses a nylon 66 material and a preparation method thereof, and belongs to the technical field of high polymer materials. The nylon 66 material comprises the following components in percentage by weight: 27%-86.7% of PA66, 0.1%-1% of a first flash inhibitor, 3%-10% of a second flash inhibitor, 10%-60% of glass fibers, 0.1%-1% of an antioxidant and 0.1%-1% of a lubricant, and the second flash inhibitor is aromatic polyamide. Aromatic polyamide is used as the second flash inhibitor and can be mutually entangled with PA66 molecular chains by utilizing the characteristics that molecules of the aromatic polyamide have rigid benzene rings, the crystallization temperature is relatively high, and the compatibility with PA66 is good, so that the aromatic polyamide can flow well, can be quickly formed, and greatly inhibits the generation of flashes. Meanwhile, the first flash inhibitor and the second flash inhibitor can generate a synergistic effect to further reduce the generation of flashes.

Technology Topic

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  • Nylon 66 material and preparation method thereof
  • Nylon 66 material and preparation method thereof

Examples

  • Experimental program(29)
  • Comparison scheme(10)
  • Effect test(1)

Example Embodiment

[0056] According to the nylon 66 material, the embodiment of the present invention also provides a method of preparing a nylon 66 material, reference figure 1 As shown, the method includes the following steps:
[0057] S1: Prepare feedstocks according to the weight percentage:
[0058] PA66 27% ~ 86.7%, the first flying inhibitor 0.1% ~ 1%, the second flying inhibitor 3% ~ 10%, glass fibers 10% ~ 1%, antioxidant 0.1% ~ 1%, lubricant 0.1% ~ 1%;
[0059] S2: The above PA66, the first flying edge inhibitor, the second flying suppressant, the antioxidant, and the lubricant are mixed by the mixing machine, and the blending mixture is added to the twin-screw extruder;
[0060] S3: The glass fiber is added to the side feed, and the extruded strip is cooled through the water tank, wherein the cooling water temperature is 15 ° C to 20 ° C;
[0061] S4: Dry after granulation by the particulating machine, to obtain a nylon 66 material, wherein the particularging speed is 500 rpm to 700 rpm.
[0062] All of the above alternative techniques can be used to form an alternative embodiment of the present invention in conjunction with any combination, and will be described herein.

Example Embodiment

[0094] Example 1
[0095] One nylon 66 material, a weight percentage, which components comprise:
[0096] PA66 66.4%, PA6T / 66 (second burr inhibitor) 3%, 30% glass fiber, 0.3% antioxidant, 0.3% lubricant, wherein the sulfuric acid relative viscosity of PA66 was 2.4.

Example Embodiment

[0097] Example 2
[0098] One nylon 66 material, a weight percentage, which components comprise:
[0099] PA66 64.4%, PA6T / 66 (second burr inhibitor) 5%, 30% glass fiber, 0.3% antioxidant, 0.3% lubricant, wherein the sulfuric acid relative viscosity of PA66 was 2.4.
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Description & Claims & Application Information

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