High-transparency, low-temperature cracking-resistant nylon composite material and preparation method thereof

Abstract

The invention relates to a nylon composite material with high transparency and low temperature cracking resistance and a preparation method thereof. The composite material comprises the following components in parts by weight: 53-99 parts of nylon, 1-47 parts of polar liquid rubber toughening agent, 0.2-1 part of nucleating agent, 0.2-0.5 part of lubricant and 0.2-0.5 part of antioxidant; the preparation method comprises the following steps: uniformly mixing the nylon with the polar liquid rubber toughening agent in the formula in advance, adding other additives in the premix for co-mixing, adding the mixture into a double-screw extruder, and extruding to prepare the nylon composite material with high transparency and low temperature cracking resistance. Compared with the prior art, the product provided by the invention has the advantages of wide material selection, excellent low temperature cracking resistance, high rigidity retaining rate, good transparency, excellent appearance and the like, and is particularly suitable for application in some products with higher requirements on the low temperature cracking resistance and appearance transparency of materials, for example, spectacles, buckles, ribbons, etc.

Description

technical field

[0001] The invention relates to a nylon composite material and a preparation method thereof, in particular to a high-transparency, low-temperature cracking-resistant nylon composite material and a preparation method thereof. Background technique

[0002] Nylon is one of the most important varieties of engineering plastics. Its output ranks first among the five major engineering plastics. It has excellent mechanical strength, fatigue resistance, self-lubrication and heat resistance. It is widely used in the fields of automobiles, electrical equipment, mechanical parts, transportation equipment, textiles and papermaking. Unmodified nylon parts often have a lot of internal stress in the matrix due to cooling too fast and not being able to crystallize naturally during the injection molding process. In a low temperature environment, the polymer chains in the material cannot effectively transmit / diffuse the internal stress and external destructive force due to the...

Examples

Embodiment 1

[0038] The preparation method of high-transparency, low-temperature cracking-resistant nylon composite material comprises the following steps:

[0039] Step 1, prepare raw materials according to the following parts by weight:

[0040]

[0041] Step 2, place the nylon in a blast drying oven, and dry it at 110°C for 3 hours;

[0042] Step 3, adding the polar liquid rubber and nylon into the high-mixer and blending for 10 minutes to obtain a uniform premix;

[0043] Step 4, adding nucleating agent, lubricant and antioxidant to the premixed material in the high mixer, and blending for 20 minutes to obtain the formula material;

[0044] Step 5: Add the formula obtained in Step 4 into a twin-screw extruder for extrusion and granulation. The main engine speed of the extruder is 40Hz, the feeding speed is 12.5Hz, and the temperature of the barrel is set at 240-255°C.

Embodiment 2

[0046] The preparation method of high-transparency, low-temperature cracking-resistant nylon composite material comprises the following steps:

[0047] Step 1, prepare raw materials according to the following parts by weight:

[0048]

[0049] Step 2, place the nylon in a blast drying oven, and dry it at 110°C for 5 hours;

[0050] Step 3, adding the polar liquid rubber and nylon into the high-mixer and blending for 20 minutes to obtain a uniform premix;

[0051] Step 4, adding nucleating agent, lubricant and antioxidant to the premixed material in the high mixer, and blending for 30 minutes to obtain the formula material;

[0052] Step 5: Add the formula obtained in Step 4 into a twin-screw extruder for extrusion and granulation. The speed of the extruder host is 35 Hz, the feeding speed is 14 Hz, and the temperature of the barrel is set at 230-250 ° C.

Embodiment 3

[0054] The preparation method of high-transparency, low-temperature cracking-resistant nylon composite material comprises the following steps:

[0055] Step 1, prepare raw materials according to the following parts by weight:

[0056]

[0057] Step 2, place the nylon in a blast drying oven, and dry it at 100°C for 3 hours;

[0058] Step 3, adding the polar liquid rubber and nylon into the high-mixer and blending for 15 minutes to obtain a uniform premix;

[0059] Step 4, adding nucleating agent, lubricant and antioxidant to the premixed material in the high mixer, and blending for 30 minutes to obtain the formula material;

[0060] Step 5: Put the formulation obtained in Step 4 into a twin-screw extruder for extrusion and granulation. The main engine speed of the extruder is 35Hz, the feeding speed is 12.5Hz, and the barrel temperature is set at 210-225°C.

technical field

[0001] The invention relates to a nylon composite material and a preparation method thereof, in particular to a high-transparency, low-temperature cracking-resistant nylon composite material and a preparation method thereof. Background technique

[0002] Nylon is one of the most important varieties of engineering plastics. Its output ranks first among the five major engineering plastics. It has excellent mechanical strength, fatigue resistance, self-lubrication and heat resistance. It is widely used in the fields of automobiles, electrical equipment, mechanical parts, transportation equipment, textiles and papermaking. Unmodified nylon parts often have a lot of internal stress in the matrix due to cooling too fast and not being able to crystallize naturally during the injection molding process. In a low temperature environment, the polymer chains in the material cannot effectively transmit / diffuse the internal stress and external destructive force due to the...

Examples

Embodiment 1

[0038] The preparation method of high-transparency, low-temperature cracking-resistant nylon composite material comprises the following steps:

[0039] Step 1, prepare raw materials according to the following parts by weight:

[0040]

[0041] Step 2, place the nylon in a blast drying oven, and dry it at 110°C for 3 hours;

[0042] Step 3, adding the polar liquid rubber and nylon into the high-mixer and blending for 10 minutes to obtain a uniform premix;

[0043] Step 4, adding nucleating agent, lubricant and antioxidant to the premixed material in the high mixer, and blending for 20 minutes to obtain the formula material;

[0044] Step 5: Add the formula obtained in Step 4 into a twin-screw extruder for extrusion and granulation. The main engine speed of the extruder is 40Hz, the feeding speed is 12.5Hz, and the temperature of the barrel is set at 240-255°C.

Embodiment 2

[0046] The preparation method of high-transparency, low-temperature cracking-resistant nylon composite material comprises the following steps:

[0047] Step 1, prepare raw materials according to the following parts by weight:

[0048]

[0049] Step 2, place the nylon in a blast drying oven, and dry it at 110°C for 5 hours;

[0050] Step 3, adding the polar liquid rubber and nylon into the high-mixer and blending for 20 minutes to obtain a uniform premix;

[0051] Step 4, adding nucleating agent, lubricant and antioxidant to the premixed material in the high mixer, and blending for 30 minutes to obtain the formula material;

[0052] Step 5: Add the formula obtained in Step 4 into a twin-screw extruder for extrusion and granulation. The speed of the extruder host is 35 Hz, the feeding speed is 14 Hz, and the temperature of the barrel is set at 230-250 ° C.

Embodiment 3

[0054] The preparation method of high-transparency, low-temperature cracking-resistant nylon composite material comprises the following steps:

[0055] Step 1, prepare raw materials according to the following parts by weight:

[0056]

[0057] Step 2, place the nylon in a blast drying oven, and dry it at 100°C for 3 hours;

[0058] Step 3, adding the polar liquid rubber and nylon into the high-mixer and blending for 15 minutes to obtain a uniform premix;

[0059] Step 4, adding nucleating agent, lubricant and antioxidant to the premixed material in the high mixer, and blending for 30 minutes to obtain the formula material;

[0060] Step 5: Put the formulation obtained in Step 4 into a twin-screw extruder for extrusion and granulation. The main engine speed of the extruder is 35Hz, the feeding speed is 12.5Hz, and the barrel temperature is set at 210-225°C.

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