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Nylon 6 complex and preparation thereof
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A composite and nylon technology, applied in the field of plastic composites, can solve problems such as increasing secondary crystallization, and achieve the effect of increasing the crystallization rate and improving the dispersion state.
Inactive Publication Date: 2011-04-27
CHINA NAT BLUESTAR (GRP) CO LTD
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However, the addition of silica will increase secondary crystallization and require heat treatment of the product
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Embodiment 1
[0030] (1) Premixing: 981g density of 1.2g / cm 3 And relative viscosity is the nylon 6 of 2.50, and 5g particle size is the aluminum-magnesium hydrotalcite of 0.1~0.2 micron, the polyethylene elastomer of 10g maleic anhydride (MAH) grafting, graft ratio 0.5wt%, 2g primary antioxidant Add IRGANOX1076 and 2g of co-antioxidant IRGAFOS168 into a high-speed mixer, and mix for 3 minutes at a temperature of 25°C and a rotation speed of 200 rpm to form a mixture.
[0031] (2) Extrusion granulation: Add the mixed materials in step (1) into the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 220-230 °C, and the screw speed to 300 rpm. Machine rotating speed is 30 rev / mins, obtains nylon 6 compound product. Its product properties are shown in Table 1.
Embodiment 2
[0033] (1) Premix: 969g density is 1.1g / cm 3 And the nylon 6 that relative viscosity is 2.30, 6g particle size is the aluminum-magnesium hydrotalcite of 0.05~0.1 micron, the polyethylene elastomer of 15g maleic anhydride (MAH) grafting, graft ratio 0.3wt%, 5g primary antioxidant Add IRGANOX1010 and 5g of co-antioxidant IRGAFOS168 into a high-speed mixer, and mix for 4 minutes at a temperature of 20°C and a speed of 600 rpm to form a mixture.
[0034] (2) Extrusion granulation: Add the materials mixed in step (1) into the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 200-220 °C, and the screw speed to 450 rpm. Machine rotating speed is 50 rev / mins, obtains nylon 6 compound product. Its product properties are shown in Table 1.
Embodiment 3
[0036] (1) Premix: 992g density is 1.3g / cm 3 And the nylon 6 that relative viscosity is 3.50, 1g particle size is the aluminum-magnesium hydrotalcite of 0.3~0.5 micron, the polyethylene elastomer of 5g maleic anhydride (MAH) grafting, grafting rate 0.8wt%, 1g primary antioxidant IRGANOX1076 and 1g of secondary antioxidant IRGAFOS168 were added into a high-speed mixer, and mixed for 6 minutes at a temperature of 35° C. and a rotation speed of 100 rpm to form a mixture.
[0037] (2) Extrusion granulation: Add the mixed materials in step (1) into the parallel twin-screw extruder rotating in the same direction, control the extrusion temperature of each section to 220-240 °C, and the screw speed to 100 rpm. Machine rotating speed is 10 rev / mins, obtains nylon 6 compound product. Its product properties are shown in Table 1.
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Abstract
The invention discloses a compound of nylon 6 which includes the following components: 99.2 to 96.9 percent of nylon 6, 0.1 to 0.6 percent of houghite, 0.5 to 1.5 percent of dispersant, 0.1 to 0.5 percent of primary antioxidant as well as 0.1 to 0.5 percent of assistant antioxidant. The invention also discloses a preparation method of the compound which includes a: premixing: the nylon 6, the houghite, the dispersant, the primary antioxidant and the assistant antioxidant are added into a high speed mixing machine for mixing; the mixing temperature is between 20 and 50 DEG C; the rotation speed of the mixing machine is 100 to 800r / min and the mixing time is between 1 and 6 minutes; b extruding and pelleting; the materials pre-mixed in the step a are added into a double screw extruder to carry out extruding and pelleting; the temperature of each section of the double screw extruder during extruding are between 200 and 260 DEG C; the rotation speed of the screw is 100 to 500r / m; the rotation speed of a material feeder is 10 to 60r / m. The compound can remarkably improve the crystalline rate, the crystalline temperature and the crystallinity of the nylon 6 in the compound.
Description
technical field [0001] The invention relates to a plastic compound, in particular to a nylon 6 compound, and also relates to a preparation method of the nylon 6 compound. Background technique [0002] Nylon 6 (PA6, polycaprolactam) is an engineering plastic with high strength, high impact toughness, high heat resistance, high barrier property and high wear resistance. In order to further improve its strength, rigidity, heat resistance, and reduce production costs, it is often necessary to fill nylon 6 with inorganic rigid particles such as calcium carbonate, talcum powder, and glass microspheres, or to add fiber fillers with a large aspect ratio such as glass fibers and potassium titanate whiskers. The addition of inorganic rigid components transforms nylon 6 into a multiphase system, and the crystal structure of nylon 6 also changes due to the presence of other components, thus affecting the properties of the final product. [0003] Theoretical studies have shown that pol...
Claims
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