CN113527874A - PA6-PA66 composite material - Google Patents

PA6-PA66 composite material Download PDF

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CN113527874A
CN113527874A CN202110908653.XA CN202110908653A CN113527874A CN 113527874 A CN113527874 A CN 113527874A CN 202110908653 A CN202110908653 A CN 202110908653A CN 113527874 A CN113527874 A CN 113527874A
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composite material
zone
temperature
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林镇彬
黄国庆
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Dongguan Jinxite Polymer Material Industry Co ltd
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Dongguan Jinxite Polymer Material Industry Co ltd
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Abstract

The invention relates to the field of materials, in particular to a PA6-PA66 composite material which is prepared from the following raw materials in percentage by weight: PA 64-75%; PA 664-75%; 8-25% of a flame retardant; 5-20% of a reinforcing material; 1-3% of a compatilizer; 0.1 to 1 percent of antioxidant; 0.1 to 1.5 percent of lubricant. The PA6-PA66 composite material ensures that the material has high strength, high heat resistance and high fluidity, and also has the characteristics of high surface brightness, excellent dimensional stability of products, low warpage and the like; the appearance is good, the surface is bright, and the high-fluidity and easy-injection-molding characteristics are realized; the preparation method is simple in preparation process, easy to operate and free of complex equipment.

Description

PA6-PA66 composite material
Technical Field
The invention relates to the field of materials, in particular to a PA6-PA66 composite material.
Background
PA66 (nylon 66) resin and PA66 (nylon 6) resin are one of engineering plastics widely used, and PA66 and PA6 belong to crystalline materials, have good fluidity, are resistant to organic solvents, have good compatibility with glass fibers, but are easy to absorb water, have poor dimensional stability and heat resistance, have poor surface glossiness after being reinforced by the glass fibers, and particularly have insufficient dimensional stability and poor fluidity for large parts.
The reinforced filling PA66/PA6 alloy sold in the market is mostly common reinforced filling PA66/PA6 alloy, has a common surface, a common warping resistance, low heat resistance and mechanical strength and poor flowability, and is difficult to inject. At present, the heat resistance and strength problems are mainly solved by adopting a high-content glass fiber reinforced PA66/PA6 alloy, after the high-content glass fiber reinforced PA66/PA6 alloy, the heat resistance and mechanical strength of the material are greatly improved, but the appearance and dimensional stability of the material are greatly reduced, a molded part is seriously warped and deformed, the appearance and assembly of the part are influenced, and the part with high brightness cannot meet the requirements at all for some parts with high requirements.
Disclosure of Invention
In order to solve the technical problems, the invention provides a PA6-PA66 composite material with high strength and high heat resistance.
The invention adopts the following technical scheme:
a PA6-PA66 composite material is composed of the following raw materials in percentage by weight:
Figure BDA0003202677410000011
Figure BDA0003202677410000021
the technical proposal is further improved in that the intrinsic viscosity of the PA6 is 3 dl/g.
The technical proposal is further improved in that the intrinsic viscosity of the PA66 is 3 dl/g.
The technical proposal is further improved that the flame retardant comprises the following components in parts by weight: 10-15 parts of ammonium polyphosphate, 10-15 parts of modified expanded graphite, 3-6 parts of antimony trioxide and 1-3 parts of pentaerythritol phosphate.
The technical proposal is further improved in that the reinforcing material is at least one of glass fiber, glass microballoon, carbon fiber, magnesium carbonate, barium sulfate and nano montmorillonite.
The technical proposal is further improved in that the compatilizer is at least one of methacrylate-based copolymer, vinyl acetate-based copolymer and glycolic acid-based copolymer.
The technical proposal is further improved in that the antioxidant is one of phenol antioxidant or phosphite antioxidant.
In a further improvement of the above technical solution, the lubricant is at least one of a long-chain fatty acid, a long-chain fatty acid salt, a long-chain fatty acid ester, or an amide derivative.
The technical scheme is further improved in that the preparation method of the PA6-PA66 composite material comprises the following steps: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
The further improvement of the technical scheme is that the temperature of the first zone of the double-screw extruder is 210-minus 245 ℃, the temperature of the second zone is 260-minus 275 ℃, the temperature of the third zone is 260-minus 275 ℃, the temperature of the fourth zone is 265-minus 275 ℃, the temperature of the fifth zone is 250-minus 270 ℃, the temperature of the sixth zone is 250-minus 270 ℃, the temperature of the seventh zone is 250-minus 270 ℃, the temperature of the eighth zone is 250-minus 270 ℃, the temperature of the ninth zone is 260-minus 275 ℃, the temperature of the head is 260-minus 280 ℃, the retention time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
The invention has the beneficial effects that:
the PA6-PA66 composite material ensures that the material has high strength, high heat resistance and high fluidity, and also has the characteristics of high surface brightness, excellent dimensional stability of products, low warpage and the like; the appearance is good, the surface is bright, and the high-fluidity and easy-injection-molding characteristics are realized; the preparation method is simple in preparation process, easy to operate and free of complex equipment.
Detailed Description
The present invention will be further described with reference to the following examples for better understanding of the present invention, but the embodiments of the present invention are not limited thereto.
A PA6-PA66 composite material is composed of the following raw materials in percentage by weight:
Figure BDA0003202677410000031
further, the intrinsic viscosity of the PA6 was 3 dl/g.
Further, the intrinsic viscosity of the PA66 was 3 dl/g.
Further, the flame retardant comprises the following components in parts by weight: 10-15 parts of ammonium polyphosphate, 10-15 parts of modified expanded graphite, 3-6 parts of antimony trioxide and 1-3 parts of pentaerythritol phosphate.
Further, the reinforcing material is at least one of glass fiber, glass beads, carbon fiber, magnesium carbonate, barium sulfate and nano montmorillonite.
Further, the compatilizer is at least one of a methacrylate-based copolymer, a vinyl acetate-based copolymer and a glycolic acid-based copolymer.
Further, the antioxidant is one of a phenol antioxidant or a phosphite antioxidant.
Further, the lubricant is at least one of a derivative of a long-chain fatty acid, a long-chain fatty acid salt, a long-chain fatty acid ester, or an amide.
Further, the preparation method of the PA6-PA66 composite material comprises the following steps: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
Further, the temperature of the first zone of the double-screw extruder is 210-245 ℃, the temperature of the second zone is 260-275 ℃, the temperature of the third zone is 260-275 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 250-270 ℃, the temperature of the sixth zone is 250-270 ℃, the temperature of the seventh zone is 250-270 ℃, the temperature of the eighth zone is 250-270 ℃, the temperature of the ninth zone is 260-275 ℃, the temperature of the head is 260-280 ℃, the retention time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
Example 1
A PA6-PA66 composite material is composed of the following raw materials in percentage by weight: PA 645%; PA 6629%; 8% of a flame retardant; 15% of a reinforcing material; 1% of a compatilizer; 0.5 percent of antioxidant; 1.5 percent of lubricant.
The intrinsic viscosity of the PA6 is 3 dl/g; the intrinsic viscosity of the PA66 was 3 dl/g.
The flame retardant comprises the following components in parts by weight: 10 parts of ammonium polyphosphate, 10 parts of modified expanded graphite, 3 parts of antimony trioxide and 1 part of pentaerythritol phosphate.
The reinforcing material is glass fiber.
The compatilizer is a methacrylate-based copolymer.
The antioxidant is a phenol antioxidant.
The lubricant is a long chain fatty acid.
The preparation method of the PA6-PA66 composite material comprises the following steps: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
The temperature of the first zone of the double-screw extruder is 210-245 ℃, the temperature of the second zone is 260-275 ℃, the temperature of the third zone is 260-275 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 250-270 ℃, the temperature of the sixth zone is 250-270 ℃, the temperature of the seventh zone is 250-270 ℃, the temperature of the eighth zone is 250-270 ℃, the temperature of the ninth zone is 260-275 ℃, the temperature of the head is 260-280 ℃, the retention time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
Example 2
A PA6-PA66 composite material is composed of the following raw materials in percentage by weight: PA 650%; PA 6620%; 15% of flame retardant; 12% of a reinforcing material; 1.5% of a compatilizer; 1% of antioxidant; 0.5 percent of lubricant.
The intrinsic viscosity of the PA6 is 3 dl/g; the intrinsic viscosity of the PA66 was 3 dl/g.
The flame retardant comprises the following components in parts by weight: 12 parts of ammonium polyphosphate, 10 parts of modified expanded graphite, 5 parts of antimony trioxide and 1 part of pentaerythritol phosphate.
The reinforcing material is glass beads.
The compatilizer is a methacrylate-based copolymer.
The antioxidant is phosphite ester antioxidant.
The lubricant is long-chain fatty acid salt.
The preparation method of the PA6-PA66 composite material comprises the following steps: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
The temperature of the first zone of the double-screw extruder is 210-245 ℃, the temperature of the second zone is 260-275 ℃, the temperature of the third zone is 260-275 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 250-270 ℃, the temperature of the sixth zone is 250-270 ℃, the temperature of the seventh zone is 250-270 ℃, the temperature of the eighth zone is 250-270 ℃, the temperature of the ninth zone is 260-275 ℃, the temperature of the head is 260-280 ℃, the retention time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
Example 3
A PA6-PA66 composite material is composed of the following raw materials in percentage by weight: PA 670%; PA 6610%; 10% of flame retardant; 6% of a reinforcing material; 3% of a compatilizer; 0.5 percent of antioxidant; 0.5 percent of lubricant.
The intrinsic viscosity of the PA6 is 3 dl/g; the intrinsic viscosity of the PA66 was 3 dl/g.
The flame retardant comprises the following components in parts by weight: 10 parts of ammonium polyphosphate, 10 parts of modified expanded graphite, 3 parts of antimony trioxide and 1 part of pentaerythritol phosphate.
The reinforcing material is carbon fiber.
The compatilizer is a glycolic acid-based copolymer.
The antioxidant is a phenol antioxidant.
The lubricant is long-chain fatty acid ester.
The preparation method of the PA6-PA66 composite material comprises the following steps: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
The temperature of the first zone of the double-screw extruder is 210-245 ℃, the temperature of the second zone is 260-275 ℃, the temperature of the third zone is 260-275 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 250-270 ℃, the temperature of the sixth zone is 250-270 ℃, the temperature of the seventh zone is 250-270 ℃, the temperature of the eighth zone is 250-270 ℃, the temperature of the ninth zone is 260-275 ℃, the temperature of the head is 260-280 ℃, the retention time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
Example 4
A PA6-PA66 composite material is composed of the following raw materials in percentage by weight: PA 65%; PA 6675%; 8% of a flame retardant; 10% of a reinforcing material; 1% of a compatilizer; 0.5 percent of antioxidant; 0.5 percent of lubricant.
The intrinsic viscosity of the PA6 is 3 dl/g; the intrinsic viscosity of the PA66 was 3 dl/g.
The flame retardant comprises the following components in parts by weight: 15 parts of ammonium polyphosphate, 15 parts of modified expanded graphite, 6 parts of antimony trioxide and 3 parts of pentaerythritol phosphate.
The reinforcing material is glass fiber.
The compatilizer is a methacrylate-based copolymer.
The antioxidant is a phenol antioxidant.
The lubricant is a long chain fatty acid.
The preparation method of the PA6-PA66 composite material comprises the following steps: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
The temperature of the first zone of the double-screw extruder is 210-245 ℃, the temperature of the second zone is 260-275 ℃, the temperature of the third zone is 260-275 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 250-270 ℃, the temperature of the sixth zone is 250-270 ℃, the temperature of the seventh zone is 250-270 ℃, the temperature of the eighth zone is 250-270 ℃, the temperature of the ninth zone is 260-275 ℃, the temperature of the head is 260-280 ℃, the retention time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
Comparative example 1
The prior PA6-PA66 composite material.
Performance testing
The PA6-PA66 composite samples from examples 1-4 and comparative example 1 were compared for performance testing using ASTM standards. The test performance is compared as shown in the following table:
Figure BDA0003202677410000061
Figure BDA0003202677410000071
from the above test data it can be seen that: the A66-PA6 alloy prepared by the invention has greatly improved mechanical property indexes such as tensile strength, bending modulus, impact strength and the like; the appearance is good, the surface is bright, and the high-fluidity and easy-injection-molding characteristics are realized; the formed product has low warping degree and good appearance, and is beneficial to assembly and post-processing; the high-voltage switch can be widely applied to products in the fields of electronic appliances such as contactors, leakage protectors, breaker shells and the like.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. The PA6-PA66 composite material is characterized by comprising the following raw materials in percentage by weight:
Figure FDA0003202677400000011
2. the PA6-PA66 composite material of claim 1, wherein the PA6 has an intrinsic viscosity of 3 dl/g.
3. The PA6-PA66 composite material of claim 1, wherein the PA66 has an intrinsic viscosity of 3 dl/g.
4. The PA6-PA66 composite material as claimed in claim 1, wherein the flame retardant comprises the following components in parts by weight: 10-15 parts of ammonium polyphosphate, 10-15 parts of modified expanded graphite, 3-6 parts of antimony trioxide and 1-3 parts of pentaerythritol phosphate.
5. The PA6-PA66 composite material of claim 1, wherein the reinforcing material is at least one of glass fibers, glass microspheres, carbon fibers, magnesium carbonate, barium sulfate, and nano-montmorillonite.
6. The PA6-PA66 composite material of claim 1, wherein the compatibilizer is at least one of a methacrylate-based copolymer, a vinyl acetate-based copolymer, and a glycolic acid-based copolymer.
7. The PA6-PA66 composite material of claim 1, wherein the antioxidant is one of a phenolic antioxidant or a phosphite antioxidant.
8. The PA6-PA66 composite material of claim 1, wherein the lubricant is at least one of a derivative of a long chain fatty acid, a long chain fatty acid salt, a long chain fatty acid ester, or an amide.
9. The PA6-PA66 composite material of claim 1, wherein the PA6-PA66 composite material is prepared by a method comprising the steps of: putting the components in a high-speed mixer according to the weight percentage, mixing for 6-8 minutes, discharging, adding into a double-screw extruder, and performing melt extrusion and granulation.
10. The PA6-PA66 composite material as claimed in claim 9, wherein the first zone temperature of the twin-screw extruder is 210-245 ℃, the second zone temperature is 260-275 ℃, the third zone temperature is 260-275 ℃, the fourth zone temperature is 265-275 ℃, the fifth zone temperature is 250-270 ℃, the sixth zone temperature is 250-270 ℃, the seventh zone temperature is 250-270 ℃, the eighth zone temperature is 250-270 ℃, the ninth zone temperature is 260-275 ℃, the head temperature is 260-280 ℃, the residence time of each zone is 3.5-4min, and the vacuum pressure of each zone is-0.07-0.15 MPa.
CN202110908653.XA 2021-08-09 2021-08-09 PA6-PA66 composite material Pending CN113527874A (en)

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