Glass fiber reinforced nylon material as well as preparation method and application thereof

Abstract

The invention discloses a glass fiber reinforced nylon material as well as a preparation method and application thereof, and the glass fiber reinforced nylon material comprises the following components in parts by weight: 47-75 parts of polyamide, 20-40 parts of glass fiber, 3-8 parts of metasilicate polymer, 1-4 parts of aniline black master batch, 0.3-0.5 part of coupling agent and 0.5-1 part of lubricant. The glass fiber reinforced nylon material provided by the invention has excellent arc resistance, tracking resistance and mechanical properties, and can meet the application requirements of strict electrical safety performance scenes.

Description

Technical Field

[0001] This invention belongs to the field of composite material technology, specifically relating to a glass fiber reinforced nylon material, its preparation method, and its application. Background Technology

[0002] Nylon (such as PA6) is a commonly used engineering plastic. After glass fiber reinforcement modification, its mechanical strength, rigidity and heat resistance are significantly improved. It is widely used in structural parts and insulation components in the fields of electronics, electrical appliances and automotive industry. However, its tracking index (CTI value) is usually only 200-300V, which is a low CTI value material, and its application scenarios are strictly limited.

[0003] In practical applications, glass fiber reinforced nylon with low CTI values ​​is only suitable for low-pressure, clean, and dry environments. However, as industrial equipment develops towards higher voltage and integration, and the application requirements for complex working conditions such as outdoor, humid, and dusty environments increase, the drawbacks of glass fiber reinforced nylon materials with low CTI values ​​become increasingly prominent. On the one hand, in the application of medium and high voltage components (such as motor housings, circuit breakers, and high-voltage connectors), low CTI values ​​lead to insufficient insulation safety, making it easy to cause short circuits, fires, and other risks due to tracking, and failing to meet the electrical safety requirements of high-voltage scenarios. On the other hand, in humid environments (such as bathroom appliances), dusty industrial workshops, or scenarios with pollutants such as oil and salt, the anti-tracking performance of low CTI value materials deteriorates rapidly, and the risk of insulation failure increases significantly, making it difficult to adapt to complex working conditions such as outdoor and underwater environments.

[0004] Current technologies often involve adding excessive amounts of flame retardants or mineral fillers to increase the CTI value of nylon materials. However, this approach carries the risk that the CTI value may still not meet the standards, and it also increases production costs.

[0005] Therefore, it is necessary to develop a glass fiber reinforced nylon material with a high CTI value to meet application requirements. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a glass fiber reinforced nylon material, its preparation method, and its applications.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a glass fiber reinforced nylon material, which, by weight, comprises the following components:

[0009] The composition includes 47-75 parts polyamide, 20-40 parts glass fiber, 3-8 parts metasilicate polymer, 1-4 parts aniline black masterbatch, 0.3-0.5 parts coupling agent, and 0.5-1 parts lubricant.

[0010] The glass fiber reinforced nylon material provided by this invention has excellent arc resistance, anti-tracking ability and excellent mechanical properties, which can meet the application requirements of strict electrical safety performance scenarios, and is especially suitable for electrical equipment or components in environments with electric fields, moisture or pollution.

[0011] The glass fiber reinforced nylon material provided by this invention combines high electrical safety with the excellent mechanical properties of glass fiber reinforced nylon, solving the risks of short circuits or even fires caused by leakage tracking in complex environments, especially in new energy, industrial high voltage or outdoor fields. It can replace traditional phenolic resin, ordinary nylon materials or polyvinyl chloride, enabling electrical equipment to meet the requirements of higher voltage and better safety and reliability.

[0012] In this invention, the 47-75 parts of polyamide can be 47 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, etc.; the 20-40 parts of glass fiber can be 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, etc.; the 3-8 parts of metasilicate polymer can be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, etc.; the 1-4 parts of aniline black masterbatch can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, etc.; the 0.3-0.5 parts of coupling agent can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, etc.; and the 0.5-1 part of lubricant can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, etc.

[0013] Preferably, the polyamide includes any one or a combination of at least two of PA6, PA66, PA66 / 6, PA6 / 66, PA1010, PA610, PA11, or PA12.

[0014] Preferably, the molecular weight of the polyamide includes 15,000-20,000, such as 15,000, 16,000, 17,000, 18,000, 19,000, 20,000, etc.

[0015] Preferably, the glass fiber has a density of 2.4-2.5, such as 2.4, 2.41, 2.42, 2.45, 2.46, 2.48, 2.5, etc., a diameter of 1-30 μm, such as 1 μm, 2 μm, 5 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 28 μm, 30 μm, etc., and a length of 0.1-0.5 mm, such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc.

[0016] Preferably, the metasilicate polymer is selected from metasilicate polymer CZ-G20.

[0017] Preferably, the coupling agent comprises γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidyl etheroxypropyltrimethoxysilane, γ-glycidyl etheroxypropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, γ-ureapropyltriethoxysilane, N-aminoethyl-γ-aminopropyltriethoxysilane, γ-aminopropylmethyldiethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, polyaminoalkyltrialkoxysilane, anilinemethyltrimethoxysilane, tris(dioctylphosphoyl)titanate isopropyl, triisostearate isopropyl, isopropyl dioleoyloxy(dioctylphosphoyl)titanate isopropyl, and isopropyl dioleo ... The following are included in the list of tetraisopropyl tri(dioctylphosphoyloxy)titanate, isopropyl trioleoyloxytitanate, isopropyl tri(dioctylpyrophosphate)titanate, bis(dioctyloxypyrophosphate)ethylenetitanate, bis(dioctyloxypyrophosphate)ethylenetitanate and triethanolamine chelates, tetraisopropyl di(dioctylphosphite)titanate, distearate isopropyl aluminate, isopropoxydistearate aluminate, trimethyl aluminate, triisopropyl aluminate, tribenzyl aluminate, alkoxytris(vinyl-ethoxy)zirconate, alkoxytris(p-aminophenoxy)zirconate, bis(diethyl citrate)dipropoxyzirconate chelate, or tetra(triethanolamine)zirconate, or any combination of two or more of these.

[0018] Preferably, the lubricant comprises any one or a combination of at least two of the following: silane polymer, solid paraffin, liquid paraffin, fatty acid salt, calcium stearate, zinc stearate, fatty amide, methyl bis-stearamide, oleamide, stearamide, ethylene bis-stearamide, or N,N-ethylene bis-stearamide.

[0019] Preferably, the total weight of the glass fiber reinforced nylon material is 100 parts.

[0020] In a second aspect, the present invention provides a method for preparing a glass fiber reinforced nylon material as described in the first aspect, the method comprising:

[0021] The components in the formula are mixed, melt-extruded, cooled and granulated to obtain the glass fiber reinforced nylon material.

[0022] Preferably, the temperature of the melt extrusion is 220-260℃, such as 220℃, 225℃, 230℃, 235℃, 240℃, 245℃, 250℃, 255℃, 260℃, etc.

[0023] Preferably, in the preparation method, the components other than glass fiber are added from the main feed port of the screw extruder, and the glass fiber is added from the side feed port.

[0024] Preferably, the screw speed of the screw extruder is 300-600 r / min, such as 300 r / min, 350 r / min, 400 r / min, 450 r / min, 500 r / min, 550 r / min, 600 r / min, etc., and the torque is 30-50, such as 30, 35, 40, 45, 50, etc.

[0025] As a preferred embodiment of the present invention, the preparation method includes:

[0026] (1) Mix polyamide, metasilicate polymer, aniline black masterbatch, coupling agent and lubricant for 5-15 min, such as 5 min, 7 min, 8 min, 10 min, 12 min, 15 min, etc., to obtain a mixture;

[0027] (2) Add the mixture to the main feed of the screw extruder and the glass fiber to the side feed for melt extrusion. The screw extruder temperature is 220-260℃, the speed is 300-600 r / min, and the torque is 30-50.

[0028] (3) After extrusion, the material is cooled and granulated to obtain the glass fiber reinforced nylon material.

[0029] Thirdly, the present invention provides an application of the glass fiber reinforced nylon material as described in the first aspect in automotive interior and exterior trim, communication equipment, and electronic appliances.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The glass fiber reinforced nylon material provided by this invention has excellent arc resistance, anti-tracking ability and excellent mechanical properties, which can meet the application requirements of strict electrical safety performance scenarios. Detailed Implementation

[0032] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0033] Unless otherwise specified, the raw materials involved in the following specific embodiments of the present invention are all conventional materials in the art, and can be purchased from commercially available products. Some raw material information is as follows:

[0034] Polyamide: PA6, with an average molecular weight of 20,000, a molecular weight distribution width of 15,000 to 30,000, a melt flow rate (MFR, 235℃ / 2.16 kg) of 10 to 30 g / 10 min, a density of 1.13 to 1.15, a melting point of 220 to 225℃, and a glass transition temperature of 45-70℃;

[0035] Glass fiber: density: 2.41-2.46, particle size: 4-12 μm, length: 0.1-0.5 mm;

[0036] Metasilicate polymer: purchased from Jiangsu Juqian New Material Technology Co., Ltd., CZ-G20;

[0037] The preparation method of aniline black masterbatch is as follows:

[0038] Oil-melted aniline black dye (Solvent Black 7, density 1.4±0.1, pH 7.4, purity ≥98%, maximum wavelength: 565 nm, melting point 275℃), polyamide resin (PA6 above) and lubricant (ethylene bis-stearamide) were mixed, melt-extruded at 220℃, and granulated to obtain aniline black masterbatch;

[0039] Coupling agent: γ-aminopropyltrimethoxysilane;

[0040] Lubricant: Ethylene bis-stearamide.

[0041] Examples 1-5

[0042] This embodiment provides a glass fiber reinforced nylon material and its preparation method. The specific composition of the glass fiber reinforced nylon material is shown in Table 1.

[0043] Table 1

[0044]

[0045] The preparation method is as follows:

[0046] (1) Mix polyamide, metasilicate polymer, aniline black masterbatch, coupling agent and lubricant in a mixer for 10 min to obtain a mixture;

[0047] (2) Add the mixture to the main feed of the twin-screw extruder and add the glass fiber to the side feed for melt extrusion. The screw extruder temperature is 240℃, the speed is 450 r / min, and the torque is 40.

[0048] (3) After extrusion, the material is cooled and granulated to obtain glass fiber reinforced nylon material.

[0049] Comparative Example 1

[0050] This comparative example provides a glass fiber reinforced nylon material and its preparation method.

[0051] The difference from Example 1 is that, in this comparative example, the metasilicate polymer is replaced with an equal mass of aniline black masterbatch.

[0052] Comparative Example 2

[0053] This comparative example provides a glass fiber reinforced nylon material and its preparation method.

[0054] The difference from Example 1 is that, in this comparative example, the aniline black masterbatch is replaced with an equal mass of metasilicate polymer.

[0055] Comparative Example 3

[0056] This comparative example provides a glass fiber reinforced nylon material and its preparation method.

[0057] The difference from Example 1 is that no metasilicate polymer and aniline black masterbatch are added in this comparative example.

[0058] Performance testing

[0059] The performance of the samples provided in Examples 1-5 and Comparative Examples 1-3 was tested using the following methods:

[0060] (1) Relative Tracking Index (CTI): Tested using Elcometer 140, referring to the test method provided in IEC 60112 "Test methods for resistance to tracking and electrical erosion of solid insulating materials";

[0061] (2) Mechanical properties: The test was conducted using a pendulum impact tester, referring to the test method provided by ASTM D256;

[0062] The test results are as follows:

[0063] Table 2

[0064]

[0065] As demonstrated by the examples and performance tests, the glass fiber reinforced nylon material provided by the present invention has excellent arc resistance, anti-tracking ability and excellent mechanical properties, which can meet the application requirements of strict electrical safety performance scenarios.

[0066] As can be seen from the comparison of the examples and comparative examples, the metasilicate polymer and aniline black masterbatch introduced in this invention have a synergistic effect, which can improve the arc resistance and anti-tracking ability of glass fiber reinforced nylon materials.

[0067] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above process steps, that is, it does not mean that the present invention must rely on the above process steps to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of the raw materials used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A glass fiber reinforced nylon material, characterized in that, The glass fiber reinforced nylon material comprises the following components in parts by weight: The composition includes 47-75 parts polyamide, 20-40 parts glass fiber, 3-8 parts metasilicate polymer, 1-4 parts aniline black masterbatch, 0.3-0.5 parts coupling agent, and 0.5-1 parts lubricant.

2. The glass fiber reinforced nylon material according to claim 1, characterized in that, The polyamide includes any one or a combination of at least two of PA6, PA66, PA66 / 6, PA6 / 66, PA1010, PA610, PA11 or PA12; And / or, the molecular weight of the polyamide includes 15,000-20,000.

3. The glass fiber reinforced nylon material according to claim 1 or 2, characterized in that, The glass fiber has a density of 2.4-2.5, a diameter of 1-30 μm, and a length of 0.1-0.5 mm.

4. The glass fiber reinforced nylon material according to any one of claims 1-3, characterized in that, The metasilicate polymer is selected from metasilicate polymer CZ-G20.

5. The glass fiber reinforced nylon material according to any one of claims 1-4, characterized in that, The coupling agents include γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, γ-ureapropyltriethoxysilane, N-aminoethyl-γ-aminopropyltriethoxysilane, γ-aminopropylmethyldiethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, polyaminoalkyltrialkoxysilane, anilinemethyltrimethoxysilane, tris(dioctylphosphoyl)titanate isopropyl, triisostearate isopropyl titanate, isopropyl dioleoyloxy(dioctylphosphoyl)titanate isopropyl, and isopropyl dioleoyloxy(dioctylphosphoyl)titanate isopropyl. The following are included in the list of tetraisopropyl tri(dioctylphosphoyloxy)titanate, isopropyl trioleoyloxytitanate, isopropyl tri(dioctylpyrophosphoyloxy)titanate, bis(dioctyloxypyrophosphate)ethylenetitanate, bis(dioctyloxypyrophosphate)ethylenetitanate and triethanolamine chelates, tetraisopropyl di(dioctylphosphite)titanate, distearate isopropyl aluminate, isopropoxydistearate aluminate, trimethyl aluminate, triisopropyl aluminate, tribenzyl aluminate, alkoxytris(vinyl-ethoxy)zirconia, alkoxytris(p-aminophenoxy)zirconia, bis(diethyl citrate)dipropoxyzirconia chelates or tetra(triethanolamine)zirconia chelates, or any combination of two or more of these. And / or, the lubricant comprises any one or a combination of at least two of the following: silane polymer, solid paraffin, liquid paraffin, fatty acid salt, calcium stearate, zinc stearate, fatty amide, methyl bis-stearamide, oleamide, stearamide, ethylene bis-stearamide, or N,N-ethylene bis-stearamide.

6. A method for preparing a glass fiber reinforced nylon material as described in any one of claims 1-5, characterized in that, The preparation method includes: The components in the formula are mixed, melt-extruded, cooled and granulated to obtain the glass fiber reinforced nylon material.

7. The preparation method according to claim 6, characterized in that, The temperature of the melt extrusion is 220-260℃.

8. The preparation method according to claim 6 or 7, characterized in that, In the preparation method, all components except glass fiber are added from the main feed port of the screw extruder, and glass fiber is added from the side feed port.

9. The preparation method according to claim 8, characterized in that, The screw extruder has a screw speed of 300-600 r / min and a torque of 30-50.

10. The application of a glass fiber reinforced nylon material as described in any one of claims 1-5 in automotive interior and exterior trim, communication equipment, and electronic appliances.

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