High temperature nylon / polyphenylene sulfide alloy material, preparation method and application thereof

Abstract

The application relates to a high-temperature nylon / polyphenylene sulfide alloy material, raw materials of which include the following components in parts by weight: 40-70 parts of high-temperature nylon, 5-10 parts of polyphenylene sulfide, 5-10 parts of ultra-high molecular weight polyethylene, 10-40 parts of short carbon fiber, and proper amount of auxiliary agent; the relative molecular mass of the ultra-high molecular weight polyethylene is (1-4) x 10 6 The alloy material takes high-temperature nylon as a base material, introduces polyphenylene sulfide, ultra-high molecular weight polyethylene and short carbon fiber into the high-temperature nylon according to specific parts by weight to obtain a plastic alloy material, the polyphenylene sulfide has good compatibility with the high-temperature nylon, can effectively improve the melt flowability of the material and make the material easier to process, the introduction of the short carbon fiber and the ultra-high molecular weight polyethylene can effectively improve the wear resistance of the material, and the material can also maintain excellent mechanical properties, long-term heat resistance and various superior comprehensive properties.

Description

Technical Field

[0001] This application relates to the field of polymer functional materials technology, and in particular to a high-temperature nylon / polyphenylene sulfide alloy material, its preparation method, and its application. Background Technology

[0002] High-temperature nylon, commonly known as PPA, is a high-temperature resistant material that can be used for extended periods in environments above 150°C. Its melting point is generally between 290°C and 320°C. After modification with glass fiber, its heat distortion temperature can reach above 290°C. This material maintains excellent mechanical properties over a wide temperature range and in high-humidity environments. Currently, mature industrial high-temperature nylon varieties include PA46, PA6T, PA9T, and PA10T, etc. However, the melting point and degradation temperature of high-temperature nylon are relatively close, resulting in a narrow processing window. For example, when injection molding thin-walled parts, it is usually impossible to solve the melt flow problem by increasing the temperature. In addition, high-temperature nylon has poor wear resistance, which is detrimental to extending the material's service life. Summary of the Invention

[0003] Therefore, it is necessary to provide a high-temperature nylon / polyphenylene sulfide alloy material, its preparation method, and its application that can improve the melt flowability and wear resistance of the material.

[0004] One embodiment of this application provides a high-temperature nylon / polyphenylene sulfide alloy material, the raw materials for which are prepared by weight include the following components:

[0005]

[0006]

[0007] The relative molecular mass of the ultra-high molecular weight polyethylene is (1~4)×10 6 .

[0008] In one embodiment, the high-temperature nylon comprises one or more of aliphatic polyamides and semi-aromatic polyamides;

[0009] Optionally, the high-temperature nylon includes one or more of PA6T / 66, PA6T / 6I, PA10T, PA46, PA6I / 6T, PA1012, PA1212, PA1010, and PA66.

[0010] In one embodiment, the polyphenylene sulfide has a melt index of 100 g / 10 min to 1000 g / 10 min under test conditions of 136 °C / 5 kg;

[0011] Optionally, the polyphenylene sulfide includes one or more of linear polyphenylene sulfide and cross-linked polyphenylene sulfide.

[0012] In one embodiment, the ultra-high molecular weight polyethylene has a mesh size of 50 to 200 mesh.

[0013] In one embodiment, the length of the chopped carbon fiber is 3mm to 7mm;

[0014] Optionally, the strength grade of the chopped carbon fiber is T700 to T900.

[0015] In one embodiment, the carbon fiber is coated;

[0016] Optionally, the patina agent used for patina treatment includes one or more of epoxy resin, polyurethane, and polyamide.

[0017] In one embodiment, the additives include one or more of colorants, antioxidants, lubricants, and toughening agents;

[0018] Optionally, the colorant includes one or more of organic and inorganic color powders;

[0019] Optionally, the antioxidant includes one or more of hindered phenolic antioxidants, phosphite antioxidants, and inorganic heat stabilizers containing halide ions and / or copper ions;

[0020] Optionally, the lubricant includes one or more of oxidized polyethylene wax and polypropylene compounds;

[0021] Optionally, the toughening agent includes one or more of GMA grafts and MBS types.

[0022] In one embodiment, the additives include colorants, antioxidants, lubricants, and toughening agents;

[0023] By weight, the colorant is 0.3 to 0.5 parts, the antioxidant is 0.3 to 0.7 parts, the lubricant is 0.3 to 0.7 parts, and the toughening agent is 1 to 5 parts.

[0024] An embodiment of this application also provides a method for preparing a high-temperature nylon / polyphenylene sulfide alloy material as described in any of the above embodiments, comprising the following steps:

[0025] The high-temperature nylon, the polyphenylene sulfide, the ultra-high molecular weight polyethylene, and the additives are premixed to obtain a premix;

[0026] The premix is ​​melt-blended with the chopped carbon fibers and then extruded and granulated.

[0027] One embodiment of this application also provides the application of the high-temperature nylon / polyphenylene sulfide alloy material as described in any of the above embodiments in the manufacture of electromagnetic expansion valve rotors, vehicle-mounted chip holders, and textile machine transmission components.

[0028] The aforementioned alloy material uses high-temperature nylon as the base material and incorporates polyphenylene sulfide, ultra-high molecular weight polyethylene, and chopped carbon fibers in specific weight proportions to obtain a plastic alloy material. Polyphenylene sulfide has good compatibility with high-temperature nylon, which can effectively improve the melt flow of the material and make it easier to process. The introduction of chopped carbon fibers and ultra-high molecular weight polyethylene can effectively improve the wear resistance of the material, while also maintaining excellent mechanical properties and long-term heat resistance, among other superior comprehensive properties. Detailed Implementation

[0029] To facilitate understanding of this application, a more comprehensive description of the application is provided below with reference to embodiments. This application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0031] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0032] Unless otherwise shown or indicated in the operational embodiments, all figures used to represent the amounts, physicochemical properties, etc., of ingredients in the specification and claims are to be understood to be adjusted by the term "about" in all cases. For example, therefore, unless stated to the contrary, the numerical parameters listed in the foregoing specification and appended claims are approximations, and those skilled in the art can appropriately modify these approximations to obtain the desired characteristics by utilizing the teachings disclosed herein. The use of numerical ranges indicated by endpoints includes all numbers within that range and any range within that range; for example, 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, and 5, etc.

[0033] The weights of the relevant components mentioned in the embodiments of this invention can refer not only to the specific content of each component, but also to the proportional relationship between the weights of the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this invention is within the scope disclosed in the embodiments of this invention. Specifically, the weights mentioned in the embodiments of this invention can be well-known units of mass in the chemical industry, such as μg, mg, g, and kg.

[0034] One embodiment of this application provides a high-temperature nylon / polyphenylene sulfide alloy material, the raw materials for which are prepared by weight include the following components:

[0035]

[0036]

[0037] The relative molecular mass of ultra-high molecular weight polyethylene is (1~4)×10 6 .

[0038] The aforementioned alloy material uses high-temperature nylon as a base material, and incorporates polyphenylene sulfide, ultra-high molecular weight polyethylene, and chopped carbon fibers in specific weight proportions to obtain a plastic alloy material. Polyphenylene sulfide exhibits good compatibility with high-temperature nylon, effectively improving the melt flowability of the material and making it easier to process. The introduction of chopped carbon fibers and ultra-high molecular weight polyethylene effectively enhances the material's wear resistance while maintaining excellent mechanical properties and long-term heat resistance, among other superior comprehensive properties. Due to its high wear resistance, ability to achieve thin-walled designs, low shrinkage, high dimensional stability, and high heat resistance, this alloy material is suitable for manufacturing products such as electromagnetic expansion valve rotors, automotive chip holders, and textile machine transmission components.

[0039] In one embodiment, the high-temperature nylon may include, but is not limited to, one or more of aliphatic polyamides and semi-aromatic polyamides.

[0040] Optionally, the high-temperature nylon may include, but is not limited to, one or more of PA6T / 66, PA6T / 6I, PA10T, PA46, PA6I / 6T, PA1012, PA1212, PA1010, and PA66.

[0041] In one embodiment, the melt index of polyphenylene sulfide (PPS) under test conditions of 136°C / 5kg is 100g / 10min to 1000g / 10min. It is understood that the melt index of PPS under test conditions of 136°C / 5kg can be, for example, but not limited to, 100g / 10min, 200g / 10min, 300g / 10min, 400g / 10min, 500g / 10min, 600g / 10min, 700g / 10min, 800g / 10min, 900g / 10min, 1000g / 10min, etc. Further, the melt index of PPS under test conditions of 136°C / 5kg is 300g / 10min to 500g / 10min.

[0042] In one embodiment, the polyphenylene sulfide may include, but is not limited to, one or more of linear polyphenylene sulfide and cross-linked polyphenylene sulfide. Further, the polyphenylene sulfide is selected from cross-linked polyphenylene sulfide, which, compared to linear polyphenylene sulfide, allows the material to have higher heat resistance and mechanical strength.

[0043] In one embodiment, the mesh size of the ultra-high molecular weight polyethylene is 50 to 200 mesh. It is understood that the mesh size of the ultra-high molecular weight polyethylene may be, for example, but not limited to, 50 mesh, 80 mesh, 100 mesh, 120 mesh, 140 mesh, 160 mesh, 180 mesh, 200 mesh, etc.

[0044] In one embodiment, the length of the chopped carbon fiber is 3mm to 7mm. It is understood that the length of the chopped carbon fiber can be, for example, but not limited to, 3mm, 4mm, 5mm, 6mm, 7mm, etc.

[0045] Optionally, the strength grade of chopped carbon fiber is T700 to T900. For example, the strength grade of chopped carbon fiber can be T700, T800, T900, etc.

[0046] In one embodiment, the carbon fiber is coated.

[0047] Optionally, the patina agent used for patina treatment may include, but is not limited to, one or more of epoxy resin, polyurethane, and polyamide.

[0048] In one embodiment, the additives may include, but are not limited to, one or more of colorants, antioxidants, lubricants, and toughening agents.

[0049] Optionally, the colorant may include, but is not limited to, one or more of organic and inorganic colorants.

[0050] Furthermore, the colorant is a high-temperature resistant colorant, preferably resistant to temperatures above 350°C, and more preferably resistant to temperatures above 380°C.

[0051] Optionally, the antioxidant may include, but is not limited to, one or more of hindered phenolic antioxidants, phosphite antioxidants, and inorganic heat stabilizers containing halide ions and / or copper ions. Further, hindered phenolic antioxidants may include, but are not limited to, antioxidant 1010, antioxidant 1098, antioxidant 1330, antioxidant 259, etc. Further, phosphite antioxidants may include, but are not limited to, antioxidant 168, antioxidant 9228, etc. Further, inorganic heat stabilizers containing halide ions and / or copper ions may include, but are not limited to, inorganic heat stabilizers obtained by compounding potassium iodide, cuprous iodide, and aluminum stearate in a weight ratio of 7:1:1, etc.

[0052] Furthermore, the antioxidant is a high-temperature resistant antioxidant, preferably resistant to temperatures above 350°C.

[0053] Optionally, the lubricant may include, but is not limited to, oxidized polyethylene wax and one or more polypropylene types. It is understood that the polypropylene type is preferably low molecular weight polypropylene.

[0054] Alternatively, the toughening agent may include, but is not limited to, one or more of GMA grafts and MBS class.

[0055] In one embodiment, the additives may include, but are not limited to, colorants, antioxidants, lubricants, and toughening agents; by weight, the colorant is 0.3 to 0.5 parts, the antioxidant is 0.3 to 0.7 parts, the lubricant is 0.3 to 0.7 parts, and the toughening agent is 1 to 5 parts.

[0056] An embodiment of this application also provides a method for preparing a high-temperature nylon / polyphenylene sulfide alloy material as described in any of the above embodiments, comprising the following steps:

[0057] High-temperature nylon, polyphenylene sulfide, ultra-high molecular weight polyethylene and additives are premixed to obtain a premix;

[0058] The premix is ​​melt-blended with chopped carbon fibers and then extruded and granulated.

[0059] One embodiment of this application also provides the application of the high-temperature nylon / polyphenylene sulfide alloy material as described in any of the above embodiments in the manufacture of electromagnetic expansion valve rotors, vehicle-mounted chip holders, and textile machine transmission components.

[0060] The aforementioned high-temperature nylon / polyphenylene sulfide alloy material uses high-temperature nylon as the base material and is blended and modified with polyphenylene sulfide, ultra-high molecular weight polyethylene, and short-cut carbon fiber. This gives the material high fluidity, high wear resistance, high dimensional stability, and high heat resistance, allowing it to be used for extended periods at temperatures above 260°C. Furthermore, it exhibits excellent comprehensive mechanical properties. The material is suitable not only for high-speed rotating, sliding, and dimensionally demanding parts, but also for thin-walled molded parts, such as electromagnetic expansion valve rotors, automotive chip holders, and textile machine transmission components.

[0061] The following detailed description, in conjunction with specific embodiments and comparative examples, further illustrates the high-temperature nylon / polyphenylene sulfide alloy material, its preparation method, and its applications. It is understood that, unless otherwise specified, all raw materials in the specific embodiments are commercially available.

[0062] The sources of some of the raw materials are shown in Table 1 below.

[0063] Table 1 Sources of Some Raw Materials

[0064]

[0065] Example 1

[0066] Step 1: Weigh the raw materials for preparation:

[0067] Weigh out 52 parts PA6T / 66, 5 parts PA66, 5 parts PPS, 5 parts ultra-high molecular weight polyethylene, 30 parts chopped carbon fiber, 0.5 parts colorant, 0.5 parts antioxidant, 0.5 parts lubricant, and 3 parts toughening agent by weight.

[0068] Step 2: Preparation of alloy materials

[0069] PA6T / 66, PA66, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0070] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0071] Example 2

[0072] Step 1: Weigh the raw materials for preparation:

[0073] Weigh out 52 parts PA6T / 6I, 5 parts PA66, 5 parts PPS, 5 parts ultra-high molecular weight polyethylene, 30 parts chopped carbon fiber, 0.5 parts colorant, 0.5 parts antioxidant, 0.5 parts lubricant, and 3 parts toughening agent by weight.

[0074] Step 2: Preparation of alloy materials

[0075] PA6T / 6I, PA66, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0076] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0077] Example 3

[0078] Step 1: Weigh the raw materials for preparation:

[0079] Weigh out 52 parts PA10T, 5 parts PA66, 5 parts PPS, 5 parts ultra-high molecular weight polyethylene, 30 parts chopped carbon fiber, 0.5 parts colorant, 0.5 parts antioxidant, 0.5 parts lubricant, and 3 parts toughening agent by weight.

[0080] Step 2: Preparation of alloy materials

[0081] PA10T, PA66, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0082] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0083] Example 4

[0084] Step 1: Weigh the raw materials for preparation:

[0085] Weigh out 26 parts of PA10T, 26 parts of PA6T / 66, 5 parts of PA66, 5 parts of PPS, 5 parts of ultra-high molecular weight polyethylene, 30 parts of chopped carbon fiber, 0.5 parts of colorant, 0.5 parts of antioxidant, 0.5 parts of lubricant, and 3 parts of toughening agent by weight.

[0086] Step 2: Preparation of alloy materials

[0087] PA10T, PA6T / 66, PA66, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0088] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0089] Example 5

[0090] Step 1: Weigh the raw materials for preparation:

[0091] Weigh out 26 parts by weight of PA6T / 6I, 26 parts by weight of PA6T / 66, 5 parts by weight of PA66, 5 parts by weight of PPS, 5 parts by weight of ultra-high molecular weight polyethylene, 30 parts by weight of short-cut carbon fiber, 0.5 parts by weight of colorant, 0.5 parts by weight of antioxidant, 0.5 parts by weight of lubricant, and 3 parts by weight of toughening agent.

[0092] Step 2: Preparation of alloy materials

[0093] PA6T / 6I, PA6T / 66, PA66, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0094] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0095] Example 6

[0096] Step 1: Weigh the raw materials for preparation:

[0097] Weigh out 47 parts of PA6T / 6I, 5 parts of PA66, 5 parts of PA1315, 5 parts of PPS, 5 parts of ultra-high molecular weight polyethylene, 30 parts of chopped carbon fiber, 0.5 parts of colorant, 0.5 parts of antioxidant, 0.5 parts of lubricant, and 3 parts of toughening agent by weight.

[0098] Step 2: Preparation of alloy materials

[0099] PA6T / 6I, PA66, PA1315, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0100] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0101] Example 7

[0102] Step 1: Weigh the raw materials for preparation:

[0103] Weigh out 47 parts PA6T / 6I, 10 parts PA66, 5 parts PPS, 5 parts ultra-high molecular weight polyethylene, 30 parts chopped carbon fiber, 0.5 parts colorant, 0.5 parts antioxidant, 0.5 parts lubricant, and 3 parts toughening agent by weight.

[0104] Step 2: Preparation of alloy materials

[0105] PA6T / 6I, PA66, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0106] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0107] Example 8

[0108] Step 1: Weigh the raw materials for preparation:

[0109] Weigh out 47 parts of PA6T / 6I, 10 parts of PA1315, 5 parts of PPS, 5 parts of ultra-high molecular weight polyethylene, 30 parts of chopped carbon fiber, 0.5 parts of colorant, 0.5 parts of antioxidant, 0.5 parts of lubricant, and 3 parts of toughening agent by weight.

[0110] Step 2: Preparation of alloy materials

[0111] PA6T / 6I, PA1315, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0112] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0113] Example 9

[0114] Step 1: Weigh the raw materials for preparation:

[0115] Weigh out 42 parts of PA6T / 6I, 10 parts of PA1315, 10 parts of PPS, 5 parts of ultra-high molecular weight polyethylene, 30 parts of chopped carbon fiber, 0.5 parts of colorant, 0.5 parts of antioxidant, 0.5 parts of lubricant, and 3 parts of toughening agent by weight.

[0116] Step 2: Preparation of alloy materials

[0117] PA6T / 6I, PA1315, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0118] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0119] Example 10

[0120] Step 1: Weigh the raw materials for preparation:

[0121] Weigh out 42 parts of PA6T / 6I, 5 parts of PA1315, 10 parts of PPS, 10 parts of ultra-high molecular weight polyethylene, 30 parts of chopped carbon fiber, 0.5 parts of colorant, 0.5 parts of antioxidant, 0.5 parts of lubricant, and 3 parts of toughening agent by weight.

[0122] Step 2: Preparation of alloy materials

[0123] PA6T / 6I, PA1315, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0124] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0125] Example 11

[0126] Step 1: Weigh the raw materials for preparation:

[0127] Weigh out 26 parts of PA6T / 66, 42 parts of PA6T / 6I, 10 parts of PPS, 10 parts of ultra-high molecular weight polyethylene, 40 parts of chopped carbon fiber, 0.5 parts of colorant, 0.5 parts of antioxidant, 0.5 parts of lubricant, and 3 parts of toughening agent by weight.

[0128] Step 2: Preparation of alloy materials

[0129] PA6T / 66, PA6T / 6I, PPS, ultra-high molecular weight polyethylene, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0130] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0131] Comparative Example 1

[0132] Step 1: Weigh the raw materials for preparation:

[0133] Weigh out 70 parts PA6T / 66, 30 parts glass fiber, 0.5 parts colorant, 0.5 parts antioxidant, 0.5 parts lubricant, and 3 parts toughening agent by weight.

[0134] Step 2: Preparation of alloy materials

[0135] PA6T / 66, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0136] The premix and glass fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0137] Comparative Example 2

[0138] Step 1: Weigh the raw materials for preparation:

[0139] Weigh out 70 parts PA6T / 66, 30 parts chopped carbon fiber, 0.5 parts colorant, 0.5 parts antioxidant, 0.5 parts lubricant, and 3 parts toughening agent by weight.

[0140] Step 2: Preparation of alloy materials

[0141] PA6T / 6I, PA1315, colorant, antioxidant, lubricant, and toughening agent are premixed and mixed evenly to obtain a premix.

[0142] The premix and chopped carbon fiber side feed are fed into an extruder for melt blending and extrusion granulation.

[0143] The details of the components in the raw materials for preparing the alloy materials of Examples 1 to 11 and Comparative Examples 1 to 2 are shown in Table 2 below.

[0144] Table 2. Details of components in the raw materials for preparing alloy materials

[0145]

[0146] The performance of the plastic alloys prepared in Examples 1 to 11 and Comparative Examples 1 to 2 was tested, and the test results are shown in Table 3 below.

[0147] Table 3 Performance test results of plastic alloys

[0148]

[0149] As shown in Table 3, compared with Comparative Examples 1 to 2, the plastic alloys prepared in Examples 1 to 11 have a higher melt flow index, indicating that the material can have better fluidity after blending PPA and PPS, which can effectively reduce the melting point of the material. However, the mechanical properties and heat distortion temperature are not significantly changed, indicating that the material still has high rigidity and long-term performance at high temperatures. Moreover, the plastic alloys prepared in Examples 1 to 11 have a lower coefficient of friction, and the overall wear resistance is improved.

[0150] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0151] The above embodiments are merely illustrative of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high temperature nylon / polyphenylene sulfide alloy material characterized by, The raw materials for preparing the alloy material include the following components in parts by weight: high temperature nylon 40-70 parts, polyphenylene sulfide 5-10 parts, ultra-high molecular weight polyethylene 5-10 parts, short carbon fiber 10-40 parts, and appropriate amount of additives. The relative molecular mass of the ultra-high molecular weight polyethylene is (1~4)×10 6 The polyphenylene sulfide is a cross-linked polyphenylene sulfide, the high-temperature nylon includes aliphatic polyamide and semi-aromatic polyamide, and the length of the short-cut carbon fiber is 3mm~7mm.

2. The high temperature nylon / polyphenylene sulfide alloy material of claim 1, wherein, The semi-aromatic polyamide includes one or more of PA6T / 66, PA6T / 6I, PA10T and PA6I / 6T; and the aliphatic polyamide includes one or more of PA46, PA1012, PA1212, PA1010 and PA66.

3. The high temperature nylon / polyphenylene sulfide alloy material of claim 1, wherein, The polyphenylene sulfide has a melt index of 100-1000 g / 10 min under the test condition of 136 ℃ / 5 kg.

4. The high temperature nylon / polyphenylene sulfide alloy material of claim 1, wherein The ultra-high molecular weight polyethylene has a mesh number of 50-200.

5. The high temperature nylon / polyphenylene sulfide alloy material of claim 1, wherein, The short carbon fiber has a strength grade of T700-T900.

6. The high temperature nylon / polyphenylene sulfide alloy material of claim 1, wherein The carbon fiber is treated with sizing agent.

7. The high temperature nylon / polyphenylene sulfide alloy material of claim 6, wherein, The sizing agent for the sizing treatment includes one or more of epoxy resin, polyurethane and polyamide.

8. The high temperature nylon / polyphenylene sulfide alloy material according to any one of claims 1-7, wherein, One or more of the following conditions are met: (1) the additives include one or more of colorant, antioxidant, lubricant and toughening agent; (2) the colorant includes one or more of organic colorant and inorganic colorant; (3) the antioxidant includes one or more of hindered phenol antioxidant, phosphite antioxidant and inorganic thermal stabilizer containing halogen ion and / or copper ion; (4) the lubricant includes one or more of oxidized polyethylene wax and polypropylene; (5) the toughening agent includes one or more of GMA graft and MBS.

9. The high temperature nylon / polyphenylene sulfide alloy material of claim 8, wherein, The additives include colorant, antioxidant, lubricant and toughening agent. The colorant is 0.3-0.5 parts by weight, the antioxidant is 0.3-0.7 parts by weight, the lubricant is 0.3-0.7 parts by weight, and the toughening agent is 1-5 parts by weight.

10. A process for producing the high temperature nylon / polyphenylene sulfide alloy material according to any one of claims 1 to 9, characterized by, The method includes the following steps: premixing the high temperature nylon, the polyphenylene sulfide, the ultra-high molecular weight polyethylene and the additives to obtain a premix; melt blending the premix and the short carbon fiber, and extruding and granulating.

11. Use of the high temperature nylon / polyphenylene sulfide alloy material according to any one of claims 1-9 in manufacturing electromagnetic expansion valve rotor, vehicle-mounted chip support and textile machine transmission component.

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