Low-energy-consumption polyphenylene sulfide composite material and preparation method thereof

Abstract

The invention relates to a low-energy-consumption polyphenylene sulfide composite material and a preparation method thereof, the low-energy-consumption polyphenylene sulfide composite material comprises the following raw materials by weight: 30-60 parts of PPS resin, the PPS resin comprises low-melting-point PPS resin; 0.5 to 5 parts of a lubricant; 0.1 to 5 parts of an antioxidant; 40 to 70 parts of glass fiber cloth; and 1-15 parts of a toughening agent. According to the low-energy-consumption polyphenylene sulfide composite material and the preparation method thereof, the design is reasonable, the low-melting-point PPS is adopted to replace traditional high-melting-point PPS, the melting point of the PPS is reduced from 283 DEG C to about 250 DEG C, the energy consumption can be reduced, the processing window can be improved, the requirement for equipment is also reduced, a good infiltration effect is achieved by optimizing an infiltration process, and the production cost is reduced. The prepared polyphenylene sulfide composite material has better performance than the traditional thermoplastic composite material, and has wide application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyphenylene sulfide composites, and particularly relates to a polyphenylene sulfide composite with low energy consumption and a preparation method thereof. Background Art

[0002] Polyphenylene sulfide (PPS) is a thermoplastic crystalline polymer with excellent comprehensive properties, having good molding processability, corrosion resistance, flame retardancy, rigidity and modulus. It has high dimensional stability, excellent electrical properties, high fatigue strength, good creep resistance, easy molding, and characteristics such as aging resistance, radiation resistance, and non-toxicity. It has a wide range of uses in the fields of electronics and electricity, automobiles, precision machinery, chemical engineering, household appliances, and aviation, aerospace and national defense, and has developed into the sixth largest general engineering plastic in the world in recent years.

[0003] Traditional polyphenylene sulfide thermoplastic composites mostly use high melting point PPS as the matrix, whose melting point is usually 283°C, and the processing temperature is as high as about 315°C, resulting in problems such as large energy consumption, high equipment requirements, and narrow processing windows.

[0004] In order to solve the above problems, it is necessary to develop a polyphenylene sulfide composite with low energy consumption and a preparation method thereof. Use low melting point PPS to replace traditional high melting point PPS, reduce the melting point of PPS from 283°C to about 250°C, reduce energy consumption, improve the processing window, reduce the requirements for equipment, and achieve a good infiltration effect through optimizing the infiltration process, and prepare a polyphenylene sulfide composite whose performance is comparable to that of traditional thermoplastic composites. Summary of the Invention

[0005] Object of the Invention: To overcome the above deficiencies, the object of the present invention is to provide a polyphenylene sulfide composite with low energy consumption and a preparation method thereof, which is reasonably designed. Use low melting point PPS to replace traditional high melting point PPS, reduce energy consumption, improve the processing window and reduce equipment requirements. Through process optimization, achieve a good infiltration effect, prepare a polyphenylene sulfide composite whose performance is comparable to that of traditional thermoplastic composites, and has a wide application prospect.

[0006] The object of the present invention is achieved through the following technical solutions: A polyphenylene sulfide composite with low energy consumption, comprising the following raw materials in parts by weight: 30 - 60 parts of PPS resin, and the PPS resin includes low melting point PPS resin; 0.5 - 5 parts of lubricant; 0.1 - 5 parts of antioxidant; 40 - 70 parts of glass fiber cloth; 1 - 15 parts of toughening agent.

[0007] The polyphenylene sulfide composite material described in the present invention has a reasonable formulation design. Using low-melting-point PPS to completely or partially replace traditional high-melting-point PPS can reduce energy consumption, improve the processing window, and lower equipment requirements. The fiberglass cloth, as a reinforcing material, can significantly improve the tensile strength and modulus of the composite material. The addition of a lubricant improves the processing fluidity, helping the resin to be evenly distributed on the surface of the fiberglass cloth. The antioxidant prevents the PPS resin from being oxidized in a high-temperature environment and extends the service life of the material. The addition of a toughening agent improves the toughness and impact resistance of the composite material.

[0008] Furthermore, for the above-mentioned low-energy-consumption polyphenylene sulfide composite material, the melting point of the low-melting-point PPS resin is 250°C to 260°C.

[0009] The melting point of the low-melting-point PPS resin is 250°C to 260°C, the density is 1.34 - 1.38 g / cm 3 , the Rockwell hardness is R110 - R120, the linear expansion coefficient: in the flow direction is 3.0 - 5.0×10⁻ 5 / °C, in the perpendicular direction is 5.0 - 8.0×10⁻ 5 / °C, the heat distortion temperature is 110°C, the flame retardancy is V0, and the tensile strength is 60 MPa.

[0010] Furthermore, for the above-mentioned low-energy-consumption polyphenylene sulfide composite material, the lubricant is one or a combination of silicone powder, PTFE, TAF, calcium stearate, etc.

[0011] Preferably, the lubricant is calcium stearate.

[0012] Calcium stearate can make each component disperse more evenly during mixing and extrusion, thereby improving the processing performance of the composite material and further affecting its wettability and mechanical properties.

[0013] Furthermore, for the above-mentioned low-energy-consumption polyphenylene sulfide composite material, the antioxidant is one or a combination of distearyl pentaerythritol diphosphite and bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite.

[0014] Preferably, the antioxidant is distearyl pentaerythritol diphosphite.

[0015] Distearyl pentaerythritol diphosphite can protect the molecular structure of the PPS resin, making its performance more stable in high-temperature environments and the like, and helping to improve the mechanical properties of the composite material.

[0016] Furthermore, in the above-mentioned low-energy consumption polyphenylene sulfide composite material, the glass fiber cloth is one of 200g plain glass fiber cloth, 200g twill glass fiber cloth, 320g plain glass fiber cloth, 320g twill glass fiber cloth, 390g plain glass fiber cloth, and 390g twill glass fiber cloth.

[0017] Preferably, the glass fiber cloth is 320g plain glass fiber cloth.

[0018] Furthermore, in the above-mentioned low-energy consumption polyphenylene sulfide composite material, the toughening agent is one or a combination of multiple of AX8900, SEBS, and NBR.

[0019] Preferably, the toughening agent is AX8900.

[0020] Toughener AX8900 is an EMA terpolymer that can form a good interface bond between the matrix resin and the reinforcing fibers, enabling the composite material to better disperse stress when subjected to force, thereby improving its mechanical properties. The present invention also relates to a method for preparing the low-energy consumption polyphenylene sulfide composite material, comprising the following steps: S1: Place the PPS resin in a dryer and dry for 2-4 hours; S2: After the dried PPS resin is cooled at room temperature for 0.5-2 hours, it is placed in a high-speed mixer, and a lubricant, an antioxidant, and a toughening agent are added in sequence, and stirred for 10-20 minutes to obtain a mixture; S3: adding the mixed material into a twin-screw extruder, setting the melting temperature of the twin-screw extruder to 220°C to 310°C, water-cooling the material strips extruded from the twin-screw extruder, and then pelletizing them with a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: placing the thermoplastic modified particles in a dryer and drying them for 2 to 4 hours; S5: Preheat the glass fiber cloth in a heater at a temperature of 260-305°C; S6: Evenly spread the dried thermoplastic modified particles on the surface of the preheated glass fiber cloth for 10 to 30 seconds to obtain a semi-impregnated thermoplastic composite material; the mass ratio of the thermoplastic modified particles to the glass fiber cloth is (0.5:1) to (2:1); S7: Lay the semi-impregnated thermoplastic composite material in the mold, cover the mold with an upper cover, and then perform hot pressing at a temperature of 270-315° C. for 5-30 min. Demold after cooling to obtain a polyphenylene sulfide composite material.

[0021] In terms of the preparation process, the set melting temperature, preheating temperature, and molding temperature of the twin-screw extruder are significantly lower than those of traditional processing temperatures. The reduction of these temperatures directly reduces energy consumption. At the same time, since the processing temperature range becomes wider, the processing window is improved, and the high-temperature resistance requirements for the equipment are correspondingly reduced. Moreover, when the equipment operates at a lower temperature, its service life may be extended, and the maintenance cost will also be reduced.

[0022] Preferably, the semi-impregnated thermoplastic composite material is laid in the mold, and the number of laying layers is 3 to 12 layers. Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in S1, the dryer is a blast dryer, the drying temperature is 120 °C, and the drying time is 3 h.

[0023] This step can remove the moisture in the PPS resin, prevent the generation of bubbles during subsequent processing, and affect the quality and performance of the composite material. The dried PPS resin can be better dispersed when mixed with other components.

[0024] Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in S2, the speed of the high-speed mixer is set at 300 r / min, and the stirring time is 16 min.

[0025] High-speed mixing can make each component fully mixed and uniform, ensure the uniform distribution of each component in the composite material, and thus improve the performance stability of the composite material.

[0026] Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in S3, the mixed material is added to the main feeding bin of the twin-screw extruder, the main feeding frequency is set at 5 to 15 Hz, and the screw speed is 100 to 300 r / min.

[0027] Preferably, in S3, the main feeding frequency is set at 10 Hz, the melting temperature of the twin-screw extruder is set at 295 °C, the length-diameter ratio of the twin-screw is 44:1, and the screw speed is 250 r / min.

[0028] In terms of the set melting temperature of the twin-screw extruder, traditional materials require a higher temperature, while this composite material is set at 295 °C, which is significantly lower than the traditional processing temperature.

[0029] Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in S4, the drying temperature is 120 °C, and the drying time is 3 h.

[0030] This step can remove the moisture in the thermoplastic modified particles again to ensure that no bubbles will be generated during the subsequent hot pressing process.

[0031] Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in step S5, the preheating temperature is 260°C.

[0032] Preheat the fiberglass cloth to a temperature higher than the resin melting point to promote the immediate and uniform adhesion of the thermoplastic modified particles to the fibers, improve the wetting effect, and reduce voids or dry spots in the composite material. After 10 - 30 seconds, the thermoplastic modified particles are slightly melted and adhered to the surface of the fiberglass cloth without falling off.

[0033] In terms of the preheating temperature, traditional materials require a higher temperature, while the preheating temperature of the composite material is 260°C, which is significantly lower than the traditional preheating temperature.

[0034] Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in step S6, the mass ratio of the thermoplastic modified particles to the fiberglass cloth is 1:1.

[0035] When the mass ratio of the thermoplastic modified particles to the fiberglass cloth is 1:1, it can ensure sufficient matrix material to wrap the reinforcing material, while avoiding a decrease in wettability caused by excessive resin.

[0036] Further, in the preparation method of the above-mentioned low-energy consumption polyphenylene sulfide composite material, in step S7, the hot pressing temperature is 275°C and the time is 10 minutes.

[0037] During the hot pressing and forming process, high temperature and pressure can further melt and flow the resin, fully wet the fiberglass cloth, and at the same time make the structure of the composite material more dense, improving its mechanical properties. The hot pressing temperature is reduced to 275°C, which is significantly lower than the traditional hot pressing temperature.

[0038] Compared with the prior art, the present invention has the following beneficial effects: (1) For the low-energy consumption polyphenylene sulfide composite material disclosed in the present invention, low melting point PPS is used to replace high melting point PPS, reducing the temperature requirements during the processing. The lower processing temperature reduces the requirements for the high-temperature resistance performance of the equipment, expands the selection range of the equipment, reduces the cost, and at the same time, the equipment operates at a lower temperature, and the maintenance and repair costs will also be correspondingly reduced. The wider processing temperature range makes the production process easier to control, reduces the problem of product quality instability caused by temperature fluctuations, and improves the production efficiency and product qualification rate; (2) For the preparation method of the low-energy consumption polyphenylene sulfide composite material disclosed in the present invention, the melting temperature of the twin-screw extruder is set at 220°C - 310°C, preferably 295°C, which is significantly lower than the traditional processing temperature; the preheating temperature is set at 260°C - 305°C, preferably 260°C, which is significantly lower than the traditional preheating temperature; the hot pressing temperature is reduced to 270 - 315°C, preferably 275°C. The reduction of these temperatures directly reduces the energy consumption, improves the processing window, and reduces the equipment requirements; (3) The preparation method of the low-energy polyphenylene sulfide composite material disclosed in the present invention optimizes the impregnation process through multiple steps during the preparation process; first, the PPS resin is dried to remove moisture to ensure the uniformity and stability of subsequent mixing; then, a lubricant, an antioxidant, and a toughening agent are added to a high-speed mixer and fully stirred to uniformly mix the components; then, the thermoplastic modified particles are obtained by extruding and pelletizing through a twin-screw extruder. When combining with glass fiber cloth, the glass fiber cloth is preheated to a temperature 10 to 20°C higher than the melting temperature of the thermoplastic resin, so that when the thermoplastic modified particles are spread on the preheated fabric surface, the thermoplastic resin particles can be slightly melted and adhered to the fabric surface in a short time without falling off; finally, hot pressing is performed to allow the resin to fully impregnate the glass fiber cloth; through this optimized impregnation process, the resin and the glass fiber cloth can be better combined to avoid a large number of stratification. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions in the embodiments of the present invention by combining Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 3 with specific experimental data. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. Main raw materials of Example 1 and Comparative Examples 1 to 3: low melting point PPS resin (self-made, the melting point of low melting point PPS resin is 250℃~260℃, the density is 1.34~1.38g / cm3, the Rockwell hardness is R110~R120, and the linear expansion coefficient: in the flow direction is 3.0~5.0×10⁻ 5 / ℃, 5.0~8.0×10⁻ in vertical direction 5 / ℃, heat deformation temperature of 110℃, flame retardancy of V0, tensile strength of 60MPa), conventional PPS resin (brand Q250, Shandong Binhua Fuel Chemical Co., Ltd.), toughening agent (brand AX8900, Arkema, France), calcium stearate (Lianyang Yingzheng New Materials Co., Ltd.), glass fiber cloth (320g plain glass fiber, 320g twill glass fiber, Changzhou Ruishun New Materials Co., Ltd.); others are commercially available.

[0040] Example 1 and Comparative Examples 1 to 3 provide a polyphenylene sulfide composite material and a preparation method.

[0041] Example 1 The polyphenylene sulfide composite material of Example 1 includes thermoplastic modified particles and glass fiber cloth (320g plain glass fiber), and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0042] Among them, the thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of low-melting point PPS resin, 1 part of lubricant calcium stearate, 0.5 part of antioxidant distearyl pentaerythritol diphosphite, and 1 part of toughening agent AX8900.

[0043] Preparation of the polyphenylene sulfide composite material of Example 1 includes the following steps: S1: Place the PPS resin in a blast dryer at 120 °C and dry for 3 h; S2: After the dried PPS resin is cooled at room temperature for 1 h, put it into a high-speed mixer, and sequentially add the lubricant, antioxidant, and toughening agent. Set the speed to 300 r / min and stir for 16 min to obtain a mixed material; S3: Add the mixed material to the main feeding bin of a twin-screw extruder. Set the main feeding frequency to 10 Hz, set the melting temperature of the twin-screw extruder to 295 °C, the length-diameter ratio of the twin-screw is 44:1, the screw speed is 250 r / min. The extruded strip of the twin-screw extruder is cooled by water and then pelletized by a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: Place the thermoplastic modified particles in a dryer at 120 °C and dry for 3 h; S5: Cut the fiberglass cloth into 400 mm * 400 mm, place it in a heater for preheating, and the preheating temperature is 260 °C; S6: Uniformly sprinkle the dried thermoplastic modified particles on the surface of the preheated fiberglass cloth. Wait for 10 - 30 s until the thermoplastic modified particles are slightly melted and adhered to the surface of the fiberglass cloth without falling off, to obtain a semi-impregnated thermoplastic composite material; S7: Place the semi-impregnated thermoplastic composite material in a mold, cover the upper mold cover, and then perform hot pressing. The hot pressing temperature is 275 °C, the time is 10 min, and after cooling, demold to obtain the polyphenylene sulfide composite material of Example 1.

[0044] Comparative Example 1 The polyphenylene sulfide composite material of Comparative Example 1 includes thermoplastic modified particles and fiberglass cloth (320 g plain weave fiberglass). The mass ratio of the thermoplastic modified particles to the fiberglass cloth is 1:1.

[0045] Among them, the thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of conventional PPS resin, 1 part of lubricant calcium stearate, 0.5 part of antioxidant distearyl pentaerythritol diphosphite, and 1 part of toughening agent AX8900.

[0046] Preparation of the polyphenylene sulfide composite material of Comparative Example 1 includes the following steps: S1: Place the PPS resin in a blast dryer at 120 °C and dry for 3 h; S2: After the dried PPS resin is cooled at room temperature for 1 h, it is put into a high-speed mixer, and a lubricant, an antioxidant, and a toughening agent are added in sequence. The speed is set at 300 r / min and stirred for 16 min to obtain a mixed material; S3: Add the mixed material to the main feeding bin of a twin-screw extruder. Set the main feeding frequency at 10 Hz, set the melting temperature of the twin-screw extruder at 295 °C, the length-diameter ratio of the twin-screw is 44:1, the screw speed is 250 r / min. The strip extruded from the twin-screw extruder is water-cooled and then pelletized by a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: Place the thermoplastic modified particles in a dryer at 120 °C and dry for 3 h; S5: Cut the fiberglass cloth into 400 mm * 400 mm, place it in a heater for preheating, and the preheating temperature is 300 °C; S6: Uniformly sprinkle the dried thermoplastic modified particles on the surface of the preheated fiberglass cloth. Wait for 10 - 30 s until the thermoplastic modified particles are slightly melted and adhered to the surface of the fiberglass cloth without falling off, then a semi-infiltrated thermoplastic composite material is obtained; S7: Place the semi-infiltrated thermoplastic composite material in a mold, cover the upper mold cover, and then perform hot pressing. The hot pressing temperature is 315 °C, the time is 10 min, and demold after cooling to obtain the polyphenylene sulfide composite material of Comparative Example 1.

[0047] Comparative Example 2 The polyphenylene sulfide composite material of Comparative Example 2 includes thermoplastic modified particles and fiberglass cloth (320 g twill fiberglass). The mass ratio of the thermoplastic modified particles to the fiberglass cloth is 1:1.

[0048] Among them, the thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of low-melting-point PPS resin, 1 part of lubricant calcium stearate, 0.5 part of antioxidant distearyl pentaerythritol diphosphite, and 1 part of toughening agent AX8900.

[0049] The preparation method of the polyphenylene sulfide composite material of Comparative Example 2 is the same as that of Example 1.

[0050] Comparative Example 3 The polyphenylene sulfide composite material of Comparative Example 3 includes thermoplastic modified particles and fiberglass cloth (320 g plain fiberglass). The mass ratio of the thermoplastic modified particles to the fiberglass cloth is 1.5:1.

[0051] Among them, the thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of low-melting-point PPS resin, 1 part of lubricant calcium stearate, 0.5 part of antioxidant distearyl pentaerythritol diphosphite, and 1 part of toughening agent AX8900.

[0052] The preparation method of the polyphenylene sulfide composite material of Comparative Example 3 is the same as that of Example 1.

[0053] Effect verification The polyphenylene sulfide composite materials prepared in Example 1 and Comparative Examples 1-3 were subjected to performance testing.

[0054] (1) Tensile properties: The polyphenylene sulfide composite materials prepared in Example 1 and Comparative Examples 1-3 were cut into splines of 250 mm * 25 mm, and tested according to the regulations in ASTM D3039 to obtain the tensile strength and tensile modulus of the materials.

[0055] (2) Infiltration property: The fractured splines of the polyphenylene sulfide composite materials prepared in Example 1 and Comparative Examples 1-3 were observed visually to check whether the glass fibers and the resin on the cross-section were delaminated. If there was no delamination, it was excellent; slight delamination was good; a large amount of delamination was average; and severe delamination was poor, so as to judge the resin infiltration situation. The measurement results are shown in Table 1.

[0056] Table 1 It can be seen from Table 1 that: (1) The polyphenylene sulfide composite material of Example 1 uses a low-melting-point PPS resin (melting point: 250 °C - 260 °C), has a lower processing temperature (preheating temperature 260 °C, molding temperature 275 °C), low energy consumption, and the resin has better fluidity at a lower temperature, which is beneficial to the infiltration with the glass fiber cloth. The polyphenylene sulfide composite material of Comparative Example 1 uses a conventional PPS resin (melting point: 283 °C), has a higher processing temperature (preheating temperature 300 °C, molding temperature 315 °C), high energy consumption, and high temperature may cause partial degradation of the resin, affecting the final performance. The tensile strength (310 Mpa) and tensile modulus (21.2 Gpa) of Example 1 are both higher than those of Comparative Example 1 (300 Mpa and 18.6 Gpa), indicating that: processing the low-melting-point PPS at a lower temperature can better maintain the resin properties and has a better infiltration effect with the glass fiber cloth.

[0057] (2) The polyphenylene sulfide composite material of Example 1 uses 320 g of plain weave fiberglass cloth. The plain weave fiberglass cloth has a uniform structure, a good bonding effect with the resin, and a moderate dosage, which can effectively enhance the composite material. The polyphenylene sulfide composite material of Comparative Example 2 uses 320 g of twill weave fiberglass cloth. The structure of the twill weave fiberglass cloth may cause uneven resin infiltration, and the increased dosage may cause insufficient resin distribution, resulting in a decrease in tensile strength (250 Mpa) and infiltration performance. The polyphenylene sulfide composite material of Comparative Example 3 uses 320 g of plain weave fiberglass cloth, but the dosage is reduced, resulting in a weakened strengthening effect. The tensile strength (305 Mpa) and tensile modulus (20.9 Gpa) are slightly lower than those of Example 1. It shows that: the type and dosage of fiberglass cloth directly affect the mechanical properties and infiltration effect of the composite material. When the plain weave fiberglass cloth has a uniform structure and a moderate dosage, the strengthening effect is the best.

[0058] (3) The polyphenylene sulfide composite material of Example 1 uses a preheating temperature of 260 °C and a molding temperature of 275 °C. The resin has good fluidity, can fully infiltrate the fiberglass cloth, and the infiltration performance is good. The polyphenylene sulfide composite material of Comparative Example 1 uses a preheating temperature of 300 °C and a molding temperature of 315 °C. The higher temperature may cause partial degradation of the resin or too strong fluidity, affecting the infiltration effect. Although the infiltration performance is also good, the mechanical properties are slightly lower. It shows that: too high or too low processing temperature will affect the fluidity and infiltration effect of the resin. The processing temperature of Example 1 is more suitable, ensuring the full combination of the resin and the fiberglass cloth.

[0059] In summary, by adopting the technical solution of the present invention, the problems of high energy consumption, high equipment requirements, and narrow processing window of traditional thermoplastic composite materials on the current market are solved. Combining with the molding process, high-performance thermoplastic composite products can be flexibly prepared, which have the characteristics of low cost and good wettability, and can effectively increase the market share of thermoplastic composite materials.

[0060] There are many specific application ways of the present invention, and the above is only the preferred implementation manner of the present invention. It should be noted that the above embodiments are only used to illustrate the present invention, and do not limit the protection scope of the present invention. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements can still be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A low-energy-consumption polyphenylene sulfide composite material, characterized in that: The invention comprises the following raw materials in parts by weight: 30-60 parts of PPS resin, wherein the PPS resin includes a low melting point PPS resin; Lubricant 0.5~5 parts; 0.1~5 parts of antioxidant; 40~70 parts of glass fiber cloth; Toughener 1~15 parts.

2. The low-energy consumption polyphenylene sulfide composite material according to claim 1, characterized in that: The melting point of the low melting point PPS resin is 250°C to 260°C.

3. The low-energy consumption polyphenylene sulfide composite material according to claim 1, characterized in that: The lubricant is one or a combination of silicone powder, PTFE, TAF, and calcium stearate.

4. The low-energy consumption polyphenylene sulfide composite material according to claim 1, characterized in that: The antioxidant is one of dioctadecyl pentaerythritol diphosphite and bis(2,4-dicumylphenyl)pentaerythritol-diphosphite or a combination of the two.

5. The low-energy consumption polyphenylene sulfide composite material according to claim 1, characterized in that: The glass fiber cloth is one of 200g plain glass fiber cloth, 200g twill glass fiber cloth, 320g plain glass fiber cloth, 320g twill glass fiber cloth, 390g plain glass fiber cloth and 390g twill glass fiber cloth.

6. The low-energy consumption polyphenylene sulfide composite material according to claim 1, characterized in that: The toughening agent is one or a combination of multiple of AX8900, SEBS and NBR.

7. The method for preparing a low-energy-consumption polyphenylene sulfide composite material according to any one of claims 1 to 6, characterized in that: The steps include: S1: Place the PPS resin in a dryer and dry for 2-4 hours; S2: After the dried PPS resin is cooled at room temperature for 0.5-2 hours, it is placed in a high-speed mixer, and a lubricant, an antioxidant, and a toughening agent are added in sequence, and stirred for 10-20 minutes to obtain a mixture; S3: adding the mixed material into a twin-screw extruder, setting the melting temperature of the twin-screw extruder to 220°C to 310°C, water-cooling the material strips extruded from the twin-screw extruder, and then pelletizing them with a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: placing the thermoplastic modified particles in a dryer and drying them for 2 to 4 hours; S5: Preheat the glass fiber cloth in a heater at a temperature of 260-305°C; S6: Evenly spread the dried thermoplastic modified particles on the surface of the preheated glass fiber cloth for 10 to 30 seconds to obtain a semi-impregnated thermoplastic composite material; the mass ratio of the thermoplastic modified particles to the glass fiber cloth is (0.5:1) to (2:1); S7: Lay the semi-impregnated thermoplastic composite material in the mold, cover the mold with an upper cover, and then perform hot pressing at a temperature of 270-315° C. for 5-30 min. Demold after cooling to obtain a polyphenylene sulfide composite material.

8. The method for preparing the low-energy-consumption polyphenylene sulfide composite material according to claim 7, characterized in that: In S1, the dryer is a blast dryer, the drying temperature is 120°C, and the drying time is 3 hours; in S2, the speed of the high-speed mixer is set to 300r / min, and the stirring time is 16 minutes; in S4, the drying temperature is 120°C, and the drying time is 3 hours; in S5, the preheating temperature is 260°C; in S6, the mass ratio of thermoplastic modified particles to glass fiber cloth is 1:1; in S7, the hot pressing temperature is 275°C, and the time is 10 minutes.

9. The method for preparing the low-energy-consumption polyphenylene sulfide composite material according to claim 7, characterized in that: In S3, the mixed material is added into the main feeding bin of the twin-screw extruder, and the main feeding frequency is set to 5-15 Hz and the screw speed is 100-300 r / min.

10. The method for preparing a low-energy-consumption polyphenylene sulfide composite material according to claim 9, characterized in that: In S3, the main feeding frequency is set to 10 Hz, the melt temperature of the twin-screw extruder is set to 295° C., the twin-screw aspect ratio is 44:1, and the screw speed is 250 r / min.

Images