High-stability glass fiber reinforced plastic composite material and automobile pipeline quick-plug connector made of high-stability glass fiber reinforced plastic composite material

Abstract

The invention is applied to the technical field of automobile pipeline quick-plug connectors, and discloses a high-stability glass fiber reinforced plastic composite material which is prepared from the following components in percentage by weight: polypropylene (PP) resin; an alkali-free glass fiber (GF); a hydrolysis stabilizer; a temperature-resistant auxiliary agent; an antioxidant; and a processing aid. According to the high-stability glass fiber reinforced plastic composite material, the polypropylene resin is used as a matrix and has a synergistic effect with the alkali-free glass fibers in a specific proportion, good basic strength and rigidity are provided for the material, and the hydrolysis stabilizer is added, such as a metal soap compound, a hindered amine compound and an epoxy compound, so that the high-stability glass fiber reinforced plastic composite material has good stability. The high-temperature-resistant additive and the high-temperature-resistant additive can effectively inhibit hydrolysis reaction of the material in a high-temperature and high-humidity environment and prevent performance degradation caused by hydrolysis, and the toughening agent and the high-temperature-resistant modifier in the high-temperature-resistant additive enhance the toughness and the high-temperature-resistant performance of the material respectively, so that the material can still keep good mechanical performance when facing temperature change.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile pipeline quick-plug connectors, in particular to a high-stability glass fiber reinforced plastic composite material and an automobile pipeline quick-plug connector thereof. Background Art

[0002] Resin-based composites, also known as fiber-reinforced plastics, are a type of composite material with mature technology and wide application. They are made by reinforcing a thermosetting or thermoplastic resin matrix with chopped or continuous fibers and their fabrics. In the automotive field, the application of glass fiber reinforced composites is constantly expanding. With the development of the automotive industry, the requirements for lightweight, safe and reliable vehicles are increasing. Glass fiber reinforced composites have become one of the main raw materials in the automotive industry due to their excellent material properties, such as low density, high design freedom, corrosion resistance, impact resistance and vibration absorption. They can effectively replace metals such as steel and aluminum in structural parts, achieving significant lightweighting effects. However, existing glass fiber reinforced plastic composite materials still have some problems in practical applications. On the one hand, in some complex environments such as high temperature and high humidity, the stability of the material is insufficient and performance degradation is prone to occur. For example, after long-term use of ordinary glass fiber reinforced plastics in high temperature and high humidity environments, its mechanical properties such as strength and toughness will be significantly reduced, which limits its application in some key automotive components that have strict requirements on material performance stability, such as automobile engine peripheral pipes, automobile brake system related components, etc. On the other hand, in application scenarios such as automobile pipeline connections, the existing connecting components have the problem of connection reliability that needs to be improved when using glass fiber reinforced plastic composite materials. Common automobile pipeline quick connectors may become loose or fall off during long-term use due to factors such as vibration and temperature changes during vehicle driving, affecting the normal operation of the automobile pipeline system and even causing safety hazards. In summary, developing a glass fiber reinforced plastic composite material with high stability, which can maintain excellent performance in complex environments and meet the material reliability requirements in application scenarios such as automotive pipeline connections has important practical significance and market demand. Summary of the Invention

[0003] The object of the present invention is to provide a highly stable glass fiber reinforced plastic composite material and its automotive pipe quick-connect connector to solve the problems of insufficient stability of existing glass fiber reinforced plastic composite materials in complex environments and poor connection reliability of automotive pipe connection components raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a highly stable glass fiber reinforced plastic composite material, the composite material being made of the following components in percentage by weight: Polypropylene resin 45-65%; E-glass fiber 25-35%; Hydrolysis stabilizer 0.5-2%; Heat resistant additive 5-15%; Antioxidant 0.5-1%; Processing aid 0.5-1%.

[0005] Preferably, the hydrolysis stabilizer is one or more of a metal soap compound, a hindered amine compound or an epoxy compound; The metal soap compound is one of calcium stearate and zinc stearate, the hindered amine compound is bis(2,2,6,6-tetramethylpiperidinyl) sebacate, and the epoxy compound is one of epoxidized soybean oil and epoxy fatty acid methyl ester; The heat-resistant additives include toughening agents and high-temperature-resistant modifiers; The toughening agent is one or more of ethylene-propylene dimer, ethylene-octene copolymer and hydrogenated styrene-butadiene block copolymer, and the high-temperature resistant modifier is one or more of talc powder and mica powder.

[0006] Preferably, the antioxidant is a complex of a phenolic antioxidant and a phosphite antioxidant; The phenolic antioxidant is one of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and dioctadecyl pentaerythritol diphosphite, and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite; The processing aid is a lubricant or a coupling agent; The lubricant is selected from one of stearic acid, ethylene bisstearamide and silicone masterbatch, and the coupling agent is gamma-methacryloxypropyltrimethoxysilane, which is used for surface treatment of alkali-free glass fiber.

[0007] Preferably, the composite material is prepared by the following steps: S1. Treating the alkali-free glass fiber with a processing aid and drying it for later use; S2. Add PP resin, hydrolysis stabilizer, heat-resistant additive, and antioxidant into a high-speed mixer and mix at 80-100°C for 5-10 minutes; S3. Blending the mixed material with the treated glass fiber through a twin-screw extruder, with the temperature of each section of the extruder being 180-220° C. and the screw speed being 200-300 r / min, and performing melt plasticization, extrusion, cooling, pelletizing, and drying to obtain the composite material.

[0008] A high-stability glass fiber reinforced plastic composite material automobile pipeline quick plug connector, including a plug, one end of the plug is installed with one end of a connector, and the other end of the connector is fixedly connected to the pipe connector, the upper surface of the end of the plug connected to the connector is fixedly provided with a positioning block, and the outer surface of the plug on the side of the positioning block away from the connector is provided with a first reinforcing rib, the lower surface of the end of the plug connected to the connector is fixedly provided with a clamping block, and the outer surface of the plug on the side of the clamping block away from the connector is provided with a second reinforcing rib, the inner upper surface of the end of the connector connected to the plug is provided with a positioning groove, and the inner lower surface of the end of the connector connected to the plug is provided with a clamping groove, and the outer surface of the connector opposite to the positioning groove and the clamping groove is fixedly provided with a third reinforcing rib. Preferably, anti-slip grooves are provided on both outer surfaces of the plug, a rotating shaft is installed on the outer surface of the lower end of the connector, a locking rod is fixedly connected to the upper end of the shaft, and a rebound plate is fixedly provided on the side surface of one end where the locking rod is connected to the shaft.

[0009] By adopting the above technical solution, the arc-shaped matching design of the anti-slip groove and the locking rod allows the plug and the connector to form a secondary locking structure after engagement, effectively preventing accidental disengagement due to vibration or external force during vehicle driving. The locking rod is rotated by the rotating shaft, which facilitates quick installation and disassembly and improves maintenance efficiency.

[0010] Preferably, the connection between the connector and the pipe joint is arc-shaped, and the connector and the pipe joint are L-shaped as a whole.

[0011] By adopting the above technical solution, the L-shaped structural layout optimizes space utilization, adapts to the compact installation environment in the car engine compartment, and avoids interference with other components.

[0012] Preferably, the positioning block is fixedly connected to the end facing the first reinforcement rib, the clamping block is fixedly connected to the end facing the second reinforcement rib, and the positioning block and the clamping block are symmetrically arranged on both sides of the central axis of the connector, the plug is mounted on the connector through the positioning block and the positioning groove, and the plug is mounted on the connector through the clamping block and the clamping groove.

[0013] By adopting the above technical solution, the dual locking structure of the positioning block and the positioning slot, and the locking block and the locking slot realizes the precise positioning and firm connection of the plug and the connector. The symmetrically distributed first reinforcement ribs and the second reinforcement ribs enhance the structural strength of the locking part, effectively resisting external force impact and extending the service life.

[0014] Preferably, the anti-slip groove is designed in an arc shape, and the anti-slip groove is symmetrically arranged on the outer surface of the plug on both sides of the positioning block. The locking rod is designed in an arc shape, and the locking rod passes through the yield groove, and one end of the locking rod is located inside the connector and is engaged with the anti-slip groove.

[0015] By adopting the above technical solution, the cooperation between the arc-shaped anti-slip groove and the locking rod provides a larger contact area, disperses the locking force, and reduces stress concentration. The locking rod passes through the give way groove and engages with the anti-slip groove to form a concealed locking structure, preventing external impurities from entering and affecting the locking effect.

[0016] Preferably, the rebound plates are symmetrically arranged on both sides of the lower end of the locking rod, and a spring is connected between the rebound plates and the outer surface of the connecting head.

[0017] By adopting the above technical solution, the combined design of the rebound plate and the spring enables the locking rod to have an anti-slip function, ensuring that the locking rod is always inserted into the anti-slip groove when the plug is inserted, providing a continuous and stable locking force.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the highly stable glass fiber reinforced plastic composite material: 1. In terms of material performance, the polypropylene resin is used as the matrix, which works synergistically with a specific proportion of alkali-free glass fiber to provide the material with good basic strength and rigidity. The added hydrolysis stabilizer, whether it is a metal soap compound, a hindered amine compound or an epoxy compound, can effectively inhibit the hydrolysis reaction of the material in a high temperature and high humidity environment, preventing performance degradation caused by hydrolysis. The toughening agent and high temperature resistant modifier in the heat resistant additive respectively enhance the toughness and high temperature resistance of the material, so that the material can still maintain good mechanical properties when facing temperature changes. The combined use of phenolic antioxidants and phosphite antioxidants effectively delays the oxidation process of the material and extends the service life of the material. 2. The lubricant improves the processing fluidity of the material, facilitating molding. Furthermore, the coupling agent surface treats the alkali-free glass fiber, enhancing the interfacial bonding between the glass fiber and the resin matrix, further improving the overall performance of the composite material. As a result, the composite material can maintain excellent mechanical properties such as strength, toughness, and fatigue resistance for a long time in complex environments such as high temperature and high humidity. This meets the stringent requirements for material performance stability in key components such as automotive engine peripheral pipelines and brake systems, greatly expanding the application range of glass fiber reinforced plastic composites. 3. The dual locking structure of the positioning block and positioning slot, and the clamping block and clamping slot, between the plug and connector achieves a precise and secure connection. When the plug is inserted into the connector, the positioning block fits into the positioning slot, and the clamping block fits into the clamping slot. This dual locking design effectively resists vibration and external forces during vehicle operation, ensuring that the connection is not easily loosened. Furthermore, the positioning block is fixedly connected to the first reinforcing rib, and the clamping block is fixedly connected to the second reinforcing rib, and are symmetrically arranged on either side of the central axis of the connector. The presence of the first, second, and third reinforcing ribs further enhances the structural strength of the plug, connector, and their connection, reducing the risk of deformation and damage due to stress. 4. The coordinated design of the anti-slip groove and the locking rod further enhances the reliability of the connection. The anti-slip groove is arc-shaped and symmetrically arranged on the outer surface of the plug on both sides of the positioning block. The locking rod is also arc-shaped, extending through the clearance groove on the connector. One end located inside the connector engages with the anti-slip groove. When the plug and connector are connected in place, the locking rod rotates to engage with the anti-slip groove, effectively preventing the plug from being accidentally pulled out. In addition, the rebound plates symmetrically arranged on both sides of the lower end of the locking rod are connected to the outer surface of the connector with a spring. This structure enables the locking rod to always maintain a locked state on the plug, further ensuring the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the plug, connector and pipe joint of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the plug, the positioning block and the first reinforcing rib of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the connection between the plug and the anti-slip groove of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the connector, positioning groove and clamping groove of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the connection section of the rotating shaft, the locking rod and the rebound plate of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the connection between the rotating shaft, the locking rod and the rebound plate of the present invention.

[0020] In the figure: 1. Plug; 2. Connector; 3. Pipe joint; 4. Positioning block; 5. First reinforcing rib; 6. Clamping block; 7. Second reinforcing rib; 8. Anti-slip groove; 9. Positioning groove; 10. Clamping groove; 11. Third reinforcing rib; 12. Clearance groove; 13. Rotating shaft; 14. Locking rod; 15. Rebound plate. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 7 The present invention provides a technical solution: a highly stable glass fiber reinforced plastic composite material.

[0023] Embodiment 1: This embodiment discloses: a plug 1, one end of the plug 1 is mounted with one end of a connector 2, and the other end of the connector 2 is fixedly connected to a pipe joint 3, a positioning block 4 is fixedly provided on the upper surface of the end of the plug 1 connected to the connector 2, and the outer surface of the plug 1 on the side of the positioning block 4 away from the connector 2 is provided with a first reinforcing rib 5, a clamping block 6 is fixedly provided on the lower surface of the end of the plug 1 connected to the connector 2, and a second reinforcing rib 7 is provided on the outer surface of the plug 1 on the side of the clamping block 6 away from the connector 2, a positioning groove 9 is provided on the inner upper surface of the end of the connector 2 connected to the plug 1, and a clamping groove 10 is provided on the inner lower surface of the end of the connector 2 connected to the plug 1, and a third reinforcing rib 11 is fixedly provided on the outer surface of the connector 2 opposite to the positioning groove 9 and the clamping groove 10; Anti-slip grooves 8 are provided on both outer surfaces of the plug 1. A rotating shaft 13 is mounted on the outer surface of the lower end of the connector 2. A locking rod 14 is fixedly connected to the upper end of the shaft 13. A rebound plate 15 is fixedly provided on the side surface of the end where the locking rod 14 is connected to the shaft 13. The connection between the connector 2 and the pipe joint 3 is arc-shaped, and the connector 2 and the pipe joint 3 are L-shaped as a whole; The positioning block 4 is fixedly connected to the end facing the first reinforcing rib 5, and the clamping block 6 is fixedly connected to the end facing the second reinforcing rib 7. The positioning block 4 and the clamping block 6 are symmetrically arranged on both sides of the central axis of the connector 2. The plug 1 is mounted on the connector 2 by means of the positioning block 4 and the positioning groove 9, and the plug 1 is mounted on the connector 2 by means of the clamping block 6 and the clamping groove 10. When it is necessary to connect the automobile pipeline, first align the plug 1 with the connector 2. The positioning block 4 on the upper surface of one end of the plug 1 and the connector 2 and the clamping block 6 on the lower surface are respectively inserted into the positioning groove 9 on the inner upper surface and the clamping groove 10 on the lower surface of the connector 2. During the insertion process, the positioning block 4 and the positioning groove 9, the clamping block 6 and the clamping groove 10 cooperate with each other to play a role in precise positioning, and at the same time form a stable clamping structure to limit the horizontal movement of the plug 1, effectively resist the vibration and external force generated during the driving of the vehicle, and prevent the plug 1 and the connector 2 from loosening. The pipe joint 3 is directly connected to the medium transmission hose; The first reinforcing rib 5 and the second reinforcing rib 7 on the plug 1, as well as the third reinforcing rib 11 on the connector 2, can enhance the structural strength of each component during the connection process. When the pipeline is subjected to external force, these reinforcing ribs can disperse the stress, reduce the risk of deformation and damage caused by the force, and further ensure the reliability of the connection.

[0024] Embodiment 2: This embodiment is disclosed on the basis of embodiment 1: the anti-slip groove 8 is designed to be arc-shaped, and the anti-slip groove 8 is symmetrically arranged on the outer surface of the plug 1 on both sides of the positioning block 4. The locking rod 14 is designed to be arc-shaped, and the locking rod 14 passes through the clearance groove 12, and the end of the locking rod 14 located inside the connector 2 is engaged with the anti-slip groove 8. The rebound plate 15 is symmetrically arranged on both sides of the lower end of the locking rod 14, and a spring is connected between the rebound plate 15 and the outer surface of the connector 2; Before the plug 1 is inserted into the connector 2, the rebound plate 15 rotates the shaft 13 on the outer surface of the lower end of the connector 2, driving the locking rod 14 fixedly connected to the upper end of the shaft 13 to rotate. Then, when the plug 1 and the connector 2 are engaged, the rebound plate 15 is released. Under the action of the spring, the rebound plate 15 drives the locking rod 14 to rotate and reset. Since the locking rod 14 is arc-shaped and passes through the give way groove 12, the end of the rotating locking rod 14 located inside the connector 2 can be engaged with the arc-shaped anti-slip groove 8 symmetrically arranged on the outer surface of the plug 1. Through this engagement action, the locking rod 14 cooperates with the anti-slip groove 8 to form a line of defense to prevent the plug 1 from being accidentally pulled out, thereby further improving the reliability of the connection.

[0025] Example 3: Proportion: polypropylene (PP) resin 45%, alkali-free glass fiber (GF) 35%, hydrolysis stabilizer (calcium stearate) 2%, heat-resistant additive (EPDM) 15%, antioxidant (1010) 1%, processing aid (γ-methacryloyloxypropyltrimethoxysilane) 2%.

[0026] Preparation steps: 1. Treat the alkali-free glass fiber with γ-methacryloxypropyltrimethoxysilane and dry it at 80°C for later use.

[0027] 2. Add PP resin, calcium stearate, EPDM and 1010 into a high-speed mixer and mix at 80°C for 10 minutes.

[0028] 3. The mixed material and the treated glass fiber are blended through a twin-screw extruder, with the temperature of each section being 180-220°C and the screw speed being 200 r / min. The composite material is obtained through melt plasticization, extrusion, cooling, pelletizing and drying.

[0029] Performance test results: tensile strength 85MPa, flexural strength 120MPa, impact strength 15kJ / m², heat deformation temperature 125℃.

[0030] Example 4: Proportion: polypropylene (PP) resin 65%, alkali-free glass fiber (GF) 25%, hydrolysis stabilizer (epoxidized soybean oil) 0.5%, heat-resistant additive (POE) 10%, antioxidant (168) 1%, processing aid (stearic acid) 3.5%.

[0031] Preparation steps: 1. Treat the alkali-free glass fiber with stearic acid and then dry it.

[0032] 2. Add PP resin, epoxy soybean oil, POE and 168 into a high-speed mixer and mix at 90°C for 8 minutes.

[0033] 3. The mixed material and the treated glass fiber are blended in a twin-screw extruder with the temperature of each section being 185-220°C and the screw speed being 250r / min. The composite material is then obtained by melt plasticization, extrusion, cooling, pelletizing and drying.

[0034] Performance test results: tensile strength 70MPa, flexural strength 100MPa, impact strength 18kJ / m², heat deformation temperature 110℃.

[0035] Example 5: Proportion: polypropylene (PP) resin 50%, alkali-free glass fiber (GF) 30%, hydrolysis stabilizer (bis (2,2,6,6-tetramethylpiperidinyl) sebacate) 1%, heat-resistant additive (SEBS) 15%, antioxidant (tris (2,4-di-tert-butylphenyl) phosphite) 1%, processing aid (ethylene bisstearamide (EBS)) 3%.

[0036] Preparation steps: 1. Treat the alkali-free glass fiber with ethylene bisstearamide and then dry it.

[0037] 2. Add PP resin, bis(2,2,6,6-tetramethylpiperidinyl) sebacate, SEBS, and tris(2,4-di-tert-butylphenyl) phosphite to a high-speed mixer and mix at 100°C for 5 minutes.

[0038] 3. The mixed material and the treated glass fiber are blended through a twin-screw extruder, with the temperature of each section being 180-220°C and the screw speed being 300r / min. The composite material is made through melt plasticization, extrusion, cooling, pelletizing and drying.

[0039] Performance test results: tensile strength 80MPa, flexural strength 115MPa, impact strength 16kJ / m², heat deformation temperature 120℃.

[0040] Example 6: Proportion: polypropylene (PP) resin 55%, alkali-free glass fiber (GF) 28%, hydrolysis stabilizer (zinc stearate) 1%, heat-resistant additive (talc) 10%, antioxidant (1010) 1%, processing aid (silicone masterbatch) 5%.

[0041] Preparation steps: 1. Treat the alkali-free glass fiber with silicone masterbatch and then dry it.

[0042] 2. Add PP resin, zinc stearate, talc and 1010 into a high-speed mixer and mix at 85°C for 9 minutes.

[0043] 3. The mixed material and the treated glass fiber are blended through a twin-screw extruder, with the temperature of each section being 182-220° C. and the screw speed being 220 r / min. The composite material is obtained through melt plasticization, extrusion, cooling, pelletizing and drying.

[0044] Performance test results: tensile strength 78MPa, flexural strength 112MPa, impact strength 17kJ / m², heat deformation temperature 118℃.

[0045] Example 7: Proportion: polypropylene (PP) resin 60%, alkali-free glass fiber (GF) 27%, hydrolysis stabilizer (epoxy fatty acid methyl ester) 2%, heat-resistant additive (mica powder) 8%, antioxidant (168) 1%, processing aid (γ-methacryloyloxypropyltrimethoxysilane) 2%.

[0046] Preparation steps: 1. Treat the alkali-free glass fiber with γ-methacryloxypropyltrimethoxysilane and then dry it.

[0047] 2. Add PP resin, epoxy fatty acid methyl ester, mica powder and 168 into a high-speed mixer and mix at 90°C for 7 minutes.

[0048] 3. The mixed material and the treated glass fiber are blended through a twin-screw extruder, with the temperature of each section being 185-220°C and the screw speed being 280r / min. The composite material is obtained through melt plasticization, extrusion, cooling, pelletizing and drying.

[0049] Performance test results: tensile strength 75MPa, flexural strength 108MPa, impact strength 19kJ / m², heat deformation temperature 115℃.

[0050] Comparative Example (PA66+GF30%): Proportion: PA66-65%, alkali-free glass fiber (GF) 30%, antioxidant (dilauryl thiodipropionate) 0.5%, lubricant (paraffin) 2%, coupling agent (vinyltriethoxysilane) 2.5%.

[0051] Preparation steps: 1. First prepare a 3% toluene solution of vinyl triethoxysilane, immerse the alkali-free glass fiber in the solution, soak it at room temperature for 40 minutes, then take it out, place it in a ventilated place to dry, and then place it in a drying oven at 80°C to dry for 3 hours for use.

[0052] 2. Add PA66, dilauryl thiodipropionate and paraffin into a high-speed mixer, set the temperature to 85°C, and mix for 7 minutes.

[0053] 3. Add the mixed material and treated glass fiber to a twin-screw extruder. Set the extruder section temperatures to 235°C, 245°C, 255°C, 260°C, and 265°C, with a screw speed of 280 r / min. After melt plasticization, extrusion, cooling, and pelletizing, the pellets were dried at 95°C to obtain a PA66+GF30% composite material.

[0054] Performance test results: tensile strength 62MPa, flexural strength 88MPa, impact strength 9kJ / m², heat deformation temperature 102℃.

[0055] The above specific embodiments further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A highly stable glass fiber reinforced plastic composite material, characterized by: The composite material is made of the following components in percentage by weight: Polypropylene (PP) resin 45-65%; E-glass fiber (GF) 25-35%; Hydrolysis stabilizer 0.5-2%; Heat resistant additive 5-15%; Antioxidant 0.5-1%; Processing aid 0.5-1%.

2. The highly stable glass fiber reinforced plastic composite material according to claim 1, characterized in that: The hydrolysis stabilizer is one or more of a metal soap compound, a hindered amine compound or an epoxy compound; The metal soap compound is one of calcium stearate and zinc stearate, the hindered amine compound is bis(2,2,6,6-tetramethylpiperidinyl) sebacate, and the epoxy compound is one of epoxidized soybean oil and epoxy fatty acid methyl ester; The heat-resistant additives include toughening agents and high-temperature-resistant modifiers; The toughening agent is one or more of ethylene-propylene dimer (EPDM), ethylene-octene copolymer (POE) and hydrogenated styrene-butadiene block copolymer (SEBS), and the high-temperature resistant modifier is one or more of talc powder and mica powder.

3. The highly stable glass fiber reinforced plastic composite material according to claim 1, characterized in that: The antioxidant is a complex of a phenolic antioxidant and a phosphite antioxidant; The phenolic antioxidant is one of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester (1010) and dioctadecylpentaerythritol diphosphite (168), and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl)phosphite; The processing aid is a lubricant or a coupling agent; The lubricant is selected from one of stearic acid, ethylene bisstearamide (EBS) and silicone masterbatch, and the coupling agent is γ-methacryloxypropyltrimethoxysilane, which is used for surface treatment of alkali-free glass fiber.

4. The high-stability glass fiber reinforced plastic composite material according to claim 1, characterized in that: The composite material is prepared by the following steps: S1. Treating the alkali-free glass fiber with a processing aid and drying it for later use; S2. Add PP resin, hydrolysis stabilizer, heat-resistant additive, and antioxidant into a high-speed mixer and mix at 80-100°C for 5-10 minutes; S3. Blending the mixed material with the treated glass fiber through a twin-screw extruder, with the temperature of each section of the extruder being 180-220° C. and the screw speed being 200-300 r / min, and performing melt plasticization, extrusion, cooling, pelletizing, and drying to obtain the composite material.

5. A high-stability glass fiber reinforced plastic composite automotive pipe quick connector according to any one of claims 1 to 4, comprising a plug (1), one end of the plug (1) being mounted with one end of a connector (2), and the other end of the connector (2) being fixedly connected to a pipe connector (3), characterized in that: A positioning block (4) is fixedly provided on the upper surface of the end of the plug (1) connected to the connector (2), and a first reinforcing rib (5) is provided on the outer surface of the plug (1) on the side of the positioning block (4) away from the connector (2); a clamping block (6) is fixedly provided on the lower surface of the end of the plug (1) connected to the connector (2), and a second reinforcing rib (7) is provided on the outer surface of the plug (1) on the side of the clamping block (6) away from the connector (2); a positioning groove (9) is provided on the inner upper surface of the end of the connector (2) connected to the plug (1), and a clamping groove (10) is provided on the inner lower surface of the end of the connector (2) connected to the plug (1), and a third reinforcing rib (11) is fixedly provided on the outer surface of the connector (2) opposite to the positioning groove (9) and the clamping groove (10).

6. The automotive pipe quick-connect connector made of a highly stable glass fiber reinforced plastic composite material according to claim 5, characterized in that: Anti-slip grooves (8) are provided on both outer surfaces of the plug (1), a rotating shaft (13) is mounted on the outer surface of the lower end of the connector (2), a locking rod (14) is fixedly connected to the upper end of the shaft (13), and a rebound plate (15) is fixedly provided on the side surface of one end of the locking rod (14) connected to the shaft (13).

7. The automotive pipe quick-connect connector made of a highly stable glass fiber reinforced plastic composite material according to claim 5, characterized in that: The connection between the connector (2) and the pipe joint (3) is arc-shaped, and the connector (2) and the pipe joint (3) are L-shaped as a whole.

8. The automotive pipe quick-connect connector made of a highly stable glass fiber reinforced plastic composite material according to claim 5, characterized in that: The positioning block (4) is fixedly connected to one end facing the first reinforcing rib (5), the clamping block (6) is fixedly connected to one end facing the second reinforcing rib (7), and the positioning block (4) and the clamping block (6) are symmetrically arranged on both sides of the central axis of the connector (2). The plug (1) is mounted by engaging with the connector (2) through the positioning block (4) and the positioning groove (9), and the plug (1) is mounted by engaging with the connector (2) through the clamping block (6) and the clamping groove (10).

9. The automotive pipe quick-connect connector made of a highly stable glass fiber reinforced plastic composite material according to claim 6, characterized in that: The anti-slip groove (8) is designed to be arc-shaped, and the anti-slip groove (8) is symmetrically arranged on the outer surface of the plug (1) on both sides of the positioning block (4); the locking rod (14) is designed to be arc-shaped, and the locking rod (14) passes through the clearance groove (12), and one end of the locking rod (14) is located inside the connector (2) and is engaged with the anti-slip groove (8).

10. The automotive pipe quick-connect connector made of a highly stable glass fiber reinforced plastic composite material according to claim 6, characterized in that: The rebound plate (15) is symmetrically arranged on both sides of the lower end of the locking rod (14), and a spring is connected between the rebound plate (15) and the outer surface of the connecting head (2).

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