A fully recyclable aluminum-plastic-based multi-component composite co-extrusion material and its production process

Abstract

The present invention provides a fully recyclable aluminum-plastic-based multi-component composite co-extrusion material and its production process, which belongs to the technical field of aluminum-plastic-based material production. It solves the technical problems that the existing aluminum-plastic composite materials cannot be fully recycled, have low structural strength and lack multifunctionality. The aluminum-plastic-based multi-component composite co-extrusion material is composed of a modified plastic surface layer, an interface bonding layer and an aluminum core layer from the outside to the inside. The preparation process includes the following steps: aluminum material processing, conveying and preheating; fiber bundle supply line traction and infiltration; wire bundle co-extrusion; modified plastic co-extrusion, molding, cutting and finished product transportation. The present invention prepares the composite material through the process of automatic positioning and conveying, fiber bundle supply line traction and infiltration, wire bundle co-extrusion and modified plastic co-extrusion, cooling molding, cutting and finished product transportation. The composite material has low energy consumption, good extrusion effect, high preparation efficiency, more stable finished product quality, good structural strength, high stability, multifunctionality, meets diversified use needs, and can be fully recycled.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum-plastic-based material production, and relates to an aluminum-plastic-based multi-component composite co-extrusion material that can be fully recycled and a production process thereof. Background Art

[0002] Aluminum-plastic composite materials, commonly known as aluminum-plastic composite materials or aluminum-plastic panels, are a new type of composite material that combines the properties of metals and non-metals. Aluminum-plastic composite materials have the advantages of light weight, high strength, corrosion resistance and easy processing. These advantages have enabled aluminum-plastic composite materials to be used in construction, packaging, transportation and other fields, and have shown good development prospects. However, aluminum-plastic composite materials have problems such as low bonding strength, easy delamination, difficulty in recycling and lack of versatility, which limits product quality and application range.

[0003] The reason is that, on the one hand, the existing hot pressing process for preparing aluminum-plastic composite materials is relatively simple, which is just a simple gluing, lamination and other processes to hot press the aluminum foil and plastic film together. This process has high energy consumption, low preparation efficiency, poor pressing effect, and the prepared composite material has low structural strength and poor stability. On the other hand, most of the existing aluminum-plastic composite materials have single functions, poor structural strength, and cannot be fully recycled, making it difficult to meet the users' diversified needs for light weight, high strength, corrosion resistance, heat insulation, beautiful appearance, easy processing, environmental protection and energy saving.

[0004] Therefore, we propose an aluminum-plastic-based multi-component composite co-extrusion material and its production process. This aluminum-plastic-based multi-component composite co-extrusion material has good structural strength, high stability, and versatility, meets diversified usage needs, is highly safe, and can be separated layer by layer and fully recycled. This preparation process has low energy consumption, good extrusion effect, high preparation efficiency, and more stable finished product quality. The production mold used in this application can automatically position and transport aluminum materials, and preheat the aluminum materials. It can pull the fiber bundle supply line to infiltrate and adjust the supply of the infiltrating material. It can evenly co-extrude the wire bundle to ensure the stability of the finished product quality. It can perform efficient modified plastic co-extrusion, rapid cooling and molding, and liquid cooling circulation with low energy consumption. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a fully recyclable aluminum-plastic-based multi-component composite co-extrusion material and its production process. The technical problem to be solved by the invention is: how to prepare a fully recyclable aluminum-plastic-based multi-component composite co-extrusion material with high structural strength and multifunctionality through the process of aluminum material processing, conveying and preheating, fiber bundle supply line traction and infiltration, wire bundle co-extrusion, modified plastic co-extrusion, molding, cutting and finished product transportation.

[0006] One object of the present invention is to provide a fully recyclable aluminum-plastic-based multi-component composite co-extruded material, wherein the aluminum-plastic-based multi-component composite co-extruded material is composed of a modified plastic surface layer, an interface bonding layer and an aluminum core layer from the outside to the inside;

[0007] The modified plastic surface layer is prepared from 60 to 85 parts by weight of a polyolefin matrix, 10 to 25 parts by weight of an ion polymer, 0.5 to 5 parts by weight of a nano-metal oxide, 0.1 to 0.5 parts by weight of an antioxidant and 0.3 to 1.0 parts by weight of an ultraviolet absorber, and has a thickness of 0.5 to 2.5 mm.

[0008] The interface bonding layer is composed of biomass fiber bundles arranged in parallel along the extrusion direction and Vitrimer materials containing a thermally reversible covalent cross-linked network, and has a thickness of 0.2 to 1.5 mm.

[0009] The aluminum core layer is a shaped or non-shaped cavity or solid core structure substrate made of aluminum or aluminum alloy, with a width of 30 to 600 mm and a thickness of 4 to 80 mm.

[0010] Preferably, the polyolefin in the modified plastic surface layer is selected from at least one of high-density polyethylene, low-density polyethylene, linear low-density polyethylene, heat-resistant polyethylene, polypropylene and polystyrene; the ion polymer is selected from at least one of sodium ion polymers (Surlyn8920, 8528, 8320, 8020, 1601-2), zinc ion polymers (Surlyn9721, 9945, 9910, 9520, 9320, 9120) and lithium sodium ion polymers (Surlyn7940); the nano metal oxide is at least one of nano titanium dioxide, nano aluminum oxide and nano zinc oxide; the antioxidant is at least one of antioxidants 1010, 168, 1076, B225, B215, B900, HostanoxP-EPQ, PW-9225B, PS802FL and PS800, and the ultraviolet absorber is at least one of benzotriazoles, benzophenones and hindered amines.

[0011] Preferably, the biomass fiber bundle is made by twisting at least one of wood, bamboo, cotton and linen fibers into bundles, and the diameter of the fiber bundle is 0.1 to 1.0 mm.

[0012] Preferably, the Vitrimer material containing a thermally reversible covalent cross-linked network is composed of 30 to 50 parts by mass of a Vitrimer material mainly composed of polyolefin, 10 to 25 parts by mass of a Vitrimer material mainly composed of ethylene-vinyl acetate copolymer (EVA), and 25 to 60 parts by mass of ethylene-vinyl acetate copolymer grafted with maleic anhydride (EVA-MA).

[0013] Preferably, the Vitrimer material with HDPE (polyolefin) as the main body is prepared by grafting high-density polyethylene with dioxaborolene, introducing active reaction points of dioxaborolane on the carbon-carbon single bond skeleton, and then reacting the active reaction points with bis-dioxaborolane through a double decomposition reaction.

[0014] Preferably, the Vitrimer material with EVA (ethylene-vinyl acetate copolymer) as the main component is PEVA prepared by cross-linking EVA with DCP (dicumyl peroxide).

[0015] The Vitrimer material is impregnated and compounded with the fiber bundle when passing through the co-extrusion flow channel of the impregnation compounding part, and then merged with the aluminum material and the surface modified plastic in the extrusion die (9). The impregnated biomass fiber bundles are formed into sheets under the melt pressure of the modified plastic, so that the Vitrimer materials are connected to each other to form an interface bonding layer.

[0016] The softening temperature of the modified plastic surface layer is 80-120°C, and the thermal reversible conversion temperature of the covalent cross-linked network of the Vitrimer material in the interface bonding layer is 130-160°C. The modified plastic surface layer and the interface bonding layer can be separated layer by layer through step temperature treatment, thereby realizing the full recycling of aluminum-plastic based multi-component composite co-extrusion materials.

[0017] Another object of the present invention is to provide a production process for a fully recyclable aluminum-plastic-based multi-component composite co-extrusion material, comprising the following production steps:

[0018] Step 1: Aluminum material processing, conveying and preheating: Use plasma to treat the surface of the aluminum material to achieve cleaning and decontamination to enhance adhesion, and then use a traction feeder to feed the aluminum material into the guide mold mechanism at a uniform speed;

[0019] Step 2, fiber bundles are pulled and impregnated by supply wire: a plurality of biomass fiber bundles enter into the guide die mechanism; the uniformly mixed Vitrimer material is placed in the extruder I for extrusion, and the Vitrimer material enters into the guide die mechanism to impregnate the plurality of biomass fiber bundles;

[0020] Step 3, wire bundle co-extrusion: compounding with several impregnated biomass fiber bundles on the surface of aluminum material through a guide die mechanism;

[0021] Step 4, co-extrusion of modified plastics, cooling and molding, waste cutting and finished product transportation: the uniformly mixed modified plastics are placed in an external extruder II for extrusion, and composited with the aluminum material, several biomass fiber bundles and Vitrimer materials in step 3 through an extrusion die, and then enter a cooling and molding die for molding to prepare an aluminum-plastic composite material.

[0022] Preferably, the production mold used in step one and step four includes a base, both ends of the base are provided with a traction feeder, the two traction feeders are symmetrically arranged, and the base is provided with a wire supply guide mechanism, a guide die mechanism, an extrusion die, a cooling and shaping die, two symmetrically arranged cutter mechanisms and a wire harness traction mechanism from back to front, the wire supply guide mechanism, the guide die mechanism, the extrusion die, the cooling and shaping die, the two symmetrically arranged cutter mechanisms and the wire harness traction mechanism are located between the two traction feeders, the guide die mechanism and the extrusion die are detachably connected, the extrusion die is detachably connected to the cooling and shaping die, the guide die mechanism and the external extruder I are connected by a pipeline, the extrusion die is connected to the external extruder II by a pipeline, a heating box, a water pump, a water tank and a cooler are provided on the side of the base, the water tank, the water pump, the cooler, the cooling and shaping die, the heating box and the guide die mechanism are connected in sequence by pipelines, and the water tank and the guide die mechanism are connected by pipelines to form a liquid cooling circulation system.

[0023] With the above structure, the staff pulls out a number of biomass fiber bundles from the supply wire guide mechanism and arranges them in order. Then, after passing through the guide die mechanism, the extrusion die and the cooling and shaping die in the arranged order, the staff winds the several biomass fiber bundles on the corresponding wire bundle traction mechanism. Then, the equipment is debugged and the water pump is started. The water pump draws water out of the water tank and pumps it into the cooler. After cooling in the cooler, the water is transported to the cooling and shaping die. Then, the water is transported from the cooling and shaping die to the heating box. After being heated in the heating box, the water is transported to the guide die mechanism. The guide die mechanism is heated to form a preheating zone. Then, the water is transported from the guide die mechanism to the water tank to form a water cycle.

[0024] Then the staff put the processed aluminum materials on the traction feeder on the rear side in turn. The traction feeder clamps the aluminum materials and transports the aluminum materials. The aluminum materials pass through the middle position of the wire guide mechanism and enter the preheating area of ​​the guide die mechanism. The preheating area of ​​the guide die mechanism preheats the aluminum materials. The aluminum materials continue to move toward the front side of the guide die mechanism. During the movement, the external extruder I squeezes the Vitrimer material into the guide die mechanism. The Vitrimer material infiltrates several biomass fiber bundles. The aluminum materials continue to move and contact the infiltrated biomass fiber bundles. The Vitrimer material and the infiltrated biomass fiber bundles are compounded on the surface of the aluminum materials. While in contact, the wire bundle traction mechanism pulls several biomass fiber bundles, so that several biomass fiber bundles move synchronously with the aluminum materials. When the aluminum materials reach the extrusion die, the external extruder I squeezes the molten modified plastic into the extrusion die. When the aluminum materials pass through, the molten modified plastic is squeezed between the Vitrimer material and the infiltrated The aluminum-plastic composite material is placed on the composite surface of a plurality of biomass fiber bundles, and the Vitrimer material and the soaked biomass fiber bundles are formed into sheets, so that the Vitrimer materials are connected to each other to form an interface bonding layer, and the molten modified plastic is bonded on the interface bonding layer to form a modified plastic layer. The aluminum material, the interface bonding layer and the modified plastic layer are combined to form an aluminum-plastic composite material. Then the aluminum-plastic composite material continues to move into a cooling and shaping mold, and continues to move after being cooled and shaped by the cooling and shaping mold, and enters under two cutting knife mechanisms. The two cutting knife mechanisms move downward to cut off a plurality of biomass fiber bundles, Vitrimer materials and modified plastics that are not composited on the aluminum material at the end of the aluminum-plastic composite material, that is, to cut off excess materials, and the waste is transported out from the base. After cutting, the wire harness traction mechanism tractions and rolls up the broken wire harness, and then stops moving. The aluminum-plastic composite material continues to move to the traction feeder on the front side, and the traction feeder on the front side clamps the aluminum-plastic composite material and transports it out;

[0025] After the excess material between the two adjacent ends of the aluminum-plastic composite material enters below the two cutting knife mechanisms, the two cutting knife mechanisms move downward to cut off the excess material, and the waste material falls down and is transported out.

[0026] The base is provided with two mounting frames one, and the base is provided with mounting frame four, mounting frame three and mounting frame two in sequence, and mounting frame four, mounting frame three and mounting frame two are located between the two mounting frames one, and mounting frame two is fixedly connected to mounting frame three, and an avoidance channel is formed between mounting frame three and mounting frame four, and an upper end surface of mounting frame two is provided with a blanking opening, and a discharging opening is provided on the side of mounting frame two, and the blanking opening is connected with the discharging opening, and a blanking slope is provided inside the mounting frame two, and the bottom end of the blanking slope extends to the bottom of the discharging opening, and four stoppers are symmetrically arranged in pairs on the upper end surface of mounting frame two, and the four stoppers are grouped in pairs, respectively, and are located at the front and rear sides of mounting frame two, and the distance between the two stoppers on the same side is equal to the width of the aluminum-plastic composite material, and support plates are provided between the two stoppers on the left side and between the two stoppers on the right side, and the support plates are located above the blanking slope, and the stoppers and the support plates both form a cutter avoidance opening, and the distance between the two stoppers on the same side of the front and rear is the same as the distance between two adjacent aluminum materials.

[0027] With the above structure, when the excess material at the end of the aluminum-plastic composite material is cut off, the waste material falls from the blanking port onto the blanking slope, slides down the blanking slope, is transported to an external trolley through the discharge port, and is subsequently recovered by the staff. When the stopper is used to cut the excess material, it abuts against the left and right sides of the end of the aluminum-plastic composite material to prevent excess uncompounded material from remaining. The support plate is used to support the aluminum-plastic composite material during cutting. The avoidance channel facilitates pipeline connection, and the cutter avoidance port facilitates the movement of the cutter.

[0028] The traction feeder includes a mounting frame five, an electric screw and two fixed seats. The mounting frame five is fixed to the end of the base, one of the fixed seats is fixed to the inner side of the upper end of the mounting frame five, a plurality of guide rods are arranged on the inner side of the upper end of the mounting frame five, and the other fixed seat is slidably arranged on the plurality of guide rods. The mounting frame five is provided with an electric screw, which is transmission-connected with the other fixed seat. A driving motor one is arranged inside the mounting frame five, and a plurality of rotating rollers are rotatably arranged on the fixed seats. Conveyor belts are arranged outside the plurality of rotating rollers of the two fixed seats, and the output shaft of the driving motor one is transmission-connected with the rotating shaft of one of the rotating rollers of the two fixed seats, and a supporting ring is arranged at the bottom of the two conveyor belts.

[0029] With the above structure, when conveying aluminum materials, the electric screw drives another fixed seat to move, so that the two fixed seats are close to each other, and the two conveyor belts cooperate with each other to clamp the aluminum materials. Then, the output shaft of the driving motor 1 rotates to drive the rotating shaft of the rotating roller at the corresponding position to rotate, thereby driving the two conveyor belts to move, conveying the aluminum materials, and the supporting ring supports the aluminum materials.

[0030] The wire supply guide mechanism includes a table frame 1, the rear side of the table frame 1 is fixed on the mounting frame 1, coil frames 1 are provided at the upper and lower ends of the rear side of the table frame 1, coil frames 2 are provided at the left and right ends of the rear side of the table frame 1, a number of fiber bundle coils are provided on the coil frames 1 and 2, guide rollers 1 are provided at the upper and lower ends of the front side of the table frame 1, guide rollers 2 are provided at the left and right ends of the front side of the table frame 1, and a number of guide grooves are provided on the guide rollers 1 and 2.

[0031] With the above structure, the staff pulls out a number of biomass fiber bundles from the fiber bundle coils on the two coil frames 1 and 2, arranges them in order, guides them through a number of guide grooves on the corresponding guide rollers 1 and 2, and enters the guide mold mechanism.

[0032] The wire harness traction mechanism includes a bench frame 2, which is fixed on a mounting frame 1 on the front side, and a wire harness traction roller 1 is rotatably provided on the upper and lower sides of the rear end of the bench frame 2. Two drive motors 2 are fixed to the side of the rear end of the bench frame 2, and the output shafts of the two drive motors 2 are fixedly connected to the wire harness traction roller 1 at the corresponding positions, and two mounting plates are provided on the left and right sides of the rear end of the bench frame 2, and the two mounting plates on the same side are located between the two wire harness traction rollers 1, and a wire harness traction roller 2 is rotatably provided between the two mounting plates on the same side, and a drive motor 3 is fixed to the side of one of the two mounting plates on the same side, and the output shafts of the drive motor 3 are fixedly connected to the wire harness traction roller 2.

[0033] With the above structure, the output shafts of the two drive motors 2 rotate to drive the wire harness traction rollers 1 at the corresponding positions to move and traction the wire harnesses, and the output shafts of the drive motors 3 rotate to drive the wire harness traction rollers 2 at the corresponding positions to move and traction the wire harnesses.

[0034] The cutter mechanism comprises a mounting frame six, which is fixed on the mounting frame two, and an electric push rod is arranged on the mounting frame six, and a wedge-shaped cutter is fixed below the telescopic end of the electric push rod, and the distance between the wedge-shaped cutters of the two cutter mechanisms is equal to the distance between the two blocks, and the wedge-shaped cutter is located above the blanking port.

[0035] With the above structure, the telescopic end of the electric push rod drives the wedge-shaped cutter to move downward to cut off the excess material at the end of the aluminum-plastic composite material.

[0036] The guide die mechanism comprises a guide die mechanism body, which is fixed on a mounting frame 4, an aluminum channel 2 is arranged inside the guide die mechanism body, an aluminum preheating part is arranged on the rear side of the guide die mechanism body, an aluminum channel 1 is arranged inside the aluminum preheating part, the aluminum channel 1 is located on the rear side of the aluminum channel 2, the aluminum channel 1 is connected with the aluminum channel 2, and the aluminum channel 1 passes through the aluminum preheating part and extends into the guide die mechanism body, the sum of the width of the aluminum channel 1 and twice the diameter of the biomass fiber bundle is equal to the width of the aluminum channel 2, the sum of the thickness of the aluminum channel 1 and twice the diameter of the biomass fiber bundle is equal to the thickness of the aluminum channel 2, a plurality of preheating pipes are arranged on the aluminum preheating part, the water inlets of the plurality of preheating pipes are connected to the water outlets of the heating box by pipes, the water outlets of the plurality of preheating pipes are connected to the water inlet of the water tank by pipes, a plurality of feed pipes 1 are arranged on the upper and lower sides of the guide die mechanism body, and a feed pipe 1 is arranged on the left and right sides of the guide die mechanism body, One end of the material pipe 1 is connected to the external extruder Ⅰ through a pipeline, the feed pipe 1 extends into the interior of the guide mold mechanism body, and the other end of the feed pipe 1 is provided with an inclined flow channel 1, and a plurality of fiber bundle channels are provided on the rear side of the guide mold mechanism body, and the plurality of fiber bundle channels are located on the four outer sides of the aluminum channel 1. The fiber bundle channel is divided into a horizontal section and an inclined section, and is located inside the guide mold mechanism body. The inclined sections of the plurality of fiber bundle channels are connected with the inclined flow channel 1 on the same side, and the ends of the inclined flow channel 1 are connected with the aluminum channel 1 and the aluminum channel 2. A plurality of check holes are provided on the four sides of the guide mold mechanism body, and the check holes are connected with the horizontal section ends of the fiber bundle channels at the corresponding positions. Check plugs are detachably provided in the check holes, and the check plugs are made of a pressurized expansion material, and the pressurized expansion material is one of expanded graphite or liquid crystal elastomer. The ends of the check plugs are arranged in the corresponding fiber bundle channels, and the ends of the check plugs are provided with fiber bundle passage holes.

[0037] With the above structure, water heated by the heating box enters a plurality of preheating pipes to heat the aluminum preheating part to form an aluminum preheating zone. After the aluminum enters the aluminum preheating part from the aluminum channel 1, it moves toward the front side of the guide die mechanism body after being preheated in the aluminum preheating zone. During the movement, the external extruder I squeezes the Vitrimer material into the feed pipe 1 through the pipeline. The Vitrimer material squeezes into the inclined flow channel 1 through the feed pipe 1, and soaks a plurality of biomass fiber bundles in the inclined flow channel 1. When the aluminum passes through the end of the inclined flow channel 1, the Vitrimer material and the soaked biomass fiber bundles are compounded on the surface, and then the aluminum moves synchronously to the aluminum channel 2 on the front side.

[0038] When the Vitrimer material is squeezed in, the Vitrimer will flow along several fiber bundle channels and reach the end of the check plug, thereby pressurizing the check plug. The check plug expands and squeezes several biomass fiber bundles under pressure. Several biomass fiber bundles are subjected to pressure resistance in the passage hole. The check plug detects the pressure resistance to adjust the feed amount of the Vitrimer material in the Vitrimer material infiltration composite part.

[0039] The extrusion die comprises an extrusion die body, which is connected to a guide die mechanism body by bolts, an aluminum channel 2 and an aluminum channel 3 are arranged inside the extrusion die body, the aluminum channel 2 inside the extrusion die body is connected to the aluminum channel 2 inside the guide die mechanism body, the aluminum channel 2 inside the extrusion die body is connected to the aluminum channel 3 and is located at the rear side of the aluminum channel 3, the sum of the width of the aluminum channel 2 and twice the diameter of the biomass fiber bundle is equal to the width of the aluminum channel 3, the sum of the thickness of the aluminum channel 2 and twice the diameter of the biomass fiber bundle is equal to the thickness of the aluminum channel 3, a plurality of feed pipes 2 are arranged on the upper and lower sides of the extrusion die body, a feed pipe 2 is arranged on the left and right sides of the extrusion die body, one end of the feed pipe 2 is connected to an external extruder II through a pipeline, the feed pipe 2 extends into the interior of the extrusion die body, the other end of the feed pipe 2 is provided with an inclined flow channel 2, and the inclined flow channel 2 is connected to the aluminum channel 3.

[0040] With the above structure, the aluminum material enters the extrusion die body through the aluminum material channel 2. At the same time, the external extruder I squeezes the molten modified plastic into all the feed pipes 2 through the pipeline, and squeezes it into the inclined flow channel 2 through all the feed pipes 2. When the aluminum material passes through, in the aluminum material channel 3, the molten modified plastic is squeezed on the composite surface of the Vitrimer material and the several infiltrated biomass fiber bundles, and the Vitrimer material and the several infiltrated biomass fiber bundles are formed into sheets, so that the Vitrimer material is connected to each other to form an interface bonding layer, and the molten modified plastic is bonded above the interface bonding layer to form a modified plastic layer. The aluminum material, the interface bonding layer and the modified plastic layer are combined to form an aluminum-plastic composite material, which is transported out and then enters the cooling and shaping die.

[0041] The cooling and shaping mold is fixed on the mounting frame three, and a plurality of cooling pipes are arranged on the cooling and shaping mold. An aluminum channel three is arranged inside the cooling and shaping mold. The water inlets of the plurality of cooling pipes are connected to the water outlets of the cooler through pipes, and the water outlets of the plurality of cooling pipes are connected to the water inlet of the heating box through pipes.

[0042] With the above structure, the aluminum-plastic composite material enters from the aluminum material channel 3 of the cooling and shaping mold, and the cooling water enters the cooling and shaping mold from the water inlets of the cooling pipes. The cooling water takes away the heat on the aluminum-plastic composite material to cool and shape the aluminum-plastic composite material. The heated water enters the heating box from the water outlets of the cooling pipes, thereby reducing energy consumption.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The aluminum-plastic-based multi-component composite co-extruded material of the present invention has good structural strength, high stability, and multifunctionality, can meet diversified usage requirements, has high safety, and can be separated layer by layer and fully recycled.

[0045] This preparation process has low energy consumption, good extrusion effect, high preparation efficiency and more stable finished product quality.

[0046] In the production process of the present invention, the production mold used can sequentially perform the following tasks: automatic positioning and conveying, fiber bundle supply line traction and infiltration, bundle co-extrusion, modified plastic co-extrusion, cooling and molding, waste material cutting and finished product conveying. The two traction feeders cooperate to clamp and convey the aluminum material and convey the formed aluminum-plastic composite material to complete the automatic conveying.

[0047] Through the coordination of the wire supply guide mechanism and the wire harness traction mechanism, the wire supply guide mechanism supplies a number of biomass fiber bundles, and the wire harness traction mechanism tractions a number of biomass fiber bundles, and cooperates with the aluminum-plastic composite material to move synchronously, so that a number of biomass fiber bundles are evenly arranged on the surface of the aluminum material to ensure stable quality. Through the coordination of the guide die mechanism and the extruder I, the Vitrimer material and a number of biomass fiber bundles are compounded on the surface of the aluminum material, and the supply of the Vitrimer material is automatically adjusted, which is convenient and efficient, and ensures product quality.

[0048] The guide die mechanism cooperates with the external extruder II and the extrusion die to compound the molten modified plastic on the Vitrimer material and a number of biomass fiber bundles to form an aluminum-plastic composite material with high preparation efficiency and good extrusion effect.

[0049] The water pump cooperates with the cooler, cooling and shaping mold, heating box, guide mold mechanism and water tank to quickly cool the cooling and shaping mold and aluminum-plastic composite material, heat the guide mold mechanism, and form a liquid cooling circulation system with low energy consumption. The base cooperates with two cutting knife mechanisms to cut off the material at the end of the aluminum-plastic composite material to ensure product quality and facilitate recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the preparation process of the present invention.

[0051] Figure 2 It is a three-dimensional structural schematic diagram of the production mold in the present invention.

[0052] Figure 3 It is a three-dimensional structural schematic diagram of the base in the present invention.

[0053] Figure 4 It is a three-dimensional structural schematic diagram of the traction feeder in the present invention.

[0054] Figure 5 It is a three-dimensional structural schematic diagram of the wire supply guide mechanism in the present invention.

[0055] Figure 6 It is a three-dimensional structural schematic diagram of the wire harness traction mechanism in the present invention.

[0056] Figure 7 It is a three-dimensional structural schematic diagram of the cutter mechanism in the present invention.

[0057] Figure 8 It is a three-dimensional structural schematic diagram of the guide mold mechanism in the present invention.

[0058] Fig. 9 It is a partial cross-sectional structural schematic diagram of the guide mold mechanism in the present invention.

[0059] Fig.10 It is a three-dimensional structural schematic diagram of the extrusion die in the present invention.

[0060] Fig.11 It is a partial cross-sectional structural schematic diagram of the extrusion die in the present invention.

[0061] Fig.12 It is a schematic diagram of the interfacial peeling force test in the present invention.

[0062] Fig.13 It is a schematic cross-sectional view of a product of a composite co-extrusion material prepared by the present invention.

[0063] Fig.14 This is a table of interface bonding strength test results of Examples 1-4 and Comparative Examples 1-4 in the present invention.

[0064] Fig.15 This is a table showing the test results of the cold and hot cycle resistance of Examples 1-4 and Comparative Examples 1-4 in the present invention.

[0065] Fig.16 This is a table showing the room temperature and 80°C bending performance test results of Examples 1-4 and Comparative Examples 1-4 in the present invention.

[0066] Fig.17 This is a table showing the test results of the interfacial peeling force at 110°C and 140°C for Examples 1-4 and Comparative Examples 1-4 of the present invention.

[0067] In the figure, 1, base; 2, wire supply guide mechanism; 3, water tank; 4, cutter mechanism; 5, wire harness traction mechanism; 6, cooler; 7, traction feeder; 8, cooling and shaping die; 9, extrusion die; 10, guide die mechanism; 11, heating box; 12, water pump; 13, mounting frame 1; 14, mounting frame 2; 15, mounting frame 3; 16, mounting frame 4; 17, stopper; 18, material falling slope; 19, support plate; 20, conveyor belt; 21, support ring; 22, electric screw; 23, mounting frame 5; 24, drive motor 1; 25, fixed seat; 26, rotating roller; 27, table frame 1; 28, guide roller 1; 29, coil frame 1; 30, coil frame 2; 31. Guide roller 2; 32. Table frame 2; 33. Wire harness traction roller 1; 34. Wire harness traction roller 2; 35. Drive motor 2; 36. Drive motor 3; 37. Electric push rod; 38. Mounting frame 6; 39. Wedge cutter; 40. Guide die mechanism body; 41. Feed pipe 1; 42. Check plug; 43. Fiber bundle channel; 44. Preheating tube; 45. Aluminum channel 1; 46. Aluminum preheating section; 47. Inclined flow channel 1; 48. Feed pipe 2; 49. Extrusion die body; 50. Aluminum channel 2; 51. Inclined flow channel 2; 52. Aluminum channel 3; A. Modified plastic surface; B. Aluminum substrate; C. Biomass fiber bundle; D. Interface bonding layer. DETAILED DESCRIPTION

[0068] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0069] The fully recyclable aluminum-plastic-based multi-component composite co-extrusion material of the present invention comprises, from the outside to the inside, a modified plastic surface layer, an interface bonding layer and an aluminum core layer;

[0070] The modified plastic surface layer is prepared from 60 to 85 parts by weight of a polyolefin matrix, 10 to 25 parts by weight of an ion polymer, 0.5 to 5 parts by weight of a nano-metal oxide, 0.1 to 0.5 parts by weight of an antioxidant and 0.3 to 1.0 parts by weight of an ultraviolet absorber, and has a thickness of 0.5 to 2.5 mm.

[0071] The interface bonding layer is composed of biomass fiber bundles arranged in parallel along the extrusion direction and Vitrimer materials containing a thermally reversible covalent cross-linked network, and has a thickness of 0.2 to 1.5 mm.

[0072] The aluminum core layer is a shaped or non-shaped cavity or solid core structure substrate made of aluminum or aluminum alloy, with a width of 30 to 600 mm and a thickness of 4 to 80 mm.

[0073] The polyolefin in the modified plastic surface layer is selected from at least one of high-density polyethylene, low-density polyethylene, linear low-density polyethylene, heat-resistant polyethylene, polypropylene and polystyrene; the ion polymer is selected from at least one of sodium ion polymer (Surlyn8920, 8528, 8320, 8020, 1601-2), zinc ion polymer (Surlyn9721, 9945, 9910, 9520, 9320, 9120) and lithium sodium ion polymer (Surlyn7940); the nano metal oxide is at least one of nano titanium dioxide, nano aluminum oxide and nano zinc oxide; the antioxidant is at least one of antioxidants 1010, 168, 1076, B225, B215, B900, HostanoxP-EPQ, PW-9225B, PS802FL and PS800; the ultraviolet absorber is at least one of benzotriazoles, benzophenones and hindered amines.

[0074] The biomass fiber bundle is made by twisting at least one of wood, bamboo, cotton and hemp fibers into bundles, and the diameter of the fiber bundle is 0.1-1.0 mm.

[0075] The Vitrimer material containing a thermally reversible covalent cross-linked network is composed of 30 to 50 parts by weight of a Vitrimer material mainly composed of polyolefin, 10 to 25 parts by weight of a Vitrimer material mainly composed of ethylene-vinyl acetate copolymer (EVA) and 25 to 60 parts by weight of ethylene-vinyl acetate copolymer grafted with maleic anhydride (EVA-MA).

[0076] The Vitrimer material with HDPE (polyolefin) as the main body is prepared by grafting dioxaborolene on high-density polyethylene, introducing the active reaction point of dioxaborolane on the carbon-carbon single bond skeleton, and then reacting the active reaction point with bis-dioxaborolane through a double decomposition reaction.

[0077] The Vitrimer material, which is based on EVA (ethylene-vinyl acetate copolymer), is PEVA made by cross-linking EVA with DCP (dicumyl peroxide).

[0078] The Vitrimer material is impregnated and compounded with the fiber bundle when passing through the co-extrusion flow channel of the impregnation compounding section, and then merged with the aluminum material and the surface modified plastic in the extrusion die (9). The impregnated biomass fiber bundles are formed into sheets under the melt pressure of the modified plastic, so that the Vitrimer materials are connected to each other to form an interface bonding layer.

[0079] The softening temperature of the modified plastic surface layer is 80-120°C, and the thermal reversible conversion temperature of the covalent cross-linked network of the Vitrimer material in the interface bonding layer is 130-160°C. Through step temperature treatment, the modified plastic surface layer and the interface bonding layer can be separated layer by layer, realizing the full recycling of aluminum-plastic based multi-composite co-extrusion materials.

[0080] like Figure 1 As shown, the production process of the fully recyclable aluminum-plastic-based multi-component composite co-extrusion material of the present invention has the following specific production steps:

[0081] Step 1: Preheating the aluminum material by processing and conveying: using plasma to treat the surface of the aluminum material to achieve cleaning and decontamination, so as to enhance adhesion, and then using the traction feeder 7 to feed the aluminum material into the guide die mechanism 10 at a uniform speed;

[0082] Step 2, fiber bundle supply line traction impregnation: a plurality of biomass fiber bundles enter the guide die mechanism 10; the uniformly mixed Vitrimer material is placed in the extruder I for extrusion, and the Vitrimer material enters the guide die mechanism 10 to impregnate the plurality of biomass fiber bundles;

[0083] Step 3, wire bundle co-extrusion: compounding with a plurality of impregnated biomass fiber bundles on the surface of the aluminum material through the guide die mechanism 10;

[0084] Step 4, co-extrusion of modified plastics, cooling and molding, waste cutting and finished product transportation: the uniformly mixed modified plastics are placed in an external extruder II for extrusion, and composited with the aluminum material, a plurality of biomass fiber bundles and Vitrimer materials in step 3 through an extrusion die 9, and then enter the cooling and molding die 8 for molding to prepare an aluminum-plastic composite material.

[0085] like Figure 2-Figure 11As shown, the production mold used in step 1 and step 4 includes a base 1, both ends of the base 1 are provided with a traction feeder 7, the two traction feeders 7 are symmetrically arranged, and the base 1 is provided with a wire supply guide mechanism 2, a guide die mechanism 10, an extrusion die 9, a cooling and shaping die 8, two symmetrically arranged cutter mechanisms 4 and a wire harness traction mechanism 5 in sequence from back to front, the wire supply guide mechanism 2, the guide die mechanism 10, the extrusion die 9, the cooling and shaping die 8, the two symmetrically arranged cutter mechanisms 4 and the wire harness traction mechanism 5 are located between the two traction feeders 7, and the guide die mechanism 10 is detachably connected to the extrusion die 9, the extrusion die 9 is detachably connected to the cooling and shaping die 8, the guide die mechanism 10 is connected to the external extruder I through a pipeline, the extrusion die 9 is connected to the external extruder II through a pipeline, a heating box 11, a water pump 12, a water tank 3 and a cooler 6 are provided on the side of the base 1, the water tank 3, the water pump 12, the cooler 6, the cooling and shaping die 8, the heating box 11 and the guide die mechanism 10 are connected in sequence through pipelines, and the water tank 3 and the guide die mechanism 10 are connected through pipelines to form a liquid cooling circulation system.

[0086] The staff pulls out a number of biomass fiber bundles from the supply wire guide mechanism 2 and arranges them in order. Then, after passing through the guide die mechanism 10, the extrusion die 9 and the cooling and shaping die 8 in the arranged order, the staff winds the number of biomass fiber bundles on the corresponding wire bundle traction mechanism 5. Then, the equipment is debugged and the water pump is started. The water pump draws out the water in the water tank 3 and pumps it into the cooler 6. After being cooled by the cooler 6, the water is transported to the cooling and shaping die 8. Then, the water is transported from the cooling and shaping die to the heating box 11. After being heated by the heating box 11, the water is transported to the guide die mechanism 10. The guide die mechanism 10 is heated to form a preheating zone. Then, the water is transported from the guide die mechanism 10 to the water tank 3 to form a water cycle.

[0087] Then the staff puts the processed aluminum material on the traction feeder 7 on the rear side in turn. The traction feeder 7 clamps the aluminum material and transports the aluminum material. The aluminum material passes through the middle position of the wire guide mechanism 2 and enters the preheating zone of the guide die mechanism 10. The preheating zone of the guide die mechanism 10 preheats the aluminum material. The aluminum material continues to move toward the front side of the guide die mechanism 10. During the movement, the external extruder I squeezes the Vitrimer material into the guide die mechanism 10. The Vitrimer material infiltrates a number of biomass fiber bundles. The aluminum material continues to move and contacts the infiltrated biomass fiber bundles. The Vitrimer material and the infiltrated biomass fiber bundles are compounded on the surface of the aluminum material. While in contact, the wire bundle traction mechanism 5 pulls a number of biomass fiber bundles, so that the biomass fiber bundles move synchronously with the aluminum material. When the aluminum material reaches the extrusion die 9, the external extruder I squeezes the molten modified plastic into the extrusion die 9. When the aluminum material passes, the molten modified plastic is squeezed between the Vitrimer material and the aluminum material. The composite surface of the soaked biomass fiber bundles is formed by the Vitrimer material and the soaked biomass fiber bundles into a sheet shape, and the Vitrimer material is connected to each other to form an interface bonding layer. The modified plastic in a molten state is bonded above the interface bonding layer to form a modified plastic layer. The aluminum material, the interface bonding layer and the modified plastic layer are combined to form an aluminum-plastic composite material. Then the aluminum-plastic composite material continues to move into a cooling and shaping mold 8, and continues to move after being cooled and shaped by the cooling and shaping mold 8, and enters below the two cutting mechanisms 4. The two cutting mechanisms 4 move downward to cut off the biomass fiber bundles, the Vitrimer material and the modified plastic at the ends of the aluminum-plastic composite material that are not composited on the aluminum material, and the redundant materials are cut off, and the waste is transported out from the base 1. After cutting, the wire harness traction mechanism 5 tractions and rolls up the broken wire harness, and then stops moving. The aluminum-plastic composite material continues to move to the traction feeder 7 on the front side, and the traction feeder 7 on the front side clamps the aluminum-plastic composite material and transports it out;

[0088] After the excess material between the two adjacent ends of the aluminum-plastic composite material enters below the two cutting mechanisms 4, the two cutting mechanisms 4 move downward to cut off the excess material, and the waste material falls down and is transported out.

[0089] Two mounting frames 13 are provided on the base 1, and mounting frames 4 16, 3 15 and 2 14 are provided on the base 1 in sequence, wherein the mounting frames 4 16, 3 15 and 2 14 are located between the two mounting frames 13, the 2 14 is fixedly connected to the 3 15, and an avoidance passage is formed between the 3 15 and the 4 16. A material drop opening is provided on the upper end surface of the 2 14, and a material discharge opening is provided on the side of the 2 14, and the material drop opening is communicated with the material discharge opening, and a material drop slope 18 is provided inside the 2 14, and the bottom end of the material drop slope 18 is provided. Extending to the bottom of the discharge port, the upper end surface of the mounting frame 14 is provided with four stoppers 17 symmetrically arranged in pairs. The four stoppers 17 are arranged in pairs and are respectively located on the front and rear sides of the mounting frame 14. The distance between the two stoppers 17 on the same side is equal to the width of the aluminum-plastic composite material. A support plate 19 is provided between the two stoppers 17 on the left and between the two stoppers 17 on the right. The support plate 19 is located above the blanking slope 18. The stoppers 17 and the support plates 19 both form a cutter avoidance opening. The distance between the two stoppers 17 on the same side in front and behind is the same as the distance between two adjacent aluminum materials.

[0090] When the excess material at the end of the aluminum-plastic composite material is cut off, the waste material falls from the blanking port onto the blanking slope 18, slides down the blanking slope 18, is transported to the external trolley through the discharge port, and is then recovered by the staff. The stopper 17 is used to cut the excess material and abuts against the left and right sides of the end of the aluminum-plastic composite material to avoid excess uncompounded material remaining. The support plate 19 is used to support the aluminum-plastic composite material during cutting. The avoidance channel facilitates pipeline connection, and the cutter avoidance port facilitates the movement of the cutter.

[0091] The traction feeder 7 includes a mounting frame 5 23, an electric screw 22 and two fixed seats 25. The mounting frame 5 23 is fixed at the end of the base 1, one of the fixed seats 25 is fixed to the inner side of the upper end of the mounting frame 5 23, and a plurality of guide rods are arranged on the inner side of the upper end of the mounting frame 5 23. The other fixed seat 25 is slidably arranged on the plurality of guide rods. The mounting frame 5 23 is provided with an electric screw 22, which is transmission-connected to the other fixed seat 25. A driving motor 1 24 is arranged inside the mounting frame 5 23, and a plurality of rotating rollers 26 are rotatably arranged on the fixed seats 25. Conveyor belts 20 are arranged outside the plurality of rotating rollers 26 of the two fixed seats 25, and the output shaft of the driving motor 1 24 is transmission-connected to the rotating shaft of one of the rotating rollers 26 of the two fixed seats 25. A supporting ring 21 is arranged at the bottom of the two conveyor belts 20.

[0092] When conveying aluminum, the electric screw 22 drives another fixed seat 25 to move, so that the two fixed seats 25 are close to each other, and the two conveyor belts 20 cooperate with each other to clamp the aluminum. Then the output shaft of the driving motor 24 rotates to drive the rotating shaft of the rotating roller 26 at the corresponding position to rotate, thereby driving the two conveyor belts 20 to move, conveying the aluminum, and the supporting ring 21 supports the aluminum.

[0093] The wire supply guide mechanism includes a table frame 27, the rear side of the table frame 27 is fixed on the mounting frame 13, the upper and lower ends of the rear side of the table frame 27 are provided with a coil frame 29, the left and right ends of the rear side of the table frame 27 are provided with a coil frame 2, a plurality of fiber bundle coils are provided on the coil frame 29 and the coil frame 20, a guide roller 28 is provided on the upper and lower ends of the front side of the table frame 27, a guide roller 2 31 is provided on the left and right ends of the front side of the table frame 27, and a plurality of guide grooves are provided on the guide roller 28 and the guide roller 2 31.

[0094] The staff pulls out a plurality of biomass fiber bundles from the fiber bundle coils on two coil frames 1 29 and two coil frames 2 30 , arranges them in order, guides them through a plurality of guide grooves on the corresponding guide roller 1 28 and guide roller 2 31 , and enters the guide mold mechanism 10 .

[0095] The wire harness traction mechanism 5 includes a table frame 32, which is fixed on the mounting frame 13 on the front side. The upper and lower sides of the rear end of the table frame 32 are rotatably provided with wire harness traction rollers 33. Two drive motors 35 are fixed to the side of the rear end of the table frame 32. The output shafts of the two drive motors 35 are fixedly connected to the wire harness traction rollers 33 at corresponding positions respectively. Two mounting plates are provided on the left and right sides of the rear end of the table frame 32. The two mounting plates on the same side are located between the two wire harness traction rollers 33. A wire harness traction roller 34 is rotatably provided between the two mounting plates on the same side. A drive motor 36 is fixed to the side of one of the two mounting plates on the same side. The output shafts of the drive motors 36 are fixedly connected to the wire harness traction rollers 34.

[0096] The output shafts of the two driving motors 2 35 rotate to drive the wire harness traction rollers 1 33 at the corresponding positions to move and traction the wire harnesses, and the output shafts of the driving motors 3 36 rotate to drive the wire harness traction rollers 2 34 at the corresponding positions to move and traction the wire harnesses.

[0097] The cutter mechanism 4 includes a mounting frame 6 38, which is fixed on the mounting frame 2 14. The mounting frame 6 38 is provided with an electric push rod 37, and a wedge-shaped cutter 39 is fixed below the telescopic end of the electric push rod 37. The distance between the wedge-shaped cutters 39 of the two cutter mechanisms 4 is equal to the distance between the two blocks 17, and the wedge-shaped cutter 39 is located above the blanking port.

[0098] The telescopic end of the electric push rod 37 drives the wedge-shaped cutter 39 to move downward to cut off the excess material at the end of the aluminum-plastic composite material.

[0099] The guide mold mechanism 10 includes a guide mold mechanism body 40, which is fixed on a mounting frame 416. An aluminum material channel 2 50 is provided inside the guide mold mechanism body 40. An aluminum material preheating portion 46 is provided at the rear side of the guide mold mechanism body 40. An aluminum material channel 1 45 is provided inside the aluminum material preheating portion 46. The aluminum material channel 1 45 is located at the rear side of the aluminum material channel 2 50. The aluminum material channel 1 45 is connected to the aluminum material channel 2 50, and the aluminum material channel 1 45 passes through the aluminum material preheating portion 46 and extends into the guide mold mechanism body 40. The width of the aluminum material channel 1 45 is The sum of the length and twice the diameter of the biomass fiber bundle is equal to the width of the aluminum channel 2 50, the sum of the thickness of the aluminum channel 1 45 and twice the diameter of the biomass fiber bundle is equal to the thickness of the aluminum channel 2 50, a plurality of preheating pipes 44 are provided on the aluminum preheating part 46, the water inlets of the plurality of preheating pipes 44 are connected to the water outlets of the heating box 11 through pipes, the water outlets of the plurality of preheating pipes 44 are connected to the water inlet of the water tank 3 through pipes, a plurality of feed pipes 1 41 are provided on the upper and lower sides of the guide mold mechanism body 40, and a plurality of feed pipes 1 41 are provided on the left and right sides of the guide mold mechanism body 40. The material pipe 41 and one end of the feed pipe 41 are connected to the external extruder Ⅰ through a pipeline, and the feed pipe 41 extends into the interior of the guide die mechanism body 40, and the other end of the feed pipe 41 is provided with an inclined flow channel 47. The rear side of the guide die mechanism body 40 is provided with a plurality of fiber bundle channels 43, and the plurality of fiber bundle channels 43 are located on the four sides of the aluminum channel 45. The fiber bundle channels 43 are divided into a horizontal section and an inclined section, and are all located inside the guide die mechanism body 40. The inclined sections of the plurality of fiber bundle channels 43 are connected to the inclined flow channel 47 on the same side. 47 are connected, and the ends of the inclined flow channel 1 47 are connected with the aluminum channel 1 45 and the aluminum channel 2 50. The four sides of the guide mold mechanism body 40 are provided with a plurality of check holes, and the check holes are connected with the horizontal section ends of the fiber bundle channels 43 at the corresponding positions. Check plugs 42 are detachably provided in the check holes, and the check plugs 42 are made of a pressurized expansion material, and the pressurized expansion material is one of expanded graphite or liquid crystal elastomer. The ends of the check plugs 42 are arranged in the corresponding fiber bundle channels 43, and the ends of the check plugs 42 are provided with fiber bundle passage holes.

[0100] The water heated by the heating box 11 enters into a plurality of preheating tubes 44, heats the aluminum material preheating part 46, and forms an aluminum material preheating zone. After the aluminum material enters the aluminum material preheating part 46 from the aluminum material channel 1 45, it moves toward the front side of the guide die mechanism body 40 after being preheated in the aluminum material preheating zone. During the movement, the external extruder I squeezes the Vitrimer material into the feed pipe 1 41 through the pipeline. The Vitrimer material squeezes into the inclined flow channel 1 47 through the feed pipe 1 41, and infiltrates a plurality of biomass fiber bundles in the inclined flow channel 1 47. When the aluminum material passes through the end of the inclined flow channel 1 47, the Vitrimer material and the infiltrated biomass fiber bundles are compounded on the surface, and then the aluminum material moves synchronously to the aluminum material channel 2 50 on the front side.

[0101] When the Vitrimer material is squeezed in, the Vitrimer will flow along the several fiber bundle channels 43 and reach the end of the check plug 42, thereby pressurizing the check plug 42. The check plug 42 expands and squeezes the several biomass fiber bundles under pressure. The several biomass fiber bundles are subjected to pressure resistance in the passage hole. The check plug 42 detects the pressure resistance to adjust the feed amount of the Vitrimer material in the Vitrimer material infiltration composite part.

[0102] The extrusion die 9 includes an extrusion die body 49, which is connected to the guide die mechanism body 40 by bolts. The interior of the extrusion die body 49 is provided with an aluminum material channel 2 50 and an aluminum material channel 3 52. The aluminum material channel 2 50 inside the extrusion die body 49 is connected to the aluminum material channel 2 50 inside the guide die mechanism body 40. The aluminum material channel 2 50 inside the extrusion die body 49 is connected to the aluminum material channel 3 52 and is located at the rear side of the aluminum material channel 3 52. The sum of the width of the aluminum material channel 2 50 and twice the diameter of the biomass fiber bundle is equal to the aluminum material channel 2 50. The width of the aluminum material channel three 52, the sum of the thickness of the aluminum material channel two 50 and twice the diameter of the biomass fiber bundle is equal to the thickness of the aluminum material channel three 52, a plurality of feed pipes two 48 are provided on the upper and lower sides of the extrusion die body 49, and feed pipes two 48 are provided on the left and right sides of the extrusion die body 49, one end of the feed pipe two 48 is connected to the external extruder II through a pipeline, the feed pipes two 48 are extended into the interior of the extrusion die body 49, and the other end of the feed pipe two 48 is provided with an inclined flow channel two 51, which is connected to the aluminum material channel three 52.

[0103] The aluminum material enters the extrusion die body 49 through the aluminum material channel 2 50. At the same time, the external extruder I squeezes the molten modified plastic into all the feed pipes 2 48 through the pipeline, and squeezes it into the inclined flow channel 2 51 through all the feed pipes 2 48. When the aluminum material passes through, in the aluminum material channel 3 52, the molten modified plastic is squeezed on the composite surface of the Vitrimer material and the several infiltrated biomass fiber bundles, and the Vitrimer material and the several infiltrated biomass fiber bundles are formed into sheets, so that the Vitrimer material is connected to each other to form an interface bonding layer, and the molten modified plastic is bonded above the interface bonding layer to form a modified plastic layer. The aluminum material, the interface bonding layer and the modified plastic layer are combined to form an aluminum-plastic composite material, which is transported out and then enters the cooling and shaping die 8.

[0104] The cooling and shaping mold 8 is fixed on the mounting frame 3 15, and a plurality of cooling pipes are arranged on the cooling and shaping mold 8. An aluminum channel 3 52 is arranged inside the cooling and shaping mold 8. The water inlets of the plurality of cooling pipes are connected to the water outlets of the cooler 6 through pipes, and the water outlets of the plurality of cooling pipes are connected to the water inlet of the heating box 11 through pipes.

[0105] The aluminum-plastic composite material enters from the aluminum material channel 3 52 of the cooling and shaping mold 8, and the cooling water enters the cooling and shaping mold 8 from the water inlets of the cooling pipes. The cooling water takes away the heat on the aluminum-plastic composite material to cool and shape the aluminum-plastic composite material. The heated water enters the heating box 11 from the water outlets of the cooling pipes, thereby reducing energy consumption.

[0106] Example 1

[0107] The fully recyclable aluminum-plastic-based multi-component composite co-extrusion material prepared in Example 1 of the present invention is as follows: Fig.13 As shown in the figure, the thickness of the modified plastic surface layer is 1.2mm, the average thickness of the interface bonding layer is about 0.6mm, and the aluminum core layer is a 60mm×15mm (width×thickness) rectangular cavity material. Among them, the modified plastic surface layer is composed of 77% by mass of 5000S polyethylene, 18% by mass of sodium ion polymer Surlyn1601, 4% by mass of nano titanium dioxide, 0.5% by mass of benzotriazole UV absorber and 0.5% by mass of antioxidant 1010; the mass of Vitrimer material with polyolefin as the main body in the interface bonding layer accounts for 40%, the mass of Vitrimer material with EVA as the main body accounts for 20%, and the mass of EVA-MA accounts for 40%; the diameter of the bamboo fiber bundle in the interface bonding layer is 0.5mm, and it is parallelly distributed on the surface of the aluminum substrate at an equal interval of 4mm, with 14 strands arranged in the width direction and 4 strands arranged in the thickness direction; the cavity diameter and wall thickness of the aluminum material are both 1.5mm.

[0108] The above production steps are as follows:

[0109] Step 1: Aluminum material processing, transportation and preheating: Use plasma to treat the surface of the aluminum material to achieve cleaning and decontamination to enhance adhesion. Start the water pump, which draws water from the water tank 3 and pumps it into the cooler 6. After cooling in the cooler 6, the water is transported to the cooling and shaping mold 8. Then the water is transported from the cooling and shaping mold to the heating box 11. After being heated in the heating box 11, the water is transported to the guide mold mechanism 10. The guide mold mechanism 10 is heated to form a preheating zone. Then the water is transported from the guide mold mechanism 10 to the water tank 3 to form a water cycle. Then the staff will treat the aluminum material. The aluminum material is placed on the two supporting rings 21 of the traction feeder 7 at the rear side in sequence. Then, the electric screw 22 drives another fixed seat 25 to move, so that the two fixed seats 25 are close to each other, and the two conveyor belts 20 cooperate with each other to clamp the aluminum material. Then, the output shaft of the driving motor 24 rotates to drive the rotating shaft of the rotating roller 26 at the corresponding position to rotate, thereby driving the two conveyor belts 20 to move and transport the aluminum material. The aluminum material passes through the middle position of the bench frame 27, and the aluminum material enters the aluminum material preheating part 46 from the aluminum material channel 45, and the preheating part of the guide mold mechanism 10 preheats the aluminum material.

[0110] Step 2, fiber bundles are impregnated with wire drawing: the staff pulls out a number of biomass fiber bundles from the fiber bundle coils on two coil frames 1 29 and two coil frames 2 30, arranges them in order, guides them through a number of guide grooves on the corresponding guide roller 1 28 and guide roller 2 31, enters the corresponding fiber bundle channel 43, enters the aluminum channel 1 45 and the aluminum channel 2 50 from the inclined flow channel 1 47, and enters the aluminum channel 3 52 from the aluminum channel 2 50, and finally winds them on the wire drawing roller 1 33 and the wire drawing roller 2 34 at the corresponding positions; the staff puts the mixed Vitrimer material on the extruder Extruded from the machine I, the Vitrimer material is squeezed into the inclined flow channel 47 through the feed pipe 41, and several biomass fiber bundles are infiltrated in the inclined flow channel 47. When the Vitrimer material is squeezed in, the Vitrimer will flow along the several fiber bundle channels 43 and reach the end of the check plug 42, so that the check plug 42 is pressurized. The check plug 42 is pressurized and expands to squeeze the several biomass fiber bundles. The several biomass fiber bundles are subjected to pressure resistance in the passage hole. The check plug 42 detects the pressure resistance to adjust the feed amount of the Vitrimer material in the Vitrimer material infiltration compound part;

[0111] Step 3, wire harness co-extrusion: when the aluminum material passes through the end of the inclined flow channel 1 47, the Vitrimer material and the impregnated biomass fiber bundles are compounded on the surface, and then the aluminum material moves synchronously to the aluminum channel 2 50 on the front side;

[0112] Step 4, co-extrusion, molding, cutting and finished product delivery of modified plastics: the aluminum material enters the extrusion die body 49 through the aluminum material channel 2 50. At the same time, the external extruder I squeezes the molten modified plastic into all the feed pipes 2 48 through the pipeline, and squeezes it into the inclined flow channel 2 51 through all the feed pipes 2 48. When the aluminum material passes through, in the aluminum material channel 3 52, the molten modified plastic is squeezed on the composite surface of the Vitrimer material and the several biomass fiber bundles impregnated, and the Vitrimer material and the several biomass fiber bundles impregnated are formed into sheets, so that the Vitrimer materials are connected to each other to form an interface bonding layer, and the molten modified plastic The modified plastic is bonded on the interface bonding layer to form a modified plastic layer. The aluminum material, the interface bonding layer and the modified plastic layer are combined to form an aluminum-plastic composite material. The aluminum-plastic composite material enters from the aluminum material channel 3 52 of the cooling and shaping mold 8. Cooling water enters the cooling and shaping mold 8 from the water inlets of a plurality of cooling pipes. The cooling water takes away the heat on the aluminum-plastic composite material to cool and shape the aluminum-plastic composite material. The telescopic end of the electric push rod 37 drives the wedge-shaped cutter 39 to move downward to cut off the excess material at the end of the aluminum-plastic composite material, and then continues to move to the traction feeder 7 on the front side. The traction feeder 7 on the front side clamps the aluminum-plastic composite material and transports it out. The product cross-section of the aluminum-plastic composite material is as follows: Fig.13 shown.

[0113] Example 2

[0114] In the interface bonding layer, the weight of the Vitrimer material mainly composed of polyolefin accounts for 20%, the weight of the Vitrimer material mainly composed of EVA accounts for 20%, the weight of EVA-MA accounts for 60%, and the other materials are consistent with those in Example 1.

[0115] Example 3

[0116] In the interface bonding layer, the weight of the Vitrimer material with polyolefin as the main body accounts for 60%, the weight of the Vitrimer material with EVA as the main body accounts for 20%, and the weight of EVA-MA accounts for 20%. Other materials are consistent with those in Example 1.

[0117] Example 4

[0118] In the interface bonding layer, the weight of the Vitrimer material mainly composed of polyolefin accounts for 45%, the weight of the Vitrimer material mainly composed of EVA accounts for 5%, the weight of EVA-MA accounts for 50%, and the other materials are consistent with those in Example 1.

[0119] Comparative Example 1

[0120] The aluminum-plastic composite material is composed of only a modified plastic surface layer and an aluminum core layer; the thickness of the modified plastic surface layer is increased to 1.8 mm, and the raw material ratio is consistent with that in Example 1; and the material of the aluminum core layer is consistent with that in Example 1.

[0121] Comparative Example 2

[0122] No bamboo fiber bundle is used in the interface bonding layer, and other materials are consistent with those in Example 1.

[0123] Comparative Example 3

[0124] The interface bonding layer is composed only of EVA-MA; the materials used for the modified plastic surface layer and the aluminum core layer are consistent with those in Example 1.

[0125] Comparative Example 4

[0126] The interface bonding layer is composed of EVA-MA and bamboo fiber bundles, and the diameter of the bamboo fiber bundles is 0.5 mm; the materials used for the modified plastic surface layer and the aluminum core layer are consistent with those in Example 1.

[0127] Performance Testing

[0128] In order to better illustrate the present invention, the performance of the fully recycled aluminum-plastic-based multi-component co-extruded material obtained in each implementation scheme is tested below. The standard testing method in the industry is used to test the product's interface bonding strength, resistance to cold and hot cycle performance, room temperature and 80°C high temperature bending performance, 110°C and 140°C interface peeling force tests, and comparison is made with comparative examples.

[0129] 1. Interface bonding strength test: According to the standard GB / T 17657, the bonding strength test of the modified plastic surface layer / interface bonding layer and the interface bonding layer / aluminum core layer interface is carried out in turn. The multi-component co-extruded material is sawn into a sample of 50mm×50mm×18.6mm (length×width×thickness), and the modified plastic surface layer is sliced ​​with a circular milling cutter to form a circular area of ​​1000mm². The circular area is bonded to the fixture with epoxy resin, and the interface bonding strength between the modified plastic surface layer / interface bonding layer is tested with a universal mechanical testing machine; for the sample tested above, the circular milling cutter is used to slice the internal interface bonding layer to form a circular area of ​​1000mm². The circular area is bonded to the fixture with epoxy resin again, and the interface bonding strength between the interface bonding layer / aluminum core layer is tested with a universal mechanical testing machine.

[0130] 2. Thermal cycle resistance test: Refer to the standard GB / T 24508, and cut a 180mm long sample from the multi-component co-extruded material for thermal cycle resistance test. Repeated periodic tests are performed on the sample according to the process of immersing in 60℃ water for 24h, freezing in a high and low temperature and humidity test chamber at -29℃ for 24h, and placing in an 80℃ oven for 24h, until the composite interface in the sample is peeled off or the interface bonding layer is cracked, and the number of periodic tests and the location of the failure point experienced by the sample are recorded.

[0131] 3. Bending performance test at room temperature and 80℃: Refer to standard GB / T 36408, cut 370mm long samples from multi-composite co-extruded materials, and conduct three-point bending performance tests at room temperature and 80℃ respectively. The test speed is 5mm / min, the span is 300mm, and the bending strength value is recorded.

[0132] 4. 110℃ and 140℃ interface peeling force test: refer to standard GB / T 1040, and conduct tensile peeling force test on the modified plastic surface layer / interface bonding layer interface and the interface bonding layer / aluminum core layer interface of multi-component co-extruded materials in 110℃ and 140℃ environments respectively. Interface peeling force test Fig.12 As shown, a sample of 100mm×10mm×18.6mm (length×width×thickness) is cut from the multi-composite co-extruded material along the extrusion direction, and the test layer is first separated 10mm from the sample with a blade. Then the entire sample is placed on a fixed base fixture and locked, and the 10mm separation layer is placed on a mobile fixture and locked. The test layer is peeled off from the sample at a vertical speed of 5mm / min, and the maximum peeling force is recorded.

[0133] Finally, the test results are as follows:

[0134] 1. Interface bonding strength test results are as follows: Fig.14As shown, bonding strength 1 refers to the bonding strength between the modified plastic surface layer / interface bonding layer, bonding strength 2 refers to the bonding strength between the modified plastic surface layer or the interface bonding layer / aluminum core layer, and the unit of bonding strength is MPa.

[0135] (1) From the test results of bonding strength 1 or bonding strength 2 of Example 1 and Comparative Example 1, it can be seen that the interface bonding strength of the traditional aluminum-plastic co-extrusion material composed of modified plastic surface layer / aluminum core layer is low and cannot meet the application requirements; adding an interface bonding layer between the aluminum core layer and the modified plastic surface layer can effectively solve the interface bonding problem of the traditional aluminum-plastic material and greatly improve the structural stability of the aluminum-plastic based multi-component composite co-extrusion material.

[0136] (2) From the test results of the bonding strength 1 of Example 1, Example 2, Example 3, Example 4, Comparative Example 3 and Comparative Example 4, it can be seen that the Vitrimer material with polyolefin as the main body in the interface bonding layer dominates the bonding strength 1. As the mass proportion of the Vitrimer material with polyolefin as the main body increases, the bonding strength 1 value increases accordingly, until the strength of the tested interface bonding layer is greater than the fixture bonding strength, the fixture epoxy bonding layer peels off.

[0137] (3) From the test results of bonding strength 2 of Example 1, Example 2, Example 3, Example 4, Comparative Example 3 and Comparative Example 4, it can be seen that the EVA-MA in the interface adhesive layer dominates the bonding strength 2. The higher the mass proportion of EVA-MA, the greater the bonding strength 2 value.

[0138] (4) From the test results of bonding strength 1 and bonding strength 2 of Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4, it can be seen that the biomass fiber bundles in the interface bonding layer can improve the physical properties and deformation resistance of the interface bonding layer, thereby also having a certain improvement effect on the bonding strength 1 value and the bonding strength 2 value.

[0139] In addition, it should be noted that when testing the interface bonding strength, a fixture is required to bond the peeling layer. The bonding here generally uses epoxy resin or hot melt adhesive with very high bonding strength. When the tested interface strength is greater than the fixture bonding strength, the fixture epoxy bonding layer will peel off.

[0140] 2. Test results of thermal cycle resistance performance Fig.15 As shown, failure position 1 refers to the interface of the modified plastic surface layer / interface bonding layer, failure position 2 refers to the interface of the interface bonding layer / aluminum core layer, failure position 3 refers to the inside of the interface bonding layer, and failure position 4 specifically refers to the interface of the modified plastic surface layer / aluminum core layer in Comparative Example 1.

[0141] (1) From the test results of the cold and heat cycle resistance of all the embodiments and comparative examples, it can be seen that the interface bonding strength of the aluminum-plastic co-extruded material with the conventional modified plastic surface layer / aluminum core layer structure is low and the cold and heat cycle resistance is poor. Adding an interface bonding layer between the aluminum core layer and the modified plastic surface layer significantly improves the cold and heat cycle resistance of the aluminum-plastic based multi-component composite co-extruded material; the covalent cross-linking network of the Vitrimer material in the interface bonding layer at the reverse conversion temperature can compensate for the difference in cold and hot deformation between the modified plastic surface layer and the aluminum core layer, thereby improving the durability of the aluminum-plastic based multi-component composite co-extruded material in a variable temperature environment; the higher the interface bonding strength value, the better the cold and heat cycle resistance; the biomass fiber bundle can improve the physical properties of the interface bonding layer and the deformation resistance in a temperature change environment, thereby improving the cold and heat cycle resistance of the aluminum-plastic based multi-component composite co-extruded material.

[0142] (2) From the test results of the cold and hot cycle resistance of Example 1 and Example 4, it can be seen that the EVA-based Vitrimer material in the interface bonding layer is a compatibilizer of the polyolefin-based Vitrimer material and EVA-MA, which can reduce the melt cohesion between the two phases of the material and enhance the anti-internal cracking ability of the interface bonding layer under a temperature change environment.

[0143] The results of the bending performance tests at room temperature and 80°C are as follows: Fig.16 As shown, the unit of flexural strength is MPa.

[0144] It can be seen from the room temperature and 80°C bending performance test results of all embodiments and comparative examples that the interface bonding strength of the traditional aluminum-plastic co-extrusion material with the traditional surface layer / aluminum core layer structure is low, the peeling force is small, and it cannot meet the application requirements. The aluminum-plastic co-extrusion material with the modified plastic surface layer / aluminum core layer structure has low interface bonding strength and premature interface shear failure in the bending test, resulting in low bending performance; the covalent cross-linking network of the Vitrimer material in the interface bonding layer at the reversible conversion temperature makes it have excellent physical properties at room temperature and 80°C environment, so that the aluminum-plastic based multi-composite co-extrusion material has excellent bending performance at room temperature and 80°C; the biomass fiber bundle can improve the physical properties of the interface bonding layer in a temperature change environment, thereby improving the bending performance of the aluminum-plastic based multi-composite co-extrusion material at room temperature and 80°C.

[0145] 4. The test results of the interfacial peeling force at 110℃ and 140℃ are as follows: Fig.17 As shown, the interfacial peeling force of the modified plastic surface layer / interface adhesive layer is tested at 110°C, and the interfacial peeling force of the interfacial adhesive layer / aluminum core layer is tested at 140°C. For comparative example 1, the interfacial peeling force of the modified plastic surface layer / aluminum core layer is tested only at 110°C, and the unit of the peeling force is N.

[0146] It should be noted that in this test result, sub-layer peeling will occur, which means that after the aluminum core layer / interface bonding layer peels off, it is impossible to peel off layer by layer.

[0147] (1) From the interfacial peeling force test results of Example 1, Example 2, Example 3, Example 4, Comparative Example 1 and Comparative Example 2 at 110°C, it can be seen that the interfacial peeling force of the modified plastic surface layer / interfacial adhesive layer is positively correlated with the interfacial bonding strength. The traditional aluminum-plastic co-extrusion material composed of a modified plastic surface layer / aluminum core layer has a low interfacial bonding strength and a small peeling force, which cannot meet the application requirements.

[0148] (2) From the interfacial peeling force test results of Example 1, Comparative Example 3 and Comparative Example 4 at 110°C, it can be seen that at 110°C, the interfacial adhesive layer that does not contain Vitrimer material will also melt and soften, making it difficult to peel off the modified plastic surface layer and the interfacial adhesive layer, and unable to separate layer by layer and fully recycle.

[0149] (3) From the interfacial peeling force test results of Example 1, Example 2, Example 3, Example 4, Comparative Example 2, Comparative Example 3 and Comparative Example 4 at 140°C, it can be seen that the interfacial peeling force values ​​of the interfacial bonding layer / aluminum core layer containing Vitrimer materials in the interfacial bonding layer are much larger than those without Vitrimer materials, indicating that the reversible conversion of the covalent cross-linking network of the interfacial bonding layer containing two Vitrimer materials also occurs in a step-by-step temperature manner, which greatly ensures the safety of the use of aluminum-plastic based multi-component composite co-extrusion materials.

[0150] It can be seen from the above embodiments and comparative examples that the aluminum-plastic-based multi-component composite co-extrusion material of the present invention has good structural strength, high stability, multifunctionality, meets diversified usage requirements, is highly safe, and can be separated layer by layer and fully recycled.

[0151] The preparation process of the composite co-extrusion material of the present invention has low energy consumption, good extrusion effect, high preparation efficiency and more stable finished product quality.

[0152] In the preparation process of the present invention, the production mold used can sequentially perform the following tasks: automatic positioning and conveying, fiber bundle supply and traction and infiltration, bundle co-extrusion, modified plastic co-extrusion, cooling and molding, waste cutting and finished product conveying.

[0153] In summary, the two traction feeders 7 cooperate to clamp and convey the aluminum material and convey the formed aluminum-plastic composite material to complete automatic conveying;

[0154] The wire guide mechanism 2 cooperates with the wire bundle traction mechanism 5, the wire guide mechanism 2 supplies a number of biomass fiber bundles, and the wire bundle traction mechanism 5 pulls a number of biomass fiber bundles, and cooperates with the aluminum-plastic composite material to move synchronously, so that the number of biomass fiber bundles are evenly arranged on the surface of the aluminum material to ensure stable quality;

[0155] The guide die mechanism 10 cooperates with the extruder I to compound the Vitrimer material and a number of biomass fiber bundles on the surface of the aluminum material, and automatically adjusts the supply of the Vitrimer material, which is convenient and efficient, and ensures product quality;

[0156] The guide die mechanism 10 cooperates with the external extruder II and the extrusion die 9 to compound the molten modified plastic on the Vitrimer material and a number of biomass fiber bundles to form an aluminum-plastic composite material with high preparation efficiency and good extrusion effect;

[0157] The water pump 12 cooperates with the cooler 6, the cooling and shaping mold 8, the heating box 11, the guide mold mechanism 10 and the water tank 3 to quickly cool the cooling and shaping mold 8 and the aluminum-plastic composite material, heat the guide mold mechanism 10, and form a liquid cooling circulation system with low energy consumption;

[0158] The base 1 cooperates with the two cutting mechanisms 4 to cut the material at the end of the aluminum-plastic composite material, thereby ensuring product quality and facilitating recycling.

[0159] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A fully recyclable aluminum-plastic multi-component co-extrusion material, characterized in that: The aluminum-plastic-based multi-component composite co-extrusion material comprises, from outside to inside, a modified plastic surface layer, an interface bonding layer and an aluminum core layer; The modified plastic surface layer is prepared from 60 to 85 parts by weight of a polyolefin matrix, 10 to 25 parts by weight of an ion polymer, 0.5 to 5 parts by weight of a nano-metal oxide, 0.1 to 0.5 parts by weight of an antioxidant and 0.3 to 1.0 parts by weight of an ultraviolet absorber, and has a thickness of 0.5 to 2.5 mm. The interface bonding layer is composed of a composite of biomass fiber bundles arranged in parallel along the extrusion direction and a Vitrimer material containing a thermally reversible covalent cross-linked network, and has a thickness of 0.2 to 1.5 mm; The aluminum core layer is a shaped or non-shaped cavity or solid core structure substrate made of aluminum or aluminum alloy, with a width of 30 to 600 mm and a thickness of 4 to 80 mm; The Vitrimer material containing a thermally reversible covalent cross-linked network is composed of 30 to 50 parts by weight of a Vitrimer material mainly composed of polyolefin, 10 to 25 parts by weight of a Vitrimer material mainly composed of ethylene-vinyl acetate copolymer (EVA), and 25 to 60 parts by weight of ethylene-vinyl acetate copolymer grafted with maleic anhydride (EVA-MA). The Vitrimer material with polyolefin as the main body is prepared by grafting high-density polyethylene with dioxaborolene, introducing active reaction points of dioxaborolane on the carbon-carbon single bond skeleton, and then performing a double decomposition reaction between the active reaction points and bisdioxaborolane; The Vitrimer material with ethylene-vinyl acetate copolymer (EVA) as the main body is PEVA prepared by cross-linking EVA with dicumyl peroxide (DCP); The Vitrimer material is impregnated and compounded with the fiber bundle when passing through the co-extrusion flow channel of the impregnation compounding part, and then merged with the aluminum material and the surface modified plastic in the extrusion die (9). The impregnated biomass fiber bundles are formed into sheets under the melt pressure of the modified plastic, so that the Vitrimer materials are connected to each other to form an interface bonding layer; The softening temperature of the modified plastic surface layer is 80-120°C, and the thermal reversible conversion temperature of the covalent cross-linked network of the Vitrimer material in the interface bonding layer is 130-160°C. The modified plastic surface layer and the interface bonding layer can be separated layer by layer through step temperature treatment, thereby realizing the full recycling of aluminum-plastic based multi-component composite co-extrusion materials.

2. The fully recyclable aluminum-plastic-based multi-component composite co-extrusion material according to claim 1 is characterized in that: The polyolefin in the modified plastic surface layer is selected from at least one of high-density polyethylene, low-density polyethylene, linear low-density polyethylene, heat-resistant polyethylene, polypropylene and polystyrene; the ion polymer is selected from at least one of sodium ion polymer Surlyn8920, 8528, 8320, 8020, 1601-2, zinc ion polymer Surlyn9721, 9945, 9910, 9520, 9320, 9120 and lithium sodium ion polymer Surlyn7940; the nano metal oxide is at least one of nano titanium dioxide, nano aluminum oxide and nano zinc oxide; the antioxidant is at least one of antioxidant 1010, 168, 1076, B225, B215, B900, HostanoxP-EPQ, PW-9225B, PS802FL and PS800; the ultraviolet absorber is at least one of benzotriazole, benzophenone and hindered amine; The biomass fiber bundle is made by twisting at least one of wood, bamboo, cotton and hemp fibers into bundles, and the diameter of the fiber bundle is 0.1-1.0 mm.

3. The production process of the fully recyclable aluminum-plastic-based multi-component composite co-extrusion material according to claim 1 or 2, characterized in that: The production process includes the following steps: Step 1: aluminum material treatment, conveying and preheating: using plasma to treat the surface of the aluminum material to achieve cleaning and decontamination, thereby enhancing adhesion, and then using a traction feeder (7) to feed the aluminum material into the guide die mechanism (10) at a uniform speed; Step 2, fiber bundle supply line traction impregnation: a plurality of biomass fiber bundles enter the guide die mechanism (10); a uniformly mixed Vitrimer material is placed in an extruder A for extrusion, and the Vitrimer material enters the guide die mechanism (10) to impregnate the plurality of biomass fiber bundles; Step 3, wire bundle co-extrusion: compounding with a plurality of impregnated biomass fiber bundles on the surface of the aluminum material through a guide die mechanism (10); Step 4, co-extrusion of modified plastics, cooling and molding, waste cutting and finished product transportation: the uniformly mixed modified plastics are placed in an external extruder II for extrusion, and are composite-molded with the aluminum material, a plurality of biomass fiber bundles and Vitrimer material in step 3 through an extrusion die (9), and then enter a cooling and molding die (8) for molding to prepare an aluminum-plastic composite material.

4. The production process of the fully recyclable aluminum-plastic-based multi-component composite co-extrusion material according to claim 3 is characterized in that: The production mold used in step 1 and step 4 comprises a base (1), both ends of the base (1) are provided with a traction feeder (7), the two traction feeders (7) are symmetrically arranged, and the base (1) is provided with a wire supply guide mechanism (2), a guide die mechanism (10), an extrusion die (9), a cooling and shaping die (8), two symmetrically arranged cutter mechanisms (4) and a wire harness traction mechanism (5) in sequence from back to front, the wire supply guide mechanism (2), the guide die mechanism (10), the extrusion die (9), the cooling and shaping die (8), the two symmetrically arranged cutter mechanisms (4) and the wire harness traction mechanism (5) are located between the two traction feeders (7), and the guide die mechanism (1 0) is detachably connected to the extrusion die (9), the extrusion die (9) is detachably connected to the cooling and shaping die (8), the guide die mechanism (10) is connected to the external extruder I through a pipeline, the extrusion die (9) is connected to the external extruder II through a pipeline, a heating box (11), a water pump (12), a water tank (3) and a cooler (6) are provided on the side of the base (1), the water tank (3), the water pump (12), the cooler (6), the cooling and shaping die (8), the heating box (11) and the guide die mechanism (10) are connected in sequence through pipelines, and the water tank (3) and the guide die mechanism (10) are connected through pipelines to form a liquid cooling circulation system.

5. The production process of the fully recyclable aluminum-plastic-based multi-component composite co-extrusion material according to claim 4 is characterized in that: The base (1) is provided with two mounting frames (13), and the base (1) is provided with mounting frame (4) (16), mounting frame (3) (15) and mounting frame (2) (14) in sequence, the mounting frame (4) (16), mounting frame (3) (15) and mounting frame (2) (14) are located between the two mounting frames (13), the mounting frame (2) (14) is fixedly connected to the mounting frame (3) (15), and an avoidance passage is formed between the mounting frame (3) (15) and the mounting frame (4) (16), the upper end surface of the mounting frame (2) (14) is provided with a blanking port, the side of the mounting frame (2) (14) is provided with a discharge port, the blanking port is communicated with the discharge port, and the interior of the mounting frame (2) (14) is provided with a blanking slope (18), and the blanking slope The bottom end of the mounting frame (18) extends to the bottom of the discharge port. The upper end surface of the mounting frame (14) is provided with four stoppers (17) symmetrically arranged in pairs. The four stoppers (17) are arranged in pairs and are respectively located on the front and rear sides of the mounting frame (14). The distance between the two stoppers (17) on the same side is equal to the width of the aluminum-plastic composite material. A support plate (19) is provided between the two stoppers (17) on the left side and between the two stoppers (17) on the right side. The support plate (19) is located above the blanking slope (18). The stoppers (17) and the support plate (19) both form a cutter avoidance opening. The distance between the two stoppers (17) on the same side is the same as the distance between two adjacent aluminum materials.

6. The production process of the fully recyclable aluminum-plastic-based multi-component composite co-extrusion material according to claim 5 is characterized in that: The traction feeder (7) comprises a mounting frame (23), an electric screw (22) and two fixed seats (25), the mounting frame (23) being fixed to the end of the base (1), one of the fixed seats (25) being fixed to the inner side of the upper end of the mounting frame (23), a plurality of guide rods being arranged on the inner side of the upper end of the mounting frame (23), the other fixed seat (25) being slidably arranged on the plurality of guide rods, the mounting frame (23) being provided with an electric screw (22), the electric screw (22) being transmission-connected to the other fixed seat (25), a driving motor (24) being arranged inside the mounting frame (23), a plurality of rotating rollers (26) being rotatably arranged on the fixed seats (25), a conveyor belt (20) being arranged outside the plurality of rotating rollers (26) of the two fixed seats (25), an output shaft of the driving motor (24) being transmission-connected to a rotating shaft of one of the rotating rollers (26) of the two fixed seats (25), and a supporting ring (21) being arranged at the bottom of the two conveyor belts (20); The wire supply guide mechanism comprises a table frame (27), the table frame (27) is fixed on the mounting frame (13) at the rear side, a coil frame (29) is provided at the upper and lower ends of the rear side of the table frame (27), a coil frame (30) is provided at the left and right ends of the rear side of the table frame (27), a plurality of fiber bundle coils are provided on the coil frame (29) and the coil frame (30), a guide roller (28) is provided at the upper and lower ends of the front side of the table frame (27), a guide roller (31) is provided at the left and right ends of the front side of the table frame (27), and a plurality of guide grooves are provided on the guide roller (28) and the guide roller (31); The wire harness traction mechanism (5) comprises a bench frame 2 (32), the bench frame 2 (32) being fixed on a mounting frame 1 (13) at the front side, a wire harness traction roller 1 (33) being rotatably provided on both upper and lower sides of the rear end of the bench frame 2 (32), two drive motors 2 (35) being fixed on the side of the rear end of the bench frame 2 (32), the output shafts of the two drive motors 2 (35) being respectively fixedly connected to the wire harness traction rollers 1 (33) at corresponding positions, two mounting plates being provided on both left and right sides of the rear end of the bench frame 2 (32), the two mounting plates on the same side being located between the two wire harness traction rollers 1 (33), a wire harness traction roller 2 (34) being rotatably provided between the two mounting plates on the same side, a drive motor 3 (36) being fixed on the side of one of the two mounting plates on the same side, the output shafts of the drive motor 3 (36) being fixedly connected to the wire harness traction roller 2 (34); The cutter mechanism (4) comprises a sixth mounting frame (38), the sixth mounting frame (38) being fixed on the second mounting frame (14), the sixth mounting frame (38) being provided with an electric push rod (37), a wedge-shaped cutter (39) being fixed below the telescopic end of the electric push rod (37), the distance between the wedge-shaped cutters (39) of the two cutter mechanisms (4) being equal to the distance between the two stoppers (17), and the wedge-shaped cutter (39) being located above the blanking opening.

7. The production process of the fully recyclable aluminum-plastic-based multi-component composite co-extrusion material according to claim 6 is characterized in that: The guide die mechanism (10) comprises a guide die mechanism body (40), the guide die mechanism body (40) being fixed on a mounting frame (16), an aluminum material channel (2) (50) being provided inside the guide die mechanism body (40), an aluminum material preheating portion (46) being provided at the rear side of the guide die mechanism body (40), an aluminum material channel (1) (45) being provided inside the aluminum material preheating portion (46), the aluminum material channel (1) (45) being located at the rear side of the aluminum material channel (1) (50), the aluminum material channel (1) (45) being connected to the aluminum material channel (1) (50), and the aluminum material channel (1) (45) passing through the aluminum material preheating portion (46) and extending into the guide die mechanism body (40), The sum of the width of the aluminum material channel 1 (45) and twice the diameter of the biomass fiber bundle is equal to the width of the aluminum material channel 2 (50), the sum of the thickness of the aluminum material channel 1 (45) and twice the diameter of the biomass fiber bundle is equal to the thickness of the aluminum material channel 2 (50), a plurality of preheating pipes (44) are provided on the aluminum material preheating portion (46), the water inlets of the plurality of preheating pipes (44) are connected to the water outlets of the heating box (11) via pipes, the water outlets of the plurality of preheating pipes (44) are connected to the water inlet of the water box (3) via pipes, a plurality of feed pipes 1 (41) are provided on both upper and lower sides of the guide mold mechanism body (40), and the left side of the guide mold mechanism body (40) is provided with a plurality of feed pipes 1 (41). A feed pipe (41) is provided on both sides of the right side, one end of the feed pipe (41) is connected to the external extruder I through a pipeline, the feed pipe (41) extends into the interior of the guide die mechanism body (40), and the other end of the feed pipe (41) is provided with an inclined flow channel (47), a plurality of fiber bundle channels (43) are provided on the rear side of the guide die mechanism body (40), the plurality of fiber bundle channels (43) are located on the four outer sides of the aluminum channel (45), the fiber bundle channels (43) are divided into a horizontal section and an inclined section, and are located inside the guide die mechanism body (40), and the inclined sections of the plurality of fiber bundle channels (43) are connected to the same side. The inclined flow channel 1 (47) is connected, and the ends of the inclined flow channel 1 (47) are connected to the aluminum channel 1 (45) and the aluminum channel 2 (50). The four sides of the guide mold mechanism body (40) are provided with a plurality of check holes. The check holes are connected to the ends of the horizontal sections of the fiber bundle channels (43) at corresponding positions. Check plugs (42) are detachably provided in the check holes. The check plugs (42) are made of a pressure-expandable material. The pressure-expandable material is one of expanded graphite and liquid crystal elastomer. The ends of the check plugs (42) are arranged in the corresponding fiber bundle channels (43). The ends of the check plugs (42) are provided with fiber bundle passage holes. The extrusion die (9) comprises an extrusion die body (49), the extrusion die body (49) and the guide die mechanism body (40) are connected by bolts, an aluminum material channel 2 (50) and an aluminum material channel 3 (52) are provided inside the extrusion die body (49), the aluminum material channel 2 (50) inside the extrusion die body (49) is connected to the aluminum material channel 2 (50) inside the guide die mechanism body (40), the aluminum material channel 2 (50) inside the extrusion die body (49) is connected to the aluminum material channel 3 (52) and is located at the rear side of the aluminum material channel 3 (52), and the width of the aluminum material channel 2 (50) is equal to the sum of twice the diameter of the biomass fiber bundle. The width of the aluminum channel 3 (52) is equal to the width of the aluminum channel 2 (50), the sum of the thickness of the aluminum channel 2 (50) and twice the diameter of the biomass fiber bundle is equal to the thickness of the aluminum channel 3 (52), a plurality of feed pipes 2 (48) are provided on both the upper and lower sides of the extrusion die body (49), and feed pipes 2 (48) are provided on both the left and right sides of the extrusion die body (49), one end of the feed pipes 2 (48) is connected to the external extruder II through a pipeline, the feed pipes 2 (48) extend into the interior of the extrusion die body (49), and the other end of the feed pipes 2 (48) is provided with inclined flow channels 2 (51), which are connected to the aluminum channel 3 (52); The cooling and shaping mold (8) is fixed on the mounting frame three (15), and a plurality of cooling pipes are provided on the cooling and shaping mold (8). An aluminum material channel three (52) is provided inside the cooling and shaping mold (8). The water inlets of the plurality of cooling pipes are connected to the water outlets of the cooler (6) via pipes, and the water outlets of the plurality of cooling pipes are connected to the water inlet of the heating box (11) via pipes.

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