Manufacturing process of bamboo-based wood-plastic composite material and product thereof

Abstract

A bamboo-based wood-plastic composite material manufacturing process has the following steps: S1, a bamboo processing step; S2, a bamboo core pretreatment step; S3, a wood-plastic composite material raw material preparation step; S4, a wood-plastic composite material hot processing step; S5, a bamboo blank processing step; S6, a wood-plastic composite material blank covering bamboo blank step; S7, a cooling and shaping step. The present application solves the problems of high density, high cost, brittleness and insufficient toughness of the existing wood-plastic composite material based on thermoplastic polymer, realizes the use of bamboo instead of plastic and solves the problem of recycling of waste plastic which is difficult to reuse. The present application can overcome the shortcomings of the prior art, be used for preparing a more practical and durable wood-plastic composite material which still has good mechanical properties after heating and forming. The present application also provides a product prepared by the bamboo-based wood-plastic composite material manufacturing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wood-plastic composites, and particularly to a manufacturing process for bamboo-based wood-plastic composites and products manufactured using the process. BACKGROUND

[0002] With the increasing emphasis on ecological environment and sustainable development, there is an increasing demand for green and low-carbon materials, and materials with good ecological properties such as wood-plastic composites have gained attention due to their good corrosion resistance, moisture resistance, and insect resistance, and are increasingly used in the construction industry, landscaping industry, building decoration industry, and furniture manufacturing industry. Bamboo is a typical green and low-carbon material with superior performance. However, as a biological material, bamboo contains lignin, cellulose, and hemicellulose, and the cell wall composed of these three main components is the main source of nutrients for decay fungi. In addition, bamboo is a hydrophilic material, and the large number of voids (pith cell cavities, sieve tubes, and conduits) in the material are channels for water and air. Therefore, during storage, transportation, and use, it is prone to mold, discoloration, insect damage, and decay in humid environments, and its poor mold resistance, decay resistance, and insect resistance have caused problems for the use of bamboo. In recent years, some researchers have improved the protective properties and antibacterial properties of bamboo by changing its chemical composition or surface treatment. For example, a method for preparing reconstituted bamboo (CN115488990A) reports a method for improving the corrosion resistance of bamboo through physical treatment and material modification, showing the potential of modified bamboo in corrosion prevention.

[0003] In recent years, the consumption of wood has increased dramatically, and the growth cycle of wood is relatively long, which has led to a gradual shortage of global wood resources, but the market demand is still large, resulting in a shortage of supply. At the same time, environmental pollution caused by waste plastics has become a concern, but waste plastics are also a potential resource that is difficult to utilize, and how to effectively recycle and utilize them has become an important issue. Using recycled plastics and waste wood to prepare wood-plastic composites not only effectively recycles and utilizes waste resources, but also solves the problem of wood resource shortage.

[0004] The raw material of the wood-plastic composite material can be special wood and plastic, or factory leftover waste wood and difficult-to-degrade waste plastic. The wood-plastic composite material is a green material that turns waste into treasure and has the dual characteristics of wood and plastic. However, the wood-plastic composite material prepared by some current processes has high density and high cost, and may have problems such as high brittleness and insufficient toughness during use, and the manufacturing technology of the wood-plastic composite material needs to be improved. Combining lightweight and high-strength bamboo with wood-plastic composite material with superior performance and good durability can obtain a material with superior performance, but the characteristics of insufficient affinity between bamboo and plastic in chemical properties and physical structure, and the difficulty of unclear and difficult processing technology must be faced. Whether integrated bamboo or wood-plastic composite material is high-density and high-cost, how to save materials, reduce costs and manufacture market-recognized bamboo-based wood-plastic composite material products with a reasonable manufacturing process is a problem currently faced. SUMMARY

[0005] The present application aims to overcome the deficiencies in the background art and provide a bamboo-based wood-plastic composite material manufacturing process and furniture product. To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A bamboo-based wood-plastic composite material manufacturing process has the following steps: S1, a bamboo processing step: bamboo poles and bamboo splints are prepared from raw bamboo; S2, a bamboo core pretreatment step: bamboo cores are prepared by finishing the bamboo poles and bamboo splints; S3, a wood-plastic composite material raw material preparation step: thermoplastic wood-plastic composite material raw materials are prepared; S4, a wood-plastic composite material hot processing step: the wood-plastic composite material raw materials are processed to between 115°C and 145°C to obtain wood-plastic composite material blanks; S5, a bamboo blank processing step: the bamboo splints are woven and then subjected to cooking treatment, and then processed into bamboo blanks with a fixed length and width; S6, a wood-plastic composite material blank and bamboo blank compounding step: the wood-plastic composite material blanks and the bamboo blanks are combined, and temperature and pressure are controlled to shape them; S7, a cooling and shaping step: a shaped wood-plastic composite material is prepared by reducing the temperature.

[0007] Further, the bamboo processing step of step S1 includes: removing branches from raw bamboo, and initially polishing the bamboo joints on the outer surface of the raw bamboo to obtain bamboo poles for standby use; longitudinally decomposing the bamboo poles, removing inter-nodal septum by external force, and obtaining bamboo sheets for standby use; longitudinally splitting the bamboo sheets and performing standardization treatment to obtain bamboo splints, separating the bamboo green and bamboo yellow in the bamboo splints, and storing them separately after being cut to a fixed length; and crushing the processing residues of the bamboo to prepare bamboo fibers for standby use.

[0008] Further, the bamboo core pretreatment step of step S2 includes: performing at least one of the following treatments on at least one of the other part of the bamboo poles or bamboo sheets: preservative, polishing, green removal, and polishing, and performing standardization treatment to prepare bamboo cores for standby use.

[0009] Further, the wood-plastic composite material raw material preparation step of step S3 comprises: taking one or more of bamboo fibers, wood fibers, hemp fibers, straw fibers, and rice hull fibers to perform a drying process, and mixing the dried material with at least one of polyolefin materials and one or more of antioxidants, anti-aging agents, anti-ultraviolet agents, calcium carbonate, lubricants, and pigments, and performing mechanical processing to obtain the wood-plastic composite material raw material.

[0010] Further, the wood-plastic composite material hot processing step of step S4 comprises: taking the wood-plastic composite material raw material into a double-screw extruder with heating and pressurizing functions, and performing physical and chemical changes through parallel double-screw rotation and rolling stirring of the double-screw extruder to obtain the wood-plastic composite material blank with a temperature of 115°C to 145°C.

[0011] Further, the bamboo blank processing step of step S5 comprises: weaving the bamboo green and / or bamboo yellow obtained in step S1 to obtain a bamboo fabric part, and connecting the bamboo fabric part with the bamboo core obtained in step S2 to obtain the bamboo blank.

[0012] Further, the wood-plastic composite material blank and bamboo blank compounding step of step S6 comprises: wrapping at least part of the bamboo blank obtained in step S5 with the wood-plastic composite material blank obtained in step S4, and applying an external force to the bamboo blank to cause controllable deformation of the bamboo blank wrapped by the wood-plastic composite material blank, and fixing the product.

[0013] Further, the cooling and shaping step of step S7 comprises: cooling and shaping the product obtained in step S5 with a cooling device, and performing mechanical processing and / or manual processing to obtain the bamboo-based wood-plastic composite material.

[0014] Further, the wood-plastic composite material raw material is prepared into granules by a granulator in step S3, the granules of the wood-plastic composite material raw material are preheated and softened in a hot-pressing mold in step S4 to obtain the wood-plastic composite material blank with a temperature of 115°C to 145°C, the wood-plastic composite material blank is placed on the upper and lower sides of the bamboo woven fabric in step S6, and a mold is used to constrain it, the temperature in the mold is controlled to be between 110°C and 140°C, and the wood-plastic composite material blank is caused to flow into the gaps and fibers of the bamboo woven fabric through press molding; the entire mold is cooled in step S7 to cause the bamboo woven fabric and the wood-plastic composite material blank to fuse and controllably deform in the mold, thereby realizing compounding of the wood-plastic composite material and the bamboo woven fabric.

[0015] Further, in step S4, the wood-plastic composite material raw material is placed in an infrared heating oven preheated to 20 DEG C higher than the melting point of the wood-plastic base resin to soften the wood-plastic composite material raw material to obtain a wood-plastic composite material blank, wherein the wood-plastic composite material raw material is one of a wood-plastic plate or a wood-plastic profile.

[0016] Further, in step S7, the cooling device is an air flow cooling system or a cooling liquid circulation system.

[0017] Further, in step S7, the cooling device has a liquid nitrogen temperature control device, and the temperature in the device is reduced to a predetermined range by injecting a certain amount of liquid nitrogen to efficiently cool and shape the product.

[0018] Further, in step S7, the cooling device uses compressed air to blow through the surface and / or interior of the product to quickly reduce the material temperature and stabilize the material properties.

[0019] Further, in the step of combining the wood-plastic composite material blank with the bamboo blank in step S6, a layer of hot melt adhesive film is attached to the bamboo blank; the width of the bamboo splints is between 4 mm and 10 mm, and the thickness of the bamboo splints is between 0.8 mm and 1.2 mm; the bamboo blank has a plurality of weaving pores less than 1.5 mm.

[0020] In order to achieve the above-mentioned purposes, the present application also provides the following technical solutions: a bamboo-based wood-plastic composite material product is manufactured using the bamboo-based wood-plastic composite material manufacturing process of any one of the above technical solutions, and the parts of the wood-plastic composite material are connected or assembled to obtain the bamboo-based wood-plastic composite material product.

[0021] Further, the bamboo-based wood-plastic composite material product is assembled from a seat surface part, a backrest part, a leg part, and a connecting part, wherein the seat surface part and the backrest part are both made of the wood-plastic composite material, the backrest part has an outer contour edge made by a hot bending process of the bamboo pole, the seat surface part is connected to the backrest part, and the leg part is connected to the seat surface part.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] The bamboo material is isolated and protected by using the waterproof and moisture-proof performance of the wood-plastic composite material, and the bamboo material with good flexibility is used as the core layer of the weaving surface to improve the overall flexibility of the wood-plastic composite material. This combination can fully utilize the advantages of bamboo material and wood-plastic composite material, and achieve the purpose of complementary advantages.

[0024] The bamboo-based wood-plastic composite profile has good toughness, reduced density and cost, long service life, good buffering performance, good mechanical properties after heating forming, strong bending modeling implementation and strong designability.

[0025] The present application aims at the problems of high density and high cost of the existing wood-plastic composite material, and the problems of large brittleness and insufficient toughness in the use process. The present application utilizes the thermoplastic characteristics of the wood-plastic composite material and the characteristics that the bamboo material can be deformed under heating, changes the defects of insufficient affinity in chemical properties and physical structure of the bamboo material and the polyolefin component in the wood-plastic composite material through structural design and process innovation, so that the wood-plastic composite material can penetrate into the gaps of the bamboo material and the bamboo-woven material, and effectively combine the lightweight high-strength bamboo material and the thermoplastic wood-plastic composite material with superior performance and good durability under certain temperature and pressure, to provide a new manufacturing process and product of the bamboo-based wood-plastic composite material which can reduce the cost and provide superior performance. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The process flow chart of the bamboo-based wood-plastic composite material manufacturing process of the present application.

[0027] Figure 2 The process flow chart of another specific embodiment of the bamboo-based wood-plastic composite material manufacturing process of the present application.

[0028] Figure 3 The furniture product schematic diagram manufactured by the bamboo-based wood-plastic composite material of the present application.

[0029] Figure 4 The furniture product schematic diagram of another embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described in the description of the present application combined with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0031] In the description of the present application, it should be noted that the terms “upper end”, “lower end”, “inner”, “outer”, “front end”, “rear end”, “two ends”, “one end”, “another end” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "provided with", "provided with", "connected", "connected", etc. should be understood broadly, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Please refer to Figures 1-2 The present application provides a technical solution:

[0034] A bamboo-based wood-plastic composite material manufacturing process has the following steps: S1, a bamboo processing step: bamboo poles and bamboo canes are prepared from raw bamboo; S2, a bamboo core pretreatment step: the bamboo poles and bamboo canes are finely processed to obtain a bamboo core; S3, a wood-plastic composite material raw material preparation step: thermoplastic wood-plastic composite material raw materials are prepared; S4, a wood-plastic composite material hot processing step: the wood-plastic composite material raw materials are processed to between 115°C and 145°C to obtain a wood-plastic composite material blank; S5, a bamboo blank processing step: the bamboo canes are woven and then subjected to a steaming treatment, and then processed to a certain length and width to obtain a bamboo blank; S6, a wood-plastic composite material blank and bamboo blank compounding step: the wood-plastic composite material blank and the bamboo blank are combined, and temperature and pressure are controlled to make them plastic; S7, a cooling and shaping step: a shaped wood-plastic composite material is obtained by reducing the temperature. The beneficial effects of this embodiment are that, in view of the problems of high density and high cost of existing wood-plastic composite materials, and the possibility of large brittleness and insufficient toughness during use, the thermoplastic properties of wood-plastic composite materials and the characteristics of bamboo that can deform when heated are utilized, and the deficiencies of insufficient affinity in chemical properties and physical structure between bamboo and polyolefin components in wood-plastic composite materials are changed through structural design and process innovation, so that the wood-plastic composite material can penetrate into the gaps of the bamboo blank woven by bamboo and bamboo canes, and under certain temperature and pressure, the lightweight and high-strength bamboo and the thermoplastic wood-plastic composite material with superior performance and good durability are effectively combined to provide a new bamboo-based wood-plastic composite material manufacturing process that can reduce costs and provide superior performance.

[0035] As a further improvement of the above technical solution, the bamboo processing step of step S1 comprises: taking raw bamboo and removing branches, and preliminarily polishing the bamboo joints on the outer surface of the raw bamboo to obtain bamboo poles for standby; longitudinally decomposing the bamboo poles to obtain bamboo pieces for standby after removing the inter-nodal septum by external force; longitudinally splitting the bamboo pieces and performing standardization treatment to obtain bamboo splints, separating the bamboo green and bamboo yellow in the bamboo splints, and storing them separately after cutting to a fixed length for standby; and crushing the processing residues of the bamboo to obtain bamboo fibers for standby; the bamboo core pretreatment step of step S2 comprises: performing at least one of the following treatments on at least one of the other part of the bamboo poles or the bamboo pieces: preservation, polishing, green removal, and polishing, and performing standardization treatment to obtain bamboo cores for standby; the wood-plastic composite material raw material preparation step of step S3 comprises: taking one or more of bamboo fibers, wood fibers, hemp fibers, straw fibers, and rice hull fibers to perform drying process treatment, and mixing the materials after drying treatment with at least one of polyolefin materials and one or more of antioxidants, anti-aging agents, anti-ultraviolet agents, calcium carbonate, lubricants, and pigments, and performing mechanical processing to obtain wood-plastic composite material raw materials; the wood-plastic composite material hot processing step of step S4 comprises: taking the wood-plastic composite material raw materials into a double-screw extruder with heating and pressurizing functions, and realizing physical and chemical changes of the wood-plastic composite material raw materials through parallel double-screw rotation and rolling stirring of the double-screw extruder to obtain wood-plastic composite material blanks with a temperature of 115°C to 145°C; and the bamboo blank processing step of step S5 comprises: weaving the bamboo green and / or bamboo yellow obtained in step S1 to obtain a bamboo fabric part, and connecting the bamboo fabric part with the bamboo core obtained in step S2 to obtain a bamboo blank. The beneficial effects of this embodiment are that, since the bamboo is plasticized by heat and the optimal plastic processing temperature thereof is between 110°C and 140°C, the present application effectively utilizes the high temperature of 115°C to 145°C in the wood-plastic composite material processing process to make the bamboo blank wrapped by the wood-plastic composite material absorb the residual heat of the wood-plastic composite material to soften, and to deform under the action of pressure, without the need for additional energy consumption, and the wood-plastic composite material blank and the bamboo blank woven with bamboo splints can be fused with each other, so that the polyolefin material in the wood-plastic composite material can contact and penetrate into the woven gap between the bamboo splints as much as possible, so as to be firmly combined, thereby effectively enhancing the mechanical properties of the wood-plastic composite material.

[0036] As a further improvement of the above technical solution, the step S6 of combining the wood-plastic composite material blank with the bamboo blank comprises: wrapping the bamboo blank prepared in step S5 with at least part of the wood-plastic composite material blank prepared in step S4, and applying an external force to the bamboo blank, so that the bamboo blank wrapped by the wood-plastic composite material blank is subjected to heat and pressure to cause controllable deformation, and the product is fixed. The beneficial effects of this embodiment are that: by applying wood-plastic composite material to some key parts and parts where bamboo needs to be heat-deformed, the key parts can be better protected from damage, the weak links can be strengthened, and the safety, stability and durability of the connection nodes can be improved; when the bamboo blank is completely coated, better coating effect can be achieved, and weight reduction of the wood-plastic composite material has value and significance; the external force applied to the bamboo blank can promote the wood-plastic composite material to penetrate into the interior of the bamboo blank, and also promote the bamboo blank to deform as needed to meet the functional needs of related products; at the same time, such a way does not depend on molds, and can also reduce production costs, and it is easy to obtain products with more rich shapes and more aesthetic changes.

[0037] As a further improvement of the above technical solution, the step S7 of cooling and shaping comprises: cooling and shaping the product prepared in step S5 by using a cooling device, and preparing a bamboo-based wood-plastic composite material by mechanical processing and / or manual processing. The beneficial effects of this embodiment are that: natural cooling is indeed more energy-saving but not conducive to improving efficiency, while using a cooling device can make production easier to organize, and the product can be solidified in a shorter time, and its shape and performance will be more stable, which is conducive to improving the qualified rate and quality of the product.

[0038] As a further improvement of the above technical solution, in the step S3, the wood-plastic composite material raw material is prepared into granules by a granulator for standby, in the step S4, the granules of the wood-plastic composite material raw material are placed in a hot-pressing mold for preheating and softening treatment, and a wood-plastic composite material blank with a temperature of 115°C to 145°C is prepared; in the step S6, the wood-plastic composite material blank is placed on the upper and lower sides of the bamboo woven fabric article, and a mold is used to constrain it, the temperature in the mold is controlled to be between 110°C and 140°C, and the wood-plastic composite material blank is made to flow into the gaps and fibers of the bamboo woven fabric under pressure plastic forming; in the step S7, the entire mold is cooled, so that the bamboo woven fabric article and the wood-plastic composite material blank are fused and controllably deformed in the mold, and the wood-plastic composite material and the bamboo woven fabric article are compounded. The beneficial effects of this embodiment are that the temperature of the mold is controlled and the wood-plastic composite material is cooled in the mold, so that the molding of the wood-plastic composite material is more expected, and the performance of the obtained product is better. And this process overcomes the shortcomings of flame heating, salt mist softening or steam softening commonly used in the processing of bamboo products, avoids local overheating and surface quality decline caused by direct flame heating of the surface of the bamboo, and avoids safety problems such as fire that may be caused. In addition, it overcomes the corrosion of salt mist softening to equipment, reduces the process cost, and avoids the negative impact of salt mist softening on the environment. At the same time, it also overcomes the adverse effects of water on the processing process and final performance of wood-plastic composite materials caused by steam softening, and avoids the generation of quality problems such as mold and discoloration of bamboo caused by damp.

[0039] As a further improvement of the above technical solution, in the step S4, the wood-plastic composite material raw material is placed in an infrared heating oven preheated to 20°C higher than the melting point of the wood-plastic matrix resin to heat and soften it to obtain a wood-plastic composite material blank, and the wood-plastic composite material raw material is one of a wood-plastic plate or a wood-plastic profile. The beneficial effects of this embodiment are that the bamboo-based wood-plastic composite material is manufactured by secondary heating of the plate or profile, which is beneficial to obtain a more suitable wood-plastic composite material shape and is more beneficial to subsequent use. And this way reduces the continuity requirement of the production process, and a certain amount of energy consumption can be exchanged for the controllability of the process.

[0040] As a further improvement of the above technical solution, in the step S7, the cooling device is a flowing air cooling system or a cooling liquid circulation system. The beneficial effects of this embodiment are that the introduction of high-efficiency cooling methods makes the material cool and set faster, and also makes the material performance more stable.

[0041] As a further improvement of the above technical solution, the cooling device in step S7 has a liquid nitrogen temperature control device, and the temperature in the device is reduced to a predetermined range by injecting a certain amount of liquid nitrogen, so that the prepared product is cooled and shaped with high efficiency. The beneficial effect of this embodiment is that a proper amount of liquid nitrogen is added to the temperature control device instead of directly contacting the material, which is conducive to reducing the temperature of the equipment and the material, and can make the temperature of the high-temperature object decrease in a shorter time.

[0042] As a further improvement of the above technical solution, the cooling device in step S7 uses compressed air to blow through the surface and / or interior of the product to quickly reduce the temperature of the material and make the material properties tend to be stable. The beneficial effect of this embodiment is that compressed air is a more affordable material, and its use in step S7 is a good method to control the temperature and shaping speed of the final product. Since the bamboo pole has a hollow feature, better results can be achieved when using compressed air to cool the wood-plastic composite material with a bamboo pole (and removing or destroying the internode spacing membrane).

[0043] As a further improvement of the above technical solution, a layer of hot melt adhesive film is attached to the bamboo blank in the wood-plastic composite material blank and bamboo blank compounding step of step S6; the width of the bamboo splint is between 4mm and 10mm, and the thickness of the bamboo splint is between 0.8mm and 1.2mm; the bamboo blank has a number of weaving pores smaller than 1.5mm. The beneficial effect of this embodiment is that the wood-plastic composite material blank and the bamboo blank woven bamboo blank can better integrate with each other, so that the polyolefin material in the wood-plastic composite material can contact and penetrate into the weaving gap between the bamboo splints as much as possible, so that it is firmly combined, thereby effectively enhancing the mechanical properties of the wood-plastic composite material.

[0044] Please refer to Figures 3-4 The present application provides a technical solution:

[0045] The bamboo-based wood-plastic composite material manufacturing process described in any one of the above technical solutions is used to manufacture wood-plastic composite material parts, and the parts are connected or assembled to obtain a bamboo-based wood-plastic composite material product.

[0046] As a further improvement of the above technical solution, the bamboo-based wood-plastic composite material product is assembled from a seat surface part, a backrest part, a leg part, and a connecting part, the seat surface part and the backrest part are both made of the wood-plastic composite material, the backrest part has an outer contour edge made by a hot bending process of the bamboo pole, the seat surface part is connected to the backrest part, and the leg part is connected to the seat surface part. The beneficial effect of this embodiment is that the furniture product has excellent mechanical properties, is light and beautiful, and has good durability.

[0047] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A bamboo-based wood plastic composite manufacturing process, characterized in that, Having the following steps: S1, bamboo processing step: take the original bamboo to remove branches, and the original bamboo surface to obtain bamboo pole for use; the bamboo pole is longitudinally decomposed, and the intercalary septum is removed by external force to obtain bamboo piece for use; the bamboo piece is longitudinally split and standardized to obtain bamboo, and the bamboo green and bamboo yellow in the bamboo are separated, cut to length and stored separately for use; the processing residue of bamboo is crushed to make bamboo fiber for use; S2, bamboo core pretreatment step: at least one of the other part of the bamboo pole or bamboo piece is treated by at least one of preservative, polishing, green removal and polishing, and is standardized to obtain bamboo core for use; S3, wood-plastic composite material preparation step: one or several of bamboo fiber, wood fiber, hemp fiber, straw fiber and rice husk fiber is treated by drying process, and the dried material is mixed with at least one of polyolefin material and antioxidant, anti-aging agent, anti-ultraviolet agent, calcium carbonate, lubricant and pigment, and is mechanically processed to obtain wood-plastic composite material; S4, wood-plastic composite material hot processing step: the wood-plastic composite material is added into a double screw extruder with heating and pressing function, and the wood-plastic composite material is physically and chemically changed by the rotation and rolling stirring of the parallel double screw of the double screw extruder to obtain wood-plastic composite material with a temperature of 115°C to 145°C; S5, bamboo blank processing step: the bamboo green and / or bamboo yellow obtained by step S1 is woven, and then subjected to cooking treatment to obtain a bamboo fabric part, and the bamboo fabric part is connected with the bamboo core obtained by step S2 to obtain a bamboo blank; S6, wood-plastic composite material blank and bamboo blank compounding step: the wood-plastic composite material blank obtained by step S4 is wrapped around at least part of the bamboo blank obtained by step S5, and an external force is applied to the bamboo blank to make the bamboo blank wrapped by the wood-plastic composite material blank deform controllably under heat and pressure, and the product is fixed; S7, cooling and shaping step: the product obtained by step S5 is cooled and shaped by a cooling device, and a bamboo-based wood-plastic composite material is obtained by mechanical processing and / or manual processing.

2. The manufacturing process of bamboo-based wood-plastic composites according to claim 1, characterized in that: In the step S3, the wood-plastic composite material is made into pellets by a pelletizer for standby, and in the step S4, the pellets of the wood-plastic composite material are placed in a hot-pressing mold for preheating and softening treatment to obtain a wood-plastic composite material with a temperature of 115°C to 145°C; in the step S6, the wood-plastic composite material blank is placed on the upper and lower sides of the bamboo woven fabric article, and is constrained by a mold, the temperature in the mold is controlled to be between 110°C and 140°C, and the wood-plastic composite material blank is made to flow into the gaps and fibers of the bamboo woven fabric by pressure plasticizing; in the step S7, the whole mold is cooled to make the bamboo woven fabric article and the wood-plastic composite material blank deform controllably in the mold, realizing the compounding of the wood-plastic composite material and the bamboo woven fabric article.

3. The manufacturing process of bamboo-based wood-plastic composite material according to any one of claims 1-2, characterized in that: The cooling device in step S7 is a flowing air cooling system or a cooling liquid circulating system.

4. The manufacturing process of bamboo-based wood-plastic composites according to claim 3, characterized in that: The cooling device in step S7 has a liquid nitrogen temperature control device, and the temperature in the device is reduced to a predetermined range by injecting a certain amount of liquid nitrogen.

5. The manufacturing process of bamboo-based wood-plastic composites according to claim 3, characterized in that: The cooling device in step S7 uses compressed air to blow through the surface and / or interior of the product to reduce the temperature of the material as soon as possible.

6. The manufacturing process of bamboo-based wood-plastic composites according to any one of claims 1-2, characterized in that: A layer of hot melt adhesive film is attached to the outer surface of the bamboo blank in the step of combining the wood plastic composite blank with the bamboo blank in step S6; the width of the bamboo splint is between 4mm and 10mm, and the thickness of the bamboo splint is between 0.8mm and 1.2mm; the bamboo blank has a plurality of woven pores less than 1.5mm.

7. A bamboo-based wood-plastic composite product, characterized in that, The wood plastic composite parts are manufactured by using the bamboo-based wood plastic composite manufacturing process according to any one of claims 1-6, and the parts are connected or assembled to obtain a bamboo-based wood plastic composite product.

8. The bamboo-based wood-plastic composite product according to claim 7, characterized in that: The seat surface part and the backrest part are both made of the wood plastic composite material, the backrest part has a circle of outer contour edge made by heat bending another part of the bamboo pole, the seat surface part is connected with the backrest part, and the leg part is connected with the seat surface part. The cooling device in step S7 has a liquid nitrogen temperature control device, and the temperature in the device is reduced to a predetermined range by injecting a certain amount of liquid nitrogen. The cooling device in step S7 uses compressed air to blow through the surface and / or interior of the product to reduce the temperature of the material as soon as possible. A layer of hot melt adhesive film is attached to the outer surface of the bamboo blank in the step of combining the wood plastic composite blank with the bamboo blank in step S6; the width of the bamboo splint is between 4mm and 10mm, and the thickness of the bamboo splint is between 0.8mm and 1.2mm; the bamboo blank has a plurality of woven pores less than 1.5mm. The wood plastic composite parts are manufactured by using the bamboo-based wood plastic composite manufacturing process according to any one of claims 1-6, and the parts are connected or assembled to obtain a bamboo-based wood plastic composite product. The seat surface part and the backrest part are both made of the wood plastic composite material, the backrest part has a circle of outer contour edge made by heat bending another part of the bamboo pole, the seat surface part is connected with the backrest part, and the leg part is connected with the seat surface part.

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