WO2021136522A1

WO2021136522A1 - Large-breadth high-strength weather-resistant bamboo-wood composite material and manufacturing method therefor

Info

Publication number: WO2021136522A1
Application number: PCT/CN2020/142231
Authority: WO
Inventors: 李贤军; 薛志成; 李霞镇; 徐康; 李婷; 牟群英; 郝晓峰; 杨喜
Original assignee: 湖南桃花江竹材科技股份有限公司
Priority date: 2020-01-03
Filing date: 2020-12-31
Publication date: 2021-07-08
Also published as: CN111037674B; CN111037674A

Abstract

Provided is a method for manufacturing a large-breadth, high-strength, weather-resistant bamboo-wood composite material, the method comprising the following steps: placing dried bamboo curtain units and dried wood veneers in a high-pressure impregnation treatment tank; adding a treatment liquid for impregnation treatment, with the treatment liquid comprising a phenolic resin adhesive and a mildew-proof preservative; drying and balancing the impregnated bamboo curtain units and the impregnated wood veneers, and then placing same on a conveyor belt for continuous splicing in length and blank assembling treatment to obtain an inside structure of a plate blank having longitudinally arranged bamboo and transversely arranged wood and having an upper layer and a lower layer which are staggered in an overlapped manner, and performing cutting when a preset thickness and a preset length are reached so as to obtain plate blanks; and sequentially performing hot-press molding and post-treatment on the plate blanks to obtain the large-breadth, high-strength, weather-resistant bamboo-wood composite material. The bamboo-wood composite material manufactured by means of this method can be spliced in length without limit in the lengthwise direction, and has a large transverse binding force and high mildew-proof and corrosion-proof capability.

Description

Large-format high-strength weather-resistant bamboo-wood composite material and manufacturing method thereof

【Technical Field】

The invention belongs to the field of bamboo-wood composite material manufacturing in the wood industry, and relates to the manufacture of bamboo-wood composite recombined materials, in particular to a large-format high-strength weather-resistant bamboo-wood composite material and a manufacturing method thereof.

【Background technique】

Recombinant bamboo composite materials have the advantages of high longitudinal strength, dimensional stability and good processing performance, so they have huge potential application prospects in the field of modern bamboo and wood structure construction. However, they are restricted by factors such as bamboo unit size and billet assembly methods. Therefore, the length of the existing bamboo composite materials is generally less than 2m, which cannot be used in the manufacture of large-scale engineering materials and engineering components, which severely restricts the application and development of bamboo composite materials in the field of construction engineering. In addition, the existing recombined materials are manufactured by bamboo bundles in the longitudinal assembly of billets, which leads to weak transverse bonding and insufficient mechanical strength, and it is prone to cracking defects when used outdoors. In addition, bamboo is a natural biomass material rich in sugars such as starch, which is prone to rot and mildew during use, which seriously affects the service life of bamboo composite materials. Therefore, how to produce bamboo composite materials with large length, high transverse bonding force and strong corrosion resistance and weather resistance for the manufacture of large-scale engineering materials and engineering components is very important for expanding the application field of bamboo materials and increasing the added value of bamboo products. Significance.

[Summary of the invention]

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a large-format, high-strength, weather-resistant bamboo-wood composite material that extends infinitely in the length direction, has large horizontal bonding force, and has strong mold and corrosion resistance. method.

To solve the above technical problems, the present invention adopts the following technical solutions:

A manufacturing method of large-format high-strength weather-resistant bamboo-wood composite material includes the following steps:

S1. Dry the bamboo curtain unit and wood veneer made of bamboo strips or bamboo bundles until the moisture content is within 15%;

S2. Place the dried bamboo curtain unit and wood veneer in a high-pressure immersion treatment tank, and add a treatment solution for immersion treatment. The treatment solution includes a phenolic resin adhesive and an anti-mildew and preservative. The treatment solution contains phenolic resin. The solid content of the resin adhesive is 20-30%;

S3. The bamboo curtain unit and wood veneer after the immersion treatment are dried and balanced until the moisture content is between 10-20%;

S4. Place the dried and balanced bamboo curtain unit and wood veneer on the conveyor belt for continuous lengthening and assembling process, and cut off when reaching the preset thickness and length to obtain a slab; when assembling the blank, the slab includes There are multiple bamboo curtain layers and multiple wood veneer layers. There are multiple bamboo curtain layers between adjacent wood veneer layers. Each bamboo curtain layer is formed by connecting multiple bamboo curtain units in sequence along the conveyor belt. The wood veneer layer is formed by connecting multiple wood veneers in sequence along the conveyor belt; the fiber direction of the wood veneer inside the slab is perpendicular to the fiber direction of the bamboo curtain unit, and the adjacent bamboo curtain unit interfaces of the adjacent bamboo curtain layers are arranged in a staggered manner ；

S5. The slab is sequentially hot-pressed and post-processed to obtain a large-format, high-strength and weather-resistant bamboo-wood composite material.

As a further improvement to the above technical solution:

In the step S2, the mass ratio of the anti-mold and antiseptic agent to the treatment liquid is 0.001-0.05:1.

The anti-mold preservative includes the following components by weight: 15-25% of organosilicon quaternary ammonium salt, 25-35% of 3-iodo-2-propynyl-butylcarbamate, and 30-40% of propiconazole % And tebuconazole 5-20%.

The immersion treatment includes the following steps: first vacuumize the high-pressure immersion treatment tank to a vacuum of 0.02～0.09MPa, keep it for 5～10min, add the treatment liquid to completely soak the bamboo curtain unit and wood veneer, and press it to 0.4~1.0MPa, pressure is released after 10~20min, vacuum is again carried out to 0.02~0.08MPa, pressure is released after 5~10min, bamboo curtain unit and wood veneer are taken out.

In the step S1, when the bamboo strips or bamboo bundles are woven into bamboo curtain units, the bamboo strips or bamboo bundles are stitched in parallel with a braided thread, the width of the bamboo curtain unit is equal to the length of the bamboo strips or bamboo bundles, and the width of the bamboo curtain unit The length of the bamboo curtain unit is 1 to 3m, the length of the bamboo curtain unit is 1 to 3m; the distance between adjacent bamboo strips or bamboo bundles is not more than 2mm, and the distance between adjacent braided lines is 0.3 to 0.5m.

In the step S1, the preparation method of the bamboo strips includes: cutting the fresh moso bamboo into bamboo tubes with a length of 1 to 3 m, and then dividing the bamboo tube into bamboo strips with a thickness of 1 to 3 mm in the radial or chord direction;

The preparation method of the bamboo bundles includes: dividing the bamboo tube into bamboo slices with a width of 15-130mm in a radial direction, and then rolling the bamboo slices into loose bamboo bundles that are transversely and longitudinally penetrated.

In the step S3, the drying temperature is 50-60°C; the temperature of the equilibrium treatment is 25-32°C, the relative humidity is 60%-90%, the treatment time is 10-15 days, and the wind speed is 0.1-0.5 m/s.

In the step S4, the number of wood veneer layers of the slab does not exceed 40% of the total number of layers of the slab; the length of the slab is 4-15m and the width is 1-3m.

In the step S5, during the hot pressing, the temperature of the slab core layer is 130-155° C., and the hot pressing pressure is 3-10 MPa. When the temperature of the slab core layer reaches the set temperature, the temperature is maintained for 5-20 minutes.

Preferably, in the step S1, if bamboo bundles are used to weave the bamboo curtain unit, the size of the bamboo bundle only needs to be evenly matched. It does not involve the selection process of bamboo chips, and the production efficiency is higher, and it is more suitable for large-scale production.

Preferably, in the step S4, the distance between adjacent bamboo curtain unit interfaces of adjacent bamboo curtain layers of the slab is less than 30 cm.

Preferably, in the step S4, the total number of layers of the slab is an odd number, which is the central layer of the wood veneer slab. The bamboo curtain layer and the wood veneer layer are arranged symmetrically along the central layer; The outer layer is wood veneer layer or bamboo curtain layer.

Preferably, in the step S4, the number of layers of the bamboo curtain layer is an even number.

Preferably, in the step S5, the post-treatment is a curing process and a machining process, and the curing process specifically includes the following steps: densely stacking the slab after hot pressing in an indoor environment for 14-21 days; The machining treatment is specifically: using machining equipment to trim, saw and sand the cured slab.

As a general inventive concept, the present invention also provides a large-format high-strength weather-resistant bamboo-wood composite material prepared by the aforementioned preparation method, and the density of the large-format high-strength weather-resistant bamboo-wood composite material is 0.7-1.2 g/cm ³ , The length is 4 to 15m, and the width is 1 to 3m.

Compared with the prior art, the advantages of the present invention are:

The method for manufacturing large-format, high-strength and weather-resistant bamboo-wood composite material of the present invention adopts the integrated production technology of dipping and weather-resistant processing when the bamboo and wood inside the slab are stacked in a crisscross pattern during continuous mating processing. The treatment liquid includes phenolic resin adhesive and anti-mildew and anti-corrosive agent. The anti-corrosion and anti-mildew treatment is completed while the dipping process is completed, which simplifies the production process and greatly improves the production efficiency, so that the manufactured bamboo-wood composite material has the weather resistance effect at the same time. , The transverse mechanical strength is greatly enhanced. In addition, the continuous lengthening of the billet processing obtains the bamboo-wood composite material that meets the target length, width and thickness according to actual needs, breaking through the size and specification of the bamboo-wood composite material, and has a wide range of applications.

The large-format, high-strength, weather-resistant bamboo-wood composite material prepared by the present invention has the remarkable characteristics of large format size, strong lateral bonding force, high corrosion resistance and mildew resistance, and the density of the composite material is 0.7～1.2g/cm ³ , and the length is 4～ 15m, the width is 1～3m, the transverse tensile strength can be increased by 30～70%, the anti-mildew and corrosion resistance level reaches the highest level (mildew resistance level 0, corrosion resistance level 1), which can meet the requirements of large-scale engineering materials and engineering components The manufacturing requirements can be widely used in the field of modern bamboo and wood construction.

【Explanation of the drawings】

Figure 1 is a flow chart of the production process in the present invention.

Figure 2 is a schematic diagram of the weaving of bamboo curtain units in the present invention.

Fig. 3 is a schematic diagram of the blank assembly in the thickness direction of the slab according to the present invention.

【Detailed ways】

Hereinafter, the present invention will be further described in detail with reference to the drawings and specific embodiments of the specification. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

Example 1:

As shown in Figure 1, the method for manufacturing a large-format, high-strength and weather-resistant bamboo-wood composite material of this embodiment specifically includes the following steps:

(1) Preparation of bamboo strip unit: cut the fresh bamboo into a bamboo tube with a length of 2m. After brushing and discharging the bamboo, the bamboo tube is processed into a bamboo tube with a length of 2m and a thickness of 2mm using a bamboo scatter machine and a radial slicing machine. Radial bamboo strips.

(2) Bamboo curtain unit weaving: use a braiding machine to weave radial bamboo strips into bamboo curtains, as shown in Figure 2, the distance between adjacent bamboo strips is not more than 2mm, and the distance between adjacent sutures is 0.4m. A bamboo curtain unit with a length of 2m and a width of 2m is obtained.

When woven bamboo strips or bamboo bundles into a bamboo curtain unit, the width of the bamboo curtain unit is equal to the length of the bamboo strip or bamboo bundle, the width of the bamboo curtain unit is 1 to 3 m, and the length of the bamboo curtain unit is 1 to 3 m; adjacent; The distance between bamboo strips or bamboo bundles is not more than 2mm, and the distance between adjacent braided wires is 0.3-0.5m, both of which can achieve the same or similar technical effects.

(3) Drying of bamboo curtain unit and wood veneer: The bamboo curtain unit and the poplar veneer unit with a thickness of 2mm, a length of 2m and a width of 1m are dried by the conventional kiln drying method, and the drying temperature is controlled at 90℃. The bamboo curtain unit and poplar veneer are dried to a final moisture content of about 12%, and the dried bamboo curtain unit and poplar veneer are obtained.

(4) High-pressure immersion treatment: Put the dried bamboo curtain unit and poplar veneer in a high-pressure immersion treatment tank, and then evacuate to a vacuum of 0.06MPa (0.02～0.09MPa can be the same or similar Technical effect), keep for 7 minutes, then inject the mixed treatment liquid to make it completely soaked, and then pressurize to 0.6MPa (0.4～1.0MPa can achieve the same or similar technical effect); after maintaining the pressure for 12 minutes, release the pressure, and then perform post-vacuum treatment , The vacuum degree is 0.06MPa (0.02～0.09MPa can achieve the same or similar technical effect), keep the pressure for 6min and release the pressure, and finally take out the bamboo curtain unit and poplar veneer after the immersion treatment.

The mixed treatment solution used in this example is composed of a phenolic resin adhesive and a high-efficiency anti-mold preservative, wherein the solid content of the phenolic resin is 25%, and the mass ratio of the high-efficiency anti-mold preservative to the mixed treatment solution is 0.05:1. Among the high-efficiency anti-mildew and preservatives, silicone quaternary ammonium salt, 3-iodo-2-propynyl-butyl carbamate, propiconazole and tebuconazole accounted for 18% and 32% of the total mass of the anti-mildew and antiseptic respectively. , 35% and 15%.

In other embodiments, the mass ratio of the high-efficiency anti-mold preservative to the treatment liquid is 0.001-0.05:1, and the high-efficiency anti-mold preservative includes the following components by weight: 15-25% organosilicon quaternary ammonium salt, 3-iodine The same or similar technical effects can also be achieved with 2-propynyl-butyl carbamate 25-35%, propiconazole 30-40% and tebuconazole 5-20%.

(5) Drying and balancing of the impregnated bamboo curtain unit and wood veneer: A mesh belt type hot air dryer is used to dry the impregnated bamboo curtain unit and poplar veneer at a drying temperature of 50°C; after drying, balance In the room, the dipped bamboo curtain unit and poplar veneer are balanced. The temperature of the balance room is controlled at 25℃, the relative humidity is controlled at 70%, and the balance is treated for 12 days. The wind speed in the balance room is controlled at 0.3m/s to obtain a drying balance. The treated impregnated bamboo curtain unit and poplar veneer.

(6) Assembling process: Put the impregnated bamboo curtain unit and poplar veneer after drying and balance treatment on the conveyor belt for continuous vertical and horizontal stacking and long group batch processing; as shown in Figure 3, when assembling the blank, the bamboo curtain layer Layered with poplar veneer layer, the bamboo curtain unit of the bamboo curtain layer is placed longitudinally, the head and the tail are connected, the interfaces of the upper and lower adjacent layers are misaligned, and the adjacent bamboo curtain unit interfaces of the upper and lower adjacent bamboo curtain layers (as shown in Figure 3) The misalignment distance between the splicing joints shown is not less than 30cm, and the number of wood veneer layers does not exceed 40% of the total number of slab layers (the number of wood veneer layers in this embodiment is 3, and the total number of slab layers is 3). The number of slab layers is 15 layers); the number of slab layers follows the principle of odd-numbered layers and symmetrical grouping. The center layer is poplar veneer layer, and the vertical bamboo curtain layer is placed on the outermost surface and bottom surface. For every 3 layers of vertical bamboo curtain layer, another 1 Layers of horizontal poplar wood veneer layers, forming a slab structure with bamboo vertical wood horizontal, upper and lower layers dislocation overlapped inside the slab, resulting in a slab tape with a width of 2m and an infinite extension in the length direction; and then along the slab tape Cut longitudinally in the longitudinal direction to obtain a slab with a length of 8 m and a width of 2 m.

(7) Hot pressing process: The slab is sent to the hot press through the conveyor belt together with the backing plate for hot pressing. The temperature of the hot pressing core layer is controlled at 135℃, the hot pressing pressure is controlled at 4.7MPa, and the hot pressing time The temperature of the core layer of the slab reaches the set temperature for another 15 minutes.

In other embodiments, the temperature of the slab core layer is 130-155°C, the hot pressing pressure is 3-10 MPa, and the same or similar technical effects can be obtained when the temperature of the slab core layer reaches the set temperature for 5-20 minutes.

(8) Curing treatment: stacking the formed slabs after hot pressing. When stacking, the upper and lower formed slabs are separated by spacers with a thickness of 25mm and a width of 35mm, and the slabs are formed in the same layer. Close to each other, the gap between the same layer of spacers is 40cm; the formed slab is placed in the balance warehouse for curing treatment, and the curing time is 15 days.

(9) Machining treatment: After the curing, use a panel saw, a sliding table saw, etc., to machine the cured slab to obtain a large-format, high-strength, weather-resistant bamboo-wood composite material.

The large-format high-strength weather-resistant bamboo-wood composite material produced in this embodiment has a length of 8 m, a width of 2 m, and an actual density of 0.83 g/cm ³ . Compared with the ordinary recombinant bamboo produced by the existing technology, its transverse tensile strength has been increased by 32%, and the anti-mildew and corrosion resistance level has reached the highest level (mildew resistance level 0, corrosion resistance level I), and the bamboo wood has been significantly improved. The shortcomings of composite materials such as small size, weak transverse strength, and poor weather resistance and durability can meet the needs of large-scale bamboo and wood construction materials.

Example 2:

(1) Preparation of bamboo bundle unit: cut fresh moso bamboo into bamboo tubes with a length of 1.5m, split the tubes into bamboo slices with a width of 25mm using a bamboo scatter machine, and then roll them into a horizontally loose, longitudinally penetrating piece with a dispersing machine Unwind bamboo bunches.

(2) Bamboo curtain unit weaving: use a weaving machine to weave bamboo bundles into bamboo curtains, the distance between adjacent bamboo bundles is not more than 2mm, and the distance between adjacent sutures is 0.3m, resulting in a length of 2m and a width of 1.5 m bamboo curtain unit.

When using bamboo bundles to weave the bamboo curtain unit, the size of the bamboo bundle only needs to be evenly matched, and the selection process of bamboo chips is not involved. The production efficiency is higher and it is more suitable for large-scale production.

(3) Drying of bamboo curtain unit and wood veneer unit: The bamboo curtain unit and the eucalyptus veneer with a thickness of 1.5mm, a length of 1m and a width of 1.5m are dried by the conventional kiln drying method, and the drying temperature is controlled at 80 ℃, the bamboo curtain and eucalyptus veneer are dried to the final moisture content of about 12%, and the dried bamboo curtain unit and eucalyptus veneer are obtained.

(4) High-pressure immersion treatment: Put the dried bamboo curtain unit and eucalyptus veneer in a high-pressure immersion treatment tank, and then evacuate to a vacuum of 0.07MPa, keep it for 8 minutes, and then inject the mixed treatment liquid to make it Completely soak, and then pressurize to 0.7MPa; hold the pressure for 15 minutes and then release the pressure, and then perform post-vacuum treatment, the vacuum degree is 0.07MPa, hold for 8 minutes and then release the pressure, and finally take out the bamboo curtain unit and the wood veneer after the immersion treatment .

The mixed treatment liquid used in this example is composed of a phenolic resin adhesive and a high-efficiency anti-mold preservative, wherein the solid content of the phenolic resin adhesive is 28%, and the mass ratio of the high-efficiency anti-mold preservative to the mixed treatment liquid is 0.04:1. Among high-efficiency anti-mildew and preservatives, silicone quaternary ammonium salt, 3-iodo-2-propynyl-butyl carbamate, propiconazole and tebuconazole respectively account for 20% and 30% of the total mass of anti-mildew and preservatives. , 38% and 12%.

(5) Drying and balancing of the impregnated bamboo curtain unit and wood veneer: A mesh belt hot air dryer is used to dry the impregnated bamboo curtain and eucalyptus veneer at a drying temperature of 60°C; after drying, in the balance room Balancing the dipped bamboo curtain and poplar veneer, the temperature of the balance room is controlled at 28℃, the relative humidity is controlled at 75%, the balance treatment is 13d, and the wind speed in the balance room is controlled at 0.4m/s, after drying and balance treatment The impregnated bamboo curtain unit and eucalyptus veneer.

(6) Assembling of blanks: Put the impregnated bamboo curtain unit and eucalyptus veneer after drying and balance treatment on the conveyor belt for vertical and horizontal stacking and batch processing; when forming the blank, the bamboo curtain layer and the wood veneer layer are placed in layers , The bamboo curtain unit of the bamboo curtain layer is placed longitudinally, the head and the tail are connected, the interfaces of the upper and lower adjacent layers are misaligned, and the distance between the interfaces of the adjacent bamboo curtain units of the upper and lower adjacent bamboo curtain layers is not less than 30cm; the slab layer The number follows the principle of odd-numbered layers and symmetrical assembly. The outermost surface, bottom layer and center layer of the slab are eucalyptus veneer layers, and the arrangement direction is vertical. The other layers of bamboo curtain layers and eucalyptus veneer layers inside the slab Follow the principle of wood horizontal and bamboo vertical stacking. For every two vertical bamboo curtain layers, another horizontal eucalyptus veneer layer is placed to form a slab structure with bamboo vertical wood horizontal and upper and lower layers dislocation overlapped inside the slab. A slab belt with a width of 2m and an infinitely extendable length direction; then longitudinally cut along the length of the slab belt to obtain a slab with a length of 12m and a width of 2m.

(7) Hot pressing process: The slab is sent to the hot press through the conveyor belt together with the backing plate for hot pressing. The temperature of the hot pressing core layer is controlled at 140℃, the hot pressing pressure is controlled at 5.5MPa, and the hot pressing time After the core layer temperature of the slab reaches the set temperature, it is maintained for 18 minutes.

(8) Curing treatment: stacking the formed slabs after hot pressing. When stacking, the upper and lower formed slabs are separated by spacers with a thickness of 25mm and a width of 35mm, and the slabs are formed in the same layer. Close to each other, the gap between the spacers of the same layer is 40cm; the formed slab is placed in the balance warehouse for curing treatment, and the curing time is 12 days.

(9) Machining treatment: After the curing, the slab after the curing treatment is processed with a panel saw, a sliding table saw, etc., to obtain a large-format, high-strength, weather-resistant bamboo-wood composite material.

The large-format high-strength weather-resistant bamboo-wood composite material produced in this embodiment has a length of 12 m, a width of 2 m, and an actual density of 1.12 g/cm ³ . Compared with the ordinary recombined bamboo produced by the existing technology, its transverse tensile strength has increased by 45%, and the anti-mildew and corrosion resistance level has reached the highest level (mildew resistance level 0, decay resistance level I), and the bamboo wood is significantly improved. The shortcomings of composite materials such as small size, weak transverse strength, and poor weather resistance and durability can meet the needs of large-scale bamboo and wood construction materials.

Although the present invention has been disclosed as above in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into equivalent implementations of equivalent changes. example. Therefore, all simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

A method for manufacturing large-format, high-strength and weather-resistant bamboo-wood composite material, which is characterized in that it comprises the following steps:

S1. Dry the bamboo curtain unit and wood veneer made of bamboo strips or bamboo bundles until the moisture content is within 15%;

S2. Place the dried bamboo curtain unit and wood veneer in a high-pressure immersion treatment tank, and add a treatment solution for immersion treatment. The treatment solution includes a phenolic resin adhesive and an anti-mildew and preservative. The treatment solution contains phenolic resin. The solid content of the resin adhesive is 20-30%;

S3. The bamboo curtain unit and wood veneer after the immersion treatment are dried and balanced until the moisture content is between 10-20%;

S4. Place the dried and balanced bamboo curtain unit and wood veneer on the conveyor belt for continuous lengthening and assembling process, and cut off when reaching the preset thickness and length to obtain a slab; when assembling the blank, the slab includes There are multiple bamboo curtain layers and multiple wood veneer layers. There are multiple bamboo curtain layers between adjacent wood veneer layers. Each bamboo curtain layer is formed by connecting multiple bamboo curtain units in sequence along the conveyor belt. The wood veneer layer is formed by connecting multiple wood veneers in sequence along the conveyor belt; the fiber direction of the wood veneer inside the slab is perpendicular to the fiber direction of the bamboo curtain unit, and the adjacent bamboo curtain unit interfaces of the adjacent bamboo curtain layers are arranged in a staggered manner ；

S5. The slab is sequentially hot-pressed and post-processed to obtain a large-format, high-strength, weather-resistant bamboo-wood composite.
The manufacturing method according to claim 1, wherein in the step S2, the mass ratio of the anti-mold preservative to the treatment liquid is 0.001 to 0.05:1.
The manufacturing method according to claim 2, wherein the anti-mold preservative comprises the following components by weight: 15-25% of organosilicon quaternary ammonium salt, 3-iodo-2-propynyl-butylamino Formate 25 to 35%, propiconazole 30 to 40% and tebuconazole 5 to 20%.
The manufacturing method according to claim 3, characterized in that: the immersion treatment comprises the following steps: firstly vacuumize the high-pressure immersion treatment tank to a vacuum of 0.02～0.09MPa, keep it for 5～10min, and add the treatment The liquid completely soaks the bamboo curtain unit and wood veneer, pressurize it to 0.4～1.0MPa, keep the pressure for 10～20min and then release the pressure, vacuum again to the vacuum degree of 0.02～0.08MPa, keep it for 5～10min, then release the pressure and take it out Bamboo curtain unit and wood veneer.
The manufacturing method according to any one of claims 1 to 3, characterized in that: in the step S1, when the bamboo strips or bamboo bundles are woven into bamboo curtain units, the bamboo strips or bamboo bundles are stitched in parallel with braided threads , The width of the bamboo curtain unit is equal to the length of the bamboo strips or bamboo bundles, the width of the bamboo curtain unit is 1 to 3m, and the length of the bamboo curtain unit is 1 to 3m; the distance between adjacent bamboo strips or bamboo bundles is not more than 2mm, The distance between adjacent braided wires is 0.3-0.5m.
The manufacturing method according to claim 5, characterized in that: in the step S1, the preparation method of the bamboo strips comprises: cutting fresh moso bamboo into bamboo tubes with a length of 1 to 3 m, and then cutting the bamboo tubes radially or chordally. Divide into bamboo strips with a thickness of 1～3mm;

The preparation method of the bamboo bundles includes: dividing the bamboo tube into bamboo slices with a width of 15-130mm in a radial direction, and then rolling the bamboo slices into loose bamboo bundles that are transversely and longitudinally penetrated.
The manufacturing method according to any one of claims 1 to 3, characterized in that: in the step S3, the temperature of the drying is 50-60°C; the temperature of the equilibrium treatment is 25-32°C, relatively The humidity is 60% to 90%, the treatment time is 10 to 15 days, and the wind speed is 0.1 to 0.5 m/s.
The manufacturing method according to any one of claims 1 to 3, characterized in that: in the step S4, the number of wood veneer layers of the slab does not exceed 40% of the total number of layers of the slab; The length of the slab is 4 to 15m, and the width is 1 to 3m.
The manufacturing method according to any one of claims 1 to 3, characterized in that: in the step S5, during the hot press forming, the temperature of the slab core layer is 130 to 155°C, and the hot pressing pressure is 3 to 10MPa, when the slab core layer temperature reaches the set temperature, keep it for 5-20min.
A large-format high-strength weather-resistant bamboo-wood composite material, characterized in that: prepared by the preparation method of any one of claims 1 to 9, the large-format high-strength weather-resistant bamboo-wood composite material has a density of 0.7-1.2 g/cm 3. The length is 4-15m, and the width is 1-3m.