Processing method of bamboo product

Abstract

The present application relates to bamboo product processing technical field, specifically to a kind of bamboo product processing method, comprising: cross bamboo into bamboo section, then bamboo section is processed into bamboo blank;Collect the bamboo fiber debris generated during bamboo processing, after washing and impurity removal, the bamboo fiber debris is crushed;Modulate composite liquid, including the composite enzyme of xylanase and cellulase, bamboo blank is dried to moisture content 10-12%, laser engraving machine is used to engrave on the area where bamboo blank needs to be laser engraved;Composite liquid is coated or sprayed on the surface of laser engraved area;The present application realizes the recovery of bamboo fiber by collecting and crushing raw materials during bamboo processing. The degradation product of the composite enzyme of xylanase and cellulase is used as the precursor of repair material. Nano-bamboo cellulose and sodium hyaluronate form a network structure under the action of enzyme, nano-bamboo cellulose combines with degradation product to form new crosslinking point and fill the cracks.

Description

Technical Field

[0001] This invention relates to the field of bamboo product processing technology, and specifically to a method for processing bamboo products. Background Technology

[0002] Bamboo products refer to products made from bamboo as raw material, mostly daily necessities, such as bamboo baskets, bamboo sieves, bamboo ladles, bamboo winnowing baskets, bamboo steamers, cooking brooms, bamboo dustpans, bamboo rakes, bamboo carrying poles, bamboo chopsticks, bamboo brooms, bamboo hats, bamboo trays, bamboo backpacks, teacup coasters, etc. Currently, when logos, trademarks, or other images and text need to be engraved on the surface of bamboo products, laser marking is often used. However, during laser engraving, the concentrated energy leads to excessively high local temperatures, causing thermal damage to the bamboo fibers and forming micro-cracks. These cracks expand over time, reducing the strength and lifespan of the bamboo products. Therefore, this paper proposes a processing method for bamboo products that can ensure their lifespan. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a processing method for bamboo products that can guarantee the service life of bamboo products.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A method for processing bamboo products, comprising:

[0006] Step S1: Cut the bamboo into sections, and then process the bamboo sections into shapes to obtain bamboo blanks;

[0007] Step S2: Collect bamboo fiber debris generated during bamboo processing in step S1. After cleaning and removing impurities, crush the bamboo fiber debris to obtain nano-bamboo fibers with a particle size of 50-100nm. Prepare a composite solution with the following proportions: sodium hyaluronate 4-6%, a complex enzyme system of xylanase and cellulase 6-10%, nano-bamboo fibers 25-35%, and the remainder being natural resin.

[0008] Step S3: Dry the bamboo blank obtained in S1 to a moisture content of 10-12%, and use a laser engraving machine to engrave the area of ​​the bamboo blank that needs to be laser engraved.

[0009] Step S4: Immediately after the carving is completed, brush the surface of the laser-carved area to remove the carbonized layer. Then, dry the bamboo blank to a moisture content of less than 5%. After coating or spraying the composite liquid onto the surface of the laser-carved area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours to obtain the finished product.

[0010] Preferably, after coating or spraying the composite liquid onto the surface of the laser-engraved area, the area is placed in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours, and then the laser-engraved area is heated to 70-80°C for 30-60 minutes to obtain the finished product.

[0011] Preferably, after coating or spraying the composite liquid onto the surface of the laser engraving area, the area is placed in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours. The excess composite liquid or the film formed by the composite liquid is then scraped off, and the laser engraving area is heated to 70-80°C for 30-60 minutes to obtain the finished product.

[0012] Preferably, the natural resin is dammar resin or rosin resin.

[0013] Preferably, the laser engraving machine uses a laser wavelength of 1064 nm and an energy density of 0.8 J / cm² during engraving. 2 The pulse frequency is 50kHz.

[0014] Preferably, the composite liquid is coated or sprayed onto the surface of the laser-engraved area and then subjected to ultrasonic treatment.

[0015] Preferably, the composite liquid is coated or sprayed onto the surface of the laser-engraved area in a pressurized chamber.

[0016] Preferably, the bamboo fiber fragments are washed and cleaned to remove impurities, then dried until the moisture content is below 5% before being crushed.

[0017] Preferably, the activity ratio of xylanase to cellulase is 1:1.

[0018] The beneficial effects of this invention are as follows: By collecting bamboo fiber fragments during bamboo processing and then crushing them as raw materials for the composite liquid, bamboo fiber recycling is achieved. The recycled fragments are often too small to be easily recycled, but this invention utilizes their sufficiently small size to facilitate subsequent processing into nano-bamboo fibers, reducing processing difficulty. Laser engraving is performed with a moisture content of 10-12%, avoiding excessive moisture content leading to thermal expansion and cracking, and also avoiding excessive moisture content causing rapid thermal stress concentration and cracking due to poor heat conduction. A composite enzyme of xylanase and cellulase is used. Xylanase (such as endo-β-1,4-xylanase) can randomly cleave the xylan backbone, degrading it into xylooligosaccharides and xylose. Hemicellulose (mainly xylan) in bamboo is an important component of the cell wall, and its degradation can release small molecule sugars. Cellulase (such as exo-β-1,4-glucanase and β-glucosidase) can gradually degrade cellulose microfibers, releasing glucose. Cellulose is the main structural component of bamboo, and its degradation provides the basic monomers for repair. When xylanase and cellulase work together, the degradation of xylan reduces the encapsulation of cellulose by hemicellulose, exposing more cellulose crystalline regions and accelerating the action of cellulase. In damaged areas of bamboo (such as microcracks after laser engraving), xylanase preferentially degrades the damaged hemicellulose, releasing xylooligosaccharides; cellulase then degrades cellulose, releasing glucose. The degradation products (xylooligosaccharides and glucose) serve as precursors for repair materials. Nano-bamboo cellulose and sodium hyaluronate form a network structure under enzymatic action. The nano-bamboo cellulose combines with the degradation products to form new cross-linking points, thus filling the cracks. A large amount of nano-bamboo fiber serves two purposes: partly to provide glucose during decomposition, avoiding excessive degradation of the bamboo itself, and partly as cross-linking points. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating a method for processing bamboo products according to a specific embodiment of the present invention. Detailed Implementation

[0020] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0021] Please refer to Figure 1 A method for processing bamboo products, comprising:

[0022] Step S1: Cut the bamboo into sections, and then process the bamboo sections into shapes to obtain bamboo blanks;

[0023] Step S2: Collect bamboo fiber debris generated during bamboo processing in step S1. After cleaning and removing impurities, crush the bamboo fiber debris to obtain nano-bamboo fibers with a particle size of 50-100nm. Prepare a composite solution with the following proportions: sodium hyaluronate 4-6%, a complex enzyme system of xylanase and cellulase 6-10%, nano-bamboo fibers 25-35%, and the remainder being natural resin.

[0024] Step S3: Dry the bamboo blank obtained in S1 to a moisture content of 10-12%, and use a laser engraving machine to engrave the area of ​​the bamboo blank that needs to be laser engraved.

[0025] Step S4: Immediately after the carving is completed, brush the surface of the laser-carved area to remove the carbonized layer. Then, dry the bamboo blank to a moisture content of less than 5%. After coating or spraying the composite liquid onto the surface of the laser-carved area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours to obtain the finished product.

[0026] As described above, bamboo fiber fragments from bamboo processing are collected, crushed, and used as raw materials for a composite liquid, thus achieving bamboo fiber recycling. However, the recycled fragments are often too small to be easily recycled. This application utilizes these fragments' small size to facilitate subsequent processing into nano-bamboo fibers, reducing processing difficulty. Laser engraving is performed with a moisture content of 10-12%, avoiding excessive moisture content leading to thermal expansion and cracking, and also avoiding excessive moisture content causing rapid thermal stress concentration and cracking due to poor heat conduction. A composite enzyme of xylanase and cellulase is used. Xylanase (such as endo-β-1,4-xylanase) can randomly cleave the xylan backbone, degrading it into xylooligosaccharides and xylose. Hemicellulose (mainly xylan) in bamboo is an important component of the cell wall, and its degradation releases small molecule sugars. Cellulase (such as exo-β-1,4-glucanase and β-glucosidase) can gradually degrade cellulose microfibers, releasing glucose. Cellulose is the main structural component of bamboo, and its degradation provides the basic monomers for repair. When xylanase and cellulase work together, the degradation of xylan reduces the encapsulation of cellulose by hemicellulose, exposing more cellulose crystalline regions and accelerating the action of cellulase. In damaged areas of bamboo (such as microcracks after laser engraving), xylanase preferentially degrades the damaged hemicellulose, releasing xylooligosaccharides; cellulase then degrades cellulose, releasing glucose. The degradation products (xylooligosaccharides and glucose) serve as precursors for repair materials. Nano-bamboo cellulose and sodium hyaluronate form a network structure under enzymatic action. The nano-bamboo cellulose combines with the degradation products to form new cross-linking points, thus filling the cracks. A large amount of nano-bamboo fiber serves two purposes: partly to provide glucose during decomposition, avoiding excessive degradation of the bamboo itself, and partly as cross-linking points.

[0027] Furthermore, after coating or spraying the composite liquid onto the surface of the laser-engraved area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours, and then heat the laser-engraved area to 70-80°C for 30-60 minutes to obtain the finished product.

[0028] As can be seen from the above description, heating can deactivate xylanase and cellulase or reduce their concentration to below 0.1%, thus preventing excessive diffusion of xylanase and cellulase that could lead to further degradation, and also preventing excessively high temperatures from causing cross-linking points to fail.

[0029] Furthermore, after coating or spraying the composite liquid onto the surface of the laser-engraved area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours, scrape off the excess composite liquid or the film formed by the composite liquid, and then heat the laser-engraved area to 70-80°C for 30-60 minutes to obtain the finished product.

[0030] As can be seen from the above description, by scraping off the excess composite liquid or the film formed by the composite liquid, it is possible to avoid pulling or tearing by hand, which would bring out the cross-linked body filling the cracks.

[0031] Furthermore, the natural resin is dammar resin or rosin resin.

[0032] As can be seen from the above description, by using natural resins such as dammar resin or rosin resin, which have antioxidant and antibacterial properties, the glucose produced during the modification process is not easily consumed by bacteria.

[0033] Furthermore, during laser engraving, the laser wavelength is 1064nm and the energy density is 0.8J / cm². 2 The pulse frequency is 50kHz.

[0034] As can be seen from the above description, the laser wavelength of 1064nm belongs to the near-infrared light, which avoids the degradation of bamboo pigments and maintains the original color of bamboo; the low energy density can be kept below the thermal damage threshold of bamboo, avoiding deformation; and the pulse frequency of 50kHz can reduce heat accumulation and thus reduce the generation of cracks.

[0035] Furthermore, after coating or spraying the composite liquid onto the surface of the laser-engraved area, ultrasonic treatment is applied.

[0036] As can be seen from the above description, by using ultrasonic treatment, the composite liquid can be uniformly penetrated into the microporous structure of bamboo, improving the subsequent repair effect and the cross-linking points formed can replenish the mechanical properties of bamboo that have been reduced by laser ablation.

[0037] Furthermore, the composite liquid is applied or sprayed onto the surface of the laser-engraved area within a pressurized chamber.

[0038] As can be seen from the above description, by using a pressurized chamber, the penetration of the composite liquid can be increased, the subsequent repair effect can be improved, and the cross-linking points formed can replenish the mechanical properties of bamboo that have been reduced by laser ablation.

[0039] Furthermore, after cleaning and removing impurities from the bamboo fiber fragments, they are dried until the moisture content is below 5% before being crushed.

[0040] As can be seen from the above description, drying bamboo fiber fragments reduces their toughness, making them easier to crush.

[0041] Furthermore, the activity ratio of xylanase to cellulase is 1:1.

[0042] Example 1

[0043] A method for processing bamboo products, comprising:

[0044] Step S1: Cut the bamboo into sections, and then process the bamboo sections into shapes to obtain bamboo blanks;

[0045] Step S2: Collect bamboo fiber fragments generated during bamboo processing in Step S1. After cleaning and removing impurities, dry the bamboo fiber fragments until the moisture content is below 5%, then crush them to obtain nano-bamboo fibers with a particle size of 50-100nm. Prepare a composite solution with the following proportions: sodium hyaluronate 5%, a composite enzyme system of xylanase and cellulase (activity ratio of 1:1) 8%, nano-bamboo fibers 30%, and the remainder is natural resin 57%; the natural resin is dammar resin.

[0046] Step S3: Dry the bamboo blank obtained in S1 to a moisture content of 10-12%, and then use a laser engraving machine to engrave the areas of the bamboo blank that require laser engraving; the laser wavelength is 1064nm and the energy density is 0.8J / cm³. 2 The pulse frequency is 50kHz.

[0047] Step S4: Immediately after the engraving is completed, brush the surface of the laser-engraved area to remove the carbonized layer. Then, dry the bamboo blank to a moisture content of less than 5%. Apply or spray the composite liquid onto the surface of the laser-engraved area and treat it with ultrasound. After placing it in an environment with a temperature of 25°C and a humidity of 65% for 48 hours, scrape off the excess composite liquid or the film formed by the composite liquid. Then, heat the laser-engraved area to 70-80°C for 30-60 minutes to obtain the finished product.

[0048] Example 2

[0049] A method for processing bamboo products, comprising:

[0050] Step S1: Cut the bamboo into sections, and then process the bamboo sections into shapes to obtain bamboo blanks;

[0051] Step S2: Collect bamboo fiber fragments generated during the processing of moso bamboo in step S1. After cleaning and removing impurities, dry the bamboo fiber fragments until the moisture content is below 5% and then crush them to obtain nano-bamboo fibers with a particle size of 50-100nm. Prepare a composite solution with the following proportions: sodium hyaluronate 6%, a composite enzyme system of xylanase and cellulase (activity ratio of 1:1) 9%, nano-bamboo fibers 32%, and the remainder is natural resin 53%; the natural resin is rosin resin.

[0052] Step S3: Dry the bamboo blank obtained in S1 to a moisture content of 10-12%, and then use a laser engraving machine to engrave the areas of the bamboo blank that require laser engraving; the laser wavelength is 1064nm and the energy density is 0.8J / cm³. 2 The pulse frequency is 50kHz.

[0053] Step S4: Immediately after the engraving is completed, brush the surface of the laser-engraved area to remove the carbonized layer. Then, dry the bamboo blank to a moisture content of less than 5%. When applying or spraying the composite liquid onto the surface of the laser-engraved area, place it in a pressurized chamber and then place it in an environment with a temperature of 25°C and a humidity of 65% for 24 hours. Scrape off the excess composite liquid or the film formed by the composite liquid. Then, heat the laser-engraved area to 70-80°C for 30-60 minutes to obtain the finished product.

[0054] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for processing bamboo products, characterized in that, include: Step S1: Cut the bamboo into sections, and then process the bamboo sections into shapes to obtain bamboo blanks; Step S2: Collect bamboo fiber debris generated during the processing of moso bamboo in step S1. After cleaning and removing impurities, crush the bamboo fiber debris to obtain nano bamboo fibers with a particle size of 50-100nm. The compound solution is prepared with the following proportions: sodium hyaluronate 4-6%, a complex enzyme system of xylanase and cellulase 6-10%, nano bamboo fiber 25-35%, and the remainder being natural resin. Step S3: Dry the bamboo blank obtained in S1 to a moisture content of 10-12%, and use a laser engraving machine to engrave the area of ​​the bamboo blank that needs to be laser engraved. Step S4: Immediately after the carving is completed, brush the surface of the laser-carved area to remove the carbonized layer. Then, dry the bamboo blank to a moisture content of less than 5%. After coating or spraying the composite liquid onto the surface of the laser-carved area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours to obtain the finished product.

2. The processing method for bamboo products according to claim 1, characterized in that, After coating or spraying the composite liquid onto the surface of the laser-engraved area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours. Then, heat the laser-engraved area to 70-80°C for 30-60 minutes to obtain the finished product.

3. The processing method for bamboo products according to claim 2, characterized in that, After coating or spraying the composite liquid onto the surface of the laser engraving area, place it in an environment with a temperature of 25°C and a humidity of 65% for 24-72 hours. Then scrape off the excess composite liquid or the film formed by the composite liquid. Finally, heat the laser engraving area to 70-80°C for 30-60 minutes to obtain the finished product.

4. The processing method for bamboo products according to claim 1, characterized in that, The natural resin is dammar resin or rosin resin.

5. The processing method for bamboo products according to claim 1, characterized in that, The laser engraving machine uses a laser wavelength of 1064nm and an energy density of 0.8J / cm² during engraving. 2 The pulse frequency is 50kHz.

6. The processing method for bamboo products according to claim 1, characterized in that, After coating or spraying the composite liquid onto the surface of the laser-engraved area, ultrasonic treatment is applied.

7. The processing method for bamboo products according to claim 1, characterized in that, The composite liquid is applied or sprayed onto the surface of the laser-engraved area within a pressurized chamber.

8. The processing method for bamboo products according to claim 1, characterized in that, After cleaning and removing impurities, the bamboo fiber fragments are dried until the moisture content is below 5% before being crushed.

9. The method for processing bamboo products according to claim 1, characterized in that, The activity ratio of xylanase to cellulase is 1:1.

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