Split combined comb and processing method thereof
By designing a comb with a detachable bamboo handle and biodegradable plastic teeth, the problem of high labor intensity and plastic pollution in traditional bamboo comb production has been solved, achieving efficient production and environmentally friendly use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG FORESTRY ACAD
- Filing Date
- 2024-11-29
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional bamboo comb production suffers from high labor intensity, low mechanization, and plastic pollution caused by the use of disposable plastic combs.
Design a modular comb with a bamboo handle and biodegradable plastic teeth. The bamboo handle is milled in one piece and treated with an antibacterial agent to improve its antibacterial properties. The comb teeth are detachable and the biodegradable plastic teeth reduce environmental pollution.
It improves production efficiency, reduces labor, enables the reuse of comb handles, reduces environmental pollution, and the comb has good antibacterial and mechanical properties.
Smart Images
Figure CN119550446B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of comb manufacturing technology, and particularly relates to a modular comb and its processing method. Background Technology
[0002] The traditional bamboo comb manufacturing process mainly consists of seven parts: bamboo processing, bamboo grooving, bamboo splicing and gluing, comb face and side polishing, rough shaping, comb back shaping, and varnishing and polishing. Traditional bamboo comb production suffers from high labor intensity, large land area requirements, and low mechanization levels, which have become significant bottlenecks hindering the healthy and sustainable development of the bamboo comb industry. Currently, many hotels and guesthouses provide guests with disposable plastic combs, but these combs are simply discarded after use, posing a serious plastic pollution problem. Summary of the Invention
[0003] This invention provides a modular comb designed to solve the aforementioned problems.
[0004] This invention is achieved as follows: a detachable comb, comprising a handle and comb teeth, wherein the handle and comb teeth are detachably connected; the handle is made of bamboo, and the comb teeth are made of biodegradable plastic.
[0005] Preferably, the back of the comb teeth is provided with a groove for engaging with the comb handle.
[0006] This invention also provides a method for processing the above-mentioned split-type comb, comprising the following steps:
[0007] a. Making the comb handle:
[0008] 1) Cut the bamboo into the designed dimensions;
[0009] 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle.
[0010] b. Making the comb teeth:
[0011] 1) Prepare biodegradable plastic raw materials;
[0012] 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
[0013] Preferably, the polished comb handle undergoes an antibacterial treatment, which includes the following steps:
[0014] Clean the impurities from the polished comb handle with ethanol vacuum ultrasonic for 20-30 minutes.
[0015] Then, steam is introduced to expand the holes, and after cooling, the holes are dried at 40-45℃, and then exposed to ultraviolet light for 5-10 minutes.
[0016] After irradiating the comb handle with ultraviolet light, place it into a culture dish and inject Acetobacter xylinum cellulose fermentation broth. Wrap it up and incubate it at 28-30℃ for 2-4 days. Remove the comb handle and wash it with deionized water 2-3 times.
[0017] The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 10-20 minutes, and soaked for 3-5 hours. The bamboo raw material is then removed and irradiated with a dose of 10-20 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 50-60℃ to obtain the finished comb handle.
[0018] Through antibacterial treatment, the bamboo comb handle acquires excellent antibacterial properties, preventing mold growth in humid conditions. First, impurities are removed, followed by steam pore-expanding to make the bamboo more porous and increase its surface area. Then, during fermentation, bacterial cellulose grows into the bamboo fibers, forming an interwoven network that improves the comb handle's mechanical properties. It also features a large storage space for the antibacterial finishing solution, exhibiting excellent adsorption. Combined with vacuum and ultrasonic assistance, the antibacterial finishing solution penetrates more fully into the bamboo, enhancing its antibacterial properties. Electron beam irradiation treatment further densifies the antibacterial layer on the comb handle surface, improving its water resistance and ensuring a tight bond with the handle, thus enhancing its antibacterial efficacy.
[0019] Preferably, the antibacterial finishing solution is prepared as follows: by weight, take 10-20 parts of chitosan and 8-12 parts of soy protein isolate, add the soy protein isolate to 40-50 parts of deionized water, then add 20-30 parts of ethanol, stir for 30-40 minutes, then add chitosan, and stir for 30-50 minutes to obtain the antibacterial finishing solution.
[0020] By adding chitosan, it has broad-spectrum antibacterial properties. By adding soy protein isolate and using ethanol to end-cap the soy protein isolate to reduce the hydrophilic groups in the protein and improve water resistance, a hydrophobic antibacterial layer is formed on the bamboo, improving the antibacterial and anti-mildew effects.
[0021] Preferably, the biodegradable plastic comprises the following raw materials in parts by weight: 80-100 parts of polypropylene resin, 30-40 parts of polylactic acid, 25-35 parts of modified starch, 6-10 parts of modified mannitol, 1-2 parts of lubricant, and 0.5-1.5 parts of antistatic agent.
[0022] Preferably, the modified starch is prepared as follows: 20-30 parts by weight of corn starch are spread to a thickness of 0.2-0.5 cm and treated with electron beam irradiation at a dose of 80-100 kGy. Then, 1-3 parts of sodium dodecyl sulfate and 60-70 parts of deionized water are added and stirred for 1.5-2 hours. Next, 6-10 parts of maleic anhydride are added and mixed evenly. The mixture is stirred in a constant temperature water bath at 60-70℃ for 60-80 minutes. After filtration, the modified starch is spray-dried to obtain the modified starch. The corn starch is first treated with irradiation to shear and modify the macromolecular chain structure. Then, sodium dodecyl sulfate is added to remove the protein, which makes it easier for the molecular chains to move and rearrange, promoting the optimization of the starch structure. Finally, maleic anhydride is added for grafting reaction to form a stable network system and improve mechanical properties.
[0023] Preferably, the modified mannitol is prepared as follows: 5-10 parts by weight of mannitol are dissolved in 70-80 parts of deionized water, and 1 mol / L hydrochloric acid aqueous solution is added dropwise under stirring until the pH is 3-5, and stirring is continued for 1-2 hours; then 3-5 parts of dopamine hydrochloride are added, and the reaction is carried out in the dark for 1-3 hours under nitrogen protection. The solution after the reaction is dialyzed in deionized water and freeze-dried to obtain modified mannitol. By introducing chemically bonded dopamine into the mannitol structure, the dopamine groups undergo polymerization to form strong chemical bonds, thereby improving mechanical properties.
[0024] Preferably, the lubricant comprises one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol.
[0025] Preferably, the antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylpentylammonium chloride.
[0026] Compared with the prior art, the embodiments of this application have the following main advantages:
[0027] The detachable comb provided by this invention features a comb handle and comb teeth that are detachably connected. The comb handle is made of bamboo, and the comb teeth are made of biodegradable plastic. The bamboo comb handle can be reused, making it more energy-efficient and environmentally friendly. The bamboo is cut into standard sizes and formed in one step using a milling cutter, reducing the number of processes and labor required, thus improving production efficiency. When the comb teeth need to be replaced, they can be removed and replaced directly. The biodegradable plastic comb teeth reduce environmental pollution. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of a modular comb provided by the present invention;
[0029] Figure 2 This is a schematic diagram of the comb handle in a modular comb provided by the present invention;
[0030] Figure 3 This is a flowchart of a processing method for a modular comb provided by the present invention.
[0031] Attached image labels: 1. Comb teeth; 2. Comb handle. Detailed Implementation
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0034] Example 1
[0035] This invention provides a modular comb, such as... Figures 1-2 As shown, the device includes a comb handle 2 and comb teeth 1, which are detachably connected. In this embodiment, the back of the comb teeth 1 is provided with a slot for engaging with the comb handle 2. The comb handle 2 is made of bamboo, and the comb teeth 1 is made of biodegradable plastic.
[0036] like Figure 3 As shown, the processing method of the split-type comb includes the following steps:
[0037] a. Making the comb handle:
[0038] 1) Cut the bamboo into the designed dimensions;
[0039] 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle.
[0040] b. Making the comb teeth:
[0041] 1) Prepare biodegradable plastic raw materials;
[0042] 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
[0043] Furthermore, the polished comb handle undergoes an antibacterial treatment, which includes the following steps:
[0044] The polished comb handle was cleaned of impurities using ethanol vacuum ultrasonic cleaning for 20 minutes.
[0045] Then, water vapor is introduced to expand the holes, and after cooling, the holes are dried at 40°C and then irradiated with ultraviolet light for 5 minutes.
[0046] After being irradiated with ultraviolet light, the comb handle was placed into a culture dish and injected with Acetobacter xylinum cellulose fermentation broth. The dish was then wrapped and incubated at 28°C for 2 days. The comb handle was then removed and washed twice with deionized water.
[0047] The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 10 minutes, and soaked for 3 hours. The bamboo raw material is then removed and irradiated with a dose of 10 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 50°C to obtain the finished comb handle.
[0048] Furthermore, the preparation method of the antibacterial finishing solution is as follows: by weight, take 10 parts of chitosan and 8 parts of soy protein isolate, add the soy protein isolate to 40 parts of deionized water, then add 20 parts of ethanol, stir for 30 minutes, then add chitosan, stir for 30 minutes to obtain the antibacterial finishing solution.
[0049] In this embodiment, the biodegradable plastic comprises the following raw materials in parts by weight: 80 parts polypropylene resin, 30 parts polylactic acid, 25 parts modified starch, 6 parts modified mannitol, 1 part lubricant, and 0.55 parts antistatic agent.
[0050] In a specific implementation, the modified starch is prepared as follows: 20 parts by weight of corn starch are spread evenly to a thickness of 0.2 cm and treated with electron beam irradiation at a dose of 80 kGy. Then, 1 part of sodium dodecyl sulfate and 60 parts of deionized water are added and stirred for 1.5 h. Next, 6 parts of maleic anhydride are added and mixed evenly. The mixture is stirred and reacted in a constant temperature water bath at 60°C for 60 min. After filtration, the modified starch is obtained by spray drying.
[0051] Preferably, the modified mannitol is prepared as follows: 5 parts by weight of mannitol are dissolved in 70 parts of deionized water, and 1 mol / L hydrochloric acid aqueous solution is added dropwise under stirring until the pH is 3, and stirring is continued for 1 hour; then 3 parts of dopamine hydrochloride are added, and the reaction is carried out in the dark for 1 hour under nitrogen protection. The solution after the reaction is dialyzed in deionized water and freeze-dried to obtain modified mannitol.
[0052] In this embodiment, the lubricant includes one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol, and the antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylammonium chloride.
[0053] Example 2
[0054] This invention provides a modular comb, such as... Figures 1-2 As shown, the comb includes a handle and comb teeth, which are detachably connected. In this embodiment, the back of the comb teeth has a groove for engaging with the handle. The handle is made of bamboo, and the comb teeth are made of biodegradable plastic.
[0055] like Figure 3 As shown, the processing method of the split-type comb includes the following steps:
[0056] a. Making the comb handle:
[0057] 1) Cut the bamboo into the designed dimensions;
[0058] 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle.
[0059] b. Making the comb teeth:
[0060] 1) Prepare biodegradable plastic raw materials;
[0061] 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
[0062] Furthermore, the polished comb handle undergoes an antibacterial treatment, which includes the following steps:
[0063] The polished comb handle was cleaned of impurities using ethanol vacuum ultrasonic cleaning for 20 minutes.
[0064] Then, water vapor is introduced to expand the holes, and after cooling, the holes are dried at 40°C and then irradiated with ultraviolet light for 5 minutes.
[0065] After being irradiated with ultraviolet light, the comb handle was placed into a culture dish and injected with Acetobacter xylinum cellulose fermentation broth. The dish was then wrapped and incubated at 28°C for 2 days. The comb handle was then removed and washed twice with deionized water.
[0066] The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 10 minutes, and soaked for 3 hours. The bamboo raw material is then removed and irradiated with a dose of 10 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 50°C to obtain the finished comb handle.
[0067] Furthermore, the preparation method of the antibacterial finishing solution is as follows: by weight, take 10 parts of chitosan and 8 parts of soy protein isolate, add the soy protein isolate to 40 parts of deionized water, then add 20 parts of ethanol, stir for 30 minutes, then add chitosan, stir for 30 minutes to obtain the antibacterial finishing solution.
[0068] In this embodiment, the biodegradable plastic comprises the following raw materials in parts by weight: 85 parts polypropylene resin, 32 parts polylactic acid, 28 parts modified starch, 7 parts modified mannitol, 1.2 parts lubricant, and 0.8 parts antistatic agent.
[0069] In a specific implementation, the modified starch is prepared as follows: 20 parts by weight of corn starch are spread evenly to a thickness of 0.2 cm and treated with electron beam irradiation at a dose of 80 kGy. Then, 1 part of sodium dodecyl sulfate and 60 parts of deionized water are added and stirred for 1.5 h. Next, 6 parts of maleic anhydride are added and mixed evenly. The mixture is stirred and reacted in a constant temperature water bath at 60°C for 60 min. After filtration, the modified starch is obtained by spray drying.
[0070] Preferably, the modified mannitol is prepared as follows: 5 parts by weight of mannitol are dissolved in 70 parts of deionized water, and 1 mol / L hydrochloric acid aqueous solution is added dropwise under stirring until the pH is 3, and stirring is continued for 1 hour; then 3 parts of dopamine hydrochloride are added, and the reaction is carried out in the dark for 1 hour under nitrogen protection. The solution after the reaction is dialyzed in deionized water and freeze-dried to obtain modified mannitol.
[0071] In this embodiment, the lubricant includes one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol, and the antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylammonium chloride.
[0072] Example 3
[0073] This invention provides a modular comb, such as... Figures 1-2 As shown, the comb includes a handle and comb teeth, which are detachably connected. In this embodiment, the back of the comb teeth has a groove for engaging with the handle. The handle is made of bamboo, and the comb teeth are made of biodegradable plastic.
[0074] like Figure 3 As shown, the processing method of the split-type comb includes the following steps:
[0075] a. Making the comb handle:
[0076] 1) Cut the bamboo into the designed dimensions;
[0077] 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle.
[0078] b. Making the comb teeth:
[0079] 1) Prepare biodegradable plastic raw materials;
[0080] 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
[0081] Furthermore, the polished comb handle undergoes an antibacterial treatment, which includes the following steps:
[0082] The polished comb handle was cleaned of impurities using ethanol vacuum ultrasonic cleaning for 25 minutes.
[0083] Then, water vapor is introduced to expand the holes, and after cooling, the holes are dried at 42.5℃ and then irradiated with ultraviolet light for 7.5 minutes.
[0084] After being irradiated with ultraviolet light, the comb handle was placed into a culture dish and injected with Acetobacter xylinum cellulose fermentation broth. The dish was then wrapped and incubated at 29°C for 3 days. The comb handle was then removed and washed twice with deionized water.
[0085] The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 15 minutes, and soaked for 4 hours. The bamboo raw material is then removed and irradiated with a dose of 15 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 55°C to obtain the finished comb handle.
[0086] Furthermore, the preparation method of the antibacterial finishing solution is as follows: by weight, take 15 parts of chitosan and 10 parts of soy protein isolate, add the soy protein isolate to 45 parts of deionized water, then add 25 parts of ethanol, stir for 35 minutes, then add chitosan, stir for 40 minutes to obtain the antibacterial finishing solution.
[0087] In this embodiment, the biodegradable plastic comprises the following raw materials in parts by weight: 90 parts polypropylene resin, 35 parts polylactic acid, 30 parts modified starch, 8 parts modified mannitol, 1.5 parts lubricant, and 1 part antistatic agent.
[0088] In a specific implementation, the modified starch is prepared as follows: 25 parts by weight of corn starch are spread evenly to a thickness of 0.35 cm and treated with electron beam irradiation at a dose of 90 kGy. Then, 2 parts of sodium dodecyl sulfate and 65 parts of deionized water are added and stirred for 1.75 h. Next, 8 parts of maleic anhydride are added and mixed evenly. The mixture is stirred in a constant temperature water bath at 65°C for 70 min. After filtration, the modified starch is obtained by spray drying.
[0089] Preferably, the modified mannitol is prepared as follows: 5-10 parts by weight of mannitol are dissolved in 70-80 parts of deionized water, and 1 mol / L hydrochloric acid aqueous solution is added dropwise under stirring until the pH is 3-5, and stirring is continued for 1-2 hours; then 3-5 parts of dopamine hydrochloride are added, and the reaction is carried out in the dark for 1-3 hours under nitrogen protection. The solution after the reaction is dialyzed in deionized water and freeze-dried to obtain modified mannitol.
[0090] In this embodiment, the lubricant includes one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol, and the antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylammonium chloride.
[0091] Example 4
[0092] This invention provides a modular comb, such as... Figures 1-2 As shown, the comb includes a handle and comb teeth, which are detachably connected. In this embodiment, the back of the comb teeth has a groove for engaging with the handle. The handle is made of bamboo, and the comb teeth are made of biodegradable plastic.
[0093] like Figure 3 As shown, the processing method of the split-type comb includes the following steps:
[0094] a. Making the comb handle:
[0095] 1) Cut the bamboo into the designed dimensions;
[0096] 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle.
[0097] b. Making the comb teeth:
[0098] 1) Prepare biodegradable plastic raw materials;
[0099] 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
[0100] Furthermore, the polished comb handle undergoes an antibacterial treatment, which includes the following steps:
[0101] The polished comb handle was cleaned of impurities using ethanol vacuum ultrasonic cleaning for 30 minutes.
[0102] Then, water vapor is introduced to expand the holes, and after cooling, the holes are dried at 45°C and then irradiated with ultraviolet light for 10 minutes.
[0103] After being irradiated with ultraviolet light, the comb handle was placed into a culture dish and injected with Acetobacter xylinum cellulose fermentation broth. The dish was then wrapped and incubated at 30°C for 4 days. The comb handle was then removed and washed three times with deionized water.
[0104] The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 20 minutes, and soaked for 5 hours. The bamboo raw material is then removed and irradiated with a dose of 20 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 60°C to obtain the finished comb handle.
[0105] Furthermore, the preparation method of the antibacterial finishing solution is as follows: by weight, take 20 parts of chitosan and 12 parts of soy protein isolate, add the soy protein isolate to 50 parts of deionized water, then add 30 parts of ethanol, stir for 40 minutes, then add chitosan, stir for 50 minutes to obtain the antibacterial finishing solution.
[0106] In this embodiment, the biodegradable plastic comprises the following raw materials in parts by weight: 95 parts polypropylene resin, 38 parts polylactic acid, 32 parts modified starch, 9 parts modified mannitol, 1.8 parts lubricant, and 1.2 parts antistatic agent.
[0107] In a specific implementation, the modified starch is prepared as follows: 30 parts by weight of corn starch are spread evenly to a thickness of 0.5 cm and treated with electron beam irradiation at a dose of 100 kGy. Then, 3 parts of sodium dodecyl sulfate and 70 parts of deionized water are added and stirred for 1.2 h. Next, 10 parts of maleic anhydride are added and mixed evenly. The mixture is stirred and reacted in a constant temperature water bath at 70°C for 80 min. After filtration, the modified starch is obtained by spray drying.
[0108] Preferably, the modified mannitol is prepared as follows: 10 parts by weight of mannitol are dissolved in 80 parts of deionized water, and 1 mol / L hydrochloric acid aqueous solution is added dropwise under stirring until the pH is 5, and stirring is continued for 2 hours; then 5 parts of dopamine hydrochloride are added, and the reaction is carried out in the dark for 3 hours under nitrogen protection. The solution after the reaction is dialyzed in deionized water and freeze-dried to obtain modified mannitol.
[0109] In this embodiment, the lubricant includes one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol, and the antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylammonium chloride.
[0110] Example 5
[0111] This invention provides a modular comb, such as... Figures 1-2 As shown, the comb includes a handle and comb teeth, which are detachably connected. In this embodiment, the back of the comb teeth has a groove for engaging with the handle. The handle is made of bamboo, and the comb teeth are made of biodegradable plastic.
[0112] like Figure 3 As shown, the processing method of the split-type comb includes the following steps:
[0113] a. Making the comb handle:
[0114] 1) Cut the bamboo into the designed dimensions;
[0115] 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle.
[0116] b. Making the comb teeth:
[0117] 1) Prepare biodegradable plastic raw materials;
[0118] 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
[0119] Furthermore, the polished comb handle undergoes an antibacterial treatment, which includes the following steps:
[0120] The polished comb handle was cleaned of impurities using ethanol vacuum ultrasonic cleaning for 30 minutes.
[0121] Then, water vapor is introduced to expand the holes, and after cooling, the holes are dried at 45°C and then irradiated with ultraviolet light for 10 minutes.
[0122] After being irradiated with ultraviolet light, the comb handle was placed into a culture dish and injected with Acetobacter xylinum cellulose fermentation broth. The dish was then wrapped and incubated at 30°C for 4 days. The comb handle was then removed and washed three times with deionized water.
[0123] The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 20 minutes, and soaked for 5 hours. The bamboo raw material is then removed and irradiated with a dose of 20 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 60°C to obtain the finished comb handle.
[0124] Furthermore, the preparation method of the antibacterial finishing solution is as follows: by weight, take 20 parts of chitosan and 12 parts of soy protein isolate, add the soy protein isolate to 50 parts of deionized water, then add 30 parts of ethanol, stir for 40 minutes, then add chitosan, stir for 50 minutes to obtain the antibacterial finishing solution.
[0125] In this embodiment, the biodegradable plastic comprises the following raw materials in parts by weight: 100 parts polypropylene resin, 40 parts polylactic acid, 35 parts modified starch, 10 parts modified mannitol, 2 parts lubricant, and 0.15 parts antistatic agent.
[0126] In a specific implementation, the modified starch is prepared as follows: 30 parts by weight of corn starch are spread evenly to a thickness of 0.5 cm and treated with electron beam irradiation at a dose of 100 kGy. Then, 3 parts of sodium dodecyl sulfate and 70 parts of deionized water are added and stirred for 1.2 h. Next, 10 parts of maleic anhydride are added and mixed evenly. The mixture is stirred and reacted in a constant temperature water bath at 70°C for 80 min. After filtration, the modified starch is obtained by spray drying.
[0127] Preferably, the modified mannitol is prepared as follows: 10 parts by weight of mannitol are dissolved in 80 parts of deionized water, and 1 mol / L hydrochloric acid aqueous solution is added dropwise under stirring until the pH is 5, and stirring is continued for 2 hours; then 5 parts of dopamine hydrochloride are added, and the reaction is carried out in the dark for 3 hours under nitrogen protection. The solution after the reaction is dialyzed in deionized water and freeze-dried to obtain modified mannitol.
[0128] In this embodiment, the lubricant includes one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol, and the antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylammonium chloride.
[0129] Comparative Example 1
[0130] Compared with Example 3, the antibacterial treatment steps do not include "putting the comb handle after ultraviolet irradiation into a culture dish and injecting Acetobacter xylinum cellulose fermentation broth, wrapping it up, incubating it at 29°C for 3 days, and then taking out the comb handle and washing it twice with deionized water".
[0131] Comparative Example 2
[0132] Compared with Example 3, the antibacterial treatment step does not include "irradiation treatment with a dose of 15 kGy".
[0133] Comparative Example 3
[0134] Compared with Example 3, the soy protein isolate in the preparation method of the antibacterial finishing solution was replaced with an equal amount of deionized water.
[0135] Comparative Example 4
[0136] Compared to Example 3, no antibacterial treatment was applied to the comb handle.
[0137] Comparative Example 5:
[0138] Compared to Example 3, the modified starch in the biodegradable plastic raw material was replaced with ordinary starch.
[0139] Comparative Example 6
[0140] Compared to Example 3, the modified mannitol in the biodegradable plastic raw material was replaced with ordinary mannitol.
[0141] Comparative Example 7
[0142] Compared to Example 3, the modified starch in the biodegradable plastic raw material was replaced with ordinary starch and the modified mannitol was replaced with ordinary mannitol.
[0143] Comparative Example 8
[0144] Plastic combs are currently used in hotels.
[0145] Performance Test 1: In accordance with the test method for anti-mildew performance in GB / T18261-2013, Aspergillus niger (mold) and Diplocosaurus cocovenenans (color-changing fungus) were used to test the anti-mildew performance of the comb handles of Examples 1-5 and Comparative Examples 1-4. The anti-mildew efficacy E was used to characterize the anti-mildew performance. The test results are shown in Table 1 below.
[0146] E = (1-D1 / D0)*100%; where, 1. Prevention and control efficacy, %; D1 - average infection value of the test sample; D0 - average infection value of the untreated control sample.
[0147] Table 1. Test results of the anti-mildew performance of the comb handle
[0148] Test group Mold control efficacy (%) Efficacy in controlling discoloration bacteria (%) Example 1 95 89 Example 2 96 90 Example 3 98 93 Example 4 97 92 Example 5 96 91 Comparative Example 1 80 75 Comparative Example 2 85 80 Comparative Example 3 86 82 Comparative Example 4 0 0
[0149] The results above show that the comb handle prepared by this invention has good antibacterial and antifungal effects and can extend its service life.
[0150] Performance Test 2: The mechanical properties of the biodegradable plastic comb teeth of Examples 1-5 and Comparative Examples 5-7 were tested according to GB / T-1040.1-2006. The test results are shown in Table 2 below:
[0151] Table 2 Mechanical properties of biodegradable plastic comb teeth
[0152] Test group Tensile strength (MPa) Elongation at break (%) Example 1 26.0 163 Example 2 26.2 165 Example 3 26.5 168 Example 4 26.3 166 Example 5 26.1 165 Comparative Example 5 13.5 112 Comparative Example 6 13.7 115 Comparative Example 7 6.8 80 Comparative Example 8 6.6 81
[0153] The results above show that the biodegradable plastic comb teeth prepared by this invention have good mechanical properties. In particular, the combination of modified starch and modified mannitol has a synergistic effect, which can further improve the mechanical properties and make the comb teeth less prone to damage during use.
[0154] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.
[0155] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.
Claims
1. A modular comb, characterized in that, It includes a comb handle and comb teeth, the comb handle and comb teeth are detachably connected, the comb handle is made of bamboo, and the comb teeth are made of biodegradable plastic; The comb handle undergoes an antibacterial treatment, which includes the following steps: Clean the impurities from the polished comb handle with ethanol vacuum ultrasonic for 20-30 minutes. Then, steam is introduced to expand the holes, and after cooling, the holes are dried at 40-45℃, and then exposed to ultraviolet light for 5-10 minutes. After irradiating the comb handle with ultraviolet light, place it into a culture dish and inject Acetobacter xylinum cellulose fermentation broth. Wrap it up and incubate it at 28-30℃ for 2-4 days. Remove the comb handle and wash it with deionized water 2-3 times. The cleaned comb handle is immersed in an antibacterial finishing solution, vacuumed to below 0.01 MPa, ultrasonically treated for 10-20 minutes, and soaked for 3-5 hours. The bamboo raw material is then removed and irradiated with a dose of 10-20 kGy. Finally, the surface impurities are cleaned with deionized water and dried at 50-60℃ to obtain the finished comb handle. The antibacterial finishing solution is prepared as follows: by weight, take 10-20 parts of chitosan and 8-12 parts of soy protein isolate, add the soy protein isolate to 40-50 parts of deionized water, then add 20-30 parts of ethanol, stir for 30-40 minutes, then add chitosan, stir for 30-50 minutes to obtain the antibacterial finishing solution.
2. The modular comb as described in claim 1, characterized in that, The back of the comb teeth is provided with a slot for engaging with the comb handle.
3. The processing method of the split-type comb as described in claim 1 or 2, characterized in that, Includes the following steps: a. Making the comb handle: 1) Cut the bamboo into the designed dimensions; 2) The cut bamboo is shaped in one go using a milling cutter, and then polished to obtain the comb handle; b. Making the comb teeth: 1) Prepare biodegradable plastic raw materials; 2) After mixing the raw materials, add them to the injection molding equipment and injection mold to obtain comb teeth.
4. The processing method of the split-type comb as described in claim 3, characterized in that, The biodegradable plastic comprises the following raw materials in parts by weight: 80-100 parts polypropylene resin, 30-40 parts polylactic acid, 25-35 parts modified starch, 6-10 parts modified mannitol, 1-2 parts lubricant, and 0.5-1.5 parts antistatic agent.
5. The processing method of the split-type comb as described in claim 4, characterized in that, The modified starch is prepared as follows: 20-30 parts by weight of corn starch are spread evenly to a thickness of 0.2-0.5 cm and treated with electron beam irradiation at a dose of 80-100 kGy. Then, 1-3 parts of sodium dodecyl sulfate and 60-70 parts of deionized water are added and stirred for 1.5-2 hours. Next, 6-10 parts of maleic anhydride are added and mixed evenly. The mixture is stirred in a constant temperature water bath at 60-70℃ for 60-80 minutes. After filtration, the modified starch is obtained by spray drying.
6. The processing method of the split-type comb as described in claim 4, characterized in that, The modified mannitol is prepared as follows: Take 5-10 parts by weight of mannitol and dissolve it in 70-80 parts of deionized water. Add 1 mol / L hydrochloric acid aqueous solution dropwise under stirring until the pH is 3-5, and continue stirring for 1-2 hours. Then add 3-5 parts of dopamine hydrochloride and react in the dark under nitrogen protection for 1-3 hours. Dialyze the solution after reaction in deionized water and freeze-dry to obtain modified mannitol.
7. The processing method of the split-type comb as described in claim 4, characterized in that, The lubricant includes one or more combinations of pentaerythritol, butyl stearate, and stearyl alcohol.
8. The processing method of the split-type comb as described in claim 4, characterized in that, The antistatic agent includes at least one of stearyltrimethylammonium chloride and stearyldimethylpentylammonium chloride.