Novel packaging material using bamboo instead of plastic as well as preparation method and application of novel packaging material

Abstract

The invention relates to the technical field of environment-friendly packaging materials, and discloses a novel packaging material using bamboo to replace plastic as well as a preparation method and application of the novel packaging material, and the packaging material is prepared from the following raw materials in parts by weight: 60-85 parts of bamboo powder; 10-30 parts of a bio-based adhesive; 2-8 parts of a bamboo wood extracting solution; 0.5-5 parts of a reinforcing agent; 1-5 parts of a plasticizer; 0.5-3 parts of a water repellent agent; through the synergistic effect of the bamboo powder, the bio-based adhesive, the reinforcing agent and the bamboo extracting solution, the prepared packaging material has high mechanical strength, good flexibility and certain ductility, and meanwhile, the material is endowed with certain antibacterial and antioxidant properties by adding the bamboo extracting solution; the reinforcing agent obviously improves the mechanical property and the barrier property of the material; and renewable and fast-growing bamboos are used as main raw materials, non-degradable petroleum-based plastics are replaced, the bamboos are short in growth cycle, high in carbon sequestration capacity, wide in raw material source and environmentally friendly, the product can be biodegraded in the natural environment after being discarded, and white pollution is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environment-friendly packaging materials, in particular to a novel packaging material taking bamboo instead of plastic and a preparation method and application thereof. BACKGROUND

[0002] With the increasing global environmental awareness, it has become an urgent task to find sustainable and biodegradable green packaging materials to replace non-degradable petroleum-based plastic packaging. Plastic packaging has been widely used in food, daily necessities, electronic products and other fields due to its light weight, durability, low cost and other advantages, but it is extremely difficult to degrade in the natural environment, causing serious "white pollution" problem, which poses a potential threat to the ecological environment and human health.

[0003] At present, the existing alternative materials such as paper packaging, pulp molding, starch-based materials, polylactic acid (PLA) and other biodegradable plastics have alleviated the environmental pressure to some extent, but each has its own limitations. For example, paper packaging and pulp molding usually have low mechanical strength and poor water resistance; starch-based materials are prone to moisture absorption and have poor stability; although biodegradable plastics such as PLA have excellent performance, they mainly rely on food crops as raw materials, have high cost, and their degradation conditions are relatively harsh.

[0004] Bamboo as a rich renewable resource has the advantages of short growth cycle, high yield, strong carbon sink capacity and good sustainability. Bamboo has high cellulose content and good mechanical performance potential. However, direct application of bamboo in packaging materials often faces problems such as difficult processing, uneven performance, insufficient water resistance and mechanical strength. Although there are studies on bamboo composite materials in the prior art, there is still room for improvement in the compatibility of the composite system, the interfacial bonding force and the comprehensive performance of the final product, which is difficult to completely match the comprehensive performance of traditional plastic packaging materials. Therefore, a novel packaging material taking bamboo instead of plastic and a preparation method and application thereof are proposed. SUMMARY

[0005] The present application aims to provide a novel packaging material taking bamboo instead of plastic and a preparation method and application thereof to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a novel packaging material taking bamboo instead of plastic, which is prepared from the following raw materials by weight:

[0007] 60-85 parts of bamboo powder;

[0008] 10-30 parts of bio-based adhesive;

[0009] 2-8 parts of bamboo extract;

[0010] 0.5-5 parts of reinforcing agent;

[0011] Plasticizer 1-5 parts;

[0012] Hydrophobic agent 0.5-3 parts.

[0013] As preferred, the particle size of the bamboo powder is 50-200 mesh, and the bamboo extract is obtained by water extraction, alcohol extraction or ultrasonic-assisted extraction of bamboo green or bamboo yellow, and then concentrated.

[0014] As preferred, the bio-based adhesive is at least one of starch-based adhesive, plant protein adhesive, lignin-based adhesive or chitosan-based adhesive.

[0015] As preferred, the plasticizer is at least one of glycerol, ethylene glycol, polyethylene glycol, triethyl citrate or epoxy soybean oil.

[0016] As preferred, the hydrophobic agent is at least one of beeswax emulsion, carnauba wax emulsion, alkyl ketone dimer or organosilane coupling agent.

[0017] The present application provides a preparation method of a new type of packaging material with bamboo instead of plastic, comprising the following steps:

[0018] S1, bamboo raw material pretreatment: after cleaning and drying the bamboo, the bamboo is first crushed by a crusher to obtain bamboo material, and then the bamboo material is ground into bamboo powder by a flour mill, and then the bamboo powder is subjected to surface modification treatment, wherein the surface modification treatment uses silane coupling agent, titanate coupling agent or maleic anhydride grafting to modify the bamboo powder;

[0019] S2, bamboo extract preparation: after crushing the bamboo green or bamboo yellow, water, ethanol or a mixture thereof is used as a solvent for extraction, and the extract is filtered and concentrated to obtain the bamboo extract;

[0020] S3, mixing: the pretreated bamboo powder, bio-based adhesive, bamboo extract, reinforcing agent, plasticizer and hydrophobic agent are weighed according to the weight parts, and then put into a high-speed mixer to mix at 40-80℃ for 10-30 minutes to obtain a uniform mixture;

[0021] S4, molding: the mixture is molded by a mold pressing molding process, the mold pressing molding temperature is 120-180℃, the pressure is 5-20MPa, and the time is 5-30 minutes;

[0022] S5, post-treatment: the molded material is cooled, demolded, and then dried at a low temperature of 40-60℃ to obtain the new type of packaging material.

[0023] Preferably, in S1, the crusher comprises a support frame, one end of the support frame is provided with a lower shell, the inside of the lower shell is provided with a crushing assembly, the other end of the support frame is provided with a driving assembly, and the crushing assembly is provided with a feeding assembly.

[0024] Preferably, the crushing assembly comprises a rotating shaft, a crushing roller and a screen mesh, the rotating shaft is rotatably connected to the top of the support frame and penetrates through one side of the lower shell, the crushing roller is mounted on the outer side of the rotating shaft, the screen mesh is fixedly connected to the inside of the lower shell and located below the crushing roller, the bottom of the lower shell is provided with a lower hopper, the inside of the lower hopper is rotatably connected with a connecting shaft, the outer side of the connecting shaft is fixedly sleeved with a spiral blade in the inside of the lower hopper, one end of the lower hopper is fixedly connected with a connecting shell, one end of the connecting shaft extends into the inside of the connecting shell and is fixedly connected with a plurality of rotating plates, and the outer side of the connecting shell is provided with a discharge pipe.

[0025] The driving assembly comprises a first driven belt pulley, a second driven belt pulley and a driving motor, the first driven belt pulley is fixedly sleeved on the outer side of one end of the rotating shaft, one end of the connecting shaft extends to the outer side of the lower hopper and is fixedly connected with the second driven belt pulley, the other end of the support frame is provided with the driving motor, the output shaft of the driving motor is provided with a driving belt pulley, the driving belt pulley and the first driven belt pulley are connected through a belt, and the first driven belt pulley and the second driven belt pulley are connected through a belt.

[0026] Preferably, the feeding assembly comprises two fixed seats, two connecting plates and a pushing roller, the two fixed seats are fixedly connected to the top of one end of the support frame, the two connecting plates are respectively hingedly connected to the inside of the two fixed seats, the pushing roller is rotatably connected between the two connecting plates, an upper shell is mounted on the two connecting plates, one end of the upper shell is mounted on the lower shell, the other end of the upper shell is provided with a feeding hopper, a long groove is formed in the inside of one end of the feeding hopper, the pushing roller is located in the inside of the long groove, a fixed shaft is fixedly connected to the inside of the upper side of the feeding hopper, a plurality of limiting plates are movably sleeved on the outer side of the fixed shaft, the bottom end of the plurality of limiting plates is provided with an inclined surface, one side of one of the connecting plates is provided with a speed reducer, and the output shaft of the speed reducer is connected to the shaft of the pushing roller.

[0027] Preferably, the packaging material is applied in food packaging, electronic product packaging and daily necessity packaging.

[0028] Compared with the prior art, the above technical scheme has the following technical effects:

[0029] 1. The bamboo powder, bio-based adhesive, reinforcing agent and bamboo extract synergistically improve the mechanical strength, flexibility and ductility of the prepared packaging material, the addition of bamboo extract imparts certain antibacterial and antioxidant properties to the material, and the reinforcing agent significantly improves the mechanical properties and barrier properties of the material.

[0030] 2. The addition of hydrophobic agent effectively improves the inherent water absorption of bamboo-based material, improves the water resistance and service life of the material, and the compounding of bio-based adhesive and plasticizer ensures good processing performance of the material, which can adapt to various molding processes. Moreover, the renewable and fast-growing bamboo is used as the main raw material to replace non-degradable petroleum-based plastics. Bamboo has a short growth cycle, strong carbon sink capacity, and the raw material is widely available and environmentally friendly. The product can be biodegraded in the natural environment after being discarded, reducing white pollution.

[0031] 3. The bamboo is inserted into the inside of the feeding hopper, the bamboo pushes the limiting plate to rotate outside the fixed shaft, so that the inclined surface at one end of the limiting plate abuts against the outside of the bamboo, thereby limiting the bamboo. At this time, the bamboo can move into the inside of the shell, and cannot move outward, preventing the bamboo from being ejected into the inside of the feeding hopper under the action of the reverse thrust, improving the safety of bamboo crushing. The teeth on the outside of the pushing roller can push the bamboo to move, without the need for manual pushing, improving the convenience and processing efficiency of bamboo crushing.

[0032] 4. The shaft drives the crushing roller to crush the bamboo, the crushed bamboo is conveyed to the inside of the connecting shell through the spiral blades on the outside of the connecting shaft, and then the bamboo is discharged through the rotating plate and the discharge pipe, so as to facilitate the rapid discharge and collection of the crushed bamboo. The driving motor simultaneously completes the crushing and discharging, improving the reliability of the device operation and reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0034] Figure 1 The schematic diagram of the method of the present application;

[0035] Figure 2 The schematic diagram of the structure of the present application;

[0036] Figure 3 The schematic diagram of the rear view structure of the present application;

[0037] Figure 4 It is a left view schematic diagram of the present application;

[0038] Figure 5 It is a cross-sectional schematic diagram of the present application;

[0039] Figure 6 It is a limiting plate structure schematic diagram of the present application.

[0040] Mark explanation: 1, support frame; 2, lower shell; 31, rotating shaft; 32, crushing roller; 33, screen; 34, lower hopper; 35, connecting shaft; 36, spiral blade; 37, connecting shell; 38, rotating plate; 39, discharge pipe; 41, first driven pulley; 42, second driven pulley; 43, driving motor; 44, driving pulley; 51, fixed seat; 52, connecting plate; 53, pushing roller; 54, upper shell; 55, long slot; 56, feed hopper; 57, fixed shaft; 58, limiting plate; 59, inclined surface; 510, speed reducer motor. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the disclosed content, to enable those skilled in the art to understand and read, and are not used to limit the conditions of the embodiments of the present application, and therefore do not have technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the disclosed technical content.

[0043] Embodiment 1

[0044] Please refer to Figure 1 The present application provides a technical solution: a new type of packaging material using bamboo instead of plastic, which is prepared from the following raw materials by weight: 80 parts of bamboo powder; 15 parts of bio-based adhesive; 6 parts of bamboo extract; 2 parts of reinforcing agent; 3 parts of plasticizer; 2 parts of hydrophobic agent. Through the synergistic effect of bamboo powder, bio-based adhesive, reinforcing agent and bamboo extract, the prepared packaging material has high mechanical strength, good flexibility and certain ductility.

[0045] The particle size of the bamboo powder is 150 meshes, and the renewable and fast-growing bamboo is used as the main raw material to replace the non-degradable petroleum-based plastic.The bamboo has a short growth cycle, strong carbon sink capacity, wide raw material source, and environmental friendliness, and the product can be biodegraded in the natural environment after being discarded, thereby reducing white pollution.The bamboo extract is obtained by concentrating the extract after water extraction, alcohol extraction or ultrasonic-assisted extraction of bamboo green or bamboo yellow.The bamboo extract is added to impart the material with certain antibacterial and antioxidant properties, and the reinforcing agent significantly improves the mechanical properties and barrier properties of the material.

[0046] The bio-based adhesive is at least one of a starch-based adhesive, a plant protein adhesive, a lignin-based adhesive or a chitosan-based adhesive.The plasticizer is at least one of glycerol, ethylene glycol, polyethylene glycol, triethyl citrate or epoxy soybean oil.The combination of the bio-based adhesive and the plasticizer ensures good processing performance of the material, which can adapt to various molding processes.

[0047] The hydrophobic agent is at least one of a beeswax emulsion, a carnauba wax emulsion, an alkyl ketone dimer or an organosilane coupling agent.The inherent water absorption of the bamboo-based material is effectively improved by adding the hydrophobic agent, and the water resistance and service life of the material are improved.

[0048] The application provides a preparation method of a novel packaging material using bamboo instead of plastic, comprising the following steps:

[0049] S1, bamboo raw material pretreatment: after the bamboo is cleaned and dried, the bamboo is first crushed by a crusher to obtain bamboo material, and then the bamboo material is ground into bamboo powder by a flour mill, and then the bamboo powder is subjected to surface modification treatment, wherein the surface modification treatment is performed by using a silane coupling agent, a titanate coupling agent or a maleic anhydride grafting agent to modify the bamboo powder;

[0050] S2, bamboo extract preparation: after the bamboo green or bamboo yellow is crushed, water, ethanol or a mixed solution thereof is used as a solvent for extraction, and the extract is filtered and concentrated to obtain the bamboo extract;

[0051] S3, mixing: the pretreated bamboo powder, the bio-based adhesive, the bamboo extract, the reinforcing agent, the plasticizer and the hydrophobic agent are weighed according to the weight parts, and then put into a high-speed mixer to mix at 60 DEG C for 20 minutes to obtain a uniform mixture;

[0052] S4, molding: the mixture is molded by a mold pressing molding process, the mold pressing molding temperature is 160 DEG C, the pressure is 15 MPa, and the time is 20 minutes;

[0053] S5, post-treatment: the molded material is cooled, demolded, and then dried at a low temperature of 50 DEG C to obtain the novel packaging material.

[0054] The packaging material is applied in food packaging, electronic product packaging and daily necessity packaging.

[0055] Example 2

[0056] Different from example 1: a new type of packaging material replacing plastic with bamboo, the packaging material is prepared from the following weight parts of raw materials: bamboo powder 70 parts; bio-based adhesive 15 parts; bamboo extract 5 parts; reinforcing agent 3 parts; plasticizer 2 parts; hydrophobic agent 1 part.

[0057] The particle size of the bamboo powder is 200 mesh, and the bamboo extract is obtained by concentrating the extract obtained after water extraction, alcohol extraction or ultrasonic assisted extraction of bamboo green or bamboo yellow.

[0058] The bio-based adhesive is at least one of starch-based adhesive, plant protein adhesive, lignin-based adhesive or chitosan-based adhesive.

[0059] The plasticizer is at least one of glycerol, ethylene glycol, polyethylene glycol, triethyl citrate or epoxy soybean oil.

[0060] The hydrophobic agent is at least one of beeswax emulsion, carnauba wax emulsion, alkyl ketone dimer or organosilane coupling agent.

[0061] The present application provides a preparation method of a new type of packaging material replacing plastic with bamboo, comprising the following steps:

[0062] S1, bamboo raw material pretreatment: after washing and drying the bamboo, the bamboo is first crushed by a crusher to obtain bamboo material, then the bamboo material is ground into bamboo powder by a flour mill, and then the bamboo powder is subjected to surface modification treatment, wherein the surface modification treatment is performed by using silane coupling agent, titanate coupling agent or maleic anhydride grafting to modify the bamboo powder;

[0063] S2, bamboo extract preparation: after crushing the bamboo green or bamboo yellow, water, ethanol or a mixture thereof is used as a solvent for extraction, and the extract is filtered and concentrated to obtain the bamboo extract;

[0064] S3, mixing: the pretreated bamboo powder, bio-based adhesive, bamboo extract, reinforcing agent, plasticizer and hydrophobic agent are weighed according to the weight parts, and then put into a high-speed mixer to mix at 40℃ for 30 minutes to obtain a uniform mixture;

[0065] S4, forming: the mixture is formed by a die forming process, the die forming temperature is 180℃, the pressure is 20MPa, and the time is 10 minutes;

[0066] S5, post-treatment: the formed material is cooled, demolded, and then dried at 60℃ to obtain the new type of packaging material.

[0067] The packaging material is applied in food packaging, electronic product packaging and daily necessities packaging.

[0068] Embodiment 3

[0069] Please refer to Figures 2-6 Different from embodiments 1 and 2, in S1, the crusher comprises a support frame 1, one end of the support frame 1 is provided with a lower housing 2, the inside of the lower housing 2 is provided with a crushing assembly, the other end of the support frame 1 is provided with a driving assembly, and the crushing assembly is provided with a feeding assembly.

[0070] The crushing assembly can complete the crushing and rapid discharge and collection of bamboo materials. The crushing assembly comprises a rotating shaft 31, a crushing roller 32 and a screen 33. The rotating shaft 31 is rotatably connected to the top of the support frame 1 and penetrates through one side of the lower housing 2. The crushing roller 32 is installed on the outside of the rotating shaft 31. The screen 33 is fixedly connected to the inside of the lower housing 2 and located below the crushing roller 32. The bottom of the lower housing 2 is provided with a lower hopper 34. The inside of the lower hopper 34 is rotatably connected with a connecting shaft 35. The outside of the connecting shaft 35 is fixedly sleeved with a spiral blade 36 in the inside of the lower hopper 34. One end of the lower hopper 34 is fixedly connected with a connecting housing 37. One end of the connecting shaft 35 extends into the inside of the connecting housing 37 and is fixedly connected with a plurality of rotating plates 38. The outside of the connecting housing 37 is installed with a discharge pipe 39. The crushing roller 32 is driven by the rotating shaft 31 to crush the bamboo materials. The bamboo materials enter the inside of the lower hopper 34 through the screen 33, and then are conveyed to the inside of the connecting housing 37 through the spiral blade 36 on the outside of the connecting shaft 35. Then the bamboo materials are discharged through the rotating plates 38 and the discharge pipe 39.

[0071] The driving assembly can complete the crushing and discharge through the driving motor 43, improve the reliability of the device operation, and reduce the maintenance cost. The driving assembly comprises a first driven pulley 41, a second driven pulley 42 and a driving motor 43. The first driven pulley 41 is fixedly sleeved on the outside of one end of the rotating shaft 31. The other end of the connecting shaft 35 extends to the outside of the lower hopper 34 and is fixedly connected with the second driven pulley 42. The other end of the support frame 1 is installed with the driving motor 43. The output shaft of the driving motor 43 is installed with a driving pulley 44. The driving pulley 44 and the first driven pulley 41 are connected through a belt. The first driven pulley 41 and the second driven pulley 42 are connected through a belt. In order to ensure the safety of the driving assembly of the device, a protective cover can be installed on the outside of the driving assembly to improve the safety. The output shaft of the driving motor 43 drives the driving pulley 44 to rotate. The driving pulley 44 drives the rotating shaft 31 on the first driven pulley 41 to rotate through the belt, so that the crushing roller 32 crushes the bamboo materials. At the same time, the first driven pulley 41 drives the connecting shaft 35 on the second driven pulley 42 to rotate through the belt, so that the connecting shaft 35 conveys the bamboo materials through the spiral blade 36 on the outside.

[0072] The safety and convenience of bamboo crushing can be improved by setting the feeding assembly; the feeding assembly comprises two fixed seats 51, two connecting plates 52 and a pushing roller 53, the two fixed seats 51 are fixedly connected to one end of the top of the support frame 1, the two connecting plates 52 are respectively hingedly connected to the interiors of the two fixed seats 51, the pushing roller 53 is rotationally connected between the two connecting plates 52, a baffle is arranged on the support frame 1 at the front end of the pushing roller 53 for isolating the pushing roller 53 and improving the safety of the device, the two connecting plates 52 are provided with an upper shell 54, one end of the upper shell 54 is mounted on the lower shell 2, the upper shell 54 and the lower shell 2 are fixed by connecting bolts, when maintenance is needed, the connecting bolts between the lower shell 2 and the upper shell 54 are only needed to be disassembled, and then the upper shell 54 can be turned over, so that the crusher can be conveniently maintained; the other end of the upper shell 54 is provided with a feeding hopper 56, a long through slot 55 is formed in one end of the interior of the feeding hopper 56, the pushing roller 53 is located in the interior of the long through slot 55, a fixed shaft 57 is fixedly connected to the interior upper side of the feeding hopper 56, a plurality of limiting plates 58 are movably sleeved on the outer side of the fixed shaft 57, and inclined surfaces 59 are arranged at the bottom ends of the plurality of limiting plates 58; bamboo is inserted into the interior of the feeding hopper 56, the bamboo pushes the limiting plates 58 to rotate on the outer side of the fixed shaft 57, so that the inclined surfaces 59 at one end of the limiting plates 58 abut against the outer side of the bamboo, thereby limiting the bamboo, at this time, the bamboo can move into the interior of the upper shell 54 and cannot move outward, so that the bamboo is prevented from being shot out of the interior of the feeding hopper 56 due to the action of the reverse thrust, and the safety of bamboo crushing is improved; one side of one of the connecting plates 52 is provided with a speed reducer motor 510, the output shaft of the speed reducer motor 510 is connected to the shaft of the pushing roller 53, the pushing roller 53 is driven to rotate by the output shaft of the speed reducer motor 510, and the bamboo can be pushed to move by the teeth on the outer side of the pushing roller 53, without the need for manual pushing by personnel.

[0073] When bamboo needs to be crushed, the switch group controls the driving motor 43 and the speed reducer motor 510 to start, bamboo is inserted into the interior of the feeding hopper 56, the bamboo pushes the limiting plates 58 to rotate on the outer side of the fixed shaft 57, so that the inclined surfaces 59 at one end of the limiting plates 58 abut against the outer side of the bamboo, thereby limiting the bamboo, at this time, the bamboo can move into the interior of the upper shell 54 and cannot move outward, so that the bamboo is prevented from being shot out of the interior of the feeding hopper 56 due to the action of the reverse thrust, and the safety of bamboo crushing is improved, at the same time, the output shaft of the speed reducer motor 510 drives the pushing roller 53 to rotate, the bamboo can be pushed to move by the teeth on the outer side of the pushing roller 53, without the need for manual pushing by personnel, the convenience and processing efficiency of bamboo crushing are improved; since the lower shell 2 and the upper shell 54 are hingedly connected through the fixed seat 51 and the connecting plate 52, when maintenance is needed, the connecting bolts between the lower shell 2 and the upper shell 54 are only needed to be disassembled, and then the upper shell 54 can be turned over, so that the crusher can be conveniently maintained.

[0074] The output shaft of the driving motor 43 drives the driving pulley 44 to rotate, the driving pulley 44 drives the rotating shaft 31 on the first driven pulley 41 to rotate through the belt, the rotating shaft 31 drives the crushing roller 32 to rotate in the lower shell 2 and the upper shell 54, the bamboo material entering the inside of the upper shell 54 can be crushed, the bamboo material entering the inside of the hopper 34 through the screen 33, the connecting shaft 35 on the second driven pulley 42 is driven to rotate through the belt while the first driven pulley 41 rotates, the connecting shaft 35 drives the bamboo material to the inside of the connecting shell 37 through the spiral blade 36 on the outside, then the bamboo material is discharged through the rotating plate 38 and the discharge pipe 39, so that the crushed bamboo material can be quickly discharged and collected, and the crushing and discharging are completed at the same time through the driving motor 43, the reliability of the device is improved, and the maintenance cost is reduced.

[0075] Those skilled in the art will appreciate that features recited in various embodiments and / or claims of the present application can be combined or / and integrated, even if such combinations or integrations are not explicitly recited in the present application. In particular, features recited in various embodiments and / or claims of the present application can be combined and / or integrated in various combinations, without departing from the spirit and teachings of the present application. All such combinations and / or integrations fall within the scope of the present application.

Claims

1. A new type of packaging material made of bamboo instead of plastic, characterized by, The packaging material is prepared from the following raw materials by weight parts: Bamboo powder 60-85 parts; Bio-based adhesive 10-30 parts; Bamboo extract 2-8 parts; Reinforcing agent 0.5-5 parts; Plasticizer 1-5 parts; Hydrophobic agent 0.5-3 parts.

2. A novel packaging material in place of plastic from bamboo as claimed in claim 1, wherein, The particle size of the bamboo powder is 50-200 mesh, and the bamboo extract is obtained by concentrating the extract after water extraction, alcohol extraction or ultrasonic-assisted extraction of bamboo green or bamboo yellow.

3. A novel packaging material in place of plastic from bamboo as claimed in claim 1, wherein, The bio-based adhesive is at least one of starch-based adhesive, plant protein adhesive, lignin-based adhesive or chitosan-based adhesive.

4. A novel packaging material in place of plastic from bamboo as claimed in claim 1, wherein, The plasticizer is at least one of glycerol, ethylene glycol, polyethylene glycol, triethyl citrate or epoxy soybean oil.

5. A novel packaging material in place of plastic from bamboo as claimed in claim 1, wherein, The hydrophobic agent is at least one of beeswax emulsion, carnauba wax emulsion, alkyl ketone dimer or organosilane coupling agent.

6. A method of preparing the novel packaging material of bamboo in place of plastic as claimed in any one of claims 1 to 5, wherein, The method comprises the following steps: S1, bamboo raw material pretreatment: after washing and drying the bamboo, first crush it with a crusher to obtain bamboo material, then grind the bamboo material into bamboo powder with a flour mill, and then perform surface modification treatment on the bamboo powder, which uses silane coupling agent, titanate coupling agent or maleic anhydride grafting to modify the bamboo powder; S2, bamboo extract preparation: after crushing the bamboo green or bamboo yellow, extract it with water, ethanol or a mixture thereof as solvent, filter and concentrate the extract to obtain the bamboo extract; S3, mixing: weigh the pretreated bamboo powder, bio-based adhesive, bamboo extract, reinforcing agent, plasticizer and hydrophobic agent according to the weight parts, put them into a high-speed mixer, mix at 40-80℃ for 10-30 minutes to obtain a uniform mixture; S4, forming: form the mixture by die molding process, the die molding temperature is 120-180℃, the pressure is 5-20MPa, and the time is 5-30 minutes; S5, post-treatment: cool and demold the formed material, then dry it with low-temperature drying at 40-60℃, and the new packaging material is obtained.

7. A process for the preparation of a novel packaging material in place of plastic from bamboo as claimed in claim 6, wherein, In S1, the crusher comprises a support frame (1), one end of the support frame (1) is provided with a lower housing (2), the inside of the lower housing (2) is provided with a crushing assembly, the other end of the support frame (1) is provided with a driving assembly, and the crushing assembly is provided with a feeding assembly.

8. A process for the preparation of a novel packaging material in place of plastic from bamboo as claimed in claim 7, wherein, The crushing assembly comprises a rotating shaft (31), a crushing roller (32) and a screen (33), the rotating shaft (31) is rotatably connected to the top of the support frame (1) and penetrates through one side of the lower shell (2), the crushing roller (32) is installed on the outer side of the rotating shaft (31), and the screen (33) is fixedly connected to the inner side of the lower shell (2) and located below the crushing roller (32); the bottom of the lower shell (2) is provided with a lower hopper (34), the inner side of the lower hopper (34) is rotatably connected with a connecting shaft (35), the outer side of the connecting shaft (35) is fixedly sleeved with a spiral blade (36) in the inner side of the lower hopper (34), one end of the lower hopper (34) is fixedly connected with a connecting shell (37), and the one end of the connecting shaft (35) extends to the inner side of the connecting shell (37) and is fixedly connected with a plurality of rotating plates (38); and the outer side of the connecting shell (37) is installed with a discharge pipe (39). The driving assembly comprises a first driven pulley (41), a second driven pulley (42) and a driving motor (43), the first driven pulley (41) is fixedly sleeved on the outer side of one end of the rotating shaft (31), the one end of the connecting shaft (35) extends to the outer side of the lower hopper (34) and is fixedly connected with the second driven pulley (42), the other end of the support frame (1) is installed with the driving motor (43), the output shaft of the driving motor (43) is installed with a driving pulley (44), the driving pulley (44) and the first driven pulley (41) are connected through a belt, and the first driven pulley (41) and the second driven pulley (42) are connected through a belt.

9. A process for the preparation of a novel packaging material in place of plastic from bamboo as claimed in claim 8, wherein, The feeding assembly comprises two fixed seats (51), two connecting plates (52) and a pushing roller (53), the two fixed seats (51) are fixedly connected to the top of the support frame (1), the two connecting plates (52) are respectively hingedly connected to the inner sides of the two fixed seats (51), and the pushing roller (53) is rotatably connected between the two connecting plates (52); two connecting plates (52) are installed with an upper shell (54), one end of the upper shell (54) is installed on the lower shell (2), the other end of the upper shell (54) is provided with a feeding hopper (56), the inner side of one end of the feeding hopper (56) is provided with a long groove (55), the pushing roller (53) is located in the long groove (55), the inner side of the feeding hopper (56) is fixedly connected with a fixed shaft (57), the outer side of the fixed shaft (57) is movably sleeved with a plurality of limiting plates (58), the bottom end of the plurality of limiting plates (58) is provided with an inclined surface (59), one side of one of the connecting plates (52) is installed with a speed reducer (510), and the output shaft of the speed reducer (510) is connected to the shaft of the pushing roller (53).

10. The use of a new type of packaging material made of bamboo instead of plastic according to any one of claims 1-5, characterized in that, The application of the packaging material in food packaging, electronic product packaging and daily necessity packaging.

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