A method for making a carton and a carton
By using a mixture of natural chrysanthemum stem and lotus seedpod fiber pulp with long fiber pulp and short fiber reinforced pulp, combined with cold pressing and hot pressing processes, the problem of pungent odor caused by chemical additives has been solved, achieving odor improvement and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ACCESS BUSINESS GROUP INTERNATIONAL LLC
- Filing Date
- 2023-06-21
- Publication Date
- 2026-06-23
Smart Images
Figure CN118273166B_ABST
Abstract
Description
[0001] Cross-reference to related applications
[0002] This application claims priority to Chinese Patent Application No. 202211735634.2, filed on December 30, 2022, entitled “A method for making a packaging box and a packaging box”, the entire contents of which are incorporated herein by reference. Technical Field
[0003] This application relates to the field of packaging technology, and more particularly to a method for making a packaging box and the packaging box itself. Background Technology
[0004] Existing paper packaging boxes are typically made from raw materials such as bamboo pulp, bagasse, straw, wood pulp, recycled waste cardboard boxes, and recycled paper using a pulp molding process. However, the current pulping process uses one or more chemical additives, which often have a pungent odor, resulting in packaging boxes with a similar odor. Furthermore, after the pulp molding process, some packaging boxes are bonded with adhesives, leaving behind a chemical odor from the adhesives. These odors can negatively impact user comfort. Summary of the Invention
[0005] This application provides a method for manufacturing a packaging box and a packaging box for improving the odor of the packaging box, thereby enhancing user comfort.
[0006] Firstly, this application provides a method for manufacturing packaging boxes. Specifically, the method may include: processing a slurry using a molding process to obtain the packaging box. The slurry may contain chrysanthemum stem pulp, long-fiber pulp, and short-fiber reinforcing pulp. In the method of this application, the slurry for the packaging box is a mixture of natural chrysanthemum stem pulp, long-fiber pulp, and short-fiber reinforcing pulp, without the need for adding chemical additives with pungent odors, thereby improving the odor of the finished packaging box and enhancing user comfort.
[0007] The preparation steps for the above-mentioned slurry may specifically include:
[0008] Chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp are mixed simultaneously to obtain pulp solution;
[0009] Dilute the original slurry with water.
[0010] After mixing chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp, the long fibers in the long fiber pulp and the short fibers in the short fiber reinforced pulp form an interwoven frame. The chrysanthemum stem pulp is filled more evenly in the frame, thereby improving the density of the frame and enhancing the strength of the packaging box.
[0011] In this application, the dry weight ratio of chrysanthemum stem pulp to slurry ranges from 4% to 6%. For example, in one possible technical solution, chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp can be mixed in a dry weight ratio of 5:55:40, which is beneficial for the molding of the packaging box.
[0012] In addition, the beating degree of the pulp can be between 25°SR and 35°SR, such as 25°SR, 25.3°SR, 25.9°SR, 26°SR, 26.8°SR, 27.5°SR, 29.4°SR, 31°SR, 31.5°SR, 31.69°SR, 32°SR, 32.8°SR, 32.91°SR, 33°SR, 34.3°SR, 34.68°SR, 35°SR, etc., without specific limitations. This makes the packaging box less prone to cracking after molding, thus increasing its strength.
[0013] In some technical solutions, the preparation of the aforementioned chrysanthemum stem pulp may specifically include:
[0014] Prepare chrysanthemum stem pulp fiber;
[0015] Chrysanthemum stem pulp fiber is mixed with water to obtain chrysanthemum stem pulp.
[0016] In this application, the chrysanthemum stem pulp is made from natural dried chrysanthemum stem pulp fiber and water, without the addition of chemical additives with a pungent odor. Thus, the finished packaging box has the scent of chrysanthemum stems, thereby improving the odor of the packaging box.
[0017] In this application, the long-fiber pulp can be bamboo pulp and / or long-fiber wood pulp. Specifically, in some technical solutions, the long-fiber pulp is bamboo pulp; or in other technical solutions, the long-fiber pulp is long-fiber wood pulp; or in still other technical solutions, the long-fiber pulp is a mixed pulp of bamboo pulp and long-fiber wood pulp. No specific limitations are made here.
[0018] In addition, the short fiber reinforced pulp can be bagasse and / or short fiber wood pulp. Specifically, in some technical solutions, the short fiber reinforced pulp is bagasse; or, in other technical solutions, the short fiber reinforced pulp is short fiber wood pulp; or, in still other technical solutions, the short fiber reinforced pulp is a mixed pulp of bagasse and short fiber wood pulp. No specific limitations are imposed here.
[0019] In the above technical solution, the processing of slurry using a molding process may specifically include:
[0020] Fill the mold with the slurry;
[0021] The slurry in the mold is dehydrated using a cold pressing process and / or a hot pressing process to obtain a semi-finished packaging box.
[0022] Remove the mold and die-cut the semi-finished packaging box to obtain the packaging box.
[0023] During the slurry processing, dehydration can be carried out directly in the mold, and after removing the mold and die-cutting, packaging boxes can be obtained directly without additional processing, thus simplifying the packaging box production process.
[0024] The moisture content of the aforementioned semi-finished packaging boxes is 5% to 7%, which makes the semi-finished packaging boxes stronger and less prone to cracking.
[0025] When using the above-mentioned cold pressing and hot pressing processes to dehydrate the slurry in the mold, the cold pressing process can be used first to dehydrate the slurry, and then the hot pressing process can be implemented. This can shorten the time of implementing the hot pressing process, reduce heat energy consumption, and thus reduce the production cost of the packaging box.
[0026] Secondly, this application also provides a packaging box. This packaging box is manufactured using the method described in the first aspect. The packaging box is made from a mixture of natural chrysanthemum stem pulp, long-fiber pulp, and short-fiber reinforcing pulp, without the need for added chemical additives with pungent odors, thereby improving the odor of the packaging box and enhancing user comfort.
[0027] Thirdly, this application provides a method for manufacturing packaging boxes. Specifically, this method may include: processing a slurry using a molding process to obtain the packaging box. The slurry may contain lotus seed slurry, long fiber slurry, and short fiber reinforcing slurry. In the method of this application, the slurry for the packaging box is a mixture of natural lotus seed slurry, long fiber slurry, and short fiber reinforcing slurry, without the need for adding chemical additives with pungent odors, thereby improving the odor of the finished packaging box and enhancing user comfort.
[0028] The preparation steps for the above-mentioned slurry may specifically include:
[0029] Lotus seed pod fiber pulp, long fiber pulp and short fiber reinforced pulp are mixed simultaneously to obtain pulp solution;
[0030] Dilute the original slurry with water.
[0031] After mixing lotus seed pod fiber pulp, long fiber pulp, and short fiber reinforced pulp, the long fibers in the long fiber pulp and the short fibers in the short fiber reinforced pulp form an interwoven frame. The lotus seed pod fiber pulp fills the frame relatively evenly, thereby improving the density of the frame and enhancing the strength of the packaging box.
[0032] In this application, the dry weight ratio of lotus seed slurry to pulp is between 4% and 6%. For example, in one possible solution, lotus seed slurry, long fiber slurry, and short fiber reinforcing slurry can be mixed in a dry weight ratio of 5:55:40, which is beneficial for the molding of the packaging box.
[0033] In addition, the beating degree of the pulp can be between 25°SR and 35°SR, such as 25°SR, 25.3°SR, 25.9°SR, 26°SR, 26.8°SR, 27.5°SR, 29.4°SR, 31°SR, 31.5°SR, 31.69°SR, 32°SR, 32.8°SR, 32.91°SR, 33°SR, 34.3°SR, 34.68°SR, 35°SR, etc., without specific limitations. This makes the packaging box less prone to cracking after molding, thus increasing its strength.
[0034] In some technical solutions, the preparation of the aforementioned lotus seedpod fiber pulp may specifically include:
[0035] Prepare dried lotus seed spores and fiber;
[0036] The dried lotus seed pulp fiber is mixed with water to obtain lotus seed pulp fiber raw material.
[0037] In this application, the lotus seed pod fiber pulp is made from natural dried lotus seed pod pulp fiber and water, without the addition of chemical additives with a pungent odor. Thus, the finished packaging box has the scent of lotus seed pods, thereby improving the odor of the packaging box.
[0038] In this application, the long-fiber pulp can be bamboo pulp and / or long-fiber wood pulp. Specifically, in some technical solutions, the long-fiber pulp is bamboo pulp; or in other technical solutions, the long-fiber pulp is long-fiber wood pulp; or in still other technical solutions, the long-fiber pulp is a mixed pulp of bamboo pulp and long-fiber wood pulp. No specific limitations are made here.
[0039] In addition, the short fiber reinforced pulp can be bagasse and / or short fiber wood pulp. Specifically, in some technical solutions, the short fiber reinforced pulp is bagasse; or, in other technical solutions, the short fiber reinforced pulp is short fiber wood pulp; or, in still other technical solutions, the short fiber reinforced pulp is a mixed pulp of bagasse and short fiber wood pulp. No specific limitations are imposed here.
[0040] In the above technical solution, the processing of slurry using a molding process may specifically include:
[0041] Fill the mold with the slurry;
[0042] The slurry in the mold is dehydrated using a cold pressing process and / or a hot pressing process to obtain a semi-finished packaging box.
[0043] Remove the mold and die-cut the semi-finished packaging box to obtain the packaging box.
[0044] During the slurry processing, dehydration can be carried out directly in the mold, and after removing the mold and die-cutting, packaging boxes can be obtained directly without additional processing, thus simplifying the packaging box production process.
[0045] The moisture content of the aforementioned semi-finished packaging boxes is 5% to 7%, which makes the semi-finished packaging boxes stronger and less prone to cracking.
[0046] When using the above-mentioned cold pressing and hot pressing processes to dehydrate the slurry in the mold, the cold pressing process can be used first to dehydrate the slurry, and then the hot pressing process can be implemented. This can shorten the time of implementing the hot pressing process, reduce heat energy consumption, and thus reduce the production cost of the packaging box.
[0047] Fourthly, this application also provides a packaging box. This packaging box is manufactured using the method described in the third aspect above. The packaging box is made from a mixture of natural lotus seed pulp, long fiber pulp, and short fiber reinforcing pulp, without the need for added chemical additives with pungent odors, thereby improving the odor of the packaging box and enhancing user comfort. Attached Figure Description
[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0049] Figure 1 This is a flowchart illustrating the method for manufacturing packaging boxes in an embodiment of this application;
[0050] Figure 2 This is a schematic diagram of the slurry preparation process in an embodiment of this application;
[0051] Figure 3 This is a schematic diagram of the process for preparing chrysanthemum stem pulp in an embodiment of this application;
[0052] Figure 4 This is a schematic diagram of the process for processing slurry using a molding process in an embodiment of this application;
[0053] Figure 5 This is another flowchart illustrating the method for manufacturing packaging boxes in this application embodiment;
[0054] Figure 6This is another schematic diagram of the slurry preparation process in an embodiment of this application;
[0055] Figure 7 This is a schematic diagram of the process for preparing lotus seedpod fiber pulp in an embodiment of this application;
[0056] Figure 8 This is another schematic diagram of the process of processing slurry using a molding process in an embodiment of this application. Detailed Implementation
[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some embodiments of the technical solutions of this application, and not all embodiments. Based on the embodiments recorded in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the technical solutions of this application.
[0058] The design concept of the embodiments of this application will be introduced below.
[0059] Currently, most packaging boxes are made using a pulping process. During this process, one or more chemical additives are added to the pulp, depending on the specific raw materials, structural strength requirements, and application scenarios. These additives typically have a pungent odor, which contributes to the pungent smell of the finished packaging boxes. Furthermore, in some packaging box manufacturing processes, chemical adhesives may be used to bond the semi-finished packaging boxes after the pulp molding process to obtain the final product. The presence of these chemical adhesives also contributes to the pungent odor of the packaging boxes.
[0060] In view of this, embodiments of this application provide a method for manufacturing a packaging box and a packaging box for improving the odor of the packaging box, thereby improving user comfort.
[0061] The methods of the embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.
[0062] Figure 1 This is a flowchart illustrating a method for manufacturing packaging boxes according to an embodiment of this application. Figure 1 As shown, the method may specifically include:
[0063] Step S101: Process the slurry using a molding process to obtain a packaging box, wherein the slurry includes chrysanthemum stem slurry, long fiber slurry and short fiber reinforced slurry.
[0064] In the method of this application embodiment, the pulp of the packaging box is made by mixing natural chrysanthemum stem pulp with long fiber pulp and short fiber reinforcing pulp, without the need to add chemical additives with pungent odors, thereby improving the odor of the finished packaging box and enhancing the user's comfort.
[0065] Furthermore, the chrysanthemum stem pulp in this application can be made from annual or perennial chrysanthemums. Taking annual chrysanthemums as an example, after harvesting during the flowering season, most of the chrysanthemum stems are burned, with only a small amount remaining for composting. This disposal not only poses safety hazards but also generates air pollutants. Therefore, the utilization rate of most chrysanthemum stems from annual chrysanthemums is low. Of course, the situation is similar for perennial chrysanthemum stems. The method in this application uses chrysanthemum stems as one of the raw materials for preparing packaging boxes, which can not only reduce air pollution from burning chrysanthemum stems but also increase the variety of chrysanthemum agricultural by-products.
[0066] Figure 2 This is another flowchart illustrating a method for manufacturing packaging boxes according to an embodiment of this application. Figure 2 As shown, the specific steps for preparing the above slurry may include:
[0067] Step S201: Mix chrysanthemum stem pulp, long fiber pulp and short fiber reinforced pulp at the same time to obtain pulp liquid.
[0068] In step S201, after mixing chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp, the long fibers in the long fiber pulp and the short fibers in the short fiber reinforced pulp form an interwoven frame. The chrysanthemum stem pulp is filled more evenly in the frame, thereby improving the density of the frame and enhancing the strength of the packaging box.
[0069] Furthermore, the mixing ratio of chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp during the preparation of the slurry affects the success rate of subsequent slurry molding. In this application, the dry weight ratio of chrysanthemum stem pulp to the slurry ranges from 4% to 6%. For example, in one embodiment, the chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp can be mixed in a dry weight ratio of 5:55:40. This allows the slurry to be directly diluted and molded to obtain a packaging box. Of course, other dry weight ratios can also be used to mix the chrysanthemum stem pulp, long fiber pulp, and short fiber reinforced pulp, such as 6:54:40, 4:56:40, or 5:56:39, etc., without specific limitations.
[0070] Step S202: Dilute the original slurry with water.
[0071] In step S202, the raw slurry is diluted to a set beating degree to form a slurry for subsequent molding processing. Specifically, the beating degree of the slurry can be between 25°SR and 35°SR, such as 25°SR, 25.3°SR, 25.9°SR, 26°SR, 26.8°SR, 27.5°SR, 29.4°SR, 31°SR, 31.5°SR, 31.69°SR, 32°SR, 32.8°SR, 32.91°SR, 33°SR, 34.3°SR, 34.68°SR, 35°SR, etc. The specific beating degree can be set according to the strength requirements of the packaging box, and no specific limitation is made here. Within this beating degree range, the higher the beating degree, the greater the stiffness of the packaging box after molding, the less prone it is to cracking, thereby improving the strength of the packaging box.
[0072] Figure 3 This is another schematic flowchart illustrating the method for preparing packaging boxes in an embodiment of this application. For example... Figure 3 As shown, in some technical solutions, the preparation of chrysanthemum stem pulp in step S201 may specifically include:
[0073] Step S301: Prepare chrysanthemum stem pulp fiber.
[0074] Step S302: Mix the chrysanthemum stem pulp fiber with water to obtain chrysanthemum stem pulp.
[0075] In this application, chrysanthemum stem pulp fiber can be extracted directly from natural chrysanthemum stems using bio-enzymes and then mixed with water, without the need for adding chemical additives with a pungent odor (such as bleach). This results in packaging boxes with the aroma of chrysanthemum stems, thus improving the overall odor of the packaging. Specifically, in step S301, natural chrysanthemum stems can be soaked using a pretreatment enzyme. Subsequently, a pulping enzyme is added for a pulping process. This pulping enzyme can be a wood chip pretreatment enzyme, primarily including cellulase. Then, the pulped fiber is placed in a mold to produce oven-dry chrysanthemum stem pulp (i.e., chrysanthemum stem pulp with zero water content), thereby obtaining chrysanthemum stem pulp fiber.
[0076] In this application, the long-fiber pulp can be bamboo pulp and / or long-fiber wood pulp. Specifically, in some technical solutions, the long-fiber pulp is bamboo pulp; or, in other technical solutions, the long-fiber pulp is long-fiber wood pulp; or, in still other technical solutions, the long-fiber pulp is a mixture of bamboo pulp and long-fiber wood pulp. No specific limitations are imposed here. It should be noted that, in this application, long-fiber wood pulp refers to pulp with a fiber length ranging from 2.0 mm to 3.5 mm, for example, the fiber length can be 2.0 mm, 2.16 mm, 2.9 mm, 3.06 mm, 3.42 mm, 3.5 mm, etc., and no specific limitations are imposed here.
[0077] In addition, the short fiber reinforced pulp can be bagasse and / or short fiber wood pulp. Specifically, in some technical solutions, the short fiber reinforced pulp is bagasse; or, in other technical solutions, the short fiber reinforced pulp is short fiber wood pulp; or, in still other technical solutions, the short fiber reinforced pulp is a mixed pulp of bagasse and short fiber wood pulp. No specific limitations are made here. It should be noted that, in this application, short fiber wood pulp refers to pulp with a fiber length in the range of 0.8 mm to 1.1 mm, for example, the fiber length can be 0.8 mm, 0.95 mm, 1.0 mm, 1.04 mm, 1.096 mm, 1.1 mm, etc., and no specific limitations are made here.
[0078] Figure 4 This is another schematic flowchart illustrating the method for preparing packaging boxes in an embodiment of this application. For example... Figure 4 As shown, in the above technical solution, the processing of slurry using a molding process may specifically include:
[0079] Step S401: Fill the mold with slurry.
[0080] In step S401, the mold can be a mold that produces a single packaging box at a time, which allows for more precise production of each packaging box, thereby improving the quality of the packaging box. Of course, the mold can also be a mold that produces multiple packaging boxes at a time, for example, a mold that can produce 10, 25, 30, 41, 64 or 84 boxes at the same time, etc. There is no specific limitation here, which can increase the production speed of packaging boxes and facilitate the mass production of packaging boxes.
[0081] Step S402: Dehydrate the slurry in the mold using a cold pressing process and / or a hot pressing process to obtain a semi-finished packaging box.
[0082] In step S402, dehydration can be performed using cold pressing and / or hot pressing. For example, in some embodiments, hot pressing can be used to dehydrate the pulp. The hot pressing temperature can be controlled between 100°C and 250°C, and dehydration is completed after 30 to 60 seconds of hot pressing. Compared to the fibers in bamboo pulp or bagasse, the fibers in chrysanthemum stems are coarser, resulting in a lower water absorption rate and easier dehydration during molding, thus reducing the production cost of the packaging box in the dehydration stage. After dehydration, the moisture content of the pulp can be maintained between 5% and 7%, which is beneficial for the molding of the semi-finished packaging box and results in better structural strength. Of course, in other embodiments, cold pressing can be used to dehydrate the pulp at room temperature. Alternatively, in other embodiments, cold pressing can be used first for dehydration, followed by hot pressing, which reduces the time required for hot pressing, saving nearly 70% of the heat energy and lowering production costs.
[0083] Step S403: Remove the mold and die-cut the semi-finished packaging box to obtain the packaging box.
[0084] In step S403, the packaging box is obtained directly after removing the mold and die-cutting. In other words, dehydration and molding can be completed simultaneously during the molding process without additional processing, thus simplifying the production process of the packaging box.
[0085] The method described in this application is illustrated below using a complete production process as an example.
[0086] Example 1
[0087] First, prepare natural chrysanthemum stems. Extract fibers from the chrysanthemum stems and process them into chrysanthemum stem dry pulp fibers. Then, mix the chrysanthemum stem dry pulp fibers with water to obtain chrysanthemum stem raw pulp. Subsequently, prepare chrysanthemum stem raw pulp, long fiber raw pulp, and short fiber reinforced raw pulp in a dry weight ratio of 5:55:40, and thoroughly mix these three raw pulps to obtain a pulp solution. Dilute the pulp solution with water until a pulp with a freeness of 25°SR is obtained, ready for use.
[0088] In the molding process of the slurry, the slurry is first filled into a first mold, which is a mold capable of forming one packaging box at a time. Then, a cold pressing process is used to dehydrate the slurry within the first mold. Specifically, at room temperature, a cold pressing device is used to directly extrude the slurry for 2 to 4 hours until the moisture content of the slurry reaches 5% to 7%, thus obtaining a semi-finished packaging box. Finally, the first mold is removed, and excess scrap from the semi-finished packaging box is trimmed to form the finished packaging box.
[0089] Example 2
[0090] Compared to Example 1, Example 2 uses a second mold. The second mold is capable of forming 50 packaging boxes at a time. Thus, after removing the second mold, a semi-finished product containing 50 packaging boxes can be obtained simultaneously. Then, the semi-finished product is die-cut to obtain 50 finished packaging boxes.
[0091] Example 3
[0092] First, prepare natural chrysanthemum stems. Extract fibers from the chrysanthemum stems and process them into chrysanthemum stem dry pulp fibers. Then, mix the chrysanthemum stem dry pulp fibers with water to obtain chrysanthemum stem raw pulp. Subsequently, prepare chrysanthemum stem raw pulp, long fiber raw pulp, and short fiber reinforced raw pulp in a dry weight ratio of 6:54:40, and thoroughly mix these three raw pulps to obtain a pulp solution. Dilute the pulp solution with water until a pulp with a freeness of 29°SR is obtained, ready for use.
[0093] In the molding process of the slurry, the slurry is first filled into a third mold, which can form 30 packaging boxes at a time. Then, a hot-pressing process is used to dehydrate the slurry within the third mold. Specifically, a hot-pressing device directly extrudes the slurry and heats it at 150 degrees Celsius for 50 seconds until the slurry's moisture content reaches 6%, thus obtaining a semi-finished packaging box. Finally, the third mold is removed, and the semi-finished packaging boxes are die-cut to obtain 30 finished packaging boxes.
[0094] Example 4
[0095] Compared to Example 3, Example 4 uses both cold pressing and hot pressing processes to dehydrate the slurry in the fourth mold. The third mold is a mold capable of forming multiple packaging boxes at once. Specifically, before the hot pressing process, cold pressing technology is used as the cold pressing process to dehydrate the slurry in the fourth mold. For example, when only hot die forging is used as the hot pressing process for dehydration, the target dehydration amount for hot die forging is 75 cm³. 3 However, when cold pressing is followed by hot die forging, the dehydration rate of hot die forging can be increased to 23 cm. 3 Thus, compared to hot die forging for dehydration, using cold pressing technology and hot die forging can reduce the heat energy consumption of hot die forging from 250.4 kJ to 76.8 kJ, thereby saving 69.3% of heat energy consumption.
[0096] Based on the same design concept, this application also provides a packaging box. This packaging box is prepared using the method of any of the above embodiments. The packaging box is made from a mixture of natural chrysanthemum stem pulp, long-fiber pulp, and short-fiber reinforcing pulp, without the need for added chemical additives with pungent odors, thereby improving the odor of the packaging box and enhancing user comfort.
[0097] Figure 5 This is another flowchart illustrating a method for manufacturing packaging boxes according to an embodiment of this application. Figure 5 As shown, the method may specifically include:
[0098] Step S501: Process the pulp using a molding process to obtain a packaging box, wherein the pulp includes lotus seed slurry, long fiber slurry and short fiber reinforced slurry.
[0099] In the method of this application embodiment, the pulp of the packaging box is made by mixing natural lotus seed slurry with long fiber slurry and short fiber reinforcing slurry, without the need to add chemical additives with pungent odors, thereby improving the odor of the finished packaging box and enhancing the user's comfort.
[0100] Furthermore, the lotus seedpod fiber pulp of this application can be made from lotus seedpods. Typically, lotus seedpods are inverted conical shapes. The receptacle of the lotus seedpod has multiple dispersed honeycomb pores, which contain lotus seeds. After the lotus seeds are harvested, most lotus seedpods are burned. This disposal not only poses safety hazards but also generates air pollutants. Therefore, the utilization rate of lotus seedpods is low. The method of this application uses lotus seedpods as one of the raw materials for preparing packaging boxes, which can not only reduce air pollution from burning lotus seedpods but also increase the variety of lotus seedpod agricultural by-products.
[0101] Figure 6 This is another flowchart illustrating a method for manufacturing packaging boxes according to an embodiment of this application. Figure 6 As shown, the specific steps for preparing the above slurry may include:
[0102] Step S601: Mix lotus seed slurry, long fiber slurry and short fiber reinforced slurry simultaneously to obtain slurry liquid.
[0103] In step S601, after mixing lotus seed spore pulp, long fiber pulp and short fiber reinforced pulp, the long fibers in the long fiber pulp and the short fibers in the short fiber reinforced pulp form an interwoven frame. The lotus seed spore pulp fills the frame relatively evenly, thereby improving the density of the frame and enhancing the strength of the packaging box.
[0104] Furthermore, the mixing ratio of lotus seed pod fiber slurry, long fiber slurry, and short fiber reinforcing slurry during the preparation of the slurry will affect the success rate of subsequent slurry molding. In this application, the dry weight ratio of lotus seed pod fiber slurry to the slurry ranges from 4% to 6%. For example, in one embodiment, the lotus seed pod fiber slurry, long fiber slurry, and short fiber reinforcing slurry can be mixed in a dry weight ratio of 5:55:40. This allows the slurry to be directly diluted and molded to obtain a packaging box. Of course, the lotus seed pod fiber slurry, long fiber slurry, and short fiber reinforcing slurry can also be mixed in other dry weight ratios, such as 6:54:40, 4:56:40, or 5:56:39, etc., without specific limitations.
[0105] Step S602: Dilute the original slurry with water.
[0106] In step S602, the raw slurry is diluted to a set beating degree to form a slurry for subsequent molding processing. Specifically, the beating degree of the slurry can be between 25°SR and 35°SR, such as 25°SR, 25.3°SR, 25.9°SR, 26°SR, 26.8°SR, 27.5°SR, 29.4°SR, 31°SR, 31.5°SR, 31.69°SR, 32°SR, 32.8°SR, 32.91°SR, 33°SR, 34.3°SR, 34.68°SR, 35°SR, etc. The specific beating degree can be set according to the strength requirements of the packaging box, and no specific limitation is made here. Within this beating degree range, the higher the beating degree, the greater the stiffness of the packaging box after molding, the less prone it is to cracking, thereby improving the strength of the packaging box.
[0107] Figure 7 This is another schematic flowchart illustrating the method for preparing packaging boxes in an embodiment of this application. For example... Figure 7 As shown, in some technical solutions, the preparation of the lotus seedpod fiber pulp in step S601 above may specifically include:
[0108] Step S701: Prepare lotus seed pod dry pulp fiber.
[0109] Step S702: Mix the dried lotus seed pulp fiber with water to obtain lotus seed pulp fiber raw pulp.
[0110] In this application, lotus seed pulp fibers can be extracted directly from natural lotus pods using bio-enzymes and then mixed with water, without the need for adding chemical additives with pungent odors (such as bleach). This results in packaging boxes with a lotus seed pod scent, thus improving the overall odor of the packaging. Specifically, in step S701, natural lotus pods can be soaked using pretreatment enzymes. Then, pulping enzymes are added for a pulping process. These pulping enzymes can be wood chip pretreatment enzymes, primarily including cellulase. The pulped fiber is then placed in a mold to produce absolutely dry lotus seed pulp (i.e., lotus seed pulp with zero water content), thereby obtaining lotus seed pulp fibers.
[0111] In this application, the long-fiber pulp can be bamboo pulp and / or long-fiber wood pulp. Specifically, in some technical solutions, the long-fiber pulp is bamboo pulp; or, in other technical solutions, the long-fiber pulp is long-fiber wood pulp; or, in still other technical solutions, the long-fiber pulp is a mixture of bamboo pulp and long-fiber wood pulp. No specific limitations are imposed here. It should be noted that, in this application, long-fiber wood pulp refers to pulp with a fiber length ranging from 2.0 mm to 3.5 mm, for example, the fiber length can be 2.0 mm, 2.16 mm, 2.9 mm, 3.06 mm, 3.42 mm, 3.5 mm, etc., and no specific limitations are imposed here.
[0112] In addition, the short fiber reinforced pulp can be bagasse and / or short fiber wood pulp. Specifically, in some technical solutions, the short fiber reinforced pulp is bagasse; or, in other technical solutions, the short fiber reinforced pulp is short fiber wood pulp; or, in still other technical solutions, the short fiber reinforced pulp is a mixed pulp of bagasse and short fiber wood pulp. No specific limitations are made here. It should be noted that, in this application, short fiber wood pulp refers to pulp with a fiber length in the range of 0.8 mm to 1.1 mm, for example, the fiber length can be 0.8 mm, 0.95 mm, 1.0 mm, 1.04 mm, 1.096 mm, 1.1 mm, etc., and no specific limitations are made here.
[0113] Figure 8 This is another schematic flowchart illustrating the method for preparing packaging boxes in an embodiment of this application. For example... Figure 8 As shown, in the above technical solution, the processing of slurry using a molding process may specifically include:
[0114] Step S801: Fill the mold with slurry.
[0115] In step S801, the mold can be a mold that produces a single packaging box at a time, which allows for more precise production of each packaging box, thereby improving the quality of the packaging box. Of course, the mold can also be a mold that produces multiple packaging boxes at a time, for example, a mold that can produce 10, 25, 30, 41, 64 or 84 boxes at the same time, etc. There is no specific limitation here, which can increase the production speed of packaging boxes and facilitate the mass production of packaging boxes.
[0116] Step S802: Dehydrate the slurry in the mold using a cold pressing process and / or a hot pressing process to obtain a semi-finished packaging box.
[0117] In step S802, dehydration can be performed using cold pressing and / or hot pressing. For example, in some embodiments, hot pressing can be used to dehydrate the pulp. The hot pressing temperature can be controlled between 100°C and 250°C, and dehydration can be completed after 30 to 60 seconds of hot pressing. Compared to the fibers in bamboo pulp or bagasse, lotus seed pods have coarser fibers, resulting in lower water absorption and easier dehydration during molding, thus reducing the production cost of the packaging box in the dehydration stage. After dehydration, the moisture content of the pulp can be maintained between 5% and 7%, which is beneficial for the molding of the semi-finished packaging box and results in better structural strength. Of course, in other embodiments, cold pressing can be used to dehydrate the pulp at room temperature. Alternatively, in other embodiments, cold pressing can be used first for dehydration, followed by hot pressing, which reduces the time required for hot pressing, saving nearly 70% of the heat energy and lowering production costs.
[0118] Step S803: Remove the mold and die-cut the semi-finished packaging box to obtain the packaging box.
[0119] In step S803, the packaging box is obtained directly after removing the mold and die-cutting. In other words, dehydration and molding can be completed simultaneously during the molding process without additional processing, thus simplifying the packaging box manufacturing process.
[0120] The method described in this application is illustrated below using a complete production process as an example.
[0121] Example 5
[0122] First, prepare natural lotus pods. Extract fibers from the lotus pods and process them into lotus pod dry pulp fibers. Then, mix the lotus pod dry pulp fibers with water to obtain lotus pod fiber slurry. Subsequently, prepare lotus pod fiber slurry, long fiber slurry, and short fiber reinforcing slurry in a dry weight ratio of 5:55:40, and thoroughly mix these three slurries to obtain a pulp solution. Dilute the pulp solution with water until a pulp with a freeness of 25°SR is obtained, ready for use.
[0123] In the molding process of the slurry, the slurry is first filled into a first mold, which is a mold capable of forming one packaging box at a time. Then, a cold pressing process is used to dehydrate the slurry within the first mold. Specifically, at room temperature, a cold pressing device is used to directly extrude the slurry for 2 to 4 hours until the moisture content of the slurry reaches 5% to 7%, thus obtaining a semi-finished packaging box. Finally, the first mold is removed, and excess scrap from the semi-finished packaging box is trimmed to form the finished packaging box.
[0124] Example 6
[0125] Compared to Example 5, Example 6 uses a second mold. The second mold is capable of forming 50 packaging boxes at a time. Thus, after removing the second mold, a semi-finished product containing 50 packaging boxes can be obtained simultaneously. Then, the semi-finished product is die-cut to obtain 50 finished packaging boxes.
[0126] Example 7
[0127] First, prepare natural lotus pods. Extract fibers from the lotus pods and process them into lotus pod dry pulp fibers. Then, mix the lotus pod dry pulp fibers with water to obtain lotus pod fiber slurry. Subsequently, prepare lotus pod fiber slurry, long fiber slurry, and short fiber reinforcing slurry in a dry weight ratio of 6:54:40, and thoroughly mix these three slurries to obtain a pulp solution. Dilute the pulp solution with water until a pulp with a freeness of 29°SR is obtained, ready for use.
[0128] In the molding process of the slurry, the slurry is first filled into a third mold, which can form 30 packaging boxes at a time. Then, a hot-pressing process is used to dehydrate the slurry within the third mold. Specifically, a hot-pressing device directly extrudes the slurry and heats it at 150 degrees Celsius for 50 seconds until the slurry's moisture content reaches 6%, thus obtaining a semi-finished packaging box. Finally, the third mold is removed, and the semi-finished packaging boxes are die-cut to obtain 30 finished packaging boxes.
[0129] Example 8
[0130] Compared to Example 7, Example 8 uses both cold pressing and hot pressing processes to dehydrate the slurry in the fourth mold. The third mold is a mold capable of forming multiple packaging boxes at once. Specifically, before the hot pressing process, cold pressing technology is used as the cold pressing process to dehydrate the slurry in the fourth mold. For example, when only hot die forging is used as the hot pressing process for dehydration, the target dehydration amount for hot die forging is 75 cm³. 3 However, when cold pressing is followed by hot die forging, the dehydration rate of hot die forging can be increased to 23 cm. 3 Thus, compared to hot die forging for dehydration, using cold pressing technology and hot die forging can reduce the heat energy consumption of hot die forging from 250.4 kJ to 76.8 kJ, thereby saving 69.3% of heat energy consumption.
[0131] Based on the same design concept, this application also provides a packaging box. This packaging box is prepared using the method of any of the above embodiments. The packaging box is made from a mixture of natural lotus seed pulp, long fiber pulp, and short fiber reinforcing pulp, without the need for added chemical additives with pungent odors, thereby improving the odor of the packaging box and enhancing user comfort.
[0132] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0133] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. A method for manufacturing packaging boxes, characterized in that, include: The packaging box is obtained by processing the pulp using a molding process, wherein the pulp comprises chrysanthemum stem pulp, long fiber pulp, and short fiber reinforcing pulp, without the need for the addition of chemical additives with pungent odors. In this process, after mixing the chrysanthemum stem pulp, the long fiber pulp, and the short fiber reinforced pulp, the long fibers in the long fiber pulp and the short fibers in the short fiber reinforced pulp form an interwoven frame. The chrysanthemum stem pulp is evenly filled in the frame, thereby increasing the density of the frame and enhancing the strength of the packaging box.
2. The method as described in claim 1, characterized in that, The preparation of the slurry includes: The chrysanthemum stem pulp, the long fiber pulp, and the short fiber reinforced pulp are mixed simultaneously to obtain a pulp solution; The original slurry was diluted with water.
3. The method as described in claim 2, characterized in that, The ratio of the dry weight of the chrysanthemum stem pulp to the dry weight of the pulp liquid is 4% to 6%.
4. The method as described in claim 3, characterized in that, The chrysanthemum stem pulp, the long fiber pulp, and the short fiber reinforced pulp are mixed in a dry weight ratio of 5:55:
40.
5. The method according to any one of claims 2 to 4, characterized in that, The beating degree of the slurry is 25 °SR - 35 °SR.
6. The method as described in claim 1, characterized in that, The preparation of the chrysanthemum stem pulp includes: Prepare chrysanthemum stem pulp fiber; The chrysanthemum stem pulp fiber is mixed with water to obtain the chrysanthemum stem raw pulp.
7. The method as described in claim 1, characterized in that, The long fiber pulp is bamboo pulp and / or long fiber wood pulp.
8. The method as described in claim 1, characterized in that, The short fiber reinforced pulp is bagasse and / or short fiber wood pulp.
9. The method as described in claim 1, characterized in that, Processing the slurry using a molding process includes: The slurry is filled into the mold; The slurry in the mold is dehydrated using a cold pressing process and / or a hot pressing process to obtain a semi-finished packaging box. Remove the mold and die-cut the semi-finished packaging box to obtain the packaging box.
10. The method as described in claim 9, characterized in that, When the slurry in the mold is dehydrated using the cold pressing process and the hot pressing process, the hot pressing process is performed after the cold pressing process.
11. The method as described in claim 9 or 10, characterized in that, The moisture content of the semi-finished packaging box is 5% to 7%.
12. A packaging box, characterized in that, The packaging box is manufactured using the method described in any one of claims 1 to 11.
13. A method for manufacturing packaging boxes, characterized in that, include: The packaging box is obtained by processing the pulp using a molding process, wherein the pulp comprises lotus seed pod fiber pulp, long fiber pulp, and short fiber reinforcing pulp, without the need for adding chemical additives with pungent odors. In this process, after mixing the lotus seed pod fiber pulp, the long fiber pulp, and the short fiber reinforcing pulp, the long fibers in the long fiber pulp and the short fibers in the short fiber reinforcing pulp form an interwoven frame. The lotus seed pod fiber pulp is evenly filled in the frame, thereby increasing the density of the frame and enhancing the strength of the packaging box.
14. The method as described in claim 13, characterized in that, The preparation of the slurry includes: The lotus seed pod fiber pulp, the long fiber pulp, and the short fiber reinforced pulp are mixed simultaneously to obtain a pulp solution; The original slurry was diluted with water.
15. The method as described in claim 14, characterized in that, The ratio of the dry weight of the lotus seed fibrous pulp to the dry weight of the pulp liquid is 4% to 6%.
16. The method as described in claim 15, characterized in that, The lotus seed slurry, the long fiber slurry, and the short fiber reinforced slurry are mixed in a dry weight ratio of 5:55:
40.
17. The method according to any one of claims 14 to 16, characterized in that, The beating degree of the slurry is 25 °SR-35 °SR.
18. The method as described in claim 13, characterized in that, The preparation of the lotus seedpod fiber pulp includes: Prepare dried lotus seed spores and fiber; The dried lotus seed pulp fiber is mixed with water to obtain the original lotus seed pulp fiber.
19. The method as described in claim 13, characterized in that, The long fiber pulp is bamboo pulp and / or long fiber wood pulp.
20. The method as described in claim 13, characterized in that, The short fiber reinforced pulp is bagasse and / or short fiber wood pulp.
21. The method as described in claim 13, characterized in that, Processing the slurry using a molding process includes: The slurry is filled into the mold; The slurry in the mold is dehydrated using a cold pressing process and / or a hot pressing process to obtain a semi-finished packaging box. Remove the mold and die-cut the semi-finished packaging box to obtain the packaging box.
22. The method as described in claim 21, characterized in that, When the slurry in the mold is dehydrated using the cold pressing process and the hot pressing process, the hot pressing process is performed after the cold pressing process.
23. The method as described in claim 21 or 22, characterized in that, The moisture content of the semi-finished packaging box is 5% to 7%.
24. A packaging box, characterized in that, The packaging box is manufactured using the method described in any one of claims 13 to 23.