Manufacturing method suitable for tray in heat preservation box

Abstract

The invention discloses a manufacturing method suitable for a tray in an incubator, which comprises the following steps of: 1, unpacking raw materials, removing impurities, weighing, crushing by using a hydraulic pulper to obtain a crushed material, and then obtaining pulp fibers which have alpha-cellulose content of not less than 76% and do not contain Klason lignin from the raw materials; step 2, mixing the slurry fibers with white water, adding conventional chemicals such as silver-loaded zeolite, a water repellent agent, a wet strength agent and an oil-proof agent, and uniformly stirring to prepare slurry fibers with the concentration of 0.5%; and 3, preparing the slurry fiber with the concentration of 0.5% into a molded tray finished product. The tray specially used in the heat preservation box is designed, the bearing capacity is high, after-treatment is facilitated, the treatment difficulty and cost input are reduced, pollution to the environment is reduced, and the requirements for environment protection and sustainable development at present are met.

Description

Technical Field

[0001] This invention relates to the field of plastic tray technology, and more particularly to a method for manufacturing a tray suitable for use in insulated boxes. Background Technology

[0002] For a long time, trays have been used in various places, including cafeterias, hospitals, hotels, bars, and restaurants. In recent years, with the continuous development of my country's economy and internet technology, the sharing economy has been expanding, and the transaction scale of the shared life services market has also been growing. As a major component of shared life services, food delivery has also developed rapidly.

[0003] As the living standards of urban and rural residents in my country have reached affluent and moderately prosperous levels, consumption has gradually increased its proportion in the national economic activity. Residents' dining consumption has evolved from a basic necessity of three meals a day to an important way to experience food culture and socialize. In recent years, the sales revenue of my country's catering industry has been rising year by year, leading to a continuous increase in demand for food delivery services. Insulated boxes are an essential tool for delivery personnel. However, there is currently no dedicated tray for these boxes; the most common method is to use rigid plastic boards as internal trays. These existing boards have a short lifespan due to their rigidity, and their high rigidity makes them difficult to dispose of, resulting in high disposal costs. Indiscriminate disposal also leads to environmental pollution. Therefore, improvements are urgently needed. Summary of the Invention

[0004] (a) Technical problems that need to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a manufacturing method for pallets suitable for use in insulated boxes. This method facilitates the design of pallets specifically designed for use in insulated boxes, which have strong load-bearing capacity, are easy to process later, reduce processing difficulty and cost, and lower environmental pollution, thus meeting the current needs of green environmental protection and sustainable development.

[0006] (II) Technical solutions required

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A method for manufacturing a suitable tray for an insulated box includes the following steps:

[0009] Step 1: Unpack, remove impurities, and weigh the raw materials. Use a hydraulic pulper to break them down into pulverized material. The raw materials consist of bleached or unbleached bamboo pulp and bagasse pulp. Place the bleached bamboo pulp and bagasse pulp in a mixture of acetone and water to a pulp concentration of 40-50 g / L. Stir at room temperature for 12 hours, then filter. Place the obtained pulp fibers in an acetic anhydride and hydrogen peroxide solution to a pulp concentration of 40-50 g / L. React at 80-90°C for 2 hours, then filter. Treat the obtained pulp fibers with a 5% KOH solution at 20-30°C for 2 hours to obtain pulp fibers with an α-cellulose content of not less than 76% and free of Kl ason lignin.

[0010] Step 2: Mix the pulp fiber with white water, add conventional chemicals such as silver-loaded zeolite, water-resistant agent, wet strength agent and oil-resistant agent, stir evenly to obtain pulp fiber with a concentration of 0.5%;

[0011] Step 3: Inject 0.5% concentration pulp fiber into a homogenizing disperser with a nozzle diameter of 0.17mm and a pressure of 200-250MPa. The pulp fiber passes through the nozzle 40-50 times. Then, it enters a pulp molding machine to produce a molded pallet wet blank. The molded pallet wet blank is dehydrated, hot-pressed and shaped, and trimmed to make the finished molded pallet.

[0012] Preferably, in step 1, bamboo pulp comprises 30%–50%, sugarcane bagasse pulp comprises 50%–70%, and the pulp concentration is 2.0%–3.5%.

[0013] Preferably, the bamboo pulp is 40% and the bagasse pulp is 60%.

[0014] Preferably, in step 1, the mass ratio of bleached bamboo pulp to bagasse pulp is 40-50:60-40.

[0015] Preferably, the ratio of acetone to water in step 1 is 9:1.

[0016] Preferably, in step 1, the volume ratio of acetic anhydride to hydrogen peroxide solution is 1 to 1.2:1.

[0017] Preferably, the proportions of the silver-loaded zeolite, water-resistant agent, oil-resistant agent, and wet-strength agent chemicals used in step 2 to the oven-dry slurry are as follows: silver-loaded zeolite 1%–5%, water-resistant agent 1%–2%, dry-strength agent 0.5%–1.5%, and wet-strength agent 0.5%–1.5%.

[0018] Preferably, in step 3, hot pressing is performed: the pressure is 50-100 kg / cm2, the temperature is 170-230℃, and the time is 15-30 s; the wet blank of the pulp molded fruit tray is dehydrated: the vacuum degree is -0.03 MPa to -0.04 MPa, and the dehydration is performed under suction negative pressure for 15-20 s, with a moisture content of 70%-75%.

[0019] (III) Technical Effects to be Achieved

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention is not only simple, but also facilitates the design of pallets specifically for use in insulated boxes. These pallets have strong load-bearing capacity and are easy to handle later, reducing the difficulty and cost of processing and minimizing environmental pollution. This aligns with the current needs for green environmental protection and sustainable development. Detailed Implementation

[0022] Before describing the compositions, methods, and methodologies of the present invention, it should be understood that the invention is not limited to the specific compositions, methods, and experimental conditions described, as such compositions, methods, and conditions can vary. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention, as the scope of the invention is defined only by the appended claims.

[0023] As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural references unless the context clearly indicates otherwise. Thus, and / or compositions of the type described herein, as will be apparent to those skilled in the art upon reading this disclosure.

[0024] 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 invention pertains. Any methods and materials similar to or equivalent to those described herein may be used in the practice or testing of this invention, as it should be understood that various modifications and variations are contained within the spirit and scope of this invention.

[0025] As used herein, “about,” “approximately,” “substantially,” and “significantly” will be understood by those skilled in the art and will vary to some extent depending on the context in which they are used. Where a term is not readily apparent to those skilled in the art given the context of its use, “about” and “approximately” will indicate a addition or subtraction of less than 10% of the specific term, and “substantially” and “significantly” will indicate a addition or subtraction of more than 10% of the specific term. “Comprising” and “substantially consisting of” will have their conventional meanings in the art.

[0026] Example 1: A method for manufacturing a pallet suitable for an insulated box, characterized by the following steps:

[0027] Step 1: Unpack, remove impurities, and weigh the raw materials. Use a hydraulic pulper to break them down into pulverized pulp. The raw materials consist of bleached or unbleached bamboo pulp and bagasse pulp, with bamboo pulp comprising 30%–50% and bagasse pulp 50%–70%. The pulp concentration is 2.0%–3.5%. Add the bleached bamboo pulp and bagasse pulp (mass ratio 40–50:60–40) to a mixture of acetone and water (ratio 9:1), achieving a pulp concentration of 40–50 g / L. Stir at room temperature for 12 hours, then filter. Place the obtained pulp fibers in a solution of acetic anhydride and hydrogen peroxide (volume ratio 1–1.2:1), achieving a pulp concentration of 40–50 g / L, and react at 80–90°C for 2 hours. Filter again. Treat the obtained pulp fibers with a 5% KOH solution at 20–30°C for 2 hours to obtain α-cellulose content not less than 76% and free of Kl. Klason lignin pulp fibers;

[0028] Step 2: Mix the pulp fiber with white water, add conventional chemicals such as silver-loaded zeolite, water-resistant agent, wet strength agent, and oil-resistant agent, and stir evenly to obtain a 0.5% concentration pulp fiber; the dosage ratio of the silver-loaded zeolite, water-resistant agent, oil-resistant agent, and wet strength agent to the oven-dry pulp is: silver-loaded zeolite 1%~5%, water-resistant agent 1%~2%, dry strength agent 0.5%~1.5%, and wet strength agent 0.5%~1.5%;

[0029] Step 3: Inject 0.5% concentration pulp fiber into a homogenizing disperser with a nozzle diameter of 0.17mm and a pressure of 200-250MPa. The pulp fiber passes through the nozzle 40-50 times. Then, it enters a pulp molding machine to produce a molded tray wet blank. The molded tray wet blank is then dehydrated, hot-pressed, and trimmed to form the finished molded tray. Hot pressing: pressure 50-100kg / cm2, temperature 170-230℃, time 15-30s. The pulp molded fruit tray wet blank is then dehydrated: vacuum degree -0.03MPa to -0.04MPa, dehydration under negative pressure for 15-20s, moisture content 70%-75%.

[0030] Furthermore, the bamboo pulp accounts for 40% and the sugarcane bagasse pulp accounts for 60%. Since bamboo and sugarcane crop waste are used as raw materials for the pulp, the product prepared is a green, environmentally friendly, and fully degradable material. After the product is used and discarded, it can be directly discarded and naturally degraded into planting soil and improve soil quality; or it can be crushed and restored into planting soil for reuse or discarded, so that there is no environmental pollution pressure from the source to the finished product.

[0031]

[0032] It can be seen that under the high temperature conditions of this invention, the loss of mass, whiteness and stiffness is small, and it has low air permeability, good barrier performance and a load-bearing capacity of not less than 4 kg.

[0033] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or any equivalent structural or procedural transformations made using the content of this specification, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A method for manufacturing a tray suitable for use in an insulated box, characterized in that: Includes the following steps: Step 1: Unpack, remove impurities, and weigh the raw materials. Use a hydraulic pulper to break them down into pulverized material. The raw materials consist of bleached or unbleached bamboo pulp and bagasse pulp. Place the bleached bamboo pulp and bagasse pulp into a mixture of acetone and water. The pulp concentration is 40-50 g / L. Stir at room temperature for 12 hours, then filter. Place the obtained pulp fibers into a solution of acetic anhydride and hydrogen peroxide. The pulp concentration is 40-50 g / L. React at 80-90°C for 2 hours, then filter. Treat the obtained pulp fibers with a 5% KOH solution at 20-30°C for 2 hours to obtain pulp fibers with an α-cellulose content of not less than 76% and free of Klason lignin. Step 2: Mix the pulp fiber with white water, add conventional chemicals such as silver-loaded zeolite, water-resistant agent, wet strength agent and oil-resistant agent, stir evenly to obtain pulp fiber with a concentration of 0.5%; Step 3: Inject 0.5% concentration pulp fiber into a homogenizing disperser with a nozzle diameter of 0.17mm and a pressure of 200-250MPa. The pulp fiber passes through the nozzle 40-50 times. Then, it enters a pulp molding machine to produce a molded pallet wet blank. The molded pallet wet blank is dehydrated, hot-pressed and shaped, and trimmed to make the finished molded pallet.

2. The method for manufacturing a suitable tray for an insulated box as described in claim 1, characterized in that: In step 1, bamboo pulp accounts for 30%–50%, and bagasse pulp accounts for 50%–70%; the pulp concentration is 2.0%–3.5%.

3. The method for manufacturing a suitable tray for an insulated box as described in claim 2, characterized in that: The bamboo pulp is 40%, and the sugarcane bagasse pulp is 60%.

4. The method for manufacturing a suitable tray for an insulated box as described in claim 1, characterized in that: In step 1, the mass ratio of bleached bamboo pulp to bagasse pulp is 40-50:60-40.

5. The method for manufacturing a suitable tray for an insulated box as described in claim 1, characterized in that: In step 1, the ratio of acetone to water is 9:

1.

6. The method for manufacturing a suitable tray for an insulated box as described in claim 1, characterized in that: In step 1, the volume ratio of acetic anhydride to hydrogen peroxide solution is 1 to 1.2:

1.

7. The method for manufacturing a suitable tray for an insulated box as described in claim 1, characterized in that: The proportions of the silver-loaded zeolite, water-resistant agent, oil-resistant agent, and wet-strength agent used in step 2 to the oven-dry slurry are as follows: silver-loaded zeolite 1%–5%, water-resistant agent 1%–2%, dry-strength agent 0.5%–1.5%, and wet-strength agent 0.5%–1.5%. The method for manufacturing a suitable tray for an insulated box as described in claim 1 is characterized in that: In step 3, hot pressing is performed: the pressure is 50-100 kg / cm2, the temperature is 170-230℃, and the time is 15-30 s; the wet blank of the pulp molded fruit tray is dehydrated: the vacuum degree is -0.03MPa to -0.04MPa, and the dehydration is performed under suction negative pressure for 15-20 s, with a moisture content of 70%-75%.

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