Environment-friendly heat-resistant disposable meal box and preparation method thereof

Abstract

The invention relates to the technical field of self-heating lunch boxes, in particular to an environment-friendly heat-resistant disposable lunch box and a preparation method thereof. The environment-friendly heat-resistant disposable meal box comprises a dinner plate, the periphery of the top of the dinner plate is fixedly connected with a plate edge, the two ends of the plate edge are each provided with a supporting block used for supporting, the bottoms of the supporting blocks are fixedly connected with an anti-skid rubber pad, and the upper surface and the lower surface of the plate edge are each provided with an anti-skid block. The biological plastic, the plant fiber and the heat-resistant filler are mixed to serve as raw materials of the dinner plate and the supporting block, so that the dinner plate has good biodegradability, meanwhile, the heat-resistant filler is added into the biological plastic and the plant fiber, the overall strength and heat resistance of the meal box are improved, and the environment-friendly performance of the meal box is improved.

Description

Technical Field

[0001] The invention relates to the technical field of self-heating lunch boxes, and in particular to an environmentally friendly heat-resistant disposable lunch box and a preparation method thereof. Background Art

[0002] With the rapid development of the takeout industry and people's pursuit of convenient life, disposable lunch boxes have become an indispensable packaging product in the catering industry, takeout industry and daily life, especially in the fields of fast food, takeout, collective catering, etc., and with the improvement of global environmental awareness and the increasingly serious problem of plastic pollution, more and more countries and regions have begun to restrict the use of traditional plastic lunch boxes, especially disposable plastic lunch boxes. Although plastic lunch boxes are convenient to use and inexpensive, their non-degradable characteristics have caused serious impacts on the environment, especially the pollution of marine ecosystems and land environments. In addition, the heat resistance of plastic lunch boxes is not ideal, and harmful substances are easily produced when exposed to high temperatures.

[0003] Therefore, in view of the above problems, an environmentally friendly heat-resistant disposable lunch box and a preparation method thereof are now developed. Summary of the invention

[0004] In order to overcome the serious impact of existing disposable lunch boxes on the environment, especially the pollution to the marine ecosystem and the land environment, and the disadvantage that the heat resistance of plastic lunch boxes is not ideal and harmful substances are easily produced when encountering high temperatures, the present invention provides an environmentally friendly heat-resistant disposable lunch box and a preparation method thereof.

[0005] The technical implementation scheme of the present invention is: an environmentally friendly and heat-resistant disposable lunch box, comprising a dinner plate, a dish rim is fixedly connected to the outer periphery of the top of the dinner plate, both ends of the dish rim are provided with supporting blocks for holding, the bottom of the supporting block is fixedly connected with a rubber pad for anti-slip, and the upper and lower surfaces of the dish rim are provided with anti-slip blocks.

[0006] Optionally, the support block consists of an upper fixed block, a connecting block and a lower fixed block, the top and bottom of the connecting block are fixedly connected to the upper fixed block and the lower fixed block respectively, and the thickness of the connecting block is the same as the thickness of the plate edge.

[0007] Optionally, an air guide groove is provided on the inner side of the dinner plate, and the air guide groove is used for the circulation of hot air.

[0008] Optionally, the dining plate and the supporting block are made entirely of degradable materials.

[0009] A method for preparing an environmentally friendly heat-resistant disposable lunch box comprises the following steps:

[0010] S1. Select raw materials;

[0011] S2, pre-treating the raw materials;

[0012] S3, hot pressing the dinner plate, and injection molding the support block;

[0013] S4, cooling and solidifying the dining tray and the support block, and installing the anti-sliding block and the rubber block by thermoplastic method;

[0014] S5, assembling the dinner plate and the support block;

[0015] S6. Apply a food-grade waterproof and oil-proof coating to the surface of the assembled dinner plate;

[0016] S7. Product testing and packaging.

[0017] Optionally, the raw materials of the dinner plate and the tray are selected from bioplastics, plant fibers and heat-resistant fillers, with a specific ratio of 50%-70% bioplastics, 20%-40% plant fibers, and 10%-15% heat-resistant fillers. The bioplastic is polylactic acid or polyhydroxyalkanoate, the plant fiber is a mixture of one or more of corn starch, bamboo fiber and wood pulp, and the heat-resistant filler is a mixture of one or more of ceramic powder, glass fiber and mineral powder.

[0018] Optionally, the raw material pretreatment in S2 includes the following steps:

[0019] S201, mixing polylactic acid or polyhydroxyalkanoate with plant fiber and an appropriate amount of heat-resistant filler in a certain proportion, and using a high-speed mixing device to ensure uniform mixing;

[0020] S202. Alginate is added during the mixing process to improve the flexibility and heat resistance of the material.

[0021] Optionally, the specific steps of S3 are:

[0022] S301, heating the mixed material to 180°C-220°C, and pressing it into the shape of a dinner plate through a hot pressing mold; the pressure of the hot pressing molding is controlled at 10-30MPa;

[0023] S302, injecting the mixed material into a mold, performing injection molding, and obtaining a finished support block after cooling;

[0024] S303, performing surface treatment on the dinner plate and the support block to make their surfaces smooth and free of burrs.

[0025] Optionally, the specific installation steps of S5 are: the upper fixed block and the lower fixed block in the support block are tightly fitted with the top and bottom of the plate edge respectively and the anti-sliding block is fitted with the upper fixed block and the lower fixed block to prevent the support block from falling off, and then heat insulation and anti-slip are performed by rubber pads.

[0026] Optionally, the product test of S7 includes evaluation of its heat resistance, oil resistance, strength, etc., and can be carried out through high temperature test, pressure test and food contact safety test, etc.

[0027] The present invention has the following advantages:

[0028] 1. The present invention is provided with a support block, and the upper fixed block and the lower fixed block in the support block are closely attached to the top and bottom of the plate edge respectively, and the anti-sliding block is attached to the upper fixed block and the lower fixed block to prevent the support block from falling off. At this time, the staff can support the dinner plate through the support block. This design not only makes the staff hold the dinner plate more firmly and safely, but also provides heat insulation and anti-slip through the rubber pad.

[0029] 2. The present invention adopts bioplastics, plant fibers and heat-resistant fillers as raw materials for dinner plates and trays, so that the dinner plates have good biodegradability. At the same time, since heat-resistant fillers are added to bioplastics and plant fibers, the overall strength and heat resistance of the lunch box are increased, and the environmental performance of the lunch box is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the dinner plate of the present invention;

[0032] Figure 3 It is a schematic diagram of the support block structure of the present invention.

[0033] The meanings of the reference numerals in the figure are: 1. dinner plate; 2. plate edge; 3. support block; 4. upper fixing block; 5. connecting block; 6. lower fixing block; 7. rubber pad; 8. anti-sliding block; 9. air guide groove. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0035] Example 1

[0036] like Figure 1-Figure 3As shown, an environmentally friendly and heat-resistant disposable lunch box includes a dinner plate 1, a dish edge 2 is fixedly connected to the outer periphery of the top of the dinner plate 1, and support blocks 3 for supporting are arranged at both ends of the dish edge 2, and a rubber pad 7 for anti-slip is fixedly connected to the bottom of the support block 3, and an anti-slip block 8 is arranged on the upper and lower surfaces of the dish edge 2. The support block 3 is composed of an upper fixed block 4, a connecting block 5 and a lower fixed block 6. The top and bottom of the connecting block 5 are respectively fixedly connected to the upper fixed block 4 and the lower fixed block 6. The thickness of the connecting block 5 is the same as that of the dish edge 2. An air guide groove 9 is arranged on the inner side of the dinner plate 1. The air guide groove 9 is used for the circulation of hot air. The dinner plate 1 and the support block 3 are made of degradable material as a whole.

[0037] It should be noted that, by providing the support block 3, the upper fixed block 4 and the lower fixed block 6 in the support block 3 are tightly fitted to the top and bottom of the plate edge 2 respectively, and the anti-sliding block 8 is fitted with the upper fixed block 4 and the lower fixed block 6 to prevent the support block 3 from falling off. At this time, the staff can support the dinner plate 1 through the support block 3. This design not only allows the staff to support the dinner plate 1 more firmly and safely, but also provides heat insulation and anti-slip properties through the rubber pad 7.

[0038] Example 2

[0039] A method for preparing an environmentally friendly heat-resistant disposable lunch box comprises the following steps:

[0040] S1. Select raw materials;

[0041] S2, pre-treating the raw materials;

[0042] S201, mixing polylactic acid or polyhydroxyalkanoate with plant fiber and an appropriate amount of heat-resistant filler in a certain proportion, and using a high-speed mixing device to ensure uniform mixing;

[0043] S202, adding alginate during the mixing process to improve the flexibility and heat resistance of the material;

[0044] S3, hot pressing the dinner plate 1, and injection molding the support block 3;

[0045] S301, heating the mixed material to 180° C. and pressing it into the shape of a dinner plate 1 through a hot pressing mold; the pressure of the hot pressing molding is controlled at 15 MPa;

[0046] S302, injecting the mixed material into the mold, performing injection molding, and obtaining the finished support block 3 after cooling;

[0047] S303, performing surface treatment on the dinner plate 1 and the support block 3 to make their surfaces smooth and free of burrs;

[0048] S4, cooling and curing the dinner plate 1 and the support block 3, and installing the anti-sliding block 8 and the rubber block by thermoplastic method;

[0049] S5, assembling the dinner plate 1 and the support block 3;

[0050] S6, coating the surface of the assembled dinner plate 1 with a layer of food-grade waterproof and oil-proof coating;

[0051] S7. Product testing and packaging.

[0052] It should be further explained in this embodiment that the raw materials of the dinner plate 1 and the support block 3 are selected from bioplastics, plant fibers and heat-resistant fillers, and the specific ratio is 50% bioplastics, 40% plant fibers, and 10% heat-resistant fillers. The bioplastic is polylactic acid, the plant fiber is corn starch, and the heat-resistant filler is ceramic powder.

[0053] What needs to be further explained in this embodiment is that the specific installation steps of S5 are: the upper fixed block 4 and the lower fixed block 6 in the support block 3 are tightly fitted to the top and bottom of the plate edge 2 respectively and the anti-sliding block 8 is fitted to the upper fixed block 4 and the lower fixed block 6 to prevent the support block 3 from falling off, and then the rubber pad 7 is used for heat insulation and anti-slip.

[0054] It should be further explained in this embodiment that the product test of S7 includes evaluation of its heat resistance, oil resistance, strength and other aspects, and can be carried out through high temperature test, pressure test and food contact safety test.

[0055] Example 3

[0056] A method for preparing an environmentally friendly heat-resistant disposable lunch box comprises the following steps:

[0057] S1. Select raw materials;

[0058] S2, pre-treating the raw materials;

[0059] S201, mixing polylactic acid or polyhydroxyalkanoate with plant fiber and an appropriate amount of heat-resistant filler in a certain proportion, and using a high-speed mixing device to ensure uniform mixing;

[0060] S202, adding alginate during the mixing process to improve the flexibility and heat resistance of the material;

[0061] S3, hot pressing the dinner plate 1, and injection molding the support block 3;

[0062] S301, heating the mixed material to 200° C. and pressing it into the shape of a dinner plate 1 through a hot pressing mold; the pressure of the hot pressing molding is controlled at 10 MPa;

[0063] S302, injecting the mixed material into the mold, performing injection molding, and obtaining the finished support block 3 after cooling;

[0064] S303, performing surface treatment on the dinner plate 1 and the support block 3 to make their surfaces smooth and free of burrs;

[0065] S4, cooling and curing the dinner plate 1 and the support block 3, and installing the anti-sliding block 8 and the rubber block by thermoplastic method;

[0066] S5, assembling the dinner plate 1 and the support block 3;

[0067] S6, coating the surface of the assembled dinner plate 1 with a layer of food-grade waterproof and oil-proof coating;

[0068] S7. Product testing and packaging.

[0069] It should be further explained in this embodiment that the raw materials of the dinner plate 1 and the support block 3 are selected from bioplastics, plant fibers and heat-resistant fillers, and the specific ratio is 60% bioplastics, 25% plant fibers, and 15% heat-resistant fillers. The bioplastic is polyhydroxyalkanoate, the plant fiber is bamboo fiber, and the heat-resistant filler is glass fiber.

[0070] What needs to be further explained in this embodiment is that the specific installation steps of S5 are: the upper fixed block 4 and the lower fixed block 6 in the support block 3 are tightly fitted to the top and bottom of the plate edge 2 respectively and the anti-sliding block 8 is fitted to the upper fixed block 4 and the lower fixed block 6 to prevent the support block 3 from falling off, and then the rubber pad 7 is used for heat insulation and anti-slip.

[0071] It should be further explained in this embodiment that the product test of S7 includes evaluation of its heat resistance, oil resistance, strength and other aspects, and can be carried out through high temperature test, pressure test and food contact safety test.

[0072] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. An environmentally friendly, heat-resistant disposable lunch box, comprising a dinner plate (1), wherein a dish edge (2) is fixedly connected to the outer periphery of the top of the dinner plate (1), and support blocks (3) for supporting are arranged at both ends of the dish edge (2), and a rubber pad (7) for preventing slipping is fixedly connected to the bottom of the support block (3), and anti-slip blocks (8) are arranged on the upper surface and the lower surface of the dish edge (2).

2. The environmentally friendly heat-resistant disposable lunch box according to claim 1, characterized in that: The support block (3) is composed of an upper fixed block (4), a connecting block (5) and a lower fixed block (6); the top and bottom of the connecting block (5) are respectively fixedly connected to the upper fixed block (4) and the lower fixed block (6); the thickness of the connecting block (5) is the same as the thickness of the plate edge (2).

3. The environmentally friendly heat-resistant disposable lunch box according to claim 1, characterized in that: An air guide groove (9) is provided on the inner side of the dinner plate (1), and the air guide groove (9) is used for the circulation of hot air.

4. The environmentally friendly heat-resistant disposable lunch box according to claim 1 is characterized in that: The dinner plate (1) and the support block (3) are made entirely of degradable materials.

5. A method for preparing an environmentally friendly heat-resistant disposable lunch box, applied to an environmentally friendly heat-resistant disposable lunch box as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Select raw materials; S2, pre-treating the raw materials; S3, hot pressing the dinner plate (1) and injection molding the support block (3); S4, cooling and solidifying the dining tray (1) and the support block (3), and installing the anti-sliding block (8) and the rubber block by means of thermoplasticization; S5, assembling the dinner plate (1) and the support block (3); S6. Coating a food-grade waterproof and oil-proof coating on the surface of the assembled dinner plate (1); S7. Product testing and packaging.

6. The method for preparing an environmentally friendly heat-resistant disposable lunch box according to claim 5, characterized in that: The raw materials of the dinner plate (1) and the support block (3) are selected from bioplastics, plant fibers and heat-resistant fillers, and the specific ratio is 50%-70% of bioplastics, 20%-40% of plant fibers, and 10%-15% of heat-resistant fillers. The bioplastic is polylactic acid or polyhydroxyalkanoate, the plant fiber is a mixture of one or more of corn starch, bamboo fiber and wood pulp, and the heat-resistant filler is a mixture of one or more of ceramic powder, glass fiber and mineral powder.

7. The method for preparing an environmentally friendly heat-resistant disposable lunch box according to claim 5, characterized in that: The raw material pretreatment in S2 comprises the following steps: S201, mixing polylactic acid or polyhydroxyalkanoate with plant fiber and an appropriate amount of heat-resistant filler in a certain proportion, and using a high-speed mixing device to ensure uniform mixing; S202. Alginate is added during the mixing process to improve the flexibility and heat resistance of the material.

8. The method for preparing an environmentally friendly heat-resistant disposable lunch box according to claim 5, characterized in that: The specific steps of S3 are: S301, heating the mixed material to 180° C.-220° C., and pressing it into the shape of a dinner plate (1) through a hot pressing mold; the pressure of the hot pressing molding is controlled at 10-30 MPa; S302, injecting the mixed material into a mold for injection molding, and obtaining a finished support block (3) after cooling; S303, performing surface treatment on the dinner plate (1) and the support block (3) to make their surfaces smooth and free of burrs.

9. The method for preparing an environmentally friendly heat-resistant disposable lunch box according to claim 5, characterized in that: The specific installation steps of S5 are as follows: the upper fixing block (4) and the lower fixing block (6) in the support block (3) are respectively tightly fitted with the top and bottom of the plate edge (2) and the anti-sliding block (8) is fitted with the upper fixing block (4) and the lower fixing block (6) to prevent the support block (3) from falling off, and then the rubber pad (7) is used for heat insulation and anti-slip.

10. The method for preparing an environmentally friendly heat-resistant disposable lunch box according to claim 5, characterized in that: The product testing of the S7 includes evaluation of its heat resistance, oil resistance, strength and other aspects, and can pass high temperature testing, pressure resistance testing and food contact safety testing, etc.

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