A low-temperature resistant and oxidation-resistant plastic tray

Abstract

This utility model belongs to the field of plastic pallet technology, and in particular to a low-temperature resistant and antioxidant plastic pallet, including a pallet body and support feet located at the bottom of the pallet body. The outer wall of the pallet body is wrapped with a flexible anti-collision sleeve. The pallet body adopts a multi-layer composite low-temperature resistant and antioxidant resin structure. The pallet body includes an HDPE outer layer, a PP inner layer, heat insulation filler, and metal reinforcing ribs. A closed cavity is provided between the HDPE outer layer and the PP inner layer, and the heat insulation filler is filled in the closed cavity. Multiple metal reinforcing ribs are evenly spaced in the heat insulation filler along the horizontal direction. The multi-layer composite low-temperature resistant and antioxidant resin structure of the pallet body effectively disperses stress concentration, alleviates thermal expansion and contraction deformation, solves the problem of low-temperature brittleness, and ensures the stable use of the pallet in cold chain logistics and other scenarios. The elastic buffer design of the flexible anti-collision sleeve and support feet further improves the pallet's impact resistance and stability.

Description

Technical Field

[0001] This utility model belongs to the field of plastic pallet technology, specifically relating to a low-temperature resistant and oxidation-resistant plastic pallet. Background Technology

[0002] As a core carrier of unitized logistics, the performance of plastic pallets directly affects transportation efficiency and cargo safety. In scenarios such as cold chain logistics (-40℃ to -50℃) and chemical warehousing, traditional plastic pallets (such as those made of PP or PE) have significant shortcomings:

[0003] 1. Low-temperature brittleness: When the temperature of ordinary polypropylene (PP) pallets is below -20℃, the movement of molecular chains is restricted, the impact strength decreases by about 40%, and they are prone to breakage, which may cause the goods to tip over.

[0004] 2. Oxidative aging: Long-term exposure to ultraviolet light, acid and alkali environments, or high and low temperature alternating conditions can easily degrade the molecular chains of materials, leading to a decrease in tray strength and a shortened lifespan.

[0005] 3. Structural defects: Pallets made of a single material are prone to thermal expansion and contraction at low temperatures, which affects the accurate stacking of automated warehousing systems.

[0006] Existing improvements mainly focus on material formulation (such as adding toughening agent POE or nanofillers), but have not solved the problem of structural stress concentration at low temperatures.

[0007] To address the aforementioned problems, this utility model proposes a low-temperature resistant and oxidation-resistant plastic tray. Utility Model Content

[0008] To address the aforementioned problems in the existing technology, this utility model provides a low-temperature resistant and oxidation-resistant plastic pallet, which features high stability and long service life, thereby solving the problem of decreased impact resistance caused by material embrittlement in plastic pallets under low-temperature environments.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature resistant and antioxidant plastic pallet, comprising a pallet body and support feet disposed at the bottom of the pallet body, wherein the outer side wall of the pallet body is wrapped with a flexible anti-collision sleeve, and the pallet body adopts a multi-layer composite low-temperature resistant and antioxidant resin structure;

[0010] The pallet body comprises an HDPE outer layer, a PP inner layer, heat insulation filler, and metal reinforcing ribs;

[0011] A closed cavity is provided between the HDPE outer layer and the PP inner layer, and the heat insulation filler is filled in the closed cavity. A plurality of metal reinforcing ribs are equally spaced in the heat insulation filler along the horizontal direction.

[0012] As a preferred embodiment of this invention, the heat-insulating filler is an aerogel elastomer.

[0013] As a preferred embodiment of this utility model, the metal reinforcing rib is a wavy or spiral stainless steel strip.

[0014] As a preferred technical solution of this utility model, the top surface of the tray body is provided with honeycomb-shaped ribs integrally injection molded with the HDPE outer layer.

[0015] As a preferred embodiment of this utility model, the top surface of the tray body is provided with a positioning groove for the support foot to be inserted.

[0016] As a preferred embodiment of the present invention, the support foot includes an outer cylinder, a buffer inner column, and a telescopic spring;

[0017] The outer cylinder and the inner PP layer are integrally injection molded, and a buffer cavity is formed in the outer cylinder.

[0018] The inner pillar of the buffer is embedded in the buffer cavity to form a telescopic structure;

[0019] The telescopic springs are distributed between the inner top surface of the buffer cavity and the top surface of the inner buffer column.

[0020] As a preferred technical solution of this utility model, a sealing ring is also included;

[0021] A first limiting ring is fixed to the inner wall of the port of the buffer cavity, and a second limiting ring adapted to the first limiting ring is fixed to the top of the outer wall of the inner buffer column.

[0022] The sealing ring is bonded and fixed to the inner wall of the first limiting ring, and the inner wall of the sealing ring is attached to the outer wall of the buffer inner column. A breathable micropore communicating with the buffer cavity is provided on the outer cylinder.

[0023] As a preferred embodiment of this utility model, an anti-slip pad is bonded and fixed to the bottom end of the inner buffer column.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. The pallet body adopts a multi-layer composite low-temperature resistant and antioxidant resin structure, which effectively disperses stress concentration, alleviates thermal expansion and contraction deformation, solves the problem of low-temperature brittleness, and ensures the stable use of the pallet in cold chain logistics and other scenarios;

[0026] 2. The flexible anti-collision sleeve and the elastic cushioning design of the support feet further enhance the pallet's impact resistance and stability.

[0027] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the pallet body in this utility model;

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the support foot in this utility model;

[0032] Figure 4 This utility model Figure 3 A magnified structural diagram at point A in the diagram.

[0033] In the diagram: 1. Pallet body; 11. HDPE outer layer; 12. PP inner layer; 13. Enclosed cavity; 14. Thermal insulation filler; 15. Metal reinforcing rib; 2. Support foot; 21. Outer cylinder; 211. Buffer cavity; 212. Breathable micropores; 213. First limiting ring; 22. Buffer inner column; 221. Second limiting ring; 23. Telescopic spring; 24. Anti-slip pad; 25. Sealing ring; 3. Honeycomb ribs; 4. Positioning groove; 5. Flexible anti-collision sleeve. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figures 1-4 The present invention provides the following technical solution: a low-temperature resistant and antioxidant plastic pallet, comprising a pallet body 1 and a support foot 2 located at the bottom of the pallet body 1, the outer side wall of the pallet body 1 being wrapped with a flexible anti-collision sleeve 5, and the pallet body 1 being made of a multi-layer composite low-temperature resistant and antioxidant resin structure.

[0036] Furthermore, by Figure 1 and Figure 2As shown in this embodiment, the tray body 1 includes an HDPE outer layer 11 (antioxidants can be added to further enhance its antioxidant effect), a PP inner layer 12, a heat insulation filler 14, and metal reinforcing ribs 15; a closed cavity 13 is provided between the HDPE outer layer 11 and the PP inner layer 12, the heat insulation filler 14 is filled in the closed cavity 13, and multiple metal reinforcing ribs 15 are equally spaced in the heat insulation filler 14 along the horizontal direction. With the above solution, when in use, the HDPE outer layer 11 (high-density polyethylene) itself has excellent chemical stability, which can block the direct contact between external oxygen and water vapor and the internal structure of the tray body 1, and reduce the triggering conditions for oxidation reaction.

[0037] By adding antioxidants (such as hindered phenolic and phosphite antioxidants) to the HDPE outer layer 11, free radicals that are slowly released in the environment due to reduced molecular activity at low temperatures can be further captured, inhibiting the oxidative breakage of HDPE molecular chains, avoiding aging phenomena such as cracking, discoloration, and strength reduction in the HDPE outer layer 11, and extending the service life of the pallet in low-temperature outdoor or cyclic use.

[0038] The HDPE outer layer 11 and the PP inner layer 12 form a double-layer low-temperature resistant structure. Both have the characteristic of not becoming brittle at low temperatures, which can resist the direct "freezing and corrosion" of the pallet body 1 by the low temperature environment, and avoid the problem of excessive rigidity and easy breakage of the pallet body 1 due to low temperature.

[0039] The closed cavity 13 between the HDPE outer layer 11 and the PP inner layer 12 utilizes the principle of "static air insulation" to block the transfer of low external temperatures to the inside of the pallet through "heat conduction". At the same time, the heat insulation filler 14 filled in the closed cavity 13 can further reduce the convective heat transfer efficiency of the air in the closed cavity 13, forming a double heat insulation barrier of "cavity insulation + filler heat resistance". This not only avoids stress deformation of the pallet body 1 due to excessive temperature difference between the inside and outside, but also reduces the additional cold loss of goods (such as fresh and frozen food) carried by the pallet in the low temperature environment, and helps to maintain the stability of the storage temperature of the goods.

[0040] Multiple metal reinforcing ribs 15 are arranged at equal intervals along the horizontal direction, embedded inside the heat insulation filler 14 and forming a rigid connection with the HDPE outer layer 11 and the PP inner layer 12. When the pallet carries goods, the weight of the goods is transferred to the heat insulation filler 14 through the PP inner layer 12, and then dispersed to the metal reinforcing ribs 15 by the heat insulation filler 14.

[0041] Metal reinforcing ribs 15, with their almost unchanged mechanical properties at low temperatures (no risk of embrittlement), transform concentrated loads into evenly distributed supporting forces, which are then transferred to the HDPE outer layer 11 and the bottom support feet 2. This prevents the plastic substrate from experiencing localized dents or cracks due to insufficient low-temperature toughness, ensuring the pallet's load-bearing stability and reusability at low temperatures.

[0042] The flexible anti-collision sleeve 5 (such as modified nitrile rubber or TPR elastomer) wrapped around the outer wall of the pallet body 1 can absorb the impact force of the collision through its own elastic deformation, transforming the "rigid collision" into a "flexible buffer", preventing the HDPE outer layer 11 from cracking due to low-temperature embrittlement, and protecting the integrity of the outer wall of the pallet.

[0043] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the heat insulation filler 14 is an aerogel elastomer. After adopting the above solution, when in use, the aerogel elastomer serves as the heat insulation filler 14. It has a nano-scale porous structure, which can more efficiently block heat conduction in low-temperature environments, further reduce the temperature difference between the inside and outside of the pallet body 1, avoid cracking of the HDPE outer layer 11 and PP inner layer 12 due to temperature difference stress, and maximize the reduction of cold loss of goods. It is especially suitable for the storage and transportation needs of fresh and frozen foods in cold chain logistics.

[0044] Aerogel elastomers possess excellent elastic deformation capabilities. When a pallet carries goods or is subjected to slight compression, it can buffer and disperse the load through its own elasticity, avoiding local stress concentration between the metal reinforcing rib 15 and the HDPE outer layer 11 and PP inner layer 12 due to rigid contact. This effectively protects the connection stability between the plastic substrate and the metal reinforcing rib 15 and solves the problem of interface peeling that easily occurs when plastic and metal are subjected to stress together in low-temperature environments.

[0045] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the metal reinforcing rib 15 is a wavy or spiral stainless steel strip. With the above solution, when in use, the wavy or spiral stainless steel strip, compared with the traditional straight metal reinforcing rib 15, has a curved surface structure that can increase the contact area with the aerogel elastomer, forming a "concave-convex interlocking" connection state. This not only prevents the interface peeling between the plastic substrate and the metal reinforcing rib 15 due to the difference in thermal expansion and contraction coefficients in low-temperature environments, but also improves the overall structural synergy through the friction between the aerogel elastomer and the wavy or spiral curved surface, making the load transfer more uniform. At the same time, the stainless steel material has excellent low-temperature mechanical stability, no risk of embrittlement, and can maintain the structural strength of the reinforcing rib for a long time, ensuring the upper limit of the load-bearing capacity of the pallet during low-temperature stacking.

[0046] The wave-shaped or spiral structure itself has a certain elastic deformation capability. When the pallet body 1 is subjected to impact, heavy cargo pressure or rigid collision at low temperature, the metal reinforcing rib 15 can absorb part of the impact force through the slight deformation of its own curved surface, thus avoiding stress concentration in local areas of the plastic substrate.

[0047] Preferably, by Figure 1As shown in this embodiment, the top surface of the tray body 1 is provided with honeycomb-shaped ribs 3 integrally injection molded with the HDPE outer layer 11. With the above solution, when in use, the honeycomb-shaped ribs 3 and the HDPE outer layer 11 are integrally injection molded, which can avoid the interface separation problem caused by the difference in the thermal expansion and contraction coefficient of materials in traditional split connections (such as pasting and welding) under low temperature environment, and ensure the structural integrity of the honeycomb-shaped ribs 3 and the top surface of the tray body 1.

[0048] The honeycomb structure has the characteristics of "lightweight and high strength". Its hexagonal grid can evenly distribute the pressure of the goods to the entire top surface of the pallet body 1. When the pallet body 1 carries frozen goods (such as stacked frozen boxes), the honeycomb ribs 3 can transform the local concentrated load into a planar support force through the synergistic force of the honeycomb grid, effectively preventing the top surface of the HDPE outer layer 11 from sinking and cracking when the toughness decreases at low temperature.

[0049] Preferably, by Figure 1 As shown in this embodiment, the top surface of the pallet body 1 is provided with a positioning groove 4 for the support foot 2 to be embedded. With the above solution, the fitting structure of the positioning groove 4 and the support foot 2 can achieve precise positioning when the pallet is stacked. In low temperature environment, the pallet body 1 may undergo slight deformation due to thermal expansion and contraction. Traditional stacking is prone to the offset of the support foot 2 and the misalignment between layers. However, the positioning groove 4 can limit the horizontal displacement of the upper and lower pallets by fitting with the support foot 2. Combined with the anti-slip effect of the honeycomb ribs 3, it forms a double protection of "positioning + anti-slip", which avoids the damage of cold chain goods (such as frozen boxes) due to the tilt of the stack, while ensuring the verticality of the stack.

[0050] After the support foot 2 is embedded in the positioning groove 4, a "load transmission closed loop" can be formed: in the stacking state, the weight of the upper pallet is directly transmitted to the positioning groove 4 of the lower pallet through the support foot 2. The positioning groove 4 disperses the concentrated load to the entire top surface of the pallet body 1, and then transmits it to the lower support foot 2 through the metal reinforcing rib 15 and the aerogel elastomer. This avoids cracking and denting of the HDPE outer layer 11 due to local stress concentration at low temperatures, and significantly improves the load-bearing capacity of multi-layer stacking.

[0051] Optionally, by Figure 1 and Figure 3As shown, in this embodiment, the support foot 2 includes an outer cylinder 21, a buffer inner column 22, and a telescopic spring 23; the outer cylinder 21 and the PP inner layer 12 are integrally injection molded, and a buffer cavity 211 is formed inside the outer cylinder 21; the buffer inner column 22 is partially embedded in the buffer cavity 211 to form a telescopic structure; the telescopic spring 23 is distributed between the inner top surface of the buffer cavity 211 and the top surface of the buffer inner column 22. With the above solution, in use, the outer cylinder 21 and the PP inner layer 12 are integrally injection molded. The absence of interface gaps (such as adhesive or screw connections) prevents interface peeling caused by the difference in thermal expansion and contraction coefficients between plastic and other materials in low-temperature environments, ensuring a rigid connection between the outer cylinder 21 and the pallet body 1, and providing a stable foundation for subsequent force transmission. At the same time, the closed structure of the outer cylinder 21 provides a sealed space for the buffer cavity 211, which can prevent moisture from entering in low-temperature and high-humidity environments, and prevent the inner buffer column 22 and the telescopic spring 23 from failing due to moisture corrosion or freezing, making it suitable for the humid and low-temperature working conditions of cold chain logistics.

[0052] When a pallet carries goods or a forklift places a pallet on the ground / lower pallet positioning slot 4, the bottom surface of the inner buffer column 22 first contacts the force-bearing surface (ground, inner wall of positioning slot 4) and is subjected to an upward reaction force or downward pressure from the goods. At this time, the inner buffer column 22 contracts upward along the buffer cavity 211, squeezing the telescopic spring 23 located between the top surface of the buffer cavity 211 and the top surface of the inner buffer column 22. The telescopic spring 23 absorbs the impact energy through elastic deformation, transforming the "rigid impact" into "elastic buffering", preventing the impact force from being directly transmitted to the PP inner layer 12 through the outer cylinder 21, thereby preventing the PP inner layer 12 and HDPE outer layer 11, whose toughness decreases at low temperatures, from cracking and denting due to local impact stress concentration.

[0053] Preferably, by Figure 1 , Figure 3 and Figure 4 As shown, this embodiment also includes a sealing ring 25; a first limiting ring 213 is fixed to the inner wall of the port of the buffer cavity 211, and a second limiting ring 221 adapted to the first limiting ring 213 is fixed to the top of the outer wall of the buffer inner column 22; the sealing ring 25 is bonded and fixed to the inner wall of the first limiting ring 213, and the inner wall of the sealing ring 25 is attached to the outer wall of the buffer inner column 22. A breathable micropore 212 communicating with the buffer cavity 211 is opened on the outer cylinder 21. After adopting the above solution, when in use, the first limiting ring 213 and the second limiting ring 221 form an axial limiting structure, which can accurately limit the extension and retraction stroke of the buffer inner column 22, and avoid the problem of excessive extension and detachment or excessive compression of the buffer inner column 22 due to slight shrinkage of the plastic outer cylinder 21 and changes in the elastic deformation characteristics of the extension spring 23 under low temperature conditions, which would lead to spring failure.

[0054] The sealing ring 25 (preferably made of low-temperature resistant nitrile rubber or fluororubber) forms a flexible sealing interface between the inner wall of the first limiting ring 213 and the outer wall of the buffer inner column 22. On the one hand, it can block water vapor, condensate and cargo debris in the low temperature and high humidity environment from entering the buffer cavity 211, and prevent the telescopic spring 23 in the buffer cavity 211 from rusting due to moisture and the buffer inner column 22 from sticking to the cavity wall due to freezing. On the other hand, the flexible fit of the sealing ring 25 can reduce the rigid friction between the buffer inner column 22 and the inner wall of the first limiting ring 213 when it extends and retracts.

[0055] The breathable micropores 212 enable the buffer cavity 211 to communicate with the outside air pressure, which can solve the problem of "air pressure blockage" in the buffer cavity 211 when the inner buffer column 22 extends and retracts.

[0056] Preferably, by Figure 1 and Figure 3 As shown in this embodiment, the bottom end of the buffer inner column 22 is bonded and fixed with an anti-slip pad 24. After adopting the above solution, when in use, the anti-slip pad 24 (preferably made of low-temperature resistant rubber or TPR elastomer material) can still maintain excellent elasticity and surface friction coefficient in low-temperature environments. It can effectively solve the problem of slippage caused by condensation and trace ice particles on the ground (such as cement floor of cold storage or metal storage plate) in low-temperature scenarios. When the pallet carries frozen goods (such as packaged fresh food or frozen boxes) for placement or handling, the anti-slip pad 24 increases the contact friction through close contact with the ground and elastic deformation, reducing the risk of slippage of the pallet body 1. At the same time, in conjunction with the anti-slip effect of the honeycomb ribs 3 on the top surface of the pallet body 1, a double guarantee of "top surface anti-slip + bottom surface anti-slip" is formed, which comprehensively improves the stability of goods in the cold chain circulation.

[0057] Components not described in detail in this article are existing technologies.

[0058] The working principle and usage process of this utility model: When the plastic pallet of this utility model is in use, the HDPE outer layer 11 (high-density polyethylene) itself has excellent chemical stability, which can block the direct contact between external oxygen and water vapor and the internal structure of the pallet body 1, and reduce the triggering conditions for oxidation reaction.

[0059] By adding antioxidants (such as hindered phenolic and phosphite antioxidants) to the HDPE outer layer 11, free radicals that are slowly released in the environment due to reduced molecular activity at low temperatures can be further captured, inhibiting the oxidative breakage of HDPE molecular chains, avoiding aging phenomena such as cracking, discoloration, and strength reduction in the HDPE outer layer 11, and extending the service life of the pallet in low-temperature outdoor or cyclic use.

[0060] The HDPE outer layer 11 and the PP inner layer 12 form a double-layer low-temperature resistant structure. Both have the characteristic of not becoming brittle at low temperatures, which can resist the direct "freezing and corrosion" of the pallet body 1 by the low temperature environment, and avoid the problem of excessive rigidity and easy breakage of the pallet body 1 due to low temperature.

[0061] The closed cavity 13 between the HDPE outer layer 11 and the PP inner layer 12 utilizes the principle of "static air insulation" to block the transfer of low external temperature to the inside of the tray through "heat conduction".

[0062] Meanwhile, the heat insulation filler 14 filled in the closed cavity 13 can further reduce the convective heat transfer efficiency of the air in the closed cavity 13, forming a double heat insulation barrier of "cavity heat insulation + filler heat resistance". This not only avoids stress deformation of the pallet body 1 due to excessive temperature difference between the inside and outside, but also reduces the additional cold loss of goods (such as fresh and frozen food) carried by the pallet in the low temperature environment, and helps to maintain the stability of the storage temperature of the goods.

[0063] Multiple metal reinforcing ribs 15 are arranged at equal intervals along the horizontal direction, embedded inside the heat insulation filler 14 and forming a rigid connection with the HDPE outer layer 11 and the PP inner layer 12. When the pallet carries goods, the weight of the goods is transferred to the heat insulation filler 14 through the PP inner layer 12, and then dispersed to the metal reinforcing ribs 15 by the heat insulation filler 14.

[0064] Metal reinforcing rib 15, with its almost unchanged mechanical properties at low temperatures (no risk of embrittlement), transforms concentrated loads into evenly distributed supporting forces, which are then transferred to the HDPE outer layer 11 and the bottom support feet 2. This prevents the plastic substrate from experiencing localized dents or cracks due to insufficient low-temperature toughness, ensuring the pallet's load-bearing stability and reusability at low temperatures.

[0065] The flexible anti-collision sleeve 5 (such as modified nitrile rubber or TPR elastomer) wrapped around the outer wall of the pallet body 1 can absorb the impact force of the collision through its own elastic deformation, transforming the "rigid collision" into a "flexible buffer", preventing the HDPE outer layer 11 from cracking due to low-temperature embrittlement, and protecting the integrity of the outer wall of the pallet.

[0066] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-temperature resistant and oxidation-resistant plastic pallet, comprising a pallet body (1) and support feet (2) disposed at the bottom of the pallet body (1), wherein the outer side wall of the pallet body (1) is covered with a flexible anti-collision sleeve (5), characterized in that: The tray body (1) is made of a multi-layer composite low-temperature resistant and antioxidant resin structure; The pallet body (1) includes an HDPE outer layer (11), a PP inner layer (12), heat insulation filler (14), and metal reinforcing ribs (15); A closed cavity (13) is provided between the HDPE outer layer (11) and the PP inner layer (12), and the heat insulation filler (14) is filled in the closed cavity (13). A plurality of metal reinforcing ribs (15) are equally spaced in the heat insulation filler (14) along the horizontal direction.

2. The low-temperature resistant and oxidation-resistant plastic tray according to claim 1, characterized in that: The heat insulation filler (14) is an aerogel elastomer.

3. The low-temperature resistant and oxidation-resistant plastic tray according to claim 1, characterized in that: The metal reinforcing rib (15) is a wavy or spiral stainless steel strip.

4. The low-temperature resistant and oxidation-resistant plastic tray according to claim 1, characterized in that: The top surface of the tray body (1) is provided with honeycomb-shaped ribs (3) integrally injection molded with the HDPE outer layer (11).

5. The low-temperature resistant and oxidation-resistant plastic tray according to claim 1, characterized in that: The top surface of the tray body (1) is provided with a positioning groove (4) for the support foot (2) to be inserted.

6. The low-temperature resistant and oxidation-resistant plastic tray according to claim 1, characterized in that: The support foot (2) includes an outer cylinder (21), a buffer inner column (22), and a telescopic spring (23); The outer cylinder (21) and the PP inner layer (12) are integrally injection molded, and a buffer cavity (211) is opened in the outer cylinder (21); The inner buffer column (22) is partially embedded in the buffer cavity (211) to form a telescopic structure; The telescopic spring (23) is distributed between the inner top surface of the buffer cavity (211) and the top surface of the buffer inner column (22).

7. A low-temperature resistant and oxidation-resistant plastic tray according to claim 6, characterized in that: It also includes a sealing ring (25); The inner wall of the port of the buffer cavity (211) is fixed with a first limiting ring (213), and the top of the outer wall of the buffer inner column (22) is fixed with a second limiting ring (221) that is adapted to the first limiting ring (213). The sealing ring (25) is bonded and fixed to the inner wall of the first limiting ring (213), and the inner wall of the sealing ring (25) is attached to the outer wall of the buffer inner column (22). A breathable micropore (212) communicating with the buffer cavity (211) is provided on the outer cylinder (21).

8. A low-temperature resistant and oxidation-resistant plastic tray according to claim 6, characterized in that: The bottom end of the buffer inner column (22) is glued and fixed with an anti-slip pad (24).

Images