A moisture-proof paper tray base pad

Abstract

This utility model discloses a moisture-proof paper pallet bottom pad, including a paper pallet top plate, with three bottom pad bodies disposed below the top plate. The bottom pad bodies and the top plate are connected by a connecting support assembly. Each bottom pad body consists of a wear-resistant and waterproof layer, a moisture-proof layer, a first compression-resistant layer, a base layer, a second compression-resistant layer, a reinforcing layer, and a toughness layer. This utility model solves the core problem of food spoilage caused by the failure of existing bottom pads to prevent moisture through a synergistic design of bottom wear-resistant waterproofing, a middle core moisture-proof layer, and edge closed-loop moisture-proofing. The wear-resistant and waterproof layer can resist ground friction and directly block the penetration of ground water and condensation, preventing moisture from directly contacting the inner layer. The moisture-proof layer can control the water vapor permeability to an extremely low level, preventing environmental moisture from intruding through fiber gaps. The environmentally friendly polyurethane waterproof coating applied to the entire edge of the bottom pad body forms a closed-loop moisture-proof barrier, preventing moisture from intruding from the sides and improving the moisture-proof and waterproof effect.

Description

Technical Field

[0001] This utility model relates to the field of paper pallet bottom pad technology, specifically a moisture-proof paper pallet bottom pad. Background Technology

[0002] In the logistics and transportation of baked goods such as cakes and mooncakes, paper pallets have become the core tool for carrying such paper packaging products due to their lightweight, biodegradability, low cost, and compliance with environmental protection requirements for food packaging. The bottom pad, as the core load-bearing component of the paper pallet, is in direct contact with the ground or transportation vehicle.

[0003] According to application number CN201821876654.0, a paper pallet is disclosed, including a flat cardboard, an outer edge cardboard, and a reinforced paper base plate. The outer edge cardboard is fixedly connected to the four sides of the flat cardboard by glue, and the reinforced paper base plate is fixedly connected to the bottom of the flat cardboard by glue. A splicing convex paper block is fixedly connected to the front end of the outer edge cardboard by glue. The top of the splicing convex paper block is embedded with small concave and convex paper pieces. A second splicing convex paper block is fixedly connected to the middle right side of the outer edge cardboard by glue.

[0004] The paper pallet base pads in the above cases do not have waterproof and moisture-proof effects. In environments with condensation on the ground, they can soften within 2-3 hours due to water absorption, resulting in a decrease in longitudinal compressive strength. This not only causes a sharp drop in the load-bearing capacity of the paper pallet, but also allows moisture to penetrate through the base pad to the food packaging above, causing products such as cakes and mooncakes to absorb moisture and spoil. At the same time, the wear resistance of the base pad is not ideal, and long-term wear will seriously affect the service life of the base pad. In addition, the low compressive strength of the base pad affects the stability of the support. Therefore, we provide a moisture-proof paper pallet base pad. Utility Model Content

[0005] The purpose of this invention is to provide a moisture-proof paper tray bottom pad to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a moisture-proof paper pallet bottom pad, including a paper pallet top plate, three bottom pad bodies are arranged below the paper pallet top plate, the bottom pad bodies and the paper pallet top plate are connected by a connecting support assembly, the bottom pad body is composed of a wear-resistant and waterproof layer, a moisture-proof layer, a first pressure-resistant layer, a base layer, a second pressure-resistant layer, a reinforcing layer and a toughness layer, and the moisture-proof layer is arranged on top of the wear-resistant and waterproof layer.

[0007] Preferably, the first compressive layer is disposed on top of the moisture-proof layer, the base layer is disposed on top of the first compressive layer, the second compressive layer is disposed on top of the base layer, the reinforcing layer is disposed on top of the second compressive layer, and the toughness layer is disposed on top of the reinforcing layer.

[0008] Preferably, the wear-resistant and waterproof layer is made of modified polypropylene film, the surface of which is treated with a wear-resistant coating containing 2%-3% titanium dioxide particles, and the thickness of the wear-resistant and waterproof layer is 0.1-0.15 mm.

[0009] Preferably, the moisture-proof layer is made of a biodegradable polyvinyl alcohol film with a thickness of 0.08-0.12 mm and a corona-treated surface. The moisture-proof layer and the wear-resistant and waterproof layer are bonded together with hot melt adhesive.

[0010] Preferably, both the first and second compression-resistant layers are made of honeycomb paper core structure, and the honeycomb paper core material has a density of 80-100 g / m³. 2 Sulfate paper with a honeycomb pore size of 8-10 mm and a wall thickness of 0.15-0.2 mm, wherein the overall thickness of the honeycomb paper core is 1-1.5 mm.

[0011] Preferably, the base layer consists of 4 layers of 120-150g / m². 2 It is made of refined kraft paper composite, the layers of which are bonded together with starch adhesive, with an overall thickness of 2-3mm. The reinforcing layer is made of flax fiber reinforced paper with a thickness of 0.1-0.12mm. The toughness layer is made of polylactic acid film with a thickness of 0.06-0.1mm. The entire edge of the base pad is coated with a moisture-proof material, which is an environmentally friendly polyurethane waterproof coating.

[0012] Preferably, the connecting support assembly includes support blocks, and the number of support blocks is nine and they are respectively installed at the bottom of the top plate of the paper tray. The top of the bottom pad body is glued to the bottom of three of the support blocks. Two positioning grooves are opened at the bottom of the support blocks. A positioning block is installed on the top of the bottom pad body at the position corresponding to the positioning groove. The top of the positioning block passes through the positioning groove and extends into its interior.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model solves the core problem of food spoilage caused by the failure of existing bottom pads to prevent moisture through a synergistic design of bottom wear-resistant and waterproof, middle core moisture-proof, and edge closed-loop moisture-proof. The wear-resistant and waterproof layer can resist ground friction and directly block the penetration of ground water and condensation, preventing moisture from directly contacting the inner layer. The moisture-proof layer can control the water vapor permeability to an extremely low level, preventing environmental moisture from invading through the fiber gaps. The environmentally friendly polyurethane waterproof coating applied to the entire edge of the bottom pad body forms a closed-loop moisture-proof barrier, preventing moisture from invading from the side and improving the moisture-proof and waterproof effect.

[0015] 2. This utility model improves the compressive strength of the base pad body by setting a first compressive layer and a second compressive layer. The honeycomb structure can distribute the load. The base layer, as the core load-bearing skeleton, can evenly transfer the supporting force of the upper and lower compressive layers, avoiding local stress concentration that could lead to base pad deformation. The combination of the reinforcing layer and the toughening layer improves the strength and tear resistance of the base pad, preventing the base pad from delaminating and tearing due to external force during handling. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention from a bottom view;

[0018] Figure 3 This is a three-dimensional structural diagram of the paper tray top plate and bottom pad body of this utility model separated.

[0019] Figure 4 This is a three-dimensional structural diagram of the paper tray top plate and bottom pad body of this utility model, separated from the bottom view.

[0020] Figure 5 This is an exploded three-dimensional view of the base pad body of this utility model.

[0021] In the diagram: 1. Top plate of paper pallet; 2. Bottom pad body; 21. Wear-resistant and waterproof layer; 22. Moisture-proof layer; 23. First compression-resistant layer; 24. Base layer; 25. Second compression-resistant layer; 26. Reinforcing layer; 27. Toughness layer; 3. Connecting support component; 31. Support block; 32. Positioning groove; 33. Positioning block. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-5 A moisture-proof paper pallet base includes a paper pallet top plate 1, wherein the paper pallet top plate 1 is made of 220g / m³ material. 2The high-strength kraft paper, 3mm thick, is coated with a 0.05mm thick water-based moisture-proof agent. The top plate 1 of the paper pallet serves as the direct load-bearing surface for the food packaging, supporting stacked food packaging. Three bottom pad bodies 2 are located below the top plate 1, connected to the top plate 1 via a connecting support assembly 3. The entire edge of the bottom pad body 2 is coated with an environmentally friendly polyurethane waterproof coating, applied by brushing or spraying to cover a 15mm width and 0.15mm thickness, forming a closed-loop moisture barrier. The bottom pad body 2, as the bottom protection and load-bearing core of the paper pallet, directly contacts the ground or transport vehicle. Its seven-layer composite structure integrates wear resistance, waterproofing, moisture resistance, pressure resistance, tear resistance, and toughness, bearing the entire load transmitted by the top plate and preventing upward penetration of ground moisture. The connecting support assembly 3 includes nine support blocks 31, each installed separately. At the bottom of the top plate 1 of the paper pallet, the top of the bottom pad body 2 is bonded to the bottom of three support blocks 31. Each of the three support blocks 31 corresponds to one bottom pad body 2, serving as a connecting bridge between the top plate and the bottom pad, transferring the load of the top plate to the bottom pad, while increasing the contact area between the two and dispersing local pressure. The distributed layout of the three support blocks 31 ensures that the load of each bottom pad body 2 is evenly distributed to three contact points, avoiding excessive local pressure that could cause deformation of the bottom pad and improving connection stability. Two positioning grooves 32 are provided at the bottom of the support blocks 31. Positioning blocks 33 are installed on the top of the bottom pad body 2 at positions corresponding to the positioning grooves 32. The top of the positioning blocks 33 penetrates through the positioning grooves 32 and extends into them. The surface of the positioning blocks 33 is bonded to the inner wall of the positioning grooves 32. The positioning grooves 32 and the positioning blocks 33 fit precisely together, achieving positioning alignment between the bottom pad and the support blocks 31. The bonded connection prevents the bottom pad from shifting laterally during handling and bumping.

[0024] The base body 2 consists of a wear-resistant and waterproof layer 21, a moisture-proof layer 22, a first compression-resistant layer 23, a base layer 24, a second compression-resistant layer 25, a reinforcing layer 26, and a toughness layer 27. The wear-resistant and waterproof layer 21 is made of modified polypropylene film, and the surface of the modified polypropylene film is treated with a wear-resistant coating containing 3% titanium dioxide particles. The wear-resistant and waterproof layer 21 is 0.15mm thick, with a waterproof rating of IPX6, resisting ground friction and wear, while preventing ground water and condensation from directly penetrating into the inner structure, thus preventing... A moisture barrier 22 is placed on top of the wear-resistant and waterproof layer 21. The moisture barrier 22 is made of a biodegradable polyvinyl alcohol (PVA) film with a thickness of 0.12 mm and a corona-treated surface. The dense structure of the biodegradable PVA film prevents gaseous moisture from penetrating the inner layer through fiber gaps. The moisture barrier 22 and the wear-resistant and waterproof layer 21 are bonded together with hot melt adhesive. A first compression-resistant layer 23 is placed on top of the moisture barrier 22, and a base layer 24 is placed on top of the first compression-resistant layer 23. The base layer 24 consists of four layers of 150 g / m³ material. 2The base layer 24 is made of refined kraft paper composite and serves as the core load-bearing layer of the base body 2, ensuring the overall structural stability. The layers of the base layer 24 are bonded together with starch adhesive, and the overall thickness is 3mm. The second compression-resistant layer 25 is placed on top of the base layer 24. Both the first compression-resistant layer 23 and the second compression-resistant layer 25 are made of honeycomb paper core structure, and the honeycomb paper core material is 100g / m³. 2 The base pad is made of sulfate paper with a honeycomb pore size of 10mm, a wall thickness of 0.2mm, and an overall honeycomb paper core thickness of 1.5mm. The hexagonal support structure of the honeycomb disperses vertical loads and buffers local impact forces during grounding or transportation, forming a double protection against pressure from both top and bottom. The reinforcing layer 26 is set on top of the second pressure-resistant layer 25. The reinforcing layer 26 is made of flax fiber reinforced paper with a thickness of 0.12mm. The interwoven fiber structure of the flax fiber reinforced paper improves the tear resistance of the base pad and prevents the edges or interlayers of the base pad from tearing due to external force during handling. The toughness layer 27 is set on top of the reinforcing layer 26. The toughness layer 27 is made of polylactic acid film with a thickness of 0.1mm. It increases the overall toughness of the base pad and adapts to slightly uneven ground or vehicle floor during transportation, preventing the base pad from breaking due to excessive rigidity.

[0025] EVA hot melt adhesive is sprayed onto the wear-resistant and waterproof layer 21, covering the moisture-proof layer 22, and pressed for 3 minutes. Water-based adhesive is applied to the moisture-proof layer 22, and the first compression-resistant layer 23 is attached. The flat block is left to stand at room temperature for 40 minutes to cure. Starch adhesive is rolled onto the lower surface of the base layer 24, and the first compression-resistant layer 23 is attached. It is pressed for 3 minutes. Water-based adhesive is applied to the upper surface of the base layer 24, and the second compression-resistant layer 25 is attached. Water-based adhesive is applied to the second compression-resistant layer 25, and the reinforcing layer 26 is covered. After light pressure, it is cured at room temperature. UV-curing adhesive is applied to the reinforcing layer 26, and then the toughness layer 27 is covered on it. It is cured by UV irradiation for 15 seconds, thus forming the base pad body 2.

[0026] When using, stack the packaging of baked goods such as cakes and mooncakes evenly on the surface of the top plate 1 of the paper pallet. During transportation or storage, ensure that the wear-resistant and waterproof layer 21 of the base pad body 2 is in direct contact with the ground, truck compartment or shelf, and avoid the side or top of the base pad touching the ground first.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A moisture barrier paper pallet pad, characterized by: The pallet includes a top plate (1), and three bottom pad bodies (2) are provided below the top plate (1). The bottom pad bodies (2) and the top plate (1) are connected by a connecting support assembly (3). The bottom pad bodies (2) are composed of a wear-resistant waterproof layer (21), a moisture-proof layer (22), a first pressure-resistant layer (23), a base layer (24), a second pressure-resistant layer (25), a reinforcing layer (26), and a toughness layer (27). The moisture-proof layer (22) is located on top of the wear-resistant waterproof layer (21).

2. The moisture barrier paper pallet pad of claim 1, wherein: The first pressure-resistant layer (23) is disposed on top of the moisture-proof layer (22), the base layer (24) is disposed on top of the first pressure-resistant layer (23), the second pressure-resistant layer (25) is disposed on top of the base layer (24), the reinforcing layer (26) is disposed on top of the second pressure-resistant layer (25), and the toughness layer (27) is disposed on top of the reinforcing layer (26).

3. The moisture barrier paper pallet pad of claim 1, wherein: The wear-resistant and waterproof layer (21) is made of modified polypropylene film. The surface of the modified polypropylene film is treated with a wear-resistant coating. The wear-resistant coating contains 2%-3% titanium dioxide particles. The thickness of the wear-resistant and waterproof layer (21) is 0.1-0.15 mm.

4. The moisture barrier paper pallet pad of claim 1, wherein: The moisture-proof layer (22) is made of a biodegradable polyvinyl alcohol film with a thickness of 0.08-0.12 mm and a corona treatment on the surface. The moisture-proof layer (22) and the wear-resistant and waterproof layer (21) are bonded together by hot melt adhesive.

5. The moisture-proof paper tray bottom pad according to claim 1, characterized in that: The first compression layer (23) and the second compression layer (25) are both made of honeycomb paper core structure. The honeycomb paper core material is 80-100g / m² sulfate paper, the honeycomb pore size is 8-10mm, the wall thickness is 0.15-0.2mm, and the overall thickness of the honeycomb paper core is 1-1.5mm.

6. The moisture barrier paper pallet pad of claim 1, wherein: The base layer (24) is made of four layers of refined kraft paper with a thickness of 120-150g / m². The layers of the base layer (24) are bonded together with starch adhesive. The overall thickness is 2-3mm. The reinforcing layer (26) is made of flax fiber reinforced paper with a thickness of 0.1-0.12mm. The toughness layer (27) is made of polylactic acid film with a thickness of 0.06-0.1mm. The entire edge of the base pad body (2) is coated with a moisture-proof material, which is an environmentally friendly polyurethane waterproof coating.

7. The moisture barrier paper pallet pad of claim 1, wherein: The connecting support assembly (3) includes support blocks (31), there are nine support blocks (31) and they are installed at the bottom of the top plate (1) of the paper tray. The top of the bottom pad body (2) is attached to the bottom of the three support blocks (31). The bottom of the support block (31) has two positioning grooves (32). The top of the bottom pad body (2) is equipped with a positioning block (33) corresponding to the positioning groove (32). The top of the positioning block (33) passes through the positioning groove (32) and extends into it.

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