A high-strength composite paper can resistant to compression deformation

Abstract

This utility model discloses a high-strength composite paper can resistant to compression deformation, including a can body, a can bottom, and a can lid; the can body has a can bottom at the lower end and a can lid at the upper end; the can body is provided with an inner liner layer, a reinforcing layer, a composite paper layer, and a wear-resistant outer layer from the inside out; the reinforcing layer has reinforcing ribs inside. The inner liner layer is made of food-grade film with a thickness of 0.05-0.2mm. This utility model, by setting a reinforcing layer composed of a reinforcing shell and reinforcing ribs, enhances the compressive strength of the composite paper can's sides through the ring-shaped reinforcing ribs with a trapezoidal cross-section. Furthermore, by adhering and assembling the reinforcing ribs to the reinforcing shell, the reinforcing shell allows the individual reinforcing ribs to be combined into a whole, avoiding insufficient strength at the adhesion points of the individual reinforcing ribs; thus effectively enhancing the compressive and deformation resistance of the composite paper can body; by adding anti-slip texture to the wear-resistant outer layer, the anti-slip efficiency of the composite paper can's outer surface can be increased, making it easier for users to hold.

Description

Technical Field

[0001] This utility model relates to the field of composite paper can technology, specifically a high-strength composite paper can that is resistant to extrusion deformation. Background Technology

[0002] Composite paper cans are packaging containers made by combining paper as the main material with materials such as plastic and aluminum foil through a composite process. They are widely used in food, pharmaceuticals, cosmetics, chemicals and other fields, and therefore the demand in the market is increasing.

[0003] In the prior art, utility model patent application number CN202420781497.4 discloses a composite paper can. The composite paper can includes a composite can body, a seal at one end of the composite can body, and a composite can bottom at the other end of the composite can body. The composite can body includes a first paper layer and a first aluminum foil layer located on the inner periphery of the first paper layer. The composite can bottom includes a substrate and a connecting cylinder. The substrate includes a third paper layer and a third aluminum foil layer. The connecting cylinder includes a second paper layer and a second aluminum foil layer located on the outer periphery of the second paper layer. The composite paper can also include a heat-sealing film layer connecting the first aluminum foil layer and the second aluminum foil layer. This composite paper can combines the paper layer and aluminum foil layer, allowing for a further reduction in the thickness of the aluminum foil layer. Therefore, compared to traditional aluminum foil can bottoms, it is lighter, and the reduced thickness further lowers costs. Furthermore, the composite can body and composite can bottom are made of relatively uniform materials, facilitating recycling.

[0004] The aforementioned patent discloses a composite paper can structure, which effectively reduces the thickness of the aluminum foil layer, thereby lowering production costs. However, the composite paper can is made by bonding multiple layers of paper and aluminum foil together, and the can body lacks a strong supporting structure, resulting in poor pressure resistance and deformation resistance. Further improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a high-strength composite paper can that is resistant to compression deformation, thereby improving the problem that existing composite paper cans have poor resistance to pressure and deformation due to the lack of a strong supporting structure.

[0006] This utility model is implemented as follows: A high-strength composite paper can resistant to compression deformation includes a can body, a can bottom, and a can lid; the can body has a can bottom at the lower end and a can lid at the upper end; the can body is provided with an inner lining layer, a reinforcing layer, a composite paper layer, and a wear-resistant outer layer from the inside to the outside; the reinforcing layer has reinforcing ribs inside.

[0007] Preferably, the inner liner is made of food-grade film and the thickness of the inner liner is 0.05-0.2 mm.

[0008] Preferably, the reinforcing layer includes a reinforcing shell and reinforcing ribs, wherein the reinforcing ribs are annular structures and are embedded inside the reinforcing shell.

[0009] Preferably, the reinforcing shell is made of high-strength corrugated paper, and the shell wall thickness is 1mm-2mm.

[0010] Preferably, the reinforcing rib includes a first rib and a second rib; the cross-section of the first rib and the second rib is a trapezoidal structure, and multiple first ribs and second ribs are alternately arranged from top to bottom.

[0011] Preferably, both the first and second ribs are made of rigid cardboard, and the upper base length of their trapezoidal cross-section is 5-8mm, the lower base length is 8-12mm, and the height is 3-5mm; the upper base edge of the first rib and the lower base edge of the second rib are located on the same side.

[0012] Preferably, the wear-resistant outer layer is made of polyvinyl chloride film, and the thickness of the wear-resistant outer layer is 0.1-0.2 mm.

[0013] Preferably, it also includes anti-slip texture, and the outer surface of the wear-resistant outer layer is provided with multiple anti-slip textures from top to bottom.

[0014] Preferably, the can lid includes a second snap fastener, the inner circumferential surface of the can lid is provided with the second snap fastener, and the outer circumferential surface of the wear-resistant outer layer is provided with a first snap fastener adapted to the second snap fastener. The can lid is installed on the upper port of the can body through the first snap fastener and the second snap fastener.

[0015] Preferably, the bottom of the can is made of food-grade rigid aluminum foil, the thickness of the bottom of the can is 0.3-0.5mm, and the contact between the inner lining and the bottom of the can is sealed.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model is provided with a reinforcing layer composed of a reinforcing shell and reinforcing ribs. The reinforcing ribs, which have a ring structure and a trapezoidal cross-section, enhance the compressive strength of the side of the composite paper can. By attaching and assembling the reinforcing ribs to the reinforcing shell, the reinforcing shell can combine the various reinforcing ribs into a whole, avoiding insufficient strength at the adhesion points of the individual reinforcing ribs. Thus, the compressive strength and deformation resistance of the composite paper can body are effectively enhanced.

[0017] 2. This utility model increases the anti-slip efficiency of the outer surface of the composite paper can by adding anti-slip texture to the wear-resistant outer layer, thus making it easier for users to hold. Attached Figure Description

[0018] Figure 1 This is a top view of the tank body of this utility model; Figure 2 This is a cross-sectional structural diagram of the tank body of this utility model; Figure 3 This is a utility model Figure 2 Schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the reinforcing layer of this utility model; Figure 5 This is a schematic diagram of the reinforcing rib structure of this utility model; Figure 6 This is a schematic diagram of the assembly structure of the first and second reinforcing bars of this utility model; Figure 7 This is a schematic diagram of the structure of the can lid of this utility model.

[0019] In the diagram: 1. Inner lining layer; 2. Reinforcing layer; 3. Composite paper layer; 4. Wear-resistant outer layer; 401. First buckle; 402. Anti-slip texture; 5. Can bottom; 6. Reinforcing shell; 7. Reinforcing rib; 701. First rib; 702. Second rib; 8. Can lid; 801. Second buckle. Detailed Implementation

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1 like Figure 1 , Figure 2 and Figures 4-6As shown, a high-strength composite paper can resistant to compression deformation includes a can body, a can bottom 5, and a can lid 8. The can bottom 5 is located at the lower end of the can body, and the can lid 8 is located at the upper end. The can body, from the inside out, consists of an inner liner 1, a reinforcing layer 2, a composite paper layer 3, and a wear-resistant outer layer 4. The inner liner 1 and the reinforcing layer 2 are bonded together using a food-grade water-based polyurethane adhesive. The reinforcing layer 2 and the composite paper layer 3 are bonded together using a modified starch adhesive. The composite paper layer 3 and the wear-resistant outer layer 4 are bonded together using a solvent-based acrylic adhesive. The reinforcing layer 2 has internal reinforcing ribs 7. The inner liner 1 is made of food-grade film with a thickness of 0.05-0.2 mm. The reinforcing layer 2 includes a reinforcing shell 6 and reinforcing ribs 7. The reinforcing ribs 7 are annular structures and are embedded inside the reinforcing shell 6. The reinforcing shell 6 is made of high-strength corrugated paper with a wall thickness of 1 mm-2 mm. The reinforcing rib 7 includes a first rib 701 and a second rib 702; both the first rib 701 and the second rib 702 have trapezoidal cross-sections, and multiple first ribs 701 and second ribs 702 are alternately arranged from top to bottom. Both the first rib 701 and the second rib 702 are made of rigid cardboard, and the upper base length of their trapezoidal cross-sections is 5-8 mm, the lower base length is 8-12 mm, and the height is 3-5 mm; the upper base edge of the first rib 701 and the lower base edge of the second rib 702 are located on the same side. The reinforcing shell 6 and the reinforcing rib 7 in the reinforcing layer 2 are also bonded using modified starch adhesive. The can bottom 5 is made of food-grade rigid aluminum foil, 0.3-0.5mm thick, which has excellent sealing properties, corrosion resistance, and structural strength. It complements the food-grade film of the inner liner 1, ensuring the safety of the contents (especially food) during storage. Its rigidity also enhances the can bottom's resistance to compression, matching the high-strength design of the overall composite paper can. The edge of the can bottom 5 is folded upwards to form a ring-shaped fold that matches the inward-rolling structure at the bottom of the can body. The inner side of the fold is heat-fused to the end of the inner liner 1, while the outer side is bonded to the folded portion of the wear-resistant outer layer 4 with high-strength environmentally friendly adhesive. Furthermore, the support platform of the reinforcing shell 6 is further reinforced with dotted adhesive bonding to the center of the bottom surface of the can bottom 5. This multi-layered, nested, heat-fused, and adhesive-bonded installation method ensures a tight seal between the can bottom and the can body, while the reinforcing shell enhances the overall connection strength, effectively resisting the risk of deformation caused by external compression.

[0022] like Figure 2 , Figure 3 and Figure 7As shown, the wear-resistant outer layer 4 is made of polyvinyl chloride film, and its thickness is 0.1-0.2 mm. It also includes anti-slip textures 402, with multiple anti-slip textures 402 arranged sequentially from top to bottom on the outer surface of the wear-resistant outer layer 4. The can lid 8 includes a second snap 801. The inner circumference of the can lid 8 is provided with the second snap 801, and the outer circumference of the wear-resistant outer layer 4 is provided with a first snap 401 that matches the second snap 801. The can lid 8 is installed at the upper port of the can body via the first snap 401 and the second snap 801.

[0023] Example 2 like Figure 1 , Figure 2 and Figures 4-6 As shown, a high-strength composite paper can resistant to compression deformation includes a can body, a can bottom 5, and a can lid 8. The can bottom 5 is located at the lower end of the can body, and the can lid 8 is located at the upper end. The can body is provided with an inner liner 1, a reinforcing layer 2, a composite paper layer 3, and a wear-resistant outer layer 4 from the inside out. The reinforcing layer 2 has reinforcing ribs 7 inside. The inner liner 1 is made of food-grade film with a thickness of 0.05-0.2 mm. The reinforcing layer 2 includes a reinforcing shell 6 and reinforcing ribs 7. The reinforcing ribs 7 have a ring structure and are embedded inside the reinforcing shell 6. The reinforcing shell 6 is made of high-strength corrugated paper with a wall thickness of 1 mm-2 mm. The reinforcing ribs 7 include a first rib 701 and a second rib 702. The cross-section of the first rib 701 and the second rib 702 is trapezoidal, and multiple first ribs 701 and second ribs 702 are alternately arranged from top to bottom. Both the first rib 701 and the second rib 702 are made of rigid cardboard, and the upper base length of their trapezoidal cross-section is 5-8mm, the lower base length is 8-12mm, and the height is 3-5mm; the upper base edge of the first rib 701 and the lower base edge of the second rib 702 are located on the same side.

[0024] like Figure 2 , Figure 3 and Figure 7 As shown, the wear-resistant outer layer 4 is made of polyvinyl chloride film, and its thickness is 0.1-0.2 mm. It also includes anti-slip textures 402, with multiple anti-slip textures 402 arranged sequentially from top to bottom on the outer surface of the wear-resistant outer layer 4. The can lid 8 includes a second snap 801. The inner circumference of the can lid 8 is provided with the second snap 801, and the outer circumference of the wear-resistant outer layer 4 is provided with a first snap 401 that matches the second snap 801. The can lid 8 is installed at the upper port of the can body via the first snap 401 and the second snap 801.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high strength composite paper can resistant to deformation by crushing, comprising a can body, characterised in that, It also includes a can bottom (5) and a can lid (8); the can body has a can bottom (5) at the lower end and a can lid (8) at the upper end; the can body is provided with an inner lining layer (1), a reinforcing layer (2), a composite paper layer (3) and a wear-resistant outer layer (4) from the inside to the outside; the reinforcing layer (2) is provided with reinforcing ribs (7) inside.

2. A high strength composite paper can resistant to deformation by crushing according to claim 1, wherein The inner lining (1) is made of food-grade film and has a thickness of 0.05-0.2 mm.

3. The high strength composite paper can according to claim 1, wherein The reinforcing layer (2) includes a reinforcing shell (6) and a reinforcing rib (7). The reinforcing rib (7) is a ring structure and is embedded inside the reinforcing shell (6).

4. A high-strength composite paper can resistant to extrusion deformation according to claim 3, characterized in that, The reinforcing shell (6) is made of high-strength corrugated paper, and the shell wall thickness of the reinforcing shell (6) is 1mm-2mm.

5. A high-strength composite paper can resistant to extrusion deformation according to claim 3, characterized in that, The reinforcing rib (7) includes a first rib (701) and a second rib (702); the cross-section of the first rib (701) and the second rib (702) is a trapezoidal structure, and multiple first ribs (701) and second ribs (702) are alternately arranged from top to bottom.

6. A high-strength composite paper can resistant to extrusion deformation according to claim 5, characterized in that, The first rib (701) and the second rib (702) are both made of rigid cardboard, and the upper base length of their trapezoidal cross section is 5-8mm, the lower base length is 8-12mm, and the height is 3-5mm; the upper base edge of the first rib (701) and the lower base edge of the second rib (702) are located on the same side.

7. A high-strength composite paper can resistant to extrusion deformation according to claim 1, characterized in that, The wear-resistant outer layer (4) is made of polyvinyl chloride film and the thickness of the wear-resistant outer layer (4) is 0.1-0.2 mm.

8. A high-strength composite paper can resistant to extrusion deformation according to claim 7, characterized in that, It also includes anti-slip texture (402), and the outer surface of the wear-resistant outer layer (4) is provided with multiple anti-slip textures (402) from top to bottom.

9. A high-strength composite paper can resistant to extrusion deformation according to claim 1, characterized in that, The can lid (8) includes a second buckle (801). The inner ring surface of the can lid (8) is provided with the second buckle (801). The outer ring surface of the wear-resistant outer layer (4) is provided with a first buckle (401) that matches the second buckle (801). The can lid (8) is installed on the upper port of the can body through the first buckle (401) and the second buckle (801).

10. A high-strength composite paper can resistant to extrusion deformation according to claim 1, characterized in that, The bottom of the can (5) is made of food-grade hard aluminum foil, and the thickness of the bottom of the can (5) is 0.3-0.5mm. The inner lining (1) and the bottom of the can (5) are sealed at the joint.

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