A new environment-friendly impact-resistant double-layer foamed composite sheet and a packaging hose

Abstract

The utility model discloses a novel environmental protection impact resistant double -layer foamed composite sheet and packing hose. The composite sheet solves the strength problem of traditional composite hose due to the thickness and the single structure on one hand, and provides excellent impact resistance for large package in express delivery and logistics, and on the other hand, the composite sheet is provided with double -layer foamed film layer, which can reduce the amount of polyethylene material and is beneficial to plastic reduction and environmental protection. Further, the novel environmental protection impact resistant double -layer foamed composite sheet can endow product package with unique appearance texture, and provide green environmental protection and differentiated product package for brand and consumer.

Description

Technical Field

[0001] This utility model belongs to the technical field of packaging containers and composite sheets, specifically relating to a new type of environmentally friendly and impact-resistant double-layer foamed composite sheet and packaging hose. Background Technology

[0002] With the increasing trend of family-sized and large-volume packaging, and the emergence of new sales models such as e-commerce and micro-commerce, traditional composite flexible tubes often deform and break during express delivery for large-capacity packaging. Strengthening the tubes by adding more material inevitably increases the amount of plastic used, contradicting the goal of reducing plastic consumption and promoting environmental protection. Therefore, there is an urgent need to develop a new type of environmentally friendly, impact-resistant double-layer foamed composite sheet and packaging flexible tube that can provide both impact resistance and environmental benefits by reducing plastic consumption. Utility Model Content

[0003] To overcome the shortcomings and drawbacks of existing technologies, the primary objective of this utility model is to provide a novel environmentally friendly and impact-resistant double-layer foamed composite sheet. This composite sheet solves many problems caused by the loose structure and uneven surface of traditional foamed materials, exhibiting excellent impact resistance. Furthermore, the double-layer foaming film reduces the amount of polyethylene material used, further contributing to plastic reduction and environmental protection.

[0004] The second objective of this utility model is to provide a novel environmentally friendly and impact-resistant double-layer foamed composite packaging tube.

[0005] The primary objective of this utility model can be achieved through the following technical solution:

[0006] A novel environmentally friendly and impact-resistant double-layer foamed composite sheet comprises, from the outside to the inside, an outer printed layer, a first foamed film layer, an intermediate layer, a second foamed film layer, and an inner layer; a first adhesive layer is disposed between the outer printed layer and the first foamed film layer, a second adhesive layer is disposed between the first foamed film layer and the intermediate layer, a third adhesive layer is disposed between the intermediate layer and the second foamed film layer, and a fourth adhesive layer is disposed between the second foamed film layer and the inner layer.

[0007] Preferably, the outer printed layer and the inner layer are polyethylene (PE) layers;

[0008] Preferably, the first foamed film layer and the second foamed film layer are gradient foamed polyethylene (PE) layers;

[0009] Preferably, the intermediate layer is a high-density polyethylene (HDPE) layer.

[0010] Preferably, the first adhesive layer, the second adhesive layer, the third adhesive layer, and the fourth adhesive layer are low-density polyethylene (LDPE) layers.

[0011] Preferably, the thickness of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet is 400-500 μm.

[0012] Preferably, the thickness of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet is 425 μm.

[0013] The primary objective of this utility model can also be achieved through the following technical solutions:

[0014] A novel environmentally friendly and impact-resistant double-layer foamed composite sheet comprises, from the outside to the inside, an outer printed layer, a first foamed film layer, an intermediate layer, a second foamed film layer, a barrier layer, and an inner layer; a first adhesive layer is disposed between the outer printed layer and the first foamed film layer, a second adhesive layer is disposed between the first foamed film layer and the intermediate layer, a third adhesive layer is disposed between the intermediate layer and the second foamed film layer, a fifth adhesive layer is disposed between the second foamed film layer and the barrier layer, and a sixth adhesive layer is disposed between the barrier layer and the inner layer.

[0015] Preferably, the first adhesive layer, the second adhesive layer, and the third adhesive layer are polyurethane (PU) layers.

[0016] Preferably, the barrier layer is an ethylene-vinyl alcohol copolymer (EVOH) layer.

[0017] Preferably, the fifth and sixth adhesive layers are low-density polyethylene (LDPE) layers.

[0018] The gradient foamed PE layer of this invention achieves a progressive distribution of the bubble structure inside the material through existing novel gradient foaming technology. That is, the surface of the film maintains a relatively high density and small bubble size, while it gradually becomes looser and the bubble size gradually increases as it approaches the interior. This can ensure surface strength while retaining the lightweight and cushioning properties of the interior. The film gradually becomes looser from the surface to the interior, which not only ensures surface strength but also retains the internal cushioning performance.

[0019] The second objective of this utility model is achieved through the following technical solution:

[0020] A novel environmentally friendly and impact-resistant double-layer foamed composite packaging tube includes a cap and a body, wherein the body is made of a novel environmentally friendly and impact-resistant double-layer foamed composite sheet.

[0021] Preferably, the new type of environmentally friendly and impact-resistant double-layer foamed composite packaging hose is made by cutting the printed sheet according to the hose specifications (pipe diameter, length), and completing the rolling, welding, shoulder injection and capping in one step through high-speed tube making equipment.

[0022] Advantages and beneficial effects of this utility model compared to the prior art:

[0023] The novel environmentally friendly and impact-resistant double-layer foamed composite sheet of this utility model, by setting a double-layer foamed film layer, can reduce the amount of polyethylene material used (the same thickness of composite sheet can use less plastic material), which is conducive to reducing plastic and protecting the environment. On the other hand, it also solves the problem of poor impact resistance caused by the thin structure and thickness of traditional composite sheets. Attached Figure Description

[0024] Figure 1 The structural diagram of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet prepared in Example 1;

[0025] Figure 2 The structural diagram of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet prepared in Example 2;

[0026] The layers are: outer printed layer-101, first adhesive layer-102, first foamed film layer-103, second adhesive layer-104, intermediate layer-105, third adhesive layer-106, second foamed film layer-107, fourth adhesive layer-108, inner layer-109, first glue layer-1010, second glue layer-1011, third glue layer-1012, barrier layer-1013, fifth adhesive layer-1014, and sixth adhesive layer-1015. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0028] Example 1

[0029] like Figure 1 As can be seen, the novel environmentally friendly and impact-resistant double-layer foamed composite sheet described in this embodiment comprises, from the outside to the inside, an outer printed layer 101, a first adhesive layer 102, a first foamed film layer 103, a second adhesive layer 104, an intermediate layer 105, a third adhesive layer 106, a second foamed film layer 107, a fourth adhesive layer 108, and an inner layer 109. The total thickness of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet is 425 μm, and its basis weight is 346.84 g.

[0030] Specifically, in this embodiment, the outer printed layer 101 is a PE layer with a thickness of 50 μm;

[0031] The first adhesive layer 102 is an LDPE layer with a thickness of 16 μm;

[0032] The first foamed film layer 103 is a gradient foamed PE layer with a thickness of 95 μm;

[0033] The second adhesive layer 104 is an LDPE layer with a thickness of 16 μm;

[0034] The intermediate layer 105 is an HDPE layer with a thickness of 70um;

[0035] The third adhesive layer 106 is an LDPE layer with a thickness of 16µm;

[0036] The second foamed film layer 107 is a gradient foamed PE layer with a thickness of 95 μm;

[0037] The fourth adhesive layer 108 is an LDPE layer with a thickness of 16µm;

[0038] The inner layer 109 is a PE layer with a thickness of 51 μm.

[0039] The novel environmentally friendly and impact-resistant double-layer foamed composite sheet prepared according to this embodiment is used to prepare composite hoses.

[0040] Example 2

[0041] like Figure 2 As can be seen, the novel environmentally friendly and impact-resistant double-layer foamed composite sheet described in this embodiment includes an outer printed layer 101, a first adhesive layer 1010, a first foamed film layer 103, a second adhesive layer 1011, an intermediate layer 105, a third adhesive layer 1012, a second foamed film layer 107, a fifth adhesive layer 1013, a barrier layer 1014, a sixth adhesive layer 1015, and an inner layer 109. The total thickness of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet is 425 μm, and its basis weight is 349.79 g.

[0042] Specifically, in this embodiment, the outer printed layer 101 is a PE layer with a thickness of 50 μm;

[0043] The first adhesive layer 1010 is a polyurethane layer with a thickness of 4 μm;

[0044] The first foamed film layer 103 is a gradient foamed PE layer with a thickness of 80 μm;

[0045] The second adhesive layer 1011 is a polyurethane layer with a thickness of 4 μm;

[0046] The intermediate layer 105 is an HDPE layer with a thickness of 70um;

[0047] The third adhesive layer 1012 is a polyurethane layer with a thickness of 4 μm;

[0048] The second foamed film layer 107 is a gradient foamed PE layer with a thickness of 80 μm;

[0049] The fifth adhesive layer 1013 is an LDPE layer with a thickness of 14 μm;

[0050] The barrier layer 1014 is an ethylene-vinyl alcohol copolymer (EVOH) layer with a thickness of 55 μm;

[0051] The sixth adhesive layer 1015 is an LDPE layer with a thickness of 14um;

[0052] The inner layer 109 is a PE layer with a thickness of 50 μm.

[0053] The novel environmentally friendly and impact-resistant double-layer foamed composite sheet prepared according to this embodiment is used to prepare composite hoses.

[0054] The weight of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet prepared in Example 1 is 346.84g, and the weight of the novel environmentally friendly and impact-resistant double-layer foamed composite sheet prepared in Example 2 is 349.79g. Compared with the traditional composite sheet in the existing materials (sheet with a thickness of 425um and a weight of 389.84g), Example 1 reduces plasticity by 11%, and Example 2 reduces plasticity by 10%.

[0055] Test Implementation Examples

[0056] Table 1 below shows the test experiments conducted on the novel environmentally friendly impact-resistant double-layer foamed composite packaging hoses prepared in Examples 1 and 2. The "target" refers to the performance requirements of the packaging hoses prepared according to this invention, while the "actual" refers to the actual performance of the novel impact-resistant foamed composite packaging hoses prepared in this embodiment. As shown in the table, the novel environmentally friendly impact-resistant double-layer foamed composite packaging hoses prepared in Examples 1 and 2 meet the target test requirements and have excellent shock resistance.

[0057] Table 1 shows the test results of the novel environmentally friendly and impact-resistant double-layer foamed composite packaging tube described in Examples 1 to 3.

[0058] Explosion test drop test Target 1.75 bar * 30 seconds 1.5 meters, 3 times, 150g Example 1 2 bar * 30 seconds 1.5 meters, 3 times, 170g Example 2 2 bar * 30 seconds 1.5 meters, 3 times, 200g

[0059] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A novel environmentally friendly and impact-resistant double-layer foamed composite sheet, characterized in that, From the outside to the inside, it includes an outer printed layer, a first foamed film layer, an intermediate layer, a second foamed film layer, and an inner layer; a first adhesive layer is provided between the outer printed layer and the first foamed film layer, a second adhesive layer is provided between the first foamed film layer and the intermediate layer, a third adhesive layer is provided between the intermediate layer and the second foamed film layer, and a fourth adhesive layer is provided between the second foamed film layer and the inner layer.

2. The novel eco-friendly impact resistant double layered foamed composite sheet material as claimed in claim 1, wherein, The outer printed layer and the inner layer are polyethylene layers.

3. The novel eco-friendly impact resistant double layered foamed composite sheet material as claimed in claim 1, wherein, The first foamed film layer and the second foamed film layer are gradient foamed polyethylene layers.

4. The novel eco-friendly impact resistant double layered foamed composite sheet material as claimed in claim 1, wherein, The intermediate layer is a high-density polyethylene layer.

5. The novel eco-friendly impact resistant double layered foamed composite sheet material as claimed in claim 1, wherein, The first adhesive layer, the second adhesive layer, the third adhesive layer, and the fourth adhesive layer are low-density polyethylene layers.

6. A novel eco-friendly impact resistant double foamed composite sheet material, characterized by, From the outside to the inside, the layers consist of an outer printed layer, a first foamed film layer, an intermediate layer, a second foamed film layer, a barrier layer, and an inner layer. A first adhesive layer is disposed between the outer printed layer and the first foamed film layer, a second adhesive layer is disposed between the first foamed film layer and the intermediate layer, a third adhesive layer is disposed between the intermediate layer and the second foamed film layer, a fifth adhesive layer is disposed between the second foamed film layer and the barrier layer, and a sixth adhesive layer is disposed between the barrier layer and the inner layer.

7. The novel eco-friendly impact resistant double layered foamed composite sheet as claimed in claim 6, wherein, The first adhesive layer, the second adhesive layer, and the third adhesive layer are polyurethane layers.

8. The novel environmentally friendly and impact-resistant double-layer foamed composite sheet according to claim 6, characterized in that, The barrier layer is an ethylene-vinyl alcohol copolymer layer.

9. The novel eco-friendly impact resistant double layered foamed composite sheet as claimed in claim 6, wherein, The fifth and sixth adhesive layers are low-density polyethylene layers.

10. A new and improved impact resistant double layer foamed composite packaging hose characterized in that, It includes a cap and a body, wherein the body is made of a novel environmentally friendly and impact-resistant double-layer foamed composite sheet according to any one of claims 1 to 9.

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