A method and material for the elastic packing of aluminium rods against wear

Abstract

The application relates to the technical field of packaging and protection, in particular to an elastic packaging method and material for preventing wear of aluminum rods, which comprises the following steps: mixing polyurethane elastomer, modified epoxy resin and nano-silicon dioxide to prepare a composite base material, optimizing the performance through a plasticizer and a crosslinking agent, and coating the composite base material with polytetrafluoroethylene to obtain an L-shaped sheet. Through material formula optimization and process optimization, the application significantly improves the wear resistance, flexibility and adhesion performance, and reduces the friction coefficient, and is suitable for aluminum rod protection in different scenes. Comparative experiments show that, if the key components are not added or the specific process is not adopted, the performance will be reduced. The application can effectively solve the problems of the existing elastic packaging materials in wear prevention, strength and applicability, and meets the efficient protection requirements of aluminum rods.

Description

Technical Field

[0001] This invention belongs to the field of packaging and protection technology, specifically a method and material for elastic packaging of aluminum rods to prevent wear and tear. Background Technology

[0002] In the industrial packaging sector, aluminum rods, as an important metal material, are prone to wear and tear during transportation and storage due to mutual friction or external impacts, affecting product quality and appearance. To address this issue, the application of flexible packaging materials and technologies has gradually become a research hotspot. However, existing flexible packaging materials still have certain shortcomings in terms of wear resistance, structural design, and applicability, making it difficult to fully meet the special requirements of aluminum rod packaging.

[0003] The aforementioned existing technical solutions do not fully consider the application of elastic materials and the improvement of their wear resistance in the aluminum rod packaging process. In particular, they are insufficient in terms of the structural design and material property optimization of packaging materials, making it difficult to fully meet the high protection requirements of aluminum rods during transportation and storage. Summary of the Invention

[0004] This invention provides a flexible packaging method and material for protecting aluminum rods from wear, aiming to solve the surface wear problem caused by mutual friction or external impact during transportation and storage by optimizing material formulation and structural design. This flexible packaging material not only possesses excellent wear resistance but also good structural strength and applicability. Furthermore, its manufacturing process is simple and low-cost, meeting the need for efficient protection of aluminum rods.

[0005] In a first aspect, the present invention provides an elastic packaging material for abrasion protection of aluminum rods, which mainly comprises the following components by mass percentage: 20% to 40% polyurethane elastomer, 10% to 30% polyolefin elastomer, 5% to 15% nano-silica, 3% to 8% plasticizer, 1% to 5% antioxidant, and the balance being filler. The components are prepared through a specific mixing process and molding technology to form an elastic sheet with a multi-layered composite structure.

[0006] In some embodiments, the polyurethane elastomer serves as a substrate, providing high elasticity and tear resistance; the polyolefin elastomer works synergistically with the polyurethane elastomer to enhance the overall flexibility and impact resistance of the material; the nano-silica is uniformly dispersed in the material matrix, significantly improving the material's abrasion resistance; the plasticizer regulates the material's softness and ductility; the antioxidant prevents aging of the material during long-term use; and the filler reduces production costs and improves the material's processing performance.

[0007] Secondly, the present invention provides a flexible packaging method for preventing wear and tear on aluminum rods, comprising the following steps:

[0008] S10: Cut the above-mentioned elastic packaging material into L-shaped sheets with a width of 50 cm, a long side of 120 cm, and a short side of 80 cm;

[0009] S20: Wrap the cut L-shaped sheet along the length of the aluminum rod to completely cover the surface of the aluminum rod;

[0010] S30: After packaging is completed, a special fixing device is used to fasten the packaged aluminum rod to ensure that the elastic sheet is tightly attached to the surface of the aluminum rod;

[0011] S40: Stacking and transporting packaged aluminum rods, utilizing the cushioning properties of elastic sheets to reduce friction and impact between the aluminum rods.

[0012] The multilayer composite structure of the elastic packaging material according to the present invention includes an outer protective film, an intermediate elastic layer, and an inner contact layer. The outer protective film is made of a blend of polyurethane elastomer and polyolefin elastomer, with a thickness of 0.2 mm to 0.5 mm, for resisting external impacts and scratches; the intermediate elastic layer is made of polyurethane elastomer reinforced with nano-silica, with a thickness of 0.5 mm to 1 mm, for absorbing vibration and dispersing stress; the inner contact layer is made of modified polyolefin elastomer with a low coefficient of friction, with a thickness of 0.1 mm to 0.3 mm, for reducing friction between the aluminum rod and the packaging material.

[0013] Because this flexible packaging material and its application method address the shortcomings of existing technologies through optimized material formulation and structural design, it achieves excellent abrasion resistance, structural strength, and applicability, meeting the high-efficiency protection requirements during the aluminum rod packaging process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the L-shaped sheet of the elastic packaging material for aluminum rod packing and wear prevention according to the present invention;

[0015] Figure 2 This is a schematic diagram of the aluminum rod packing and wear-resistant elastic packaging material of the present invention after packaging. Detailed Implementation

[0016] As described in the background section above, aluminum rods are prone to surface wear during transportation and storage due to mutual friction or external impact. Traditional elastic packaging materials suffer from insufficient wear resistance, limited impact resistance, and high cost. Therefore, this application provides an elastic packaging method and material for protecting aluminum rods from wear, aiming to address the shortcomings of existing technologies by optimizing material formulation and structural design.

[0017] In a first aspect, this application provides an elastic packaging material for abrasion protection when packing aluminum rods. The material comprises the following components by weight percentage: 20% to 40% polyurethane elastomer, 10% to 30% polyolefin elastomer, 5% to 15% nano-silica, 3% to 8% plasticizer, 1% to 5% antioxidant, and the balance being filler. The components are prepared through a specific mixing process and molding technology to form an elastic sheet with a multi-layered composite structure.

[0018] According to this application, polyurethane elastomer, as the base material, provides high elasticity and tear resistance; polyolefin elastomer works synergistically with polyurethane elastomer to enhance the overall flexibility and impact resistance of the material; nano-silica is uniformly dispersed in the material matrix, significantly improving the wear resistance of the material; plasticizer adjusts the softness and ductility of the material; antioxidant prevents aging of the material during long-term use; and filler reduces production costs and improves the processing performance of the material.

[0019] Secondly, this application provides a flexible packaging method for protecting aluminum rods from wear, comprising the following steps: (Refer to...) Figure 1 Cut the aforementioned elastic packaging material into L-shaped sheets with a width of 50 cm, a long side of 120 cm, and a short side of 80 cm; wrap the cut L-shaped sheets along the length of the aluminum rod, completely covering the surface of the aluminum rod; after wrapping, refer to... Figure 2 Specialized fixing devices are used to secure the packaged aluminum rods, ensuring that the elastic sheet adheres tightly to the surface of the aluminum rods. The packaged aluminum rods are then stacked and transported, utilizing the cushioning properties of the elastic sheet to reduce friction and impact between the aluminum rods.

[0020] According to this application, the multi-layer composite structure of the elastic packaging material includes an outer protective film, a middle elastic layer, and an inner contact layer. The outer protective film is made of a blend of polyurethane elastomer and polyolefin elastomer, with a thickness of 0.2 mm to 0.5 mm, and is used to resist external impacts and scratches; the middle elastic layer is made of polyurethane elastomer reinforced with nano-silica, with a thickness of 0.5 mm to 1 mm, and is used to absorb vibrations and disperse stress; the inner contact layer is made of modified polyolefin elastomer with a low coefficient of friction, with a thickness of 0.1 mm to 0.3 mm, and is used to reduce the friction between the aluminum rod and the packaging material.

[0021] Thirdly, this application specifically illustrates the technical features and effects of the elastic packaging material and its application method through six embodiments and six comparative examples.

[0022] Example 1

[0023] An elastic packaging material for abrasion protection of aluminum rods comprises, by weight percentage: 30% polyurethane elastomer, 25% polyolefin elastomer, 10% nano-silica, 5% plasticizer, 3% antioxidant, and 27% filler. The preparation method is as follows: First, the polyurethane elastomer and polyolefin elastomer are added to a twin-screw extruder and melt-blended at 160°C to 180°C to obtain a basic elastomer. Then, nano-silica, plasticizer, and antioxidant are added, and mixing continues at 140°C to 160°C to form a homogeneous mixture. Finally, the filler is added, and granulation is performed at 120°C to 140°C to obtain an elastic masterbatch. The elastic masterbatch is calendered into sheets with a thickness of 1 mm and cut into L-shaped sheets with a width of 50 cm, a long side of 120 cm, and a short side of 80 cm. When this sheet was used for packaging aluminum rods, the test results showed that the material's wear resistance reached more than 1,000 cycles and its impact strength was 20 kJ per square meter.

[0024] Example 2

[0025] A flexible packaging material for abrasion protection of aluminum rods comprises, by weight percentage: 35% polyurethane elastomer, 20% polyolefin elastomer, 12% nano-silica, 6% plasticizer, 2% antioxidant, and 25% filler. The preparation method is similar to Example 1, but the amount of nano-silica is increased to further improve the material's abrasion resistance. Testing showed that the material's abrasion resistance exceeded 1200 cycles, and its impact strength was 22 kJ / m².

[0026] Example 3

[0027] A flexible packaging material for abrasion protection of aluminum rods comprises, by weight percentage: 25% polyurethane elastomer, 28% polyolefin elastomer, 8% nano-silica, 7% plasticizer, 4% antioxidant, and 28% filler. The preparation method is the same as in Example 1, but the ratio of polyurethane elastomer to polyolefin elastomer is adjusted to optimize the material's flexibility and tear resistance. Test results show that the material achieves a flexibility of 500% elongation and a tear strength of 50 Newtons per millimeter.

[0028] Example 4

[0029] A flexible packaging material for abrasion protection of aluminum rods comprises, by weight percentage: 28% polyurethane elastomer, 22% polyolefin elastomer, 15% nano-silica, 4% plasticizer, 3% antioxidant, and 28% filler. The preparation method is similar to Example 1, but the content of nano-silica is increased to further improve the material's hardness and abrasion resistance. Test results show that the material achieves a Shore A hardness of 90 and an abrasion resistance exceeding 1500 cycles.

[0030] Example 5

[0031] A flexible packaging material for abrasion protection of aluminum rods comprises, by weight percentage: 32% polyurethane elastomer, 26% polyolefin elastomer, 10% nano-silica, 5% plasticizer, 2% antioxidant, and 25% filler. The preparation method is the same as in Example 1, but the amounts of plasticizer and antioxidant are optimized to improve the material's processing performance and aging resistance. Test results show that the material's aging resistance remains largely unchanged after 500 hours of ultraviolet irradiation.

[0032] Example 6

[0033] A flexible packaging material for abrasion protection of aluminum rods comprises, by weight percentage: 30% polyurethane elastomer, 24% polyolefin elastomer, 12% nano-silica, 6% plasticizer, 3% antioxidant, and 25% filler. The preparation method is similar to Example 1, but different types of fillers are used to reduce production costs and improve the material's environmental performance. Test results show that the material's cost is reduced by 20%.

[0034] Comparative Example 1

[0035] A conventional elastic packaging material comprises, by weight percentage: 50% polyurethane elastomer, 10% plasticizer, 5% antioxidant, and 35% filler. The preparation method is similar to Example 1, but without the addition of polyolefin elastomer and nano-silica. Test results show that the material's abrasion resistance is only 500 cycles, and its impact strength is 15 kJ / m².

[0036] Comparative Example 2

[0037] A traditional elastic packaging material comprises, by weight percentage: 60% polyolefin elastomer, 10% plasticizer, 5% antioxidant, and 25% filler. The preparation method is similar to Example 1, but without the addition of polyurethane elastomer and nano-silica. Test results show that the material has poor flexibility, with an elongation of only 200%.

[0038] Comparative Example 3

[0039] A conventional elastic packaging material comprises, by weight percentage: 40% polyurethane elastomer, 30% polyolefin elastomer, 10% plasticizer, 5% antioxidant, and 15% filler. The preparation method is similar to Example 1, but without the addition of nano-silica. Test results show that the material's abrasion resistance is only 800 cycles.

[0040] Comparative Example 4

[0041] A traditional elastic packaging material comprises, by weight percentage: 30% polyurethane elastomer, 25% polyolefin elastomer, 15% plasticizer, 5% antioxidant, and 25% filler. The preparation method is similar to Example 1, but the amounts of plasticizer and antioxidant are not optimized. Test results show that the material has poor aging resistance, exhibiting significant aging after 200 hours of ultraviolet irradiation.

[0042] Comparative Example 5

[0043] A conventional elastic packaging material comprises, by weight percentage: 35% polyurethane elastomer, 20% polyolefin elastomer, 10% plasticizer, 5% antioxidant, and 30% filler. The preparation method is similar to Example 1, but the type of filler remains unchanged. Test results show that this material is relatively expensive.

[0044] Comparative Example 6

[0045] A conventional elastic packaging material comprises, by weight percentage: 25% polyurethane elastomer, 25% polyolefin elastomer, 10% plasticizer, 5% antioxidant, and 35% filler. The preparation method is similar to that of Example 1, but the material's thickness and structural design are not optimized. Test results show that the material's impact strength is only 10 kJ / m².

[0046] The following are comparative experimental data from the examples and comparative cases:

[0047] Experimental indicators Abrasion resistance (times) Impact resistance (kJ / m²) Flexibility (elongation %) Cost (relative value) Example 1 1000 20 400 1.0 Example 2 1200 22 450 1.1 Example 3 800 18 500 1.0 Example 4 1500 25 480 1.2 Example 5 1100 21 420 1.0 Example 6 1000 19 410 0.8 Comparative Example 1 500 15 300 1.5 Comparative Example 2 600 12 200 1.4 Comparative Example 3 800 16 350 1.3 Comparative Example 4 700 14 280 1.4 Comparative Example 5 550 13 250 1.6 Comparative Example 6 400 10 180 1.7

[0048] As can be seen from the data in the table, the embodiments show significant advantages over the comparative examples in terms of wear resistance, impact strength, and flexibility. At the same time, some embodiments also achieve cost reduction.

Claims

1. A flexible packaging material for protecting aluminum rods from wear, characterized in that, Composed of the following components by mass percentage: The composition includes 20% to 40% polyurethane elastomer, 10% to 30% polyolefin elastomer, 5% to 15% nano silica, 3% to 8% plasticizer, 1% to 5% antioxidant, and the balance being filler. The elastic packaging material has a multi-layer composite structure, including an outer protective film, a middle elastic layer, and an inner contact layer; The outer protective film is made of a blend of polyurethane elastomer and polyolefin elastomer, with a thickness of 0.2 mm to 0.5 mm; The intermediate elastic layer is made of polyurethane elastomer reinforced with nano-silica, with a thickness of 0.5 mm to 1 mm; The inner contact layer is made of a modified polyolefin elastomer with a low coefficient of friction and has a thickness of 0.1 mm to 0.3 mm.

2. The elastic packaging material according to claim 1, characterized in that, The particle size of the nano-silica is 10 nanometers to 50 nanometers.

3. The elastic packaging material according to claim 1, characterized in that, The filler includes at least one of calcium carbonate, talc, or wollastonite.

4. The elastic packaging material according to claim 1, characterized in that, The plasticizer is a phthalate plasticizer or epoxidized soybean oil.

5. The elastic packaging material according to claim 1, characterized in that, The antioxidant is a hindered phenolic antioxidant or a phosphite antioxidant.

6. A method for elastic packaging to prevent wear and tear on aluminum rods, characterized in that, Includes the following steps: S10: Cut the elastic packaging material into L-shaped sheets with a width of 50 cm, a long side of 120 cm, and a short side of 80 cm; S20: Wrap the cut L-shaped sheet along the length of the aluminum rod to completely cover the surface of the aluminum rod; S30: After packaging is completed, a special fixing device is used to fasten the packaged aluminum rod to ensure that the elastic sheet is tightly attached to the surface of the aluminum rod; S40: Stacking and transporting packaged aluminum rods.

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