A laser-perforated deoxidizer packaging material

Abstract

This utility model belongs to the field of deoxidizers, and in particular to a laser-perforated deoxidizer packaging material. It includes an outer film of the deoxidizer packaging material and an inner film of the deoxidizer packaging material bonded to the inner side of the outer film via a dot-matrix adhesive. The laser-perforated deoxidizer packaging material further includes: an outer film of the deoxidizer packaging material, comprising an outer barrier film, a laser-perforated functional layer, an oil-resistant, waterproof, and breathable layer, and a high-strength support layer. These layers are bonded sequentially from the outside in. In this utility model, the hydrophobic polyurethane nanofiber membrane can physically block ultrafine powder, the multi-layer structure can prevent liquid phase penetration, the tear-resistant reinforcing ring can increase the tear resistance of the packaging bag, effectively coping with puncture and compression stress during transportation, and the high-strength support layer imparts high modulus and low-temperature toughness to the material.

Description

Technical Field

[0001] This utility model relates to the field of deoxidizer technology, and in particular to a deoxidizer packaging material with laser perforation. Background Technology

[0002] During the production and use of deoxidizers, packaging materials are required for packaging. In the prior art, Chinese patent document with application number 202221030431.9 discloses a deoxidizer packaging material.

[0003] However, due to structural defects, the above technical solution still has the following problems:

[0004] 1. Although ordinary PE layers have basic leak-proof function, they are prone to heat-sealing weld cracking in high oil or strong acid and alkali environments, leading to deoxidizer powder leakage.

[0005] 2. After being made into oxygen absorber packaging bags, the oxygen absorber packaging bags are easily torn open by external force, causing the entire oxygen absorber packaging bag to become ineffective. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the risk of powder leakage and the ease with which powder leakage bags can be torn open, by proposing a laser-perforated deoxidizer packaging material.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A laser-perforated oxygen absorber packaging material includes an outer film and an inner film bonded to the inner side of the outer film with a dot-matrix adhesive. The laser-perforated oxygen absorber packaging material further includes:

[0009] The outer film of the oxygen absorber packaging material includes an outer barrier film, a laser-perforated functional layer, an oil-resistant, waterproof, and breathable layer, and a high-strength support layer. The outer barrier film, the laser-perforated functional layer, the oil-resistant, waterproof, and breathable layer, and the high-strength support layer are bonded together layer by layer from the outside to the inside.

[0010] The inner film of the deoxidizer packaging material includes a hydrophobic polyurethane nanofiber membrane, a modified fumed silica composite nonwoven fabric, a biodegradable PLA membrane, and a low-temperature heat-sealing EVA coating. The hydrophobic polyurethane nanofiber membrane, the modified fumed silica composite nonwoven fabric, the biodegradable PLA membrane, and the low-temperature heat-sealing EVA coating are bonded layer by layer from the outside to the inside.

[0011] The tear-resistant reinforcing ring is bonded between the outer film and the inner film of the oxygen absorber packaging material. The hydrophobic polyurethane nanofiber membrane can physically block ultrafine powder, and the modified fumed silica composite nonwoven fabric uses a three-dimensional network structure to adsorb oil and prevent liquid phase penetration. The tear-resistant reinforcing ring can increase the tear resistance of the packaging bag and effectively cope with puncture and compression stress during transportation. The high-strength support layer gives the material high modulus and low-temperature toughness.

[0012] As a preferred embodiment of this utility model, the outer barrier film is composed of graphene-modified polyethylene terephthalate, and the thickness of the graphene-modified polyethylene terephthalate is 8-10 μm.

[0013] Furthermore, the outer barrier membrane can block the intrusion of environmental moisture, oils, and large particulate pollutants, while graphene enhances the blocking of ultraviolet rays and protects the stability of the internal functional layers.

[0014] As a preferred embodiment of this utility model, the laser drilling functional layer is made of polylactic acid-based nanocomposite material with a thickness of 20-25 μm and a laser micropore array on the surface of the polylactic acid-based nanocomposite material.

[0015] Furthermore, the laser-drilled functional layer can provide breathability, facilitating the function of the deoxidizer.

[0016] As a preferred embodiment of this utility model, the laser micro-hole array has a gradient density distribution, with a hole density of 70-80 holes / cm² in the central region and a hole density of 25-30 holes / cm² in the edge region. The micro-holes in the laser drilling functional layer are conical through holes, with an outer opening diameter of 10-20 μm and an inner opening diameter of 5-10 μm.

[0017] Furthermore, the surface is provided with gradient conical micropores. The high-density pores in the central area accelerate oxygen permeation, while the low-density pores in the edge area prevent excessive oxygen permeation. The conical pore design allows oxygen to permeate inward through the micropores, and the conical structure prevents backflow of internal deoxidizer powder. The gradient distribution enables differentiated oxygen control for workpieces in the packaging area.

[0018] As a preferred embodiment of this utility model, the oil-resistant, waterproof, and breathable layer is a polyacrylate composite paper with a basis weight of 15-25 g / m², and the high-strength support layer is a nano-mica-reinforced polylactic acid film with a thickness of 5-10 μm.

[0019] Furthermore, the oil-resistant, waterproof, and breathable layer is made of polyacrylate composite paper, which allows gas to continue to permeate through micropores, blocks the intrusion of oily substances and liquid water, and protects the activity of the internal deoxidizer.

[0020] As a preferred embodiment of this utility model, the hydrophobic polyurethane nanofiber membrane has a pore size ≤ 0.5 μm, and the modified fumed silica composite nonwoven fabric forms a three-dimensional mesh leak-proof structure.

[0021] Furthermore, the structure of the hydrophobic polyurethane nanofiber membrane can prevent excessive moisture from entering, thus ensuring the effectiveness of the hydrophobic polyurethane nanofiber membrane.

[0022] As a preferred embodiment of this utility model, the tear-resistant reinforcing ring is composed of a carbon fiber mesh and a metallocene linear low-density polyethylene composite. The mesh density of the carbon fiber mesh is 300 mesh, and the heat-sealing strength of the low-temperature heat-sealing EVA coating is ≥1.5N / 15mm.

[0023] Furthermore, the tear-resistant reinforcement ring is made of carbon fiber mesh and metallocene polyethylene composite. The carbon fiber mesh can disperse tearing stress and prevent cracking at the seal, while the metallocene polyethylene provides flexible cushioning. Beneficial effects

[0024] 1. By combining an outer barrier membrane, a laser-drilled functional layer, an oil-resistant, waterproof, and breathable layer, a high-strength support layer, a hydrophobic polyurethane nanofiber membrane, a modified fumed silica composite nonwoven fabric, a biodegradable PLA membrane, and a low-temperature heat-sealing EVA coating, the risk of powder leakage can be reduced.

[0025] 2. By utilizing a multi-layered structure and tear-resistant reinforcing rings, a protective structure can be formed on the outside of the packaging bag to prevent it from being torn.

[0026] In this invention: the hydrophobic polyurethane nanofiber membrane can physically block ultrafine powder; the modified fumed silica composite nonwoven fabric uses a three-dimensional network structure to adsorb oil and prevent liquid phase penetration; the tear-resistant reinforcing ring can increase the tear resistance of the packaging bag and effectively cope with puncture and compression stress during transportation; and the high-strength support layer gives the material high modulus and low-temperature toughness. Attached Figure Description

[0027] Figure 1 This is a three-dimensional view of a laser-perforated deoxidizer packaging material proposed in this utility model;

[0028] Figure 2 This utility model discloses a laser-perforated deoxidizer packaging material with a layered outer film.

[0029] Figure 3 This utility model proposes a laser-perforated deoxidizer packaging material with layered inner film diagram;

[0030] Figure 4 This invention presents a micro-perforation diagram of the laser-perforated functional layer of a deoxidizer packaging material.

[0031] In the diagram: 1. Outer film of oxygen absorber packaging material; 2. Inner film of oxygen absorber packaging material; 3. Outer barrier film; 4. Laser-perforated functional layer; 5. Oil-resistant, waterproof, and breathable layer; 6. High-strength support layer; 7. Hydrophobic polyurethane nanofiber membrane; 8. Modified fumed silica composite nonwoven fabric; 9. Biodegradable PLA film; 10. Low-temperature heat-sealing EVA coating; 11. Tear-resistant reinforcing ring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0033] Reference Figure 1-4 A laser-perforated oxygen absorber packaging material includes an outer film 1 and an inner film 2 bonded to the inner side of the outer film 1 by a dot-matrix adhesive. The laser-perforated oxygen absorber packaging material further includes:

[0034] The outer film 1 of the deoxidizer packaging material includes an outer barrier film 3, a laser-perforated functional layer 4, an oil-resistant, waterproof, and breathable layer 5, and a high-strength support layer 6. The outer barrier film 3, the laser-perforated functional layer 4, the oil-resistant, waterproof, and breathable layer 5, and the high-strength support layer 6 are bonded layer by layer from the outside to the inside. The inner side of the outer barrier film 3 is bonded to the surface of the laser-perforated functional layer 4, the inner side of the laser-perforated functional layer 4 is bonded to the surface of the oil-resistant, waterproof, and breathable layer 5, and the inner side of the oil-resistant, waterproof, and breathable layer 5 is bonded to the surface of the high-strength support layer 6.

[0035] The deoxidizer packaging material inner film 2 includes a hydrophobic polyurethane nanofiber membrane 7, a modified fumed silica composite nonwoven fabric 8, a biodegradable PLA membrane 9, and a low-temperature heat-sealing EVA coating 10. The hydrophobic polyurethane nanofiber membrane 7, the modified fumed silica composite nonwoven fabric 8, the biodegradable PLA membrane 9, and the low-temperature heat-sealing EVA coating 10 are bonded layer by layer from the outside to the inside. The high-strength support layer 6 is bonded to the hydrophobic polyurethane nanofiber membrane 7 by a dot matrix adhesive. The inner side of the hydrophobic polyurethane nanofiber membrane 7 is bonded to the surface of the modified fumed silica composite nonwoven fabric 8. The inner side of the modified fumed silica composite nonwoven fabric 8 is bonded to the surface of the biodegradable PLA membrane 9. The low-temperature heat-sealing EVA coating 10 is applied to the inner side of the biodegradable PLA membrane 9.

[0036] Tear-resistant reinforcing ring 11 is bonded between the inner side of the outer film 1 and the inner film 2 of the deoxidizer packaging material. The hydrophobic polyurethane nanofiber membrane 7 can physically block ultrafine powder. The modified fumed silica composite nonwoven fabric 8 uses a three-dimensional network structure to adsorb oil and prevent liquid phase penetration. The tear-resistant reinforcing ring 11 can increase the tear resistance of the packaging bag and effectively cope with puncture and extrusion stress during transportation. The high-strength support layer gives the material high modulus and low-temperature toughness.

[0037] To protect the packaging bag, such as Figure 2 As shown, the outer barrier membrane 3 is composed of graphene-modified polyethylene terephthalate, and the thickness of the graphene-modified polyethylene terephthalate is 8-10 μm. The outer barrier membrane 3 can block the intrusion of environmental water vapor, oil and large particulate pollutants. At the same time, graphene enhances the blocking of ultraviolet rays and protects the stability of the internal functional layer.

[0038] To facilitate air passage, such as Figure 2 As shown, the laser-drilled functional layer 4 is made of polylactic acid-based nanocomposite material with a thickness of 20-25 μm. The surface of the polylactic acid-based nanocomposite material is provided with a laser micropore array. The laser-drilled functional layer 4 can achieve the effect of air permeability and facilitate the function of deoxidizer.

[0039] To adjust the oxygen throughput, such as Figure 4 As shown, the laser micropore array exhibits a gradient density distribution, with a pore density of 70-80 pores / cm² in the central region and 25-30 pores / cm² in the edge region. The micropores in the laser drilling functional layer 4 are conical through-holes, with an outer opening diameter of 10-20 μm and an inner opening diameter of 5-10 μm. The surface is provided with gradient conical micropores. The high-density pores in the central region accelerate oxygen permeation, while the low-density pores in the edge region prevent excessive oxygen permeation. The conical pore design allows oxygen to permeate inward through the micropores, and the conical structure prevents backflow of internal deoxidizer powder. The gradient distribution enables differentiated oxygen control for workpieces in the packaging area.

[0040] To prevent the intrusion of oily substances and liquid water, such as Figure 2 As shown, the oil-resistant, waterproof, and breathable layer 5 is made of polyacrylate composite paper with a basis weight of 15-25 g / m². The high-strength support layer 6 is made of nano-mica-reinforced polylactic acid film with a thickness of 5-10 μm. The oil-resistant, waterproof, and breathable layer 5 is made of polyacrylate composite paper, which allows gas to continue to permeate through micropores, blocks the intrusion of oily substances and liquid water, and protects the activity of the internal deoxidizer.

[0041] To prevent moisture from seeping in, such as Figure 3As shown, the pore size of the hydrophobic polyurethane nanofiber membrane 7 is ≤0.5μm, and the modified fumed silica composite nonwoven fabric 8 forms a three-dimensional mesh leak-proof structure. The structure of the hydrophobic polyurethane nanofiber membrane 7 can prevent excessive moisture from entering and ensure the effectiveness of the hydrophobic polyurethane nanofiber membrane 7.

[0042] To prevent tearing of the packaging bag, such as Figure 2 As shown, the tear-resistant reinforcing ring 11 is made of carbon fiber mesh and metallocene linear low-density polyethylene. The mesh density of the carbon fiber mesh is 300 mesh, and the heat-sealing strength of the low-temperature heat-sealing EVA coating 10 is ≥1.5N / 15mm. The material of the tear-resistant reinforcing ring 11 is carbon fiber mesh + metallocene polyethylene composite. The carbon fiber mesh can disperse tearing stress and prevent cracking at the seal, while the metallocene polyethylene provides flexible cushioning.

[0043] The working principle of this invention is as follows: The outer barrier membrane 3 is made of graphene-modified polyester. As the outermost layer, it blocks the intrusion of environmental moisture, grease, and large particulate pollutants. Simultaneously, graphene enhances the blocking of ultraviolet rays, protecting the stability of the inner functional layers. The laser-drilled functional layer 4 is made of polylactic acid-based nanocomposite material with gradient conical micropores on its surface. The high-density pores in the central area accelerate oxygen permeation, while the low-density pores in the edge area prevent excessive oxygen permeation. The conical pore design allows oxygen to permeate inward through the micropores, and the conical structure prevents backflow of the internal deoxidizer powder. The gradient distribution achieves encapsulation... The oxygen control system for regionally differentiated workpieces is designed with an oil-resistant, waterproof, and breathable layer 5 made of polyacrylate composite paper. This allows gas to continue permeating through micropores while blocking the intrusion of oily substances and liquid water, protecting the activity of the internal deoxidizer. The high-strength support layer 6 is made of nano-mica-reinforced polylactic acid film. The mica nanosheets enhance the tensile strength of the film, providing mechanical support for the outer membrane 1 of the deoxidizer packaging material and preventing deformation of the laser micropores. The hydrophobic polyurethane nanofiber membrane 7 intercepts ultrafine powder in the deoxidizer, and its hydrophobic surface prevents water vapor condensation, maintaining the drying activity of the deoxidizer. Modified fumed silica is also included. The composite nonwoven fabric 8, with fumed silica filling the fiber gaps to form a three-dimensional mesh-like particle-locking layer, can further capture extremely fine powders that penetrate the nanofiber membrane. The highly tortuous channels increase powder escape resistance. The biodegradable PLA film 9 is made of polylactic acid film, providing a biodegradable mechanical support layer. Together with the EVA coating, it achieves low-temperature heat sealing. The low-temperature heat-sealing EVA coating 10 prevents high-temperature damage to the active ingredients of the deoxidizer, ensuring the integrity of the packaging bag's edge seal. The tear-resistant reinforcing ring 11 is made of carbon fiber mesh + metallocene polyethylene composite, which can... Carbon fiber mesh disperses tearing stress and prevents cracking at the seal. Metallocene polyethylene provides flexible buffering. The oxygen entry path is that ambient oxygen penetrates the outer barrier membrane 3, and the permeation rate is regulated by the gradient conical micropores 4. It passes through the breathable layer 5, through the gaps in the support layer 6, through the gaps in the lattice adhesive layer, and into the inner hydrophobic nanofiber membrane 7. It diffuses to the deoxidizer reaction zone. The leakage prevention path is that the deoxidizer powder is intercepted by the nanofiber membrane 7. The residual particles are trapped in the silica three-dimensional mesh 8. The conical micropores 4, with their small inner and large outer structure, physically block backflow and are ultimately locked inside the packaging.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A laser-drilled oxygen absorber packaging material, comprising an outer film (1) and an inner film (2) of the outer film (1) bonded to its inner side by a dot-matrix adhesive, characterized in that, The laser-drilled deoxidizer packaging material also includes: The outer film of the deoxidizer packaging material (1) includes an outer barrier film (3), a laser-perforated functional layer (4), an oil-resistant, waterproof and breathable layer (5) and a high-strength support layer (6). The outer barrier film (3), the laser-perforated functional layer (4), the oil-resistant, waterproof and breathable layer (5) and the high-strength support layer (6) are bonded together layer by layer from the outside to the inside. The inner film of the deoxidizer packaging material (2) includes a hydrophobic polyurethane nanofiber membrane (7), a modified fumed silica composite nonwoven fabric (8), a biodegradable PLA membrane (9), and a low-temperature heat-sealing EVA coating (10). The hydrophobic polyurethane nanofiber membrane (7), the modified fumed silica composite nonwoven fabric (8), the biodegradable PLA membrane (9), and the low-temperature heat-sealing EVA coating (10) are bonded layer by layer from the outside to the inside. Tear-resistant reinforcing ring (11) is bonded between the inner side of the outer film (1) of the deoxidizer packaging material and the inner film (2) of the deoxidizer packaging material.

2. The deoxidizer packaging material with laser perforation according to claim 1, characterized in that, The outer barrier membrane (3) is composed of graphene-modified polyethylene terephthalate, and the thickness of the graphene-modified polyethylene terephthalate is 8-10 μm.

3. The deoxidizer packaging material with laser perforation according to claim 1, characterized in that, The laser drilling functional layer (4) is made of polylactic acid-based nanocomposite material with a thickness of 20-25 μm and a laser micropore array on the surface of the polylactic acid-based nanocomposite material.

4. The deoxidizer packaging material with laser perforation according to claim 3, characterized in that, The laser micro-hole array has a gradient density distribution, with a hole density of 70-80 holes / cm² in the central region and 25-30 holes / cm² in the edge region. The micro-holes in the laser drilling functional layer (4) are conical through holes with an outer opening diameter of 10-20 μm and an inner opening diameter of 5-10 μm.

5. The deoxidizer packaging material with laser perforation according to claim 1, characterized in that, The oil-resistant, waterproof, and breathable layer (5) is a polyacrylate composite paper with a basis weight of 15-25 g / m². The high-strength support layer (6) is a nano-mica-reinforced polylactic acid film with a thickness of 5-10 μm.

6. The deoxidizer packaging material with laser perforation according to claim 1, characterized in that, The hydrophobic polyurethane nanofiber membrane (7) has a pore size ≤ 0.5 μm, and the modified fumed silica composite nonwoven fabric (8) forms a three-dimensional mesh leak-proof structure.

7. The deoxidizer packaging material with laser perforation according to claim 1, characterized in that, The tear-resistant reinforcing ring (11) is composed of carbon fiber mesh and metallocene linear low-density polyethylene. The mesh density of the carbon fiber mesh is 300 mesh, and the heat-sealing strength of the low-temperature heat-sealing EVA coating (10) is ≥1.5N / 15mm.

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