Packaging material for electronic cigarette and preparation method thereof

Abstract

The invention belongs to the technical field of packaging materials, and relates to a packaging material for an electronic cigarette and a preparation method thereof, the packaging material for the electronic cigarette is composed of a polytrifluorochloroethylene layer, a polyurethane adhesive layer and a polyvinyl chloride layer which are stacked; wherein an adhesive adopted by the polyurethane adhesive layer is a three-component polyurethane adhesive. The preparation method at least comprises the following steps: compounding the polytrifluorochloroethylene layer and the polyvinyl chloride layer through a three-component polyurethane adhesive by adopting a dry compounding process, and drying and curing to obtain the packaging material for the electronic cigarette. The packaging material for the electronic cigarette can effectively block permeation of external water vapor and oxygen, meanwhile, the storage and transportation safety of the electronic cigarette in a low-temperature environment is improved, and the specific fragrance of the electronic cigarette is effectively kept.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging materials and relates to a packaging material for electronic cigarettes, and in particular to a packaging material for electronic cigarettes and a preparation method thereof. Background Art

[0002] With the rapid development of the economy and society, e-cigarettes, as an emerging consumer product, have gradually become the preferred choice for many people to socialize and relieve stress. E-cigarettes not only offer an alternative to traditional cigarettes but are also widely popular for their diverse flavors and relatively low levels of harmful substances. However, e-cigarettes are particularly sensitive to environmental conditions, particularly moisture. Once exposed to moisture, the composition of the e-cigarette liquid changes, resulting in a poor taste, reduced vapor volume, and even the production of harmful substances, seriously affecting product quality and user experience.

[0003] Currently, e-cigarette packaging primarily uses standard polyvinyl chloride (PVC) or polyvinylidene chloride (PVDC) materials. While these materials can meet basic packaging requirements to a certain extent, they present numerous challenges in practical applications. For example, standard PVC and PVDC have poor water vapor barrier properties and cannot effectively block the penetration of external moisture. Furthermore, these materials can become brittle at low temperatures, causing the packaging to rupture.

[0004] Furthermore, the flavor of e-cigarettes is one of the key factors that attract consumers. Many e-cigarettes contain flavoring molecules such as esters and aldehydes. However, existing packaging materials cannot retain these flavor molecules for long periods of time, causing the flavor of e-cigarettes to gradually disappear during storage.

[0005] It can be seen that how to provide a packaging material for electronic cigarettes that effectively blocks the penetration of external water vapor and oxygen, while improving the storage and transportation safety of electronic cigarettes in low-temperature environments and effectively maintaining the unique flavor of electronic cigarettes has become an urgent problem to be solved by technical personnel in this field. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an electronic cigarette packaging material and a preparation method thereof. The electronic cigarette packaging material can effectively block the penetration of external water vapor and oxygen, while improving the storage and transportation safety of electronic cigarettes in low-temperature environments and effectively maintaining the unique flavor of electronic cigarettes.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a packaging material for an electronic cigarette, wherein the packaging material for an electronic cigarette is composed of a polytrifluorochloroethylene layer, a polyurethane adhesive layer, and a polyvinyl chloride layer that are stacked.

[0009] Wherein, the adhesive used in the polyurethane adhesive layer is a three-component polyurethane adhesive.

[0010] The electronic cigarette packaging material provided by the present invention uses a polytrifluoroethylene layer as a high barrier layer. Due to its good water vapor barrier properties, transparency, resistance to low-temperature embrittlement and chemical stability, it can effectively block the penetration of external water vapor and still maintain good performance at low temperatures. At the same time, a polyvinyl chloride layer is used as a base material layer. Due to its good processing performance and certain barrier properties, it can provide the packaging material with certain mechanical strength and forming performance.

[0011] In addition, the present invention uses a three-component polyurethane adhesive to composite the polytrifluorochloroethylene layer and the polyvinyl chloride layer. Because of its good bonding performance and low-temperature resistance, it can ensure close adhesion between the layers, thereby improving the overall performance of the packaging material.

[0012] It can be seen that the "polytrifluorochloroethylene layer-polyurethane adhesive layer-polyvinyl chloride layer" sandwich structure provided by the present invention can effectively reduce the penetration of water vapor and oxygen outside the packaging material into the internal space of the packaging, and can also effectively resist the brittleness of the product at low temperatures and prevent the packaging from breaking. At the same time, it can maintain the electronic cigarette fragrance molecules in the packaging space for a long time and prevent the loss of fragrance molecules, thereby enhancing the product's attractiveness and user experience.

[0013] Preferably, the three-component polyurethane adhesive includes adhesive LA051, adhesive LA055, adhesive LA031 and an organic solvent.

[0014] Preferably, the organic solvent comprises ethyl acetate.

[0015] Preferably, the mass ratio of the adhesive LA051, the adhesive LA055, the adhesive LA031 and the organic solvent is (50-55):(22-23):(5-8):(50-60).

[0016] Preferably, the thickness of the polychlorotrifluoroethylene layer is 15 μm-100 μm.

[0017] Preferably, the thickness of the polyvinyl chloride layer is 100 μm-250 μm.

[0018] Preferably, the thickness ratio of the polytrifluorochloroethylene layer to the polyvinyl chloride layer is (0.06-0.4):1.

[0019] In a second aspect, the present invention provides a method for preparing the electronic cigarette packaging material as described in the first aspect, the preparation method at least comprising: using a dry composite process to composite a polytrifluorochloroethylene layer and a polyvinyl chloride layer together using a three-component polyurethane adhesive, and then drying and aging to obtain the electronic cigarette packaging material.

[0020] Preferably, the dry lamination process comprises: using a BOBST dry laminating machine to simultaneously unwind the polytrifluorochloroethylene layer and the polyvinyl chloride layer, applying a three-component polyurethane adhesive after online corona treatment, laminating and winding.

[0021] Preferably, the unwinding tension of the polytrifluorochloroethylene layer is 40N-90N, and the unwinding tension of the polyvinyl chloride layer is 200N-320N.

[0022] Preferably, the speed of the unwinding operation is 30m / min-40m / min.

[0023] Preferably, the online corona power of the polytrifluorochloroethylene layer is 1.2kW-1.3kW, and the online corona power of the polyvinyl chloride layer is 5kW-5.1kW.

[0024] Preferably, the coating tension of the three-component polyurethane adhesive is 100N-180N, and the glue amount is 3g / m 2 -3.5g / m 2 , the adhesive surface is located on the corona surface of the polyvinyl chloride layer.

[0025] Preferably, the lamination pressure is 0.35 MPa-0.5 MPa, and the temperature is 55° C.-65° C.

[0026] Preferably, the winding tension is 200N-300N, and the taper is 40%-46.3%.

[0027] Preferably, the drying is a three-stage drying, and the temperature of each drying stage increases successively.

[0028] Preferably, the drying temperature is 60°C-85°C.

[0029] Preferably, the aging temperature is 20°C-50°C, and the aging time is 48h-72h.

[0030] Preferably, the electronic cigarette packaging material is cut after being matured.

[0031] Preferably, the slitting process uses a disc blade, the acceleration time is 20s-30s, and the deceleration time is 15s-20s.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The electronic cigarette packaging material provided by the present invention adopts a polytrifluoroethylene layer as a high barrier layer. Because it has good water vapor barrier properties, transparency, resistance to low-temperature embrittlement and chemical stability, it can effectively block the penetration of external water vapor and can still maintain good performance at low temperatures. At the same time, a polyvinyl chloride layer is used as a base material layer. Because it has good processing performance and certain barrier properties, it can provide certain mechanical strength and forming performance for the packaging material.

[0034] (2) The present invention uses a three-component polyurethane adhesive to composite the polytrifluorochloroethylene layer and the polyvinyl chloride layer. Because it has good bonding properties and low-temperature resistance, it can ensure that the layers are tightly fitted together, thereby improving the overall performance of the packaging material.

[0035] (3) The sandwich structure of "polytrifluorochloroethylene layer-polyurethane adhesive layer-polyvinyl chloride layer" provided by the present invention can effectively reduce the penetration of water vapor and oxygen from the outside of the packaging material into the internal space of the packaging, and can also effectively resist the brittleness of the product at low temperatures and prevent the packaging from breaking. At the same time, it can maintain the electronic cigarette fragrance molecules in the packaging space for a long time and prevent the loss of fragrance molecules, thereby enhancing the product's attractiveness and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the packaging material for electronic cigarettes provided by the present invention.

[0037] Among them: 1-polytrifluorochloroethylene layer; 2-polyurethane adhesive layer; 3-polyvinyl chloride layer. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0039] A certain embodiment of the present invention provides a packaging material for an electronic cigarette, wherein the packaging material for an electronic cigarette is composed of a polytrifluorochloroethylene layer, a polyurethane adhesive layer, and a polyvinyl chloride layer that are stacked.

[0040] Wherein, the adhesive used in the polyurethane adhesive layer is a three-component polyurethane adhesive.

[0041] The electronic cigarette packaging material provided by the present invention uses a polytrifluoroethylene layer as a high barrier layer. Due to its good water vapor barrier properties, transparency, resistance to low-temperature embrittlement and chemical stability, it can effectively block the penetration of external water vapor and still maintain good performance at low temperatures. At the same time, a polyvinyl chloride layer is used as a base material layer. Due to its good processing performance and certain barrier properties, it can provide the packaging material with certain mechanical strength and forming performance.

[0042] In addition, the present invention uses a three-component polyurethane adhesive to composite the polytrifluorochloroethylene layer and the polyvinyl chloride layer. Because of its good bonding performance and low-temperature resistance, it can ensure close adhesion between the layers, thereby improving the overall performance of the packaging material.

[0043] It can be seen that the "polytrifluorochloroethylene layer-polyurethane adhesive layer-polyvinyl chloride layer" sandwich structure provided by the present invention can effectively reduce the penetration of water vapor and oxygen outside the packaging material into the internal space of the packaging, and can also effectively resist the brittleness of the product at low temperatures and prevent the packaging from breaking. At the same time, it can maintain the electronic cigarette fragrance molecules in the packaging space for a long time and prevent the loss of fragrance molecules, thereby enhancing the product's attractiveness and user experience.

[0044] In certain embodiments, the three-component polyurethane adhesive includes adhesive LA051, adhesive LA055, adhesive LA031, and an organic solvent.

[0045] In the present invention, the adhesive LA051 specifically refers to Dow ADCOTE TM 502S adhesive; the adhesive LA055 specifically refers to Mitsui TAKELAC PP-5430 adhesive, the main component of which is a polyester polyol mixture; the adhesive LA031 specifically refers to Mitsui TAKENATE I-3000 adhesive, the main component of which is aromatic isocyanate salt.

[0046] In the three-component polyurethane adhesive provided by the present invention, adhesives LA051, LA055, and LA031 undergo a cross-linking reaction to form a polymer network structure. The cured adhesive layer has extremely high bonding strength. Moreover, the bonding strength of this three-component adhesive is greater than that of single-component and two-component adhesives, fully meeting the high bonding strength requirements of electronic cigarette packaging materials.

[0047] In addition, the performance of the above-mentioned three-component polyurethane adhesive in low-temperature environments is significantly better than that of single-component and two-component adhesives. Its shear strength and fatigue resistance under low-temperature conditions are particularly outstanding, which can effectively prevent packaging materials from becoming brittle or cracking at low temperatures.

[0048] Furthermore, among the three-component polyurethane adhesives used in the present invention, adhesive LA051 can partially replace adhesive LA055. The reason is that: adhesive LA055 contains silane coupling agent, and the product produced is prone to excessive methanol residual. The peel strength of the product produced using the three-component polyurethane adhesive is higher than the peel strength of the two-component glue.

[0049] In some embodiments, the organic solvent includes ethyl acetate, and the type thereof can be selected as solvent 113.

[0050] In certain embodiments, the mass ratio of the adhesive LA051, the adhesive LA055, the adhesive LA031 and the organic solvent is (50-55):(22-23):(5-8):(50-60), for example, it can be 50:22:5:50, 51:22:5.5:52, 52:22:6:54, 53:23:6.5:56, 54:23:7:58 or 55:23:8:60, and more preferably 54:22.5:6:(50-60), but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0051] In some embodiments, the thickness of the polytrifluorochloroethylene layer is 15 μm-100 μm, for example, it can be 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm or 100 μm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0052] In some embodiments, the thickness of the polyvinyl chloride layer is 100μm-250μm, for example, it can be 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm or 250μm, but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0053] In some embodiments, the thickness ratio of the polytrifluorochloroethylene layer to the polyvinyl chloride layer is (0.06-0.4):1, for example, it can be 0.06:1, 0.08:1, 0.1:1, 0.15:1, 0.2:1, 0.25:1, 0.3:1, 0.35:1 or 0.4:1, but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0054] An embodiment of the present invention further provides a method for preparing the electronic cigarette packaging material described in any of the above embodiments, the preparation method at least comprising: using a dry composite process to composite a polytrifluorochloroethylene layer and a polyvinyl chloride layer together using a three-component polyurethane adhesive, and then drying and aging to obtain the electronic cigarette packaging material.

[0055] In certain embodiments, the dry lamination process includes: using a BOBST dry laminating machine to simultaneously unwind the polytrifluorochloroethylene layer and the polyvinyl chloride layer, applying a three-component polyurethane adhesive after online corona treatment, laminating, and winding.

[0056] In some embodiments, the unwinding tension of the polytrifluorochloroethylene layer is 40N-90N, for example, it can be 40N, 45N, 50N, 55N, 60N, 65N, 70N, 75N, 80N, 85N or 90N, and the unwinding tension of the polyvinyl chloride layer is 200N-320N, for example, it can be 200N, 210N, 220N, 230N, 240N, 250N, 260N, 270N, 280N, 290N, 300N, 310N or 320N, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0057] In some embodiments, the speed of the unwinding operation is 30m / min-40m / min, for example, it can be 30m / min, 31m / min, 32m / min, 33m / min, 34m / min, 35m / min, 36m / min, 37m / min, 38m / min, 39m / min or 40m / min, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0058] In certain embodiments, the online corona power of the polytrifluorochloroethylene layer is 1.2kW-1.3kW, for example, it can be 1.2kW, 1.22kW, 1.24kW, 1.26kW, 1.28kW or 1.3kW, and the online corona power of the polyvinyl chloride layer is 5kW-5.1kW, for example, it can be 5kW, 5.02kW, 5.04kW, 5.06kW, 5.08kW or 5.1kW, but is not limited to the listed values, and other unlisted values ​​within this numerical range are equally applicable.

[0059] In some embodiments, the coating tension of the three-component polyurethane adhesive is 100N-180N, for example, 100N, 110N, 120N, 130N, 140N, 150N, 160N, 170N or 180N, and the glue amount is 3g / m 2 -3.5g / m 2 , for example, it can be 3g / m 2 , 3.1g / m 2 3.2g / m 2 3.3g / m 2 , 3.4g / m 2 or 3.5g / m 2 , the adhesive surface is located on the corona surface of the polyvinyl chloride layer.

[0060] In some embodiments, the lamination pressure is 0.35MPa-0.5MPa, for example, it can be 0.35MPa, 0.36MPa, 0.37MPa, 0.38MPa, 0.39MPa, 0.4MPa, 0.41MPa, 0.42MPa, 0.43MPa, 0.44MPa, 0.45MPa, 0.46MPa, 0.47MPa, 0.48MPa, 0.49MPa or 0.5MPa, and the temperature is 55℃-65℃, for example, it can be 55℃, 56℃, 57℃, 58℃, 59℃, 60℃, 61℃, 62℃, 63℃, 64℃ or 65℃, but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0061] In some embodiments, the winding tension is 200N-300N, for example, it can be 200N, 210N, 220N, 230N, 240N, 250N, 260N, 270N, 280N, 290N or 300N, and the taper is 40%-46.3%, for example, it can be 40%, 41%, 42%, 43%, 44%, 45%, 46% or 46.3%, but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0062] In certain embodiments, the drying is performed in three stages, and the temperature of each stage increases sequentially.

[0063] In some embodiments, the drying temperature is 60°C-85°C, for example, 60°C, 65°C, 70°C, 75°C, 80°C or 85°C, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0064] In certain embodiments, the aging temperature is 20°C-50°C, for example, it can be 20°C, 22°C, 24°C, 26°C, 28°C, 30°C, 32°C, 34°C, 36°C, 38°C, 40°C, 42°C, 44°C, 46°C, 48°C or 50°C, and the time is 48h-72h, for example, it can be 48h, 50h, 52h, 54h, 56h, 58h, 60h, 62h, 64h, 66h, 68h, 70h or 72h, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0065] In certain embodiments, the electronic cigarette packaging material is cut after being matured.

[0066] In some embodiments, the slitting process uses a disc blade, the acceleration time is 20s-30s, for example, it can be 20s, 21s, 22s, 23s, 24s, 25s, 26s, 27s, 28s, 29s or 30s, and the deceleration time is 15s-20s, for example, it can be 15s, 16s, 17s, 18s, 19s or 20s, but it is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0067] The present invention effectively avoids burrs or tears on the edges of the packaging material by respectively limiting the acceleration time and deceleration time of the slitting process.

[0068] In certain embodiments, the electronic cigarette packaging material is inspected before lamination and after aging, with a focus on whether there are pitting, wrinkles, tunnels, material shrinkage, water ripples, knife wires, empty glue, wire drawing, crystal point scratches and other problems on the film surface.

[0069] Example 1

[0070] This embodiment provides a packaging material for electronic cigarettes and a preparation method thereof, such as Figure 1 As shown, the electronic cigarette packaging material is composed of a stacked polytrifluorochloroethylene layer 1, a polyurethane adhesive layer 2, and a polyvinyl chloride layer 3. The adhesive used in the polyurethane adhesive layer 2 is a three-component polyurethane adhesive, including adhesive LA051, adhesive LA055, adhesive LA031, and ethyl acetate, with a mass ratio of 54:22.5:6:55.

[0071] In this embodiment, the polytrifluorochloroethylene layer 1 is an Aclar 160 product improved by Honeywell in the United States, with a thickness of 15 μm; the polyvinyl chloride layer 3 is a transparent pharmaceutical bag standard PVC product that meets the YBB00212005-2015 standard, with a thickness of 250 μm, that is, the thickness ratio of the two is 0.06:1.

[0072] The method for preparing the above-mentioned electronic cigarette packaging material comprises the following steps:

[0073] (1) Inspection: The polytrifluorochloroethylene layer 1 and the polyvinyl chloride layer 3 are inspected separately using the Huangshan Sanxia inspection machine. A high-speed camera is used to capture abnormal defects on the surface of the film layer, focusing on the surface flatness of the film layer to ensure that there are no defects such as undulating edges, crystal points, water ripples, and color blocks.

[0074] (2) Compounding: The BOBST dry compounding machine was used to synchronously unwind the polytrifluorochloroethylene layer 1 and the polyvinyl chloride layer 3, and the unwinding tension of the polytrifluorochloroethylene layer 1 was controlled to be 65±5N, and the unwinding tension of the polyvinyl chloride layer 3 was controlled to be 260±10N, and the vehicle speed was 35m / min; at the same time, an online corona treatment was performed, and the online corona power of the polytrifluorochloroethylene layer 1 was controlled to be 1.2kW, and the online corona power of the polyvinyl chloride layer 3 was controlled to be 5kW; then a three-component polyurethane adhesive was applied, and the gluing tension was 140N, and the gluing amount was 3.2g / m 2 , viscosity is 21±2s, the positive pressure of the scraper is controlled to be 0.36±0.05MPa, the negative pressure of the scraper is 0.18±0.05MPa, the laminating pressure is 0.42±0.05MPa, and the laminating temperature is 60±2℃; the winding tension is 250N, and the taper is 45%; the drying temperatures of the three-stage oven are set to 60℃, 78℃, and 85℃ respectively, and the preheating temperature is 30±2℃.

[0075] (3) Aging: The composite film obtained in step (2) was allowed to stand at room temperature (20°C) for 48 hours, and then allowed to stand at 50°C for 72 hours.

[0076] (4) Inspection: The Huangshan Sanxia inspection machine is used to inspect the composite film after curing, and a high-speed camera is used to capture abnormal defects on the surface of the film layer, focusing on whether there are pitting, wrinkles, tunnels, material shrinkage, water ripples, knife wires, empty glue, wire drawing, crystal point scratches and other problems on the surface of the film layer.

[0077] (5) Cutting: Replace the slitting machine with a sharp disc blade and cut the composite film after inspection. Set the acceleration time to 25s and the deceleration time to 18s.

[0078] (6) Packaging: Use a paper tube with a diameter of 3 inches and a wall thickness of 15 mm for rolling. The width of the paper tube is required to be 2 mm wider than the finished composite film. Use a five-layer top and bottom box and a five-layer blank top and bottom cover for packaging. Place it flat on a plastic pallet to obtain the packaging material for electronic cigarettes.

[0079] Example 2

[0080] This embodiment provides a packaging material for electronic cigarettes and a preparation method thereof, such as Figure 1 As shown, the electronic cigarette packaging material is composed of a stacked polytrifluorochloroethylene layer 1, a polyurethane adhesive layer 2, and a polyvinyl chloride layer 3. The adhesive used in the polyurethane adhesive layer 2 is a three-component polyurethane adhesive, including adhesive LA051, adhesive LA055, adhesive LA031, and ethyl acetate, with a mass ratio of 54:22.5:6:50.

[0081] In this embodiment, the polytrifluorochloroethylene layer 1 is an Aclar 160 product improved by Honeywell in the United States, with a thickness of 40 μm; the polyvinyl chloride layer 3 is a transparent pharmaceutical package standard PVC product that meets the YBB00212005-2015 standard, with a thickness of 100 μm, that is, the thickness ratio of the two is 0.4:1.

[0082] The method for preparing the above-mentioned electronic cigarette packaging material comprises the following steps:

[0083] (1) Inspection: The polytrifluorochloroethylene layer 1 and the polyvinyl chloride layer 3 are inspected separately using the Huangshan Sanxia inspection machine. A high-speed camera is used to capture abnormal defects on the surface of the film layer, focusing on the surface flatness of the film layer to ensure that there are no defects such as undulating edges, crystal points, water ripples, and color blocks.

[0084] (2) Compounding: The polytrifluorochloroethylene layer 1 and the polyvinyl chloride layer 3 were unwound synchronously using a BOBST dry compounding machine, with the unwinding tension of the polytrifluorochloroethylene layer 1 controlled at 85±5N and the unwinding tension of the polyvinyl chloride layer 3 controlled at 300±10N, and the vehicle speed was 30m / min; at the same time, an online corona treatment was performed, with the online corona power of the polytrifluorochloroethylene layer 1 controlled at 1.3kW and the online corona power of the polyvinyl chloride layer 3 controlled at 5.1kW; then, a three-component polyurethane adhesive was applied, with a gluing tension of 100N and a gluing amount of 3g / m 2 , viscosity is 21±2s, the positive pressure of the scraper is controlled to be 0.36±0.05MPa, the negative pressure of the scraper is 0.18±0.05MPa, the laminating pressure is 0.42±0.05MPa, and the laminating temperature is 60±2℃; the winding tension is 250N, and the taper is 40%; the drying temperatures of the three-stage oven are set to 60℃, 78℃, and 85℃ respectively, and the preheating temperature is 30±2℃.

[0085] (3) Aging: The composite film obtained in step (2) was allowed to stand at room temperature (20°C) for 48 hours, and then allowed to stand at 50°C for 72 hours.

[0086] (4) Inspection: The Huangshan Sanxia inspection machine is used to inspect the composite film after curing, and a high-speed camera is used to capture abnormal defects on the surface of the film layer, focusing on whether there are pitting, wrinkles, tunnels, material shrinkage, water ripples, knife wires, empty glue, wire drawing, crystal point scratches and other problems on the surface of the film layer.

[0087] (5) Cutting: Replace the slitting machine with a sharp disc blade and cut the composite film after inspection. Set the acceleration time to 20s and the deceleration time to 15s.

[0088] (6) Packaging: Use a paper tube with a diameter of 3 inches and a wall thickness of 15 mm for rolling. The width of the paper tube is required to be 2 mm wider than the finished composite film. Use a five-layer top and bottom box and a five-layer blank top and bottom cover for packaging. Place it flat on a plastic pallet to obtain the packaging material for electronic cigarettes.

[0089] Example 3

[0090] This embodiment provides a packaging material for electronic cigarettes and a preparation method thereof, such as Figure 1 As shown, the electronic cigarette packaging material is composed of a stacked polytrifluorochloroethylene layer 1, a polyurethane adhesive layer 2, and a polyvinyl chloride layer 3. The adhesive used in the polyurethane adhesive layer 2 is a three-component polyurethane adhesive, including adhesive LA051, adhesive LA055, adhesive LA031, and ethyl acetate, with a mass ratio of 54:22.5:6:60.

[0091] In this embodiment, the polytrifluorochloroethylene layer 1 is an Aclar 160 product improved by Honeywell in the United States, with a thickness of 100 μm; the polyvinyl chloride layer 3 is a transparent pharmaceutical bag standard PVC product that meets the YBB00212005-2015 standard, with a thickness of 250 μm, that is, the thickness ratio of the two is 0.4:1.

[0092] The method for preparing the above-mentioned electronic cigarette packaging material comprises the following steps:

[0093] (1) Inspection: The polytrifluorochloroethylene layer 1 and the polyvinyl chloride layer 3 are inspected separately using the Huangshan Sanxia inspection machine. A high-speed camera is used to capture abnormal defects on the surface of the film layer, focusing on the surface flatness of the film layer to ensure that there are no defects such as undulating edges, crystal points, water ripples, and color blocks.

[0094] (2) Compounding: The BOBST dry compounding machine was used to synchronously unwind the polytrifluorochloroethylene layer 1 and the polyvinyl chloride layer 3, and the unwinding tension of the polytrifluorochloroethylene layer 1 was controlled to be 45±5N, and the unwinding tension of the polyvinyl chloride layer 3 was controlled to be 220±10N, and the vehicle speed was 40m / min; at the same time, an online corona treatment was performed, and the online corona power of the polytrifluorochloroethylene layer 1 was controlled to be 1.2kW, and the online corona power of the polyvinyl chloride layer 3 was controlled to be 5kW; then a three-component polyurethane adhesive was applied, and the gluing tension was 180N, and the gluing amount was 3.5g / m 2 , viscosity is 21±2s, the positive pressure of the scraper is controlled to be 0.36±0.05MPa, the negative pressure of the scraper is 0.18±0.05MPa, the laminating pressure is 0.42±0.05MPa, and the laminating temperature is 60±2℃; the winding tension is 250N, and the taper is 46.3%; the drying temperatures of the three-stage oven are set to 60℃, 78℃, and 85℃ respectively, and the preheating temperature is 30±2℃.

[0095] (3) Aging: The composite film obtained in step (2) was allowed to stand at room temperature (20°C) for 48 hours, and then allowed to stand at 50°C for 72 hours.

[0096] (4) Inspection: The Huangshan Sanxia inspection machine is used to inspect the composite film after curing, and a high-speed camera is used to capture abnormal defects on the surface of the film layer, focusing on whether there are pitting, wrinkles, tunnels, material shrinkage, water ripples, knife wires, empty glue, wire drawing, crystal point scratches and other problems on the surface of the film layer.

[0097] (5) Cutting: Replace the slitting machine with a sharp disc blade and cut the composite film after inspection. Set the acceleration time to 30s and the deceleration time to 20s.

[0098] (6) Packaging: Use a paper tube with a diameter of 3 inches and a wall thickness of 15 mm for rolling. The width of the paper tube is required to be 2 mm wider than the finished composite film. Use a five-layer top and bottom box and a five-layer blank top and bottom cover for packaging. Place it flat on a plastic pallet to obtain the packaging material for electronic cigarettes.

[0099] Comparative Example 1

[0100] This comparative example provides a packaging material for electronic cigarettes and a preparation method thereof. Except that the three-component polyurethane adhesive is replaced with a two-component polyurethane adhesive, including adhesive LA051, adhesive LA055 and ethyl acetate, and the mass ratio is 54:22.5:55, the remaining structures and conditions are the same as those in Example 1, so they are not repeated here.

[0101] Comparative Example 2

[0102] This comparative example provides a packaging material for electronic cigarettes and a preparation method thereof. Except that the three-component polyurethane adhesive is changed to a single-component polyurethane adhesive, including adhesive LA051 and ethyl acetate, and the mass ratio is 54:55, the remaining structures and conditions are the same as those in Example 1, so they are not repeated here.

[0103] Comparative Example 3

[0104] This comparative example provides a packaging material for an electronic cigarette, which directly adopts a polyvinyl chloride film (model SG-3) with a thickness of 250 μm.

[0105] Comparative Example 4

[0106] This comparative example provides a packaging material for an electronic cigarette, which directly adopts a polyvinylidene chloride film (model SGA-1) with a thickness of 250 μm.

[0107] Performance Testing

[0108] (1) Physical properties: The peel strength was determined according to the peel strength determination method (YBB0010:2003-2015); the heat seal strength was determined according to the heat seal strength determination method (YBB0012:2003-2015); and the solvent residue was determined according to the solvent residue determination method (YBB0031:2004-2015).

[0109] (2) Barrier properties: The water vapor transmission rate (electrolysis method) and oxygen transmission rate (differential pressure method) were tested in accordance with standard YBB00212003-2015. The test conditions were 23±0.5°C and relative humidity was 90%±2%.

[0110] (3) Low temperature resistance: The tensile strength of different packaging materials was tested at room temperature (20°C) and low temperature (-15°C).

[0111] (4) Fragrance retention: The molecular contents of isoamyl acetate, ethyl butyrate, and citral in different packaging of packaged e-cigarettes were tested after 15 days. The flavor content was analyzed using liquid chromatography-mass spectrometry and ultra-high performance liquid chromatography, and the esters of isoamyl acetate, ethyl butyrate, and citral were 2 mg / mL as the benchmark.

[0112] The test results of the packaging materials obtained in Examples 1-3 and Comparative Examples 1-4 are shown in Tables 1 and 2 below.

[0113] Table 1

[0114]

[0115] Table 2

[0116]

[0117] In the above table, the unit of water vapor transmission rate is g / (m 2 24h), the unit of oxygen transmission rate is cm 3 / (m 2 ·24h·0.1MPa).

[0118] It can be seen that the "polytrifluorochloroethylene layer-polyurethane adhesive layer-polyvinyl chloride layer" sandwich structure provided by the present invention can effectively reduce the penetration of water vapor and oxygen outside the packaging material into the internal space of the packaging, and can also effectively resist the brittleness of the product at low temperatures and prevent the packaging from breaking. At the same time, it can maintain the electronic cigarette fragrance molecules in the packaging space for a long time and prevent the loss of fragrance molecules, thereby enhancing the product's attractiveness and user experience.

[0119] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A packaging material for electronic cigarettes, characterized in that: The electronic cigarette packaging material is composed of a polytrifluorochloroethylene layer, a polyurethane adhesive layer and a polyvinyl chloride layer that are stacked; Wherein, the adhesive used in the polyurethane adhesive layer is a three-component polyurethane adhesive.

2. The electronic cigarette packaging material according to claim 1, characterized in that: The three-component polyurethane adhesive includes adhesive LA051, adhesive LA055, adhesive LA031 and an organic solvent; Wherein, the organic solvent includes ethyl acetate.

3. The electronic cigarette packaging material according to claim 2, characterized in that: The mass ratio of the adhesive LA051, the adhesive LA055, the adhesive LA031 and the organic solvent is (50-55):(22-23):(5-8):(50-60).

4. The electronic cigarette packaging material according to any one of claims 1 to 3, characterized in that: The thickness of the polychlorotrifluoroethylene layer is 15 μm-100 μm; And / or, the thickness of the polyvinyl chloride layer is 100 μm-250 μm.

5. The electronic cigarette packaging material according to claim 4, characterized in that: The thickness ratio of the polytrifluorochloroethylene layer to the polyvinyl chloride layer is (0.06-0.4):

1.

6. A method for preparing the electronic cigarette packaging material according to any one of claims 1 to 5, characterized in that: The preparation method at least comprises: using a dry composite process to composite a polytrifluorochloroethylene layer and a polyvinyl chloride layer together through a three-component polyurethane adhesive, and then drying and aging to obtain an electronic cigarette packaging material.

7. The preparation method according to claim 6, characterized in that The dry lamination process includes: using a dry laminating machine to simultaneously unwind the polytrifluorochloroethylene layer and the polyvinyl chloride layer, applying a three-component polyurethane adhesive after online corona treatment, and laminating and rewinding.

8. The preparation method according to claim 7, characterized in that The unwinding tension of the polytrifluorochloroethylene layer is 40N-90N, and the unwinding tension of the polyvinyl chloride layer is 200N-320N; And / or, the speed of the unwinding operation is 30m / min-40m / min; And / or, the online corona power of the polytrifluorochloroethylene layer is 1.2kW-1.3kW, and the online corona power of the polyvinyl chloride layer is 5kW-5.1kW; And / or, the coating tension of the three-component polyurethane adhesive is 100N-180N, and the glue amount is 3g / m 2 -3.5g / m 2 , the adhesive surface is located on the corona surface of the polyvinyl chloride layer; and / or, the lamination pressure is 0.35 MPa-0.5 MPa and the temperature is 55° C.-65° C.; And / or, the winding tension is 200N-300N, and the taper is 40%-46.3%.

9. The preparation method according to claim 6, characterized in that The drying is a three-stage drying process, and the temperature of each stage is increased successively; And / or, the drying temperature is 60°C-85°C; And / or, the aging temperature is 20° C.-50° C., and the aging time is 48 h-72 h.

10. The preparation method according to claim 6, characterized in that The electronic cigarette packaging material is cut after being matured; The slitting process uses a disc blade, with an acceleration time of 20s-30s and a deceleration time of 15s-20s.

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