Aluminum foil for medicine packaging

Abstract

An aluminum foil for medicine packaging relates to the technical field of packaging materials. The problem that an existing aluminum foil is prone to tearing and air leakage is solved. The packaging structure comprises a protective layer, an ink layer, an aluminum foil layer and a heat sealing layer which are sequentially arranged, the aluminum foil layer is provided with a first area used for covering a plate face and a plurality of second areas used for covering a bubble cap, the second areas are distributed in a rectangular array mode, and the heat sealing layer is only coated on the first area. The plate surface is a plane, the bubble cap is concave inwards, the heat-sealing layer is only coated on the first area, the second area is not provided with the heat-sealing layer, and when the aluminum foil and the medicine plate are subjected to heat sealing, because the edge of the bubble cap is not provided with the heat-sealing layer, the edge of the bubble cap is very smooth, the heat-sealing part is not provided with saw-toothed points, the heat sealing of the bubble cap is uniform, and the service life of the bubble cap is prolonged. And the aluminum foil is more balanced in stress and not easy to tear.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging materials, in particular to an aluminum foil for medicine packaging. Background Art

[0002] PTP aluminum foil is widely used as the covering layer of blister packaging for solid dosage medicines. A heat-sealing layer is provided on one side of the aluminum foil layer. The existing heat-sealing layer is generally fully coated with the aluminum foil layer. When the aluminum foil and the blister are heat-sealed, the edge of the blister is not smooth, resulting in jagged spots on the heat-sealed area.

[0003] When the medicine board is undergoing an airtightness test, the heat-sealed edge is subjected to a greater pressure, and the reverse pressure on the aluminum foil in the blister cavity will increase, causing the aluminum foil to tear and leak.

[0004] In summary, the existing aluminum foil has the problem of being easily torn and leaking. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the aluminum foil is impacted by the air pressure in the blister, the heat-sealed edge is subjected to a large pressure, and then the aluminum foil is torn and leaked. In addition, an aluminum foil for medicine packaging is provided.

[0006] The technical solution of the utility model is: an aluminum foil for medicine packaging, comprising: a protective layer, an ink layer, an aluminum foil layer and a heat-sealing layer arranged in sequence, the aluminum foil layer having a first area covering the plate surface and a second area covering the blister, the second area having a plurality of blister layers distributed in a rectangular array;

[0007] The heat seal layer is coated only on the first area.

[0008] Furthermore, the heat-sealing layer is formed by spot coating of water-based polyurethane.

[0009] Furthermore, the thickness of the heat-sealing layer ranges from 2.8 mm to 3.2 mm.

[0010] Furthermore, the aluminum foil layer is tough aluminum foil.

[0011] Furthermore, the thickness of the aluminum foil layer ranges from 23 mm to 27 mm.

[0012] Furthermore, the thickness of the ink layer ranges from 0.8 mm to 1.2 mm.

[0013] Furthermore, the protective layer is formed by continuous coating of water-based polyurethane.

[0014] Furthermore, the thickness of the protective layer ranges from 0.8 mm to 1.2 mm.

[0015] Compared with the prior art, the present invention has the following effects:

[0016] 1. The aluminum foil for pharmaceutical packaging provided by the present invention has a heat-sealing layer only coated on the first area, and no heat-sealing layer is applied on the second area. When the aluminum foil is heat-sealed with the medicine plate, the edge of the blister is very smooth because there is no heat-sealing layer on the edge of the blister, and there are no jagged points on the heat-sealed part. The blister is heat-sealed evenly, and the aluminum foil is more balanced in force and is not easily torn.

[0017] 2. The aluminum foil for medicine packaging provided by the present invention has no heat-sealing layer in the second area, which reduces the amount of raw materials used, thereby ensuring that the aluminum foil is not torn and saving costs, and having a better use effect.

[0018] 3. The aluminum foil for pharmaceutical packaging provided by the present invention has a water-based polyurethane protective layer with excellent high temperature resistance, wear resistance and scratch resistance, and as the surface layer of the aluminum foil, it can well protect the ink layer.

[0019] 4. The aluminum foil for medicine packaging provided by the present invention has the characteristics of high elongation at break, which can meet the impact and tearing of the aluminum foil during the air tightness test and play the role of sealing and protecting the contents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the aluminum foil for medicine packaging of the utility model;

[0021] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle.

[0022] In the figure: 1, protective layer; 2, ink layer; 3, aluminum foil layer; 4, heat sealing layer; 5, first area; 6, second area. DETAILED DESCRIPTION

[0023] Specific implementation method 1: Combination Figure 1 、 Figure 2 To illustrate this embodiment, this embodiment includes a protective layer 1, an ink layer 2, an aluminum foil layer 3 and a heat-sealing layer 4 arranged in sequence. The aluminum foil layer 3 has a first area 5 for covering the board surface and a second area 6 for covering the blister. The second area 6 has a plurality of areas distributed in a rectangular array. The heat-sealing layer 4 is only coated on the first area 5. It should be noted that the board surface, i.e., the other areas on the medicine board except the blisters, is flat, and the blisters are concave inward.

[0024] In the aluminum foil for pharmaceutical packaging of this embodiment, the heat-sealing layer 4 is only applied to the first area 5, and the second area 6 does not have the heat-sealing layer 4. When the aluminum foil is heat-sealed with the medicine plate, the edge of the blister is very smooth because there is no heat-sealing layer 4. There are no jagged points at the heat-sealed part, the blister is heat-sealed evenly, the aluminum foil is more balanced in force, and is not easily torn.

[0025] Specific implementation method 2: Combination Figure 1 To explain this embodiment, the heat-seal layer 4 is formed by spot-coating a water-based polyurethane. Water-based polyurethane uses water as a solvent and does not contain toxic or hazardous organic solvents. Therefore, it does not pollute the environment during use and is less likely to cause fires or other safety hazards, thus providing a high level of safety. Of course, the above description is not restrictive. As an alternative embodiment, the heat-seal layer 4 can also be formed by spot-coating a polymer compound such as polypropylene. Other components and connections are the same as those in the first embodiment.

[0026] Specific implementation method three: Combination Figure 1 The thickness of the heat seal layer 4 of this embodiment is in the range of 2.8mm-3.2mm. The thickness of the heat seal layer 4 within the above range has a better effect. The other components and connection relationships are the same as those of the second embodiment.

[0027] Specific implementation method four: Combination Figure 1 To explain this embodiment, the aluminum foil layer 3 is a tough aluminum foil formed by repeated hot rolling followed by annealing and softening in a high-temperature furnace. This tough aluminum foil exhibits a high elongation at break, which withstands impact and tearing during airtightness testing, effectively sealing and protecting the contents. Other components and connections are the same as those in the first embodiment.

[0028] Specific implementation method five: Combination Figure 1 The thickness of the aluminum foil layer 3 in this embodiment is in the range of 23mm-27mm. The thickness of the aluminum foil layer 3 within the above range has a better effect. The other components and connection relationships are the same as those in the fourth embodiment.

[0029] Specific implementation method six: combination Figure 1 In this embodiment, the ink layer 2 has a thickness ranging from 0.8 mm to 1.2 mm. This thickness clearly reflects the intended content, and the thickness is relatively moderate, making it suitable for a wider range of applications. Other components and connections are the same as those in the first embodiment.

[0030] Specific implementation method seven: combination Figure 1 To describe this embodiment, protective layer 1 is formed by continuous coating of water-based polyurethane. This water-based polyurethane protective layer 1 exhibits excellent high-temperature resistance, abrasion resistance, and scratch resistance. As the surface layer of the aluminum foil, it effectively protects ink layer 2. The remaining components and connections are the same as those in any of Embodiments 1 to 6.

[0031] Specific implementation method eight: combination Figure 1In this embodiment, the thickness of the protective layer 1 is in the range of 0.8 mm to 1.2 mm. When the thickness of the protective layer 1 is within the above range, the ink layer 2 is better protected. Other components and connection relationships are the same as those in the seventh embodiment.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An aluminum foil for pharmaceutical packaging, comprising: A protective layer (1), an ink layer (2), an aluminum foil layer (3), and a heat-sealing layer (4) are sequentially arranged, wherein the aluminum foil layer (3) has a first area (5) for covering the plate surface and a second area (6) for covering the blister, and the second area (6) has a plurality of areas distributed in a rectangular array; It is characterized in that the heat sealing layer (4) is only coated on the first area (5).

2. The aluminum foil for medicine packaging according to claim 1, characterized in that: The heat-sealing layer (4) is formed by spot coating of water-based polyurethane.

3. The aluminum foil for medicine packaging according to claim 2, characterized in that: The thickness of the heat-sealing layer (4) ranges from 2.8 mm to 3.2 mm.

4. The aluminum foil for medicine packaging according to claim 1, characterized in that: The aluminum foil layer (3) is tough aluminum foil.

5. The aluminum foil for medicine packaging according to claim 4, characterized in that: The thickness of the aluminum foil layer (3) ranges from 23 mm to 27 mm.

6. The aluminum foil for medicine packaging according to claim 1, characterized in that: The thickness of the ink layer (2) ranges from 0.8 mm to 1.2 mm.

7. The aluminum foil for pharmaceutical packaging according to any one of claims 1 to 6, characterized in that: The protective layer (1) is formed by continuous coating of water-based polyurethane.

8. The aluminum foil for medicine packaging according to claim 7, characterized in that: The thickness of the protective layer (1) ranges from 0.8 mm to 1.2 mm.

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