A high temperature resistant packaging composite film
The high-temperature resistant packaging composite film with a multi-layer structure solves the problems of cracking and softening during high-temperature boiling, ensuring the safety and stability of the medicine solution and meeting the requirements for high-temperature sterilization and long-term storage of the medicine solution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHUNDE LIKAI PACKAGE CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-07-14
AI Technical Summary
Existing packaging composite films are prone to cracking or softening when boiled in high-temperature water, leading to microbial contamination of the drug solution and oxidative degradation of its components, threatening the efficacy, safety, and stability of the drug.
The packaging composite film adopts a multi-layer structure, including an outer layer, a barrier layer, and an inner layer. The outer layer is supported by a fiber layer, the barrier layer blocks oxygen and water vapor, and the inner layer is made of high-temperature resistant material. They are tightly bonded together by an adhesive layer to form an overall structure with high strength, barrier performance, and thermal stability.
To prevent the film from rupturing or softening under high temperature conditions, ensure packaging integrity, prevent drug leakage and microbial invasion, block oxidative degradation, extend shelf life, and reduce the risk of adverse reactions after administration.
Smart Images
Figure CN224490323U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pharmaceutical packaging composite films, specifically to a high-temperature resistant packaging composite film. Background Technology
[0002] Traditional Chinese medicine (TCM), applied under the guidance of TCM theory, is a core component of my country's traditional medicine and plays a significant role in improving people's quality of life and health. However, the traditional method of taking TCM decoctions requires patients to prepare the herbs themselves, a cumbersome and time-consuming process. Furthermore, the decoction, rich in sugars, proteins, amino acids, vitamins, and glycosides, becomes an ideal culture medium for microorganisms (such as bacteria and mold). If the decoction is not sealed promptly, microorganisms will multiply rapidly at room temperature (especially in hot seasons), causing the decoction to become sour, rancid, produce flocculent matter or sediment, and even generate toxins. Ingestion may lead to adverse reactions such as nausea, vomiting, and diarrhea, which is extremely inconvenient for busy people with limited time.
[0003] Therefore, pre-prepared decoction products for traditional Chinese medicine have emerged. These products have the decoction process completed by the manufacturer or pharmacy, and the liquid is then packaged into specially designed bags for patients to use as needed. Patients only need to heat the bag in hot water before taking the medicine, greatly simplifying the process. However, existing packaging films have defects such as cracking and softening when boiled in high-temperature water. These defects can lead to microbial contamination of the decoction and oxidative degradation of its components, threatening the efficacy, safety, and stability of the medicine. Utility Model Content
[0004] This invention provides a high-temperature resistant packaging composite film that can solve the problems of existing packaging composite films cracking and softening when boiled in high-temperature water. These defects can lead to microbial contamination of the medicine liquid and oxidative degradation of the components, threatening the efficacy, safety and stability of the medicine.
[0005] A high-temperature resistant packaging composite film includes an outer layer, a barrier layer, and an inner layer. The outer layer includes a support layer, an ink layer, and an ink substrate layer. The support layer is disposed on the outermost side of the entire packaging composite film and includes a fiber layer for deformation of the outer layer under high-temperature boiling conditions. The ink layer is disposed between the support layer and the ink substrate layer. The inner layer is disposed on the innermost side of the entire packaging composite film. The barrier layer is disposed between the ink substrate layer and the inner layer. The outer layer, barrier layer, and inner layer are all pressed together by a hot press.
[0006] According to one embodiment of the present invention, the fiber layer is made of a fibrous material, namely polylactic acid.
[0007] According to one embodiment of the present invention, a first adhesive layer is disposed between the outer layer and the barrier layer, and the first adhesive layer is located between the ink substrate layer and the barrier layer. The first adhesive layer is made of a two-component polyurethane adhesive.
[0008] According to one embodiment of the present invention, a second adhesive layer is provided between the barrier layer and the inner layer. The second adhesive layer is made of a two-component polyurethane adhesive.
[0009] According to one embodiment of the present invention, the ink layer is printed on the ink substrate layer by a thin film printing machine, and the ink substrate layer is made of high-strength polyester material.
[0010] According to one embodiment of the present invention, the barrier layer is made of aluminum foil.
[0011] According to one embodiment of the present invention, the inner layer is made of polypropylene material.
[0012] The advantages of this utility model compared to the prior art are:
[0013] The synergistic effect of the fiber layer and the high-temperature resistant inner layer prevents the membrane from rupturing or softening during boiling, ensuring packaging integrity and preventing leakage of the medicine or microbial invasion. The barrier layer effectively blocks oxygen and water vapor, inhibiting the oxidative degradation of active ingredients in the medicine, extending shelf life, and reducing the risk of adverse reactions after administration.
[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-temperature resistant packaging composite film.
[0017] Figure 2 This is a three-dimensional structural diagram of the outer layer of this utility model.
[0018] Figure 3 This is a three-dimensional structural diagram of the first adhesive layer in this utility model.
[0019] Figure 4 This is a three-dimensional structural diagram of the second adhesive layer in this utility model.
[0020] The reference numerals in the figures include:
[0021] 1. Outer layer; 2. Barrier layer; 3. Inner layer; 4. Support layer; 5. Ink layer; 6. Ink substrate layer; 7. First adhesive layer; 8. Second adhesive layer. Detailed Implementation
[0022] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.
[0023] First Embodiment
[0024] Please see Figures 1 to 4 As shown, a high-temperature resistant packaging composite film includes an outer layer 1, a barrier layer 2, and an inner layer 3. The outer layer 1 includes a support layer 4, an ink layer 5, and an ink substrate layer 6. The support layer 4 is disposed on the outermost side of the entire packaging composite film and includes a fiber layer for the outer layer 1 to deform under high-temperature boiling conditions. The ink layer 5 is disposed between the support layer 4 and the ink substrate layer 6. The inner layer 3 is disposed on the innermost side of the entire packaging composite film. The barrier layer 2 is disposed between the ink substrate layer 6 and the inner layer 3. The outer layer 1, the barrier layer 2, and the inner layer 3 are all pressed together by a hot press.
[0025] This high-temperature resistant packaging composite film achieves high-temperature stability through a multi-layer structure. The outer layer 1 uses a support layer 4 containing a fiber layer as its skeleton. This fiber layer is composed of interwoven high-temperature resistant fibers, resisting deformation of the outer layer 1 under high-temperature boiling conditions and preventing softening or cracking of the film. The ink layer 5 and ink substrate layer 6 are superimposed on the inner side of the support layer 4, ensuring clear printing patterns and resistance to chemical corrosion. The barrier layer 2, located at the core, can be made of aluminum foil or vapor-deposited silica film. Its high barrier properties prevent the penetration of oxygen, water vapor, and microorganisms, protecting the medicinal liquid components from oxidation or contamination. The inner layer 3 can be made of high-temperature resistant polypropylene (CPP) or polyethylene (LLDPE) film, directly contacting the medicinal liquid. Its melting point is higher than the boiling temperature, ensuring that the seal is not affected by high temperatures after heat sealing. All layers are tightly bonded together through a hot-pressing process, forming an integrated structure that combines mechanical strength, barrier properties, and thermal stability, meeting the requirements for high-temperature sterilization and long-term storage of decocted Chinese medicine liquids.
[0026] Through the synergistic effect of the fiber layer and the high-temperature resistant inner layer 3, the membrane is prevented from rupturing or softening during boiling, ensuring packaging integrity and preventing leakage of the medicine or invasion of microorganisms. The barrier layer 2 effectively blocks oxygen and water vapor, inhibiting the oxidative degradation of active ingredients in the medicine, extending shelf life, and reducing the risk of adverse reactions after administration.
[0027] Second Embodiment
[0028] Based on the first embodiment, the fiber layer is made of a fiber material, namely polylactic acid (PLA). PLA is a bio-based biodegradable polymer material with a processing temperature of 170–230°C. It has good solvent resistance and is formed into continuous fibers with a diameter of 10–20 μm through melt spinning, followed by heat setting to enhance crystallinity. Under high-temperature boiling conditions, PLA fibers achieve self-repair through partial melting and recrystallization of crystalline regions, while maintaining overall structural strength. Furthermore, PLA has good gloss, transparency, hand feel, and heat resistance, and also possesses certain antibacterial, flame-retardant, and UV-resistant properties.
[0029] Third Embodiment
[0030] Based on the first embodiment, a first adhesive layer 7 is provided between the outer layer 1 and the barrier layer 2, and the first adhesive layer 7 is located between the ink substrate layer 6 and the barrier layer 2. The first adhesive layer 7 is made of a two-component polyurethane adhesive. The first adhesive layer 7 fills the space between the ink substrate layer 6 and the barrier layer 2. Under high-temperature boiling conditions, the first adhesive layer 7 enhances the interlayer bonding force and prevents moisture from penetrating through the interlayer interface, thus preventing delamination. The first adhesive layer 7 improves the overall strength of the composite film, preventing the outer layer 1 from delaminating, separating, or peeling off from the barrier layer 2 at high temperatures. At the same time, it reduces the moisture penetration path and extends the shelf life of the medicine.
[0031] Fourth embodiment
[0032] Based on the first embodiment, a second adhesive layer 8 is provided between the barrier layer 2 and the inner layer 3. The second adhesive layer 8 is made of a two-component polyurethane adhesive. Under high-temperature boiling conditions, the adhesive layer absorbs interfacial stress through its microphase separation structure, preventing the inner layer 3 from detaching from the barrier layer 2 due to thermal expansion mismatch. Simultaneously, its chemical resistance prevents reaction with the pharmaceutical components. The second adhesive layer 8 improves the overall strength of the composite film, preventing the inner layer 3 from detaching from the barrier layer 2 at high temperatures and ensuring the heat-sealing effect. At the same time, it improves the mechanical reliability of the composite film under high-temperature environments.
[0033] Fifth Embodiment
[0034] Based on the first embodiment, the ink layer 5 is printed onto the ink substrate 6 using a thin-film printing machine. The ink substrate 6 is made of high-strength polyester material. The polyester material has a smooth surface and is resistant to chemical corrosion, ensuring ink adhesion and printing accuracy while preventing direct contact between the ink and the chemical solution. The ink substrate 6, made of high-strength polyester material, ensures clear patterns and vibrant colors printed by the thin-film printing machine. Simultaneously, the ink layer 5 is physically isolated from the chemical solution, preventing the migration of harmful substances.
[0035] Sixth Embodiment
[0036] Based on the first embodiment, the barrier layer 2 is made of aluminum foil. The aluminum foil is formed into a dense metal layer through vacuum evaporation or rolling processes, completely blocking oxygen, water vapor, and light, providing a high level of protection for the drug solution. The good barrier properties of aluminum foil can prevent the degradation of photosensitive components in the drug solution, improve the stability of drug efficacy, and extend the shelf life of the drug solution.
[0037] Seventh Embodiment
[0038] Based on the first embodiment, the inner layer 3 is made of polypropylene. Polypropylene (CPP) has a high melting point (above 160°C) and excellent heat-sealing properties, maintaining its seal even after boiling in hot water. It is also resistant to chemical corrosion, preventing reaction with the pharmaceutical solution. The inner layer 3, made of CPP, ensures that the heat-sealing strength of the high-temperature resistant packaging composite film does not decrease after boiling in hot water, preventing leakage. Furthermore, the chemical stability of CPP prevents the leaching of the inner layer 3 material from contaminating the pharmaceutical solution, ensuring medication safety.
[0039] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A high-temperature resistant packaging composite film, characterized in that, The packaging composite film includes an outer layer (1), a barrier layer (2), and an inner layer (3). The outer layer (1) includes a support layer (4), an ink layer (5), and an ink substrate layer (6). The support layer (4) is located on the outermost side of the entire packaging composite film and includes a fiber layer for the outer layer (1) to deform under high temperature boiling conditions. The ink layer (5) is located between the support layer (4) and the ink substrate layer (6). The inner layer (3) is located on the innermost side of the entire packaging composite film. The barrier layer (2) is located between the ink substrate layer (6) and the inner layer (3). The outer layer (1), the barrier layer (2), and the inner layer (3) are all pressed together by a hot press.
2. The high-temperature resistant packaging composite film as described in claim 1, characterized in that, The fiber layer is made of fibrous material.
3. The high-temperature resistant packaging composite film as described in claim 2, characterized in that, The fiber material is polylactic acid.
4. The high-temperature resistant packaging composite film as described in claim 1, characterized in that, A first adhesive layer (7) is provided between the outer layer (1) and the barrier layer (2), and the first adhesive layer (7) is located between the ink substrate layer (6) and the barrier layer (2).
5. The high-temperature resistant packaging composite film as described in claim 4, characterized in that, The first adhesive layer (7) is made of two-component polyurethane adhesive.
6. The high-temperature resistant packaging composite film as described in claim 1, characterized in that, A second adhesive layer (8) is provided between the barrier layer (2) and the inner layer (3).
7. The high-temperature resistant packaging composite film as described in claim 6, characterized in that, The second adhesive layer (8) is made of two-component polyurethane adhesive.
8. The high-temperature resistant packaging composite film as described in claim 1, characterized in that, The ink layer (5) is printed on the ink substrate layer (6) by a film printing machine. The ink substrate layer (6) is made of high-strength polyester material.
9. The high-temperature resistant packaging composite film as described in claim 1, characterized in that, The barrier layer (2) is made of aluminum foil.
10. The high-temperature resistant packaging composite film as described in claim 1, characterized in that, The inner layer (3) is made of polypropylene.