Heat preservation packaging bag

Abstract

The utility model relates to a heat preservation packaging bag which comprises a bag body, the bag body comprises hot-pressing non-woven fabric on the inner layer, film-coated non-woven fabric on the outer layer and a heat preservation interlayer arranged between the hot-pressing non-woven fabric and the film-coated non-woven fabric, and the heat preservation interlayer comprises an inner heat absorption layer, a heat preservation layer, a heat insulation layer and a heat preservation fiber layer which are compounded with one another. By the adoption of the multi-layer composite structure design, the heat preservation performance can be remarkably improved, the heat preservation time is prolonged, and the overall strength and durability of the packaging bag are enhanced. The hot-pressed non-woven fabric provides good softness and air permeability, and the film-coated non-woven fabric increases the waterproof and moistureproof capabilities.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to a heat-insulating packaging bag. Background Art

[0002] With the rapid development of e-commerce and cold chain logistics, there is a growing demand for packaging materials that can effectively maintain the temperature stability of items such as food and medicine. Traditional thermal insulation packaging bags typically use a single or simple multi-layer structure to achieve thermal insulation, but these solutions often have certain limitations.

[0003] Common thermal insulation bags on the market today primarily consist of single- or multi-layer plastic film, aluminum foil, and other composite materials. While these products can meet basic insulation needs to a certain extent, their thermal insulation performance often falls short in extreme weather conditions or during long transportation periods. Furthermore, the use of traditional materials limits the product's environmental performance and increases the burden on waste disposal.

[0004] Specifically:

[0005] 1. Insufficient insulation effect: Most existing insulation packaging bags rely on the thermal insulation properties of the material itself and lack an effective multi-level temperature control mechanism.

[0006] 2. Poor adaptability: When faced with different ambient temperature changes, traditional packaging bags are difficult to provide continuous and stable insulation effects.

[0007] 3. Environmental issues: The large-scale use of thermal insulation packaging bags made of non-degradable plastics has placed a heavy burden on the environment.

[0008] In order to solve the above problems, the present application proposes a new design of thermal insulation packaging bag. Utility Model Content

[0009] In view of the deficiencies in the background technology, the utility model provides a heat-insulating packaging bag.

[0010] The technical solution adopted by the utility model is: an insulation packaging bag, including a bag body, the bag body including an inner layer of hot-pressed non-woven fabric, an outer layer of laminated non-woven fabric and a thermal insulation interlayer arranged between the hot-pressed non-woven fabric and the laminated non-woven fabric, the thermal insulation interlayer including a composite inner heat-absorbing layer, a thermal insulation layer, a heat-insulating layer and a thermal insulation fiber layer.

[0011] Furthermore, the inner heat absorption layer is a phase change material (PCM) layer.

[0012] Furthermore, the inner heat absorption layer is 1-3 μm.

[0013] Furthermore, the thermal insulation layer is a nanoporous material layer.

[0014] Furthermore, the thickness of the thermal insulation layer is 2-3 μm.

[0015] Furthermore, the thermal insulation layer is an aerogel layer.

[0016] Furthermore, a temperature sensor is provided on the inner wall of the bag body, a temperature display screen is provided on the surface of the bag body, and the temperature sensor is connected to the temperature display screen.

[0017] Furthermore, a transparent window is provided on the bag body.

[0018] The beneficial effects of the utility model are:

[0019] 1. Enhanced Insulation: The thermal insulation interlayer in this application consists of a heat-absorbing layer, a heat-insulating layer, a heat-insulating layer, and a heat-insulating fiber layer. This multi-layered design effectively blocks the influence of the external ambient temperature. At the same time, the internal heat-absorbing layer absorbs and stores heat, allowing the contents of the packaging bag to maintain the desired temperature range for a longer period of time. Compared with traditional single-material or simple multi-layer structures, this design significantly improves insulation efficiency.

[0020] 2. Improved adaptability and stability: Due to the combination of multiple functional layers, this thermal insulation packaging bag not only performs well under normal conditions, but also provides stable insulation performance in extreme weather conditions. Whether in high or low temperature environments, it can effectively protect the contents of the bag from external temperature fluctuations.

[0021] 3. Improved durability: The inner layer uses heat-pressed non-woven fabric to increase the overall softness and wear resistance of the packaging bag; the outer layer uses coated non-woven fabric with excellent waterproof and moisture-proof properties. This combination makes the product more durable and extends its service life.

[0022] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages.

[0023] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the present utility model.

[0025] Figure 2 Schematic diagram of the composite cross section of the bag material

[0026] Figure 1-2 Middle: 1. Bag body; 2. Hot-pressed non-woven fabric; 3. Laminated non-woven fabric; 4. Thermal insulation interlayer; 5. Inner heat-absorbing layer; 6. Thermal insulation layer; 7. Thermal insulation layer; 8. Thermal insulation fiber layer; 9. Temperature sensor; 10. Temperature display; 11. Transparent window. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] The utility model provides a heat-insulating packaging bag.

[0030] In this embodiment, referring to Figure 1-2 The thermal insulation packaging bag includes a bag body 1, which includes an inner layer of hot-pressed non-woven fabric 2, an outer layer of laminated non-woven fabric 3, and a thermal insulation interlayer 4 arranged between the hot-pressed non-woven fabric and the laminated non-woven fabric. The thermal insulation interlayer 4 includes a composite inner heat-absorbing layer 5, a thermal insulation layer 6, a thermal insulation layer 7 and a thermal insulation fiber layer 8.

[0031] The above-mentioned technical solution, through the use of a multi-layer composite structure design, can significantly improve thermal insulation performance, extend the heat preservation time, and enhance the overall strength and durability of the packaging bag. The heat-pressed non-woven fabric provides good softness and breathability, while the laminated non-woven fabric increases waterproof and moisture-proof capabilities.

[0032] The composite layers can be composited with each other using existing methods, as described below:

[0033] 1. Composite of inner heat absorbing layer and thermal insulation layer:

[0034] The inner heat-absorbing layer (e.g., a phase change material layer) can be fixed to the insulation layer by coating or bonding. Specifically, the phase change material can be prefabricated into a film or sheet, which can then be evenly adhered to the insulation layer using hot melt adhesive or other suitable adhesive.

[0035] In order to ensure good contact and adhesion, the surface of the insulation layer can be properly pretreated before coating, such as cleaning and activation.

[0036] 2. Composite of thermal insulation layer and heat insulation layer:

[0037] The thermal insulation layer (e.g., nanoporous material layer) and the insulating layer (e.g., aerogel layer) can be bonded together by hot pressing or bonding. In the hot pressing method, the two layers are placed between heated plates and pressed under a certain temperature and pressure to form a tight bond.

[0038] If an adhesive is used, select one with good temperature resistance and low thermal conductivity to ensure it does not affect the overall insulation performance.

[0039] 3. Composite of thermal insulation layer and thermal insulation fiber layer:

[0040] The thermal insulation layer and the thermal insulation fiber layer can be compounded by needle punching, hot melting or spraying, etc. For example, the thermal insulation fiber can be fixed on the thermal insulation layer by needle punching technology to form a solid whole.

[0041] Another method is to use hot melt method to bond the thermal insulation fiber layer to the thermal insulation layer with hot melt adhesive. This method can ensure good bonding between the fiber layer and the thermal insulation layer.

[0042] 4. Composite of thermal insulation interlayer and hot pressed non-woven fabric:

[0043] The laminated insulation interlayer is placed on the hot-pressed non-woven fabric and can be bonded using hot melt adhesive or other adhesives. Alternatively, the laminate can be laminated using a hot press under a certain temperature and pressure to tightly bond the layers.

[0044] Ensure that the bonding strength between the heat-pressed non-woven fabric and the thermal insulation interlayer is sufficient to prevent delamination during use.

[0045] 5. Composite of laminated non-woven fabric and thermal insulation interlayer:

[0046] The laminated nonwoven fabric, as the outermost layer, can be bonded to the outer side of the insulation interlayer (i.e., the insulation fiber layer) using hot melt adhesive or hot pressing. Hot melt adhesive can be evenly applied to the laminated nonwoven fabric, then covered with the insulation interlayer and firmly bonded using hot pressing.

[0047] In order to improve the waterproof and moisture-proof performance, the laminated surface of the laminated non-woven fabric should face the outside to form an effective waterproof barrier.

[0048] Specifically, the inner heat absorption layer is a phase change material (PCM) layer.

[0049] Using phase change material as the inner heat-absorbing layer can absorb or release heat when the temperature changes, thereby maintaining a stable temperature inside the packaging bag. This enables the packaging bag to provide consistent insulation under different environmental conditions, making it particularly suitable for applications requiring precise temperature control.

[0050] Specifically, the inner heat absorption layer is 1-3 μm.

[0051] Controlling the thickness of the inner heat absorption layer within the range of 1-3 μm can ensure sufficient heat absorption capacity without increasing excessive weight and volume, making the entire packaging bag lighter and more practical.

[0052] Specifically, the thermal insulation layer is a nanoporous material layer.

[0053] Nanoporous materials have extremely low thermal conductivity, effectively preventing heat conduction and significantly improving the thermal insulation performance of the insulation layer. They are also lightweight, further optimizing the overall performance of the packaging bag.

[0054] Specifically, the thickness of the thermal insulation layer is 2-3 μm.

[0055] The thickness of the insulation layer is set at 2-3μm, ensuring the best balance between insulation effect and material cost. Such thickness can effectively block heat transfer without making the packaging bag too thick.

[0056] Specifically, the thermal insulation layer is an aerogel layer.

[0057] Aerogel is a highly effective thermal insulation material. Its ultra-low density and high porosity make it an ideal insulation layer material. Using an aerogel layer can greatly reduce heat loss and further enhance the thermal insulation performance of thermal insulation packaging bags.

[0058] Specifically, a temperature sensor 9 is provided on the inner wall of the bag body, and a temperature display screen 10 is provided on the surface of the bag body. The temperature sensor is connected to the temperature display screen.

[0059] The built-in temperature sensor and external display screen allow users to monitor the temperature inside the packaging bag in real time, ensuring that the items are kept in suitable storage conditions. This is especially important for foods and medicines that require strict temperature control.

[0060] Specifically, a transparent window 11 is provided on the bag body.

[0061] The transparent window design allows users to directly observe the contents of the bag and check whether they are intact without opening the package. This feature improves the user experience and helps to quickly confirm the condition of the items.

[0062] Technical personnel please note: Although the utility model has been described according to the above specific implementation methods, the concept of the utility model is not limited to this utility model. Any modification using the concept of the utility model will be included in the scope of protection of this patent right.

Claims

1. A heat-insulating packaging bag, comprising a bag body, characterized in that: The bag body includes an inner layer of hot-pressed non-woven fabric, an outer layer of laminated non-woven fabric, and a thermal insulation interlayer arranged between the hot-pressed non-woven fabric and the laminated non-woven fabric. The thermal insulation interlayer includes a composite inner heat-absorbing layer, a thermal insulation layer, a thermal insulation layer and a thermal insulation fiber layer.

2. The heat-insulating packaging bag according to claim 1, characterized in that: The inner heat absorption layer is a phase change material (PCM) layer.

3. The heat-insulating packaging bag according to claim 1 or 2, characterized in that: The inner heat absorption layer is 1-3 μm.

4. The heat-insulating packaging bag according to claim 1, characterized in that: The thermal insulation layer is a nanoporous material layer.

5. The heat-insulating packaging bag according to claim 1 or 4, characterized in that: The thickness of the thermal insulation layer is 2-3 μm.

6. The heat-insulating packaging bag according to claim 1, characterized in that: The heat insulation layer is an aerogel layer.

7. The heat-insulating packaging bag according to claim 1, characterized in that: A temperature sensor is provided on the inner wall of the bag body, a temperature display screen is provided on the surface of the bag body, and the temperature sensor is connected to the temperature display screen.

8. The heat-insulating packaging bag according to claim 1, characterized in that: The bag body is provided with a transparent window.

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