Intelligent heat preservation bag, manufacturing method and application

Abstract

The invention relates to the technical field of intelligent heat preservation bags, in particular to an intelligent heat preservation bag, a manufacturing method and application, the heat preservation bag is integrated with reversible thermochromic ink or pigment, when the temperature reaches 0 DEG C, the color changes, and therefore the interruption condition of a cold chain can be visually recognized. The printing ink or the pigment is printed on the inner side surface of the transparent outer layer and is protected through the ultraviolet-proof varnish so as to prevent the printing ink or the pigment from being degraded under solar radiation. The heat preservation bag is of a multi-layer structure and comprises a transparent outer layer, a heat insulation middle layer and a food-grade inner layer. The manufacturing process comprises inner layer printing, ultraviolet-proof varnish coating, and then lamination and assembly. The invention provides a simple, reliable and reusable mode, and is used for visually monitoring the condition that the frozen product is exposed to the critical temperature, so that the food safety and the logistics management are improved.

Description

Technical Field

[0001] This invention relates to the field of smart insulated bag technology, specifically a smart insulated bag with a reversible thermochromic indicator that provides UV protection. Background Technology

[0002] Insulated bags are widely used in the transportation of temperature-sensitive products, especially in the logistics of frozen and refrigerated foods. However, existing insulated bags cannot directly and intuitively determine whether a temperature rise has occurred during transportation or storage, thus leading to a break in the cold chain.

[0003] Reversible thermochromic inks or pigments are known in the prior art, which can change color according to temperature changes. However, such inks or pigments are usually highly sensitive to ultraviolet radiation, oxidation, and air contact, and are prone to performance degradation, which limits their reliability and service life in logistics applications. To address these problems, this invention proposes a smart insulated bag, a manufacturing method, and an application. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent insulated bag, a manufacturing method, and an application to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an intelligent insulated bag, characterized in that it includes: The smart insulated bag includes a reversible thermochromic ink or pigment, which can change color according to temperature changes. The reversible thermochromic ink or pigment is printed on the inner surface of a transparent outer layer and protected by a UV-resistant varnish layer.

[0006] Preferably, the reversible thermochromic ink or pigment is formulated to change color when the temperature reaches or exceeds a predetermined threshold (preferably 0°C), thereby visually indicating the interruption of the cold chain.

[0007] Preferably, the smart insulated bag further includes an intermediate heat-insulating layer and an inner layer made of a material suitable for food contact.

[0008] Manufacturing method of smart insulated bags: s1. Print reversible thermochromic ink or pigment on the inner surface of the transparent outer layer; s2. Apply a UV-protective varnish to the ink or pigment; s3. Dry the printed structure; s4. Assemble the layers using composite or heat-sealing methods; s5. Perform final shaping of the insulated bag.

[0009] The use of a smart insulated bag in transporting frozen products is mainly for visual identification of cold chain interruptions.

[0010] Compared with the prior art, the beneficial effects of the present invention are: This invention effectively extends the service life of reversible thermochromic indicators through an anti-ultraviolet protective layer; it can intuitively and reliably indicate whether the cold chain has been interrupted; it has a simple structure and is easy to industrialize; it is suitable for the transportation and storage of various refrigerated or frozen products. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the thermal insulation bag in this invention; Figure 2 This is a cross-sectional schematic diagram of the multi-layer structure of the thermal insulation bag in this invention; Figure 3 This is a schematic diagram of the color change of a reversible thermochromic indicator.

[0012] In the picture: 1. Thermochromic ink / pigment layer; 2. Transparent outer layer; 3. Intermediate layer; 4. Inner layer. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figures 1 to 3 The present invention provides a technical solution: an intelligent insulated bag, comprising... A transparent outer layer with thermochromic ink printed on its inner surface; The transparent outer layer is preferably made of PET, transparent aluminized polypropylene, transparent polyethylene, or polyester material; A thermochromic ink or pigment layer is applied to the inner surface of the transparent outer layer; A UV-protective varnish layer covering the thermochromic ink or pigment layer; A UV-resistant coating protects inks or pigments from degradation caused by solar radiation; A multi-layer thermal insulation structure ensures thermal stability; A reversible indicator that is visible from the outside.

[0015] Smart insulated bags include a reversible thermochromic ink or pigment that changes color in response to temperature variations. The reversible thermochromic ink or pigment is printed on the inner surface of a transparent outer layer and protected by a UV-resistant varnish layer. The reversible thermochromic ink or pigment is formulated to change color when the temperature reaches or exceeds a predetermined threshold (preferably 0°C), thereby visually indicating the interruption of the cold chain. The smart insulated bag also includes an intermediate insulation layer and an inner layer made of a material suitable for food contact, the intermediate insulation layer being preferably polyethylene foam or bubble wrap, and the inner layer being made of a polyethylene material suitable for food contact.

[0016] The manufacturing method of the smart insulated bag includes: s1. Print reversible thermochromic ink or pigment on the inner surface of the transparent outer layer; s2. Apply a UV-protective varnish to the ink or pigment; s3. Dry the printed structure; s4. Assemble the layers using composite or heat-sealing methods; s5. Perform final shaping of the insulated bag.

[0017] Smart insulated bags are mainly used for visual recognition when the cold chain is interrupted. They can be widely used in the transportation and logistics of frozen or refrigerated foods, as well as in any industrial field that requires visual monitoring of product heat exposure.

[0018] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart insulated bag, characterized in that: include The smart insulated bag includes a reversible thermochromic ink or pigment, which can change color according to temperature changes. The reversible thermochromic ink or pigment is printed on the inner surface of a transparent outer layer and protected by a UV-resistant varnish layer.

2. The intelligent insulated bag according to claim 1, characterized in that: The reversible thermochromic ink or pigment is formulated to change color when the temperature reaches or exceeds a predetermined threshold (preferably 0°C), thereby visually indicating the interruption of the cold chain.

3. The intelligent insulated bag according to claim 1, characterized in that: The smart insulated bag also includes an intermediate insulation layer and an inner layer made of a material suitable for food contact.

4. A method for manufacturing the intelligent insulated bag according to any one of claims 1 to 3, characterized in that: s1. Print reversible thermochromic ink or pigment on the inner surface of the transparent outer layer; s2. Apply a UV-protective varnish to the ink or pigment; s3. Dry the printed structure; s4. Assemble the layers using composite or heat-sealing methods; s5. Perform final shaping of the insulated bag.

5. The use of the intelligent insulated bag according to claim 1 in transporting frozen products, characterized in that: Used for visual identification of cold chain disruptions.

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