CN-122009658-A - 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 thereof. The ink or pigment is printed on the inside surface of the transparent outer layer and is protected by an ultraviolet-proof varnish to prevent degradation thereof under solar radiation. The thermal insulation bag has a multi-layer structure comprising a transparent outer layer, a heat insulation intermediate layer and a food-grade inner layer. The manufacturing process includes inner layer printing, coating with uv-blocking varnish, followed by lamination and assembly. The invention provides a simple, reliable and reusable way for visually monitoring the exposure of frozen products to critical temperatures, thereby improving food safety and logistics management.

Inventors

• Francisco Javier Lhasa Luo Ferei

Assignees

• 凯瑟琳·贝尔坦
• 维克托·拉萨罗·贝尔坦
• 奥斯卡·拉萨罗·贝尔坦

Dates

Publication Date

20260512

Application Date

20260331

Priority Date

20250410

Claims (5)

1. 1. An intelligent thermal insulation bag is characterized by comprising The intelligent thermal insulation bag comprises a reversible thermochromic ink or pigment which can change color according to temperature change, Wherein the reversible thermochromic ink or pigment is printed on the inside surface of a transparent outer layer and protected by an ultraviolet-proof varnish layer.
2. 2. A smart thermal bag as defined in claim 1, wherein said reversible thermochromic ink or paint is formulated to change color when the temperature reaches or exceeds a predetermined threshold (preferably 0 ℃) to visually indicate an interruption of the cold chain.
3. 3. The intelligent thermal insulation bag as set forth in claim 1, further comprising an intermediate thermal insulation layer and an inner layer made of a material suitable for food contact.
4. 4. A method of manufacturing the intelligent thermal insulation bag of any one of claims 1 to 3, characterized in that: s1. printing a reversible thermochromic ink or pigment on the inside surface of the transparent outer layer; S2, applying ultraviolet-proof protective varnish on the ink or pigment; s3. drying the printed structure; s4. assembling the layers by compounding or heat sealing; s5. carrying out final forming on the thermal insulation bag.
5. 5. The use of an intelligent thermal insulation bag for transporting frozen products according to claim 1, wherein the intelligent thermal insulation bag is used for visually identifying cold chain interruption.

Description

Intelligent heat preservation bag, manufacturing method and application Technical Field The invention relates to the technical field of intelligent heat preservation bags, in particular to an intelligent heat preservation bag with an ultraviolet-proof reversible thermochromic indicator. Background The thermal insulation bags are widely used in the transportation of temperature sensitive products, especially in the logistics of frozen and refrigerated foods. However, the prior art thermal insulation bags cannot directly and intuitively judge whether or not a temperature rise occurs during transportation or storage, thereby causing a break in the refrigeration chain. Reversible thermochromic inks or pigments are known in the art, which are capable of color change in response to temperature changes. However, such inks or pigments are generally highly sensitive to uv radiation, oxidation and air exposure and are susceptible to performance degradation, resulting in limited reliability and lifetime in logistical applications, and for this reason, the present invention proposes a smart insulation bag, manufacturing method and application to solve the above problems. Disclosure of Invention The invention aims to provide an intelligent heat preservation bag, a manufacturing method and application thereof, so as to solve the problems in the background technology. In order to achieve the aim, the invention provides the technical scheme that the intelligent heat preservation bag is characterized by comprising The intelligent thermal insulation bag comprises a reversible thermochromic ink or pigment which can change color according to temperature change, Wherein the reversible thermochromic ink or pigment is printed on the inside surface of a transparent outer layer and protected by an ultraviolet-proof varnish layer. Preferably, the reversible thermochromic ink or pigment is formulated to undergo a color change when the temperature reaches or exceeds a predetermined threshold (preferably 0 ℃) to visually indicate interruption of the cold chain. Preferably, the intelligent thermal insulation bag further comprises an intermediate thermal insulation layer and an inner layer made of a material suitable for food contact. The manufacturing method of the intelligent heat preservation bag comprises the following steps: s1. printing a reversible thermochromic ink or pigment on the inside surface of the transparent outer layer; S2, applying ultraviolet-proof protective varnish on the ink or pigment; s3. drying the printed structure; s4. assembling the layers by compounding or heat sealing; s5. carrying out final forming on the thermal insulation bag. The utility model provides an intelligent heat preservation bag is in the use of transportation frozen products, mainly used carries out visual identification to cold chain interruption. Compared with the prior art, the invention has the beneficial effects that: the invention effectively prolongs the service life of the reversible thermochromic indicator through the ultraviolet-proof protective layer, can intuitively and reliably indicate whether the cold chain is interrupted, has a simple structure, is easy for industrial production, and is suitable for transportation and storage of various refrigeration or freezing products. Drawings FIG. 1 is a schematic diagram of the overall structure of a thermal insulation bag according to the present invention; FIG. 2 is a schematic cross-sectional view of a multi-layer structure of a thermal insulation bag according to the present invention; Fig. 3 is a schematic view of a reversible thermochromic indicator color change. In the figure: 1. Thermochromic ink/pigment layer; 2. a transparent outer layer; 3. An intermediate layer; 4. An inner layer. Detailed Description In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention. Referring to FIGS. 1 to 3, the present invention provides an intelligent thermal insulation bag, comprising A transparent outer layer printed with thermochromic ink on an inner side surface thereof; A transparent outer layer, preferably of PET, transparent aluminized polypropylene, transparent polyethylene or polyester material; thermochromic ink or pigment layer arranged on the inner side surface of the transparent outer layer; An ultraviolet protection varnish layer covering the thermochromic ink or pigment layer; An ultraviolet-proof coating to protect the ink or pig