CN-122009660-A - Cold accumulation bag with temperature indication function

CN122009660ACN 122009660 ACN122009660 ACN 122009660ACN-122009660-A

Abstract

The invention provides a cold accumulation bag with a temperature indication function, and belongs to the technical field of cold chain transportation. The cold accumulation bag comprises a cold accumulation area and a temperature indication area, wherein the cold accumulation area is filled with a composite phase change material, the temperature indication area is filled with a mixture of the composite phase change material and a temperature indicator, and the composite phase change material comprises a main cold accumulation agent, a thickening agent, a cooling agent, a preservative and water. The cold accumulation bag has high cold accumulation amount and long cold insulation time, and integrates a temperature indication function, so that accurate temperature control and state visualization in a cold chain process are realized. The temperature indication area of the cold accumulation bag can change color when being exposed in an environment exceeding the preset threshold temperature, and can visually display that the temperature of the cold accumulation bag exceeds the standard in the transportation process.

Inventors

TIAN YUANYONG
ZHAO HUI
LU HANG
WANG TIANYU
LU XUEFENG
ZHANG ZHIFAN

Assignees

大连海洋大学

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (9)

1. The cold accumulation bag with the temperature indication function is characterized by comprising a cold accumulation area and a temperature indication area; the temperature indication area is filled with a mixture of the composite phase change material and a temperature indicator; The composite phase change material comprises a main cold storage agent, a thickening agent, a cooling agent, a preservative and water.
2. The cold accumulation package with the temperature indication function according to claim 1, wherein the main cold accumulation agent is glycerol, the thickening agent is water absorbent resin, the cooling agent comprises potassium chloride and/or sodium chloride, and the preservative is potassium sorbate.
3. The cold accumulation package with the temperature indication function according to claim 1 or 2, wherein the content of the main cold accumulation agent in the composite phase change material is 0.5-1.0%, and the content of the thickener in the composite phase change material is 0.1-1.0%.
4. The cold accumulation package with the temperature indication function according to claim 3, wherein the content of the cooling agent in the composite phase change material is 0.1-0.5%.
5. The cold accumulation package with the temperature indication function according to claim 1,2 or 4, wherein the content of the preservative in the composite phase change material is 0.03-0.07%.
6. The cold storage pack with temperature indicating function according to claim 5, wherein the packaging material of the cold storage pack is a polyethylene/polyamide composite film.
7. The cold storage pack with temperature indicating function according to claim 6, wherein the cold storage pack has a plurality of divided liquid storage chambers, and the mixture of the composite phase change material and the temperature indicator is filled into one or more liquid storage chambers to constitute a temperature indicating region.
8. The cold storage pack with temperature indicating function according to claim 4, 6 or 7, wherein the temperature indicator is thermochromic powder.
9. The cold storage pack with a temperature indicating function according to claim 8, wherein the addition amount of the temperature indicator is 0.03-0.07 g/mL.

Description

Cold accumulation bag with temperature indication function Technical Field The invention relates to the technical field of cold chain transportation, in particular to a cold accumulation bag with a temperature indication function. Background With the rapid development of fresh electronic commerce and cold chain logistics, the maintenance of low temperature in transportation is critical to the quality of products. The existing cold storage bag has the defects of (1) limited cold storage quantity and short cold storage time. Water or brine is often used as a cold storage agent, the phase change latent heat is limited, the cold insulation requirement of long-distance and long-time transportation cannot be met, the temperature of the product is increased in the later period of transportation, the quality is deteriorated, and (2) the temperature state is unknown. The current temperature state of the existing cold accumulation bag cannot be visually displayed. The user or the consignee cannot quickly judge whether an overtemperature exceeding standard ("chain breakage") event occurs in the transportation process, and the risk of quality safety hidden danger and rights and liabilities disputes exists, and the function is single. Most cold storage bags only have basic cold insulation function, and lack an integrated monitoring means. The lack of temperature discrimination between the refrigerated and frozen scenes may cause problems such as too low or uneven temperatures in the local area of the cooling object. Therefore, the development of the cold accumulation bag which can keep cold for a long time and indicate the temperature state in real time is of great significance in improving the quality and safety of cold chain logistics. Disclosure of Invention The invention aims to provide a cold accumulation bag with a temperature indication function, which solves the problems that the cold accumulation bag in the prior art cannot keep cold for a long time and cannot indicate temperature. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a cold accumulation bag with a temperature indication function, which consists of a cold accumulation area and a temperature indication area; the temperature indication area is filled with a mixture of the composite phase change material and a temperature indicator; The composite phase change material comprises a main cold storage agent, a thickening agent, a cooling agent, a preservative and water. Preferably, the main cold storage agent is glycerol, the thickening agent is water absorbent resin, the cooling agent comprises potassium chloride and/or sodium chloride, and the preservative is potassium sorbate. Preferably, the content of the main cold storage agent in the composite phase change material is 0.5-1.0%, and the content of the thickener in the composite phase change material is 0.1-1.0%. Preferably, the content of the cooling agent in the composite phase change material is 0.1-0.5%. Preferably, the content of the preservative in the composite phase change material is 0.03-0.07%. Preferably, the packaging material of the cold storage bag is a polyethylene/polyamide composite film. Preferably, the cold accumulation package is provided with a plurality of divided liquid storage chambers, and the mixture of the composite phase change material and the temperature indicator is filled into one or more liquid storage chambers to form a temperature indication area. Preferably, the temperature indicator is thermochromic powder. Preferably, the addition amount of the temperature indicator is 0.03-0.07 g/mL. The invention has the beneficial effects that: The cold accumulation bag has high cold accumulation amount and long cold insulation time, and integrates a temperature indication function, so that accurate temperature control and state visualization in a cold chain process are realized. The cold accumulation bag is provided with the temperature indication area, and when the cold accumulation bag is exposed in an environment exceeding the preset threshold temperature, the temperature indication area can change in color, and whether the temperature rise of the cold accumulation bag exceeds the standard or not can be visually displayed. Drawings FIG. 1 is a physical view of a cold storage pack according to the present invention; FIG. 2 is a schematic color diagram of the temperature indicating region of the cold storage pack at different temperatures; FIG. 3 is a plot of latent heat of phase change and phase change temperature for glycerol solution of comparative example 1 at various concentrations; FIG. 4 is a plot of latent heat of phase change and phase change temperature for a potassium chloride formulated glycerol solution of comparative example 2 at different concentrations; FIG. 5 is a plot of latent heat of phase change and phase change temperature for a calcium chloride formulated glycerol solution of