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CN-122005197-A - Hot compress bag capable of preventing self-activation and preparation method thereof

CN122005197ACN 122005197 ACN122005197 ACN 122005197ACN-122005197-A

Abstract

The application relates to the technical field of hot compress bags, in particular to a hot compress bag for preventing self activation and a preparation method thereof, wherein sodium thiosulfate pentahydrate, sodium acetate trihydrate and deionized water form a ternary phase change material together, compared with a single-component phase change material, the newly formed ternary phase change material has lower eutectic point, the phase change material can be kept at a lower temperature without phase change, and the thickening agent is added in the ternary phase change material, dispersed in the phase change material, so that the system stability of the phase change material is improved, and meanwhile, intermolecular hydrogen bonding acting force of the phase change material can prevent crystallization in the cooling process, so that the system can be kept at a lower temperature without phase change.

Inventors

  • XU JIA
  • Guo Kechun
  • LI YIJUN
  • XIAO MEI

Assignees

  • 江苏英科医疗制品有限公司

Dates

Publication Date
20260512
Application Date
20251215

Claims (10)

  1. 1. A self-activated prevention hot compress bag, characterized in that the hot compress bag comprises a phase change layer, and a sealing bag filled with phase change fluid and an initiating material is arranged in the phase change layer; the preparation method of the phase-change fluid comprises the following steps: uniformly mixing sodium thiosulfate pentahydrate, sodium acetate trihydrate and deionized water, heating in a closed manner for 20-30 min in a water bath at 70-80 ℃, continuously oscillating in the heating process to enable the sodium thiosulfate pentahydrate, the sodium acetate trihydrate and the deionized water to be fully melted, then heating to 80-90 ℃, adding a thickening agent, uniformly stirring, performing ultrasonic dispersion for 5-15 min, sealing the mixed liquid after the dispersion is completed, rapidly transferring the mixed liquid to an environment at-20-30 ℃, and fully cooling to room temperature to obtain the phase-change fluid.
  2. 2. The self-activation-preventing hot compress bag according to claim 1, wherein the thickener is a mixture obtained by mixing glycerol with one of polyvinyl alcohol, maleic acid, polyacrylamide and carrageenan, the mass fraction of the thickener in the phase-change fluid is 20-30%, and the mass fraction of the glycerol in the thickener is 80-90%.
  3. 3. The self-activation-preventing hot compress bag according to claim 1, wherein the mass ratio of sodium sulfate pentahydrate, sodium acetate tri-hydrate and deionized water is (50-60): 30-40): 5-10.
  4. 4. The self-activation-preventing hot compress bag according to claim 1, wherein the low temperature phase change microcapsule layer is arranged outside the sealing bag, and the preparation method of the low temperature phase change microcapsule comprises the following steps: Mixing n-tridecane, styrene and methyl methacrylate, uniformly stirring at room temperature and 400-500 rpm, adding benzoyl peroxide, and continuously stirring for 5-10 min to obtain an n-tridecane mixed solution; Mixing polyvinyl alcohol, tricalcium phosphate and deionized water, stirring for 5-10 min at 80-90 ℃ and 400-500 rpm, and fully dissolving to obtain a polyvinyl alcohol solution; And adding n-tridecane mixed solution into the polyvinyl alcohol solution at 50-60 ℃, preserving heat for 10-20 min at 50-60 ℃, then heating to 80-90 ℃, reacting for 4-6 h at 80-90 ℃, cooling to room temperature after the reaction is finished, washing with deionized water, and drying to obtain the low-temperature phase-change microcapsule.
  5. 5. The self-activation-preventing hot compress bag according to claim 4, wherein the mass ratio of n-tridecane, styrene, methyl methacrylate and deionized water is (35-40): 5-10): 10-15): 70-90.
  6. 6. The self-activating prevention hot pack of claim 1, wherein the initiating material is a metal sheet or a metal powder.
  7. 7. The self-activation prevention heat pack of claim 6, wherein the metal powder is one or more of iron powder, copper oxide powder, iron oxide powder, ferrous oxide powder, aluminum oxide powder.
  8. 8. The self-activation-preventing hot compress bag according to claim 1, wherein an insulation layer is arranged outside the phase change layer, and the insulation layer is made of polyethylene foam or ethylene propylene diene monomer foam, and has a thickness of 1-3 mm.
  9. 9. The self-activation-preventing hot compress bag according to claim 1, wherein the outermost layer of the hot compress bag is a protective layer, and the protective layer is made of one or more of polyethylene non-woven fabric, polypropylene non-woven fabric, polyvinyl alcohol non-woven fabric, polylactic acid non-woven fabric and polyimide non-woven fabric.
  10. 10. A preparation method of a hot compress bag for preventing self activation is characterized by comprising the steps of taking a sealing bag, filling phase-change fluid and initiating materials into the sealing bag and sealing the sealing bag, then filling the sealed sealing bag into a large sealing bag which is pre-filled with low-temperature phase-change microcapsules, adjusting the position of the sealing bag in the large sealing bag and sealing the large sealing bag to form a phase-change layer, then adhering heat insulation materials on two sides of the phase-change layer to form a structure with heat insulation layers on two sides of the phase-change layer, finally filling the sealing bag into a bag formed by two protective layer materials together, and forming a protective layer structure outside the heat insulation layer to obtain the hot compress bag for preventing self activation.

Description

Hot compress bag capable of preventing self-activation and preparation method thereof Technical Field The invention relates to the technical field of hot compress bags, in particular to a hot compress bag capable of preventing self-activation and a preparation method thereof. Background The hot compress is a common physiotherapy, and by introducing heat energy into the body, the capillary vessel of the hot compress part is dilated, and local blood circulation is promoted, so that the effects of relieving muscle spasm and promoting inflammatory absorption are achieved. Compared with a reusable hot compress bag, the disposable hot compress bag has the advantages of no need of heat accumulation in advance, convenient use, low price, cleanness, sanitation and the like, but the common problem of the disposable hot compress bag is that the hot compress bag can be activated in advance in the transportation and storage process due to impact, low temperature and the like, wherein appearance packaging or internal sealing of the hot compress bag which is activated in advance due to the influence of external force such as impact or puncture is damaged, transportation and sales personnel can easily separate the hot compress bag from the normal hot compress bag, storage and sales of the normal hot compress bag are not influenced, but the hot compress bag which is influenced by the low temperature and activated in advance is not damaged due to the appearance packaging, and the transportation and sales personnel can sell the hot compress bag and the hot compress bag which can be used normally to consumers together, which can definitely bring bad consumption experience to the consumers, so that the quality and the mouth piece of a brand of a product are influenced. Disclosure of Invention The invention aims to provide a self-activation-preventing hot compress bag and a preparation method thereof, which solve the problems that the hot compress bag is easy to activate in advance at low temperature and is difficult to store. In order to solve the technical problems, the invention provides the following technical scheme: A self-activating prevention thermal pack comprising a phase change layer comprising a sealed pack containing a phase change fluid and an initiating material; the preparation method of the phase-change fluid comprises the following steps: uniformly mixing sodium thiosulfate pentahydrate, sodium acetate trihydrate and deionized water, heating in a closed manner for 20-30 min in a water bath at 70-80 ℃, continuously oscillating in the heating process to enable the sodium thiosulfate pentahydrate, the sodium acetate trihydrate and the deionized water to be fully melted, then heating to 80-90 ℃, adding a thickening agent, uniformly stirring, performing ultrasonic dispersion for 5-15 min, sealing the mixed liquid after the dispersion is completed, rapidly transferring the mixed liquid to an environment at-20-30 ℃, and fully cooling to room temperature to obtain the phase-change fluid. The invention is further limited, the thickener is a mixture obtained by mixing one of polyvinyl alcohol, maleic acid, polyacrylamide and carrageenan with glycerin, the mass fraction of the thickener in the phase-change fluid is 20-30%, and the mass fraction of the glycerin in the thickener is 80-90%. As a further limitation of the invention, the mass ratio of the sodium sulfate pentahydrate, the sodium acetate trihydrate and the deionized water is (50-60): 30-40): 5-10. As a further limitation of the invention, a low-temperature phase-change microcapsule layer is arranged outside the sealing bag, wherein the preparation method of the low-temperature phase-change microcapsule comprises the following steps: Mixing n-tridecane, styrene and methyl methacrylate, uniformly stirring at room temperature and 400-500 rpm, adding benzoyl peroxide, and continuously stirring for 5-10 min to obtain an n-tridecane mixed solution; Mixing polyvinyl alcohol, tricalcium phosphate and deionized water, stirring for 5-10 min at 80-90 ℃ and 400-500 rpm, and fully dissolving to obtain a polyvinyl alcohol solution; And adding n-tridecane mixed solution into the polyvinyl alcohol solution at 50-60 ℃, preserving heat for 10-20 min at 50-60 ℃, then heating to 80-90 ℃, reacting for 4-6 h at 80-90 ℃, cooling to room temperature after the reaction is finished, washing with deionized water, and drying to obtain the low-temperature phase-change microcapsule. As a further limitation of the invention, the mass ratio of the n-tridecane, the styrene, the methyl methacrylate and the deionized water is (35-40)/(5-10)/(10-15)/(70-90). As a further limitation of the present invention, the initiating material is a metal sheet or a metal powder. As a further limitation of the present invention, the metal powder is one or a combination of more of iron powder, copper oxide powder, iron oxide powder, ferrous oxide powder, and aluminum oxide powder. As a further limitation of the