Temperature-reducing paste and method of manufacturing the same

Abstract

The invention provides a cooling paster that can be reused for limited times. The formulation of said cooling paster comprises polyvinyl alcohol with its polymerization degree being 1350-2050 and weight proportion being 8-20%; ethyl p-hydroxybenzoate with its weight proportion being 0.1-0.5%, and the left is water. It also comprises modified starch with weight proportion being 1-5%, polyvinyl pyrrolidon with weight proportion being 1-10% and proper amount of alginate and edible flavoring. The invention also provides a method for preparing said cooling paster. The invention is characterized by non-toxicity, simple preparation process, long cooling time and reusability.

Description

field of invention [0001] The invention relates to a cooling patch and a manufacturing method thereof, in particular to a hydrogel-type cooling patch capable of limited repeated use and a manufacturing method thereof. Background of the invention [0002] Existing cooling products for reducing fever and fever are divided into two categories: reusable products and disposable products. [0003] Reusable cooling products include traditional ice packs and liquid cooling bags. Traditional ice packs are usually plastic film or tarpaulin bags with one end openable. When used, frozen ice cubes are filled in the bag and applied to the forehead or other parts; Liquid cooling bags are usually closed plastic bags with built-in liquid substances with large specific heat capacity such as ethanol and propylene glycol. They are fixed with head fixing belts. These two kinds of cooling products need to be frozen for a period of time before use, so this kind of product must be used under the c...

AI Technical Summary

Problems solved by technology

However, there are many defects in the existing cooling patch products at present. For example, the cooling time is generally short, generally about 2-3 hours, and it can only be used once, which virtually increases the use cost of patients; most of the existing cooling patches are added by adding Mint, borneol and other traditional Chinese medicine ingredients are used to assist in cooling down. These traditional Chinese medicine ingredients stimulate the nerves of the human body to make people feel cool, but they do not really play a role in lowering the temperature and protecting brain cells, and these medicinal ingredients are harmful to the eyes and wounds. It has a strong stimulating effect, and it is easy to cause inconvenience to patients when used; the existing cooling patch also uses a replica formula containing acrylate, and the substance has been recognized by the World Health Organization as long-term cumulative toxicity once ingested into the human body , so the cooling patch products containing this substance have certain potential safety hazards; on the other hand, the molding process of this kind of polymer hydrogel cooling patch is irradiation cross-linking molding and chemical cross-linking catalytic molding. Irradiation sources are required for forming, and the production conditions are demanding, while the serious shortage of domestic radiation sources limits the mass production of products; chemically catalyzed cross-linking generally requires the addition of cross-linking agent components, which increase production costs, and at the same time The side effects brought by the cross-linking agent in medical products also limit the scope of application of the product; in addition, because the existing cooling patches are used in the form of self-adhesive use, the excessively high viscosity can easily cause skin discomfort for users

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