Medical moisturizing eye patch and preparation method thereof

A preparation method of a medical moisturizing eye patch, the medical moisturizing eye patch is composed of a protective layer, a gel layer and a backing layer, wherein the gel layer comprises a component A with excellent biocompatibility and a component B with a moisturizing ingredient, and a liquid content of the medical moisturizing eye patch is 90-98%, with a weight per square meter of 800-1500 g/m2;

• the preparation method comprising following steps:
• 1) preparing a component A, comprising:
• stirring a bacterial cellulose wet film in a sodium hydroxide solution for 1-2 h, washing it to neutrality, stirring with a hydrogen peroxide solution at normal temperature for 4-6 h, and washing until the residual hydrogen peroxide is less than 0.5 mg/L, so as to obtain the component A;
• 2) preparing a component B, comprising:
• dissolving glycerol and Nipagin ester uniformly in water bath by heating and stirring;
• adding sodium hyaluronate with molecular weight higher than 500,000 and sodium hyaluronate with molecular weight of 1,000-500,000, stirring at normal temperature for 24 h, adding water to make up 100%, and stirring for 10-20 min, so as to obtain the component B;
• 3) preparing a gel layer, comprising:
• compositing the component A obtained in the step 1) and the component B obtained in the step 2) at a weight ratio of 1:
• 1-1:5, and stirring for 2-4 hours at normal temperature to obtain the gel layer;
• 4) preparing the medical moisturizing eye patch, comprising:
• covering one side of the gel layer obtained in step 3) with a protective layer and the other side with a silica gel film, mechanically pressing the gel layer to be with a water content of 90-98% and a weight per square meter of 800-1500 g/m2, and cutting the gel layer into the eye patch with an appropriate size by using a cutting die.