Film containing alginate membrane layer and manufacturing method thereof

Abstract

The invention discloses a film containing an alginate membrane layer and a manufacturing method thereof. The method employs a thin layer carrier capable of absorbing liquid, wherein the carrier is made of non-woven fabrics, textures, porous spongy films, plastic films and the like formed from at least one synthetic or natural fiber or polymer. Then, the method employs at least two coating procedures which are separate but continuous in succession to uniformly coat at least one surface of the thin layer carrier with a layer of alginate aqueous solution containing a proper weight percent of sodium alginate or potassium alginate and a layer of salt compound aqueous solution containing a proper weight percent of divalent metal ions such as calcium ions, respectively, to make the alginate cross-linked with the divalent metal ions of the salt compound, so as to form a colloid complexor membrane layer which has a net structure and is water insoluble, on the surface of the thin layer carrier, including on the surface or penetrating more deeply into the inner layer of the surface, thereby producing the film with a membrane layer of alginates such as sodium alginate and with a film carrier in a continuous and fast way in a large amount. When the surface of the thin layer carrier is coarse, the formed alginate membrane layer is combined with the thin layer carrier together; and when the surface of the thin layer carrier is smooth, the formed alginate membrane layer is easy to separate from the thin layer carrier, so as to enlarge the application range of the film.

Description

technical field [0001] The invention relates to a thin film and a manufacturing method thereof, in particular to a thin film containing an alginate film layer and a manufacturing method thereof. Background technique [0002] Alginic acid is a natural polymer that can form various alginates with metal ions in salt compounds and is supplied for commercial purposes. For example, water-soluble sodium alginate can be combined with salts The divalent calcium ion in the compound acts to form insoluble calcium alginate colloid. The main products for commercial use are sodium alginate, potassium alginate, ammonium alginate and other alginate products in different forms, which can be applied to medical skin wound dressings or cosmetic masks. Currently known methods and related technologies for sodium alginate to form colloids include: [0003] (1) Dialysis / diffusion method: the most commonly used method, the sodium alginate aqueous solution is contacted with calcium ions from the ou...

AI Technical Summary

Problems solved by technology

However, the key points or technical features of the above-mentioned prior art mostly belong to the components of the article or the weight percentage (wt%, % by weight) relationship between these components. In fact, these prior technologies do not Did not address the problems or needs in the production of alginate membranes, especially how to maximize the production of the alginate membranes or how to reduce the production cost of the alginate membranes, and proposed effective problem-solving technologies

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