Thin film and preparation technology thereof

Abstract

The invention relates to a medical and cosmetic dressing thin film with high oxygen permeability and a preparation technology thereof. Raw materials of the thin film are common medical rubber materials: silica gel, polyurethane and the like. Single surfaces of two nano dies are respectively coated with rubber material liquid and curing agent liquid; after the two nano dies are respectively subjected to operations of scraping off the excessive liquid and rolling, the liquid coated surfaces of two dies are oppositely stacked; and then rolling, heating, curing and defoaming are carried out to form the thin film with hole arrangement. Mainly, the rolling and heating machining modes are adopted, and thus, cost is greatly reduced, efficiency is improved, and large-scale stable production is facilitated. Compared with the prior art in which nanofibers are prepared by electrostatic spinning and high-pressure airflow and the nanofibers are randomly woven and randomly overlaid to form a thin form, the preparation technology has the advantage that the prepared thin film is of a neatly and uniformly arranged hole nano-structure, and thus, the oxygen permeation rate of the medical thin film isfurther improved. The product prepared by the technology has a wide application prospect in the fields of medical dressings, beauty concealment, flexible electronics, wearable technologies and the like.

Description

technical field [0001] The invention relates to a film with tiny holes and its preparation technology, in particular to a high oxygen permeability film in the field of medical dressings and its preparation process. Background technique [0002] Medical dressings with micro-pore structure can control drug release, reduce side effects, improve drug efficacy, be easy to remove, and develop drug-directed treatment. These are difficult to achieve with traditional medical dressings, and are producing an application technology innovation in the field of medical dressings. . Electrospinning preparation technology and high airflow preparation technology are the common techniques for nanofiber preparation at present. By mixing polymer raw materials with corresponding solvents, applying high voltage or placing them in high airflow, the raw materials can overcome surface tension, etc. Nano-scale or micron-scale fibers are sprayed onto the receiver and then superimposed to form a multi-...

AI Technical Summary

Problems solved by technology

However, in practical applications, there are problems such as irregular holes, high cost, and difficulty in mass production.

[0003] Medical dressings with micro-pore structure is an active technical research hotspot, but the existing technology has not been well applied, especially for such high-end dressings, the market is mostly controlled by foreign manufacturers

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