Medical polyurethane film and preparation method thereof

Abstract

The invention relates to a medical polyurethane film and a preparation method of the medical polyurethane film and belongs to the field of medical plasters. The preparation method of the medical polyurethane film is realized through the following steps that: medical polyurethane is dissolved into tetrahydrofuran, and glycol is added into the prepared saturated polyurethane solution; the obtained polyurethane solution is placed onto a substrate for forming films, and the still standing is carried out until the films are formed; the substrate is a substrate with a plurality of round bulges uniformly distributed on the upper surface; and the substrate and the polyurethane films are simultaneously placed into the ethanol, and the films and the substrate are taken out after the substrate and the films are separated. The polyurethane films prepared by the method have tiny pores, have good waterproof and ventilation characteristics and can be used for manufacturing woundplast and plasters.

Description

Technical field [0001] The invention relates to a medical polyurethane film and a preparation method thereof, and belongs to the field of medical adhesive stickers. Background technique [0002] Medical tapes are disposable medical supplies, the most common are band-aids and plasters. Band-aids, also known as benzalkonium chloride patches, are the most commonly used surgical drugs in people's lives. They have hemostasis and protective effects. Band-aid can compress and stop bleeding, protect wounds, prevent infection, and promote healing. At the same time, it has the advantages of small size, simple use, convenient carrying, good air permeability, and reliable curative effect. However, the adhesive tape used in band-aids has poor air permeability, and the water vapor and sweat normally secreted by the human body cannot penetrate this layer of adhesive tape, so it has a soaking effect on the local skin, which is specifically expressed as local skin wrinkles. Plaster is an ext...

AI Technical Summary

Problems solved by technology

The use period of the plaster is generally 3-7 days. During this period, the medicinal ingredients in the plaster can exert their therapeutic effects. However, due to the long-term coverage of the poorly air-permeable film, most patients have allergic reactions. It is necessary to remove the plaster and reapply the plaster after the allergy is relieved, and it usually takes 2-3 days. During this period, it not only delays the timely treatment of the disease, but also brings unnecessary pain to the patient.

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