Medical nanometer antibacterial composite dressing and method for preparing same

Abstract

The invention relates to a medical nanometer antibacterial composite dressing and a method for preparing the same, wherein the dressing consists of a bacteriostatic functional layer, a water absorbing layer, an adhesive layer and a release paper layer, wherein the bacteriostatic functional layer is prepared by compounding a macromolecular omentum with a nanometer antibacterial material by a self-assembly method, the bacteriostatic functional layer and the water absorbing layer are adhered together through a hot-melt adhesive and are fixed on a non-setting adhesive in the middle of the adhesive layer, the periphery of the release paper layer is adhered and fixed with a rubber layer exposed on the periphery of the adhesive layer, and the middle part thereof is covered on the bacteriostatic functional layer. By making use of a surface grafting method, a nanometer antibacterial agent grows on the surface of the macromolecular omentum to form the firmest chemical bond connection through chemical actions at high temperature and high pressure. The medical nanometer antibacterial composite dressing can effectively absorb redundant water content at a wound and resist the invasion of external bacteria, nanometer particles cannot be aggregated into larger particles easily, and the bacteriostatic effect is good. The medical nanometer antibacterial composite dressing has the advantages of broad spectrum, long-term effect, safety, ultra-strong bactericidal function, and pollution-free and convenient use.

Description

technical field [0001] The invention relates to the technical field of medical material manufacturing, in particular to a medical nano antibacterial composite dressing and a preparation method thereof. Background technique [0002] We know that nano antibacterial disinfection technology is a high-tech antibacterial disinfection method in the 21st century. Inorganic nano antibacterial particles have significant curative effect on wound infection caused by various bacteria, without side effects of drugs, can reduce the use of antibiotics, promote wound healing, and reduce medical costs. Nano antibacterial dressings are gradually used in clinical practice. [0003] At present, there are mainly two loading methods for nano-antibacterial materials: (1) Melt blending method: blending ordinary antibacterial agent powder or masterbatch containing antibacterial agents with ordinary materials, and then obtaining it by extrusion or spinning technology. The disadvantages are: since onl...

AI Technical Summary

Problems solved by technology

The disadvantages are: since only the bactericide on the surface of the antibacterial product works, most of the antibacterial agent is wasted; the antibacterial agent has a great influence on the performance of the material itself; the heat resistance of the antibacterial agent is high; The distribution of the fungicide has a significant effect; it cannot be used for the treatment of finished products

The disadvantage is that the combination of antibacterial agent and material is not firm, and it is easy to peel off during use and lose the antibacterial function. For example, the antibacterial effect will be lost after repeated washing, so that the application range of nano antibacterial materials on dressings is greatly limited. , restricting the wide application of this new type of antibacterial dressing

[0004] At present, medical dressings must be attached to the skin by adhesive tape (such as zinc oxide adhesive plaster), which has many inconveniences in use, and most of them adhere to the wound while absorbing wound exudate, causing damage to the newborn when it is removed. granulation tissue, which delays wound healing

In addition, some dressings use polyolefin materials such as polyethylene film and polypropylene film as backing materials. Due to the non-degradability of these backing materials, white pollution and iatrogenic pollution are caused.

Images