Cotton is the flower of plants. Plants will produce fat in the process of growth, so cotton and cotton seeds can shelter from rain and prevent premature germination of seeds. However, medical cotton must be degreased because the presence of fat reduces the water absorption capacity of cotton, and liquid drugs cannot be absorbed by cotton. Secondly, fat is also contaminated by bacteria. This requires that medical cotton must be degreased. The main methods of cotton degreasing are alkali washing and steaming, such as washing with caustic soda water, washing with clean water, and steaming again with steam.
Dry cotton ball is a kind of sanitary product, also used to make nitrocellulose, also known as medicated cotton. Now? Medical cotton ball Its full name is "medical dry cotton ball". A medical dry cotton ball in the world is produced by the German medical brand Boehmann. PAUL HARTMANN AG was founded in 1818 by Ludwig von Hermann, a German, and was one of the largest cotton mills in Germany at that time. Paul Herman, the son of Ludwig von Herman, transformed the new concepts and technologies that appeared at that time into practical applications, and successfully transformed Portman from a cotton textile enterprise to a medical dressing enterprise, which greatly changed the face of modern wound care management. In 1873, German Victor von Bruce invented a method to remove fat from cotton, which is known as "a major turning point in the development of global wound care". At that time, Paul Hermann immediately cooperated with Victor von Bruce to open the "door of global cotton short staple medical dressings" by means of industrial production. Soon, German doctors found that the quality of the dry cotton balls produced by Boehmann was better than other medical cotton balls on the market. It can better absorb the patient's exudates and blood. It can not only be used to disinfect patients' skin, but also be used to treat wounds and apply liquid medicine. Since then, medical dry cotton balls have been gradually transferred from Germany to Europe and promoted all over the world. It is made of a variety of materials, with a diameter of 1 cm to 1.9 cm, and connected with cotton thread (drawstring) at the end. The radian of the dry cotton ball end varies from manufacturer to manufacturer, and users can choose according to their own usage habits. There are usually linear or twill indentations on the main body of the dry cotton ball, which can increase the conductivity of the dry cotton ball, and can cooperate with the tunnel wall when absorbing the menstrual blood. Conduit type dry cotton balls are attached with paper or plastic conduits, which is convenient for users to import dry cotton balls. The overall structure of conduit is divided into outer tube and inner tube. The surface of the outer tube is smooth, and the front end is round for easy insertion. The front end of the outer tube has a petal shaped opening. The function of the inner tube is to push the dry cotton ball out of the opening of the outer tube flap by piston pushing.
Tamping method: two drops of water indicate that the absorbance is between 6 and 9 grams. Like dry cotton balls, dry cotton balls have different absorption rates. Since the absorption rate of dry cotton balls is considered to be related to female toxic shock syndrome, the US Food and Drug Administration (FDA) clearly defined the absorption rate standard of dry cotton balls after 1988.
