The origin of dirt and the principle of adhesion on fabrics

Sources of dirt and principles of adhesion to fabrics 1. Sources of dirt
.Produced by the human body itself
Human body secretions produced by the human body itself, such as sweat, secretions, lotion, blood stains, etc. The dirt on the underwear and bedding that people wear mainly comes from human skin secretions and excreta. For example, bedding in hotels, inns and hospitals are usually stained with human body sebum, dander, sweat, secretions, lotion, blood stains, etc.
.Dust in the air
Dust in nature and substances in animals, plants, and minerals, such as soot, oil smoke, dust, gasoline, diesel, and some mineral oils and food oils are produced by incomplete combustion.
The dirt on the outerwear and exposed clothing fabrics worn by people mostly comes from dust and debris in nature.
. Man-made pollution in living and working places
In daily work and life, dirt on clothing also comes from industrial raw materials and chemicals. For example, those who are engaged in mechanical processing and repair work may wear clothing that is prone to ink, dyes, paints, ballpoint pen oil, etc. When using cosmetics, clothing may be prone to stains such as lipstick, nail polish, shampoo or hair dye, etc. Life and work Man-made pollution on the site, such as oil stains, tea stains, rust, paint, etc.
2. The adhesion of dirt on fabrics
There are various forces between dirt and fabrics. The adhesion of dirt on fabrics mainly includes the following types.
.Mechanical adhesion
Mainly solid dirt scattered on the fabric with air flow cloth, mechanically attached to the fiber surface or in the gaps between fibers, and can be removed by mechanical force, but particles smaller than . Remove.
.Electrostatic adhesion
Some fibers in textile fabrics have high resistance values. Static electricity will be generated due to friction during use. For example, when dirt and fabric have opposite electrostatic charges, dirt will be absorbed. On textile fabrics.
.Chemical adhesion
Dirt has undergone chemical changes on the fibers and needs to be removed by chemical methods, such as rust. That is, the chemical agent is used to react with the stain, or the stain is turned into a star-soluble substance, or the chemical reaction of the oxidizing agent or reducing agent is used to make the stain colorless, so as to achieve the removal of the stain.
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