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SANKO GOSEI

Glossary: difference between water repellent and hydrophilic and the benefits of each.


Water repellent and hydrophilic both refer to properties that describe how a substance interacts with water.


[Water repellent].


Water-repellent substances repel water. Water droplets do not stay on its surface, but slide down or

or drip in a spherical shape. Typical water-repellent materials include polyester and fluoropolymers. Water-repellent materials are often used in waterproofed clothing, umbrellas and rainwear.

撥水コーティングがされた生地

                Fabrics with water-repellent coating.


Benefits include.


Improved waterproofing: water-repellent materials and processes repel water from the surface of a substance, thus preventing water and moisture from entering. This improves the waterproofing of clothing and outdoor items, protecting them from rain and moisture.


Increased durability: water-repellent materials make it more difficult for water and dirt to adhere to the surface. This means that clothes and furniture are less likely to get dirty and dirt can be easily wiped off.


Maintaining cleanliness: water-repellent materials and finishes make it easier to maintain cleanliness, as dirt and water are less likely to adhere to surfaces. This is particularly beneficial in areas where cleanliness is important, such as kitchen and bathroom surfaces.


Improved weather resistance: water-repellent materials and finishes provide protection against external elements such as wind, rain and sunlight. This improves the weather resistance of building materials and outdoor furniture, enabling them to withstand long-term use.


Improved comfort: water-repellent materials, when used in clothing and bedding, can improve skin comfort by allowing perspiration and body fluids to drain away quickly.


Overall, water repellency contributes to improved performance of various products and materials, providing many benefits such as comfort, durability and cleanliness.


[Hydrophilic].


Hydrophilic materials have the property of attracting water and absorb or adsorb it.

Typical hydrophilic materials include cotton, wood and some metals. Hydrophilic materials contain water and are therefore used as water-holding materials, such as towels, sponges and soil.

スポンジは水を吸収する親水性の例

            Sponges are hydrophilic examples that absorb water.


Advantages include.


Cleaning and sanitisation: hydrophilic surfaces attract water and are therefore less likely to attract dirt and bacteria. This simplifies cleaning tasks and maintains a hygienic environment. This is particularly useful in situations where hygiene is important, such as food processing facilities and medical institutions.


Liquid distribution: hydrophilic surfaces tend to distribute liquids evenly. This property is used in areas such as the uniform application of pigments and adhesives, and in microbiological cultures.


Water purification: hydrophilic materials help to adsorb and purify contaminants in water. This property is used in water filters and environmental purification systems.


Anti-staining properties: hydrophilic surfaces easily exclude dirt and oil, making them useful in situations where cleanliness is required, such as building materials and automotive paintwork.


Self-healing: some hydrophilic coatings have the property of self-healing if the surface is scratched or damaged. This increases durability and extends product life.

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