Moisture wicking tester manufacturer presents the water absorption and release properties of moisture wicking fibers.

Moisture-absorbing and sweat-wicking fibers use the capillary phenomenon produced by the micro-grooves on the fiber surface to make sweat quickly migrate to the fabric surface and disperse through wicking, diffusion, transmission, etc., achieving thus their objective. moisture conduction and quick drying.

Moisture wicking testerManufacturer Overview: Moisture wicking refers to the manufacture of hygroscopic and quick-drying non-hydrophilic fabrics at the same time. Generally speaking, whether it is natural fibers or synthetic fibers, it is difficult to have both properties, but moisture wicking processing technology can achieve this. Therefore, for the least absorbent polyester fiber, moisture-wicking processing technology gives it new life.

1. E absorption and release propertiesau of moisture-wicking fibers

The moisture-wicking properties of fibers depend on their chemical composition and physical structure form. Gaseous moisture that evaporates from the skin surface is first absorbed by the fibrous material (i.e., hygroscopic), then releases the moisture through the surface of the material; while the liquid moisture on the surface of the skin is formed by the pores (pores, micropores, grooves) inside the fiber and the spaces between the fibers. The capillary effect produced by voids causes the adsorption, diffusion, and evaporation of moisture on surfaces between materials (i.e., moisture release). Both effects lead to water migration. The first effect is mainly linked to the chemical composition of the macromolecules of the fiber, and the second effect is linked to the physical structure of the fiber.

Moisture-absorbing and moisture-wicking fibersperspiration usually have a high specific surface area, with many pores or grooves on the surface, and their cross sections are usually special shaped, using the capillary effect to allow the fiber to quickly absorb moisture and sweat from the sken surface, then spread it and transfer it to the outer layer to bring back the hair.

1. Water absorption of fiber

Moisture-absorbing and sweat-wicking fiber has the characteristics of water absorption. There is a lot of internal and external moisture on the surface of the fibers. The micropores or spaces between the connected fibrils and surface grooves facilitate the penetration of water between the fibers. At the same time, there are many tubular or capillary grooves along the fiber axis, which provide channels for water migration, so that the fiber absorbs water well. ． After absorbing water, it does not swellwill not be due to water absorption like cotton.

2. Drying of the fiber

The moisture of polyester is mainly retained by the fiber by the attraction of a large number of micropore capillaries. , or held mechanically in capillaries between the fibers. At normal room temperatures, moisture is easily transported to the surface of the fibers and evaporates.

2. P.Method for producing moisture-absorbing and sweat-wicking polyester

Because polyester is a highly crystalline fiber. There is no hydrophilic group in the main chain of the molecule, so it is hydrophobic and absorbs moisture and perspiration poorly. Therefore, clothes have poor moisture permeability and are stuffy. There are also various problems caused by easy accumulation of static electricity. A look at the development of moisture-wicking polyestere. It is mainly implemented by physical and chemical modifications, or a combination of both.

1. Specially Shaped Fibers

Changing the shape of die holes is a simple, intuitive and effective method to improve the moisture conductivity of fibers. Many grooves are mainly made in the longitudinal direction of the specially shaped fibers. The fibers wick away moisture thanks to the wicking effect of these grooves. “Coolmax” polyester produced by DuPont in the United States. Its cross section is a flat cross shape and the surface of the fiber has four longitudinal grooves. Second, the surface area is 20% larger than the conventional circular section, so the perspiration performance is higher than that of conventional polyester.

2. Diluted mixture of styrene polymer or composite spinning

Mix the polymer containing a hydrophilic group with copeaux of polyester, and at the same time specially designed special shaped spinnerets are used to produce moisture wicking fibers.

Specially shaped moisture-absorbing and sweat-wicking fibers are formed by combining polyester wafers and hydrophilic polymers with a spun sheath and core. Usually, hydrophilic polymer is used as the core layer of the composite fiber and polyester is used as the skin layer. Hydrophilic polymers are generally polyesters modified with hydrophilic modified polyethers and polyamides. The two components play the role of moisture absorption and conduction respectively. Such composite fibers have the functions of moisture absorption and conduction, achieving the effect of moisture absorption and perspiration.

3. Graft copolymerization

Using the graft copolymerization method, hydrop geneshiles are introduced into the macromolecular structure to increase the moisture absorption and transpiration function of the fiber. . Usually, carboxyl groups, amide groups, hydroxyl groups, amino groups, etc. are used. are introduced to increase affinity for water. Although the raw materials are modified, appropriate spinning processes are also required to give the fibers a porous structure and greater specific surface area.

Judging from the current industrialization of moisture-wicking polyester, physical methods are mainly used to spin three kinds of special-shaped fibers: \"+\", \" Y” and “T”. \". There are also a variable number of micro-grooves on the surface to improve moisture conduction and sweat wicking.

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