Classification of polyester-cotton blended fabrics? What are the functions of polyester/cotton blended fabrics (fabrics)?
Classification of polyester-cotton blended fabrics? What are the functions of polyester/cotton blended fabrics (fabrics)?
2. The principle of antibacterial, moisture-absorbing and sweat-wicking finishing
(1) Moisture-absorbing and sweat-wicking fabric (fabric) finishing
Moisture-wicking fabric (fabric) finishing, as the name suggests, is to make the fabric both absorbent and quick-drying.
(a) Water absorption of fiber
The fibers of moisture-wicking fabrics (cloths) are water-absorbent. The surface of the fiber has many micropores or fibril gaps and surface grooves that communicate internally and externally, making it easy for moisture to enter between the fibers. At the same time, there are many tubular grooves or capillaries along the fiber axis, which provide channels for water migration, so the fiber has good water absorption. After absorbing water, it will not swell due to water absorption like cotton.
(b)Quick-drying properties of fiber
The moisture between polyester fibers mainly relies on the attraction of a large number of microporous capillaries to be held by the fibers, or is mechanically maintained in the capillaries between the fibers. At normal ambient temperatures, the moisture is easily transported to the fiber surface and evaporates.
The fibers of moisture-absorbing and sweat-wicking fabrics (cloths) generally have a high specific surface area, with numerous micropores or grooves on the surface. The cross-sections are generally special shaped. The capillary effect is used to enable the fibers to quickly absorb moisture and sweat from the skin surface. , through diffusion and transfer to the outer layer for evaporation.
The moisture wicking properties of fibers depend on their chemical composition and physical structure. The gaseous moisture that evaporates from the skin surface is first absorbed by the fibrous material, a process we call hygroscopicity. Moisture is then released through the surface of the fiber material, and the liquid moisture on the skin surface is adsorbed, diffused and evaporated on the surface between the fiber materials due to the capillary effect produced by the capillaries, micropores, grooves inside the fiber, and the gaps between the fibers. , this process is a dehumidification process. The two processes result in water migration. The former is mainly related to the chemical composition of the fiber macromolecules, and the latter is related to the physical structure of the fiber.
The general principle of finishing wicking fabrics (fabric) is to introduce hydrophilic groups into the macromolecular structure through grafting or copolymerization methods to increase the fiber’s moisture wicking function. Usually, carboxyl groups, amide groups, hydroxyl groups, amino groups, etc. are introduced to increase the affinity for water molecules and give the fiber a porous structure and a larger specific surface area.
Generally speaking, since cotton is a hydrophilic fiber and has good water absorption, polyester fiber is a hydrophobic fiber and does not have a hydrophilic group, so it has poor hygroscopicity. Determining the hygroscopicity of fibers is a basic evaluation method for moisture-wicking fabrics. Hygroscopicity indicates a fabric’s ability to absorb water, while wicking indicates a fabric’s ability to dry. According to the functional requirements of moisture absorption, antibacterial and deodorant, we use the moisture wicking finishing agent SW and the antibacterial and deodorizing finishing agent SCJ-891 produced by Beijing Jiershuanggao, using the polyester fiber and the hydrophilic copolymer to undergo a crystallization reaction to form on the fiber surface. The hydrophilic layer maintains the good moisture conductivity of the polyester fiber, thereby improving the wearing comfort of the fabric, reducing electrostatic adsorption on the garment, and can be washed repeatedly. The finished polyester-cotton fabric has the following functions:
(a) Sweat-absorbent and breathable: The finished fabric has excellent sweat-absorbent properties, good air permeability, excellent wearability, moisture absorption and quick drying, and can quickly guide sweat and moisture away from the skin surface, which can eliminate the dryness, airtightness and non-breathability of synthetic fiber fabrics. Disadvantages such as sweat absorption.
(b) Hydrophilic and antistatic properties: The finished fabric has excellent hydrophilicity, good antistatic properties, small electrostatic effects, is not easy to absorb dust, has certain antifouling properties, and is easy to wash.
(c) Softness: The finished fabric is soft and smooth, comfortable to the touch and elegant in style.
(2) Antibacterial and deodorant fabric (fabric) finishing
The fabric after SCJ-891 antibacterial finishing has obvious antibacterial, anti-inflammatory, deodorizing, anti-mildew, anti-itching and astringent effects. The antibacterial and deodorizing finishing agent SCJ-891 can be dyed inside the fiber at high temperatures and can be carried out in the same bath as the dyeing. The fabric has good wearing properties and excellent washing fastness.
Antibacterial and deodorant embedding agent SCJ-891 is an organic antibacterial agent. It has the following characteristics:
(a) Highly effective: only a small amount is needed to provide excellent antibacterial effects.
(b) Highly strong: SCJ-891 can be fixed inside the fiber and protected by the fiber, thereby providing excellent functionality and wash fastness.
(c) Fresh and durable: Research results show that the use of SCJ-891 can reduce the generation of bad odors in textiles.
(d) User safety: The antibacterial agent contained in SCJ-891 has been used in cosmetics and household products for more than ten years and has been proven to be safe, reliable and harmless to the skin.
(e) High dye uptake rate: safe for the environment. XXY6fqhR
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