Far-infrared fiber is a type of functional fiber. During the spinning process, powders with far-infrared functions are added. These powders include some functional metal or non-metal oxides, such as aluminum oxide, zirconium oxide, magnesium oxide, and biomass carbon, etc. After being crushed to a nano or micro-nano powder level, they are commonly known as far-infrared ceramic powder. After being evenly mixed, they are drawn into yarns. This fiber and its products possess good thermal insulation properties and play a role in medical health care in daily life.

Classification of Far-infrared Fiber

From the perspective of the fiber structure, far-infrared fibers can be divided into two categories. One is a single-component fiber in which the far-infrared powder is evenly dispersed on the cross-section of the fiber-forming polymer. The other is a composite fiber with one or more core layer structures.

From the appearance of the fiber, it can be classified into two types. One is the conventional circular cross-section fiber, and the other is the fiber with an irregular cross-section. Both types of fibers can be made into hollow fibers to enhance the heat preservation effect.

Performance and Application of Far-infrared Fiber

Far-infrared fibers can resonate with water molecules and organic substances, having a good thermal effect. Therefore, far-infrared textiles have excellent thermal insulation properties. Due to the addition of far-infrared radiation materials with a high emissivity, the thermal insulation performance of far-infrared fibers is manifested by utilizing the thermal radiation of living organisms.

They absorb and store the energy radiated from the outside to the organisms, creating a “greenhouse effect” for the organisms and preventing heat loss, thus achieving a good thermal insulation effect. As a result, far-infrared fabrics have a remarkable thermal insulation function and are suitable for making cold-proof fabrics and lightweight winter clothing.

Far-infrared rays can purify the blood, improve skin quality, and prevent bone and joint pain caused by excessive uric acid. The heat absorbed by the skin can reach the body tissues through the medium and blood circulation, promoting human blood circulation and metabolism. It has the functions of eliminating fatigue, restoring physical strength, and relieving pain symptoms, and also has a certain auxiliary medical effect on body inflammations.

Therefore, far-infrared products have a certain effect of improving symptoms and providing auxiliary treatment for diseases caused by blood circulation or microcirculation disorders. They are suitable for making close-fitting underwear, socks, bedding, as well as knee pads, elbow pads, wrist guards, and so on.

In addition, with the continuous development of technology, the application scenarios of far-infrared fibers are gradually expanding. For example, in the field of sports equipment, far-infrared fibers can help athletes better maintain body temperature during exercise, reduce the risk of muscle injuries, and improve athletic performance.

In the medical field, far-infrared products are also being used for the rehabilitation and treatment of some chronic diseases. With the increasing awareness of health care among people, the market demand for far-infrared products is expected to continue to grow in the future.

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