PLA fiber has many excellent properties that other fibers cannot match. The following are the main properties of the fiber.

The biodegradability and cyclability of PLA fiber: Compared with other synthetic fibers, the biggest advantage of PLA fiber is that it is easily decomposed in the natural environment. The carbon dioxide and water produced by decomposition do not pollute the environment and can pass through the green plants. Photosynthesis has once again entered the ecological cycle.

The non-toxicity of PLA fiber: PLA fiber is synthesized with lactic acid contained in the human body and is absolutely safe to the human body. Fabrics made with PLA fibers have been tested to not irritate the skin, have antibacterial and antiseptic properties and are beneficial to human health, and have a comfortable feel. They are used in underwear and have excellent drape and smoothness compared to PET and PBT fibers. Sexual and shiny. The fiber synthesis process has no environmental pollution; the fiber production process usually adopts the melt spinning method which is the simplest and cleanest in the chemical fiber process, and there are no three waste problems that are difficult to handle. Polylactic acid fiber implants have no toxic and side effects, and they have certain bacteria resistance and UV resistance. Therefore, they are safe and can be used not only as absorbable surgical sutures and tissue engineering materials, but also suitable for outdoor applications and applications. Interior fabric. Furthermore, PLA fibres are non-toxic and do not contain dioxins in the combustion gases. Nitrogen-oxygen gases are also minimal.

Low-temperature dyeability of PLA fiber: PLA glass fiber generally has a glass transition temperature of 58-62°C, dye molecules easily enter the fiber interior and can be dyed darker, so its dyeing performance is better than that of PET fiber, and can be used without a carrier. Press low temperature dyeing or boiling dyeing.

The elasticity and wrinkle resistance of PLA fiber: The macromolecular structure of PLA fiber determines its good resilience. Under the 5% strain, the rebound rate is 93%. Under the effect of 10% strain, the rebound rate is 64. %; while the PET fiber has a rebound rate of 63% under 5% strain, and the rebound rate is 51% under 10% strain.

The flame retardancy of PLA fiber: The limiting oxygen index of PLA fiber (26%-27%) is close to the national standard's requirement for limiting oxygen index of flame-retardant fiber (28%～30%), and the heat value is low when burning (PET only 16% of the fiber) is only slightly smoke released (only 57% of PET fiber), easily extinguished, and has a low risk of fire. Therefore, the flame retardancy of PLA fibers has attracted special attention.

UV-resistance of PLA fiber: C—C, C—H, etc. in the macromolecular structure of the fiber generally do not absorb light with a wavelength greater than 290 nm, and the ultraviolet rays radiated to the surface of the earth have almost no effect on the fibers containing these bonds.[11] ]. The molecular structure of PLA fiber contains a large number of C-C and C-H bonds. Therefore, PLA fiber has excellent UV resistance. PLA fibers are made of high-purity L-lactic acid and contain very few impurities, which is one of the reasons for their excellent UV resistance.

In addition, PLA fiber and PET fiber are also rich in hydrophobicity and not sticky to the skin. For example, underwear made of blended cotton and cotton can help transfer moisture. When it touches the skin, it has a feeling of dryness. More importantly, PLA fibers are biological. The compatibility is good, does not irritate the skin, so the comfort when wearing is particularly good. The processing flexibility of PLA fiber is also very good. It can adapt to most of the existing processing equipment such as woven, knitted, tufted and non-woven fabrics, which provides great convenience for its popularization and application.

Because of these unique and outstanding properties, PLA fiber has a good market prospect, a wide range of applications, and has contributed to the protection of the environment.