PLA staple fiber has many excellent properties that are unmatched by other fibers. The following are the main properties of the fiber.

Biodegradability and cyclability of PLA staple fiber: Compared with other synthetic fibers, PLA fiber has the great advantage that it is easily decomposed in the natural environment, carbon dioxide and water generated by decomposition will not pollute the environment, and can pass green plants. The photosynthesis has re-entered the ecological cycle.

PLA staple fiber is non-toxic: PLA staple fiber is synthesized from lactic acid contained in the human body and is relatively safe for the human body. It has been tested that fabric made of PLA fiber will not irritate the skin, has antibacterial and antiseptic properties and is beneficial to human health, and has a comfortable feeling. It is used in underwear and has excellent drape and smoothness compared with PET and PBT fibers. Sexual and shiny. There is no environmental pollution in the fiber synthesis process; the melt spinning method usually used in the fiber production process is simpler and cleaner in the chemical fiber process, and there is no problem of three wastes that are difficult to handle. Polylactic acid fiber has no toxic and side effects in the body, and has certain bacteria resistance and UV resistance. Therefore, it is safe and can be used not only as an absorbable surgical suture and tissue engineering material, but also suitable for outdoor applications and Upholstery fabric. Moreover, the PLA fiber is non-toxic, and the combustion gas does not contain dioxins, and the nitrogen-oxygen gas is also extremely rare.

Low-temperature dyeability of PLA staple fiber: The glass transition temperature of PLA fiber is generally 58-62 ° C. The dye molecules can easily enter the fiber and can be dyed into dark color, so the dyeing performance is better than that of PET fiber, which can be used without carrier. Low temperature dyeing or boiling dyeing.

Resilience and crease resistance of PLA staple fiber: The macromolecular structure of PLA fiber determines its good resilience. Under 5% strain, the rebound rate is 93%. Under 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.

Flame retardant properties of PLA staple fiber: The limiting oxygen index of PLA fiber (26%~27%), close to the regional standard requirements for the limiting oxygen index of flame retardant fiber (28%~30%), low calorific value when burning (PET only) 16% of the fiber), only a slight release of smoke (only 57% of PET fiber), easy to self-extinguish, the fire risk is small. Therefore, the flame retardant properties of PLA fibers have attracted special attention.

UV resistance of PLA staple fibers: C-C, C-H and other bonds in the macromolecular structure of fibers generally do not absorb light with a wavelength greater than 290 nm, and ultraviolet rays that hit the surface of the earth have little effect on fibers containing these bonds [11 ]. The molecular structure of PLA fibers contains a large number of C-C and C-H bonds. Therefore, PLA fibers have excellent UV resistance. PLA fiber is made of high-purity L-lactic acid and contains very little impurities, which is one of the reasons for its excellent UV resistance.

In addition, PLA staple fiber and PET fiber are also hydrophobic and not sticky to the skin; for example, blending with cotton to help the transfer of moisture, dryness when in contact with the skin, and more importantly, the activity of PLA fiber It has good compatibility and does not irritate the skin, so it is especially comfortable when worn. PLA fiber is also very adaptable to the processing, and can adapt to most existing processing equipment such as weaving, knitting, tufting and non-woven fabrics, which provides great convenience for its promotion and application.

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