Polylactic acid short fibers are made from fiber grade polylactic acid (PLA) through vacuum drying, screw extrusion melting, spinning, cooling, bunching, stretching, heat treatment, bundle curling, and cutting processes. They are one of the important uses of PLA.
Polylactic acid resin can be formed by ring-opening polymerization of lactide or direct polymerization of lactic acid. Lactic acid can be obtained by fermentation of starch, which comes from a wide range of renewable natural plants such as sweet potatoes, corn, and other grains. The waste of polylactic acid products made from polylactic acid can be decomposed into carbon dioxide and water at a controlled rate in nature, which has very good environmental protection effects. Therefore, as an ideal green fiber, polylactic acid has broad prospects for sustainable development. The development and application of polylactic acid fiber is one of the ways to solve white pollution, with good social benefits and development prospects.
Characteristics of polylactic acid short fibers:
1. Environmental Low Load High Functional Fibers - Polylactic Acid Fibers
Polylactic acid fiber is an ideal high functional fiber with high functionality such as antibacterial, weather resistant, fire resistant, and flame retardant properties. The raw material of polylactic acid fiber is derived from plants. Compared to traditional chemical fibers, it is not only a fully biodegradable low load material in the environment, but also has excellent antibacterial, fire resistant, and weather resistant properties without adding any additives. It can be said that polylactic acid fiber can be regarded as a high-performance fiber with the ultimate intelligent functional literacy.
2. Antibacterial activity (static bacterial activity)
According to the new standard for antibacterial and odor-proof processing of fiber products using Staphylococcus aureus ATCC6538P, polylactic acid fibers were evaluated. The results showed that the static and bactericidal activity values were much higher than the qualified values (static activity values of 2.2 or above). After washing 10 times in advance, or mixing half of natural cotton and other fibers, the antibacterial activity can also be basically maintained. The antibacterial effect of polylactic acid is not only that of Staphylococcus aureus, which serves as a standard bacterium, but also has been confirmed against Gram negative bacteria such as Escherichia coli and Pseudomonas aeruginosa.
3. Characteristics of polylactic acid fiber - fire resistance
By utilizing the raw material characteristics and fiber shape of the depolymerized lactic acid fiber, with polylactic acid fiber as the main material, we have successfully obtained the fire protection product certification from the Japan Disaster Prevention Association. The cotton used for pillows, bedding, cloth dolls, and other products that have been certified as fireproof products this time is a composite short fiber HP8F with useful spontaneous curling ability. Due to the discovery of spiral micro curls, it has excellent fluffiness, cushioning, rebound, and fatigue resistance. This product is expected to have applications in fire safety as a decorative material for bedding, homes, and vehicles, as it is difficult to expand even in the event of a fire compared to polyester fibers, and has low combustion heat and produces less gas.
4. Characteristics of polylactic acid fiber - light and weather resistance
The expert group of Fengyuan Polylactic Acid (Guangdong) Health Industry Co., Ltd. found through experiments that compared with polyester (PET) fibers of the same polyester class, polylactic acid fibers not only have light resistance (Fade Ometer), but also exhibit excellent weather resistance in the Sunshine Weather Meter test accompanied by rainfall. These tendencies have also been confirmed in actual outdoor exposure tests, including polylactic acid fibers and spunbonded nonwovens.
| Length |
Diameter |
Minimum
Pressure
Drop |
Max
Pressure
Drop |
| 120mm |
7.95mm |
190 |
220 |
| 120mm |
7.87mm |
180 |
210 |
| 112mm |
7.87mm |
165 |
195 |
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