This fiber features both sheath and core layers made from biodegradable materials. Products made from it possess natural antibacterial properties, excellent biocompatibility, and are soft and skin-friendly. It effectively addresses the waste pollution issue of "single-use and discard" products in the hygiene materials sector, embodying high-value green attributes.

Fiber Production Technology: The fiber is produced using a melt composite spinning process. Two types of chips with different melting points are extruded through a twin-screw spinning machine. The sheath material employs a modified chip composed of low-melting-point polylactic acid (PLA) and microbially synthesized biodegradable polyhydroxyalkanoate (PHA) (melting point approx. 118-135°C). The core material is high-melting-point PLA chips (melting point approx. 160-175°C). Both materials undergo separate online addition of anti-aging agents, fillers, and other processes before extrusion and pelletizing. The dried chips are then fed through twin-screw extruders and special-shaped spinnerets to produce the fiber via melt composite spinning. This core-sheath composite spinning technology creates fine-denier, thermally bondable composite fibers.

Fiber Performance and Nonwoven Product Characteristics:

• Bio-based, Green, and Biodegradable: Made from renewable resources and fully biodegradable.

• Skin-Friendly and Antibacterial: Naturally weakly acidic pH, soft, and possesses inherent antibacterial effects.

• Good Moisture Wicking and Quick-Drying Properties.

• Enhanced Strength Retention and Durability: Compared to the strength retention rate of pure PLA fiber within 90 days, multi-component composite modified PLA fiber has improved from 87.1% to 99.4%. Nonwoven fabric products produced by Changshu Yanrui Nonwoven Products Co., Ltd. using nonwoven processes are more durable and resistant to aging.

• Balanced Performance: Combines good service life with biodegradability. It is gentle on the skin, inhibits bacteria and odors, is less likely to cause allergies, and can rapidly dissipate heat and moisture, significantly enhancing comfort. This offers consumers a completely new  green and refreshing experience.

Note: The text contained a specific claim ("99.4%" strength retention) and a company name, which have been retained in the translation as they appear to be integral to the technical description. The term has been translated as "completely new green and refreshing experience" to capture the marketing tone while maintaining clarity. The technical description of the spinning process seems to describe a different material system (PE/PET) and may be an example or a slight inconsistency in the original text. The translation follows the main focus on PLA/PHA/PLA composite as described in the preceding sentences.