Multi-component Composite Modified Polylactic Acid Fiber

2025-04-07News 280

Reasons for recommendation

The fiber” s core and sheath layers are made of biodegradable

materials, and its products are naturally antibacterial, highly

compatible with humans, soft and skin-friendly. It effectively addresses

the issue of “use and throw” in the sanitary materials industry which

leads to waste pollutions, while also having high green value qualities.

Preparative technique

The sheath layer material of the fiber is biodegradable chips (with a melting point of about 118~135℃) modified by low melting point polylactic acid and polyhydroxyalkanoate(PHA) directly synthesized from microorganism. The core layer material is high melting point

polylactic acid chips (with a melting point of about 160~175°C ). Both of them are extruded and pelletized by online addition of anti-aging additives and fillers. After drying, the chips are used to prepare the fiber by composite melt spinning process through twin-screw extruder and profiled spinneret.parallel composite spinning technology is used to produce isomeric composite elastic polyamide fibers.

Features of fibers and finished products

Main Specifications

Stape: 1.8dtexx38mm, 2.2dtexx38mm,1.5dtexX51mm,3.0dtexX51mm

Relative Standards

Low composite staple fiber melting point Polylactide (LMPA)/Polylactide (PLA) bicornporent staple fiber (FZ/T 52058-2021)

Polylactide staple fiber (FZ/T 52041-2015)

Properties of fibers and features of finished products

.Bio-based raw materials, green and environmentally friendly, and

biodegradable.

.Weakly acidic pH, skin-friendly and soft, with natural anti-bacteria

effect.

.Good moisture-conducting and quick-drying properties.

.Improved strength retention, and good durability.

Performance indexes of multi-component composite modified polylactic acid fiber

Specifications	Breaking strength(cN/ dtex)	Elongation at break(%)	Number of crimps(Pcs/25mm)	day breaking strength retention rate (%)	PH	Degradability(%)
1.8dtexx38mm	3.11	40.38%	14	99.40	6.1	100
Fabric (100% this fiber) antibacterial rate (%)			Softness (mN)Hot-air non-woven fabric (100% this fiber)
Staphylococcus aureus	Escherichia coli	Candida albicans	Grammage (g/m)	Longitudinal	Horizontal
96	9	92	89.25	69.5	3.375

The downstream application guidance

Weaving: lt can be used to produce hot-air non-wovens.

Hot-air process: lt is recommended that the initial melting point be set at 129~133°C, and that the production line be set up with zoned temperatures, with low temperatures set for the pre- and post-production stages, and high temperatures set for the middle production stage.

Examples of the downstream applications of multi-component composite modified polylactic acid fiber

Terminal field	Raw material ratio	Fiber specifications	Properties of the product
Hot-air non-woven fabrics	100% multi-component composite modified polylactic acid fiber	1.8dtexX38mm2.2dtexx38mm	lt is applied in the skin-contact layer of sanitary pads,diapers, and disposable pants, and is soft and skin friendly,with quick permeability and breathability

Application of fibers

Industrial textiles：Sanitarynapkins /Disposable pants

Q: What new experiences have multi-component composite modified

polylactic acid fiber products brought to consumers’ lives?

A: The hard hand feel and easy aging of pure polylactic acid fiber products has been effectively solved. The strength retention rate of the multi-component composite modified polylactic acid fiber has risen from 87.1% to 99.4% in 90 days when compared to the strength retention rate of pure polylactic acid fiber.The final product is also more resilient to aging. Long service life,biodegradable qualities, gentleness and skin friendliness, antibacterial and deodorizing properties, non-allergenic properties, rapid heat and moisture dissipation, greatly enhanced comfort, etc., all contribute to giving customers a novel, green and cozy experience.