Manufacturing process of long fiber polyester spunbonded needle punched geotextile

The manufacturing process of long fiber polyester spunbonded needle punched geotextile can be summarized into the following key steps, each step contains detailed process details and key parameters:

1. raw material preparation
Raw material selection: high quality fiber grade polyester chips are selected as raw materials.
Pretreatment: polyester chips are subjected to crystallization and drying treatment to remove moisture and bound water on the surface of the chips, so that the crystallinity of the chips is improved and the water content is reduced to about 30ppm.
 

2. melt spinning
Melt extrusion: The dried polyester chips enter a screw extruder and melt into a polyester melt.
Melt filtration: Remove impurities in the melt through a filter to ensure spinning quality.
Spinning: The melt passes through the spinneret to form a thin melt stream, which is rapidly cooled by the side blowing to form continuous filaments.
Drafting and setting: filament through the high-speed drafting action of the drafting device to enhance the crystallinity and orientation of the monofilament, and then evenly laid on the mesh curtain to form a fiber web.
 

3. acupuncture reinforcement
Laying: the fiber net is evenly laid on the conveyor belt of the needle punching machine.
Needle punching reinforcement: the fiber web is reinforced by needle punching machinery, so that the filaments in the fiber web are entangled with each other to form a needle punched geotextile with certain mechanical and hydraulic properties. The needling process includes two stages of pre-needling and main needling to ensure the stability of the fiber web structure.

Four, winding and post-processing
Winding and forming: the reinforced geotextile passes through the winding device to form a finished roll.
Heat setting treatment (if required): Some products may require heat setting treatment to improve the shape stability and dimensional accuracy of geotextiles.

V. Inspection and Packaging
Quality inspection: The appearance quality, size deviation, strength and other indicators of the finished geotextile are tested to ensure that the product quality meets the standards.
Packing and warehousing: qualified geotextiles shall be packed as required and stored in a suitable warehouse for delivery.

Manufacturing process characteristics
High production efficiency: The spunbond method has a short production process and high production efficiency, which can meet the needs of large-scale production.
Excellent product performance: long fiber polyester spunbonded needle geotextile has high strength, wear resistance, corrosion resistance, water permeability and other excellent properties, widely used in civil engineering, water conservancy engineering, environmental engineering and other fields.
Strong process controllability: In the entire manufacturing process, the process parameters of each link can be accurately controlled to ensure stable and reliable product quality.