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Continuous Filament Spunbond Needle-punched Underbody Shield Production Line
Process Principle
PET sheet melt spinning → continuous filament air stretching → swaying filament laying → pre-needling + main needling for consolidation → heat setting → edge trimming and winding, obtaining three-dimensional filament needled felt, and delivering it to the molding process to manufacture battery underbody shield plates.
Production Line Equipment Composition
Raw material transportation and drying system: PET sheet storage bin, transportation, crystallization drying (PET must be fully dried to prevent filament breakage during spinning)
Extrusion and melt filtration: Screw extruder, melt filter, static mixer, ensuring stable melt pressure and temperature
Air stretching system: Slit/tube high-speed air stretching, stretching filaments to enhance fiber orientation and strength (core unit for underbody shields)
Cooling + swaying filament laying device: Side wind cooling with swaying mechanism that randomly lays filaments into an even fiber net, controlling surface density uniformity
Needling unit (pre-needling + main needling): Pre-needling for initial entanglement and fiber net fixation; main needling for high-density needling to enhance thickness, tear resistance, and puncture resistance
Heat setting machine: Eliminates internal stress, stabilizes dimensions, and controls molding shrinkage rate (critical for battery shield plates)
PET / COPET dual-component options (dual-component offers better toughness and molding performance)
Finished Product Weight
600~2000 g/㎡ (common range for underbody shields)
Working Width
3.0m (mainstream, customizable)
Single Filament Fineness
5.0~6.0 dpf
Production Line Speed
5~50 m/min
Annual Production Capacity
Up to approximately 4000 tons/year
Product Characteristics
High impact resistance, heat resistance, sound absorption and noise reduction, strong molding deformation ability, 100% recyclable
Product Features (Battery Underbody Shield Substrate)
Three-dimensional filament structure provides higher longitudinal and transverse strength, superior tear resistance, and better stone impact resistance compared to short-fiber needling, offering comprehensive protection for battery pack bases
Porous structure combines insulation with sound absorption properties
Excellent thermal stability reduces cracking risk during molding processes
Lightweight design replaces some metal shield plates, contributing to vehicle weight reduction
Environmentally friendly and fully recyclable, meeting new energy vehicle material requirements
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
1986
Total Annual:
10000000USD-15000000
Employee Number:
100~120
Ecer Certification:
Verified Supplier
Changshu Mingyi Non‑woven Machinery Co., Ltd is a supplier specializing in non‑woven machinery, non‑woven fabrics and technical solutions. It boasts an independent R&D team and manufacturing system, adopting China’s leading oven integration technology. With nearly 40 years of exper...
Changshu Mingyi Non‑woven Machinery Co., Ltd is a supplier specializing in non‑woven machinery, non‑woven fabrics and technical solutions. It boasts an independent R&D team and manufacturing system, adopting China’s leading oven integration technology. With nearly 40 years of exper...