Aeroshield: A film-free nonwoven for soft, quiet, breathable outercovers

Overview

AeroShield is a film-free, three-layer nonwoven outercover technology engineered to deliver liquid barrier performance in a soft, quiet, breathable web. The construction combines a soft outer spunbond layer, a fine-fiber meltblown/bicomponent core, and a reinforcing inner spunbond layer. Unlike conventional film-based outer covers, barrier performance is achieved through tortuous-path fiber architecture combined with a fluorine-free hydrophobic surface treatment — no film layer — which keeps the web soft, drapable, and quiet while resisting liquid strikethrough at approximately 62 mbar hydrohead.

The open pore structure preserves high breathability, supporting moisture vapor transmission and air permeability for enhanced wearer comfort. This technology is well suited for disposable hygiene products, medical garments, and other applications requiring a balance of barrier protection, comfort, and discretion. The modular layer design isolates each performance requirement — softness, barrier, and strength — into a dedicated layer, making the system easy to tune and de-risk.

Technical specifications

Key features:

• Three-layer construction: outer spunbond layer for softness, fine-fiber meltblown/bicomponent core for barrier, inner spunbond layer for strength
• Barrier achieved through tortuous-path fiber architecture plus fluorine-free hydrophobic surface treatment, independent of basis weight or bond density
• Light opacifying additive provides stain masking without adding a barrier layer
• Hydrohead resistance of approximately 62 mbar
• High breathability preserved via open pore structure (WVTR and air permeability)
• Standard spunbond/meltblown processing with finishing-line treatment — no new capital equipment or exotic chemistry
• Target cost under $80/kMSY, avoiding film extrusion overhead

Primary risk: treatment durability under flexing and repeated liquid insult, which is addressable through standard accelerated wear and hydrohead testing during development.

Technology readiness level

The technology is currently at an early development stage (laboratory concept). A structured multi-phase validation plan is in place: materials screening (months 0–2) to narrow fiber and chemistry candidates via lab-scale hydrohead, WVTR, and cup crush testing; pilot-scale trials (months 2–4) on spunbond/meltblown lines to optimize bond patterns and treatment application; full validation (months 4–6) against barrier, breathability, tensile, softness, and noise targets; durability and cost validation (months 6–8) via flex-cycle and aging tests on treatment durability; and production-scale transition (months 8–10) to confirm line compatibility, converting performance, and consumer acceptance.