Spunlace nonwoven fabric — also known as hydroentangled nonwoven fabric — is produced by entangling fiber webs using high-pressure water jets rather than chemical binders or thermal bonding. The result is a fabric with a uniquely soft, textile-like handle, excellent drape, and superior structural integrity. When produced to medical-grade specifications, spunlace becomes one of the most versatile substrates available for wound dressings, surgical covers, and transdermal delivery systems.
Unlike needle-punched or meltblown nonwovens, the hydroentanglement process leaves no chemical residues, making the fabric inherently safer for direct skin and wound contact. This is a critical advantage when regulatory compliance under ISO 10993 (biological evaluation of medical devices) is required.
The performance of a medical spunlace fabric is largely determined by its fiber recipe. The most widely adopted formulation for wound-contact layers is a 70% viscose / 30% polyester (PET) blend — the same specification used by Aojia's medical-series products. Each component contributes distinct and complementary properties:
| Fiber Component | Weight Ratio | Primary Contribution | Clinical Benefit |
|---|---|---|---|
| Viscose (Regenerated Cellulose) | 70% | High absorbency, soft handle, moisture retention | Rapidly absorbs wound exudate; keeps wound bed moist |
| Polyester (PET) | 30% | Tensile strength, dimensional stability, wet integrity | Dressing remains intact during removal; prevents fragmentation |
| 100% Viscose (optional) | 100% | Maximum absorbency, biodegradability | Ideal for heavy-exudate wounds; eco-friendly end-of-life |
| 100% Polyester (optional) | 100% | Maximum strength, chemical resistance | Suitable for industrial medical wipes and surgical drapes |
Technical Note: Pure viscose spunlace absorbs up to 8–10× its own weight in liquid, whereas the 70/30 blend balances absorption with a wet burst strength typically exceeding 150 kPa — ensuring the dressing does not disintegrate when saturated.
Fiber fineness (measured in dtex or denier) also matters significantly. Finer fibers (1.2–1.7 dtex) produce a smoother surface with reduced fiber shedding (linting), which is critical for wound contact layers to avoid introducing foreign material into healing tissue.
Not all spunlace nonwovens qualify for medical use. The following parameters define the technical threshold for wound-care suitability:
Aojia's wound dressing spunlace fabric is available in a weight range of 40–60 g/m² (GSM) and can be slit to widths from 100 mm up to 3,200 mm. This wide dimensional flexibility makes it suitable for both narrow adhesive bandage strips and large wound contact pads, surgical covers, and roll goods for converter processing.
Lower GSM (40 g/m²) products provide a lighter, more conformable layer ideal for adhesive bandage wound contact layers, while 60 g/m² products deliver greater absorbent capacity for moderate-exudate wounds.
Spunlace wound dressing fabrics can be produced in two primary surface configurations:
These are among the most critical mechanical parameters for wound dressings. A dressing that loses structural integrity when wet can fragment, leaving fibers embedded in the wound. Medical-grade spunlace targets:
A critical concern in wound care is the risk of lint contamination — loose fibers shed from the dressing surface that can act as foreign bodies, impeding wound healing and potentially triggering inflammatory responses. Medical spunlace fabrics address this through the hydroentanglement mechanism itself: the high-energy water jets physically interlock fiber ends within the fabric matrix, dramatically reducing free fiber ends at the surface.
The hydroentanglement process creates a three-dimensional fiber network without chemical bonding agents — resulting in fabrics that are inherently lint-free, low-linting, and free from residual binder chemicals, a key requirement for direct wound contact layers under EN 13726 and ISO 9073 test standards.
The uniform texture produced by spunlace manufacturing also contributes to consistent absorbency distribution across the dressing surface — preventing localized saturation that can cause maceration of peri-wound skin.
The combination of softness, absorbency, strength, and biocompatibility makes spunlace nonwoven the substrate of choice across a broad spectrum of medical applications. Aojia's medical series covers the following key end uses:
Primary wound dressings for post-surgical incisions require a material that will not adhere aggressively to healing tissue, yet must maintain positional stability and absorb serous exudate without leaking. Spunlace's smooth surface and controlled porosity fulfill both requirements simultaneously.
In advanced wound care constructions, a perforated or mesh-pattern spunlace layer serves as the innermost wound contact element. Its apertures allow exudate to pass through to a secondary absorptive core while the smooth fiber surface prevents wound ingrowth — a critical property for wounds that require frequent dressing changes.
The spunlace pad at the center of an adhesive bandage must absorb minor wound secretions without bunching, expanding excessively, or shedding lint. The dimensional stability of the 70/30 viscose-PET blend makes it ideal for this precision-cut format.
Spunlace serves as a carrier substrate for drug-impregnated patches (e.g., analgesic, hormonal, or nicotine delivery systems). Its uniform fiber distribution ensures consistent drug loading and release kinetics across the active surface area — a pharmacokinetic requirement that woven gauze or foam alternatives cannot reliably meet.
Spunlace's excellent conformability to curved body surfaces (e.g., the dorsum of the hand for IV line fixation, or the chest wall for cardiac electrodes) reduces patient discomfort and dressing lift-off. The fabric also serves as a carrier for conductive gels in electrode pad systems.
Beyond traditional wound care, medical spunlace fabric is used as the substrate for therapeutic hydrogel masks applied to burns and abrasions. Its high liquid retention capacity allows it to hold and deliver hydrating or medicated gel formulations over extended contact periods.
Explore the full scope of Aojia's medical textile applications in the Medical Series product range.
Medical devices and wound dressings undergo sterilization before use. A substrate fabric must survive the sterilization process without degradation in mechanical or functional properties. Medical spunlace nonwoven is compatible with all three major sterilization modalities:
| Sterilization Method | Compatibility | Technical Consideration |
|---|---|---|
| Ethylene Oxide (EO) Gas | ✅ Fully Compatible | EO permeates the porous structure; adequate aeration post-cycle required to remove residual EO |
| Gamma Irradiation (25–50 kGy) | ✅ Compatible (PET-containing blends preferred) | High viscose content may show slight color shift; mechanical properties remain within specification |
| Steam Autoclave (121°C / 134°C) | ⚠️ Limited (heat-sensitive packaging) | Fabric tolerates steam; limitations arise from the packaging and secondary components of the finished dressing |
| Electron Beam (E-beam) | ✅ Compatible | Similar to gamma; suitable for high-throughput terminal sterilization |
Medical spunlace nonwoven fabric intended for wound care must comply with multiple international standards and regulatory frameworks. Key compliance requirements include:
Zhejiang Aojia Nonwoven Technology Co., Ltd. holds relevant manufacturing certifications and patents for its spunlace product lines. Full details are available on the Patent & Certificates page.
Zhejiang Aojia Nonwoven Technology Co., Ltd., headquartered in Jiaxing City, Zhejiang Province — at the heart of China's advanced materials manufacturing hub — operates an integrated, one-stop spunlace nonwoven production facility. This vertical integration from fiber preparation through final slitting and packaging gives Aojia precise control over product consistency and the flexibility to accommodate custom specifications.
Key customization dimensions available for medical wound dressing spunlace fabric include:
Browse related product categories: Wipes Series · Cosmetology · Base Cloth Series · Wiping Cloth Series
The global medical nonwovens market is projected to reach approximately USD 11 billion by 2027, driven by rising surgical procedure volumes, aging populations, and the shift from reusable to single-use medical textiles in infection control protocols. Within this market, hydroentangled (spunlace) fabrics represent a significant and growing segment, particularly as advanced wound care adoption accelerates in emerging healthcare markets across Asia-Pacific and Latin America.
Key industry trends shaping demand for medical spunlace nonwoven fabrics include:
