What Are Nonwoven Fabrics?
Nonwoven fabrics are fibrous structures produced without using traditional weaving or knitting processes. The fibers are consolidated through mechanical, thermal, chemical, or hydraulic processes, making it possible to develop versatile materials adapted to the requirements of the medical sector.
In healthcare, nonwovens stand out due to their combination of key characteristics:
- High absorbency
- Softness and comfort in contact with the skin
- Mechanical strength
- Sterility
- Biological safety
These properties make nonwoven fabrics particularly suitable for medical gauze swabs, dressings, surgical drapes, and other disposable medical devices.
Main Types of Nonwovens
Nonwovens can be classified according to the method used to form the fibrous web and the process used to consolidate the fibers.
Web Formation Methods
- Dry-Laid: fibers are opened and mechanically distributed through carding systems.
- Wet-Laid: fibers are dispersed in an aqueous medium, in a process similar to papermaking.
- Spunlaid: filaments are produced directly through continuous polymer extrusion.
Spunlace Technology: Precision and Performance
At ADANW, spunlace is the main consolidation process used in the production of medical nonwovens.
This technology is based on the hydroentanglement of fibers using high-pressure water jets, also known as a waterjet system. This process allows the fibrous structure to be consolidated without the need for chemical binders.
During the process, the fibrous web passes under multiple high-precision injectors, promoting the mechanical entanglement of the fibers and resulting in a uniform, strong, and soft material.
Advantages of Spunlace Technology
- High material uniformity
- Excellent absorbency
- Reduced particle release
- Greater conformability
- Balanced mechanical strength
- Compatibility with sterilization processes
- Greater safety for medical applications
The absence of chemical binders makes this technology especially suitable for products in direct contact with the human body and for applications requiring high levels of biocompatibility.
Quality and Compliance in the Medical Sector
The production of nonwovens for medical devices requires high standards of control and regulatory compliance.
At ADANW, the exclusive focus on the medical sector enables the implementation of rigorous quality control processes, from the selection of raw materials to the final product.
The EN 1644-1 standard establishes the physical and chemical test methods applicable to nonwoven fabrics used in the manufacture of medical gauze swabs. Its main objective is to ensure that the materials provide adequate safety, stability, and performance for contact with the human body.
Tests Defined by EN 1644-1
- Liquid absorption time
- Absorption capacity
- Mechanical strength
- Determination of water-soluble substances
- Fluorescence evaluation
- Determination of acidity or alkalinity
- Evaluation of surfactant substances
Benefits of Compliance
- Safety and suitability for medical use
- Control of the material’s chemical purity
- Production stability and consistency
- Functional performance of medical gauze swabs
- Greater quality control in critical applications
European Manufacturing and Sustainability
Production entirely located in Portugal represents a strategic advantage for the European medical sector, enabling greater proximity, traceability, and control of the supply chain.
In addition to technical rigor, sustainability now plays a central role in the medical device industry. ADANW integrates production practices focused on operational efficiency and reducing environmental impact, aligned with the current demands of the healthcare sector.
Conclusion
The evolution of the medical industry requires materials that are increasingly safe, consistent, and sustainable. Spunlace technology currently represents one of the most advanced solutions for the production of high-performance medical nonwovens, combining comfort, biological safety, and production efficiency.
By combining technical specialization, rigorous quality control, and 100% European manufacturing, ADANW positions itself as a reference partner for medical device manufacturers seeking reliable solutions prepared for the challenges of the future.
