Which international quality standards (ISO, EN, ASTM) does Narula adhere to?

Compliance with internationally recognized standards is critical for building trust and facilitating global trade, especially in regulated sectors like medical and automotive. Narula Nonwoven maintains in-house testing capabilities and adheres rigorously to ISO and EN standards for both industrial and medical applications. Furthermore, the company can conduct testing to meet specific global regulatory requirements, including Oeko-Tex, RoHs, and REACH standards, which ensure chemical safety and compliance for entry into major international markets.

How does Narula verify barrier performance and filtration efficiency?

Since nonwovens are valued for their functional outcomes, rigorous testing of barrier performance is non-negotiable for critical applications.

• Bacterial and Viral Barrier: Filtration efficiency is quantified using standardized methods, such as the CNS-14775 equivalent, to measure the material’s ability to capture airborne particulates and pathogens. Narula’s testing ensures that meltblown media meets stringent requirements, often demonstrating a Bacterial Filtration Efficiency (BFE) exceeding 95%. Compliance with medical respiratory standards, such as those governing FFP classifications (like EN149), is also ensured.
• Liquid Barrier Integrity: The fabric’s resistance to liquid penetration is measured using hydrostatic pressure tests, such as the synthetic blood penetration test (CNS-14776 equivalent), which verifies that medical PPE maintains barrier integrity under pressures up to 80 mmHg. Narula’s compliance with EN 13795 confirms that its surgical products meet European criteria for essential barrier, strength, and low linting properties.

What tests are performed to ensure the strength, lifespan, and dimensional stability of nonwovens?

Ensuring a nonwoven fabric is fit for its intended use requires thorough testing of its mechanical and physical limits.

• Mechanical Integrity: Testing for tensile strength and elongation is performed in-house. These measurements quantify the stress a fabric can withstand before breaking and its ability to stretch, both of which are vital metrics for durable products like geotextiles and protective clothing.
• Physical Parameters: Air permeability, which measures the rate of airflow through the fabric, is essential for confirming breathability in PPE and filtration efficiency in air filters. Thickness measurement is performed according to recognized methodologies like ASTM D5729 for conventional nonwovens, or ASTM D5736 for high-loft materials, ensuring dimensional specifications are met for insulation or cushioning applications.
• Lifespan: For fabrics designated for outdoor or long-term use, such as crop covers or geotextiles, UV resistance testing is conducted to guarantee the material’s extended service life under continuous environmental exposure.

The consistent use of standardized testing provides quantifiable, objective data, allowing manufacturers to maintain quality assurance across production batches and providing buyers with confirmation of material suitability for critical uses.

 Key Nonwoven Quality Standards & Test Metrics