What Are Nonwovens Standard Procedures (NWSP)?
The Nonwovens Standard Procedures (NWSP) are the global reference for testing, describing, and communicating about nonwoven materials and related products. Jointly developed by INDA (North America) and EDANA (Europe), the NWSPs provide the harmonized technical language and test methods that define the nonwovens industry worldwide.
First published in 2005, the NWSPs are now maintained through a continuous review process, ensuring that updates and improvements are made available online as soon as they are validated—rather than waiting for the next edition.
Why NWSP Matters
-
Defines the industry: Establishes clear specifications for the properties, composition, and performance of nonwovens.
-
Supports global trade: Provides a common technical language across the U.S., Europe, and international markets.
-
Drives consistency: Ensures products can be reliably described, produced, and tested throughout the supply chain.
-
Recognized internationally: Many NWSP methods are adopted by ISO or CEN, further reinforcing global alignment.
How NWSPs Are Classified
Each procedure is numbered in the format:
NWSP 000.0.R0 (15)
-
The first three digits (and decimal) identify the method.
-
“R” indicates the number of revisions since the 2005 launch.
-
The year in parentheses shows the most recent review.
NWSPs also highlight related ISO standards where applicable, allowing companies to decide whether to apply the ISO or NWSP method. Note that ISO and NWSP updates do not occur on the same cycle, and the formats may differ.
Accessing NWSPs
-
INDA Members: Free access to the complete set of NWSP methods.
-
Non-Members: Available for purchase through INDA.
