EUROLAB laboratory provides testing and compliance services within the scope of EN 29073-1 standard. This part of the EN 29073 standard specifies the method for determining the mass per unit area of nonwoven fabrics.
Measuring the area and mass of a test piece and calculating its mass per unit area in grams per square metre.
Although non-woven fabrics are classified within the textile industry, it should be accepted that non-woven fabrics have technological features in common not only with textile products, but also with paper and plastic products. There is an International textile test ISO 3801 available. However, to meet the specific needs of nonwovens, alternative requirements to those listed in ISO 29073 are specified in this part of EN 1-3801. These;
The optimum sample size will vary with different nonwovens and should be agreed between the buyer and seller. The size should preferably not be smaller than the specified size due to the anisotropy of various nonwoven fabrics.
Attention is drawn to the fact that the sampling error for nonwoven fabrics may be greater than the test error.
This sampling method recognizes and provides anisotropy (differences in properties along various directions, mainly machine and cross direction) in the final samples. However, these samples are random representatives of the material, and in some cases it may be desirable to investigate systematic variations of properties (including anisotropy) at certain locations, for example across the width or along the length of a given spool. In all these cases, specific provisions must be agreed between the buyer and the seller and recorded in the test report. A procedure for further examination of the variability within a particular batch of material is available and may be found useful in TAPPI T 11-05-74. This publication is available at: The Technical Association of pulp and Paper Industries, 1 Dunwoody Park, Atlanta, Georgia 30338, USA.
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