Determining Woven Linen Thread Density and Fabric Weight Adjustments
Determine woven linen weight and thread density by converting yarn Lea to Tex, applying cover factor equations, and accounting for finishing shrinkage.
ISO 3998
Surface Resistance
Hardened textiles undergo testing through iso 3998 to quantify the abrasion resistance of fabric surfaces. This test method defines the number of cycles a material sustains before structural degradation occurs under controlled friction. The document specifies the type of abradant and the applied pressure required to simulate long term wear on finished linen goods.
Wear Mechanism
The procedure involves mounting a circular specimen on a rotating head to contact two abrasive wheels. Each cycle exposes the fabric to cross directional stress that breaks individual filaments in the weave. Operators record the total rotations until a hole appears or the surface experiences a defined mass loss.
Mechanical wear patterns derived from this test distinguish between durable heavy weight industrial linens and decorative lighter fabrics destined for domestic use. Laboratories maintain specific atmospheric conditions to ensure the consistency of fibre tension and lubricant retention during the friction process. Higher cycle counts indicate superior resistance to surface piling and fibre thinning over the lifecycle of the textile.
Acceptance Boundary
Quality control protocols often reference these numerical outcomes to set thresholds for bulk supply contracts. Buyers demand minimum cycle values for institutional linens that endure frequent commercial laundering and high tension handling during the finishing stage. Failure to meet the baseline requirement results in the rejection of the entire lot before the fabric proceeds to the cutting or export phase.
This standard provides the primary metric for verifying that manufacturing processes maintain adequate fibre integrity during the mechanical processing of flax.