Interlace Level Measurement and Control
topic
Interlace level measurement counts entanglement nodes per metre by the fork or pin test method where a probe is inserted into the yarn path with slowly increasing tension until each node opens, recorded manually or by automated testing instruments at traversing speeds of 200 metres per minute, with target interlace levels of 40 to 80 nodes per metre for weaving yarns and 5 to 20 nodes per metre for texturing feed yarns requiring stable but easily opened nodes.
Role
Verifies that interlaced yarn meets the cohesion specification for its intended end use by measuring the node density that determines warp integrity during weaving and provides the quality control metric for interlacing machine setting optimisation, with insufficient interlace causing filament fraying and weaving stops while excessive interlace creates over-consolidated yarn that resists spreading during subsequent processing.