Cross-Lapper Technology and Web Layering
topic
Cross-lappers receive the carded web from the card delivery and lay it in overlapping diagonal layers across a conveyor moving perpendicular to the card delivery direction, with the number of layers from 4 to 20 determining the final web weight as a multiple of the single card web weight, and the cross-lapping angle and conveyor speed ratio determining the fibre orientation balance between machine direction and cross-direction in the layered web.
Role
Builds the multi-layer web of defined weight and fibre orientation from multiple thin card web layers by controlled cross-laying that simultaneously increases web weight and improves cross-direction strength through the diagonal fibre orientation of each cross-laid layer, with cross-lapper speed coordination with card output and subsequent bonder feed being the critical production parameter governing web weight consistency.