Paper Machine Forming Fabrics: SSB, 2.5-Layer and Single/Double-Layer Options

A forming fabric influences drainage, sheet support and the interface between the furnish and the forming section. Selection should therefore consider furnish, target basis weight, machine speed, forming geometry, retention objectives, wear conditions and the position within a multi-ply arrangement. This catalog groups the supplied models into SSB triple-layer, 2.5-layer and single- or double-layer families. The listed values are model references supplied for this project; final construction and permeability require confirmation for the actual machine.

SSB Triple Layer2.5-LayerSingle & Double Layer

SSB triple layer: separate sheet-side and wear-side needs

SSB models in the supplied schedule include distinct sheet-side and wear-side constructions. Compare shaft pattern, yarn dimensions, density, caliper, weight where stated, air permeability and strength. A fine sheet-side pattern may be specified for surface support, while coarser wear-side yarns appear in some packaging-grade models. These descriptions are not a promise of a particular formation result or operating life. Review them against furnish, drainage demand and measured wear on the target position.

2.5-layer: balance support, retention and drainage

The 2.5-layer range spans lightweight cultural and specialty papers through heavier packaging grades. The data describes variations in yarn diameter, density, permeability and layer arrangement. Do not select on basis weight alone: furnish composition, forming-board configuration, vacuum elements, speed and retention system can change the appropriate operating window. If a permeability range is supplied, identify the intended target for the specific position. Where data is absent, request the missing specification rather than substituting a value from a neighboring model.

Single and double layer: simpler constructions still need context

Single- and double-layer options may suit specific grade, budget or machine requirements, but construction names do not establish suitability by themselves. Compare sheet-side support, drainage, wear-side yarn design, caliper and the fabric’s dimensional requirements. For single-layer designs, include details about forming elements and the support arrangement. For double-layer designs, clarify which face is intended toward the sheet and what wear conditions are expected.

The information that makes an inquiry actionable

Provide the paper-machine speed, paper grade and basis weight, width, loop length, forming position, current fabric construction, permeability or drainage target, seam details and any known retention or formation constraints. For a multi-ply machine, identify whether the fabric is top, middle or bottom. Include the current model and measured run observations where available. The supplier can then confirm which listed values apply, what remains configurable and which specifications need a technical drawing or written confirmation.

Models in this range