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WINEMAKING A digital microscope shows multifilament fiber (from left), a cross-section of cloth fibers from multifilament and a cross-section of cloth with monofilament fibers. the filter is totally blocked before the first clear juice runs off. Filter cloths woven from monofilament yarn offer an alternative. They employ individual round, continuous single-core plastic wire to form the cloth. They have a very smooth surface that can be additionally smoothed on one side. These filter cloths have the further advantage that they are more permeable and thus allow higher flow rates. Filter throughput is typically measured as the air permeability. The air permeability with monofilament cloths is 10- to 30-fold higher than most multi-filament fabrics. Due to the lower thread count per area, there are fewer spaces in which turbid substances can settle. In this type of cloth, it is difficult for turbid particles to lodge, with the effect that the risk of clogging is small and cleaning is very easy. In addition, the discharge behavior of the filter cake is considered by many winemakers to be superior. However, cloths made of monofilament yarn are more fragile. The crack of a single fiber endangers the overall stability of the SEE US AT UNIFIED, BOOTH #1716 After many years of use, multifilament cloth shows surface entanglement due to the use of a pressure washer. Deeper stains were not removed by rinsing with water. tissue and leads to filter bleed-through. In mixed fabrics, the beneficial properties of mono-and multifilament are combined to get the best of both worlds: high flow rates plus good cleaning behavior. Cloths consist of at least two perpendicular or nearly perpendicular crossed-thread systems. The threads are connected via ���yarn crossings,��� which consist of threads woven in patterns containing transverse filaments. The upstream side of the cloth may contain complex connections and a different structure than the downstream facing. Win es & Vin es JA N UA RY 20 13 139