Domestic technical textiles Industry Segment-wise consumption of ...

The demand for these fabrics is primarily driven by paper mills. With the advent of technology
synthetic material is being used to replace wire fabrics.
Product Characteristics
The paper making fabrics are made from polyester and polyamide wires which are woven to produce
the fabric. Paper making fabric should have the following functionalities:
1. Dewatering ability or good drain ability
2. Transferability of wet paper web - transfer wet paper web safely to the next position by
adhering the wet paper web to the felt.
3. Run-ability - avoid undesirable conditions as snaking, deviation, vibration and wrinkling.
4. Wear resistance and resistance to hair shedding
5. Compaction resistance
6. Paper surface smoothness - avoid any felt or roll markings.
7. Uniformity
8. Sustain high speeds of movement on paper making machine
These vary according to the grades of paper, types of paper-making machines and the positions where
the felts are used. In short, each position of the paper-making machine requires different felts.
The different types of paper making felts are as given below:
1. Flow punch - These are single layer Batt-on-mesh (BOM) type felts with a relatively light weight
base fabric which are woven by monofilament and/or twisted monofilament yarns. It is relatively
easy to convert Batt-on-base (BOB) type felts to BOMs. BOM felts are the most widely used.
2. Dual punch - The base fabrics of dual-punch felts are woven by monofilament and/or twisted
monofilament yarns into double layers to make large voids in felt and to resist against high
pressure loadings. Moreover, dual-punch felts are highly efficient for preventing roll markings, so
the felts are widely applicable for various kinds of paper-making machines including ones with
high speed and high pressure loadings.
3. Lamitech punch - Base fabrics of Lamitech-punch felts consist of top and bottom base layers with
different mesh structures woven by monofilament and/or twisted monofilament yarns. The
combinations of the top and bottom base layers are quite plentiful to meet customers' various
requirements. Lamitech-punch felts are generally used at those positions which require high
surface smoothness of paper, high speed and high pressure loadings and those positions where a
large void volume is required for the felts.
4. Aqua punch - Aqua-punch felts feature no knuckle points of warp and weft yarn on the base
fabrics. Therefore, they can maintain quality smoothness under high loadings and are suitable for
positions where a high paper surface finish is required.