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Heimbach launches 'INTEGRA.XF' fabric machine
05 Jul '06
2 min read
INTEGRA.XF is actually the finest SSB fabric available in the market, and reaches a FSI of 220.
It is a well-known fact that high fibre support is a key influence on sheet quality parameters.
The principal application focus for the development of INTEGRA.XF has been its use on modern high-speed Gapformers. It has, however, also proved its suitability on Fourdrinier and Hybrid formers which already use fine SSB fabrics. It is suitable for the production of all publication grade papers but can equally be applied on newsprint and at a wide variety of special paper - from decor to cigarette tissue.
Designing a new SSB forming fabric leads you to cope with many different requirements. On the one hand we would target an optimal FSI, whilst at the same time the fabric should provide as high a drainage area as possible and, in addition to the high FSI, should still benefit from high dimensional stability.
In order to reach an FSI of 220, the density of yarns had clearly to be increased. In this case, the only way to avoid a negative impact on drainage area would be to significantly reduce the diameter of yarns in both machine and cross-machine directions.
Formerly the use of smaller diameter machine direction yarns would have led to a reduction in dimensional stability, and a risk of excessive stretching. The final consequence of this could be that the fabric would stretch off the paper machine or, due to narrowing, cause poor cross machine sheet properties.
It is a well-known fact that high fibre support is a key influence on sheet quality parameters.
The principal application focus for the development of INTEGRA.XF has been its use on modern high-speed Gapformers. It has, however, also proved its suitability on Fourdrinier and Hybrid formers which already use fine SSB fabrics. It is suitable for the production of all publication grade papers but can equally be applied on newsprint and at a wide variety of special paper - from decor to cigarette tissue.
Designing a new SSB forming fabric leads you to cope with many different requirements. On the one hand we would target an optimal FSI, whilst at the same time the fabric should provide as high a drainage area as possible and, in addition to the high FSI, should still benefit from high dimensional stability.
In order to reach an FSI of 220, the density of yarns had clearly to be increased. In this case, the only way to avoid a negative impact on drainage area would be to significantly reduce the diameter of yarns in both machine and cross-machine directions.
Formerly the use of smaller diameter machine direction yarns would have led to a reduction in dimensional stability, and a risk of excessive stretching. The final consequence of this could be that the fabric would stretch off the paper machine or, due to narrowing, cause poor cross machine sheet properties.
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