MINERAL FIBRE BATTS

MINERAL FIBRE BATTS

A dual density mineral fibre batt has an upper layer having a density of 100 to 300kg m3 intermeshed with a lower layer having a lower density, and wherein each layer is formed of a bonded non−woven mineral fibre network the fibre orientation of which has a Tau value (determined by Fourier Transform...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CLAUSEN ANDERS ULF, JACOBSEN BENT
Format: Patent
Sprache:eng ; pol
Schlagworte:
BRAIDING
COTTON-WOOL
FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS
KNITTING
LACE-MAKING
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL
NON-WOVEN FABRICS
TEXTILES
TRIMMINGS
WADDING
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Beschreibung
Zusammenfassung:A dual density mineral fibre batt has an upper layer having a density of 100 to 300kg m3 intermeshed with a lower layer having a lower density, and wherein each layer is formed of a bonded non−woven mineral fibre network the fibre orientation of which has a Tau value (determined by Fourier Transformation of scanned images of a thickness cross section X) of below 5. Dual density batts may be made by dividing a non−woven web into upper and lower sub­webs and subjecting the upper sub−web to thickness compression and lengthwise compression greater than is required to compensate for the thickness compression, and then subjecting the upper sub−web to lengthwise stretching and or the lower sub−web to lengthwise compression and rejoining the sub−webs and curing the resultant batt.