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| The Effect of Speeds of Jet and Wire on the Physical Properties of Paper Sheets Forming in a Dynamic Sheet Former |
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| DOI：10.11980/j.issn.0254-508X.2014.06.005 |
| Key Words:dynamic sheet former TSO physical properties |
| Fund Project:国家自然科学基金资助项目(31170548，31300491)。 |
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| Abstract:The dynamic sheet former was used to form paper sheets with different jet and wire speeds. The TSO properties of the paper sheets were measured using TSO tester and the apparent density, air permeability and tensile index were determined to study the influence of a change in jet and wire speeds on physical properties both in machine direction (MD) and cross-machine drection (CD) of paper sheets. The results showed that the TSIMD (MD tensile stiffness index) and TSIMD/CD increased while the TSICD decreased with the wire speed increasing, however TSI changed in opposite direction with increasing the jet speed. The tensile strength of paper sheets coincided with the TSI results when changing jet and wire speeds. The apparent density increased slightly and the air permeability greatly reduced as the wire speed increased but the changes were not obvious with changing jet speed. Formation of paper sheets improved with increasing the difference of jet and wire speeds. |
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