Softness, the tactile hand feel, is one of the most important properties of tissue paper products... more Softness, the tactile hand feel, is one of the most important properties of tissue paper products such as toilet paper or handkerchiefs. Because this human perception is particularly complex and the interaction of the mechanoreceptors in the skin cannot be fully explained scientifically, an objective evaluation is extremely difficult. Nevertheless, the tissue softness analyser (TSA) is a widely used tool in the tissue industry to measure this property as objectively as possible. A new development of the measuring device makes it now possible to study the production process of tissue paper manufacture in more detail. This was done based on the two industrial production lines with virgin pulp and recycled pulp. As a result, it could be confirmed that the refining process is a critical variable as it has a positive influence on strength and a negative influence on softness. In contrast, thermal drying and the creping process resulted in an increase of softness and a loss of strength. A...
The human perception of softness is an important yet complex property of hygiene tissue paper pro... more The human perception of softness is an important yet complex property of hygiene tissue paper products. Softness is a function of the combination of machine technology, chemical additives, and furnish composition. As a result, it is difficult to investigate the influence of single parameters. Because no completely satisfactory method for determining the softness of furnishes is available at the laboratory scale, the influence of different fibrous materials in combination with their treatment cannot be comprehensively investigated. To work toward this possibility, this publication describes the development of a method to obtain reliable results based on laboratory handsheets using a modified tissue softness analyzer (TSA). With the help of basic statistical methods, a procedure was developed that reproducibly distinguished the influence between softwood and hardwood. To demonstrate the potential of this method, it was tested on an industrial tissue machine and the influence of four d...
Softness, the tactile hand feel, is one of the most important properties of tissue paper products... more Softness, the tactile hand feel, is one of the most important properties of tissue paper products such as toilet paper or handkerchiefs. Because this human perception is particularly complex and the interaction of the mechanoreceptors in the skin cannot be fully explained scientifically, an objective evaluation is extremely difficult. Nevertheless, the tissue softness analyser (TSA) is a widely used tool in the tissue industry to measure this property as objectively as possible. A new development of the measuring device makes it now possible to study the production process of tissue paper manufacture in more detail. This was done based on the two industrial production lines with virgin pulp and recycled pulp. As a result, it could be confirmed that the refining process is a critical variable as it has a positive influence on strength and a negative influence on softness. In contrast, thermal drying and the creping process resulted in an increase of softness and a loss of strength. A...
The human perception of softness is an important yet complex property of hygiene tissue paper pro... more The human perception of softness is an important yet complex property of hygiene tissue paper products. Softness is a function of the combination of machine technology, chemical additives, and furnish composition. As a result, it is difficult to investigate the influence of single parameters. Because no completely satisfactory method for determining the softness of furnishes is available at the laboratory scale, the influence of different fibrous materials in combination with their treatment cannot be comprehensively investigated. To work toward this possibility, this publication describes the development of a method to obtain reliable results based on laboratory handsheets using a modified tissue softness analyzer (TSA). With the help of basic statistical methods, a procedure was developed that reproducibly distinguished the influence between softwood and hardwood. To demonstrate the potential of this method, it was tested on an industrial tissue machine and the influence of four d...
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Papers by Helga Zollner-Croll