Embossing Lines and Dots Geometry Effect on the Key Tissue Paper Properties with Finite Element Method Analysis

Area of Science:

• Materials Science
• Paper Engineering
• Surface Science

Background:

• Embossing is crucial for multi-sensory tissue paper properties.
• It involves altering sheet surface topography using compressive dies.
• Understanding the impact of engraving finishing geometry is key.

Purpose of the Study:

• To investigate how engraving finishing geometry affects tissue paper properties.
• To compare the effects of straight versus round finishing geometries.
• To correlate experimental findings with finite element modeling.

Main Methods:

• Experimental analysis of tissue paper properties (hand-feel, softness, bulk).
• Liquid droplet spreading kinetics measurements.
• Finite element modeling (FEM) of embossing process and its effects.

Main Results:

• Individual sheets showed higher hand-feel (HF) with straight geometry.
• Two-ply prototypes achieved highest softness with round geometry.
• HF decreased with increasing bulk, especially for micropatterns.
• Absorption kinetics were not significantly impacted by finishing geometry.
• FEM results aligned with experimental data, showing round geometry marked paper more.

Conclusions:

• Finishing geometry critically influences tissue paper tactile properties.
• Round geometry is optimal for multi-ply softness, while straight geometry enhances individual sheet feel.
• Embossing geometry affects paper marking but not liquid absorption kinetics.