Multi-Ply Tissue Embossment Geometry to Reduce Roll Compression
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Solution Overview
Problem
Conventional embossed tissue products often exhibit non-uniformity and compression issues when rolled, leading to a loss in aesthetic appeal and product quality due to the compression of embossments, which affects the appearance and bulk of the tissue sheets.
Innovation Solution
The development of multi-ply tissue products with deep and narrow embossments, specifically dot embossments with a height greater than 500 μm and a ratio of average width at 100% height to 25% height greater than 3.0, along with dome-like structures between embossments, enhances embossment clarity and roll bulk, while maintaining softness and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional embossing patterns are used, then tissue products can be manufactured with standard properties, but the embossments compress when rolled leading to non-uniform appearance and loss of aesthetic appeal
Solution Approach 1:
The patent applies parameter changes by modifying the embossment geometry parameters - specifically creating embossments with height greater than 500 μm and a width ratio (W100/W25) greater than 3.0. This creates a tapered shape that is wider at the top and narrower at the base, which prevents compression and maintains appearance uniformity when the tissue is rolled.
2Manufacturing precision
If deep and narrow embossments are created, then embossment clarity and aesthetic appearance are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific parameter ranges for embossment height (>500 μm) and width ratio (W100/W25 >3.0) that balance manufacturing feasibility with aesthetic quality. These parameter specifications enable consistent production while achieving the desired embossment clarity and visual appeal.
Data Source
AI summary
Disclosed are multi-ply embossed tissue products having improved softness, strength, embossment clarity and/or embossment height compared to prior art embossed tissue products. The multi-ply tissue products may comprise an embossed tissue ply having a basis weight less than about 25 grams per square meter (gsm) and relatively deep embossments, such as an embossment height from about 500 to about 1,000 μm and relatively narrow bottom portions compared to top portions. The combination of these elements provides an aesthetically pleasing and well-defined embossment, while improving important tissue product properties such as sheet and roll bulk and softness.