Coreless Tissue Roll Structure With Circular Adhesive-Free Center
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Solution Overview
Problem
Existing coreless tissue products face issues such as the use of adhesives that render the trailing end unusable and non-circular or small openings that hinder easy dispensing, leading to waste and usability problems.
Innovation Solution
A coreless tissue product is developed with a spirally wound tissue sheet forming a hollow passageway without a core or adhesive, using hydrogen bonding to maintain the structure, allowing for a circular opening that is usable and environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive is applied to tissue sheets around the opening to prevent deformation, then the roll structure is stabilized, but the trailing end of the tissue roll becomes unusable
Solution Approach 1:
The patent removes the adhesive application step entirely from the manufacturing process. Instead of applying adhesive to the tissue sheets around the opening, the invention uses the natural friction and interlocking of the spiral wound tissue layers themselves to maintain structural stability, thereby preserving the trailing end for use.
Solution Approach 2:
The tissue roll structure serves its own stabilization function through the spiral winding configuration and natural friction between layers, without requiring external adhesive. The tissue sheets themselves provide the structural integrity needed to prevent deformation during use.
2Adaptability or versatility
If a very small opening or no opening is formed in the coreless product, then the tissue roll can be made completely from tissue material, but a special adaptor is required for dispensing
Solution Approach 1:
The patent creates a localized circular opening at the center of the tissue roll by controlling the spiral winding process. This opening provides adequate space for standard spindle dispensers while maintaining the overall tissue-only construction of the roll.
3Ease of manufacture
If a non-circular opening is formed in the coreless product, then the tissue roll can be made without adhesive, but the opening does not rotate easily on spindles
Solution Approach 1:
The patent specifically forms a circular opening at the center of the tissue roll through controlled spiral winding. The circular geometry allows the opening to rotate smoothly on standard spindle dispensers, eliminating the rotation problems associated with non-circular openings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution eliminates waste by preserving the entire tissue roll for use and allows for easy dispensing without adhesives, reducing environmental impact and production costs.
Implementation Method 1
the inner layers of the roll that line the passageway can be lightly bonded together using only hydrogen bonding
Data Source
AI summary
Coreless tissue rolls can be produced without having to use an adhesive to form a hollow center. Instead, moisture can be used to promote light hydrogen bonding between the layers of the tissue web that line the hollow center. The hydrogen bonding provides sufficient structure to maintain the shape of the hollow center without rendering the tissue web surrounding the passageway unusable. Passageways can also be formed in accordance with the present disclosure that are substantially circular so that the rolls will easily spin on a spindle. In an alternative embodiment, moisture is not used in constructing the wound tissue roll.