Partitionable paper towel
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Solution Overview
Problem
Current paper products, such as paper towels and napkins, lack the ability to be easily partitioned into smaller sizes, leading to waste and inconvenience, as they are typically only available in fixed sizes and require purchase of new products for different uses, with existing perforation methods failing to reliably separate in both machine and cross-machine directions without causing sheet breakage.
Innovation Solution
Incorporating bi-directional perforations, specifically in both the machine direction and cross-machine direction, to enable the paper product to be reliably separated into smaller sizes such as half or quarter sheets without introducing weaknesses that cause breakage during the converting process, allowing for customizable usage and reduced waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If perforation lines are added in both machine direction and cross-machine direction to enable partitioning into smaller sizes, then the ability to separate paper products into desired sizes is improved, but the sheet strength deteriorates due to introduced weaknesses causing breakage
Solution Approach 1:
The paper product is divided into multiple separable sections using perforation lines in both machine direction (MD) and cross-machine direction (CD). The MD perforations allow separation into half-sheets or quarter-sheets, while CD perforations enable separation into smaller squares, providing versatile partitioning options without compromising overall sheet integrity through proper perforation design
Solution Approach 2:
The perforation lines are strategically positioned at specific locations within the paper sheet - MD perforations are placed parallel to the sheet centerline at predetermined distances, and CD perforations are positioned perpendicular to the sheet centerline. This localized placement allows separation only at designated points while maintaining strength in other areas of the sheet
2Adaptability or versatility
If perforation lines are made more frequent and closer together to enable pick-a-size separation, then the ability to select different sizes is improved, but the manufacturing complexity increases
Solution Approach 1:
Multiple sets of perforation lines are incorporated into the paper product - both MD perforations (parallel to sheet centerline) and CD perforations (perpendicular to sheet centerline). This segmentation allows consumers to separate the paper into various sizes (half-sheets, quarter-sheets, or smaller squares) depending on their needs, while the manufacturing process remains relatively simple by using standard perforation equipment
Solution Approach 2:
The paper product is designed with universal perforation patterns that enable multiple separation options from a single product. The same paper sheet can be separated into different sizes (full sheet, half-sheet, quarter-sheet, or smaller squares) based on which perforation lines are torn, providing multi-functionality without requiring multiple different products or complex manufacturing processes
Data Source
AI summary
A paper towel product that can be capably separated from the paper towel roll as a full sheet, a half sheet or a quarter sheet is disclosed. A method of making a paper towel with machine direction perforations is also disclosed.