Slit Sheet Paper Cushioning With Dense Cells and Lower Thickness
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Solution Overview
Problem
Existing expandable slit sheet papers face limitations in achieving enhanced cushioning characteristics and crush resistance due to the conventional understanding of requiring wider slit widths for effective cushioning, which contradicts the need for thinner and more resilient products.
Innovation Solution
The use of a novel slit pattern with reduced slit widths and extensible paper, allowing for an alternating row expansion pattern that increases cell density and resiliency, resulting in a greater number of cells per square foot and improved cushioning properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional slit patterns with wider slit widths are used, then cushioning characteristics are improved, but product thickness increases and resiliency decreases
Solution Approach 1:
The patent divides the slit pattern into alternating rows with different slit widths (first rows with wider slits, second rows with narrower slits), creating segmented functional zones that provide both cushioning and thickness reduction simultaneously
Solution Approach 2:
Different regions of the slit sheet are given different properties: alternating rows have different slit widths to provide localized variations in cushioning density, allowing optimal performance in different areas of the expanded product
2Strength
If conventional slit patterns are used, then cushioning is provided, but cell density and resiliency are reduced
Solution Approach 1:
The alternating row pattern segments the cell structure into dense and less dense zones, increasing overall cell count per square foot while maintaining cushioning capacity through the distribution of cell densities
Solution Approach 2:
The patent changes the slit width parameter across different rows (narrower in second rows, wider in first rows) to optimize both cell density and cushioning characteristics, achieving higher cell counts without sacrificing crush resistance
3Quantity of substance
If extensible paper with novel slit pattern is used, then cells per square foot increase by 20-50%, but manufacturing complexity increases
Solution Approach 1:
The alternating row slit pattern creates a periodic structure that can be efficiently produced using conventional slitting machinery through regular, repeating patterns, reducing manufacturing complexity despite the novel design
Solution Approach 2:
The patent varies slit width parameters in a systematic alternating pattern rather than using complex irregular patterns, making the design compatible with standard slitting equipment and simplifying manufacturing processes
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 novel slit pattern and extensible paper combination achieves a 20-50% increase in cells per square foot, providing enhanced crush resistance and resiliency, enabling thinner and lighter cushioning products with reduced shipping costs and improved envelope and wrap applications.
Implementation Method 1
said slit sheet paper being formed from a paper that is extensible in the machine direction and the cross direction prior to providing said slit pattern
Data Source
Figure 1~2
Figure 3(A)~3(B)
Figure 4(A)
AI summary
A slit sheet paper cushioning product, comprising: a slit sheet paper having a slit pattern including a plurality of slits extending in a cross direction that forms a plurality of open cells upon expansion in a machine direction, wherein said slit width is less than 0.89 cm (0.35 inches), and said slit sheet paper being formed from an extensible paper made to be extensible in the machine direction and the cross direction without said slit pattern, said extensible paper having an extensibility within a range of 3 to 20% in the machine direction.