Two-Ply SemiCorr Singleface Board for Pizza Boxes
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Solution Overview
Problem
Conventional corrugated pizza boxes are costly and inefficient to produce, with high capital investment requirements and issues related to steam condensation making pizzas soggy, while existing singlewall corrugated boxes lead to fiber waste and increased production costs.
Innovation Solution
The use of a two-ply SemiCorr Singleface Board (SSB) produced by a corrugator singlefacer, which reduces fiber content by 30% and allows for efficient web-fed rotary die cutting, eliminating the need for expensive equipment and mitigating steam condensation through strategic flute and crease orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional three-ply E flute singlewall corrugated board is used for pizza boxes, then structural strength and steam resistance are improved, but production cost and fiber consumption increase
Solution Approach 1:
The patent removes the top liner layer from the conventional three-ply corrugated board structure, extracting only the essential components needed for pizza box functionality. This reduces fiber consumption by 30% while maintaining adequate structural strength through optimized fluting patterns and adhesive bonding in the remaining two-ply construction.
Solution Approach 2:
The invention changes the structural parameters by transitioning from three-ply to two-ply construction and modifying the flute configuration. These parameter changes reduce material consumption while adjusting the structural properties to meet the minimum requirements for pizza box performance.
2Reliability
If conventional three-ply corrugated board is used, then production reliability is improved, but capital investment and device complexity increase
Solution Approach 1:
The patent extracts the top liner layer from the conventional three-ply board production process, simplifying the manufacturing sequence. This reduction in layers decreases equipment complexity and capital investment requirements while maintaining production reliability through optimized bonding processes for the remaining two-ply structure.
Solution Approach 2:
By changing the board construction from three-ply to two-ply, the invention modifies production parameters such as adhesive application rates and pressing conditions. These parameter changes enable reliable production with simpler, less expensive equipment.
3Ease of manufacture
If conventional singlewall corrugated boxes are used, then manufacturing simplicity is maintained, but steam condensation performance deteriorates
Solution Approach 1:
The patent changes the flute configuration and bonding parameters in the two-ply construction to improve steam resistance. By optimizing the flute depth, spacing, and adhesive placement, the box achieves better steam condensation performance while maintaining manufacturing simplicity through a streamlined two-ply production process.
4Loss of substance
If two-ply panel is used to reduce fiber content, then production cost decreases, but structural strength may deteriorate
Solution Approach 1:
The invention compensates for reduced fiber content by optimizing parameters such as adhesive bonding strength, flute configuration, and panel density. These parameter changes ensure that the two-ply construction maintains adequate structural strength despite using 30% less fiber material.
Solution Approach 2:
The patent creates an optimized composite structure with two plies where the fluting pattern and adhesive bonding work together to provide structural reinforcement. This composite approach compensates for reduced material quantity by improving the efficiency of material distribution and bonding architecture.
Data Source
AI summary
A corrugated pizza box is made using a web fed rotary die cutter with the web produced by a corrugator singlefacer that is speed synchronized with the rotary die cutter. The singlefacer produces SemiCorr Singleface Board (SSB) made possible by special corrugating rolls that allow a bottom liner to be bonded to a fluted and creased medium or liner within the singlefacer. This medium or liner has cross flute bond lines that provide in-line stiffness to the two-ply board exiting the singlefacer.