Segmented Paper Straw Corrugation for Bend Resistance
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Solution Overview
Problem
Paper drinking straws are prone to collapse, sogginess, and degradation, making them unsuitable for repeated bending and mass production, which limits their use in consumer markets compared to plastic straws.
Innovation Solution
A paper drinking straw design featuring a cylindrical sidewall with a flexible region formed by segmented sections separated by inward annular corrugations, allowing for repeated bending and flexibility while maintaining structural integrity and resistance to sogginess, combined with a corrugating machine for high-speed production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If paper straws are made flexible to allow repeated bending, then adaptability improves, but structural integrity deteriorates causing collapse and sogginess
Solution Approach 1:
The straw is divided into multiple rigid segments separated by flexible corrugations. Each segment maintains structural integrity while the corrugations provide flexibility through controlled deformation, allowing the straw to bend repeatedly without collapsing.
Solution Approach 2:
The straw combines rigid paperboard segments with flexible corrugation regions to create a composite structure. The rigid segments provide strength and resistance to sogginess, while the corrugated regions provide flexibility and bendability.
2Strength
If paper straws are engineered with complex structures to prevent collapse, then strength improves, but manufacturing complexity increases making mass production difficult
Solution Approach 1:
The manufacturing process creates segmented straws through a series of sequential corrugation steps. The corrugating machine forms multiple corrugations along the straw length in sequence, transforming a simple paper tube into a complex segmented structure through repeated application of the same basic corrugation mechanism.
Solution Approach 2:
The invention changes geometric parameters of the straw structure by forming corrugations with specific depth and spacing ratios. These parameter changes create the segmented structure that provides both strength and flexibility without requiring complex manufacturing equipment.
3Ease of manufacture
If traditional paper straws are used, then ease of manufacture is maintained, but productivity is low due to slow construction speed on mass-production machines
Solution Approach 1:
The corrugating machine is designed to create multiple segmented corrugations in a continuous sequence along the straw length. This segmentation approach allows the machine to process simple paper tubes through repeated corrugation steps, achieving both structural complexity and high production speed.
Solution Approach 2:
The manufacturing process maintains continuous operation by forming corrugations sequentially along the moving straw. The corrugating machine keeps the useful action of corrugation continuous throughout the straw length, preventing interruptions and maximizing production efficiency.
Data Source
AI summary
A drinking straw includes a cylindrical sidewall having a longitudinal axis and a flexible region formed in the sidewall. The flexible region including a plurality of segmented sections separated from each other by inward annular corrugations. Each corrugation has a height parallel to the longitudinal axis and a depth transverse to the longitudinal axis. The height of each corrugation is one and a half times greater than the depth of the corrugation.