Paper straw
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional plastic straws are environmentally harmful and take long to decompose, while glue-adhesive paper straws are inefficient in manufacturing and prone to melting, leading to shape deterioration and beverage contamination.
Innovation Solution
A paper straw design featuring an inner paper part without thermal adhesive coating and outer paper parts with overlapping strips coated with acrylate-based heat-sealable material, eliminating the need for a drying process and ensuring the straw's shape and hygiene through high-temperature hot air sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glue-adhesive paper straws are used, then paper straws can be manufactured, but they require a drying process which reduces manufacturing efficiency and causes foreign substances to harden together
Solution Approach 1:
The patent removes the drying process entirely from the manufacturing sequence by using thermal adhesive coating material that bonds paper strips during the winding process itself, eliminating the separate drying step that consumes time and causes foreign substance adhesion
Solution Approach 2:
The thermal adhesive coating material is applied to the paper strips before winding, so that adhesion occurs automatically during the winding process rather than requiring subsequent drying, thereby preempting the need for a separate drying operation
2Ease of manufacture
If glue-adhesive paper straws are used, then paper straws can be manufactured, but the solidified glue may melt again when put into beverages, deteriorating beverage components and causing shape deterioration
Solution Approach 1:
The patent changes the chemical parameters of the adhesive by using thermal adhesive coating material with high melting point characteristics, ensuring that the adhesive remains stable and does not melt when exposed to beverage temperatures, thereby maintaining straw shape integrity
Solution Approach 2:
The patent employs a disposable paper straw design where the thermal adhesive coating material is integrated into the single-use structure, eliminating the need for long-term adhesive durability while ensuring performance during the brief usage period without melting in beverages
3Ease of manufacture
If conventional plastic straws are used, then they are easy to process and low cost, but they cause environmental pollution and take long to decompose
Solution Approach 1:
The patent creates a composite structure using multiple paper strips with different widths and thermal adhesive coating material, achieving both environmental friendliness and functional performance while maintaining ease of manufacturing through the layered paper construction
Solution Approach 2:
The patent changes the material composition from plastic to paper with thermal adhesive coating, transforming the environmental impact while maintaining manufacturability through the application of heat-sealable coating material that enables paper strips to bond effectively
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 allows for efficient, time-saving manufacturing without drying, maintains the straw's shape, and prevents beverage contamination by not melting, ensuring the straw's durability and hygiene.
Implementation Method 1
The thermal adhesive coating materials may have adhesion or water resistance by heating and curing
Implementation Method 2
an acrylate-based heat-sealable material
Data Source
AI summary
In order to solve the disadvantages of plastic straws in terms of environmental pollution, and the inconvenience of the above-described paste-adhered paper straws, provided is a paper straw comprising: an inner paper portion in which a single strip of paper without a heat-adhesive coating material on the inside surface thereof is spirally wound so as to form a single layer, and an outer paper portion which comprises at least one paper strip forming at least one layer around the outer peripheral surface of the inner paper portion while being wound in a spiral, and which is provided with the heat-adhesive coating material on the outside surface of the paper strip forming the outermost layer, wherein the paper strip of the outer paper portion has a wider width than the paper strip of the inner paper portion, the heat-adhesive coating material is provided between two paper strips of adjacent different layers, and the heat-adhesive coating material has adhesive strength or water resistance according to heating and curing.