Environmentally-friendly fiber straw structure
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Solution Overview
Problem
Conventional plastic and stainless steel straws pose health risks due to the release of harmful substances and are non-biodegradable, while stainless steel straws are difficult to clean and can harbor bacteria.
Innovation Solution
An environmentally friendly fiber straw structure made from decomposable materials like sugar cane or tea fibers, featuring tapered sections and fold lines for improved suction comfort and ease of cleaning, with a design that includes a pointed portion for piercing plastic seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic straws are used, then they are easy to manufacture and inexpensive, but they release harmful substances and are not biodegradable
Solution Approach 1:
The patent changes the material parameter from plastic to natural fiber (sugarcane, tea, or plant fiber), fundamentally altering the chemical composition to eliminate harmful substance release while maintaining the straw's structural function. This material substitution resolves the contradiction by providing an environmentally safe alternative that is still manufacturable.
Solution Approach 2:
The straw employs composite material construction with multiple layers including inner and outer walls made of natural fiber materials. This composite structure maintains manufacturing feasibility while ensuring environmental safety and biodegradability, addressing both the ease of manufacture and harmful factors concerns.
2Duration of action of stationary object
If stainless steel straws are used, then they are reusable and durable, but they are difficult to clean and harbor bacteria
Solution Approach 1:
The straw incorporates tapered sections with curved surfaces that facilitate fluid flow and cleaning. The circular cross-section with tapered transitions creates smooth contours that prevent bacterial accumulation, making the reusable straw easy to clean while maintaining durability.
Solution Approach 2:
The natural fiber material inherently provides porous structure that allows cleaning solutions to penetrate and flush through the straw walls, enabling thorough cleaning of internal surfaces. This porosity feature makes the reusable straw easy to maintain hygiene compared to solid stainless steel.
3Ease of manufacture
If the straw outlet has a circular cross-section, then it is easy to manufacture, but it creates a gap between the mouth and straw reducing suction comfort
Solution Approach 1:
The patent introduces asymmetry by transforming the circular outlet cross-section into an elliptical shape through tapered sections. This asymmetric geometry better conforms to the natural shape of the human mouth, reducing gaps and improving suction comfort while remaining manufacturable through standard forming processes.
Solution Approach 2:
The patent applies dimensional transformation by transitioning from a uniform circular cross-section to an elliptical cross-section through tapered sections. This dimensional change in the cross-sectional geometry allows better adaptation to mouth contours, enhancing suction comfort without complicating the manufacturing process.
4Object-affected harmful factors
If the straw is made biodegradable, then it reduces environmental pollution, but it may reduce structural strength
Solution Approach 1:
The straw uses composite material construction with multiple layers of natural fiber materials (inner wall, outer wall). This composite structure compensates for the inherent lower strength of individual biodegradable layers, achieving sufficient structural strength while maintaining biodegradability and environmental friendliness.
Solution Approach 2:
The tapered sections with curved surfaces and circular/elliptical cross-sections provide structural reinforcement through geometric optimization. The curved contours distribute stress more effectively, enhancing the structural strength of the biodegradable material without requiring additional strengthening agents that would compromise biodegradability.
Data Source
Figure 1
Figure 1A
Figure 2
AI summary
An environmentally-friendly fiber straw structure includes a straw body (10) made of an environmentally-friendly fiber material. The straw body (10) has an inlet (10, 40) and an outlet (20) at two ends thereof and a circular section (30) having a circular cross-section between the inlet (10, 40) and the outlet (20). From the circular section (30) to the outlet (20) forms a first tapered section (21, 41) at a first inclination so that the outlet (20) has an approximately elliptical shape. When in use, the mouth of a user sucks the outlet (20) of the straw body (10) for drinking a beverage, the first tapered section (21, 41) corresponds in shape to the mouth, thereby avoiding rotation of the straw body (10), reducing a gap between the mouth and the straw body (10) and improving suction comfort.