Umbrella Cover Microfiber Lining Water Retention
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Solution Overview
Problem
Conventional umbrella covers fail to effectively retain and dry rainwater from the umbrella fabric without requiring complex user manipulations, often leading to water accumulation and seepage through seams, which damages surrounding objects.
Innovation Solution
A cover design featuring a waterproof outer envelope made of polyester fabric with an internal microfiber lining and an impermeable intermediate layer, such as PVC or PEVA, that absorbs and retains rainwater, allowing quick drying without needing users to open the cover flat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover is made with an absorbent fabric lining to retain rainwater, then water retention function is improved, but the cover becomes difficult to dry and requires complex user manipulations
Solution Approach 1:
The cover is divided into three distinct functional layers: an outer envelope, an intermediate waterproof layer, and an inner absorbent lining. This segmentation allows each layer to perform its specific function independently - the lining absorbs water while the waterproof layer prevents it from reaching the outer envelope, enabling the cover to dry quickly without complex manipulations.
Solution Approach 2:
A waterproof intermediate layer is introduced between the outer envelope and the absorbent lining. This intermediary layer acts as a barrier that prevents absorbed moisture from migrating to the outer envelope, allowing the lining to dry quickly while maintaining the water retention function. The intermediate layer mediates between the water-absorbing function and the drying requirement.
2Ease of manufacture
If the cover uses a simple canvas material, then manufacturing simplicity is improved, but rainwater seeps through seams and damages surrounding objects
Solution Approach 1:
The cover employs a composite structure combining three different materials: an outer canvas envelope for simplicity and protection, a waterproof intermediate layer (such as PVC or PU coating) to prevent water penetration, and an inner absorbent microfiber lining for water retention. This composite material approach maintains manufacturing simplicity while eliminating water seepage through the seamless integration of waterproof and absorbent properties.
3Reliability
If the cover is designed to be opened flat for drying, then drying effectiveness is improved, but user convenience deteriorates due to unfamiliar manipulations
Solution Approach 1:
The cover structure enables self-drying through its inherent design. The waterproof intermediate layer prevents moisture migration to the outer envelope, allowing the absorbent lining to evaporate moisture naturally while the cover remains in its normal closed state. This eliminates the need for users to perform special opening-flat manipulations, as the cover dries itself through passive evaporation.
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 ensures effective retention and quick drying of rainwater, keeping the umbrella and surrounding objects dry while maintaining user convenience by integrating a microfiber lining with high water absorption capacity and a waterproof intermediate layer to prevent moisture migration.
Implementation Method 1
an internal lining made of an absorbent fabric
Implementation Method 2
an impermeable intermediate layer, such as PVC or PEVA, that absorbs and retains rainwater
Data Source
Figure 1~2
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Figure 6
AI summary
Cover (9) for folding umbrella (1) having a body (2), this cover defining an opening (10) for sliding at least the body (2) of the umbrella (1) into the cover (9) and comprising: - an outer cover (24) made of a fabric having an outer waterproof face (25); - an inner lining (28) at least locally attached to the outer cover (24) and made of a woven microfiber of a density greater than or equal to 200 g/m2.