Waterproof Mattress Protector With Hot-Pressed Seam Sealing
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Solution Overview
Problem
Conventional mattress protectors are not waterproof, leading to liquid seepage and contamination of mattresses, especially in healthcare settings, and existing waterproof solutions have issues with seam gaps and adhesive durability.
Innovation Solution
A mattress protector design featuring a woven-fabric base layer with a TPU lining layer on the inner side and a PU shell layer on the outer side, connected through a hot pressing process, along with a waterproof zipper, creating a sealed and gap-free structure to prevent liquid seepage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a mattress protector is made of woven fabric, then it is comfortable to the touch and easy to clean, but it is not waterproof and allows liquid seepage
Solution Approach 1:
The mattress protector combines woven fabric with a waterproof TPU lining layer to create a composite structure that provides both comfort and waterproofness. The TPU layer is thermally bonded to the woven fabric, forming a reliable barrier against liquid seepage while maintaining the comfort of the fabric surface.
Solution Approach 2:
A thin TPU (thermoplastic polyurethane) lining layer is applied to the inner side of the woven fabric base layer. This flexible film provides effective waterproof protection while conforming to the mattress shape and allowing for comfortable use.
2Reliability
If a mattress protector is made of waterproof woven fabric with sewn seams, then it prevents liquid seepage, but the tiny gaps in the seams allow seepage to occur
Solution Approach 1:
The patent replaces the mechanical sewing process with a thermal bonding process. The TPU lining layer is thermally bonded to the woven fabric and to itself at the seams, eliminating needle holes and gaps that would allow seepage. This thermal bonding method creates a continuous waterproof barrier without the defects of traditional sewing.
Solution Approach 2:
The TPU lining layer serves as a flexible waterproof film that is thermally sealed at the seams, creating a gap-free barrier. This thin film approach eliminates the seam gap problem inherent in sewn constructions while maintaining flexibility and comfort.
3Reliability
If adhesive substance or adhesive strip is applied to block gaps in seams, then seepage through seams is prevented, but the adhesive tends to age and deteriorate and may peel off during washing
Solution Approach 1:
The patent replaces adhesive bonding with thermal bonding. The TPU lining layer is thermally fused to the woven fabric and to itself at the seams through hot pressing. This thermal bonding process creates a permanent, durable connection that does not age or peel like adhesive, significantly extending the service life of the mattress protector.
Solution Approach 2:
The patent changes the bonding parameter from chemical adhesive to thermal energy. By using heat and pressure to bond the TPU layer, the connection becomes more durable and resistant to aging. The thermal bonding process creates a strong, permanent bond that maintains its integrity through repeated washing and use.
4Reliability
If adhesive substance or adhesive strip is used to seal seams, then seepage is blocked, but the production cost increases due to additional man-hour requirements
Solution Approach 1:
The patent replaces the manual application of adhesive with an automated thermal bonding process. The TPU lining layer is thermally bonded to the woven fabric using hot pressing equipment, which can be easily automated. This eliminates the need for manual adhesive application and reduces production time and labor costs while maintaining reliable seepage prevention.
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 design effectively prevents liquid seepage and is easy to clean, ensuring mattress hygiene and longevity, suitable for healthcare settings with a durable and reusable solution.
Implementation Method 1
the woven-fabric base layer and the TPU lining layer are connected together by a laminator through a hot pressing process
Implementation Method 2
The TPU lining layers on the inner sides of the upper and lower central portions and of the peripheral portion are fused together by the hot pressing process used to connect the aforesaid contact areas
Data Source
AI summary
A mattress protector includes upper and lower central portions connected respectively to an upper end and a lower end of a peripheral portion. Each of the upper and lower central portions has a TPU lining layer on the inner side. The peripheral portion has a TPU lining layer on the inner side and a PU shell layer on the outer side. The peripheral portion also has a waterproof zipper in its middle section. The contact areas of the two central portions and of the peripheral portion are connected together by a laminator through a hot pressing process to form the hollow mattress protector. The TPU lining layers on the inner side of the mattress protector are fused together to form a sealed and gap-free inner structure.