Composite Hole Closure Patch for Airtight Fire-Resistant Sealing
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Solution Overview
Problem
Existing hole-closing solutions in vehicle structures, such as plastic and metal parts, are inadequate in preventing moisture penetration, ensuring airtight and watertight seals, improving sound insulation, and providing resistance to mechanical stress, heat, and fire, while being logistically burdensome and costly.
Innovation Solution
A die-cut product comprising a metallic layer with a thickness of 12 to 20 µm, optionally embossed, combined with a glass fabric or scrim layer and a pressure-sensitive adhesive, designed to securely close holes in vehicle parts, ensuring airtight and watertight seals, improved sound insulation, and resistance to heat and fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic plugs are used to close holes, then holes can be sealed, but they do not close the hole securely and are complex and expensive to produce
Solution Approach 1:
The invention uses a composite structure consisting of a metallic layer (12-20 µm thick, optionally embossed) combined with a glass fabric or scrim layer and a pressure-sensitive adhesive. This composite material provides both secure mechanical closure and simplified production compared to traditional plastic plugs.
2Reliability
If adhesive tapes are used for hole closure, then sealing can be achieved, but they do not always meet the increasing demands of the market for secure closure
Solution Approach 1:
The composite structure with metallic layer, glass fabric layer, and pressure-sensitive adhesive provides enhanced mechanical strength and secure closure while maintaining adaptability to various hole sizes and shapes through die-cutting processes.
Solution Approach 2:
The metallic layer thickness is optimized to 12-20 µm to provide sufficient mechanical strength for secure closure while remaining adaptable to different application requirements.
3Object-affected harmful factors
If existing hole closure methods are used, then holes can be sealed, but they fail to provide adequate resistance to moisture, heat, and fire
Solution Approach 1:
The combination of metallic layer, glass fabric layer, and pressure-sensitive adhesive creates a composite material that simultaneously provides moisture barrier properties, heat resistance, and fire resistance, addressing multiple harmful factors with a single solution.
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 effectively prevents moisture penetration, provides secure mechanical closure, enhances sound insulation, and offers improved resistance to heat and fire, addressing the limitations of existing hole-closing methods.
Implementation Method 1
a pressure-sensitive adhesive
Data Source
Figure 1~2
Figure 3a~3b
AI summary
The present invention relates to a die-cut part, in particular for permanently sealing holes, especially in sheet metal or plastic parts, with a carrier made of a composite, in particular a laminate, in the specified layer sequence comprising optionally at least one first layer formed by a metallic layer with a thickness of 10 to 40 µm, optionally at least one second layer formed by a glass fabric or glass mat with a basis weight of 30 to 200 g/m², optionally at least one third layer formed by a first pressure-sensitive adhesive with a basis weight of 70 to 200 g/m², at least one fourth layer formed by a flame-retardant foam with a thickness of at least 0.5 to 2.5 mm, and at least one fifth layer formed by a second acrylate-based pressure-sensitive adhesive with a basis weight of 300 to 1800 g/m².preferably 360 to 1500 g/m2 and/or a thickness of 400 to 1800 µm, preferably 800 to 1500 µm.