Holding Sealer With Oriented Inorganic Fibers
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Solution Overview
Problem
Conventional holding sealers for exhaust gas processing devices are bulky and prone to fiber scattering during cutting, leading to handling difficulties and inadequate tensile strength, especially when exposed to high temperatures and mechanical stress.
Innovation Solution
A holding sealer with a sheet member comprising inorganic fibers oriented at a predetermined angle, typically between 45° and 75° relative to the thickness direction, which is achieved through a needling process, and optionally includes a binder for enhanced adhesion and reduced bulkiness, improving tensile strength and handling characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional sheet member is used as holding sealer, then it provides basic sealing function, but it is bulky and fibers scatter during cutting, making handling difficult
Solution Approach 1:
The patent applies needling process to change the physical structure of the sheet member by creating oriented fiber arrangements. This process modifies the density and compactness parameters of the material, reducing bulkiness while maintaining sealing functionality. The needled structure creates a more compact form that is easier to handle and install.
Solution Approach 2:
The patent uses composite construction by combining inorganic fibers with binding agents to create a sheet member with improved handling characteristics. The composite structure allows the material to maintain its sealing function while achieving better compactness and reduced bulkiness through the synergistic effect of the fiber-binder combination.
2Strength
If conventional sheet member is used, then it provides basic sealing, but tensile strength is insufficient under high temperature and mechanical stress
Solution Approach 1:
The needling process fundamentally changes the structural parameters of the sheet member by creating oriented fiber arrangements at specific angles. This structural transformation significantly enhances tensile strength and resistance to cracks and breaks, allowing the holding sealer to withstand high temperature and mechanical stress conditions reliably.
Solution Approach 2:
The patent employs composite materials by integrating inorganic fibers with binding agents in a needled structure. This composite construction creates a material with superior mechanical strength and thermal stability, ensuring the holding sealer maintains its integrity under harsh operating conditions.
3Ease of operation
If sheet member is compressed to reduce bulkiness, then handling improves, but fiber orientation becomes random reducing tensile strength
Solution Approach 1:
The patent applies needling process to achieve the opposite effect - creating oriented fiber arrangements rather than random orientation. The needling process controls fiber orientation parameters to align fibers in specific directions, which simultaneously improves handling ease through reduced bulkiness and maintains high tensile strength through directional fiber alignment.
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 oriented fiber structure enhances tensile strength perpendicular to the thickness direction, reducing the likelihood of cracks and breaks, while the binder improves handling and sealing efficacy, even with increased fiber diameter, ensuring effective sealing and durability under high-temperature conditions.
Implementation Method 1
the inorganic fibers are oriented in a predetermined angle except parallel against a direction of a thickness of the sheet member within at least a portion of the sheet member is provided
Implementation Method 2
optionally includes a binder for enhanced adhesion and reduced bulkiness
Implementation Method 3
ensuring effective sealing and durability under high-temperature conditions
Data Source
AI summary
A holding sealer for keeping a exhaust gas processing device, in which comprises a sheet member including inorganic fibers, the inorganic fibers are oriented in a predetermined angle except parallel against a direction of a thickness of a sheet member within at least a portion of the sheet member.