POD Fibre Paper for High-Temperature Insulation
Solution Overview
Problem
Current fibre papers used in high-temperature insulating materials, such as aramid paper, have limited high-temperature resistance and lifespan, failing to meet the demands of advanced electrical technology, particularly in maintaining performance at elevated temperatures.
Innovation Solution
Development of fibre paper utilizing p-POD chopped fibres and/or m-POD fibrids with specific properties, such as high thermal stability, mechanical strength, and dispersibility, which are integrated into a manufacturing process involving spinning, coagulation, and papermaking to create a fibre paper with enhanced high-temperature resistance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If aramid paper is used as high-temperature insulating material, then it provides good insulation performance, but its high-temperature resistance and lifespan are limited (only 200-220°C)
Solution Approach 1:
The patent changes the material parameter from conventional aramid to aromatic polyoxadiazole (POD) fibres, which have fundamentally different thermal properties with decomposition temperature exceeding 500°C. This parameter change enables the insulating material to withstand temperatures of 240°C or higher while maintaining reliability and lifespan.
Solution Approach 2:
The patent creates a composite fibre paper structure combining aromatic polyoxadiazole fibres with other high-performance fibres. This composite approach leverages the superior heat resistance of POD fibres (decomposition temperature >500°C) while maintaining mechanical properties, achieving both high-temperature resistance and reliability.
2Temperature
If aromatic polyoxadiazole fibres are used to improve high-temperature resistance, then thermal stability increases, but there is no established industrial production method for fibre paper
Solution Approach 1:
The patent segments the manufacturing process into distinct stages: fibre preparation (using existing POD fibre technology with decomposition temperature >500°C), papermaking (forming fibre mat), and finishing (heat treatment at 100-250°C for 1-24 hours). This segmentation makes the complex process industrially feasible by breaking it into manageable steps with established methodologies.
Solution Approach 2:
The patent uses an intermediary heat treatment process at moderate temperatures (100-250°C) to enhance the properties of POD fibres without causing decomposition. This intermediary treatment step bridges the gap between raw fibre production and final high-temperature resistant product, enabling industrial manufacturing while preserving the fibres' exceptional thermal stability.
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 resulting fibre paper exhibits excellent mechanical strength, electrical insulation, and heat resistance, enabling long-term use at temperatures up to 240°C, significantly improving the high-temperature insulation grade and durability of products, suitable for applications in electronic, electrical, transportation, and aerospace fields.
Implementation Method 1
Both the two kinds of fibre have a thermal decomposition temperature of up to more than 500℃
Implementation Method 2
The resulting fibre paper exhibits excellent mechanical strength, electrical insulation, and heat resistance
Implementation Method 3
hot-rolling the dried paper sheet; calendering the hot-rolled paper sheet
Data Source
Figure 1
AI summary
Provided are a fibre paper, a preparation thereof, a use thereof and an article comprising the fibre paper. The fibre paper comprises p-POD chopped fibre and a binder A, and optionally further comprises a binder B; wherein the binder A is a fibrid, and the binder B is a thermosetting resin fibre and/or thermoplastic resin fibre; and the p-POD chopped fibre has an initial decomposition temperature higher than 500°C. Alternatively, the fibre paper comprises a chopped fibre and m-POD fibrid. The method for preparing the fibre paper comprises steps of pulping, papermaking, hot rolling, calendering etc. In addition, a use of the fibre paper as an insulating material, etc., is provided.