Cushion material for hot pressing
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Solution Overview
Problem
Conventional cushion materials for hot pressing deteriorate at high temperatures, leading to a decrease in cushioning properties and separation of layers when used above 280°C.
Innovation Solution
A cushion material comprising woven fabric with polyimide resin adhered to the surfaces of glass fiber texturized yarns, providing excellent heat resistance and maintaining cushioning properties at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber is used as the cushioning material, then good cushioning properties are achieved, but the material deteriorates at high temperatures of 280°C or more
Solution Approach 1:
The invention uses a composite structure consisting of a base fabric layer and a heat-resistant resin coating layer. The base fabric provides cushioning properties while the heat-resistant resin coating (containing polyimide resin and inorganic filler) provides thermal stability at 280°C or higher, creating a material that combines both cushioning and heat resistance.
Solution Approach 2:
The invention changes the chemical composition and physical structure of the cushioning material by applying a resin coating to the base fabric. This parameter change transforms the material from pure rubber (which deteriorates at high temperature) to a composite material with enhanced thermal stability while retaining cushioning properties.
2Temperature
If conventional cushion materials are used for high-temperature pressing, then heat resistance is improved, but cushioning properties deteriorate and layers separate
Solution Approach 1:
The invention creates a multi-layer composite structure where the base fabric and resin coating are chemically bonded. The resin coating contains polyimide resin and inorganic filler that form a stable composite structure resistant to layer separation at high temperatures, while the bonding between layers prevents delamination.
Solution Approach 2:
The invention applies different materials to different parts of the cushioning structure: the base fabric provides bulk cushioning while the resin coating applied to its surface provides heat resistance and anti-adhesion properties. This local differentiation of material properties solves the contradiction between heat resistance and structural 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 cushion material maintains good cushioning properties even after repeated use at temperatures of 280°C or more, with improved durability and heat transfer properties.
Implementation Method 1
polyimide resin adhered to surfaces of fibers forming the woven fabric
Implementation Method 2
heat transfer properties for transferring heat from the heating platens 13 to the workpiece 12 to be pressed efficiently
Data Source
AI summary
There is provided a cushion material 10 for hot pressing including a cushion layer 1, wherein the cushion layer 1 includes woven fabric 5 and polyimide resin 6 adhered to surfaces of fibers forming the woven fabric 5 and has pores in the cushion layer 1, and warp and/or weft of the woven fabric 5 is texturized yarns made of glass fiber. This cushion material for hot pressing can maintain good cushioning properties even when used in high temperature pressing at 280° C. or more repeatedly.