Press Pad Heat Conductivity via Organically Modified Siloxane Dispersion
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Solution Overview
Problem
Existing press pad materials face challenges in evenly distributing heat-conductive additives due to high viscosity, leading to uneven heat distribution and brittleness, which degrades reset capabilities and heat conductivity.
Innovation Solution
Dispersing additives in an organically modified siloxane, specifically with a comb or block structure, to improve distribution and tensile strength, and using metal core threads for enhanced heat conduction, along with surface treatment of additives for better compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If metal powder or carbon additives are introduced into the elastomeric matrix before crosslinking, then heat conductivity is improved, but the additives are distributed unevenly due to high viscosity and the Shore hardness increases enormously causing brittleness
Solution Approach 1:
The patent introduces an organically modified siloxane as an intermediary carrier substance. This siloxane has lower viscosity than the base elastomeric matrix, allowing heat-conductive additives (metal powder, carbon, graphite) to be dispersed uniformly throughout the mixture before crosslinking. The organically modified siloxane acts as a mediator that facilitates even distribution of additives while maintaining processability, solving the contradiction between improving heat conductivity and achieving uniform additive distribution.
2Temperature
If metal powder or carbon additives are introduced into the elastomeric matrix before crosslinking, then heat conductivity is improved, but the Shore hardness increases enormously degrading reset capabilities
Solution Approach 1:
The patent changes the physical and chemical parameters of the elastomeric matrix by incorporating organically modified siloxane with specific molecular structures (comb or block structures). This modification alters the matrix properties to reduce the negative impact of heat-conductive additives on Shore hardness. The organically modified siloxane provides a softer, more flexible matrix that maintains reset capabilities while still allowing the additives to improve heat conductivity.
3Temperature
If conventional elastomeric matrix is used with heat conductive additives, then heat conductivity can be improved, but the high viscosity makes it difficult to introduce powdery additives evenly
Solution Approach 1:
The patent segments the elastomeric matrix system into two components: the base elastomeric matrix and the organically modified siloxane carrier. By separating the additive dispersion function into the siloxane component, the system allows easier introduction and uniform distribution of powdery additives. The siloxane acts as a separate, more manageable phase that can be mixed with additives before being incorporated into the main matrix, simplifying the manufacturing process.
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
Achieves even heat distribution and improved reset properties by significantly increasing heat conductivity while maintaining material flexibility, with specific examples showing heat conductivity values up to 0.8 W/mK and reduced Shore hardness for enhanced performance.
Implementation Method 1
the additive is dispersed in an organically modified siloxane and introduced into the elastomeric matrix by the organically modified siloxane
Implementation Method 2
the core thread is made from metal. This further improves heat conduction of the press pad
Implementation Method 3
the press pad is produced from the fabric or the high temperature resistant elastomeric matrix with the additive is coated onto a fabric with weft threads and/or warp threads and subsequently crosslinked
Data Source
AI summary
A thread made from extruded silicone rubber that is cross-linked after the extrusion and woven into a fabric having warp threads and/or weft threads and a coating including cross-linked silicone rubber, the thread or the coating including a fluorinated rubber portion. The invention also relates to a method for producing such threads and woven fabrics. The object of the invention is to improve thermal and chemical resistance. To this end the fluorinated rubber part is produced only by surface fluorination of the cross-linked thread or the coating by means of a fluorinated gas.