Fluoroelastomer Sealing Composition for Fast Mixing and Sheeting
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Solution Overview
Problem
Conventional crosslinkable fluoroelastomer compositions used in sealing materials, especially those involving liquid or oily components, require a long time to achieve uniformity and exhibit poor moldability, making it challenging to form high-quality sealing materials with desired physical properties.
Innovation Solution
A composition comprising a crosslinkable fluoroelastomer with 69% fluorine content or more, combined with another crosslinkable fluoroelastomer having a fluorine content between 66% and 68%, along with ethylenically unsaturated bond-containing compounds and a crosslinking agent, which can be quickly mixed and processed to produce a sealing material with improved sheeting properties and balanced physical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional crosslinkable fluoroelastomer with liquid or oily components is used, then the sealing material exhibits desired physical properties, but it takes a long time to achieve uniform mixing in the elastomer composition
Solution Approach 1:
The invention changes the fluorine content parameter of the crosslinkable fluoroelastomer to 69% by mass or more, which fundamentally alters the material's properties. This parameter change enables the elastomer composition to achieve uniform mixing in a short time while maintaining the desired physical properties of the sealing material, thus resolving the contradiction between reliability and time loss.
2Ease of manufacture
If a conventional elastomer composition is used, then the sealing material can be produced, but the composition does not catch well between rolls or wind well around rolls during sheeting, resulting in poor sheeting property
Solution Approach 1:
The invention applies parameter changes by setting the fluorine content of the crosslinkable fluoroelastomer to 69% by mass or more. This parameter change fundamentally improves the sheeting property, enabling the elastomer composition to catch well between rolls and wind well around rolls during the sheeting process, thus resolving the contradiction between ease of manufacture and manufacturing precision.
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 proposed composition allows for the rapid formation of a uniform elastomer composition with enhanced moldability, resulting in sealing materials that exhibit excellent hardness, tensile strength, elongation at break, and plasma resistance, while minimizing defects during the sheeting process.
Implementation Method 1
the fluoroelastomers (A1) and (A2) are peroxide-crosslinkable fluoroelastomers
Implementation Method 2
A method for producing a sealing material, including a step of irradiating the elastomer composition according to any one of [1] to 5 with radiation
Data Source
AI summary
One embodiment of the present invention relates to an elastomer composition, a sealing material, or a method for producing a sealing material, in which the elastomer composition includes a crosslinkable fluoroelastomer (A1) that is other than a perfluoroelastomer and has a fluorine content of 69% by mass or more and a crosslinkable fluoroelastomer (A2) that is other than a perfluoroelastomer and has a fluorine content in a range of 66 to 68% by mass.