Tire Member Manufacturing Method for Carbon Black Dispersion Stability
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Solution Overview
Problem
Existing tire member manufacturing methods fail to effectively inhibit the reflocculation of carbon black, which can alter the properties of tire components and lead to suboptimal performance.
Innovation Solution
A tire manufacturing method involving the use of a pre-coagulation rubber latex with carbon black having a specific surface area to iodine absorption ratio of not less than 1.00, where a compound according to Formula (I) is added and dispersed within the coagulum or mixture, facilitating the formation of bonds between carbon black and the compound, thereby inhibiting reflocculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mixing methods are used to combine carbon black and rubber, then the manufacturing process is simple, but carbon black reflocculation occurs and dispersion characteristics deteriorate over time
Solution Approach 1:
The compound according to Formula (I) is added to the rubber composition before final mixing and curing, allowing it to adsorb onto carbon black particles in advance. This preliminary action prevents carbon black reflocculation during storage and processing by establishing a protective interface layer before the carbon black has opportunity to aggregate
Solution Approach 2:
The compound according to Formula (I) acts as an intermediary substance between carbon black and rubber matrix. It adsorbs onto carbon black surface through its functional groups and provides compatibility with the rubber matrix, mediating the interface to prevent carbon black-reflocculation while maintaining dispersion
2Manufacturing precision
If carbon black is added to rubber without special treatment, then the manufacturing process is straightforward, but the dispersion characteristics of carbon black deteriorate over time due to reflocculation
Solution Approach 1:
The compound according to Formula (I) serves as a mediator that improves the interface between carbon black and rubber matrix. It adsorbs onto carbon black particles and provides rubber-compatible surface characteristics, achieving uniform dispersion without complex manufacturing procedures
Solution Approach 2:
The compound according to Formula (I) modifies the surface parameters of carbon black particles through adsorption. By changing the surface chemical properties and wettability of carbon black, it improves dispersion uniformity in the rubber matrix while maintaining straightforward manufacturing processes
3Reliability
If the compound according to Formula (I) is added to improve carbon black dispersion, then dispersion characteristics improve, but the manufacturing process becomes more complex
Solution Approach 1:
The compound according to Formula (I) performs multiple functions simultaneously: it acts as a dispersant for carbon black, a compatibilizer for the rubber matrix, and a stabilizer against reflocculation during storage. This multi-functionality achieves improved dispersion stability without requiring multiple separate additives or complex processing steps
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
This method achieves a high degree of carbon black dispersion and prevents reflocculation, improving the dispersion characteristics of the compound and maintaining the properties of tire components over time.
Implementation Method 1
the terminal nitrogen functional group bonds to carbon black and that the carbon-carbon double-bond portion bonds to polymer
Implementation Method 2
the terminal nitrogen functional group bonds to carbon black
Data Source
AI summary
A first tire member manufacturing method includes an operation in which a pre-coagulation rubber latex containing carbon black, for which a ratio of specific surface area as determined by nitrogen adsorption N2SA (in units of m2/g) to an amount of iodine absorption IA (in units of mg/g) is not less than 1.00, is coagulated to obtain a coagulum; an operation in which a compound according to Formula (I), below, is added to the water-containing coagulum; and an operation in which the compound according to Formula (I), below, is dispersed within the coagulum.In Formula (I), R1 and R2 each indicates a hydrogen atom, an alkyl group having 1 to 20 carbons, an alkenyl group having 1 to 20 carbons, or an alkynyl group having 1 to 20 carbons, R1 and R2 may be the same or different, and M+ indicates sodium ion, potassium ion, or lithium ion.