Method for producing a vehicle tire, vehicle tire produced according to the method, and use of treated reinforcing supports
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Solution Overview
Problem
The production of motor vehicle tires faces challenges in achieving adequate bonding between strengthening members and the surrounding rubberizing mixture, particularly under mechanical and dynamic stress, while avoiding the use of harmful substances like resorcinol and formaldehyde.
Innovation Solution
A method involving a bath composed of polycarboxylic acid, epoxy compound, polyisocyanate, and VP latex is used to activate textile strengthening members, allowing for effective bonding without the need for preactivation or the use of harmful substances, and enabling the production of tires with comparable service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFL dips and preactivation treatments are used to activate strengthening members, then bonding between strengthening members and rubberizing mixture is improved, but harmful substances (resorcinol and formaldehyde) are introduced into the production process
Solution Approach 1:
The invention extracts and removes the harmful substances (resorcinol and formaldehyde) from the activation bath while retaining the essential bonding function. The bath is reformulated to contain only epoxy compound, polyisocyanate compound, VP latex, and water, eliminating the harmful components while maintaining adequate bonding between strengthening members and rubberizing mixture.
Solution Approach 2:
The invention changes the chemical composition parameters of the activation bath by replacing resorcinol-formaldehyde-based compounds with alternative substances (epoxy compound, polyisocyanate compound, and VP latex). This parameter change eliminates harmful substances while preserving the bonding activation function through different chemical mechanisms.
2Reliability
If two different dips are used in succession to activate non-preactivated strengthening members, then adequate bonding is achieved, but the production process becomes more complex
Solution Approach 1:
The invention merges the functions of multiple dips into a single activation bath. The bath contains a combination of epoxy compound, polyisocyanate compound, and VP latex that work together to provide adequate bonding activation in one treatment step, eliminating the need for sequential dips and simplifying the production process.
Solution Approach 2:
The activation bath is designed with multi-functionality, serving as a universal treatment that can activate both preactivated and non-preactivated strengthening members adequately. The combination of epoxy compound, polyisocyanate compound, and VP latex provides comprehensive bonding activation in a single solution, replacing multiple specialized dips.
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 simplifies the tire production process, eliminates the use of harmful substances, and achieves strong and durable bonding between strengthening members and the rubberizing mixture, ensuring a comparable service life for the tires.
Implementation Method 1
adding at least one polycarboxylic acid to water; adding at least one base; adding at least one epoxy compound; adding at least one polyisocyanate compound; adding at least one VP latex; mixing the substances from b1) to b5)
Implementation Method 2
dipping the strengthening members from step a) in the bath from step b)
Implementation Method 3
achieve improved bonding to rubber mixtures in strengthening member plies of motor vehicle tyres
Data Source
AI summary
A method for producing a vehicle tire, having the following steps: a) providing textile reinforcing supports; b) providing a bath which is free of resorcin and formaldehyde by at least: b1) adding at least one carboxylic acid to water; b2) adding at least one base; b3) adding at least one epoxy compound; b4) adding at least one polyisocyanate compound; b5) adding at least one VP latex; and b6) mixing the substances from b1) to b5); c) dipping the reinforcing supports from step a) into the bath from step b); d) subsequently hot-stretching the dipped reinforcing supports from step c); and e) further processing the reinforcing supports from step d) in order to form a reinforcing support layer in a vehicle tire blank. A vehicle tire which is produced using the method and to the use of reinforcing supports treated in such a manner in technical rubber articles are also disclosed.