Tire Component Release Layer for Curing Adhesion Control
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Solution Overview
Problem
The existing tire manufacturing process faces challenges with unwanted adhesion between the inner liner or body ply and the rubber bladder due to heat and pressure, which can affect the integration of additional components like foam noise dampers and air barriers, and existing release agents may not provide adequate separation or compatibility with these components.
Innovation Solution
A tire component with a surface coated using a liquid release layer comprising silicone rubber latex and adhesive polymer latex, applied to the radially inward surface, which prevents adhesion during curing and allows for improved bonding with foam noise dampers and air barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a release agent is applied to prevent adhesion between the inner liner/body ply and rubber bladder, then separation is improved, but adhesion of additional components (foam noise damper, air barrier) is worsened
Solution Approach 1:
The invention changes the chemical parameters of the release agent by formulating it with specific silicone oils (polydimethylsiloxane, polyphenylsiloxane, or polyalkylsiloxane) at controlled concentrations (0.1-10% by weight). This parameter optimization allows the release agent to provide sufficient release properties during curing while maintaining compatibility with subsequent component adhesion processes.
Solution Approach 2:
The release agent is formulated as a composite material containing multiple silicone oil types with different molecular weights and chemical structures. This composite formulation creates a balanced surface chemistry that provides both release functionality and compatibility with adhesive bonding of additional components, resolving the contradiction between separation and adhesion.
2Strength
If heat and pressure are applied during curing to bond tire components, then bonding strength is improved, but unwanted adhesion between inner liner/body ply and rubber bladder increases
Solution Approach 1:
The release agent acts as an intermediary substance applied to the inner liner or body ply surface before curing. During heat and pressure application, this intermediary layer prevents direct contact and unwanted adhesion between the inner liner/body ply and rubber bladder, while still allowing controlled separation after curing. The silicone-based release agent maintains its protective function throughout the high-temperature curing process.
3Reliability
If existing release agents are used to prevent adhesion, then separation is improved, but compatibility with foam noise dampers and air barriers is worsened
Solution Approach 1:
The invention optimizes the chemical parameters of the release agent by selecting specific silicone oil types (polydimethylsiloxane, polyphenylsiloxane, polyalkylsiloxane) and controlling their molecular weights and concentrations. These parameter adjustments ensure compatibility with foam noise dampers and air barriers while maintaining effective release properties, thereby improving adaptability without sacrificing separation capability.
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 use of a silicone rubber and adhesive polymer latex release layer effectively prevents adhesion between tire components during curing, enabling easier separation and ensuring satisfactory adhesion of pressure-sensitive adhesives, thus improving the integration and performance of additional tire components.
Implementation Method 1
coating the lower surface of the tire component with the liquid mixture to provide a release layer thereon
Data Source
AI summary
Disclosed herein are a tire comprising at least one component having a surface coated with a liquid release layer, a process for preparing a tire having at least one component with a surface coated with a release layer, and a cured tire comprising a tire body at least one component with a surface coated with a release layer. The release layer comprises at least one silicone rubber and at least one adhesive polymer which may be present in latex form in the liquid release layer.