Adhesive composition for organic fiber, method for treating organic fiber, organic fiber, and tire
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Solution Overview
Problem
Polyester fibers used in tires exhibit significant decrease in adhesiveness to rubber when exposed to high temperatures, leading to insufficient heat-resistant adhesiveness and high-speed durability compared to nylon fibers.
Innovation Solution
An adhesive composition for organic fibers containing sorbitol polyglycidyl ether with a chlorine content not exceeding 9.6% and blocked isocyanate is used, along with a resorcin-formalin-rubber latex treatment, to enhance heat-resistant adhesiveness and high-speed durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polyester fiber is used as reinforcing material for tire, then excellent dynamic properties and dimensional stability are achieved, but adhesive force to rubber decreases significantly when exposed to high temperatures
Solution Approach 1:
The patent changes the chemical parameters of the adhesive treatment by using a specific epoxy compound (sorbitol polyglycidyl ether with chlorine content ≤9.6%) combined with blocked isocyanate. This parameter optimization resolves the contradiction by maintaining adhesive force at high temperatures, achieving heat-resistant adhesiveness while preserving the inherent dynamic properties and dimensional stability of polyester fiber.
Solution Approach 2:
The patent creates a composite adhesive system by combining epoxy compound and blocked isocyanate in specific proportions. This composite material approach allows the adhesive treatment to simultaneously provide heat resistance and maintain strong bonding to rubber, resolving the contradiction between temperature resistance and adhesive reliability.
2Strength
If conventional adhesive treatment is applied to polyester fiber, then initial adhesive force is achieved, but adhesive force deteriorates under high temperature conditions
Solution Approach 1:
The patent optimizes the chemical composition parameters of the adhesive treatment, specifically using epoxy compound with controlled chlorine content (≤9.6%) and blocked isocyanate in defined ratios. This parameter control ensures the adhesive maintains strength across a wide temperature range, preventing deterioration under high temperature while achieving strong initial adhesion.
3Temperature
If nylon fiber is used instead of polyester fiber, then heat-resistant adhesiveness is improved, but dynamic properties and dimensional stability are compromised
Solution Approach 1:
The patent segments the functional requirements by assigning different properties to different components: polyester fiber provides dimensional stability and dynamic properties, while the specially formulated adhesive treatment (epoxy compound with blocked isocyanate) provides heat-resistant adhesiveness. This segmentation allows both requirements to be satisfied simultaneously without compromise.
Solution Approach 2:
The patent introduces an intermediary adhesive treatment layer between the polyester fiber and rubber that mediates the interaction. This intermediary layer, composed of epoxy compound and blocked isocyanate, transfers and maintains adhesive force under high temperature conditions while allowing the polyester fiber to retain its inherent dimensional stability and dynamic properties.
4Productivity
If polyester fiber is used in high-speed or high-load environment, then cost and processing advantages are achieved, but high-speed durability is insufficient
Solution Approach 1:
The patent changes the adhesive treatment parameters to achieve superior bonding performance that enables high-speed durability. The specific formulation (epoxy compound with chlorine content ≤9.6% and blocked isocyanate) creates a robust adhesive interface that withstands high-speed and high-load conditions, making polyester fiber viable for demanding applications while retaining its productivity advantages.
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 adhesive composition maintains high adhesive force between organic fibers and rubber at elevated temperatures, resulting in improved heat-resistant adhesiveness and high-speed durability for tires.
Implementation Method 1
treating the organic fiber with the adhesive composition for the organic fiber
Implementation Method 2
an adhesive composition for an organic fiber, the adhesive composition containing: (a) an epoxy compound that is a sorbitol polyglycidyl ether and has a chlorine content not greater than 9.6% by weight; and (b) a blocked isocyanate
Data Source
Figure 1
Figure 2
AI summary
An object of the present disclosure is to provide an adhesive composition for an organic fiber which has excellent heat-resistant adhesiveness that allows an organic fiber and a rubber composition to maintain high adhesive force even when being exposed to high temperatures. An adhesive composition for an organic fiber contains: (a) an epoxy compound that is a sorbitol polyglycidyl ether and has a chlorine content not greater than 9.6% by weight; and (b) a blocked isocyanate.