CVR Tire Reinforcement Thermoplastic Shell High-Temp Stability
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Solution Overview
Problem
CVR single strands used in tire reinforcements experience structural collapse during manufacturing due to inadequate compression, bending, and transverse shear properties at high temperatures, limiting their effectiveness in pneumatic and non-pneumatic tire applications.
Innovation Solution
A multi-composite reinforcement comprising CVR single strands with a thermoset resin and a thermoplastic material layer, where the thermoplastic layer enhances the CVR's properties in compression, bending, and transverse shear, particularly at high temperatures, allowing for improved structural integrity and versatility in shaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If CVR single strands with thermoset resin are used for tire reinforcement, then weight is reduced and corrosion resistance is improved, but structural stability in compression and bending deteriorates at high temperatures
Solution Approach 1:
The invention uses a composite structure combining thermoset resin (for high temperature stability and low weight) with thermoplastic material (for compression and bending strength). This multi-material composite resolves the contradiction by leveraging the complementary properties of each material: the thermoset resin provides weight reduction and corrosion resistance, while the thermoplastic layer enhances structural stability under compressive and bending loads at high temperatures.
Solution Approach 2:
The invention applies different materials to different functional requirements within the same reinforcement structure. The thermoset resin matrix provides the base properties of lightweight and corrosion resistance, while the thermoplastic material is specifically applied to enhance compression and bending properties where needed. This local differentiation of material properties resolves the contradiction between weight reduction and compressive strength.
2Reliability
If CVR single strands are used to replace metal wires, then corrosion resistance is improved, but structural integrity during manufacturing deteriorates due to collapse under pressure
Solution Approach 1:
The composite structure combines thermoset resin (providing corrosion resistance) with thermoplastic material (providing structural integrity during manufacturing). The thermoplastic layer acts as a protective shell that maintains the structural integrity of the CVR strands during the high-pressure manufacturing process, preventing collapse while preserving the corrosion-resistant properties of the underlying thermoset resin structure.
Solution Approach 2:
The thermoplastic material layer serves as a protective cushion that prevents structural collapse of the CVR strands during manufacturing. This protective layer is applied beforehand to anticipate and prevent the harmful effect of pressure-induced collapse during the manufacturing process, allowing the strands to maintain their structural integrity throughout production.
3Temperature
If thermoset resin with high Tg is used, then high temperature stability is improved, but processability and shaping versatility deteriorate
Solution Approach 1:
The invention uses different materials for different functional requirements: the thermoset resin matrix provides high temperature stability with its high glass transition temperature, while the thermoplastic material layer provides processability and shaping versatility. This local differentiation allows the reinforcement to achieve both high temperature stability and ease of shaping by applying the thermoplastic material specifically where processing flexibility is needed.
Solution Approach 2:
The invention changes the material parameters by combining materials with different thermal properties. The thermoset resin maintains high temperature stability through its high Tg, while the thermoplastic material enables easier processing and shaping at lower temperatures. This parameter differentiation across layers resolves the contradiction between high temperature stability and processability.
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 multi-composite reinforcement exhibits enhanced mechanical and thermal stability, enabling improved endurance and reduced weight in tire applications, with increased elongation at break and modulus, and reduced risk of structural collapse during manufacturing.
Implementation Method 1
a layer of a thermoplastic material (12) whose glass transition temperature noted Tg 2 is above 20°C. The thermoplastic and therefore thermofusible character of the material covering each single strand in CVR, very advantageously makes it possible to manufacture, in a way by 'bonding or thermal assembly', a wide variety of multi-composite reinforcements
Implementation Method 2
one or more single strand(s) (10) made of glass-resin composite (abbreviated 'CVR') comprising glass filaments (101) embedded in a thermoset resin (102) whose glass transition temperature noted Tg 1 is greater than 150°C
Data Source
Figure 1~2b
Figure 3~4
Figure 5~6
AI summary
A multi-composite reinforcement (R1, R2) having improved mechanical properties, comprising at least: one or a plurality of glass/resin composite monofilament(s) (10) comprising glass filaments (101) embedded in a thermoset resin (102) of which the glass transition temperature denoted by Tg1 is greater than 150°C; covering said or each monofilament individually, or a plurality of monofilaments together, a layer of a thermoplastic material (12) of which the glass transition temperature denoted by Tg2 is greater than 20°C. A multilayer laminate comprising such a multi-composite reinforcement. Pneumatic or non-pneumatic tyres reinforced with such a multi-composite reinforcement or multilayer laminate.