Pneumatic Tire Sound Absorber Bonding for Heat and Noise Control
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Solution Overview
Problem
Existing methods for reducing cavernous resonance-induced tire noise and heat generation in pneumatic tires compromise high-speed durability due to the use of base materials in adhesive layers for sound absorbing members, which inhibit heat dissipation and generate heat.
Innovation Solution
A pneumatic tire design featuring a sound absorbing member fixed via an adhesive layer made of a solid pressure-sensitive adhesive without a base material, ensuring adequate adhesive strength and heat dissipation, with specific thickness and peeling strength to maintain durability and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a base material is included in the adhesive layer to directly attach the sound absorbing member to the tire inner surface, then the adhesive strength is improved, but heat dissipation is inhibited and heat generation increases
Solution Approach 1:
The invention extracts and removes the base material from the adhesive layer structure. By using only the pressure-sensitive adhesive without a base material support body, the harmful thermal insulation effect is eliminated while retaining the necessary adhesive function through optimized adhesive composition and thickness (0.05-5.00 mm).
Solution Approach 2:
The invention changes the physical parameters of the adhesive layer by specifying a thickness range (0.05-5.00 mm) and minimum peeling adhesive strength (5 N/20 mm or greater). These parameter optimizations ensure sufficient adhesive strength without the thermal insulation problem caused by base materials.
2Strength
If the adhesive layer thickness is increased to improve adhesive strength, then the fixing strength is improved, but heat dissipation is further inhibited
Solution Approach 1:
The invention optimizes the adhesive layer thickness within a specific range (0.05-5.00 mm) to achieve the balance between adhesive strength and heat dissipation. This parameter optimization ensures sufficient fixing strength while minimizing thermal insulation effects, unlike conventional approaches that require thicker layers for strength.
Solution Approach 2:
The invention uses a composite adhesive formulation comprising specific components (polybutadiene rubber, styrene-butadiene rubber, and zinc oxide) in optimized ratios. This composite material provides enhanced adhesive strength at reduced thickness, thereby improving both fixing strength and heat dissipation simultaneously.
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
Prevents deterioration of high-speed durability by maintaining heat dissipation and adhesive strength, while effectively reducing noise through the use of a solid pressure-sensitive adhesive layer, enhancing noise performance and durability.
Implementation Method 1
a sound absorbing member is fixed via an adhesive layer to an inner surface of the tread portion along the tire circumferential direction, and the adhesive layer includes a solid pressure-sensitive adhesive without including a base material
Implementation Method 2
mounting a sound absorbing member made of a porous material such as sponge on an inner surface of a tread portion on a tire inner surface
Data Source
AI summary
A pneumatic tire comprises a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on opposite sides of the tread portion; and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction; wherein a sound absorbing member is fixed via an adhesive layer to an inner surface of the tread portion along the tire circumferential direction, and the adhesive layer comprises a solid pressure-sensitive adhesive without including a base material.