Non-Pneumatic Tire Adhesion via Amine Pretreatment
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Solution Overview
Problem
Conventional non-pneumatic tires face challenges in achieving sufficient adhesiveness between the resin support structure and the rubber tread layer, particularly when the resin member has poor adhesiveness, which affects the tire's running function.
Innovation Solution
A non-pneumatic tire design featuring a ring member with an inner and outer cylinder connected by elastic connecting plates, where the outer cylinder is pretreated with an amine compound and bonded to a vulcanized rubber tread member using a cyanoacrylate-based adhesive, enhancing adhesion with synthetic resin materials like polyphenylene sulfide and polycarbonate, and optimizing surface roughness for improved anchor effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin member is used to form the support structure, then the tire does not require pressurized air and puncture resistance is improved, but adhesiveness to the rubber tread layer deteriorates
Solution Approach 1:
The outer circumferential surface of the outer cylinder is pretreated with an amine compound before bonding the tread layer. This preliminary surface treatment creates reactive amino groups on the resin surface, which significantly improves the adhesiveness between the resin support structure and the rubber tread layer, resolving the adhesion problem while maintaining puncture resistance
Solution Approach 2:
An adhesion layer containing a cyanoacrylate-based adhesive agent is introduced between the resin outer cylinder and the rubber tread layer. This intermediary layer acts as a chemical bridge, forming strong bonds with both the amine-treated resin surface and the rubber, thereby solving the adhesion issue without compromising the puncture-resistant property of the resin structure
2Strength
If the adhesion strength is improved through surface treatment and adhesive layers, then the bonding between support structure and tread layer is enhanced, but the manufacturing process complexity increases
Solution Approach 1:
The amine compound surface treatment is performed as a preliminary step before adhesive application, creating a chemically active surface that enhances adhesive bonding. This systematic approach, while adding steps, ensures reliable adhesion and can be integrated into existing manufacturing workflows
Solution Approach 2:
The adhesion layer serves as a mediator that simplifies the overall bonding process by providing a dedicated interface between the resin and rubber. This layered approach allows each material to be optimized independently while ensuring strong interfacial bonding, making the manufacturing process more controllable and reliable
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 design significantly improves adhesiveness and maintains strong bonding at both room and elevated temperatures, ensuring the tire's necessary running function and shock resistance.
Implementation Method 1
an outer circumferential surface of the outer cylinder (13) of the ring member (14) facing the thread member (16) is pretreated with an amine compound
Implementation Method 2
an adhesion layer (25) containing a cyanoacrylate-based adhesive agent is located between the tread member (16) and the outer cylinder (13) of the ring member (14)
Implementation Method 3
a plurality of connecting members (15) arranged along a tire circumferential direction between the inner cylinder (12) and the outer cylinder (13) and connecting the inner cylinder (12) and the outer cylinder (13) to each other
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A non-pneumatic tire includes:a ring member (14) including an inner cylinder (12) externally covering an attachment body (11) to be attached to an axle and an outer cylinder (13) surrounding the inner cylinder (12) from a tire radial outer side; a plurality of connecting members (15) arranged along a tire circumferential direction between the inner cylinder (12) and the outer cylinder (13) and connecting the two cylinders to each other; and a tread member (16) made of vulcanized rubber and located on a tire radial outer side of the outer cylinder (13), wherein at least one part of the outer cylinder (13) and the plurality of connecting members (15) are integrally formed of a synthetic resin material, and an adhesion layer (25) containing a cyanoacrylate-based adhesive agent is located between the tread member (16) and the outer cylinder (13) having an amino group in a surface thereof.