Non-pneumatic Tire Adhesion via Amine Pretreatment
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Solution Overview
Problem
Conventional non-pneumatic tires face difficulties in achieving adequate adhesiveness between the resin support structure and the tread layer, which affects the tire's running function, especially when the resin member has poor adhesiveness to the rubber member.
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 made of synthetic resin materials like PBT, PPS, and PC, and the surface is pretreated with an amine compound, with an epoxy-based adhesive layer between the tread member and the outer cylinder to enhance adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support structure is made of resin material, then the tire can function as a non-pneumatic tire without pressurized air, but the adhesiveness to the rubber tread layer becomes poor
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 amino groups on the resin surface that enhance subsequent adhesion to the rubber tread layer, resolving the poor adhesiveness issue while maintaining the non-pneumatic tire function
Solution Approach 2:
An adhesion layer containing an epoxy-based adhesive agent is introduced between the resin outer cylinder and the rubber tread layer. This intermediary adhesive layer chemically bonds to both the amine-treated resin surface and the rubber, significantly improving the interfacial strength and adhesion between the dissimilar materials
2Strength
If the adhesion strength is improved through surface treatment and adhesive agents, then the bonding between support structure and tread layer is enhanced, but the complexity of the manufacturing process 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 adhesion. This systematic approach integrates multiple functions (surface activation, adhesion promotion) into a streamlined manufacturing sequence, improving bond strength while managing process complexity
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 necessary running function by ensuring strong adhesion strength at both room and high temperatures, with surface roughness and pretreatment methods further enhancing bonding performance.
Implementation Method 1
an outer circumferential surface of the outer cylinder of the ring member facing the thread member is pretreated with an amine compound, and an adhesion layer containing an epoxy-based adhesive agent is located between the tread member and the outer cylinder of the ring member, the outer cylinder having an amino group in a surface thereof
Implementation Method 2
an adhesion layer containing an epoxy-based adhesive agent is located between the tread member and the outer cylinder of the ring member
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 an epoxy-based adhesive agent is located between the tread member (16) and the outer cylinder (13) having an amino group in a surface thereof.