Air Spring Bellows Layer Structure for Low Air Diffusion

The patent applies composite materials by combining butyl elastomer (for diffusion-tight sealing) with chloroprene rubber or natural rubber (for adhesion to cord fabric). This composite structure resolves the contradiction by integrating two materials with complementary properties: one optimized for preventing air diffusion and the other for strong adhesion, thereby achieving both reliable pneumatic sealing and effective fabric bonding without air losses.

The patent implements local quality by creating distinct layers with specialized functions: the inner lining layer uses butyl elastomer specifically for diffusion-tight sealing where pneumatic integrity is critical, while the outer layers use chloroprene rubber or natural rubber where adhesion to cord fabric and mechanical flexibility are prioritized. This localized material assignment optimizes each region for its specific functional requirement, resolving the sealing-adhesion contradiction.

The patent applies segmentation by dividing the bellows structure into multiple functional layers: an inner lining layer with butyl elastomer for sealing, intermediate layers with chloroprene rubber or natural rubber for adhesion and flexibility, and outer reinforcement layers with cord fabric for mechanical strength. This segmentation allows each layer to specialize in a specific function, extending service life by preventing air losses and distributing deformation loads, while the modular layered approach maintains manufacturability through standardized production processes.

The patent uses composite materials to extend service life by combining butyl elastomer's superior diffusion resistance with chloroprene rubber's excellent adhesion and tear strength. This composite construction creates a bellows structure that simultaneously achieves pneumatic integrity, mechanical durability, and flexibility, resolving the contradiction between extended service life and structural complexity through synergistic material combinations.

The patent replaces chemical adhesion promoters with mechanical interlocking between layers. The cord fabric reinforcement layers physically interlock with the elastomeric layers through embedding and bonding, creating strong mechanical bonds without requiring additional chemical adhesives. This substitution eliminates harmful chemical substances from the production process while maintaining or enhancing layer adhesion strength through purely physical bonding mechanisms.

The patent implements self-service by allowing the elastomeric materials themselves to provide adhesion functionality through their inherent bonding properties to cord fabric, eliminating the need for separate adhesion promoter chemicals. The butyl elastomer and chloroprene rubber/natural rubber layers naturally bond to the reinforcement fabrics during the vulcanization process, achieving strong adhesion through the materials' own characteristics rather than external chemical agents, thereby reducing environmental pollution.