The rubber components of rubber track pads include tread-side adhesive, primer, fabric-cord adhesive, and fabric-layer adhesive, among others.
　　(1) Pattern-side adhesive
　　The tread-side rubber prevents mechanical damage and early deterioration of the belt body, transmits the driving and braking torque from the vehicle to the ground, and absorbs vibrations generated during the movement of the rubber track segments. The running surface of the tread-side rubber consists of tread blocks and grooves with various patterns, including parallel, single-ladder, double-ladder, and herringbone designs. The selection of tread-block types and their corresponding height dimensions should be based on geological conditions and aimed at maximizing traction efficiency, while also taking cost considerations into account. The structural design should minimize stress concentrations, enhance crack resistance, reduce the ingress of gravel and sand into the tread blocks—which can lead to premature rubber degradation—and ensure excellent wear resistance, puncture resistance, tear resistance, prevention of block shedding, flexural resistance, and resistance to aging.
　　(2) Primer
　　The primer is applied as the next layer beneath the tread-side adhesive and serves to cushion vibrations and impacts. During use, the rubber track blocks cause the primer to undergo continuous deformation, generating significant heat. Therefore, the primer must exhibit low thermal generation, high thermal conductivity, high elasticity, and excellent adhesion performance.
　　(3) Curtain adhesive and fabric layer adhesive
　　The fabric curtain adhesive should exhibit high toughness and flexibility, good thermal conductivity and sealing performance, dynamic performance, high-temperature resistance, and excellent adhesion to the skeletal materials. The fabric layer adhesive should have good adhesion to the fabric curtain adhesive and also possess favorable calendering processability.
　　The track is a critical component of excavator mobility systems and is commonly categorized into two types: rubber tracks and steel tracks. Rubber track segments are often used on small- and medium-sized mini-excavators, while steel tracks are typically employed on medium- and large-sized excavators. These two types of tracks differ from each other and can better perform their functions in various working environments.
　　Steel tracks are made from robust raw materials and consist of many small segments. As a result, they have a relatively wider range of applications and longer service life, and they offer greater flexibility in terms of operational conditions. These tracks exhibit excellent wear resistance and possess sufficient strength and rigidity, making them commonly used in challenging environments such as mountainous regions and mines. Thanks to their superior adhesion to the ground, steel tracks can ensure adequate power transmission and reduce friction during driving and turning. However, their heavy weight can easily damage the ground surface. During operation, the friction between the wheels and the tracks is predominantly between cast iron components and steel parts, leading to significant vibration and high noise levels.
　　When comparing the two, each has its own advantages and disadvantages. When selecting machinery, you should make your decision based on the actual requirements of the planing work—never blindly follow trends or dismiss any particular piece of equipment.