Uncured Intermediate Rubber, also known as tie gum or uncured skim rubber, is expertly designed for hot vulcanized conveyor belt splicing. Engineered specifically as a bonding interlayer between steel cords or fabric layers within conveyor belts, it improves splice flexibility, durability, and longevity. It ensures maximum adhesion strength, enhancing conveyor belt splice integrity under demanding operational conditions
Description
Uncured Intermediate Rubber(tie gum) is primarily used in conveyor belt hot splicing processes, serving three essential functions: filling, bonding, and sealing. The uncured intermediate rubber material matches the conveyor belt’s base composition to ensure that post-vulcanization splice strength equals the belt body’s performance. During the hot splicing process under the combined action of heat (typically 140-160°C) and pressure (0.8-1.5 MPa) in a vulcanizing press:
The uncured intermediate rubber undergoes molecular cross-linking with both the belt’s rubber layers and reinforcement materials (steel cords/fabrics), and this creates an integrated three-dimensional network structure that: Enhances mechanical properties; Improves adaptability to complex operating conditions, and prevents operational failures (cracking, delamination) at the splice joint.
Advantage
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Enhances the working life of conveyor belt splicing
- Controlled cure characteristics: balanced scorch time and curing rate
- Superior adhesion: chemical bonding to diverse conveyor belt materials
- Mechanical harmony: hardness/elasticity matching conveyor belt specifications
- Durability: equivalent aging/chemical resistance to conveyor belt components
Features
Gap Filling & Structural Integration:
Tie gum fills all gaps and irregularities in the belt carcass at the splice, ensuring a dense, uniform, and continuous internal structure. This eliminates weak points and stress concentrations within the joint.
Superior Adhesion & Load Transmission:
Through vulcanization, skim rubber forms a chemical bond with both the original belt core rubber and adjacent tie gum layers, creating a robust interface. and it is responsible for distributing and transmitting tension and impact forces evenly across the joint, preventing local overloading and delamination.
Enhanced Mechanical Performance:
Manufactured with high-strength resilience formulations, quality tie gum delivers outstanding tensile and shear strength, as well as tear resistance, minimizing joint deformation and damage during operation.
Physical Characteristics:
Prioritizes high strength, toughness, and excellent adhesion
Application
The uncured intermediate rubber is an necessary component for: Steel Cord Conveyor Belt Splicing
Fabric Conveyor Belt Splicing
High-tension and High-wear Applications
Heavy Industry and Mining Operations.
