Product Overview
Uncured Intermediate Rubber (Tie Gum) for Conveyor Belt Hot Vulcanizing
Uncured Intermediate Rubber, commonly known as tie gum, is a critical material used in the hot vulcanizing process of conveyor belts. It serves as the bonding layer between new and old rubber components, acting as a chemical and physical adhesive that merges multiple layers of rubber into a single, cohesive structure during vulcanization.
When repairing, splicing, or fabricating rubber conveyor belts - especially in heavy-duty industrial environments such as mining, power generation, and cement production - uncured tie gum plays an irreplaceable role. It ensures the long-term strength, elasticity, and cohesion of the repair or splice, helping the belt regain its mechanical integrity.
Whether applied in conjunction with cover rubber, skim rubber, or fabric layers, uncured intermediate rubber provides the critical bonding strength needed for permanent and reliable repairs. It's an essential hot vulcanizing material for belt splicing experts and repair technicians.
Why Tie Gum Matters
Conveyor belts undergo extreme mechanical stress: tension, abrasion, and temperature variations. In the absence of a proper bonding layer like tie gum, even the most well-executed vulcanizing repair can fail prematurely.
Tie gum ensures:
- Secure adhesion between rubber layers during hot vulcanization
- Reinforced bonding in splices and repair patches
- Compatibility with both fabric and steel cord belt constructions
- Enhanced flexibility and fatigue resistance post-vulcanization
Key Features
Uncured Composition: Remains tacky until heat and pressure are applied.
High Tack and Flexibility: Adapts to surface texture, ensures seamless joining.
Temperature-Activated Bonding: Activates at 145°C–165°C.
Compatibility: Works with NR, SBR, NBR compounds and various belts.
Improved Durability: Enhances longevity and toughness of repairs.
Available in Rolls or Sheets: Ideal for field or workshop use.
Resists Aging and Oxidation: Long shelf life and anti-aging properties.
Technical Specifications
|
Property |
Specification |
|
Product Name |
Uncured Intermediate Rubber (Tie Gum) |
|
Color |
Black |
|
Appearance |
Smooth, uncured sheet or roll |
|
Material Base |
Natural/Synthetic Rubber Blend |
|
Thickness Range |
0.8/1/2/3/4/5 mm |
|
Width Options |
500mm, 1000mm |
|
Roll Weight |
10kg/roll, 20kg/roll |
|
Surface Finish |
Smooth |
|
Tensile Strength |
17-22 MPa |
|
Elongation at Break |
300%-500% |
|
Specific Gravity |
1.10–1.20g/cm³ |
|
Hardness (Shore A) |
50–60 |
|
Vulcanizing Temperature |
145°C–165°C |
|
Cure Time |
20–30 minutes |
|
Shelf Life |
Up to 12 months |
|
Storage Temperature |
Below 25℃, and in dry, cool and ventilated place. |
|
Packaging |
Poly-wrapped roll in carton |
Application Areas
Mining and Quarrying: For splicing and repairing belts exposed to high impact and abrasion.
Cement and Aggregate Plants: Provides robust splices in high-heat, abrasive environments.
Thermal Power Plants: Used in fly ash, coal, and bulk fuel handling belts.
Ports and Bulk Material Handling: Ensures strong, long-lasting joints in high-duty applications.
Recycling and Scrap Management: Supports targeted repairs in belts handling rough materials.
How to Use Tie Gum in Hot Vulcanizing
1. Prepare the surface: Clean, buff, and roughen the damaged area or splice zone.
2. Apply cement (if required): Use bonding cement compatible with tie gum and base rubber.
3. Layer the tie gum: Cut to size and place over the carcass or seam.
4. Overlay with cover rubber: Place uncured cover rubber on top.
5. Vulcanize: Use a hot vulcanizing press at 145–165°C for 20–30 minutes.
6. Cool and inspect: Let the joint cool under pressure, then inspect.
Advantages Summary
- Maximum adhesion and rubber compatibility
- Supports high-strength, permanent vulcanized joints
- Flexible, customizable formats
- Improves repair efficiency and belt performance
- Reduces downtime and maintenance frequency
- Widely used in all industrial belt repair kits
Packaging Options
- Roll-packed tie gum with protective film
- Pre-cut sheets for easy field use
- Vacuum-packed or aluminum-sealed for shelf life
- OEM branding and custom labeling available
Contact Us
Looking for reliable tie gum for your hot vulcanizing material supply chain?
We offer:
- Wholesale and retail supply
- OEM customization
- Fast global delivery
- Technical support and material compatibility guidance
Email: sales@yiqiconveyor.com
Phone: +8615110396140
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