Bonding and Splicing
The NBR extrusion is cut to the required length and the two ends are joined to form a continuous sealing ring.
Depending on the product structure and application requirements, suitable joining processes may include:
- Adhesive bonding
- Cold splicing
- Hot splicing
- Vulcanized joining
The appropriate joining method should be selected according to the required joint strength, sealing conditions, production quantity and regulatory requirements.
The joint area can be inspected for:
- Alignment
- Joint strength
- Surface condition
- Diameter consistency
- Excess adhesive or flash
- Finished ring circumference
Food-Contact NBR Option
For applications where the sealing ring may come into contact with food, beverage ingredients or food-processing products, suitable food-contact NBR compounds can be evaluated according to the required application and regulatory standard.
Food-contact applications should be considered separately from standard industrial NBR because the rubber formulation, additives, curing system and joining materials may differ.
Before material selection, we recommend confirming:
- Type of food or beverage
- Contact temperature
- Contact duration
- Required regulatory standard
- Cleaning conditions
- Required oil or chemical resistance
Final compliance should be confirmed based on the selected compound, joining system and finished-product testing requirements.
Our Capability and Service
Tenchy has more than 18 years of experience in silicone and rubber sealing products, extrusion products and customized sealing solutions.
We can manufacture NBR sealing rings according to customer drawings, samples, lid grooves and actual application conditions.
Our services include:
- NBR material selection
- Extrusion profile development
- Solid and hollow extrusion production
- Controlled cut-to-length
- Bonding and splicing
- Ring circumference control
- Sample development
- Dimensional inspection
- Material and application evaluation
- Custom packaging
- Mass-production support
For industrial pail and container projects, our team can assist in evaluating the sealing ring according to the lid groove, compression requirement, filling media and operating environment.
Samples can be prepared for fitting, compression and sealing tests before mass production.
Suitable Media
Depending on the selected NBR formulation, the sealing ring may be suitable for contact with:
- Mineral oils
- Lubricating oils
- Grease
- Certain hydraulic oils
- Water
- Water-based paints
- Coatings
- Adhesives
- Other compatible industrial fluids
For food products, beverage additives, concentrated chemicals, solvents or special synthetic lubricants, material compatibility should be confirmed before mass production.
Installation
- Make sure the sealing groove is clean and free from contamination.
- Place the NBR sealing ring into the lid or container groove.
- Fit the ring evenly around the full circumference.
- Avoid twisting or excessive stretching during installation.
- Make sure the joint is seated correctly inside the groove.
- Check that the ring is installed evenly without local lifting or deformation.
- Close the lid and apply the required compression.
- Perform leakage or sealing tests when necessary.
No special installation tools are normally required for standard pail and bucket lid applications.
Quality Inspection
NBR spliced sealing rings can be inspected for:
- Extrusion outer diameter
- Inner diameter and wall thickness for hollow tubing
- Ring circumference
- Hardness
- Joint alignment
- Joint strength
- Surface defects
- Excess adhesive or flash
- Ring deformation
- Assembly fit
Additional material or performance testing can be arranged according to project requirements.
Packaging
Available packaging options include:
- Bulk PE bag packaging
- Fixed quantity per bag
- Fixed quantity per carton
- Individual PE bag packaging
- Custom labels
- Customer part-number labels
- Customized cartons
- Export packaging for bulk orders
Packaging quantities and methods can be customized according to the customer’s production and assembly requirements.
