Modern medical devices are shrinking. The tubing inside them is getting smaller, thinner and more complex. Connecting that tubing shouldn't have to get harder.
From minimally invasive surgical instruments and infusion systems to dialysis equipment, drainage systems and advanced catheter assemblies, today's medical devices are packing more functionality into smaller footprints.
That means medical tubing is changing, too.
Manufacturers are working with smaller inner and outer diameters, thinner walls and multi-lumen designs that can carry fluids, gases, guidewires and other components through a single tube.
The engineering is impressive.
The assembly challenge is real.
When thin-wall silicone tubing needs to slide over a rigid barb or fitting, it can collapse, fold or resist insertion. Operators may have to apply significant force to make the connection, slowing production and potentially damaging the tubing.
And when the connection is part of a critical medical device, "good enough" isn't good enough.
The Connection Matters
A tubing connection needs to be secure, consistent and leak-free.
But silicone presents a unique assembly challenge. It is flexible and durable, but its tacky surface creates friction against rigid fittings. Thin-wall tubing can be particularly difficult to handle because it lacks the structural rigidity needed to push it over a connector without deforming.
Manufacturers have traditionally turned to methods such as alcohol, silicone oil or aggressive solvents to make assembly easier.
Each has trade-offs.
IPA can provide temporary lubrication, but it can take time to evaporate and may not provide enough assistance for very thin tubing.
Silicone oils can make assembly easier, but they remain on surfaces, can migrate through the manufacturing environment and may complicate cleaning and handling.
Hexane can swell silicone effectively, but it is an aggressive solvent with significant handling and material-compatibility considerations.
There is another approach.
Swelling Makes the Connection Easier
Swellex™ Silicone Tubing Swelling Fluid is engineered specifically to help manufacturers assemble silicone tubing onto fittings and connectors.
Instead of simply lubricating the tubing, Swellex temporarily swells the silicone.
The process is simple: immerse the end of the tubing in Swellex, allow it to swell, and slide the expanded tubing over the fitting.
Because only a small dimensional increase may be needed, often just 1–2%, the swelling process can take less than a minute, depending on the application.
Once assembled, the tubing gradually returns to its original dimensions, creating a secure grip around the fitting.
The result is a connection that is easier to make without permanently changing the tubing.
Why It Matters for Modern Medical Manufacturing
As devices become more complex, manufacturers need assembly processes that can keep pace without adding unnecessary steps, force or variability.
Swellex can help:
From Simple Tubing to Sophisticated Medical Systems
The tubing itself may look simple.
The application often isn't.
A single device can incorporate silicone tubing alongside polycarbonate, polyurethane, metals, adhesives, coatings and electronics. Some tubing may carry fluids. Other channels may deliver gases or accommodate guidewires.
That makes fluid selection an important part of the assembly process.
The right swelling fluid should do its job selectively, helping expand the tubing without compromising the other materials surrounding it.
That's where technical expertise matters.
Swellex Is More Than a Fluid
MicroCare Medical works with manufacturers to understand the complete assembly challenge, not just the tubing.
For manufacturers developing the next generation of medical devices, small tubing shouldn't become a big production problem.
Swellex helps make difficult tubing connections easier, faster and more repeatable, giving manufacturers another tool for building sophisticated devices at scale.
Smaller devices demand smarter assembly.
Ask MicroCare Medical how Swellex can help.
From minimally invasive surgical instruments and infusion systems to dialysis equipment, drainage systems and advanced catheter assemblies, today's medical devices are packing more functionality into smaller footprints.
That means medical tubing is changing, too.
Manufacturers are working with smaller inner and outer diameters, thinner walls and multi-lumen designs that can carry fluids, gases, guidewires and other components through a single tube.
The engineering is impressive.
The assembly challenge is real.
When thin-wall silicone tubing needs to slide over a rigid barb or fitting, it can collapse, fold or resist insertion. Operators may have to apply significant force to make the connection, slowing production and potentially damaging the tubing.
And when the connection is part of a critical medical device, "good enough" isn't good enough.
The Connection Matters
A tubing connection needs to be secure, consistent and leak-free.
But silicone presents a unique assembly challenge. It is flexible and durable, but its tacky surface creates friction against rigid fittings. Thin-wall tubing can be particularly difficult to handle because it lacks the structural rigidity needed to push it over a connector without deforming.
Manufacturers have traditionally turned to methods such as alcohol, silicone oil or aggressive solvents to make assembly easier.
Each has trade-offs.
IPA can provide temporary lubrication, but it can take time to evaporate and may not provide enough assistance for very thin tubing.
Silicone oils can make assembly easier, but they remain on surfaces, can migrate through the manufacturing environment and may complicate cleaning and handling.
Hexane can swell silicone effectively, but it is an aggressive solvent with significant handling and material-compatibility considerations.
There is another approach.
Swelling Makes the Connection Easier
Swellex™ Silicone Tubing Swelling Fluid is engineered specifically to help manufacturers assemble silicone tubing onto fittings and connectors.
Instead of simply lubricating the tubing, Swellex temporarily swells the silicone.
The process is simple: immerse the end of the tubing in Swellex, allow it to swell, and slide the expanded tubing over the fitting.
Because only a small dimensional increase may be needed, often just 1–2%, the swelling process can take less than a minute, depending on the application.
Once assembled, the tubing gradually returns to its original dimensions, creating a secure grip around the fitting.
The result is a connection that is easier to make without permanently changing the tubing.
Why It Matters for Modern Medical Manufacturing
As devices become more complex, manufacturers need assembly processes that can keep pace without adding unnecessary steps, force or variability.
Swellex can help:
- Speed assembly: Make it easier to position thin-wall tubing over rigid fittings and connectors.
- Reduce assembly force: Temporarily expanding the tubing can reduce the effort required to make difficult connections.
- Protect delicate tubing: Less force can help reduce folding, tearing and other tubing damage during assembly.
- Support consistent connections: Predictable swelling helps manufacturers develop repeatable assembly processes.
- Simplify material compatibility: An engineered swelling fluid can be formulated to selectively interact with the tubing while minimizing impact on other device materials.
- Support validation: A controlled, repeatable process can be easier to qualify than an assembly method relying on excessive force, adhesives or uncontrolled solvents.
From Simple Tubing to Sophisticated Medical Systems
The tubing itself may look simple.
The application often isn't.
A single device can incorporate silicone tubing alongside polycarbonate, polyurethane, metals, adhesives, coatings and electronics. Some tubing may carry fluids. Other channels may deliver gases or accommodate guidewires.
That makes fluid selection an important part of the assembly process.
The right swelling fluid should do its job selectively, helping expand the tubing without compromising the other materials surrounding it.
That's where technical expertise matters.
Swellex Is More Than a Fluid
MicroCare Medical works with manufacturers to understand the complete assembly challenge, not just the tubing.
- What is the tubing material?
- How thin is the wall?
- What is the fitting geometry?
- How much expansion is needed?
- How quickly does the assembly need to happen?
- What other materials are present?
- What happens after assembly?
- How will the process be validated?
For manufacturers developing the next generation of medical devices, small tubing shouldn't become a big production problem.
Swellex helps make difficult tubing connections easier, faster and more repeatable, giving manufacturers another tool for building sophisticated devices at scale.
Smaller devices demand smarter assembly.
Ask MicroCare Medical how Swellex can help.