Diffusion Bonded Manifold

Diffusion Bonded Manifolds

Bonded Ultem Manifold
Sample designed bonded acrylic manifold

A diffusion bonded manifold is a thermoplastic fluidic device that concentrates many fluid paths into a small space on a single part, providing many advantages when controlling the flow of fluids through an application. These manifolds, also referred to as a fluidic hub, fluidic circuit, or plastic flowcell, are manufactured from multiple layers of machined plastic, which are then bonded together through a proprietary process involving heat and pressure. The resulting diffusion bonded manifolds are a critical component of any fluidic application, allowing precise control of flow in a contamination-free environment while simultaneously reducing assembly time and service costs, yet improving reliability.

Design Flexibility For Diffusion Bonded Manifolds

bonded acrylic well

Of the many advantages exhibited by a plastic diffusion bonded manifold, one of the most important has to be the ease of design flexibility. By utilizing multiple layers of material combined with precision machining, Piedmont CMG is capable of producing manifolds filled with intricate channels that control the flow of fluids through a device in almost any configuration required. These channels are milled directly into the bonded surface and retain their shape throughout the bonding process, so there is no need for inserting tubes or pipes to hold the desired channel shape. This equates to a reduction in parts, materials, weight, and cost.

Pneumatic Pathways in a Diffusion Bonded Plastic Pneumatic Manifold

Bonded Manifolds
Without Contaminants

Perhaps even more important for many modern applications is that the bonded channels will have no contamination from glues or solvents. Zero contamination is the perfect condition for applications such as medical, diagnostic, pharmaceutical, laboratory research, and clinical chemistry projects. In addition, almost all of the machining is done before the bonding process, so there is no risk of burrs or other defects being found within the channels.

Diffusion Bond & Material Strength

Several Examples of Plastic Diffusion Bonded Manifolds with Burr Free Pathways

Another key advantage of using diffusion bonding is simply the strength of the bond itself. By exposing a material to heat and pressure over time, a bond can be created at the molecular level. The resulting permanent bond is uniform and difficult to detect with the naked eye. A diffusion bonded part will exhibit essentially all the same thermal and chemical resistance properties as the base polymer. This allows for tough manifolds that can withstand repeated autoclaving or exposure to various temperature ranges and chemicals without the need for coating or reinforcement. These functional advantages, plus the added aesthetic appeal of a uniform, transparent manifold, are why many OEMs are choosing diffusion bonding over other methods, such as solvent bonding.

Multi-Layer Diffusion Bonded Manifold

How many layers does your diffusion bonded manifold require? Each manifold application and design has unique specifications to suit the needs of the instrument or device. Check out some select multi-layer diffusion bonded manifolds below to learn more or contact us anytime!

rotary valve bonded acrylic manifold
Two-Layer Diffusion Bonded Manifold
Two-Layer Rotary Valve Diffusion Bonded Manifold
4-layer bonded acrylic manifold
4-Layer Bonded Manifold
Four-Layer Diffusion Bonded Acrylic Manifold
3-layer bonded acrylic manifold
3-Layer Bonded Manifold
Three-Layer Diffusion Bonded Acrylic Manifold
5-layer acrylic manifold mixing channels
5-Layer Bonded Manifold
Five-Layer Diffusion Bonded Acrylic Manifold With Mixing Channels

Diffusion Bonded Manifold Quote

We’re available to help with engineering design, material selection, and even assembly or testing/validation considerations. We’ve made thousands of manifolds over the years, so we know the right questions to ask and the details that often get overlooked. If you’re looking for a partner who will take your bonded manifold project as seriously as you do, then look no further and contact us now to get the teamwork started.