Polymer Tensile Strength in Manifold Design

As plastic becomes more and more the material of choice for machined plastic manifold blocks, polymer tensile strength becomes a very important mechanical property design criteria. Plumbing and component connections, typically utilize a threaded attachment mechanism. This attachment can result in high tensile stress on the plastic manifold block and result in the failure of what could be very expensive precision plastic components. We have seen these results when the wrong material is used in the manifold design.

Medical Plastic Manifold

Medical Plastic Manifold

Acrylic offers a cost effective plastic with high clarity after machining and polishing. This makes it desirable for manifold applications. However if you need a higher polymer tensile strength with good clarity, there are options that are far less brittle than Acrylic. Use our chart below along with full manifold design parameters to help you select the proper material.


Polymer Tensile Strength (psi)
Acrylic10,100
Polysulfone10,200
Ultem 100016,500
PEEK16,000


Connecticut Plastics has 30+ years of experience with the selection and precision machining of plastics, and we are always available to assist you with your application. Please contact us with any questions or to request a quote for your project.

Posted in Fluidic Manifolds, Plastic Part Design