Medical Polymer Tubing FAQs
Answers for design engineers, quality teams and sourcing professionals evaluating custom PTFE, FEP and Pebax tubing. Product feasibility, documentation and lead time are confirmed against the drawing, material, quantity and purchase requirements.
Quotations and drawing review
What information should I send for a quotation?
Send the drawing or target ID, OD, wall, length and tolerances; material or resin grade; intended application and manufacturing step; prototype and annual quantities; packaging, inspection and documentation needs; destination and target date.
Can Aokeray review a project before the drawing is final?
Yes. Mark which dimensions and materials are fixed and which may change. A preliminary discussion can identify feasibility questions, but production acceptance should use an approved drawing or agreed specification.
Can I send confidential drawings?
Use the drawing-review form and indicate that an NDA is required before detailed disclosure. Do not submit patient data or protected health information.
Materials and product selection
What does “medical-grade tubing” mean?
The term should be tied to a named resin, component specification, manufacturing controls and documentation package. It does not mean that an unqualified tube is approved for every medical device or clinical use.
When should I choose PTFE tubing?
PTFE is commonly evaluated for a low-friction lumen or fluoropolymer resistance. Select between general medical PTFE tubing, an ultra-thin liner, an etched bonding surface or heat-shrink tubing according to function.
When should I choose FEP heat-shrink tubing?
FEP heat-shrink may be evaluated as a clear fluoropolymer processing sleeve. Selection requires expanded ID, recovered ID, wall, assembly profile and a validated heat cycle.
How should Pebax tubing be specified?
Use the exact resin grade, dimensions, tolerances, color or filler, geometry and assembly process. Shore hardness alone is not a complete specification.
Etching, bonding and assembly
Does etched PTFE guarantee adhesion?
No. Etching changes the specified PTFE surface, but bond strength depends on the adjoining materials, cleanliness, geometry and complete lamination process. Define the treated side, surface acceptance method and bond test.
Does a tie layer prevent delamination?
No single tie layer can guarantee every construction. The liner surface, tie-layer material, jacket grade, reinforcement, heat cycle and test method must be evaluated together.
Should the ID or OD of a PTFE liner be etched?
The drawing must identify the treated side. Many catheter constructions keep the ID natural for a low-friction lumen and treat the OD for bonding, but the correct choice depends on the design.
Heat-shrink tubing
Is shrink ratio enough to select a heat-shrink tube?
No. Provide expanded ID, recovered ID, wall, assembly OD profile, loading clearance, material and process-temperature limits.
Can one heating condition be used for every assembly?
No. Heat source, airflow, dwell time, tube size, underlying polymers, adhesives and assembly geometry affect the process. Validate the actual equipment and materials.
Dimensions, inspection and quality documents
Can the same tolerance be used for every tube size?
No. Capability depends on material, dimensions, wall, length, geometry and measurement method. Confirm each drawing requirement during feasibility review.
Which quality documents are available?
Availability is product-, material- and order-specific. The quotation or quality agreement should state the exact material identification, conformity, inspection, lot, packaging or other records to be supplied.
Does a resin document cover the finished tubing?
Not automatically. A resin document applies to the named material and stated scope. Extrusion, additives, processing, handling, packaging and final-device manufacturing may introduce separate requirements.
Who validates biocompatibility and sterilization?
Final device biocompatibility, sterilization compatibility and performance remain the device manufacturer’s responsibility unless a separate written agreement defines another scope.
Samples, production and packaging
Can I request prototype samples?
Yes. Provide the drawing, intended evaluation, quantity and target timing. Aokeray will confirm feasibility, material, tooling if required, commercial terms and available documents.
How should packaging be specified?
State straight, coil, spool or cut-length presentation; quantity per bag; cleanliness; labels; lot identification; and any protection needed to prevent deformation or surface damage.
Still have a project-specific question?
Send the drawing, dimensions, material, process and quality requirements for review.