Dip-Coated Polyimide Tubing for Thin-Wall Precision Applications

WELLELE dip-coated polyimide tubing is formed by applying controlled polyimide layers to a mandrel, curing the coating and releasing the finished tube. It is used for thin-wall sensor insulation, precision capillaries, laboratory or diagnostic equipment components and compact electrical insulation.

Dip coating is selected by geometry and surface requirements rather than by a universal size claim. ID, coating build, wall uniformity, cure condition, lumen quality, pinholes, release marks and cleanliness should be defined for the exact product

Dip-Coated Polyimide Tubing

Dip-Coated Polyimide Tubing

  • Mandrel-defined inside geometry
  • Thin-wall, layer-built construction
  • Custom small-bore and capillary review
  • Surface, lumen and pinhole inspection options

Thin-wall construction

Suitable for compact precision assemblies

Smooth surface potentia

Suitable where surface condition matters

Mandrel-based geometry

Useful when ID and wall build need review

Small tube capability

Relevant for capillary and precision use

Layer-built structure

Wall thickness can be engineered by process

Custom review

Size, wall and surface are reviewed by project

Available dimensions and finished-tube performance depend on the selected material system, coating process, tooling, wall, tolerance and test conditions. Final requirements must be confirmed on the quotation, approved drawing and agreed validation plan.

Dip-Coated Polyimide Tubing – Project Specifications

Specification field Information to provide Confirmation method
Mandrel / lumen Target ID or mating-part dimensions and units Approved drawing
Wall and coating build Target or minimum wall and allowable variation Approved drawing and inspection method
Length and cut end Cut length, tolerance, end condition and cleanliness need Order specification
Surface / defects Appearance, pinhole, particulate or coating-defect criteria Agreed visual or test method
Application conditions Temperature exposure, electrical duty, medium and assembly method Engineering feasibility review
Validation Required standard, method, sample conditioning and acceptance criterion Approved test plan or quality agreement
Documentation Drawing, inspection record, CoC or other required document Confirmed before order acceptance

Material-reference values are not a finished-tube guarantee. Performance must be validated for the actual construction and service conditions.

Dip-Coated Polyimide Tubing FAQ

Choose it when thin wall, precision geometry, surface condition or coating-based construction is more important than using a wound film structure.

Wall non-uniformity, pinholes, cure variation, mandrel-release marks and surface defects should be reviewed.

It can be reviewed for defined medical-equipment, laboratory or in-vitro applications. Implantable or intravascular use requires separate qualification.

Select dip-coated polyimide tubing from the complete component dimensions, operating conditions, manufacturing process and acceptance criteria. Use samples to confirm fit and function before volume production

Not always. They are different structures. The correct choice depends on ID, wall, length, surface, tolerance and application.

The main risks are wall non-uniformity, pinholes, incomplete or variable cure, mandrel-release marks, surface defects, lumen blockage and cut-end damage. The inspection plan should focus on the risks that affect the end function.

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Prepare a Polyimide Tube RFQ

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