Black rubber (BIIR) stopper/Solid plug for medical bottle

A solid plug for medical bottle use can be molded in black BIIR with a profile adapted to the bottle opening. The inserted body and upper seating surface should be dimensioned with the container and its closure hardware. The black exterior identifies an appearance choice; the complete formulation and geometry define the actual component version.

During assembly, inspect the contact areas under suitable lighting. Fine particles or damage may be harder to see on a dark surface, particularly beneath the head. Keep the body protected before insertion and place it straight into the clean opening. Verify the final position after the bottle's retaining arrangement is completed.

Select the BIIR formulation for the intended contents and processing conditions. A solid plug should remain in the form required by the closure design rather than being modified during fitting. If bottle neck dimensions or processing steps change, assess their effect on the stopper configuration. Replacement should preserve the full profile and material assignment, since a similar black head does not show whether the less visible insertion section is equivalent.

Material options

Rubber compound options, customized alongside the profile and contact conditions.

Hardness selection

Solid rubber options: 30–90 Shore A. The inserted body and upper seating surface should be dimensioned with the container and its closure hardware.

Custom geometry

If bottle neck dimensions or processing steps change, assess their effect on the stopper configuration.

Fit evaluation

During assembly, inspect the contact areas under suitable lighting.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. A Solid plug for medical bottle use can be molded in black BIIR with a profile adapted to the bottle opening. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.