What Are the Best Alternatives for Designing and Inflating Thinnest Latex Tubes?

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Discussion Overview

The discussion revolves around the design and inflation of thin latex tubes, specifically focusing on dimensions, materials, and potential applications. Participants explore various specifications and alternatives for creating an inflatable seal that allows for pressure adjustments.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the dimensions of a latex tube, suggesting a size of 1/8" ID x 1/64" wall.
  • Another participant asks for the required length of the tube, indicating that the intended purpose is important for design considerations.
  • A participant mentions that a length of about 5 inches should suffice for their specific application.
  • One suggestion is to consider using balloons, although another participant dismisses this due to their thinness.
  • A participant proposes using a thicker latex tube with a larger inner diameter (ID) to ensure proper inflation for an inflatable seal.
  • Another participant suggests that a medical inflatable catheter might be a suitable alternative due to its thickness.
  • There is a mention of industry standards for medical specifications, with a reference to a specific military specification document from 1973.
  • One participant discusses the possibility of creating a custom latex tube using a mold, mentioning materials and techniques for achieving the desired thickness.
  • Concerns are raised about the even inflation of the tube, with a suggestion that an outer sleeve may be necessary to prevent over-inflation and ensure uniform expansion.
  • A participant proposes the use of silicone rubber tubes as an alternative, questioning why they might not be suitable for the application.
  • There is also a suggestion to consider a flat tube that can become round when inflated.

Areas of Agreement / Disagreement

Participants express various viewpoints and suggestions regarding the design and materials for the latex tube, with no clear consensus reached on the best approach or solution. Multiple competing ideas and uncertainties remain present throughout the discussion.

Contextual Notes

Participants reference specific dimensions, materials, and techniques, but there are limitations in the assumptions made about the application and the properties of the materials discussed. The discussion does not resolve the technical challenges associated with inflation and design.

gbriggs
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TL;DR
Hello,
Im working on a project and I would like to inflate a latex tube to expand twice the original outer diameter or even more. The thinnest latex I have found is 1/8" inner diameter with 1/32" wall thickness. Does a 1/64" wall thickness exist or what other material can I go with?
I will be using a small pressure bulb with non return valve inside that is 1/8" OD which will inflate the tube.
1/8" ID X 1/64" wall latex tube?
 
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How long does the tube need to be?
 
Well if the product works for the intended purpose I would be ordering rolls of it. But for the specific purpose about 5 inches should suffice
 
No too thin. I think i have to go with 1/32 W and just go with larger ID which will make it inflate. Its to act as an inflatable seal which allows for pressure adjustments. Thanks anyway!
 
Perhaps the specifications for ID and wall thickness that you found are an industry standard for medical work.
Such as this specification (1973 but would that change over the years ).
http://everyspec.com/MIL-SPECS/MIL-SPECS-MIL-T/MIL-T-36966A_9346/
Poke on the orange Download File button for a PDF.

You could ask a manufacturer for a special order, or,

Try to make your own specific tube with your own latex.
http://www.rutherford-robotics.com/balloon/
For a mold you need something like plaster of paris ( kind of thin for plaster of paris perhaps ) that will absorb the water and congeal latex onto the mold.
Longer dipping time means thicker.
And some talc dusting to the latex doesn't stick to itself after removing from the mold.
Now to find the right type of latex.
Just a thought.
 
I expect there will be a problem with even inflation of the tube over the full length. Part of the tube will expand first and form a sphere, with two tails. That is because the pressure reduces as the tube radius increases, while the tube shortens.
It would be necessary to inflate the tube inside an outer sleeve that will prevent over-inflation. To make a single tube you would need to give it a two layer wall structure that will constrain expansion at twice the diameter.

Silicon rubber tube is available in the size you require. Is there a reason why it cannot be used?

Maybe you could use a flat tube that becomes round when inflated.
 
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