RP material suggestion needed (strong plastic)

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Discussion Overview

The discussion revolves around finding a suitable strong transparent or translucent material for creating small prototype parts, specifically focusing on silicone RTV and other potential alternatives for soft tooling applications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant is seeking a strong transparent or translucent Silicone RTV for prototype parts, expressing uncertainty about the availability of stronger options.
  • Another participant questions the definition of "strong," suggesting that it could relate to various properties such as structural integrity, wear-resistance, and tolerance to different forces.
  • A suggestion is made to consider binary acrylic compounds like Casolite, which can be tinted and poured into molds, although its suitability for soft tooling is uncertain.
  • One participant admits a lack of understanding of "soft tooling" but recommends materials like Delrin, nylon 66 or 77, and Torlon if machining is involved.
  • Another participant questions the necessity of transparency/translucency and suggests POR Epoxy Putty as an alternative if that requirement is flexible.
  • One participant emphasizes the need for more detailed specifications regarding the desired properties of the material, noting the vast variety of plastics and their characteristics.

Areas of Agreement / Disagreement

Participants express varying levels of knowledge about materials, with no consensus on the best option for the original request. Multiple competing views and suggestions remain, indicating that the discussion is unresolved.

Contextual Notes

Participants highlight the importance of defining specific requirements for the material, including properties like temperature resistance and pliability, which remain unclear in the original inquiry.

leoflc
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I've been looking for some kind of strong transparent/translucent Silicone RTV to make some small strong plastic prototype parts.

So far I've only found stuff like smooth-on, but there should be something stronger out there.. I think..

Does anyone know a material that would fit my need?

Thanks a lot!
 
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I don't know anything about silicone materials other than just the regular sealant that comes in a tube. I also don't know what you mean by 'strong'. Is it purely a matter of structural integrity, or do you need wear-resistance, high compression or tension tolerance, torsion... you get the picture.
Have you considered the binary acrylic compounds such as Casolite, that are used for making paper-weights, key fobs, etc.? They're normally colourless, but can be tinted with additives, and just pour into a mould.
 
I'm trying to do soft tooling, but I'll look into Casolite.

Does anyone else know anything more about material for soft tooling?

Thanks.
 
I reluctantly admit that I don't know what the term 'soft tooling' means. If it involves machining the components, then I'd look into Delrin, nylon 66 or 77, Torlon, etc..
 
leoflc said:
I've been looking for some kind of strong transparent/translucent Silicone RTV to make some small strong plastic prototype parts.

Does it have to be transparent/translucent? If this isn't such an important requirement, might try some stuff called POR Epoxy Putty.
 
I must say that your need is not fully explained in your thread...but you talk about some type of soft toolable silicone. It would be very necessary for you to explain what your pourpose is since there are virtually millions of different types of plastics that incorporate the usage of many other materials. One such usage is resins and other usages include many different compounds. They all are mixed in different amounts to create many types of plastics which have unique characteristics which include temperature resistance, acidic resistance, scratch resistance, plyability, and lucidity. So what combination are you looking for and what spacifically are your needs.
 

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