Homebrew PCBs

Delrin, a tradmarked version of acetal is a really decent plastic.

It can take much higher temperatures than ABS
is easy to machime
is fairly chemical resistant
is easy to get a hold of in rod tube bar and sheet

the biggest problem is that it is a little difficult to bond with adhesives

Rob

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In a message dated 10/19/2003 2:22:36 PM Central Standard Time, 
ron_amundson@... writes:
the biggest problem is that it is a little difficult to bond with adhesives
AND it turns to blackboard-chalk when exposed to UV (sunlight) for months!


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Raw acetal will do that, but the black delrn stuff I use has a uv stabilizer. Even with accelerated UV exposure testing it holds up well. I have some grey non UV stabilized stuff that I never used as I was too paranoid.... Thanks for the heads up
Ron

  ----- Original Message ----- 
  From: JanRwl@... 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Sunday, October 19, 2003 4:56 PM
  Subject: Re: [Homebrew_PCBs] Delrin


  In a message dated 10/19/2003 2:22:36 PM Central Standard Time, 
  ron_amundson@... writes:
  the biggest problem is that it is a little difficult to bond with adhesives
  AND it turns to blackboard-chalk when exposed to UV (sunlight) for months!


  [Non-text portions of this message have been removed]


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[Non-text portions of this message have been removed]

In a message dated 10/19/2003 10:35:40 PM Central Standard Time, 
ron_amundson@... writes:
Raw acetal will do that, but the black delrn stuff I use has a uv stabilizer
Right, I WAS thinking only about the white.  The black Delrin in the same 
outdoor pushbutton-assy. seems OK.  Just the white that has turned to chalk.


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