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February 2002

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Subject:
From:
Bill Christoffel <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 14 Feb 2002 13:03:50 -0600
Content-Type:
text/plain
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text/plain (143 lines)
In a former life, I had some great results with a 3M material (#2214
structural adhesive)  worked great as passed very rigid (MIL) shock and
vibration testing.

BC

-----Original Message-----
From: Rick Thompson [mailto:[log in to unmask]]
Sent: Thursday, February 14, 2002 12:43 PM
To: [log in to unmask]
Subject: Re: [TN] Adhesive Recommendations?


The 'tearing away' is exactly the problem our customer is concerned with
based on their experience. This thing has to go in a bumper car which
has significant impact shock for may hours a day.  Unfortunately for us,
the design is a modification of an existing product that doesn't see
this environment.  The wire hold downs are a good idea, but we can't use
them is some areas of the board due to the design.

Rick Thompson


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Guy Ramsey
Sent: Wednesday, February 13, 2002 8:02 AM
To: [log in to unmask]
Subject: Re: [TN] Adhesive Recommendations?


I wondered if anyone was going to caution the group on this fact. I have
seen RTV damage the printed circuit right through solder mask.

The other thing I have observed is that it isn't that good at absorbing
shock. If you hit it hard it can simply tear or worse bounce and
actually return energy to the component.

I think in the context originally described in this thread, used in
conjunction with a wire hold down, it may be okay.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of bbarr
> Sent: Wednesday, February 13, 2002 8:54 AM
> To: [log in to unmask]
> Subject: Re: [TN] Adhesive Recommendations?
>
>
> Use caution if you buy a general purpose RTV at a hardware store. Many

> of those products will be corrosive to electronics. If it smells like
> vinegar when it cures it is no good for electronics. You must use an
> electronic grade of RTV on boards. We use Dow Corning 3145 all the
> time for staking with excellent results. We too transfer it to a
> syringe and use an EFD dispenser.
>
> Bob
>
> =======================
> Robert Barr
> Manufacturing Engineering
> Formation, Inc.
> Voice: 856-234-5020 x3035
> Fax: 856-234-6679
>
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]]On Behalf Of Phil Nutting
> > Sent: Wednesday, February 13, 2002 8:15 AM
> > To: [log in to unmask]
> > Subject: Re: [TN] Adhesive Recommendations?
>
> >
> > For instant gratification there are several clear RTV products
> > available at the local hardware store that are used for general
> > bonding and sealing. Like replacing those tiles in the bathroom that

> > have come loose.
> >
> > It isn't high tech but it has worked for many years.
>
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