Fellow TechNetters:
Where can I find die bonding requirement. I am not familiar if IPC address these issues/concerns. The same goes for die cutting anomalies.
"X"
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: Thursday, April 28, 2011 7:42 AM
To: [log in to unmask]
Subject: Re: [TN] Mixed bed resin in deionizing tanks
Morning? Have done a day's work already! DI works best at cold. The
normal resins are recommended at <50°C but are ok up to ~75°C, but less
efficient. Hot-water resins just have a different plastic matrix which I
surmise cannot be as good as 'normal' resins, otherwise there would be
no raison d'être for the latter. Many have a heat exchanger, so that the
hot water from the tank reheats the cooler water having passed through
the resin columns, thus saving energy.
Brian
On 28/04/2011 15:28, Steve Gregory wrote:
> Morning all,
>
>
>
> I have a question about the resin beads inside a mixed bed deionizing tank.
> I know they're called cation and anion resin beads, but I don't know much
> about the physical properties of them.
>
>
>
> We have a carbon bed tank and a hot mixed bed tank to deionize the water for
> our inline cleaner. I run the wash tank at 130 F., but I know the water will
> cool a little before it gets to the mixed bed. We were asked when we first
> had the DI system installed what temperature we would be running our wash
> at, and we told them 130 F., they said that we would need a hot mixed bed.
>
>
>
> Okay, so we need a hot mixed bed, but what is the real difference in the
> resin beads between a standard mixed bed and a "hot" mixed bed?
>
>
>
> What happens when you run 130 F. water through a mixed bed that doesn't have
> "hot" resin beads? Do they swell up, or break down? Or is it that just the
> quality of the DI water will be affected?
>
>
>
> Steve
>
>
>
>
>
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