Topic

2.9 oz thermal mug and cup

This topic has 34 replies, 9 voices, and was last updated 4 years, 4 months ago by David Gardner.

Viewing 10 posts - 26 through 35 (of 35 total)

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Oct 9, 2020 at 2:08 pm #3678978

Bob E
BPL Member

@bobellenberg

I don’t think the air space helps–it hurts. As a building contractor I can tell you the goal of any insulation is to isolate small areas of air to prevent differences in temperature from creating moving air and therefore transferring heat. If an airspace worked we would simply seal up the spaces between studs and not need to install insulation. Foam does this better than fiberglass. You want solid material that has a low heat transmission with lots of voids.

Oct 9, 2020 at 2:10 pm #3678979

Jon Fong / Flat Cat Gear
BPL Member

@jonfong
Locale: FLAT CAT GEAR

how about the mesh sleeves that are used around wine bottles (shipping)? I purchased some rum at the airport (Duty Free) and they had these nice , thick foam sleeves.

Oct 9, 2020 at 3:18 pm #3678990

JCH
BPL Member

@pastyj-2-2

The sleeves that Jon posted are almost exactly what I was envisioning.

Bob E’s comments however now have me questioning whether it will work. I guess we just have to try it and find out :)

Oct 9, 2020 at 3:34 pm #3678994

DAN-Y
BPL Member

@zelph2

Reflectix® Duct Insulation Big Bubble Duct Insulation R‑6.0 would be the best choice material…………R-6.0

Oct 9, 2020 at 4:15 pm #3679006

David Gardner
BPL Member

@gearmaker
Locale: Northern California

@zelph2: That got me very interested and I checked out their website. They also make big bubble outdoor duct insulation R-8.0. But they’re both nominal 1″ thick.

Their non-big bubble duct insulation R-6.0 is 5/16″ though, which is perfect.

Oct 9, 2020 at 6:36 pm #3679024

DAN-Y
BPL Member

@zelph2

David, go back and read what they say about the R8 big bubble.

The product provides an R-8.0 when installed with a 0.75” air gap between the duct and the insulation, and R-6.0 when installed direct to the duct without a spacer.

Oct 9, 2020 at 6:38 pm #3679026

David Gardner
BPL Member

@gearmaker
Locale: Northern California

Got it. Same stuff, different installation, not useful as mug insulation.

Oct 9, 2020 at 7:22 pm #3679032

Josh J
BPL Member

@uahiker

@bobellenberg

Very nice, are you worried about leaching from the plastic?

Oct 9, 2020 at 7:34 pm #3679036

Josh J
BPL Member

@uahiker

@bobellenberg

Very nice, are you worried about leaching from the plastic?

Also curious why 4 pieces instead of 1 like you do for refletix?

Oct 20, 2020 at 10:39 am #3680400

David Gardner
BPL Member

@gearmaker
Locale: Northern California

Tested a double layer of Reflectix:

30 min: 81 C/178 F

60 min: 72 C/162 F

90 min: 65 C/149 F

Only slightly better than a single layer:

30 min: 80/176

60 min: 70/158

90 min: 61/142

I’m surprised. Again. Double thickness produced only 1-7% improvement.
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