How to spec Polystyrene Sheet
How to spec Polystyrene Sheet
(OP)
Hi, We're looking to use a polystyrene sheet, thin, similar to a credit card (I know most CC's are PVC)...
The material must have certain properties, and we've recently been made aware that its possible for a mfr to aerate or "foam" polystyrene sheets to reduce material costs. But in turn it will change the material properties.
To try to reduce this, I've been advised that we need to add a note to our drawing with the effect "No foam polystyrene"...
Is this the right way to call this out? I've found foam polystyrene being spec'd out per its density...do i want to specify the min density, as the aerating will only make it less dense?
Thanks
The material must have certain properties, and we've recently been made aware that its possible for a mfr to aerate or "foam" polystyrene sheets to reduce material costs. But in turn it will change the material properties.
To try to reduce this, I've been advised that we need to add a note to our drawing with the effect "No foam polystyrene"...
Is this the right way to call this out? I've found foam polystyrene being spec'd out per its density...do i want to specify the min density, as the aerating will only make it less dense?
Thanks





RE: How to spec Polystyrene Sheet
RE: How to spec Polystyrene Sheet
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: How to spec Polystyrene Sheet
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: How to spec Polystyrene Sheet
The application is similar to that of a credit card with tabs that break off at score lines, or punch out of a larger card (like a sim card)...but no circuits... legally i can't tell you any more then that
"The spec sheet you read provided mass density."
have you worked with spartech plastics before? are you guessing that instead of listing the wrong units under "specific gravity," instead they listed the wrong test/specification title, and the units are correct?
RE: How to spec Polystyrene Sheet
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: How to spec Polystyrene Sheet
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: How to spec Polystyrene Sheet
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: How to spec Polystyrene Sheet
DOW, Huntsman, Basf all have Data sheets on their sites which will give you some generic figures to work from.
Steve
RE: How to spec Polystyrene Sheet
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell