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ID this plastic
- Thread starter rwm
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- Feb 1, 2015
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Interesting that you should mention a float test. When I worked for Ray O Vac in the seventies, I was charged with the task of determining the density of a thin plastic sheet that we used in manufacturing the battery for the Polaroid SX70 camera. Measuring area and thickness to determine volume and then weighing the specimen wasn't working because of variations on the thickness of the sheet.
What I came up with was to cut a sample into tiny sheets and place them in solutions of varying density. If the samples floated, they were less dense than the solution and if they sank, they were more dense. I made the differing solutions be adding salt to water and the denisty of the solution could be precisely measured with a hydrometer. It was possible to determine the density of the sheet to three decimal places.
What I came up with was to cut a sample into tiny sheets and place them in solutions of varying density. If the samples floated, they were less dense than the solution and if they sank, they were more dense. I made the differing solutions be adding salt to water and the denisty of the solution could be precisely measured with a hydrometer. It was possible to determine the density of the sheet to three decimal places.
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Wrong thread
Moved to here:
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Identifying plastics?
My first thought was UHMW but you say not slippery. Then I thought Acetal, but maybe not, though that doesn't really feel slippery to me. Delrin? Then I saw the glass filled. If it is ballistic I am back to UHMW, but it doesn't float.... Scrap-binium! Can you take a chip from it with a razor...
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