Polyolefin type polymers

If the sample floats it generally indicates a polyolefin type of polymer but two more tests are needed to check what type of polyolefin it is.

Scratch testing

Scratch the sample with your fingernail.

Flame testing

Hold the sample in a lighted match and smell.

Note: Take care when smelling any plastic material. Make sure the flame is totally out. Do not directly inhale the fumes from the burning sample. Hold the sample away from your nose (about 20 - 30 cm) and sniff just enough to get the smell. Do not inhale deeply. Take care of any dripping polymer - it will be very hot and can burn.

Results

Glossy surface, does not scratch, burns with the smell of paraffin wax - Polypropylene

Glossy surface, slight scratching, burns and drips like wax - Polyethylene (High Density)

Not very glossy surface, scratches easily, burns with the smell of paraffin wax - Polyethylene (Low Density)

 

Last edited: 29/03/2004

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