1. PE
(1) Flammability: easy
(2) Self-extinguishing: none
(3) Flame color: yellow at the tip and blue at the bottom
(4) Burning status: burning while melting and falling, black smoke
(5) Peculiar smell: the smell of paraffin wax burning
(6) Residual signs: black, waxy and slightly brittle;
2. PP
(1) Flammability: easy
(2) Self-extinguishing: none
(3) Flame color: yellow at the tip and blue at the bottom
(4) Burning status: burning while melting and falling, a small amount of black smoke
(5) Peculiar smell: oil smell
(6) Residual signs: black, waxy and slightly brittle;
3. PA/NY
(1) Flammability: slow burning
(2) Self-extinguishing: Yes
(3) Flame color: blue flame, yellow on the top
(4) Combustion status: melting and dripping
(5) Odor: burnt smell of wool and nails
(6) Residual signs: yellowish brown, stiff;
4. PET
(1) Flammability: easy
(2) Self-extinguishing: none
(3) Flame color: yellow flame, blue edge
(4) Burning status: shrinking, melting, black smoke
(5) Peculiar smell: loose fragrance
(6) Residual signs: residual black powder
5. Cellophane
(1) Flammability: easy
(2) Self-extinguishing: none
(3) Flame color: red and yellow
(4) Burning status: burning like paper
(5) Smell: smell like paper
(6) Residual signs: white gray powder
6. PVDC
(1) Flammability: difficult
(2) Self-extinguishing: Yes
(3) Flame color: yellow at the tip and green at the bottom
(4) Burning status: softened, white smoke
(5) Peculiar smell: pungent sour taste
(6) Residual signs: dark black;
7. PVA
(1) Flammability: easy
(2) Self-extinguishing: slow self-extinguishing
(3) Flame color: yellow
(4) Burning status: softened like candle flame, emitting black smoke
(5) Peculiar smell: unpleasant sweet smell
(6) Residual signs: light brown, brittle.