Abstract
Plastic packaging is an indispensable element in the packaging industry. The identification of plastic component can provide important information for industry and inspection and quarantine departments. However, the development of plastic processing technology brings more difficulties and challenges to the identification. Identification methods of non-instrument are put forward in the paper. Density, halogen testing, solubility and burning test are investigated to learn some physical properties and get detailed features. Among, different liquids combination used for density, solubility of plastic in different solution, flame colour and smell of smoke during burning test are given. These can help to promote research and development, ensure export safety, ect.
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