Generally, thermoplastic discs come in two types: crystalline and amorphous. Crystalline plastics appear semi transparent, milky or opaque in appearance, only transparent in thin film condition, with hardness ranging from soft to keratinous. Thermosetting plastic discs generally contain fillers and are not transparent. If they do not contain fillers, they are transparent. Elasticity has a rubber like feel and a specific elongation rate.

Different types of plastic discs have different densities. The density measurement method can be used to identify the plastic discs, but the foamed products should be separated at this time, because the density of the foamed plastic discs is not the real density of the materials. In practical industry, there are also methods of sorting plastic tray materials using different densities of plastic trays.

The incineration test identification method is to use a small flame to burn a plastic disc sample, observe the combustibility of the plastic disc in and outside the fire, and pay attention to the dripping method and odor of the molten plastic disc after extinguishing to identify the type of plastic disc raw material. Due to its low raw material cost and self flame retardant properties, it is widely used in the construction industry, especially in sewer pipes, plastic steel doors and windows, panels, artificial leather, and other applications.

Article source: Plastic tray manufacturerhttp://www.jmhongshengyuan.com