How To Identify PVC Sheet

　　PVC sheet has a very wide range of uses and can be used to make: PVC card; PVC OEM; PVC wire; PVC curtain; PVC plastic-coated welded wire mesh; PVC foam board, PVC ceiling, PVC water pipe, PVC skirting Lines, and conduits, cable insulation, plastic doors and windows, plastic bags, etc. So, do we have a way to identify the pros and cons of PVC sheets?

　　1. Identification of combustion method:

　　Softening or melting temperature range: 75~90°C;

　　Combustion: self-extinguishing after ignition;

　　Burning flame state: yellow on the top and green on the bottom with smoke;

　　Condition after leaving the fire: the fire is extinguished;

　　Odor: pungent sour odor.

　　2. Solvent treatment identification:

　　Solvent: tetrahydrofuran, cyclohexanone, ketone, dimethylformamide;

　　Solvent free: methanol, acetone, heptane.

　　Add the PVC sheet to the above solvent and observe the dissolution of the plastic to determine whether it is PVC. After the solvent is heated, the dissolution effect will be more obvious.

　　3. Specific gravity method:

　　The specific gravity of the PVC sheet color sheet is 1.35~1.45, generally around 1.38.

　　PVC and other plastics can be differentiated by specific gravity differences or specific gravity measurements.

　　However, since PVC can be made into very different proportions by adding plasticizers, modifiers, and fillers, the soft and hard differences are very large, and due to the addition of some components, many properties of the color table of PVC sheets are changed, resulting in The effect of our commonly used identification methods is not obvious, and we cannot make accurate judgments.