How to distinguish food cling wrap of different materials

The food cling wrap on the market can be divided into three categories: polyethylene, polyvinyl chloride and polyvinylidene chloride. Different cling wraps have different application ranges and characteristics. For example, some cling wraps cannot store cooked food or heat them. So how to distinguish different materials of plastic wrap.

How to distinguish food cling wrap of different materials:
1. The material is usually indicated on the packaging of the plastic wrap. If there is no indication or you are worried about quality problems, you can check it by fire test.
2. When the PVC plastic wrap is burned, the flame will turn black, emit black smoke, and produce a pungent smell, and it will automatically turn off as soon as it leaves the fire source.
3. When PE cling film burns, there will be a yellow flame, and it is odorless, and it can continue to burn even if it is removed from the fire source.
4. In addition, sensory identification can also be used. If the whole roll of food cling wrap turns yellow, it is made of PVC, and the white one is PE.
5. The viscosity and transparency of PE plastic wrap are poor, it is easy to open after rubbing with hands, and it is easy to break when stretched.
6. PVC food cling wrap has better transparency and viscosity. It is not easy to unfold after kneading, and it is not easy to break after large stretching. It is relatively sticky.

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