How to identify the quality of winding film

Changzhou Kaima Plastics:

The winding film is more and more applied to foreign trade export, food and beverage, printing and papermaking, fire-resistant materials, wooden floors, non-woven fabrics, cosmetics, handicrafts, communication products, carpets, ceramic electromechanical products, computers, books and periodicals, household electrical products, electronic components, OEM raw and auxiliary materials, ceramic tiles and other building materials, steel, profiles, wires, aluminum alloy profiles and other products. Especially in packaging enterprises, this is an essential product. The winding film is non-toxic, odorless, safe, easy to use and efficient. It also has good retraction rate, puncture resistance, tear resistance and other excellent characteristics. Its function is a packaging film, which can wrap objects, so that items will not be scattered, and will not be invaded by wind and rain. How can we distinguish its quality?

1. Judging from the viscosity of the winding film: the viscosity of the winding film can be well distinguished by trying to lower the viscosity by hand.

2. Judging by the winding film stretching ratio: we can stretch outward from the length of the winding film, and then stretch horizontally from the winding film, which can also distinguish the good from the bad; Similarly, if the winding film is too thin, the ductility can be seen without testing.

3. Check the glossiness of the winding film to judge: the ordinary winding film is relatively dark, and the good winding film is relatively transparent.

4. Look with your eyes

The non-toxic plastic bag is white, transparent or slightly transparent, with average texture; Toxic plastic bags are colored or white, but the transparency is poor, and they are turbid. The plastic surface is stretched unevenly with small particles.

5. Listen with your ears

When you listen to the plastic bag and shake it with your hands, it will make a loud sound to indicate that it is a non-toxic plastic bag; And the sound is small and stuffy is toxic plastic bags.

6. Touch with hands

Touch the surface of the plastic packaging bag with your hands. It is very lubricating and non-toxic; Sticky, astringent and waxy are toxic.

7. Sniff

The non-toxic plastic packaging bag is odorless; Those with irritating smell or abnormal taste are toxic.

8. Submerged water test method

In the submerged experiment, put the plastic bag into the water, press it to the bottom of the water with your hand, wait a moment, and the one that emerges from the water is the non-toxic plastic packaging bag, and the one that sinks to the bottom is the toxic plastic packaging bag.

9. Extinction method

The non-toxic plastic bag in the extinguishment test is flammable, the flame tip is yellow, and part of it is cyan. When it is extinguished, it drips like candle tears, and has the smell of paraffin; The toxic plastic bag is not easy to extinguish, and it will extinguish immediately after leaving the fire. The flame tip is yellow, and the bottom is green. It can be softened and drawn.