Face film bags for mask how important, this is self-evident.
Compared with the fancy decoration on the surface of the role, bags storage, protection function is more important.
But, in fact, a lot of people point, ignores this, to a large extent, this is they don't know the bag itself.
First of all, we know the knowledge about the aluminum foil bag.
Aluminum foil bag into aluminium bag and two kinds of pure aluminium bag.
Aluminium bag is under the high temperature vacuum, high purity aluminum evenly on the plastic film.
Pure aluminium bag tablet is pure metal aluminum, and plastic compound, can improve the barrier property of plastic, sealing, incense, shielding, and other functions.
Aluminum foil bag and aluminized bag can through the following several ways to distinguish discrimination: 1, watch: brightness than aluminum plating bright because of the aluminum foil, aluminum foil so reflective sex less than aluminum plating film, aluminium bag can reflect figure, except extinction film aluminum plating.
Extinction film plating aluminum and aluminum foil very approximate appearance.
Can the bag mouth, through the light bag, aluminum foil bag inside not pervious to light, pervious to light is aluminized bag.
2, feel is: aluminum foil bags of grip and crisp thick hard, heavy, feel of aluminized bag than aluminum foil bag is light and soft.
3, folding: aluminum foil bag easy to fold one dead plait mark, aluminized bag not folding into a dead plait, and will rebound soon.
4, twist twist: aluminum foil bags of coalescence is not easy to rebound after twist twist, aluminum layer will appear rupture.
Aluminium bag soon after twist twist NiuJieChu will play out, aluminum layer there would be no obvious cracks.
5, fire: fire won't burn, aluminum foil with aluminum layer will rollback, the aluminum foil packing will leave after burning gray aluminum slag.
Aluminum plating film can appear different plastic film when fire burning, no residual aluminum slag.