1 Aluminijska folija ima srebrno bijeli sjaj, tanka i lagana izvedba

Aluminijska folija ima sjajan srebrno-bijeli prekrasan sjaj, netoksičan, bez ukusa, i bezopasna za ljudski organizam. Nakon bojanja, iskucavanje i tisak, može dobiti bilo kakve šarene uzorke i šare, a da ne izgubi svoj prekrasan sjaj. Trenutno, minimalna debljina smotane folije može doseći 4 pm, a aluminijska kutija je lagana, kao što je aluminijska folija debljine 6um, koja teži samo 16g po četvornom metru.

2 Izvedba otpornosti na vlagu aluminijske folije

U usporedbi s drugim materijalima za pakiranje, aluminijska folija ima nisku propusnost vlage, dobra otpornost na vlagu, i ima prednosti sigurnosti, praktičnost i dugi vijek trajanja, iako rupice i Kako se debljina aluminijske folije smanjuje, njegova otpornost na vlagu i dalje ima prednosti u odnosu na plastične folije bez rupica i drugih materijala za pakiranje, because the polymer chains of plastic have a large distance from each other and cannot prevent water vapor from penetrating. If the surface of the aluminum foil is coated with resin or compounded with paper or plastic film, its moisture-proof performance is better. See Table 2-1 for the moisture permeability of aluminum boxes and plastic films with different thicknesses.

Stol 2-1 Moisture permeability of aluminum foil and plastic film

The thickness of aluminum foil is so small that pinholes inevitably appear to a certain extent, and the minimum thickness of pinholes is generally considered to be 0.038mm. 025mm。 Due to the improvement of rolling technology and material, this thickness has been reduced to 0. 025mm. It has also been proved by experiments that the diameter of the vent hole is critical. When the diameter is less than 5um, no oxygen and water vapor can be transmitted in the measurable range.