| 摘要 |
The invention relates to film materials, which produce a change of color at crippling, in particular to the packing materials with indication of the integrity of packing. The basic purpose of such materials consists in averting the placing of forbidden or dangerous objects into the luggage of passengers after luggage control by security service of airport. A material contains the first polymer film, to one of planes of which closely fits the second polymer film, in this case polymer films are welded or glued with each other by means of a large quantity of long seams intersecting between them, which divide the space between polymer films into a large quantity of sealed capsules filled with the first reagent, in this case on the second side of the first layer of polymer film is applied the layer of porous material impregnated with the second reagent, whose interaction with the first reagent leads to the formation of reaction product, whose presence can be easily identified. The invention provides manufacturing packing material according to simpler procedure, which excludes the possibility of imperceptible damage of packing. |
