Sheetlike composite for producing dimensionally stable food and drink product containers having a polymer layer having a ratio of aromatic groups to carbonyl groups

A sheetlike composite comprising, as layers of a layer sequence in the direction from an outer face of the sheetlike composite to an inner face of the sheetlike composite,

• a) first colour application, which is a chromatic ink application,
• b) a first polymer layer, which is a white primer layer,
• c) a further polymer layer, which is a polyolefin layer,
• d) a carrier layer, and
• e) a barrier layer,
• wherein the first polymer layer is characterized by a ratio of a proportion of aromatic groups in the first polymer layer to a proportion of carbonyl groups in the first polymer layer in a range from 0.18 to 0.34,
• wherein the ratio of the proportion of aromatic groups in the first polymer layer to the proportion of carbonyl groups in the first polymer layer is determined by
• measuring an ATR spectrum that covers a wave number range from 3500 to 1400 cm−1 with a resolution of 4 cm−1 is recorded at 45° by means of a diamond as detector tip, and
• calculating the ratio of the area of a maximum of the ATR spectrum in the wave number range from 1590 to 1610 cm−1 to the area of a maximum of the ATR spectrum in the wave number range from 1720 to 1740 cm−1,
• wherein the first polymer layer is further characterized by a ratio of a proportion of aliphatic groups in the first polymer layer to the proportion of carbonyl groups in the first polymer layer in a range from 0.40 to 0.60,
• wherein the ratio of the proportion of aliphatic groups in the first polymer layer to the proportion of carbonyl groups in the first polymer layer is determined by
• measuring an ATR spectrum that covers a wave number range from 3500 to 1400 cm−1 with a resolution of 4 cm−1 is recorded at 45° by means of a diamond as detector tip, and
• calculating the ratio of the area of a maximum of the ATR spectrum in the wave number range from 2900 to 2950 cm−1 to the area of a maximum of the ATR spectrum in the wave number range from 1720 to 1740 cm−1.