| 摘要 |
<p>The present invention relates to a recyclable sheet material as defined below and a container, preferably a cup, based on cellulosic material for water containing foodstuff formed of such recyclable sheet material comprising
a) a paper board containing a water repellent and optionally fat repellent sizing agent,
b) an adhesive layer based on at least one polymer having a water solubility equal or less than 4 % per weight / 100 ml water at 25 °C and a surface energy of equal or greater 38 mJ/m 2 at 20 °C (test liquid:water) in an amount of providing a Cobb value of equal or less than 15 g/ M 2 per 60 sec is coated on at least one uncoated surface of the paper board and combined with the paper layer c),
c) a paper layer impregnated with a water barrier impregnation in an amount of providing a Cobb value of equal or less than 17 g/ M 2 per 60 sec,
d) a heat sealable and water barrier coating on said impregnated paper layer c) in an amount of providing a Cobb value of equal or less than 8 g/ M 2 per 600 sec of the coated board which coating is based on a polymer having a Tg of equal or less than 30 °C (measured according to DSC).</p> |
