Sealant for polypropylene and easily openable hermetically sealed package including the same

A sealant for polypropylene consisting essentially of a composition comprising:

• a high-pressure-processed low-density polyethylene (A) having a density (measured in accordance with ASTM D 1505) of 910 to 930 kg/m3 and a melt flow rate (measured under a load of 2.16 kg at 190° C. in accordance with ASTM D 1238) of 0.5 to 20 g/10 min, and
• an ethylene/α-olefin copolymer (B) having a density (measured in accordance with ASTM D 1505) of 860 to less than 890 kg/m3, a melt flow rate (measured under a load of 2.16 kg at 190° C. in accordance with ASTM D 1238), MFR2.16, of 0.5 to 40 g/10 min and a molecular weight distribution (Mw/Mn) determined by gel permeation chromatography (GPC) of 1.5 to 3, obtained from ethylene and an α-olefin having 3 to 10 carbon atoms, and/or
• a linear low-density polyethylene (C) having a density (measured in accordance with ASTM D 1505) of 890 to 940 kg/m3 and a melt flow rate (measured under a load of 2.16 kg at 190° C. in accordance with ASTM D 1238) of 0.2 to 30 g/10 min, obtained from ethylene and an α-olefin having 3 to 10 carbon atoms,
• wherein, in the composition, the high-pressure-processed low-density polyethylene (A) is contained in an amount of 10 to 85% by weight, the ethylene/α-olefin copolymer (B) is contained in an amount of 50% by weight or less, and the ethylene/α-olefin copolymer (B) and linear low-density polyethylene (C) are contained in a total amount of 15 to 90% by weight, based on the total weight of high-pressure-processed low-density polyethylene (A), ethylene/α-olefin copolymer (B) and linear low-density polyethylene (C),
• which composition exhibits a melt flow rate (measured under a load of 2.16 kg at 190° C. in accordance with ASTM D 1238) of 1 to 15 g/10 min and a melt tension (MT) measured at 190° C. of 5 to 100 mN.