Resin composition for foamable laminate, foamable laminate, method for producing the same, and foamed converted paper and heat insulating container using the same

2:

• A polyethylene resin composition, comprising
• a polyethylene-based resin (A), wherein the polyethylene resin composition satisfies the following properties (a-1) to (a-3):
• (a-1) the melt flow rate (MFR) of the polyethylene-based resin (A) as measured in accordance with JIS K7210 (190° C., a load of 21.18N) is 9 g/10 minutes or more and less than 20 g/10 minutes,
• (a-2) the density of the polyethylene-based resin (A) in accordance with JIS K7112 at a test temperature of 23° C. is from 0.900 to 0.930 g/cm3, and
• (a-3) the oxygen induction time (OIT) at 180° C. is 10 minutes or more and less than 80 minutes.

7:

• A method for producing a foamable laminate, the method comprising:
• forming a polyethylene-based resin layer (I) for foaming on at least one side of a substrate mainly comprising paper, by performing extrusion lamination with a polyethylene resin composition comprising a polyethylene-based resin (A) on the at least one side of the substrate,
• wherein the polyethylene resin composition satisfies the following properties (a-1) to (a-4):
• (a-1) the melt flow rate (MFR) of the polyethylene-based resin (A) as measured in accordance with JIS K7210 (190° C., a load of 21.18N) is 7 g/10 minutes or more and less than 20 g/10 minutes,
• (a-2) the density of the polyethylene-based resin (A) in accordance with JIS K7112 at a test temperature of 23° C. is from 0.900 to 0.930 g/cm3,
• (a-3) the oxygen induction time (OIT) at 180° C. is 10 minutes or more and less than 190 minutes, and
• (a-4) the memory effect (ME) of the polyethylene-based resin (A) as measured using a melt indexer to be used in JIS K7210 and under conditions of a cylinder temperature of 240° C. and a constant-rate extrusion output of 3 g/minute is less than 2.0.

9:

• A foamable laminate comprising:
• a polyethylene-based resin layer (I) comprising the polyethylene resin composition according to claim 1 on one side of a substrate mainly comprising paper;
• and
• a thermoplastic resin layer (II) comprising a thermoplastic resin (B) on the other side of the substrate,
• wherein the polyethylene-based resin layer (1) is a layer to be foamed by a vapor released from the substrate by heating,
• the thermoplastic resin layer (II) is a layer that retains a vapor released from the substrate, and
• the thermoplastic resin layer (II) comprises a thermoplastic resin (B) having the following characteristic (b-1):
• (b-1) the melting point (Tm(b)) is from 100 to 140° C.

17:

• A foamable laminate comprising:
• a polyethylene-based resin layer (I) comprising the polyethylene resin composition according to claim 2 on one side of a substrate mainly comprising paper;
• and
• a thermoplastic resin layer (II) comprising a thermoplastic resin (B) on the other side of the substrate,
• wherein the polyethylene-based resin layer (I) is a layer to be foamed by a vapor released from the substrate by heating,
• the thermoplastic resin layer (II) is a layer that retains a vapor released from the substrate, and
• the thermoplastic resin layer (II) comprises a thermoplastic resin (B) having the following characteristic (b-1):
• (b-1) the melting point (Tm(b)) is from 100 to 140° C.