Resin composition, water-resistant/moisture-proof paper, containing the same, and process for producing the same

A method for producing water-resistant and moisture-proof paper, comprising the steps of:

• applying a resin composition, comprising 40 to 75 parts by weight of a polyolefin (A), 25 to 60 parts by weight of a tackifier (B) and 0 to 20 parts by weight of a compatibilizing agent (C), the total of (A), (B) and (C) being 100 parts by weight, to at least one side of a paper substrate, to form a water-resistant and moisture-proof layer, and
• forming a coat layer of a (meth)acrylic resin on the surface of the water-resistant and moisture-proof layer.

A resin composition for water-resistant and moisture-proof paper, comprising 40 to 75 pails by weight of a polyolefin (A), 25 to 60 parts by weight of a tackifier (1) and 0 to 20 parts by weight of at least one compatibilizing agent (C), the total of (A), (B) and (C) being 100 parts by weight wherein said resin composition is colored with the same color as a paper substrate.

A water-resistant and moisture-proof paper, comprising:

• a resin composition comprising 40 to 75 parts by weight of a polyolefin (A), 25 to 60 parts by weight of a tackifier (B), 0 to 20 parts by weight of a compatibilizing agent (C), the total of (A), (B), and (C), being 100 parts by weight, and 20 to 300 pans by weight of an inorganic filler (D) to the total amount of 100 parts by weight of (A), (B), and (C), said resin composition is provided between at least two sheets of a paper substrate.

A water-resistant and moisture-proof paper, comprising:

• a resin composition comprising 40 to 75 parts by weight of a polyolefin (A), 25 to 60 parts by weight of a tackifier (B), 0 to 20 parts by weight of a compatibilizing agent (C), the total of (A), (B), and (C), being 100 parts by weight, and 20 to 300 parts by weight of an inorganic filler (1) to the total amount of 100 parts by weight of (A), (B), and (C), said resin composition provided directly on at least one side of a paper substrate.

A water-resistant and moisture-proof paper, comprising:

• a paper substrate having a water-resistant and moisture-proof resin composition layer formed directly on at least one side of said paper substrate, said resin composition, comprising:
• 40 to 75 parts by weight of a polyolefin (A), 25 to 60 parts by weight of a tackifier (B) and 0 to 20 parts by weight of a compatibilizing agent (C), the total of (A), (B) and (C) being 100 parts by weight, and a coat layer of a (meth)acrylic resin formed on the water-resistant and moisture-proof layer.