Creping adhesive, powder for use as creping adhesive, method for producing creping adhesive, and toilet paper, tissue paper, paper towel, kitchen paper, or napkin base paper

A powder for use as a creping adhesive comprising a vinyl alcohol polymer (A), wherein at least one of (i) and (ii) below is satisfied:

• (i) the vinyl alcohol polymer (A) comprises a vinyl alcohol polymer having a minimum degree of branching of 0.25 or more and 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less, and a ratio Mw/Mn of a weight-average molecular weight Mw to a number-average molecular weight Mn of the vinyl alcohol polymer (A) is 2.5 or more;
• and
• (ii) the ratio Mw/Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn of the vinyl alcohol polymer (A) is 3.8 or more, and
• wherein a percentage content of the powder capable of passing through a sieve having a mesh opening size of 180 μm is 12% by mass or less.

A method for producing a creping adhesive, the method comprising dissolving a vinyl alcohol polymer (A) in water, wherein at least one of (i) and (ii) below is satisfied:

• (i) the vinyl alcohol polymer (A) comprises a vinyl alcohol polymer having a minimum degree of branching of 0.25 or more and 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less, and a ratio Mw/Mn of a weight-average molecular weight Mw to a number-average molecular weight Mn of the vinyl alcohol polymer (A) is 2.5 or more;
• and
• (ii) the ratio Mw/Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn of the vinyl alcohol polymer (A) is 3.8 or more,
• wherein the vinyl alcohol polymer (A) comprises a vinyl alcohol polymer (A1) having a structural unit derived from at least one selected from the group consisting of:
• a monomer comprising a carboxy group;
• and a derivative of the monomer, and
• wherein and the vinyl alcohol polymer (A1) satisfies the following inequation (II):
• 1.
• <
• g
• A
• /
• g
• B
• <
• 3.
• (
• II
• )
• in which:
• gA represents a degree of branching of the vinyl alcohol polymer (A1) having an absolute molecular weight of 200,000;
• and
• gB represents a degree of branching of the vinyl alcohol polymer (A1) having an absolute molecular weight of 800,000.

A paper product, wherein the paper product is a toilet paper, a tissue paper, a paper towel, a kitchen paper, or a napkin base paper, and the paper product comprises a vinyl alcohol polymer (A), wherein at least one of (i) and (ii) below is satisfied:

• (i) the vinyl alcohol polymer (A) comprises a vinyl alcohol polymer having a minimum degree of branching of 0.25 or more and 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less, and a ratio Mw/Mn of a weight-average molecular weight Mw to a number-average molecular weight Mn of the vinyl alcohol polymer (A) is 2.5 or more;
• and
• (ii) the ratio Mw/Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn of the vinyl alcohol polymer (A) is 3.8 or more,
• wherein the vinyl alcohol polymer (A) comprises a vinyl alcohol polymer (A1) having a structural unit derived from at least one selected from the group consisting of:
• a monomer comprising a carboxy group;
• and a derivative of the monomer, and
• wherein and the vinyl alcohol polymer (A1) satisfies the following inequation (II):
• 1.
• <
• g
• A
• /
• g
• B
• <
• 3.
• (
• II
• )
• in which:
• gA represents a degree of branching of the vinyl alcohol polymer (A1) having an absolute molecular weight of 200,000;
• and
• gB represents a degree of branching of the vinyl alcohol polymer (A1) having an absolute molecular weight of 800,000.