| 摘要 |
PROBLEM TO BE SOLVED: To obtain an additive for recycling waste paper, improving the bulkiness and oil-absorption of a recycled paper sheet obtained by using the waste paper, and reducing the foul of an apparatus in a papermaking step, and the foul of the recycled paper sheets, and further to provide a method for producing the recycled paper sheets. SOLUTION: The additive for recycling the waste paper contains (a) an amide compound obtained by reacting a compound represented by formula (I) (R<1> is a 1-4C alkylene group; R<2> and R<3> are each H or a 1-3C alkyl group; and (n) is an integer of 1-3) with a 10-24C aliphatic monocarboxylic acid in an amount of 1.5-3.3 times molar quantity of the compound, or a salt thereof, and (b) a specific nonionic surfactant, a cationic polymer, or the like, in the weight ratio of (99:1)-(60:40). The method for producing the recycled paper sheets is carried out by adding the additive in an amount regulated so that the total amount of the components (a) and (b) is 0.03-8 wt.% based on the amount of the waste paper pulp.
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