Kao Corporation

Toshiyuki Nishimori

Hiromichi Takahashi

Yasushi Ikeda

Takaaki Tadokoro

Yoichi Ishibashi

Yasuo Ishii

Takayuki Ikenaga

Atsuhito Mori

The present invention provides a paper quality improver for papermaking, for improving bulk value, brightness, and opacity of the pulp sheet. Further, the present invention provides a dry efficiency improver. A compound is used as the paper quality improver for papermaking, wherein the compound has less than 4% of lyotropic degree measured by a specific method and the compound satisfies at least two selected from (i) standard improved bulky value of not less than 0.02 g/cm, (ii) standard improved brightness of not less than 0.5 point and (iii) standard improved opacity of not less than 0.5 point. The compound is added internally into pulp slurry before or in papermaking step.

Paper quality improver for papermaking and method for producing pulp sheet

According to the present invention, a bulky sheet can be obtained without reducing the effect of a sizing agent. Thus, an ester compound having the melting point of not more than 100&deg; C. selected from (A) an ester compound of a polyhydric alcohol and a fatty acid and (B) an ester compound of a polyhydric alcohol and a fatty acid further including from more than 0 mole to less than 12 moles on the average of C oxyalkylene groups per 1 mole of the said ester compound is used as a paper bulking promoter.

Paper bulking promoter

Growing community of inventors

Wakayama, Japan

Toshiyuki Nishimori