Paper bulking promoter
AssigneeKao Corporation
InventorsTakaaki Tadokoro, Yasushi Ikeda, Takayuki Ikenaga, Atsuhito Mori, Yoichi Ishibashi, Yasuo Ishii, Toshiyuki Nishimori, Hiromichi Takahashi
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Abstract
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° 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 C2-4 oxyalkylene groups per 1 mole of the said ester compound is used as a paper bulking promoter.
Claims15
A method for producing a highly bulky pulp sheet, said method comprising
- adding a paper bulking promoter to a pulp feedstock in a papermaking process in the amount of 0.1 to 10% by weight based on the pulp feedstock;
- wherein said paper bulking promoter comprises an ester compound having the melting point of not more than 100° 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 C2-4 oxyalkylene groups per 1 mole of the said ester compound;
- wherein 10 to 95% by equivalent of OH groups of the alcohol have been esterified.
The method of 1, further comprising the steps of
- forming paper layers by draining water from a diluted liquid of the pulp feedstock, and
- forming said highly bulky pulp sheet.
The method of 1, further comprising the step of forming a sheet, wherein said bulking promoter remains in the paper.
The method of 1, wherein said pulp feedstock is deinked pulp or virgin pulp.
Dependencies are inferred from the claim text.