| 摘要 |
<p>A bulky paper which contains a polyacrylamide having a charge amount as measured at pH 2 of 2.0 meq/g or smaller and a charge amount as measured at pH 12 of 2.0 meq/g or smaller. It may optionally further contain amorphous silica or an amorphous silicate each having a bulk specific gravity of 0.3 g/mL or smaller as a filler and contain a bulking agent comprising a fatty acid polyamide compound or an ester of a polyhydric alcohol with a fatty acid. It may further contain a mercerized pulp or crosslinked pulp. The bulky paper containing the polyacrylamide has a relative bond area up to 1.2 times the relative bond area of a bulky paper containing no polyacrylamide. The bulky paper has improved paper strengths, e.g., tensile strength, without increasing the paper density, and is satisfactory in optical properties such as opaqueness and whiteness.</p> |
