Kao Corporation

Koji Asano

Yasuo Toyoshima

Wataru Saka

Takanobu Miyamoto

Yasuhiro Komori

Hiroko Sugiura

Noriko Sakamoto

Manabu Kaneta

Taiki Uchiyama

A topsheet for absorbent articles having absorbing performance for smoothly transferring liquid body waste, e.g., menstrual blood or urine, to an underlying absorbent member and surface characteristics such that the surface thereof in contact with wearer's skin is soft enough not to cause skin irritation. The topsheetcomprises a first layerdisposed on the side of a wearer and a second layerdisposed on the side of an absorbent member, the first layer and the second layer being partly joined together, and having protrusions and depressions on the side of a wearer, wherein the first and second layers each comprise a fiber aggregate, the first layer has fusion-bonded fiber intersections, the first layer has an apparent thickness (t) of 0.1 to 5 mm, the second layer has an apparent thickness (t) of 0.2 to 3 mm, the apparent thickness ratio of the first layer to the second layer (t/t) is 0.5 to 8, the first layer has a fiber density (d) of 0.001 to 0.05 g/cm, the second layer has a fiber density (d) of 0.03 to 0.2 g/cm, and the fiber density (d) of the second layer is higher than that (d) of the first layer.

Topsheet for absorbent article

A method for restoring bulkiness of nonwoven fabric which contains crimped thermoplastic fiber and is in a roll form is disclosed. The method comprises unwinding the nonwoven fabric from the stock roll, and blowing hot air to the unwound nonwoven fabric by a through-air technique to make the nonwoven fabric increase in bulkiness. The hot air is heated at a temperature lower than the melting point of the thermoplastic fiber and not lower than a temperature lower than that melting point by about 50&#xb0; C., and is blown for about 0.05 to 3 seconds.

Method for restoring bulkiness of nonwoven fabric

Growing community of inventors

Tochigi, Japan

Koji Asano