To obtain a heat-shrinkable nonwoven fabric using a latently crimpable fiber, which has low autohesion, excellent handleability and deliverability in the case of winding into a roll shape and develops a desired heat shrinkage in a fixed process.
The heat-shrinkable nonwoven fabric comprises a latently crimpable fiber and contains 1-6 wt.% of an inorganic filler in the latently crimpable fiber. The heat-shrinkable nonwoven fabric for forming a three- dimensional sheet comprises laminating a second fiber layer which is substantially not heat-shrinkable at the temperature to start the shrinkage of the heat- shrinkable nonwoven fabric or below to one side or both the sides of the heat- shrinkable nonwoven fabric which comprises the latently crimpable fiber and contains 1-6 wt.% of the inorganic filler in the latently crimpable fiber and partially bonding the heat-shrinkable nonwoven fabric to the second fiber layer.
SAKA WATARU
MIYAMOTO TAKANOBU
ASANO KOJI
