Fiber assembly-forming method and fiber assembly-forming apparatus
A fiber assembly-forming method includes forming a web containing a plurality of fibers charged to a first polarity on a transport belt charged to a second polarity opposite to the first polarity and applying a liquid to the web formed on the transport belt from a nozzle of a liquid coater. The liquid contains a binder binding the fibers.
1. A fiber assembly-forming apparatus comprising:
a transport belt on which a web containing a plurality of fibers charged to a first polarity is formed, the transport belt being charged to a second polarity opposite to the first polarity; and
a liquid coater applying a liquid to the web formed on the transport belt from a nozzle,
wherein the liquid contains a binder binding the fibers.
2. The fiber assembly-forming apparatus according to claim 1 , wherein the liquid contains water and the water fraction of the web coated with the liquid is 15.0% or more.
3. The fiber assembly-forming apparatus according to claim 2 , wherein the water fraction is 17.7% to 35.0%.
4. The fiber assembly-forming apparatus according to claim 1 , further comprising:
a disintegration section disintegrating a feedstock containing a plurality of fibers; and
a deposition section depositing disintegrated matter obtained by disintegrating the feedstock on the transport belt to form the web on the transport belt.
5. The fiber assembly-forming apparatus according to claim 1 , further comprising a charge enhancement section enhancing the charge of the fibers contained in the web formed on the transport belt.
6. The fiber assembly-forming apparatus according to claim 1 , further comprising a pressurizing portion pressurizing the web formed on the transport belt before the liquid is applied to the web, wherein the pressurizing portion includes a first calender roller in contact with the web and a second calender roller in contact with the transport belt, the first calender roller is charged to the first polarity, and the second calender roller is grounded.
7. The fiber assembly-forming apparatus according to claim 1 , wherein the liquid coater is an ink jet head.
8. The fiber assembly-forming apparatus according to claim 1 , further comprising a charging section that charges the transport belt to the second polarity.