Patent ID: 9630850
Date: 2017-04-25
CPC Classifications: C01B,Y10T

Claim:
1. A method for making carbon nanotube film, comprising the following steps: providing two carbon nanotube arrays spaced from each other and arranged along an X direction, wherein the two carbon nanotube arrays comprises a plurality of carbon nanotubes; patterning the two carbon nanotube arrays to form two patterned carbon nanotube arrays successively defined as a first patterned carbon nanotube array, a second patterned carbon nanotube array; the plurality of carbon nanotubes of each of the two patterned carbon nanotube arrays form a predetermined pattern comprising a rectangle, a first triangle, and a second triangle; the first triangle and the second triangle are respectively located on two opposite sides of the rectangle, wherein the two opposite sides of the rectangle are perpendicular to the X direction; a first triangle base side and the rectangle share a first side, a second triangle base side and the rectangle share a second side opposite to the first side; and a distance between a first triangle vertex and the first triangle base side is equal to a distance between a second triangle vertex and the second triangle base side; pulling out a first carbon nanotube film preform from the first triangle vertex angle in the first patterned carbon nanotube array, until carbon nanotubes of the second triangle base side in the first patterned carbon nanotube array are pulled, wherein the first triangle vertex angle is opposite to the first triangle base side; pulling out a second carbon nanotube film preform from a first triangle vertex angle of the second patterned carbon nanotube array and connecting the carbon nanotube film preform to the second triangle base side in the first patterned carbon nanotube array, wherein the second triangle vertex angle is opposite to the second triangle base side; and pulling out the first carbon nanotube film preform, and a pulling direction is parallel to the X direction.