A production method of a long member including a large number of carbon nanotubes includes the steps of: (1) drawing the carbon nanotubes gradually from a first array to obtain a first web 10a; (2) bringing the first web 10a partially into contact with a first holder 12a to hold the first web 10a on the first holder 12a; (3) drawing the carbon nanotubes gradually from a second array to obtain a second web 10b; (4) bringing the second web 10b partially into contact with a second holder 12b to hold the second web 10b on the second holder 12b; and (5) placing a portion of the first web 10a and a portion of the second web 10b on each other to form a joint, the portions of the first and second webs 10a and 10b being in the vicinity of the first and second holders 12a and 12b, respectively, and being placed on each other such that width directions of the first and second webs 10a and 10b are substantially the same.

A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle θ of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.

A production method of a carbon nanotube yarn includes the steps of: (1) obtaining a web 40 including a large number of carbon nanotubes 36; (2) bringing a slider 24a into contact with the carbon nanotubes 36; and (3) moving the slider 24a in a direction to bundle the carbon nanotubes 36, the direction being inclined with respect to a direction in which the web 40 extends.

A production method of a carbon nanotube yarn includes the steps of: (1) obtaining a web 40 including a large number of carbon nanotubes 36; (2) bringing a slider 24a into contact with the carbon nanotubes 36; and (3) moving the slider 24a in a direction to bundle the carbon nanotubes 36, the direction being inclined with respect to a direction in which the web 40 extends.

The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

A contact pressure sensor detects a pressing force applied to a pressed body by a pressing body through a sensor portion disposed between the pressing body and the pressed body, wherein the sensor portion is formed of a knitting yarn including a carbon nanotube yarn, and the sensor portion includes a pressing body contact surface with which the pressing body comes into contact; a pressed body contact surface with which the pressed body comes into contact; knitting yarn intersecting portions formed between the pressing body contact surface and the pressed body contact surface; and void portions formed between the pressing body contact surface and the pressed body contact surface, the void portions being spaces in which the knitting yarn is not disposed.

The purpose of the instant invention is to provide a superfine carbon fiber thread with excellent bending strength and repeated bending. To achieve this purpose, (1) a desired composite thread is produced by opening open carbon fibers, slitting the opened fibers, twisting the slit fibers and forming a composite with a composite thread; and (2) a composite thread is produced by performing a lamination process with a film (film of composite materials) while performing a fiber-opening process, and then slitting, twisting and heating the tread for stress relief.

A method of making a flexible pipe layer, which method comprises: commingling polymer filaments and carbon fibre filaments to form an intimate mixture, forming yarns of the commingled filaments, forming the yarns into a tape, and applying the tape to a pipe body to form a flexible pipe layer.

A method of making a flexible pipe layer, which method comprises: commingling polymer filaments and carbon fibre filaments to form an intimate mixture, forming yarns of the commingled filaments, forming the yarns into a tape, and applying the tape to a pipe body to form a flexible pipe layer.