A proppant discharge system has a container with an outlet positioned in a bottom thereof and a gate affixed adjacent the outlet so as to be movable between a first position covering the outlet to a second position opening the outlet, and a support structure having an actuator thereon. The container is removably positioned on the top surface of the support structure. The actuator is engageable with gate so as to move the gate from the first position to the second position. A conveyor underlies the container so as to receive proppant as discharged from the container through the outlet. The container can be a ten foot ISO container.

According to a first aspect of the disclosure, there is provided a manufacturing method for a can container including forming a diameter-reduced portion with a die necking tool at one end of a can body whose surface is not formed with a varnish layer, wherein a coefficient of dynamic friction between the die necking tool and the can body is 0.30 or less. In addition, according to a second aspect of the disclosure, there is provided a can container including a can trunk portion, a bottom portion provided on one end side of the can trunk portion, and a diameter-reduced portion having an outer diameter reduced at the other end side of the can trunk portion, wherein a varnish layer is not formed on an outer surface of at least the diameter-reduced portion.

A collapsible container includes a lower frame, an upper frame, lateral plates, and a pair of lid plates. On the upper frame or the pair of lid plates, a plurality of positioning protrusions is provided to protrude upward along a circumferential edge of the upper frame. An installation surface of a bottom plate includes a first groove into which the positioning protrusions of a lower one of each pair of vertically adjacent collapsible containers stacked up are fitted, a second groove into which the positioning protrusions of a lower one of each pair of vertically adjacent collapsible containers stacked in a pinwheel configuration are fitted, and a plurality of third grooves that is formed parallel to long sides of the bottom plate and into which support rails are fitted. The third grooves are smaller in depth from the installation surface than the first groove and the second groove.

A proppant discharge system has a container with an outlet formed at a bottom thereof and a gate slidably affixed at the outlet so as to be movable between a first position covering the outlet to second position opening the outlet, and a support structure having an actuator thereon. The container is removably positioned on the top surface of the support structure. The actuator is engageable with gate so as to move the gate from the first position to the second position. A conveyor underlies the container so as to receive proppant as discharged from the container through the outlet. The container is a ten foot ISO container.

A proppant discharge system has a container with an outlet formed at a bottom thereof and a gate slidably affixed at the outlet so as to be movable between a first position covering the outlet to second position opening the outlet, and a support structure having an actuator thereon. The container is removably positioned on the top surface of the support structure. The actuator is engageable with gate so as to move the gate from the first position to the second position. A conveyor underlies the container so as to receive proppant as discharged from the container through the outlet. The container is a ten foot ISO container.

Provided is a can container including a reduced diameter portion and a can barrel portion, in which the amount of a lubricant present at the reduced diameter portion is equal to or less than 2 mg/can. Also provided is a manufacturing method for a can container. The manufacturing method includes: a forming process of forming a can body having a tubular shape from a sheet material including a metal sheet and a resin film layer covering at least one surface of the metal sheet or from a sheet material including a metal sheet; a lubricating process of applying a lubricant to the can body formed; a diameter reducing process of reducing a diameter of a part of the can body to form a reduced diameter portion; and a printed layer forming process of forming an ink print layer on an outer peripheral surface of the can body.