A method for producing a film of the present invention includes an electrostatic spraying step of electrostatically spraying a liquid composition directly on the surface of skin to form a film on the skin by using an electrostatic spray device. The electrostatic spray device includes a container capable of storing the liquid composition, a nozzle configured to eject the liquid composition, and a power supply configured to apply a voltage to the nozzle. The liquid composition contains component (a): one or two or more volatile substances selected from alcohols and ketones, component (b): a water-insoluble polymer having film formability, and component (c): 0.2% by mass or more and 25% by mass or less of water.

A disposable fluid delivery system for an electrostatic applicator. The system includes a nozzle housing comprising an air supply port, a voltage port, and a delivery outlet. A voltage wire has a contact in communication with a delivery tube in fluid communication with the delivery outlet. A syringe includes a barrel portion and a plunger configured to advance fluids from within the barrel portion and through the delivery tube. A cartridge housing can at least partially enclose the nozzle housing, the voltage wire, and the syringe.

Systems, apparatuses, and methods for reducing humidity of air adjacent to a nozzle of an electrospinning apparatus, charged solution output by the nozzle, a solution path between the nozzle and a deposit surface, and/or the deposit surface. The apparatus can be configured to controllably output the charged solution and gas of a predetermined dryness for deposit of the charged solution on the deposit surface. The gas of the predetermined dryness can be provided adjacent to a nozzle tip of the nozzle from where the charged solution is output. The gas of the predetermined dryness may be output in a predetermined direction toward a focal point at, in front of, or behind the nozzle tip.

A system can include a reservoir configured to hold working material, a decontamination module configured to remove contaminants from the working material, a flow control mechanism configured to regulate working material flow between the reservoir and the decontamination module, and a manifold fluidly connecting the reservoir to the decontamination module.

Disclosed is an electrostatic coating apparatus comprising: an atomizing head cleaning flow path (13) which is disposed at a coating machine (3) and through which a cleaning fluid for cleaning a rotary atomizing head (6) and a front end of a feed tube (8C) of a cartridge (8) flows; a cleaning fluid flow path (14) connecting a cleaning fluid supply source (15) with the atomizing head cleaning flow path (13); a cleaning fluid valve (16) disposed in the cleaning fluid flow path (14) and configured to open and close the cleaning fluid flow path (14); a discharge air flow path (17) connected to the atomizing head cleaning flow path (13) and through which the discharge air flows; a cleaning fluid discharge flow path (20) connected to the cleaning fluid flow path (14) at a connection point (D) located between the atomizing head cleaning flow path (13) and the cleaning fluid valve (16); a discharge air switching valve (21) disposed in the atomizing head cleaning flow path (13) and configured to open and close the atomizing head cleaning flow path (13); and a cleaning fluid discharge valve (22) disposed in the cleaning fluid discharge flow path (20) and configured to open and close the cleaning fluid discharge flow path (20).

An isolation valve for a fluid spray system includes an inlet module for receiving fluid from a main reservoir, an outlet module for providing fluid received from the inlet module to a sprayer, and an actuating module for driving the inlet module between a connected state and an isolated state. The inlet module is mechanically and fluidly connected to the outlet module in the connected state. The inlet module is spaced from the outlet module thereby generating an air gap and electrically isolating the inlet module from the outlet module in the isolated state. The outlet module includes a wash system that draws wash fluid from a wash reservoir as the inlet module transitions to the connected state and drives the wash fluid to clean a portion of the inlet module as the inlet module transitions from the connected state to the isolated state.

Provided is a method for forming a coating comprising fibers having an excellent adhesivity to the skin, comprising directly electrostatically spraying on the skin.

A method for producing a coating comprising fibers on the surface of skin or nail, comprising directly electrostatically spraying onto human skin or nail, composition A comprising the following components (a), (b) and (c):

(a) one or more volatile substances selected from the group consisting of an alcohol and a ketone,
(b) a water-insoluble polymer for fiber formation,
(c) 0.2 mass % or more and 25 mass % or less of water; wherein the mass ratio of component (b) to component (c), ((b)/(c)) is of 0.4 or more and 50 or less.

A fluid sprayer includes a pump and an electrostatic module configured to provide an electrostatic charge to spray fluid. The electrostatic module is electrically connected to a conductive component of the fluid sprayer, such as a fluid displacement member, fitting, cylinder, or spray tip, to charge the spray fluid via the conductive component. The fluid is electrostatically charged prior to exiting the fluid sprayer.

An insulation device for a coating system for coating objects, the coating system having an electrostatically operating application apparatus having a dispensing device which dispenses a coating material, and at least one storage container which is connected to an input valve device via an inlet line and to the dispensing device via a supply line. The insulation device comprises a channel with a physical body which can move in the channel. The physical body has an electrically insulating material and can be moved by means of a fluid pressure between a park position and an insulation position and is designed such that, when it moves from the park position to the insulation position or from the insulation position to the park position, the physical body removes material from an inner casing surface of the channel, so that an electrical insulation path can be formed between the storage container and the input valve device.

A method for making functionally gradient coatings by 3D printing based on electrostatic spinning and electrostatic spraying is disclosed, which uses a hybrid 3D printing system based on electrostatic spinning and electrostatic spraying including: a first injection pump, a second injection pump, a first nozzle, a second nozzle, a high voltage power supply, a core rod collector, a controller, a motor and a speed-adjusting unit. The first injection pump, the first nozzle, the high voltage power supply, the core rod collector and the controller constitute an electrostatic spinning subsystem. The second injection pump, the second nozzle, the high voltage power supply, the core rod collector and the controller constitute an electrostatic spraying subsystem. The electrostatic spinning subsystem is controlled by the controller to generate a first material coating, and the electrostatic spraying subsystem is controlled by the controller to generate a second material coating. The method can make multiple layers of functional gradient coatings according to individual needs.