The present disclosure describes a textile article for radio frequency (RF) absorption and attenuation. The textile includes a laminate that is formed via curing a wet laminate at room temperature for a cure time, the wet laminate comprising a resin substrate and a reinforced fiber matrix. The reinforced fiber matrix may include one of a bamboo fiber matrix, a cotton fiber matrix, a polyester fiber matrix, a nylon fiber matrix, or a wool fiber matrix. The resin substrate may include a first portion of iron oxide particles and a second portion of the elastic polymer solution, the first portion of iron oxide particles being based at least in part on an RF signal range that the textile article is configured to absorb and attenuate. For example, the iron oxide particles may include Fe.sub.3O.sub.4Fe, Fe.sub.3O.sub.4Ni, or Fe.sub.3O.sub.4, and/or so forth.

The present disclosure describes a textile article for radio frequency (RF) absorption and attenuation. The textile includes a laminate that is formed via curing a wet laminate at room temperature for a cure time, the wet laminate comprising a resin substrate and a reinforced fiber matrix. The reinforced fiber matrix may include one of a bamboo fiber matrix, a cotton fiber matrix, a polyester fiber matrix, a nylon fiber matrix, or a wool fiber matrix. The resin substrate may include a first portion of iron oxide particles and a second portion of the elastic polymer solution, the first portion of iron oxide particles being based at least in part on an RF signal range that the textile article is configured to absorb and attenuate. For example, the iron oxide particles may include Fe.sub.3O.sub.4Fe, Fe.sub.3O.sub.4Ni, or Fe.sub.3O.sub.4, and/or so forth.

An apparatus and method for the automated manufacturing of three-dimensional (3D) composite-based objects is disclosed. The apparatus comprises a material feeder, a printer, a powder system, a transfer system, and optionally a fuser. The method comprises inserting a stack of substrate sheets into a material feeder, transferring a sheet of the stack from the material feeder to a printer, depositing fluid on the single sheet while the sheet rests on a printer platen, transferring the sheet from the printer to a powder system, depositing powder onto the single sheet such that the powder adheres to the areas of the sheet onto which the printer has deposited fluid, removing any powder that did not adhere to the sheet, optionally melting the powder on the substrate, and repeating the steps for as many additional sheets as required for making a specified 3D object.

Provided is a useful improvement in a manufacturing method of a CF-SMC using a partially split continuous carbon fiber bundle. The manufacturing method of an SMC of the present invention includes (i) a step of drawing out a continuous carbon fiber bundle (10) from a package, the continuous carbon fiber bundle (10) having a filament number of NK and partially split into n sub-bundles in advance, (ii) a step of chopping the continuous carbon fiber bundle (10) drawn out from the package with a rotary cutter (234) into chopped carbon fiber bundles (20), and (iii) a step of depositing the chopped carbon fiber bundles (20) on a carrier film (41) traveling below the rotary cutter (234) to form a carbon fiber mat (30). In the manufacturing method, due to a fragmentation processing, in which at least some of the chopped carbon fiber bundles before being deposited on the carrier film (41) are fragmented by being brought into contact with a rotating body, a distribution of the filament number of the chopped carbon fiber bundles in the carbon fiber mat (30) is made different from that when the fragmentation processing is not performed.

A ready to use surface veil and surface film integrated prepreg layer suitable to use in a production of lightweight structural parts/panels with class A surfaces includes a curable bottom base resin formulation including a curable bottom base resin, at least one first toughening agent, at least one accelerator, at least one curing agent and at least one hardener. The prepreg layer further includes a release paper coated with the curable bottom base resin formulation to obtained curable bottom base resin formulation coated release paper as a first resin film; a reinforcement fabric; an outer resin formulation including an outer resin, wherein the outer resin is the curable bottom base resin being 10% more viscous than a resin, at least one thermoplastic toughening agent, at least one accelerator, at least one curing agent and at least one hardener agent.

The present disclosure provides an impregnation device for a fiber prepreg, which includes a film layer separation assembly, a hot pressing element, and a thermal barrier element. The hot pressing element is disposed beneath the film layer separation assembly. The thermal barrier element is disposed between the film layer separation assembly and the hot pressing element. The present disclosure also provides an impregnation method for a fiber prepreg.

The present disclosure provides an impregnation device for a fiber prepreg, which includes a film layer separation assembly, a hot pressing element, and a thermal barrier element. The hot pressing element is disposed beneath the film layer separation assembly. The thermal barrier element is disposed between the film layer separation assembly and the hot pressing element. The present disclosure also provides an impregnation method for a fiber prepreg.

A resin impregnation measurement system includes first electrodes, second electrodes, a measurement controller, and an impregnation ratio deriving unit. The first electrodes extend in parallel. The second electrodes are disposed so as to oppose to the first electrodes across a container and extend in a direction intersecting the first electrodes. The container is configured to be filled with a resin. The measurement controller is configured to sequentially switch between the first electrodes and the second electrodes and measure electrostatic capacities of measurement regions where the first electrodes are opposite to the second electrodes. The impregnation ratio deriving unit is configured to derive an impregnation ratio of the resin to the fiber base material in the container on a basis of a distribution of the electrostatic capacities of the measurement regions.

A fiber body forming method includes a step of applying, to a fiber body containing fibers, a liquid containing a thermoplastic resin which binds the fibers; and a step of heating the fiber body to which the liquid is applied, and in this method, the thermoplastic resin has a glass transition temperature of 10° C. or less, and the thermoplastic resin in the liquid has an average particle diameter of 30 nm or less.

A fiber body forming method includes a step of applying, to a fiber body containing fibers, a liquid containing a thermoplastic resin which binds the fibers; and a step of heating the fiber body to which the liquid is applied, and in this method, the thermoplastic resin has a glass transition temperature of 10° C. or less, and the thermoplastic resin in the liquid has an average particle diameter of 30 nm or less.