Abstract: A method for producing a Zostera marina fiber object includes mixing natural fibers with a solid binding agent and a fire retardant, heating the mixture above a melting and/or softening point temperature of the binding agent, forming the mixture into the shape of the natural fiber object and applying a coating of the fire retardant to the surface of the natural fiber object.

Abstract: A form liner for concrete can be produced according to a manufacturing process. An example manufacturing process includes providing a substrate material, and then printing a barrier substance onto the substrate material in an outline form of a desired pattern. After printing the barrier substance, the example manufacturing process includes printing an expandable foam material in a liquid state between the outline form of the barrier substance. The expandable foam material is then cured such that the expandable foam material is stiffened on the substrate material between the outline form of the barrier substance to provide the desired pattern on the substrate material for use as the form liner for concrete.

Abstract: A method for producing a three-dimensional object from a curable binder composition with an additive manufacturing process includes producing the curable binder composition in the setting state, preferably by mixing constituents of the curable binder composition in a mixing unit, conveying the curable binder composition in the setting state via a supply line to a printing head movable in at least one direction, applying the curable binder composition in the setting state with the printing head, preferably layer-by-layer, to form the three-dimensional object, determining a temperature of the curable binder composition in the mixing unit, in the supply line and/or in the printing head, adjusting the temperature of the curable binder composition in the mixing unit and/or in the supply line and/or adjusting the temperature of at least one of the constituents of the curable binder composition before adding it into the mixing unit.

Abstract: A mixer (1) comprises a drum (2) having at least one inlet (6) and one outlet (7). The mixer (1) furthermore comprises a drive (3) and a stirring shaft (4), which is arranged in the drum (2) and is coupled to the drive (3). Furthermore, the mixer (1) comprises a conveying device (5), which is arranged in the drum (2) and which is arranged on one and the same axis as the stirring shaft (4).

Abstract: There is described a computer-implemented method for handling a mixer truck containing a return concrete load. The method generally has: accessing return concrete data including at least quantity data indicative of a quantity of the return concrete load contained in the drum of the mixer truck and composition data indicative of a composition of the return concrete load contained in the drum; accessing ticket data including job tickets each including a ticket specification; establishing a list of eligible job tickets by comparing the return concrete data to each job ticket, and including a given one of the job tickets in the list contingent upon finding a match between the ticket specification and the return concrete data; and generating a signal indicative of the established list of eligible job tickets.

Abstract: A concrete mixer vehicle includes a controller that is configured to detect that an engine is in an idle condition and selectively shutdown the engine in response to detecting that one or more override conditions are met.

Abstract: Silicon carbide (SiC) wafers and related methods are disclosed that include intentional or imposed wafer shapes that are configured to reduce manufacturing problems associated with deformation, bowing, or sagging of such wafers due to gravitational forces or from preexisting crystal stress. Intentional or imposed wafer shapes may comprise SiC wafers with a relaxed positive bow from silicon faces thereof. In this manner, effects associated with deformation, bowing, or sagging for SiC wafers, and in particular for large area SiC wafers, may be reduced. Related methods for providing SiC wafers with relaxed positive bow are disclosed that provide reduced kerf losses of bulk crystalline material. Such methods may include laser-assisted separation of SiC wafers from bulk crystalline material.

Abstract: There is provided a thermoplastic resin pellet containing a thermoplastic resin (A) and a fibrous filler (B), in which a length-weighted average fiber length of the fibrous filler (B) is 5 mm or more and less than 50 mm, a pellet length of the thermoplastic resin pellet and the length-weighted average fiber length of the fibrous filler (B) are substantially the same, and a maximum cross-sectional height Rt of a surface of the thermoplastic resin pellet is less than 120 ?m.

Abstract: Examples relate to automated stringer compaction and forming techniques. An example technique involves heating one or more layers of fibrous material having thermally activatable material above an activation temperature of the thermally activatable material and forming, by a forming tool, the one or more layers having thermally activatable material into a first fabric subelement. The forming tool is adjusted based on a first set of dimensions corresponding to the first fabric subelement. The technique also involves removing the first fabric subelement from the forming tool, integrating the first fabric subelement into a preform to form a complete element where the preform includes at least the first fabric subelement and a second fabric subelement. The technique further involves infusing, within a mold tool, the complete element with resin, and curing the complete element infused with resin to form the composite structure (e.g., a composite stringer).

Abstract: A plastic burning furnace system is disclosed. The system can accommodate different plastic waste sizes and is adaptable for both commercial and residential use. The system comprises an upright stainless-steel cylinder with a secure trap door for introducing plastic waste for recycling. A controllable burner initiates melting and burning at the bottom of the cylinder. Smoke resulting from the process is effectively filtered through a series of carbon filters positioned inside the cylinder, and a heat-safe extension cap safely releases the treated fumes into the atmosphere. The molten plastic is poured into color and size-varied disc molds for creating discs for reuse/discardment. The system also includes a smoke meter for providing real-time feedback on smoke levels and a protective boundary for the safety of users.

Abstract: A plastic burning furnace system is disclosed. The system can accommodate different plastic waste sizes and is adaptable for both commercial and residential use. The system comprises an upright stainless-steel cylinder with a secure trap door for introducing plastic waste for recycling. A controllable burner initiates melting and burning at the bottom of the cylinder. Smoke resulting from the process is effectively filtered through a series of carbon filters positioned inside the cylinder, and a heat-safe extension cap safely releases the treated fumes into the atmosphere. The molten plastic is poured into color and size-varied disc molds for creating discs for reuse/discardment. The system also includes a smoke meter for providing real-time feedback on smoke levels and a protective boundary for the safety of users.

Abstract: A treatment method for EVA waste materials includes the following steps: step 1: crushing waste EVA shoe soles, waste EVA sheets, and waste EVA trimmings to obtain block-shaped crushed materials with a length of less than 7 cm and a width of less than 5 cm; then, putting the block-shaped crushed materials into a waste crusher to obtain strip-shaped crushed materials; step 2: putting the strip-shaped crushed materials obtained in step 1, Surlyn resin, and PMP into an internal mixer in a weight ratio of 85:(4-10):(4-8), wherein an internal mixing temperature gradually rises, a highest temperature of the internal mixing temperature is 150° C., and an internal mixing time is 18 to 25 minutes, so as to obtain block-shaped mixed materials; and step 3: processing the block-shaped mixed materials, which have been subjected to internal mixing by a screw extruder and an open mill to obtain an EVA recycled film.

Abstract: The present disclosure concerns a method of fabricating a curved 2D membrane comprising providing a curved polymer template on a support, flowing a solution of 2D material through the curved polymer template in order to form 2D multilayers on the curved polymer template and separating the 2D multilayers from the curved polymer template in order to form the curved 2D membrane. The curved 2D membrane is 10 characterised by a hyperbolic paraboloid curvature. The curved 2D membrane is characterised by a multi-layered lamellar morphology.

Abstract: Tooling for manufacturing an air deflection cascade for a thrust reverser system of an aircraft nacelle includes a plurality of spars, each spar being connected to at least one adjacent spar by a plurality of deflection vanes. The tooling includes at least one molding bar and at least one molding column of a row of vanes, comprising two opposing lateral faces extending along the longitudinal direction of the tooling, and comprising molding cavities. The tooling includes a fixed structure on which the molding bar and the molding column are mounted. The fixed structure enabling a translational movement, along a transverse direction of the tooling, of the molding bar. The tooling includes a compression device to provide the compression of elements made of a composite material arranged in the tooling and intended to form at least one part of the cascade to be manufactured.

Abstract: A method for manufacturing a window for a polishing pad is disclosed. The method includes: a) mixing a curing agent with a polyurethane prepolymer having a temperature of 50° C. or higher to less than 100° C. to prepare a mixture; b) injecting the mixture into a mold heated to a temperature of 30° C. or higher to less than 100° C. to a thickness of 5 mm or less; c) demolding a polyurethane cured product from the mold; and d) processing the polyurethane cured product to a thickness of the window of the polishing pad. A polishing pad including the window is also disclosed.

Abstract: An injection molding method which can isolate injection materials from flowing into the sensing area includes: providing an injection mold comprising a first mold and a second mold; placing a component to be packaged on the second mold; arranging a sealant on a non-sensing area of the component to be packaged; placing the first mold on the component to be packaged; injecting a molding material and curing the molding material to form an encapsulation portion; removing the injection mold. A packaging structure and a camera module carrying it are also disclosed.

Abstract: In an injection molding machine including a first nozzle and a second nozzle that injects resin into a mold from the first nozzle through the second nozzle, a distance between the second nozzle and the mold is changed with movement of at least the second nozzle in a first direction, and the second nozzle is displaceable in a second direction in a state in which the mold is fixedly secured relative to the first nozzle and the second nozzle is in contact with the first nozzle.

Abstract: A method of adjusting a molding condition parameter of a molding machine includes determining change values of a plurality of molding condition parameters set in a molding machine in a molding process cycle, determining change timings of the plurality of parameters determined as objects to be changed with reference to timing information when the change values of the plurality of molding condition parameters are determined, and sequentially changing the plurality of parameters determined as objects to be changed according to the determined change timings.

Abstract: A biaxially oriented polyethylene film structure comprises at least three layers, at least one layer comprising a polyethylene composition, the polyethylene composition having a density of from 0.941 to 0.962 g/cm3; a melt index, I2 of from 0.5 to 5.0 g/10 min; and a molecular weight distribution Mw/Mn, of from 3.0 to 8.0. The biaxially oriented film has good optical properties.

Abstract: An on-orbit composite filament forming device for space 3D printing includes a constant tension unwinding module, a replaceable resin filament rotary wrapping module, a melt preheating chamber, a curved channel impregnation chamber, a variable aperture resin recovery device, a heat protective housing, a convective cooling device, a traction device, and a winding device. The replaceable resin filament rotary wrapping module wraps a resin filament on a surface of a carbon fiber by circumferential rotation and is provided with an active unwinding reel placed on a circular rail centered on the carbon fiber; the melt preheating chamber is used for melting resin to wrap the surface of the fiber, and is equipped with a lifting device for automatic opening and closing; the curved channel impregnation chamber is formed with a wedge-shaped high-pressure impregnation zone by mutual extrusion of upper and lower pressure blocks, thereby improving the quality of fiber impregnation.

Abstract: An extrusion system comprising an ultrasonic component that includes an ultrasonic transducer having an ultrasonic transducer body; and an extrusion apparatus configured to receive ultrasonic vibrations from the ultrasonic component, wherein the extrusion apparatus includes a rotating extruder screw housed within a heated barrel and wherein the heated barrel is configured to receive material to be extruded therein; a connector coupled with the ultrasonic transducer body and the rotating extruder screw, wherein the connector directs ultrasonic energy from the ultrasonic transducer directly into the entire rotating extruder screw in a longitudinal manner; and an extrusion die connected to the barrel, wherein the extrusion die is configured to receive and process the material from the barrel.

Abstract: Methods for cleaning a die face for an extruder include: positioning an articulating tool adjacent the die face while the die face is installed on the extruder, the die face defining a plurality of die orifices; triggering operation of the articulating tool and thereby articulating an end effector coupled to the articulating tool; and contacting the end effector against one or more surfaces of the die face and thereby removing fouling from the die plate. Methods may include: pausing production of a polymer pellet product from the extruder when at least one of the pressure at the die or a polymer pellet product properties indicates fouling at the die; removing a polymer residue from one or more orifices in the die with an articulating tool equipped with an end effector while the die is mounted on the extruder; and resuming production of the polymer pellet product.

Abstract: A method for producing reels of plastic film by cast extrusion process is described. The steps include causing the film to flow from an extrusion head slit, adjusting its thickness, drawing the exiting film with an internally cooled roll, winding the film downstream of the roll to form reels of film, measuring the thickness of the film and adjusting the thickness of the film based on the thickness measurements provided by the thickness measuring device. The method further includes measuring a reference quantity of the film reels produced, comparing the reference quantity measured value with a design value of the reference quantity corresponding to the design value of the thickness of the film and if the measured value is different from the design value of the reference quantity, acting on adjustment means and/or on the thickness measuring device to obtain a desired film thickness.

Abstract: A temperature adjustment mold for a blow molding apparatus provided with at least an injection molding unit that injection-molds a preform made of a resin and having a bottomed shape, a temperature adjusting unit that adjusts a temperature of the preform manufactured by the injection molding unit, and a blow molding unit that blow-molds the preform to manufacture a resin container, the temperature adjustment mold including a cavity mold that accommodates the preform, and an air introduction member that includes a fitting core and a rod member with a multiple-tube structure to form at least three concentric air flow paths.

Abstract: A multi-arm forming device for space on-orbit composite braiding is provided. Through the rotary movement of a combination of circularly arranged mechanical arm-type laying apparatuses relative to a mold, a plurality of hot press laying heads are controlled together to implement high-efficiency and high-freedom winding and braiding formation of a composite member. The retraction and expansion deformation of the gasbag mold is achieved by inflating and deflating based on design, and the overall device is lightened by switching its structural volume in an operating/non-operating state, thereby achieving the purpose of facilitating the lift-off of rockets and the demolding, repair and weight reduction of winding and braiding structural members for operation in space. Additionally, gas in a gasbag can be used as emergency kinetic energy for the movement and attitude adjustment of the overall device in space. High-quality and efficient winding and braiding formation of composites in space are achieved ultimately.

Abstract: A unit for belling PVC-O thermoplastic pipe includes: a forming pad for deforming into bell shape an end of the pipe, the pad having a longitudinal central axis of symmetry and a region for housing an annular gasket to be coupled, internally, to the pipe; an annular contact element fitted slidably on said pad to move along the direction of the axis, between an advanced position contacting the gasket, and a withdrawn position. A first heating device heats the contact element to a predetermined temperature by contacting an inner surface of the end portion of the pipe fitted on the annular contact element. A second heating device externally heats the pipe fitted on the pad, in a predetermined zone of the pad at the end of the pipe.

Abstract: Methods of forming an ophthalmic element via generating a map of data values associated with pixels included in an energy transmissibility pattern. Data values correspond with an amount of energy transmissible through the optical element at a pixel location. The data values may be converted to additive manufacturing printhead control commands. A first print pattern of polymerizable mixture is emitted as droplets from a manufacturing printhead. The first print pattern of polymerizable mixture corresponding with the map of data values associated with pixels included in an energy transmissibility pattern. At least a portion of the droplets are received on a receiving surface.

Abstract: A method of forming a three-dimensional structure using droplet-based freeform printing is provided. The method includes depositing a structural material through one or more nozzles onto a surface of a substrate by droplet-based freeform printing, such as inkjet printing, to form one or more three-dimensional structures including a smooth surface and one or more cross-sectional dimensions. The structural material undergoes a liquid-to-solid transition after deposition of the structural material, and the one or more cross-sectional dimensions are controlled by a droplet ejection frequency.

Abstract: The present invention provides a granular material for a fused deposition three-dimensional printer that enables a flexible molded object to be manufactured with high precision. According to the present invention, provided is a granular material for a fused deposition three-dimensional printer. The granular material is formed of a thermoplastic elastomer, and thermoplastic elastomer has a Shore A hardness of 0 to 10 and a melt flow rate of 10 to 200 g/10 min at least one of measurement temperatures of 120 to 230° C.

Abstract: Techniques and systems are used to fabricate relatively large composite structures. Fabrication may be performed automatically by a system comprising a relatively large robotic structure configured to hold and to operate various interchangeable end effectors, each having respective functions for fabricating composite structures. The end effector is positioned by the fabricating system to perform various fabrication functions, such as 3D printing, among other things. The fabricating system may include an x-y-z positioning system, a staging area to accommodate a mold, one or more end effectors, an applicator attached to the end effector, and a docking station to store multiple end effectors.

Abstract: A system for forming a non-metallic component including an integral secondary material is disclosed herein. The system includes a print bed, a consumable film disposed on the print bed, a secondary material disposed on the consumable film, and an extruder configured to extrude a non-metallic material to form a non-metallic component on the secondary material, wherein the secondary material is monolithic with the non-metallic component.

Abstract: Aspects disclosed herein related to a method of manufacturing a beverage pod that comprise loading successive layers of a beverage material, such as coffee, onto a print bed of a three-dimensional (3-D) printer. A binder is then applied to each of the successive layers of beverage material in a predetermined pattern to bond the beverage material in the predetermined pattern. The predetermined pattern corresponds to a sequential cross-sectional layer of an object model of the beverage pod where the object model describes sequential cross-sectional layers of the beverage pod designed based on a plurality of different brewing attributes.

Abstract: A hybrid manufacturing method comprising providing a base member, the base member comprising a metallic portion provided with a coating; providing a surface treatment to all or part of the coating, the surface treatment comprising a mechanical, a chemical and/or a physical treatment, to obtain a treated base surface; and forming an additional part onto the treated base surface by additive manufacturing.

Abstract: A printing system for forming a strand of construction material for 3D printing of a construction part includes a printing head, a parallel robot, in particular a delta robot, and a coarse movement device. The printing head is designed to discharge construction material out of the printing system and to shape the construction material to form the strand of construction material. The parallel robot has at least three robot arm devices for fine positioning of the printing head with respect to the coarse movement device. At least the two closest of the robot arm devices are mutually offset in a circumferential direction about a central axis of the parallel robot by an obtuse arc angle. The coarse movement device is designed for a coarse movement of the parallel robot together with the printing head.

Abstract: A 3D printing apparatus includes a substrate stage configured to support a substrate, a droplet ejector including at least one droplet nozzle configured to discharge a photo-curable droplet on the substrate, a first photo curing unit configured to irradiate light to a drop path along which the droplet discharged from the droplet nozzle falls to change a viscosity of the droplet, and a second photo curing unit configured to irradiate light onto the droplet that has landed on the substrate to cure the droplet.

Abstract: A liquefier assembly for use in an extrusion-based additive manufacturing apparatus, includes: a liquefier tube extending between an inlet opening and an outlet opening. The liquefier tube is configured to facilitate the transport of the consumable material through the liquefier assembly between the inlet opening and the outlet opening. A nozzle assembly is coupled to the outlet opening of the liquefier tube and configured to extrude the consumable material in a first direction. A heater block assembly is disposed around at least a portion of the liquefier tube and configured to heat consumable material in the liquefier tube. The first recess exhibits, in section, at least one boundary edge configured to converge thermal radiation in substantially the first direction or a direction having an angle to the first direction.

Abstract: An apparatus for the layer-by-layer formation of three-dimensional objects. The apparatus includes a gas extraction system and an enclosed working space. The working space includes a working space inlet allowing gas to enter, a working space outlet allowing gas to exit, and a build bed surface in which a the object is formed. The gas extraction system includes: a primary conduit having a first primary inlet, a first interfacing inlet, and a primary outlet connectable to an external extraction source; and a first secondary conduit having a first secondary inlet and outlet. The first secondary inlet is in fluidic communication with the working space. The first secondary outlet is in fluidic communication with the first interfacing inlet. The gas extraction system further includes a flow controller to control the flow of gas from the working space into the first secondary conduit, and thereafter into the primary outlet.

Abstract: In the field of laser spectroscopy, a method for making customizable three-dimensional printed microplates using customizable additive and subtractive manufacturing such as 3D printed microplates for high-throughput laser spectroscopy is disclosed.

Abstract: In some examples, an object manufactured by an additive manufacturing process includes a lattice structure having a first region filled with conformal lattice cells of different characteristics, and a second region filled with uniform lattice cells some of which are trimmed.

Abstract: According to one embodiment, a method, computer system, and computer program product for 3D printing is provided. The present invention may include identifying one or more physical objects to be infused within an object being 3D printed; generating at least one digital model of the one or more identified physical objects; analyzing a digital model of the object being 3D printed; determining one or more identified physical object that can be infused within the object being 3D printed; modifying the digital model of the object being 3D printed to comprise an internal physical object infused within the object being 3D printed; and printing the object being 3D printed over the internal physical object. Additionally, according to one embodiment, a method for manufacturing a three-dimensional product is provided. Additionally, according to one embodiment, a data processing device for 3D printing is provided.

Abstract: Various systems and process for fabricating customized medical devices via the freeform reversible embedding of suspended hydrogels process are disclosed. The mechanical properties of the fabricated objects can be controlled according to the manner or orientation in which the structure material is deposited into the support material and the three-dimensional movement of the extruder assembly. Further, the dimensions of the fabricated objects can be validated by adding a contrast agent to the structure material, obtaining a three-dimensional reconstruction of the fabricated object, and then comparing the three-dimensional reconstruction to the computer model upon which the fabricated object is based. These and other techniques are described herein.

Abstract: A method for parallel additive manufacturing includes receiving a three-dimensional digital model file of an object for construction utilizing multiple additive manufacturing devices. The method also includes determining a decomposition of the three-dimensional digital model file of the object into multiple portions and instructing each additive manufacturing device from the multiple additive manufacturing devices to generate at least one portion from the multiple portions of the object. The multiple additive manufacturing devices operate in parallel to generate the multiple portions of the object. The method also include constructing the object with the multiple portions generated by the multiple additive manufacturing devices.

Abstract: In one example in accordance with the present disclosure, an additive manufacturing system is described. The additive manufacturing system includes an agent distribution device to selectively deposit an agent onto a layer of build material to form a layer of a three-dimensional (3D) object. The additive manufacturing system also includes a carriage to transport the agent distribution device across the layer of build material. The additive manufacturing system also includes an array of build material thermal sensors disposed on the carriage and facing the layer of build material. Each build material thermal sensor is to measure a temperature of the layer of build material in a particular region. A controller adjusts additive manufacturing based on an output of an associated build material thermal sensor.

Abstract: The invention discloses a method and system to digitally compensate for reactivity inhomogeneities of a photoresponsive material within a build volume of an additive manufacturing system, which offers significant advantages for the production of high-fidelity and high-accuracy three-dimensional objects. The method comprises a) Providing a digital model of said three-dimensional object, b) defining a sequence of patterns of light (31) from said digital model, and c) irradiating with each of said patterns of light (31) according to the defined sequence a photoresponsive material (32) that is capable of alteration of its material phase upon irradiation by light, thereby creating a three-dimensional distribution of alterations within the photoresponsive material (32) which physically reproduces said three-dimensional object, thereby creating the three-dimensional object.

Abstract: A method for 3D printing a part with an additive manufacturing system includes printing a first portion of a part in a layerwise manner and analyzing a topology of the first portion of the part. The method includes determining a tool path for printing a second portion of the part on a surface of the first portion of the part, and pre-heating the first portion of the part along the tool path as a function of the topological analysis of the first portion of the part. The method includes printing the second portion of the part along the tool path.

Abstract: Described are additive manufacturing methods and systems that can deposit an occluding material in the form of a “cocoon” over previously deposited build material. The occluding material protects previously deposited layers from overexposure to the local environment and can allow exposure times of build material to be better controlled. The occluding material is removed following formation of the build product.

Abstract: Disclosed is a high-frequency welding apparatus for bonding a corner of an air mattress. The high-frequency welding apparatus includes a housing, an electrode plate disposed at one side of the housing such that a positive power supply is connected to the electrode plate, and configured to move in a horizontal direction so as to press shape maintenance member surrounding the corner, a surface plate disposed to collinearly face the electrode the shape maintenance member interposed plate with therebetween, and configured to support the pressed shape maintenance member, and an electrode pushing block and a surface plate pushing block formed of a metal and fixed to front ends of the electrode plate and the surface plate to apply high-frequency pressure to the shape maintenance member and to guide a melt to be injected into a space between the edges of the upper part and the lower part.

Abstract: The present invention relates to a sealing device, and more particularly, to a sealing device in which a temperature of a sealing surface of the sealing device is constantly maintained has an appropriate solvent is continuously heated using a phase change, thereby manufacturing a pouch sealing part having excellent quality in a product of a pouch type secondary battery. The sealing device according to the present invention includes a sealing body provided with a sealing surface, which is configured to seal a sealing target object, on one surface thereof, a solvent that is in contact with the other surface of the sealing body to supply heat to the sealing body, and a heat source configured to heat the solvent so that at least a portion of the solvent is phase-changed into a gas.

Abstract: A system and method for joining continuous fiber reinforced thermoplastic composites, comprising a first continuous fiber reinforced thermoplastic composite; a second continuous fiber reinforced thermoplastic composite positioned in a weld configuration with the first continuous fiber reinforced thermoplastic composite; and a laser of a predetermined wavelength having a predetermined spot size that applies a predetermined amount of power to a predefined region of the first composite and the second composite at a predetermined speed, thereby creating a weld between the first composite and the second composite.

Abstract: The present disclosure relates to a stitched electromagnetic wave-absorbing composite for low-speed impact protection, and particularly, to a composite that exhibits electromagnetic wave absorption performance and low-speed impact protection performance at the same time by applying a stitching method, a thickness direction reinforcement method, to a composite that is an electromagnetic wave absorber. The present disclosure provides a stitched electromagnetic wave-absorbing composite for low-speed impact protection including a composite composed of at least one of glass fiber, epoxy, or glass fiber reinforced plastics (GFRP) in an electromagnetic wave-absorbing composite, wherein the composite absorbs electromagnetic waves, and has an impact protection system applied thereto through stitching.