A molded article of a carbon fiber composite material includes at least carbon fibers and a resin composition. The molded article of a carbon fiber composite material is characterized in that the surface roughness Ra thereof is 0.01-2 μm and in that the tensile shear adhesive strength (F0) thereof when a metal has been adhered to the surface thereof via an adhesive layer that contains an epoxy compound and is 0.1-3 mm thick is 10-40 MPa.

A method for production and processing of a framed proton-conducting membrane for a fuel cell, comprises: providing of the proton-conducting membrane and a frame comprising at least two media ports inserting the membrane into a recess of the frame, processing of at least one surface of the frame such that a first region exists with an increased force of adhesion for a joining by means of gluing, and at least one second region exists with a lesser force of adhesion than the increased force of adhesion.

A process and system are provided for introducing a blend of chopped and dispersed fibers on an automated production line amenable for inclusion in molding compositions as a blended fiber mat for structural applications. The blend of fibers are simultaneously supplied to an automated cutting machine illustratively including a rotary blade chopper disposed above a vortex supporting chamber. The blend of chopped fibers and binder form a chopped mat. The chopped mat has a veil mat placed on either side, and is consolidated with the veil mat using heated rollers maintained at the softening temperature of thermoplastic binder, with consolidated mats being amenable to being stored in rolls or as flat sheets. A charge pattern is made using the consolidated mat, and the charge pattern can be compression molded in a mold maintained at a temperature lower than the melting point of the thermoplastic fibers.

This specification discloses an article of manufacture. The article of manufacture has at least one structural blank and at least one guide. The structural blank has a plurality of oriented fiber plies in a thermoplastic matrix. The guide has a plurality of random dispersed fibers in a thermoplastic matrix. The guide is affixed to the structural blank by injection molding and over molding the guide onto the structural blank. The article of manufacture can take a number of forms for use in industries such as aircraft, automobiles, motorcycles, bicycles, trains or watercraft.

A surface preparation method (200) for a composite material (104) having an original surface (110), the material (104) comprising fibres (104a) within a matrix (104b), comprises removing (204) a surface portion of the matrix (104b) by plasma ablation so as to reveal and activate (206) a new surface (120) with at least a portion of a plurality of the fibres (104a) exposed thereon, without creating a residual heat-affected zone.

A method of activating a surface of a plastics substrate formed from: (a) polyaryletherketone such as polyether ether ketone (PEEK) polyether ketone ketone (PEKK), polyether ketone (PEK); polyether ether ketone ketone (PEEKK); or polyether ketone ether ketone ketone (PEKEKK); (b) a polymer containing a phenyl group directly attached to a carbonyl group, for example polybutadiene terephthalate (PBT) optionally wherein the carbonyl group is part of an amide group, such as polyarylamide (PARA); (c) polyphenylene sulfide (PPS); or (d) polyetherimide (PEI); for subsequent bonding, the method comprising the step of exposing the surface to actinic radiation wherein the actinic radiation: includes radiation with wavelength in the range from about 10 nm to about 1000 nm; the energy of the actinic radiation to which the surface is exposed is in the range from about 0.5 J/cm.sup.2 to about 300 J/cm.sup.2. Hard to bond substrates are then more easily subsequently bonded for example using acrylic, epoxy or anaerobic adhesive.

Aspects of the disclosure relate to manufacturing a balloon envelope for use in a stratospheric balloon system. For instance, a stream of polyethylene mixture us extruded through an extruder in order to orient molecules of polymer chains of polyethylene and to provide an oriented film. The oriented film is passed through an electron beam and thereby crosslinking the polymer chains to provide a cross-linked film. The cross-linked film is heat sealed to form the balloon envelope.

A three-dimensional structured multi-level interlocking structure and a preparation method thereof, the multi-level interlocking structure comprises: a first interlocking structure comprising a first bonding component, first bonding troughs and first macrostmctures alternately positioned on the surface of the first bonding component, and a second interlocking structure comprising a second bonding component, second bonding troughs and second macrostmctures alternately positioned on the surface of the second bonding component, the first macrostructures are aligned with the second bonding trough, and the second macrostmctures are aligned with the first bonding trough; and the first macrostructure has a first end away from the first bonding component and the second macrostructure has a first end away from the second bonding component, the first ends of the first macrostructure and the second macrostructure comprise a top plane, the first end of the first macrostructure extends past the top plane of the second macrostructure, or the first end of the second macrostructure extends past the top plane of the first macrostructure. With the structure applied, the bonding effect is improved and the bonding strength is reinforced, so that the mechanical strength of interlock between the structures is reinforced.

The present invention relates to a plasma generating apparatus for a secondary battery. The plasma generating apparatus for the secondary battery comprises a roller part comprising a transfer roller that transfers a separator and a metal member built in the transfer roller, and a plasma generating part comprising a main body spaced apart from the transfer roller and a plurality of electrode members disposed on positions that are spaced apart from each other in a direction of both ends of the main body and partially generating a plasma between the metal member and the main body to form a patterned bonding layer on a surface of the separator, wherein the plurality of electrode members are detachably coupled to the main body to adjust a number of the electrode members coupled to the main body based on a size of the separator.

This disclosure is directed to methods directly adhering epoxy-based, and other thermosetting surfacing films to solid thermoplastic surfaces and the structures derived or derivable from these methods. In some embodiments, the disclosure is also directed to composite structures comprising a thermoplastic substrate directly bonded to a thermoset(ting) surfacing film; wherein the direct bonding defines an interface between a thermoplastic surface of the thermoplastic substrate and a first surface of the thermoset(ting) surfacing film.