A method of manufacturing a physical unclonable function is disclosed. A highly random distribution of magnetic particles within a thermoplastic polymer is created by magnetizing magnetizable particles in solid pellet feed material before feeding the solid pellets into an injection molding machine. Other devices and processes are disclosed.

A physical unclonable function is disclosed. A highly random distribution of magnetic particles within a thermoplastic polymer is created by magnetizing magnetizable particles in solid pellet feed material before feeding the solid pellets into an injection molding machine. Other devices and processes are disclosed.

An irrigation tube having outlets extending along the length of the tube in a spaced relationship and finely-divided silica or iron oxide particles dispersed in the tube thereby increasing a surface hardness of the tube to deter rodent, worm or insect damage, the silica particles further can include an odor repellant located within the particles.

A method for producing a film including a non-magnetic matrix and a plurality of three-dimensional magnetic microstructures arranged within the matrix according to a predetermined pattern. The method includes providing a master substrate with a magnetically structured face formed from a plurality of magnetic field micro-sources, having a magnetic field gradient of between 10.sup.2 and 10.sup.6 T/m. The method also includes adding magnetic microparticles or nanoparticles to the magnetically structured face of the master substrate, the particles agglomerating into three-dimensional microstructures arranged under an effect of an attractive magnetophoretic force exerted by the magnetic field gradient on the surface of the master substrate. The method further includes depositing, on the magnetically structured face of the master substrate, a matrix made from a non-magnetic material, in such a way as to enclose the arranged microstructures and to form the film and peeling the film from the master substrate.

A method for fused filament fabrication of a thermoplastic part includes: mixing an additive material that is electrically conductive with a thermoplastic material; forming a filament made of materials that include the thermoplastic material mixed with the additive material: passing the filament through an alternating magnetic field such that the additive material is heated by the alternating magnetic field and thus heats the thermoplastic material of the filament; and depositing the materials of the filament on a previously deposited layer of the part to form a newly deposited layer of the part. The thermoplastic material in the newly deposited layer is sufficiently heated such that the thermoplastic material of the newly deposited layer fuses with the thermoplastic material of the previously deposited layer. The method may include: extruding the materials of the filament through a nozzle; and continuing to deposit the materials of the filament until the part is manufactured.

A filament suitable for use with a fused filament fabrication process includes an elongated body. The elongated body defines and extends along a central longitudinal axis of the elongated body. The filament includes at least one continuous reinforcing strand, which is encapsulated within the elongated body. The continuous reinforcing strand extends uninterrupted between a first end and a second end of the elongated body, along the central longitudinal axis. The elongated body includes a ferromagnetic sensitive element that is capable of inductively heating the elongated body. The ferromagnetic sensitive element may include iron particles mixed with the polymer forming the elongated body, or may be formed by the continuous reinforcing strand including a ferromagnetic sensitive material.

A method and an apparatus for producing a radially aligned magnetorheological elastomer molded body containing a matrix resin and a magnetic filler are provided. The method includes the following: placing a permanent magnet 11 in at least one position selected from positions that are spaced from a metal mold 14a having a cavity 14b and located above and below the center of the metal mold 14a; providing a closed magnetic circuit that allows a magnetic flux 19a generated by the permanent magnet 11 to pass through the metal mold 14a from a side thereof, filling the cavity 14b with a composition containing the matrix resin and the magnetic filler; and molding the composition while the magnetic filler is radially aligned. With this configuration, the elastomer material is molded while the magnetic filler is radially aligned by using the permanent magnet.

A device and method for processing a 3D polymer structure with a paramagnetic substance distributed homogeneously in the material of the 3D polymer structure is disclosed. A magnetic field generator generates a static magnetic field in a working zone of the device. Gradient coils for generating magnetic gradient fields in at least all three spatial directions x, y, z, where the paramagnetic substance can be spatially encoded in a defined voxel V of the 3D polymer structure. An RF field generator irradiates RF radiation into the working zone. A control unit controls the RF field generator in such a way that the spatially encoded paramagnetic substance in the voxel V can be excited by a field frequency of the RF radiation which is tuned to the paramagnetic substance, in order to destroy or decompose the 3D polymer structure solely in the defined voxel V.

The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.

A coil component includes a magnetic portion that includes metal particles and a resin material, a coil conductor embedded in the magnetic portion and having a core portion, and outer electrodes electrically connected to the coil conductor. The magnetic portion includes an outer coating and a magnetic base having a protrusion portion. The protrusion portion is inserted into the core portion. The filling factor of the metal particles in the magnetic base is higher than the filling factor of the metal particles in the outer coating.