Abstract:
A method of joining a thermoplastic material to a thermoset material, and a resultant thermoplastic-thermoset composite formed from such method are provided. At least one of the thermoplastic material and the thermoset material includes particles that melt when the thermoplastic material and the thermoset material are heated during the joining operation. The particles further produce a solid bond between the materials after the particles have solidified in the course of cooling after the joining operation.
Abstract:
A blade for a wind turbine includes a first structural component; a second structural component; and at least one conductive bond for joining the first and second structural components.
Abstract:
A method, a system and a product made therefrom including the steps of providing electrically non-conductive pieces or fragments, causing at least a portion of the electrically non-conductive pieces or fragments to become temporarily electrically conductive, combining adhesive which sets when sufficient heat is applied thereto with the temporarily electrically conductive pieces or fragments, and applying voltage across the temporarily electrically conductive pieces or fragments and adhesive combination so as to produce an electric current through the temporarily electrically conductive pieces or fragments which, in turn, generates heat within the temporarily electrically conductive pieces or fragments and adhesive combination.
Abstract:
A film of an oleaginous substance is interposed between the surfaces of plastic elements to be joined by a thermal bond. The heat necessary for bonding is obtained by the incorporation of heat generating particles in the bond region, either in the plastic element or in the film. The particles are indirectly heatable by a high frequency alternating magnetic field or other suitable field. This provides a rapid and efficient heating of the surfaces to the bonding temperature, with the oleaginous substance enhancing the bonding action and the properties of the bond.
Abstract:
Structures and methods for providing a liquid adhesive between substrates of a composite structure are described. Methods include providing a liquid adhesive having a thread disposed therein between two substrates of a composite structure. In some embodiments, the thread has a fixed diameter which acts to provide a consistent gap between the two substrates. In some embodiments, the thread is configured to be activated during the assembly process to facilitate curing of the liquid adhesive. In some embodiments the thread is configured to be activated after the composite structure is formed to facilitate separation of the two substrates and disassembly of the composite structure. The thread can be made of a conductive or non-conductive material. In some embodiments, the thread is activated by passing a voltage through the thread to heat the thread. In some embodiments, the thread is activated by passing ultraviolet light through the thread.
Abstract:
An exemplary method for manufacturing and reinforcing a corner in an object made from a sandwich structure, having a thermoplastic core layer (18), which is arranged between two cover layers (16), at least one of which is a plastic cover layer, which method includes the steps of: producing an object including a corner between two object parts; positioning a thermoplastic core part (24) and an additional fibre-reinforced thermoplastic layer (26) in the corner, which thermoplastic core part has a shape adapted to the corner, in such a manner that the additional fibre-reinforced thermoplastic layer (26) substantially covers the exposed surface of the core part (24); and connecting a cover layer (16) of the sandwich structure to the additional fibre-reinforced thermoplastic layer (26).
Abstract:
Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy.
Abstract:
1,204,506. Seaming non-metallic sheet material; laminating. W. C. HELLER. 15 Aug., 1967 [15 Aug., 1966], No. 37462/67. Headings B5K and B5N. Predetermined interfacial areas of adjacent heat sealable surfaces of a plurality of sheets are joined by applying a susceptor material comprising electrically non-conductive oxide particles to at least one of the sheets at a location within each of the predetermined areas to be joined but spaced from the adjacent surfaces to be sealed and thereafter inducing heat in the susceptor material to raise the temperature of the predetermined areas sufficiently to seal the adjoining surfaces of the sheets within these areas. The invention is applicable to the sealing or laminating of sheets forming bags, carton liners, bag closures, carton overwraps and coated folding cartons. In one embodiment, Figs. 1 (not shown), and 2, a multi-layered sheet containing susceptor material is prepared by magnetic hysteresis heating by feeding a paperboard ply (32), Fig. 1, and a thermoplastic film (36) with a perforated susceptor material (34), e.g. electrically non-conductive ferromagnetic oxide particles in a polyethylene or nylon carrier, sandwiched therebetween through a coil (41) and then between pressure rolls (33). This material 32a, 34a, 36a, Fig. 6, is fed with a paperboard ply 31 facing the thermoplastic layer 36a through a coil 41a and then between pressure rolls 46. The susceptor 34, 34a and the thermoplastic film 36, 36a need not be provided in continuous layer but may be arranged in an intermittent pattern according to the desired shape of the bond. The embodiment of Figs. 1 and 2 may be modified to be applied to an intermittent, instead of a continuous, process. In another embodiment, Fig. 8, heat sealing is avoided between two layers of a triple-folded assembly of paper-board 71 coated on both sides with polyethylene 73 and accomplished between other layers. The folded layers with a susceptor material 74 positioned at the inner fold are held in place by a coil 76. Pressure is applied at 77. The material 74 may be prepared by milling iron oxide particles into nylon which is not readily heat sealable to polyethylene. After sealing, the material 74 may be removed for re-use. This embodiment is applicable to sealing milk cartons. In Fig. 9, two plastics films 83 are heat sealed to a wall 82 of a heavier gauge plastics film bag at areas 85 using susceptor layers 87. In Fig. 10, a non-sealing non-susoeptor layer 93 is placed in a fold of a heat sealable material 91. Upon heating the susceptors 87a, heat seals 85a are formed. Instead of using magnetic hysteresis heating, heat may be induced in the susceptor by an ultrasonic energy beam, X-rays, a laser beam, an ion beam, an electron beam or nuclear radiation.
Abstract:
An exemplary method for manufacturing and reinforcing a corner in an object made from a sandwich structure, having a thermoplastic core layer (18), which is arranged between two cover layers (16), at least one of which is a plastic cover layer, which method includes the steps of: producing an object including a corner between two object parts; positioning a thermoplastic core part (24) and an additional fiber-reinforced thermoplastic layer (26) in the corner, which thermoplastic core part has a shape adapted to the corner, in such a manner that the additional fiber-reinforced thermoplastic layer (26) substantially covers the exposed surface of the core part (24); and connecting a cover layer (16) of the sandwich structure to the additional fiber-reinforced thermoplastic layer (26).
Abstract:
A method of forming a fluid ejector includes positioning a fluid ejection module such that it is adjacent to a mounting frame, applying heat to a thermohardening glue that is between the fluid ejection module and the mounting frame, and curing the glue to secure the fluid ejection module to the mounting frame. The heat is applied with a heating element at least partially embedded in the glue.