Abstract: The invention relates to a prepreg comprising a structural layer of conductive fibres comprising thermosetting resin in the interstices, and a first outer layer of resin comprising thermosetting resin, and comprising a population of conductive free filaments located at the interface between the structural layer and the outer resin layer which, when cured under elevated temperature, produces a cured composite material comprising a cured structural layer of packed conductive fibres and a first outer layer of cured resin, the outer layer of cured resin, comprising a proportion of the population of conductive free filaments dispersed therein, and to a process for manufacturing prepregs wherein the electrically conductive fibres pass a fibre disrupting means to cause a proportion of the fibres on an external face of the sheet to become free filaments.

Abstract: A method of controlling a process for the manufacture of a multicomponent sheet material having a desired pre-determined parameter comprising applying electromagnetic energy to interact with the sheet material whereby the interaction modifies the applied energy, detecting the modified energy, comparing the modified energy or data derived from it with data relating to the pre-determined parameter and modifying at least one step of the process whereby the data relating to the modified energy is modified towards the data relating to the pre-determined parameter.

Abstract: A strip of curable prepreg comprising unidirectional fibers aligned with the length of the strip, the fibers being at least partially impregnated with curable thermosetting resin and comprising a flexible polymeric sheet on an outer face of the strip, wherein the strip has a substantially rectangular cross-section defining a width and a thickness of the strip.

Abstract: A method of controlling a process for the manufacture of a multicomponent sheet material having a desired pre-determined parameter comprising applying electromagnetic energy to interact with the sheet material whereby the interaction modifies the applied energy, detecting the modified energy, comparing the modified energy or data derived from it with data relating to the pre-determined parameter and modifying at least one step of the process whereby the data relating to the modified energy is modified towards the data relating to the predetermined parameter.

Abstract: The invention relates to a prepreg comprising a structural layer of conductive fibres comprising thermosetting resin in the interstices, and a first outer layer of resin comprising thermosetting resin, and comprising a population of conductive free filaments located at the interface between the structural layer and the outer resin layer which, when cured under elevated temperature, produces a cured composite material comprising a cured structural layer of packed conductive fibres and a first outer layer of cured resin, the outer layer of cured resin, comprising a proportion of the population of conductive free filaments dispersed therein, and to a process for manufacturing prepregs wherein the electrically conductive fibres pass a fibre disrupting means to cause a proportion of the fibres on an external face of the sheet to become free filaments.

Abstract: The invention relates to a prepreg comprising a structural layer of conductive fibers comprising thermosetting resin in the interstices, and a first outer layer of resin comprising thermosetting resin, and comprising a population of conductive free filaments located at the interface between the structural layer and the outer resin layer which, when cured under elevated temperature, produces a cured composite material comprising a cured structural layer of packed conductive fibers and a first outer layer of cured resin, the outer layer of cured resin, comprising a proportion of the population of conductive free filaments dispersed therein, and to a process for manufacturing prepregs wherein the electrically conductive fibers pass a fiber disrupting means to cause a proportion of the fibers on an external face of the sheet to become free filaments.

Abstract: A laminate or structure which comprises a conductive layer, a fibrous layer and a support layer adhering to an outer face of the laminate or structure, the support layer preventing distortion of the conductive layer during slitting of the laminate or structure to form a conductive strip.

Abstract: A curable flexible electromagnetic hazard resistance laminate, comprising a layer of electrically conductive metal material and thermosetting resin, wherein an external face of the laminate comprises a releasable backing sheet in contact with resin, and the laminate further comprises a substantially non-reshapable sheet of solid material.

Abstract: A curable flexible electromagnetic hazard resistance laminate, comprising a layer of electrically conductive metal material and thermosetting resin, wherein a first external face of the laminate comprises a releasable backing sheet in contact with resin, and a second external face of the laminate comprises resin, wherein the second external face has greater adhesiveness than the first external face with the backing sheet removed.

Abstract: A strip of curable prepreg comprising unidirectional fibres aligned with the length of the strip, the fibres being at least partially impregnated with curable thermosetting resin and comprising a flexible polymeric sheet on an outer face of the strip, wherein the strip has a substantially rectangular cross-section defining a width and a thickness of the strip.

Abstract: A sheet-like composite material comprising a structural layer and curable thermosetting resin, and comprising a fibre-reinforced backing paper on one of its external faces.

Abstract: A strip of curable prepreg comprising unidirectional fibres aligned with the length of the strip, the fibres being at least partially impregnated with curable thermosetting resin and comprising a flexible polymeric sheet on an outer face of the strip, wherein the strip has a substantially rectangular cross-section defining a width and a thickness of the strip.

Abstract: The invention relates to a prepreg comprising a structural layer of conductive fibres comprising thermosetting resin in the interstices, and a first outer layer of resin comprising thermosetting resin, and comprising a population of conductive free filaments located at the interface between the structural layer and the outer resin layer which, when cured under elevated temperature, produces a cured composite material comprising a cured structural layer of packed conductive fibres and a first outer layer of cured resin, the outer layer of cured resin, comprising a proportion of the population of conductive free filaments dispersed therein, and to a process for manufacturing prepregs wherein the electrically conductive fibres pass a fibre disrupting means to cause a proportion of the fibres on an external face of the sheet to become free filaments.

Abstract: A curable flexible electromagnetic hazard resistance laminate, comprising a layer of electrically conductive metal material and thermosetting resin, wherein an external face of the laminate comprises a releasable backing sheet in contact with resin, and the laminate further comprises a substantially non-reshapable sheet of solid material.

Abstract: A curable flexible electromagnetic hazard resistance laminate, comprising a layer of electrically conductive metal material and thermosetting resin, wherein a first external face of the laminate comprises a releasable backing sheet in contact with resin, and a second external face of the laminate comprises resin, wherein the second external face has greater adhesiveness than the first external face with the backing sheet removed.