摘要:
A method of producing a fibre reinforced structure by melt impregnation of continuous fibres with a thermoformable polymer melt comprising pre-wetting the filaments of the fibres with a composition containing a melt plasticiser forthethermoformable polymer, priorto introducing the pre-wetted fibres into the melt, optionally removing the plasticiser when the composition contains a polymer miscible with plasticiserto leave polymer coated filaments and introducing the pre-wetted filaments into a polymer melt, optionally a polymer melt containing a melt plasticiser for the melt and preferably removing the plasticiser from the composition by volatilisation. The pre-wetted polymer coated filaments are useful materials as reinforcing fibres for use in processes other than direct melt impregnation. They can be used in the process known as film stacking impregnation or in processes involving initial impregnation using particulate polymers or alternatively in conventional extrusion compounding.
摘要:
A wide variety of chemical processes using thin films of reactants are carried out on the surface of a body (1) rotating at high speed and the products are readily isolated (for example as fine particles of fibres) by using centrifugal force to fling the products from the rim (9) of the body.
摘要:
A method of producing a fibre reinforced structure by melt impregnation of continuous fibres with a thermoformable polymer melt comprising pre-wetting the filaments of the fibres with a composition containing a melt plasticiser forthethermoformable polymer, priorto introducing the pre-wetted fibres into the melt, optionally removing the plasticiser when the composition contains a polymer miscible with plasticiserto leave polymer coated filaments and introducing the pre-wetted filaments into a polymer melt, optionally a polymer melt containing a melt plasticiser for the melt and preferably removing the plasticiser from the composition by volatilisation. The pre-wetted polymer coated filaments are useful materials as reinforcing fibres for use in processes other than direct melt impregnation. They can be used in the process known as film stacking impregnation or in processes involving initial impregnation using particulate polymers or alternatively in conventional extrusion compounding.
摘要:
A wide variety of chemical processes using thin films of reactants are carried out on an internal cylindrical surface of a vessel (1) rotating at high speed and the products discharged from the surface after the reaction has occurred preferably by using the centrifugal force of the rotation.
摘要:
A reactant medium is transported across the surface of a body (2) rotating at high speed and discharged therefrom by centrifugal force. A chemical reaction is caused to occur in the medium after the said discharge whilst the reactant medium is still connected to the surface of the body.