A system has a first fluid dispenser containing a biocompatible polymer, a second fluid dispenser containing a biocompatible curing agent selected to form a highly viscous mixture with the biocompatible polymer, a pair of diverging surfaces having a contact point, the first fluid dispenser and the second fluid dispenser positioned to dispense a first fluid and a second fluid at the contact point, and an actuator connected to the first fluid dispenser, the second fluid dispenser and the pair of diverging surfaces, the actuator configured to cause the first fluid dispenser and the second fluid dispenser to dispense the fluids at the contact point, and to cause the diverging surfaces to move through the contact point and then diverge, causing the mixture to form filaments until the filaments break up to form a spray. A method of forming a spray includes dispensing a biocompatible polymer solution and a curing agent onto a pair of diverging surfaces to form a mixture, moving the two diverging surfaces counter to each other to cause the mixture to form filaments between the two diverging surfaces as the diverging surfaces move away from each other, moving the two diverging surfaces further counter to each other to cause the filaments burst into droplets, and directing the droplets onto a surface. A composition of matter comprising a biocompatible polymer and a biocompatible curing agent.

Systems for manufacturing bulked continuous filament having tonal coloring from PET comprise, in various embodiments: (1) an extruder; (2) a static mixing assembly coupled to the extruder comprising: (a) a housing, and (b) one or more individual static mixing elements disposed within the housing; (3) a plurality of colorant ports along a length of the static mixing assembly such that each of the plurality of colorant ports is configured to provide colorant to a polymer stream at a different location along the length of the static mixing assembly; and (4) one or more spinning machines positioned downstream of the static mixing assembly and coupled to the static mixing assembly to receive the colored polymer stream. The spinning machine(s) may be configured to form the colored polymer stream into bulked continuous carpet filament having a tonal color effect.

A method for producing a polycondensate melt from a primary material and a secondary material from materials of substantially the same type is provided. A first partial melt stream of the primary material and a second partial melt stream of the secondary material are provided, and a measured value of the intrinsic viscosity of both partial melt streams is determined, and a difference value is calculated from the measured values. Based on the difference value, the intrinsic viscosity of the second partial melt stream is increased, reduced or maintained unchangedly by using a first melt treatment device. Subsequently, the two partial melt streams are combined into a common melt stream.

A method and device for mixing plastic from liquid components in a mixer (8) and conveying it through a line (10) into a mould (12), in particular for vacuum infusion, characterised in that the components are each pumped by means of a pump (24) from their own respective component container (22) into a mixer (8) and are mixed therein, that these volume flows are controlled by a controller (26) in such a manner that they supply the components to the mixer (8) in a specific ratio, that the pressure loss in the line (10), between a pressure sensor in one of the component supply lines (32) leading to the mixer (8) and the mould (12), is determined, and that the pressure is measured by the pressure sensor and supplied to a controller (26) which, taking into consideration the determined pressure loss, controls the volume flows such that the pumps (24) supply the components to the mixer (8) at a pressure that is greater than the ambient pressure or than another specific pressure that should not be exceeded in the mould (12) by at most the pressure loss.

A method and device for mixing plastic from liquid components in a mixer (8) and conveying it through a line (10) into a mould (12), in particular for vacuum infusion, characterised in that the components are each pumped by means of a pump (24) from their own respective component container (22) into a mixer (8) and are mixed therein, that these volume flows are controlled by a controller (26) in such a manner that they supply the components to the mixer (8) in a specific ratio, that the pressure loss in the line (10), between a pressure sensor in one of the component supply lines (32) leading to the mixer (8) and the mould (12), is determined, and that the pressure is measured by the pressure sensor and supplied to a controller (26) which, taking into consideration the determined pressure loss, controls the volume flows such that the pumps (24) supply the components to the mixer (8) at a pressure that is greater than the ambient pressure or than another specific pressure that should not be exceeded in the mould (12) by at most the pressure loss.

A multi-component fluid delivery system includes a heater system. The heater system includes an improved fluid preheating system based on a high conductivity fluid heat exchange manifold that is coupled to external heater elements (e.g., powered via electricity). These techniques can provide more surface area for heating fluid and is external to the fluid passages, making service or replacement much easier. These techniques can utilize etched foil or wire wound heater elements that operate at a lower internal temperature than cartridge heaters, and thus can be inherently more reliable.

A production method for a low molecular weight polymer suitable for a melt-blown non-woven fabric and a production device for melt-blown non-woven fabric, with which a high molecular weight polymer can be reduced in molecular weight by applying a shear force to the high molecular weight polymer without adding an additive. The low molecular weight polymer and the melt-blown non-woven fabric are produced using a continuous high shearing device that applies a shear force to the high molecular weight polymer serving as a raw material by rotation of a screw body to reduce the molecular weight of the high molecular weight polymer so as to obtain a low molecular weight polymer, and cools the low molecular weight polymer by passing the low molecular weight polymer through a passage arranged in the axial direction inside the screw body.

A method includes feeding a heated polymer additive at a first temperature into a continuous mixer at a first feed rate. The method includes feeding a heated abrasive solid material at a second temperature into the continuous mixer at a second feed rate. The heated abrasive solid material and the heated polymer additive are mixed in the continuous mixer to form a first mixture.

In a method producing a molded article of a composite resin containing base resin and fibers, the composite resin containing a fibrous filler in the base resin and the fibrous filler including natural fibers with a fibrillated part on each end of the fibrous filler in a fiber length direction, the base resin and the fibrous filler are charged into a melt-kneading device. The base resin is melted and the molten base resin and the fibrous filler are kneaded in the melt-kneading device, thereby fibrillating only the ends of the fibrous filler. The obtained composite resin is discharged from the melt-kneading device and formed into a pellet shape, with the molded article of the composite resin produced by molding the pellets.

Injector (14) for injecting a liquid formulation into a molten polymer includes outlet (21) at one end and, at its other end, is arranged to be connected to upstream conduit (25) via a coupling housing (26) so that liquid formulation can pass from conduit into the injector, and further includes an elongate conduit (27) in which an elongate pin is slideably arranged being capable of expelling all liquid formulation from conduit. To address the risk the outlet could become blocked in use, whilst avoiding the need to depressurize and/or stop the flow or polymer in extruder (19), the injection apparatus includes a spool (34) which is rotatably mounted within wall (35) of the extruder and is arranged to be rotated about an axis which extends substantially perpendicularly to the elongate extent of the extruder through which a polymer stream (18) flows. The spool may be moved between a first configuration and a second configuration wherein a flow path is interrupted, but wherein molten polymer continues to flow in said polymer flow conduit.