A flexible pipe body and method of producing a flexible pipe body are disclosed. The method includes providing one or more composite filament (302) as a filament bundle (310); applying a braid element (304) around the filament bundle as a braided bundle (310); helically wrapping the braided bundle (310) around a flexible pipe layer (502); and then curing (510) the one or more composite filament (302).

A carbon fiber bundle forming method, wherein the at least one carbon fiber bundle can be evenly heated since it is heated with microwave in the first and second microwave steps. Besides, the at least one carbon fiber bundle is treated in the laser step, laser can reach into the interior of the at least one carbon fiber bundle to enable the carbonization and graphitization to take place more evenly, then the carbon fiber bundle is treated in the subsequent roughening treatment step, the resin forming step and the semi-cure forming step, so that the interior of the at least one carbon fiber bundle can be heated evenly, which allows the at least one carbon fiber bundle to be carbonized evenly.

A system comprises a delivery guide movable relative to a surface. The delivery guide is configured to deposit a continuous flexible line along a print path that is stationary relative to the surface. The system further comprises a vessel, configured to hold a volume of a liquid photopolymer resin and to apply a quantity of the liquid photopolymer resin to the non-resin component to create the continuous flexible line. The system further comprises a feed mechanism, configured to pull the non-resin component through the vessel and to push the continuous flexible line out of the delivery guide. The system further comprises a source of curing energy. The source is configured to deliver the curing energy at least to a portion of the segment of the continuous flexible line after the segment of the continuous flexible line exits the delivery guide.

A system for additively manufacturing a composite part comprises a delivery guide, movable relative to a surface. The delivery guide is configured to deposit at least a segment of a continuous flexible line along a print path. The continuous flexible line comprises a non-resin component and a thermosetting-resin component. The thermosetting-resin component comprises a first part and a second part. The system further comprises a first resin-part applicator, configured to apply a first quantity of the first part to the non-resin component, and a second resin-part applicator, configured to apply a second quantity of the second part to the first quantity of the first part of a thermosetting resin, applied to the non-resin component. The system also comprises a feed mechanism, configured to pull the non-resin component through the first resin-part applicator and the second resin-part applicator, and to push the continuous flexible line out of the delivery guide.

A method of additively manufacturing a composite part comprises applying a liquid photopolymer resin to a non-resin component to create a continuous flexible line by pulling the non-resin component through a vessel, containing a volume of the liquid photopolymer resin. The continuous flexible line comprises the non-resin component and a photopolymer-resin component that comprises at least some of the liquid photopolymer resin applied to the non-resin component. The method further comprises routing the continuous flexible line into a delivery guide, pushing the continuous flexible line out of the delivery guide, depositing, via the delivery guide, a segment of the continuous flexible line along a print path, and delivering curing energy at least to a portion of the segment of the continuous flexible line.

A method of additively manufacturing a composite part is disclosed. The method comprises pushing a continuous flexible line through a delivery guide. The continuous flexible line comprises a non-resin component and a thermosetting-epoxy-resin component that is partially cured. The method also comprises depositing, via the delivery guide, a segment of the continuous flexible line along a print path. The method further comprises maintaining the thermosetting-epoxy-resin component of at least the continuous flexible line being pushed through the delivery guide below a threshold temperature prior to depositing the segment of the continuous flexible line along the print path.

A method of additively manufacturing a composite part is disclosed. The method comprises depositing a segment of a continuous flexible line along a print path. The continuous flexible line comprises a non-resin component and a thermosetting resin component that is not fully cured. The method further comprises, while advancing the continuous flexible line toward the print path, delivering a predetermined or actively determined amount of curing energy at least to a portion of the segment of the continuous flexible line at a controlled rate after the segment of the continuous flexible line is deposited along the print path to at least partially cure at least the portion of the segment of the continuous flexible line.

Multilayer hose construction and hose formulation provide a surprising combination of physical properties and enhanced performance, more specifically providing improved kink resistance and burst strength. The garden hose comprises an extruded composite tube including core and jacket layers of a polyvinyl chloride (PVC) compound and an intermediate reinforcement layer having interstices through which the core and jacket layers are bonded, the PVC compound comprising: 100 PPH (parts in weight per hundred parts of resin) of PVC resin; and 45-75 PPH of plasticizer. The PVC compound has a K value in a range of 79-85 measured according to standard ISO1628-2 and a specific gravity in a range of 1.17-1.23 measured according to standard ASTM D792. The composite tube has a bend radius of less than 3 inch and the composite tube has a minimum burst pressure of 500 psi measured according to standard ISO 1402:2009.

A method of forming a fiber-reinforced molding compound. The method includes pre-impregnating carbon reinforcing fibers with a polymeric material to form one or more pre-impregnated continuous strands having at least 30% of the fibers protected by the polymeric material. The method further includes storing the one or more pre-impregnated continuous strands in bulk. The method also includes introducing the one or more pre-impregnated continuous strands into an extruder, forming a molding compound from the one or more pre-impregnated continuous strands, dispensing the molding compound from the extruder, and using the molding compound to produce a part.

A method of forming a fiber-reinforced molding compound. The method includes pre-impregnating reinforcing fibers with a polymeric material to form one or more pre-impregnated continuous tapes. The method further includes storing the one or more pre-impregnated continuous tapes in bulk, and introducing the one or more pre-impregnated continuous tapes into an extruder. The method further includes forming a molding compound from the one or more pre-impregnated continuous tapes, dispensing the molding compound from the extruder, and using the molding compound to produce a part.