2201 results about "Co extrusion" patented technology

Medical electrical leads for sensing or electrical stimulation of body organs or tissues, particularly implantable cardiac leads for delivering pacing pulses and cardioversion / defibrillation shocks, and / or sensing the cardiac electrogram (EGM) or other physiologic data and their methods of fabrication are disclosed. A lead body sheath is co-extruded in a co-extrusion process using bio-compatible, electrically insulating, materials of differing durometers in differing axial sections thereof, resulting in a unitary lead body sheath having differing stiffness sections including axial segments or webs or lumen encircling rings or other structures in its cross-section. The lead body sheath is co-extruded to have an outer surface adapted to be exposed to the environment or to be enclosed within an outer sheath and to have a plurality of lead conductor lumens for receiving and enclosing a like plurality of lead conductors of the same or differing types. The lead body sheath can be co-extruded of a plurality of sheath segments containing a lead conductor lumen and formed of a first durometer material or of differing durometer materials. A web of a further durometer material can be co-extruded extending between the adjoining boundaries of the axial sheath segments and bonding the adjacent segments together. The lead body sheath can be tailored to exhibit differing bending stiffnesses away from the lead body sheath axis in selected polar directions around the 360° circumference of the sheath body.

Medical electrical leads for sensing or electrical stimulation of body organs or tissues, particularly implantable cardiac leads for delivering pacing pulses and cardioversion / defibrillation shocks, and / or sensing the cardiac electrogram (EGM) or other physiologic data and their methods of fabrication are disclosed. A lead body sheath is co-extruded in a co-extrusion process using bio-compatible, electrically insulating, materials of differing durometers in differing axial sections thereof, resulting in a unitary lead body sheath having differing stiffness sections including axial segments or webs or lumen encircling rings or other structures in its cross-section. The lead body sheath is co-extruded to have an outer surface adapted to be exposed to the environment or to be enclosed within an outer sheath and to have a plurality of lead conductor lumens for receiving and enclosing a like plurality of lead conductors of the same or differing types. The lead body sheath can be co-extruded of a plurality of sheath segments containing a lead conductor lumen and formed of a first durometer material or of differing durometer materials. A web of a further durometer material can be co-extruded extending between the adjoining boundaries of the axial sheath segments and bonding the adjacent segments together. The lead body sheath can be tailored to exhibit differing bending stiffnesses away from the lead body sheath axis in selected polar directions around 360° circumference of the sheath body.

A process for continuous composite coextrusion comprising: (a) forming first a material-laden composition comprising a thermoplastic polymer and at least about 40 volume % of a ceramic or metallic particulate in a manner such that the composition has a substantially cylindrical geometry and thus can be used as a substantially cylindrical feed rod; (b) forming a hole down the symmetrical axis of the feed rod; (c) inserting the start of a continuous spool of ceramic fiber, metal fiber or carbon fiber through the hole in the feed rod; (d) extruding the feed rod and spool simultaneously to form a continuous filament consisting of a green matrix material completely surrounding a dense fiber reinforcement and said filament having an average diameter that is less than the average diameter of the feed rod; and (e) depositing the continuous filament into a desired architecture which preferably is determined from specific loading conditions of the desired object and CAD design of the object to provide a green fiber reinforced composite object.

The invention provides a polymer back panel of a solar battery assembly. The polymer back panel comprises a base film layer, binding layers on both sides of the base film layer, a fourth thin film layer and a fifth thin film layer on the other two sides of the binding layers, wherein the base film layers contain at least one of the following components: polyamide polymers, polypropylene and acrylic polymers, polyethylene and ethylene polymers, polyvinylidene chloride, styrene polymers, ABS (acrylonitrile butadiene styrene) resins, liquid crystal polymers, acrylic acid polymers, polyphenyl ether, polycarbonate and polymer alloy of polycarbonate and poly(C2-6 alkal terephthalate). In addition, the invention also provides a manufacture method of the back panel. By adopting a thin film structure made of one or more of the above polymers to substitute for the conventional PET (polyethylene terephthalate) layer, the polymer back panel has excellent processing formation performance, material mechanical performance, barrier performance and anti-aging performance; and a back panel laminated film can be prepared by molten co-extrusion or extrusion composite process, with the advantages of significantly improved bonding strength between the films and simplified production process.

A co-extrusion head for forming high-aspect ratio gridline structures in a micro extrusion apparatus includes multiple sheets (e.g., metal plates) that are machined and assembled to define three-part fluidic channels having associated outlet orifice disposed along an edge surface of the head. Reference surfaces are also etched in the sheets and are aligned in a straight line that intersects output junctions of the three-channel cavities. After assembly (e.g., using high pressure bonding techniques), each reference surface is located inside a notch defined in the edge surface. The edge surface of the co-extrusion head is then trimmed (e.g., machined by wire EDM) using the reference surfaces as a precise guide, thereby producing uniform length outlet orifices with uniform flow impedance.

A barrier composition which is injection mouldable and able to be made into a transparent film or incorporated (by co-extrusion and / or lamination) into multi-layer film products, the composition on dry basis: a) from 45 to 90% by weight of a starch and / or a modified starch selected from starches modified by reaction with a hydroxyl alkyl group, an acetate or a dicarboxylic acid anhydride or a grafting polymer; b) from 4 to 12% by weight of a water soluble polymer selected from polyvinyl alcohol, polyvinylacetate, and copolymers of ethylene and vinylalcohol which have a melting point compatible with the molten state of the starch components c) from 5 to 45% by weight of a non-crystallising mixture of sorbitol and at least one other plasticizer selected from glycerol, maltitol, xylitol, mannitol, glycerol trioleate, epoxidised linseed or soybean oil, tributyl citrate, acetyl tri-ethyl citrate, glyceryl triacetate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate; polyethylene oxide or polyethylene glycol; d) from 0.3 to 2.5% by weight of a C12-22 fatty acid or salt; e) from 0.25% to 3% of an emulsifier system having a hydrophilic lipophilic balance value between 2 and 10. The barrier film may be co-injection moulded with polyethylene terephthalate (PET) or polylactic acid (PLA) for blow moulding into beverage bottles, with polyethylene (PE) or polypropylene (PP) or biodegradable polymers for high gas-barrier containers or closures, or may be co-extruded with polyethylene, polypropylene or polylactic acid for thin film packaging applications or for blow-moulded containers.

The invention belongs to the technical field of a solid-state lithium battery, and particularly discloses a hybrid solid-liquid electrolyte lithium storage battery. The lithium storage battery comprises a positive electrode plate, a negative electrode plate and a composite solid-state electrolyte piece, wherein the composite solid-state electrolyte piece is arranged between the positive electrodeplate and the negative electrode plate and comprises a solid-state electrolyte core layer and buffer glue layers, the buffer glue layers are arranged at two sides of the solid-state electrolyte core layer, the solid-state electrolyte core layer is formed by mainly mixing core layer inorganic solid-state electrolyte, an electrolyte polymer and an electrolyte additive, and each buffer glue layer isformed by mainly mixing a buffer glue layer inorganic solid-state electrolyte, a buffer glue layer lithium salt and a buffer glue layer additive. During fabrication of the lithium storage battery, a co-extrusion technology and a rolling technology are combined, primary processing and formation are achieved, the lithium storage battery has the characteristics of high production efficiency and is simple and convenient to operate, and the fabricated lithium storage battery has relatively high electric cycle property and safety.