210 results about "Co extrusion" patented technology

The invention relates to the technical field of high-voltage electrical equipment, and particularly discloses a high-insulating-property thermoplastic sleeve and a method for preparing the same based on a co-extrusion process, the surface of a nonlinear layer is wrapped with an insulating material, so that the corona discharge phenomenon is avoided; and meanwhile, the same thermoplastic material is adopted as the insulating layer (including the first thermoplastic layer and the second thermoplastic layer) material and the base material of the nonlinear layer, so that no obvious interface exists between the insulating layer and the nonlinear layer, charge accumulation is avoided, insulation failure is avoided, the insulation and voltage resistance of the sleeve is improved, and the operation reliability is improved.

A biaxially oriented industrial or household compostable film web having at least three co-extruded layers selected from the group consisting of a facing film layer, a sealant film layer, and a combination of sealant film layers and facing film layers, wherein the sealant film layer and the surface film layer each comprise from 0 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA) and from about 20 wt% to about 100 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers; and a core film layer comprising from about 30 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA), from about 20 wt% to about 40 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers.

The present disclosure relates to a thermoplastic resin composition and an exterior material including the same. The thermoplastic resin composition has low gloss and has mechanical properties and processability equal or superior to those of conventional ASA resins. The thermoplastic resin composition also has improved viscoelastic properties that can lead to excellent processability during the manufacture of a co-extruded product and excellent adhesion within the co-extruded product. The thermoplastic resin composition is also capable of reducing surface defects.

The invention provides an anti-static knitted fabric based on charge gathering and directional guiding, a preparation method of the anti-static knitted fabric and a knitted fabric, and belongs to the technical field of knitted clothes. A first spinning component and a second spinning component are co-extruded through melt spinning to prepare composite fibers with a parallel composite structure, and the composite fibers are subjected to thermal mechanical treatment to obtain the composite yarn; the composite yarn is directionally introduced into a specific area of the fabric in a tuck-float stitch mode through an embedded weaving technology, and latent curl is activated through after-treatment. The moisture absorption expansion of the second spinning component is utilized to drive the composite yarn to macroscopically self-crimp, and the conductive filler inside is physically extruded to construct an efficient conductive skeleton, so that the humidity response adjustment and charge directional dispersion of the anti-static performance are realized, and the problems of fixed conductive state, local static accumulation and poor comfort of the existing fabric are effectively solved; and the safety and wearing experience of the clothes are improved.

The invention discloses an antistatic polyester film capable of phase change temperature regulation and a preparation method thereof, the film provided by the invention has a double-layer structure, the bottom layer is a temperature regulation functional layer doped with a phase change material, and the surface layer is a functional layer doped with carbon black to prevent electrostatic aggregation. According to the antistatic polyester film capable of adjusting the temperature through phase change, the adjusting temperature is 27 DEG C, the phase change enthalpy is 17 j / g, the surface resistivity of the surface layer is 1.1 * 10 < 7 > omega / m < 2 >, and the antistatic polyester film is expected to be applied to the fields of intelligent wearable equipment, medical sensors, electronic packaging materials, supercapacitor protection layers and the like.

The invention discloses a quantum dot diffusion plate and a preparation method thereof, and relates to the technical field of diffusion plate materials. In-mold composite four-layer co-extrusion is carried out on the high-transmittance diffusion layer, the red quantum dot layer, the green quantum dot layer and the high-fog diffusion layer to prepare the quantum dot diffusion plate, and the quantum dot layer added with the green quantum dots and the red quantum dots is used as a middle layer. Red quantum dots and green quantum dots of the quantum dot diffusion plate subjected to in-mold composite four-layer co-extrusion are located among different layers and do not interfere with each other, the red quantum dot layer and the green quantum dot layer are separated, the four-layer extrusion process is carried out, the prepared quantum dot diffusion plate is narrow in emission spectrum wave crest and high in quantum efficiency, meanwhile, the diffusion layer has low water molecule migration rate, and the quantum dot diffusion plate can be used for preparing the quantum dot diffusion plate. Therefore, the quantum dot diffusion plate has good water and oxygen barrier efficiency, and has a good water and oxygen barrier effect while having a diffusion plate function.

The invention discloses a cable with a co-extrusion self-foaming ceramic fireproof layer and a preparation method of the cable, and belongs to the technical field of polyolefin cables. The cable comprises a conductor, an insulating layer and a fireproof layer from inside to outside, comprising the following raw materials: 40-60 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a polyolefin elastomer, 20-30 parts of a ceramic precursor filler, 5-10 parts of a compatilizer, 5-10 parts of a cosolvent, 3-5 parts of a flexibilizer, 2-4 parts of a main foaming agent, 1-2 parts of an auxiliary foaming agent, 1-3 parts of a lubricant and 0.5-1.5 parts of an antioxidant. The compatilizer is siloxane containing sulfydryl and phosphaphenanthrene groups, and the flexibilizer is silane coupling agent modified quartz fibers containing double bonds. In a matrix of the ethylene-vinyl acetate copolymer and the polyolefin elastomer, the compatilizer and the flexibilizer are added, so that the fireproof layer is endowed with better impact resistance and flame retardance.

The invention provides a degradable breathable composite film based on a gradient microporous structure and a preparation method and application thereof, and belongs to the field of protective materials.The preparation method comprises the steps that PLA, PBAT, ADR, CaCO3 and modified master batches are subjected to melt blending in proportion, a three-layer casting film is prepared through three-layer casting film forming equipment, the three-layer casting film is formed through a stretching technology, and a gradient breathable film is obtained; a PLA non-woven fabric is prepared through a melt-blowing or spun-bonding technology; and compounding the gradient breathable film with a PLA non-woven fabric to obtain the degradable breathable composite film based on the gradient microporous structure. The three-layer casting co-extrusion process is adopted, the gradient porosity breathable film and the hydrophilic / hydrophobic design are combined, the comprehensive performance of the protective material is effectively improved, the moisture permeation amount of the material is increased, the hydrostatic pressure of the material is improved, and therefore the barrier property and comfort of the material are enhanced. The blocking layer is made of a porous membrane material formed by stretching PLA and PBAT composite CaCO3, the comfortable layer is made of a PLA spunbond / melt-blown non-woven fabric material, and full degradation of the protective material is achieved.

The invention is directed to a method for the preparation of an energetic material product such as a propellant or explosive charge or grain. The method includes additive manufacturing with co-extrusion of at least two materials to form a multi-layered filament and layer-by-layer deposition of the multi-layered filament. The multi-layered filament has a first material layer and a second material layer and at least one layer includes an energetic material. In another aspect, the invention is directed to an apparatus for use in this method, the apparatus comprising a co-extrusion nozzle.

The invention provides core-skin resin particles and a preparation method thereof, a foam material and a composite foam material. The core-skin resin particles are prepared by adopting a co-extrusion process, and the polymer base material and the conductive filler are selectively distributed in the skin layer and the core part, so that the structural design that a conductive part is separated from an insulating part is realized. In addition, the obtained core-skin resin particles are foamed through a physical foaming process, the purpose of light weight of the material is achieved, and the core part of the obtained foamed bead improves the electromagnetic shielding absorption characteristic of the material. Furthermore, the foamed beads obtained by the invention can be subjected to molding treatment, so that a molded part with a designable shape and insulating and electromagnetic shielding properties can be obtained.

A pile is comprised of a pipe, i.e., a hollow tube or hollow cylinder, with a coextensive internal reinforcement comprised of a plurality of intersecting walls. The pile is comprised of a blend of a thermoplastic and 20 to 50% (pbw) pelletized chopped strand glass fibers. The outer surface includes a co-extruded cap stock that is relatively smooth and exhibits a relatively low coefficient of friction. Internal walls define a central channel useful for water jetting, and peripheral channels useful for electrical, plumbing and mechanical lines. The internal structures exhibit roughness, bumpiness and a relatively high coefficient of friction for an extruded plastic. A groove may be formed in the pile adjacent to an end for resistance to uplift.

The manufacturing process of the conventional tape is complicated, which leads to energy waste and an increase in manufacturing cost.SOLUTION: The present invention discloses an apparatus and a method for manufacturing a tape. The equipment for manufacturing the tape includes a base film forming section, an adhesive film forming section, a co-extrusion section, and a stretching section. The base film-forming portion thermally melts the substrate to form a base film. The adhesive film forming portion thermally melts the adhesive material to form a pressure sensitive adhesive film. The co-extrusion section is respectively connected to the base film forming section and the adhesive film forming section, and the base film and the pressure sensitive adhesive film enter the co-extrusion section to perform a co-extrusion manufacturing process, thereby obtaining a co-extruded film having the base film and the pressure sensitive adhesive film. The stretching section performs a stretching process on the co-extruded film.SELECTED DRAWING: Figure 1

The invention discloses an anisotropic ablation-resistant thermal insulation material, a preparation method and application, and the anisotropic ablation-resistant thermal insulation material is prepared from the following raw material components in parts by weight: 100 parts of matrix rubber, 20-50 parts of ablation-resistant filler, 5-10 parts of organic fiber, 5-10 parts of inorganic fiber and 1-5 parts of vulcanizing aid. The anisotropic ablation-resistant thermal insulation material provided by the invention is better in ablation performance, shorter in preparation period, lower in cost and higher in interface bonding reliability, the oxyacetylene line ablation rate is 0.001-0.005 mm / s, the mass ablation rate is 0.03-0.06 g / s, and when the anisotropic ablation-resistant thermal insulation material is used as an engine shell thermal insulation layer, an engine shell can be effectively protected when an engine works. According to the method, the multi-layer thermal insulation material is prepared through continuous layered co-extrusion, layered lamination, calendaring and shaping, cutting and mold pressing, layered lamination has shearing, stretching and compressing effects on a rubber material, fiber orientation in the rubber material is promoted, and finally, the layers of the prepared anisotropic ablation-resistant thermal insulation material are well attached, so that the thermal insulation performance of the material is improved, and the service life of the material is prolonged. Defects are not easy to form on an interlayer interface.

The invention relates to the technical field of composite material manufacturing, in particular to co-extrusion equipment and method for a weather-proof composite material section, the equipment comprises a pultrusion die, the pultrusion die at least comprises three sections in the direction of an infiltration tank of the pultrusion die, and the temperatures of the three sections are controlled to be 50-100 DEG C, 140-200 DEG C and 160-200 DEG C respectively; wherein a second glue injection port communicated with the infiltration tank is arranged between the third section and the fourth section, the PVDF extruder is communicated with the second glue injection port, the temperature of the PVDF extruder is gradually increased from the far end of the PVDF extruder to the second glue injection port, and the temperature of the second glue injection port is controlled to be 180-200 DEG C. The pultrusion mold of the co-extrusion equipment is subjected to segmented temperature control, resin in a high-temperature viscous flow state and PVDF melt are subjected to mutual diffusion and reaction on a contact interface by means of high temperature and then are gradually cured and formed, the process of coating the PVDF film on the surface layer remarkably improves the weather resistance of the thermosetting composite material, the equipment cost is controllable, the production efficiency is improved, and the production cost is reduced. And the production cost is reduced.

The invention relates to the technical field of polymer composite materials, in particular to a TPE-PP composite material for a folding joint of a pet trolley and a preparation method of the TPE-PP composite material. The problems that an existing joint material is insufficient in fatigue resistance and limited in environmental adaptability are solved. The composite material adopts a three-layer structure: a base layer takes high-crystallinity polypropylene as a matrix, and glass fiber reinforcement and elastomer toughening are assisted, so that high rigidity and high strength are realized; the functional layer is composed of a fatigue-resistant thermoplastic elastomer composite system and contains strengthening components such as nano SiO2 so as to disperse stress and prevent crack propagation; the surface layer is a functional layer and contains polytetrafluoroethylene micro powder to provide self-lubricating property, a silver-loaded zinc zeolite antibacterial agent to endow antibacterial and mildew-proof properties, and an anti-ultraviolet additive to improve weather resistance. The three layers form an interpenetrating network structure through co-extrusion and are crosslinked through electron beam irradiation, so that the interlayer binding force is improved. The material can remarkably prolong the service life of the folding joint of the pet trolley and improve the use safety and environmental adaptability.

The invention discloses a rare earth aluminum alloy cable material, a preparation method and application of the rare earth aluminum alloy cable material to a power transmission line, the cable material comprises, based on the total weight, 0.3-0.6 wt% of Er, 0.1-0.3 wt% of Yb, 0.05-0.15 wt% of Ce, 0.35-0.5 wt% of Mg, 0.2-1.5 wt% of Cu, 0.1-2.5 wt% of nano SiC particles, 0.1-0.3 wt% of graphene and the balance Al and impurities, the cable material is designed by adopting a three-layer gradient structure, the middle layer contains 0.1-0.2 wt% of Er and 0.01-0.2 wt% of graphene, and the core layer contains 0.5-0.6 wt% of Er and less than 0.01 wt% of graphene; during preparation, the composite wire with the thickness ratio of the core layer to the middle layer being 1: 3-3: 1 is formed through argon protection smelting, ultrasonic dispersion of nano-particles and static magnetic field assisted co-extrusion, and the surface roughness is enhanced in combination with micro-arc oxidation (Ra = 0.5-1.5 microns). The cable material is excellent in tensile strength, dynamic fatigue life, electromagnetic shielding performance and corrosion resistance through Er gradient distribution, SiC / graphene coating and multi-scale interface synergistic effect.

A polyolefin bonding adhesive film includes a support base layer and a bonding adhesive layer formed on a side surface of the support base layer by co-extrusion. The support base layer is a polypropylene film. The bonding adhesive layer is formed of a first polyolefin copolymer modified by maleic anhydride. The first polyolefin copolymer is formed by copolymerization of at least two kinds of C2 to C4 olefin molecules, a first graft ratio of the maleic anhydride grafted onto the first polyolefin copolymer is between 0.5% and 5%, and a first melt index of the first polyolefin copolymer is between 3 g / 10 min and 5 g / 10 min.

The invention discloses a preparation method of a corrosion-resistant composite cable conductor, and relates to the technical field of alloy cables, and the preparation method comprises the following steps: carrying out smelting, refining, casting, annealing, extrusion and aging treatment on a high-purity aluminum matrix and an intermediate alloy containing a conductivity improving element to obtain an aluminum alloy conductor mixture; the preparation method comprises the following steps: burdening and mixing reinforced fibers, a polymer matrix, an interface reinforcing agent and a nano filler to prepare a creep-resistant reinforced mixture; the aluminum alloy conductor mixture and the creep-resistant reinforced mixture are subjected to a co-extrusion process to prepare the composite cable; a polymer matrix, an interface reinforcing agent, a functional filler and a plasticizer are blended and mixed, and a corrosion-resistant protective layer is prepared outside the composite cable through surface activation and secondary extrusion processes. Through the composite structure of the creep-resistant reinforcing layer and the aluminum alloy conductor, the creep-resistant capability of the cable is remarkably improved; and the corrosion-resistant protection layer is tightly combined with the composite cable, so that the cable is suitable for a humid or salt-fog environment.

The present disclosure relates to physically crosslinked closed cell continuous multilayer foam structures comprising at least one foamed polypropylene / polyethylene layer having a TPU overlay. A multilayer structure comprising at least one layer of a foam composition and at least one layer of a cover composition may be co-extruded, the co-extruded structure is irradiated with ionizing radiation, and the irradiated structure is continuously foamed.

The invention discloses an ultra-silence HDPE pipe for building drainage and a preparation method thereof.The HDPE pipe is formed by co-extruding and compounding an inner layer, a middle silence layer and an outer layer, and the inner layer and the outer layer are each prepared from HDPE, an antioxidant, a lubricating agent and pigment according to a certain proportion; the middle mute layer is prepared from HDPE (high-density polyethylene), modified mica powder, Expancel pre-expanded microspheres, maleic anhydride grafted polyethylene, an elastomer, a lubricant and an antioxidant according to a certain ratio. The preparation method of the HDPE pipe comprises the following steps: adding the inner-layer mixture into a first extruder for melt extrusion, adding the middle mute layer mixture into a second extruder for melt extrusion, adding the outer-layer mixture into a third extruder for melt extrusion, then carrying out co-extrusion molding through a co-extrusion mold, and then carrying out cooling shaping, thus obtaining the HDPE pipe. The ultra-silence HDPE pipe for building drainage is obtained. The HDPE pipe provided by the invention has good mute performance, high temperature resistance and toughness, and other performances meet the requirements.

The application relates to the technical field of composite films, and particularly discloses an aluminum-plastic composite film and a preparation method thereof. The aluminum-plastic composite film comprises, from outside to inside, an outer barrier layer, a first adhesive layer, a barrier layer, a second adhesive layer, a protective layer and a heat-sealing layer; the protective layer comprises 100 parts of ternary random copolymerized polypropylene, 5-8 parts of a compatilizer, 10-25 parts of modified fillers and 1-5 parts of a nucleating agent; the modified fillers are fluorine-containing micro-powder and silicon powder treated by a silane coupling agent; and the preparation method comprises the following steps: mixing the ternary random copolymerized polypropylene, the compatilizer, the modified fillers and the nucleating agent, and then melt co-extruding to obtain the protective layer; and then, from outside to inside, the outer barrier layer, the first adhesive layer, the barrier layer, the second adhesive layer, the protective layer and the heat-sealing layer are compounded to obtain the aluminum-plastic composite film. The protective layer has good corrosion resistance, the electrolyte permeated by the heat-sealing layer continues to permeate into the second adhesive layer, and the electrolyte resistance of the aluminum-plastic composite film is improved.

Device (10) for co-extruding a multi-layer co-extrusion composite (100), in particular a co-extruded multi-layer film, comprising a. a main channel (20) for producing a main layer (22) of the coextrusion composite (100), b. at least one coextrusion channel (30, 30', 40, 40') for producing at least one coextrusion layer (32, 32', 42, 42') of the coextrusion composite connected with the main layer (22), c. a multitude of actuable adjusting elements (24, 24', 34, 34') for adjusting layer thicknesses or layer thickness profiles of the layers of the coextrusion composite (100), characterized by at least one adjusting device (200) for actuating the adjusting elements (24, 24', 34, 34'), wherein the at least one adjusting device (200) is displaceable in such a way as to be positioned on the adjusting elements (24, 24', 34, 34') so that an actuating device (70) of the adjusting device (200) can be brought into operative contact with each adjusting element (24, 24', 34, 34') for actuating the respective adjusting element (24, 24', 34, 34').

An exemplary three-dimensional (3D) printer deposition tool of the present disclosure comprises a filament feeder mechanism for feeding thermoplastic filament into a print head nozzle; a carbon fiber towpreg feeder mechanism for feeding carbon fiber towpreg into the print head nozzle; a carbon fiber towpreg cutting mechanism; and / or a controller configured to co-extrude continuous carbon fiber towpreg with the thermoplastic filament in a multi-axis path and cut and re-feed the carbon fiber towpreg into the print head nozzle for non-continuous toolpaths.

The invention relates to the technical field of building structure engineering, in particular to an assembly type bamboo-based composite frame beam-column joint based on the co-extrusion technology, a bamboo-based composite stand column and a bamboo-based composite cross beam are connected through a connecting joint, the connecting joint comprises hollow cylindrical steel and two horizontal steel plates, the hollow cylindrical steel is inserted into the bamboo-based composite stand column, and the two horizontal steel plates are connected through the hollow cylindrical steel. The horizontal steel plate comprises a connecting section and an extending section, the connecting section of the horizontal steel plate is welded to the outer side of the hollow cylindrical steel, the extending section of the horizontal steel plate serves as a beam connecting part and is connected with the bamboo-based composite cross beam through a high-strength bolt, and the extending section of the horizontal steel plate covers the outer side of the bamboo-based composite cross beam; the two horizontal steel plates are arranged at intervals and divide the hollow cylindrical steel into a middle column section and two end column sections, the middle column section of the hollow cylindrical steel is bonded with the bamboo-based composite stand column through glue, and the end column sections of the hollow cylindrical steel are connected with the bamboo-based composite stand column through high-strength bolts. According to the invention, the steel consumption and the material cost can be reduced while the use space of a building is saved.

The present invention relates to the technical field of plastic molding, and discloses a gas-assisted co-extrusion multi-component plastic rod forming system, which includes a gas-assisted part. The gas-assisted part is located at a position of the extruder body close to the discharge port, and the gas-assisted part includes fixing plates evenly embedded in the inner wall of the extruder body. The composite pipe of the invention adopts a design in which an L pipe, a middle pipe and a nozzle are sequentially arranged from top to bottom. When the internal pressure changes, the bending structure of the composite pipe plays a buffering role. When the gas flows through the bending part, its flow direction changes multiple times, which makes the gas molecules collide with the pipe wall and each other more frequently, thereby dissipating part of the gas kinetic energy. The bending part further hinders the melt backflow. When the melt attempts to backflow, the bending part forces it to change direction, increasing the flow resistance of the melt. The complex flow path formed by the bending also enables the gas to exert a reaction force on the melt, further preventing it from flowing backward.

The invention discloses a polymer alloy plastic bridge and a preparation method thereof, and relates to the technical field of cable bridges, the polymer alloy plastic bridge comprises a main groove body, the main groove body is integrally formed by a bottom and two side plates, the bottom and the two side plates of the main groove body are each of a three-layer composite structure, the top of the main groove body is detachably connected with a cover plate through a buckle assembly, and the cover plate is detachably connected with the bottom of the main groove body. The three-layer composite structure sequentially comprises an alloy plastic base plate, a honeycomb-shaped reinforcing rib layer and a stainless steel plate from outside to inside. Through the design of the three-layer composite structure, the performance is synergistically enhanced, compared with a traditional plastic bridge, the weight is reduced by 30% or above, the bending strength is improved by 50%, the three-layer structure is firmly combined through the co-extrusion-mold pressing-bonding technology, the limitation of a bridge made of a single material on strength, weather resistance or weight is solved, and the service life of the bridge is prolonged. The structure has high specific strength and specific stiffness, the weight of the bridge can be effectively reduced while the overall strength of the bridge is guaranteed, installation and transportation are convenient, and the construction cost is reduced.

The present invention relates to a thermoplastic resin composition and an exterior material including the same. More particularly, the present invention has an effect of providing a thermoplastic resin composition having even and low gloss while maintaining mechanical properties and processability equal or superior to those of a conventional ASA resin; having natural coloring through control for a uniform refractive index; and being capable of reducing appearance defects due to excellent co-extrusion processability with PVC and an exterior material including the thermoplastic resin.

A method for co-extruding a pressure-sensitive adhesive and a thermoplastic elastomer is disclosed. This method may include an adhesive transfer process, a thermoplastic elastomer transfer process, and a dispensing head. The dispensing head may further include channels in which the pressure-sensitive adhesive and the thermoplastic elastomer contact. The molten pressure-sensitive adhesive and the thermoplastic elastomer are co-extruded through an outlet in a desired shape.

This invention discloses a polypropylene / polyphenylene ether composite material, foamed particles, foamed products, and a preparation method thereof. The composite material is obtained by melt co-extrusion of the following composition; the composition comprises, by weight, the following components: polypropylene: 40-80 parts; polyphenylene ether: 15-50 parts; polystyrene: 2-20 parts; functionalized polypropylene: 1-10 parts; dynamic crosslinking agent: 1-10 parts; compatibilizer: 0-5 parts; toughening agent: 0-5 parts; nucleating agent: 0-1 part; antioxidant: 0-0.5 parts. The composite material is obtained by two-step melt blending, foamed particles are obtained by autoclaving, and foamed products are obtained by steam molding. The obtained foamed products have a uniform closed-cell structure, high heat resistance, high mechanical strength, formability, and recyclability.

This invention provides a method for stably producing plastic films using recycled plastic as a raw material for packaging films, using molding methods such as the T-die method, inflation method, calendering method, or co-extrusion multilayer T-die method. [Solution] A method for manufacturing a plastic film using recycled plastic as a raw material, wherein the content of polyolefin resin in the recycled plastic is 80% by mass or more, and the film is formed by a T-die method, an inflation method, or a calendering method; and a method for manufacturing a laminate, packaging material, and lid material using the same.