73 results about "Secondary layer" patented technology

The invention relates to the field of low-temperature liquefied gas storage equipment, and discloses a low-temperature liquefied gas film storage tank and an installation method thereof.The low-temperature liquefied gas film storage tank comprises an outer tank and a plurality of insulation box structures installed on the outer tank; the insulation box structure comprises a secondary insulation box, a secondary shielding layer, a main plywood and a main shielding layer which are arranged in sequence, and the corrugation position of the main shielding layer corresponds to the corrugation position of a corrugated plate in the secondary shielding layer; a gap is formed between every two adjacent insulation box structures, a secondary layer connecting plate is connected between every two adjacent secondary shielding layers, a main layer connecting plate is connected between every two adjacent main shielding layers, and the secondary layer connecting plates and the main layer connecting plates are located above the gaps. The gap between the adjacent insulation box structures can be effectively processed, and the integrity and the sealing performance of the shielding layer are improved.

The invention discloses a film type liquid cargo containment system which comprises a plane insulation module, a corner insulation module and a nitrogen pipeline, the plane insulation module and the corner insulation module are fastened on the inner wall of a storage tank cabin, and each of the plane insulation module and the corner insulation module is composed of a main layer insulation module and a secondary layer insulation module. The main layer insulation module is fixed above the secondary layer insulation module to form step surfaces, a first bridging module, a second bridging module and a corner region bridging module are respectively mounted on the step surfaces at different positions, and nitrogen pipe mounting grooves are formed in the first bridging module, the second bridging module and the corner region bridging module through which a nitrogen pipeline passes; the arranged nitrogen pipe mounting grooves are connected to form a nitrogen arrangement pipeline; the invention further discloses a nitrogen pipeline mounting method. According to the thin film type liquid cargo containment system, the nitrogen pipelines are embedded in the bridging modules, so that the flatness of the upper surface of the main layer insulation structure of the containment system can be kept, and the thin film type liquid cargo containment system is adaptive to more types of corrugated plate structures.

The invention relates to the field of thin film tank maintenance, and discloses a low-temperature liquefied gas storage tank heat insulation maintenance system and an installation method thereof.The low-temperature liquefied gas storage tank heat insulation maintenance system comprises a main shielding layer, a plurality of secondary-layer corrugated plates, a plurality of knots and a plurality of insulation box structures; the plurality of insulation box structures are used for being mounted on an outer tank; the insulation box structure comprises a secondary-layer insulation box, a secondary-layer steel plate and a main plywood which are arranged in sequence. A gap is formed between adjacent insulation box structures, the secondary corrugated plate is only arranged at the gap, and the side edge of the secondary corrugated plate is welded with the secondary steel plate; and the knots are arranged at the intersections of the adjacent gaps. According to the invention, the deformation of the corrugated plate is more uniform by reducing the shrinkage amount of a single insulation box, the workload of field installation can be reduced, and the procedure of traditional layered construction is optimized, so that the construction efficiency is improved, and the construction period is shortened.

A non-limiting example of the coated cutting tool of the present application has a substrate and a coating layer on the substrate. The coating layer has a first coating layer having a first layer containing Al2O3 particles and a second layer on the first layer. The second layer has, in order from the substrate side, a first film, a second film in contact with the first film, and a third film in contact with the second film. The first film, the second film, and the third film each contain Ti. The first film, the second film, and the third film each contain at least one selected from C and N. When the amount of N contained in the first film is a first N amount, the amount of N contained in the second film is a second N amount, and the amount of N contained in the third film is a third N amount, the following relationship is satisfied: the first N amount > the third N amount > the second N amount.

The invention relates to a heat exchanger / reactor or heat exchanger comprising: - a main body (1) having, over at least one axial portion thereof, the general shape of a cylinder of revolution about a central axis (Y), the body (1) comprising: • a primary circuit comprising a plurality of primary layers (10) each comprising at least one primary channel (12), • a secondary circuit (25) comprising a plurality of secondary layers (20) each comprising at least one secondary channel (22), the secondary channel (22) extending longitudinally in a radial direction towards the side wall (4) of the body (1), and • a plurality of isthmuses (30), wherein the primary and secondary layers, separated by isthmuses, are distributed among a plurality of sectors (40), at least one of which sectors (40) comprises • a primary layer extending radially along a non-rectilinear primary axis of extension (Yp), and • a secondary layer extending along a non-rectilinear secondary axis of extension (Ys).

A method to manufacture a structural component in composite material reinforced with stiffening stringers and comprising a skin and plurality of stringers having a hollow section fixed to said skin. The method comprising: a) laminating a plurality of first layers of composite material onto an external surface of a cure tool, b) laminating pluralities of second layers of composite material on longitudinal hollow expandable inserts, c) positioning each reinforcing element on a face of a second skin, d) holding each reinforcing element on the face of the second skin; e) housing the tool, skin and reinforcing elements inside a vacuum bag; and f) compacting together the first layers forming the skin with the second layers forming the stringers; g) housing skin and reinforcing elements in a further vacuum bag; and h) sealing the further vacuum bag; and i) applying preset temperature and pressure to the outside of the vacuum chamber.

The invention provides a preparation method of a water-proof and oxygen-proof nanocrystal composite material, which comprises the following steps: atomizing and drying a solution I containing a nanocrystal precursor and a polymer to obtain nanocrystal composite particles, dispersing the nanocrystal composite particles in a colloidal solution, ultrasonically and uniformly mixing the nanocrystal composite particles with a solution II containing a water-proof and oxygen-proof polymer, and performing secondary atomizing and drying to obtain the water-proof and oxygen-proof nanocrystal composite material. And forming a polymer protective layer with water and oxygen barrier property on the surfaces of the nanocrystalline composite particles to obtain the water-proof and oxygen-proof nanocrystalline composite material. The nanocrystalline composite material can be dispersed in packaging base materials such as EVA and POE, has high photoelectric conversion efficiency, maintains long-term environmental stability, and remarkably prolongs the service life of a display device. According to the preparation method, the nanocrystalline composite material is prepared by adopting a secondary spray drying process, the destructive effect on the nanocrystalline material in a traditional liquid phase coating method is avoided, the second waterproof oxygen-barrier polymer layer can greatly improve the environmental stability of the nanocrystalline material, and meanwhile, the nanocrystalline material can be prepared with high efficiency and high material utilization rate; and the method is suitable for large-scale production.

Provided is a mask that easily maintains a three-dimensional shape covering a mouth space. A mask (1) comprises a cover part (2) having a plurality of base material sheets. The base material sheets have a pleat part (18) folded in a pleated shape with a fold line extending in the lateral direction as a base point. The cover part has a first layered region (R41) and a second layered region (R42) that are adjacent to each other via a fold line and overlap each other in an unextended state. The cover part is provided with a joining part (50) extending in the lateral direction, the joining part (50) joining the plurality of base material sheets. The joining part is provided in only one of the first layered region and the second layered region so as not to straddle any fold line in the unextended state. The joining part has a first joining part (51) and a second joining part (52). The first joining part is disposed on both sides in the lateral direction across a first non-joining region (R11) straddling the lateral center of the cover part. The second joining part is disposed on both sides in the lateral direction across a second non-joining region (R12) straddling the lateral center of the cover part.

The invention relates to a bearing ring (1) having a sandwich structure of at least three layers (2, 4, 6), a first layer (2) at least partially forming a running surface (8), a second layer (6) being arranged on the first layer (2) as an intermediate layer, a third layer (4) being arranged at least partially on the intermediate layer (6), the first layer (2) being made of a first material, the intermediate layer (6) being made of a second material, the third layer (4) being made of a third material, the second material is different from the first material and the third material, and the second material of the intermediate layer (6) comprises a material that performs insulating, damping and / or weight-reducing functions.

A system and method for repairing fatigue cracks in a multilayer composite (140). The method includes repairing a fatigue crack at a first interface between a first layer of the multilayer composite and a second layer of the multilayer composite. The method further includes repairing a fatigue crack at a second interface between a second layer of the multilayer composite and a third layer of the multilayer composite. The method further includes anchoring the second interface with a third layer of the multilayer composite to prevent failure caused by fatigue cracks.

A low-weight carpet tile and process for making the same, wherein the carpet tile comprises a facecloth having a plurality of face yarns tufted through a primary backing, an extruded polymer secondary backing layer, and a reinforcing scrim layer partially embedded within the extruded polymer secondary backing layer. The top surface and bottom surface of the carpet tile are defined by the facecloth and the reinforcing scrim layer, respectively. A polymer-based resin is extruded onto the facecloth to form an at least substantially uniform secondary backing layer, and the reinforcing scrim layer is laid onto the extruded polymer secondary backing layer while the extruded polymer secondary backing layer remains above a softening temperature for the resin. The entire multi-layer web is then passed through a nip to embed the reinforcing scrim layer into the extruded polymer secondary layer, and the entire web is chilled.

The invention discloses an adjustable ultra-wideband terahertz metamaterial wave absorber, and belongs to the technical field of terahertz wave absorbers. The wave absorber is composed of a plurality of same metamaterial structure units which are periodically arranged, and each metamaterial structure unit is made of three layers of composite materials, wherein the first layer is a graphene pattern layer, the second layer is a polyimide dielectric layer, and the third layer is a copper reflecting layer. Wherein the graphene pattern layer adopts a combined design of four groups of square and L-shaped structures, and the four groups of structures form a biaxial symmetry layout through geometric coupling. The structure has the characteristics of wide absorption bandwidth, high absorption rate and dynamic adjustability, can realize more than 90% of efficient absorption in the frequency band of 2.28-4.68 THz, and can adjust the Fermi level of the graphene by externally applying bias voltage to realize rapid switching between the absorption state and the reflection state. The device is suitable for various application scenes such as terahertz communication, sensing and stealth.

The invention relates to a composite material film three-in-one thermal laminating device, and relates to the technical field of composite film production, the composite material film three-in-one thermal laminating device comprises a first layer film, a second layer film and a middle film, the upper surface of the first layer film and the lower surface of the second layer film are respectively provided with a circulating laminating outer film used for contact protection, and the circulating laminating outer film can be recycled. According to the application, the circulating laminating outer film made of a polytetrafluoroethylene (PTFE) material is introduced as a physical isolation layer and covers between the film and the hot pressing roller, so that the non-laminating surface of the film is prevented from being in direct contact with the hot pressing roller, and impurities (such as residual colloidal particles and dust) can be prevented from being adhered to the surface of the hot pressing roller; the defects of concave-convex surface, scratches and the like of the composite film caused by roll surface pollution are fundamentally eliminated, and meanwhile, the PTFE film has the characteristics of high heat resistance (less than or equal to 260 DEG C) and low surface energy, so that the PTFE film is not easy to adhere impurities and can be repeatedly used, and the flatness and the yield of the finished film are remarkably improved.

A sheet of material that is marked in a predetermined pattern with a pulsed laser on its outer surface. The sheet material is a layered material that has an outer surface and an inner surface separated by a core. There is a first layer comprising a first material beginning at the outer surface and extending into the core and there is a second layer containing the second material within the core. The outer surface further has a patch, that is a region of the outer surface where the second material is disposed at the outer surface, and at least a portion of the laser marks are disposed on the patch.

The application discloses a flexible sheet feeding conveying device and belongs to the technical field of feeding equipment. The feeding conveying device comprises a feeding conveying assembly, the feeding conveying assembly comprises a pressing mechanism, a transfer mechanism and a clamping mechanism arranged on the transfer mechanism, the clamping mechanism arranged on the transfer mechanism is driven to move by the transfer mechanism in the feeding conveying assembly, so that the second clamping arm in the clamping mechanism can be inserted into the gap between the top layer sheet and the secondary layer sheet along the upper surface of the secondary layer sheet, then the top layer sheet is clamped by the opposite movement of the first clamping arm and the second clamping arm, and then the top layer sheet is transferred by the clamping mechanism. And the pressing mechanism is used for pressing the upper surface of the secondary layer sheet, which fixes the secondary layer sheet on one hand and avoids the movement of the secondary layer sheet, and on the other hand, the gap between the secondary layer sheet and the top layer sheet is increased, which is more conducive to the insertion of the first clamping arm into the gap to clamp the top layer sheet.

The application discloses a preparation method of an environment-friendly degradable single-side perspective sticker and belongs to the technical field of modified nanometer materials. The method comprises the following steps: (1) preparation of a multilayer composite structure: mixing polylactic acid and polybutylene succinate, adding nano-montmorillonite and a surface modifier to melt blend to form a first layer melt; stirring polybutylene adipate terephthalate and fluorescent carbon nanodots to form a second layer melt; and forming a film blank by co-extruding the first layer, a pressure-sensitive adhesive layer and the second layer; (2) construction of a nanometer film: biaxially stretching the film blank, pressing a micropore array, immersing in a silver nanoparticle suspension and drying to obtain a nanometer film; (3) functionalization treatment of a coating layer: immersing in a fluorine-containing nanometer coating solution and solidifying; and (4) post-treatment: secondary solidification. The obtained single-side perspective sticker is suitable for fields such as building and vehicle privacy films, and solves the problems of large pollution and slow degradation of traditional stickers.

The utility model provides a target material structure. The target material structure comprises a target blank and a substrate which are arranged in a stacked mode. The target blank is divided into a first layer of target blank and a second layer of target blank along the thickness direction, and the second layer of target blank is connected with the substrate; the edge of the surface, far away from the second-layer target blank, of the first-layer target blank is an inclined surface; the side surface of the second layer of target blank is vertical to the bottom surface; and the edge of the lower end of the inclined surface is in transition connection with the upper edge of the side surface of the second-layer target blank through a round chamfer. According to the utility model, the side surface of the second layer of target blank is limited to be perpendicular to the bottom surface, so that a sharp corner at the outermost edge of the target blank is avoided, and corner chipping and slag falling of the outermost edge of the target blank can be avoided.

A coated tool according to one aspect of the present disclosure, comprising a base body and a coating layer, wherein the coating layer has a Ta-containing multilayer structure in which a local maximum value and a local minimum value of a Ta content ratio in atomic percent alternate in a stacking direction, wherein the Ta-containing multilayer structure comprises a plurality of high Ta-content layers and a plurality of low Ta-content layers, the plurality of high Ta-content layers comprising a plurality of first high Ta-content layers and a plurality of second high Ta-content layers, each arranged between the first high Ta-content layers that are adjacent in the stacking direction, and,If a local maximum value of the first layer with high Ta content is defined as the first local Ta maximum value, and a local maximum value of the second layer with high Ta content is defined as the second local Ta maximum value, the second local Ta maximum value is smaller than the first local Ta maximum value.

A panel comprising a honeycomb core is disclosed. In various embodiments, the honeycomb core is comprised of a folded material. In certain embodiments, the honeycomb core is comprised of an extruded material. A panel comprising a core comprised of a dimpled material is also disclosed. In at least one embodiment, the core is comprised of polyethylene and wood embedded in the polyethylene. The core comprises a first face and a second face opposite the first face and the deck board further comprises a first layer attached to the first face and a second layer attached to the second face. In various embodiments, the first layer and the second layer are thermally bonded to the core during a continuous manufacturing process. The panel can further comprise a decorative and / or performance layer bonded to the second layer.

The present disclosure relates to a multilayer radon-impermeable structure for construction applications. The present disclosure relates to a multilayer radon-impermeable structure for construction applications comprising: a substrate layer; a framework set applied over the substrate layer, with spaces between the components of said framework set to allow for air circulation and fluid drainage; a first layer of radon-impermeable material applied directly over the framework set; a second layer of radon-impermeable material applied over the first layer of radon-impermeable material, wherein the second layer of radon-impermeable material is applied in a crosswise orientation relative to the first layer for additional reinforcement and ensuring continued protection in case of failure of the first layer.

The application discloses a kind of multilayer structure nanofiber composite filter materials, it is related to air filter material technical field, the filter material has four-layer structure, first layer structure is filter surface layer, and the weight ratio of proportion is less than 30% of the total weight of filter material, second layer structure is nanofiber composite layer, and more than 95% of the fiber diameter distribution of nanofiber composite layer is 0.1~10 μm, third layer structure is base cloth layer, fourth layer structure is the support layer of filter material, and the weight ratio of proportion is higher than 40% of the total weight of filter material, the total weight of the filter material is 350‑950g / m 2 The filter material has the characteristics of high-precision filtration and high wind speed resistance, and can maintain stable performance after long-term use, and is suitable for industrial flue gas treatment, waste gas treatment and other fields.

The invention relates to a ship liquid cargo tank sub-layer invar batten structure and an arrangement and installation method, the ship liquid cargo tank sub-layer invar batten structure comprises a first sub-layer invar batten, a plurality of second sub-layer invar battens and a third sub-layer invar batten, any two of the plurality of second sub-layer invar battens are connected through a second fixing part, and the third sub-layer invar batten is connected through a second fixing part. The first sub-layer invar batten is connected with the second sub-layer invar batten located at the first position through a first fixing part, the third sub-layer invar batten is connected with the second sub-layer invar batten located at the tail position through a third fixing part, and the connecting points serve as hinge points or stress release points. Small relative displacement or rotation can occur between connecting points, so that thermal stress is effectively absorbed and dispersed, excessive concentration of stress at a single position is avoided, the sectional type flexible connecting structure adapts to small deformation and unevenness of the base and can be finely adjusted along with changes of a ship body, additional internal stress is reduced, and the service life of the ship body is prolonged. And the overall sealing performance and integrity of the invar layer are improved.

The embodiment of the present application provides a kind of installation method of two-side angle area arrangement structure of thin film type containment system, and thin film type containment system includes main layer film layer, fastening card, main layer insulation layer, secondary layer film layer and secondary layer insulation layer connected and fixed to ship structure in sequence by penetrating fastener, and main layer film layer, main layer insulation layer, secondary layer film layer and secondary layer insulation layer are enclosed to form a low-temperature liquid cargo storage tank for accommodating ultra-low temperature medium, and main layer film layer is in contact with ultra-low temperature medium;In the angle area of two sides intersection in thin film type containment system, including main layer two-side angle area and secondary layer two-side angle area, installation method includes: installing distance plate on the bulkhead of ship structure according to setting line, and the stud of distance plate of two-side angle area plane transition secondary insulation module and two-side angle area secondary insulation module for positioning secondary layer two-side angle area, and then installing two-side angle area plane transition secondary insulation module and two-side angle area secondary insulation module and other modules.

A sheet of material that is marked in a predetermined pattern with a pulsed laser on its outer surface. The sheet material is a layered material that has an outer surface and an inner surface separated by a core. There is a first layer comprising a first material beginning at the outer surface and extending into the core and there is a second layer containing the second material within the core. The outer surface further has a patch, that is a region of the outer surface where the second material is disposed at the outer surface, and at least a portion of the laser marks are disposed on the patch.

Methods and apparatus for processing a substrate include sputtering a first seed layer having a first thickness on the substrate, the first seed layer comprising a thermal interface material having a tilted crystallographic orientation with respect to the substrate; sputtering a second layer having a second thickness on the first seed layer, the second layer comprising the thermal interface material; and polishing the second layer until a surface roughness of the second layer is suitable for at least one ef fusion bonding, thermal compression bonding, or hybrid bonding.

The composite material has a plurality of first layers and a plurality of second layers. The number of the first layers and the number of the second layers are 5 or more in total. The first layers and the second layers are alternately stacked in a thickness direction of the composite material in a manner that the first layers are located on a first surface and a second surface. The first layers are formed of a metal material in which copper is a main component. The second layers have a molybdenum plate and a copper filler. The molybdenum plate includes end surfaces in the thickness direction, i.e., a first surface and a second surface, and a plurality of opening portions that penetrate the molybdenum plate from the first surface toward the second surface. The copper filler is disposed inside the opening portions. A thickness of the first layer located on the first surface is 0.025 mm or more and 30% or less of a thickness of the composite material. A thickness of the second layer in contact with the first layer located on the first surface is 0.05 mm or more and 35% or less of the thickness of the composite material.

The invention provides a cargo containment system and a construction method thereof.The cargo containment system comprises a main layer and a secondary layer, the main layer comprises a plurality of main layer modules distributed in an array mode, each main layer module comprises a frame and bottom corners arranged on the periphery of the frame, and grid-shaped reinforcing beams are arranged in the frames; the secondary layer comprises a plurality of secondary layer modules distributed in an array mode, each secondary layer module comprises a secondary layer insulator and a supporting base, the four corners of the cross-shaped secondary layer insulator are concave spaces, and the supporting bases are arranged in the concave spaces; the secondary layer is arranged below the main layer, and one supporting base is correspondingly arranged below the bottom corner of each main layer module in sequence. The main layer and the secondary layer can be prefabricated in a modularized mode and have high strength and rigidity, so that the cargo containment system is integrally reinforced, the cargo containment system can adapt to a hoisting construction mode, and the multi-liquid-level filling transportation condition is met. The beam system, the base angles and the supporting bases are used for achieving surface-to-point force transmission and layer-to-layer force transmission, and loads generated by low-temperature media are evenly transmitted to the ship body.

Title: Stress-Reducing Two-Layer Bonding Method The invention relates to a method for bonding a layer based on a first material and a layer based on a second material. The method comprises a step of supplying a stack (1) comprising a first layer (100) based on the first material, preferably silicon-based, and a second layer (200) based on the second material. The first and second materials are preferably distinct. The first layer has a first upper face (101). The method then provides a step of forming, from its first upper face through its entire thickness, a network of trenches (120) in the first layer. The stack is then subjected to a consolidation anneal. Figure for the abstract: Fig. 1C