25 results about "Fibrous layer" patented technology

This application relates to the technical field of polymer materials, specifically disclosing a polytetrafluoroethylene (PTFE) sealing component and its preparation process. The PTFE sealing component comprises the following raw materials: 80-85 parts PTFE powder, 5-6 parts graphite powder, 6-8 parts glass fiber, 5-6 parts chopped carbon fiber, 4-5 parts ceramic powder, 2-4 parts Y₂O₃@CeO₂ core-shell particles, and 1-3 parts molybdenum disulfide. The preparation process includes the following steps: mixing PTFE powder, graphite powder, ceramic powder, Y₂O₃@CeO₂ core-shell particles, and molybdenum disulfide, ball milling, and drying to obtain a composite powder; uniformly mixing glass fiber and chopped carbon fiber to obtain mixed fibers; alternately layering the mixed fibers and composite powder, with the fiber layer located between two composite powder layers; cold isostatic pressing to obtain a green body; and hot-pressing and sintering the green body, followed by argon plasma treatment to obtain the PTFE sealing component. This application helps reduce the performance degradation of PTFE sealing components under long-term high-temperature environments.

To provide a fiber laminated structure and waterproof breathable clothing having a highly practical waterproof breathable function with excellent light fastness and excellent recycling efficiency, the fiber laminated structure of the present invention is a fiber laminated structure including a 10 to 30 μm-thick non-porous film including a polyester film laminated on one surface of a woven fabric including a polyester fiber, wherein the polyester film contains 0.05 to 1.0 mass % of an ultraviolet absorber and a light stabilizer each, and 0.1 to 1.0 mass % of a titanium oxide having a band gap of 3.1 (eV) or more. The above fiber laminated structure can be suitably used for the waterproof breathable clothing.

This invention discloses a protective mask with synergistic cooling functions of radiation and evaporation, and its preparation method. The mask consists of inner and outer functional support layers and a core filter layer. The inner and outer functional support layers are made of polylactic acid (PLA) spunbond nonwoven material and spunlace nonwoven material, respectively. The core filter layer is an electrospun Janus PLA micro / nanofiber membrane with unidirectional moisture-wicking function. The core filter layer is composed of a hydrophobic PLA fiber layer and a hydrophilic modified PLA@PEO fiber layer, forming an inner and outer hydrophobic gradient to achieve rapid unidirectional moisture transfer from the inside to the outside and moisture evaporation cooling. In addition, the protective mask utilizes the high infrared emissivity of PLA material and the strong solar reflection characteristics of the electrospun micro / nanofiber structure to achieve radiative cooling. This invention can achieve synergistic cooling effects of radiation and evaporation while ensuring high filtration efficiency and particulate matter protection, improving thermal and humidity comfort when wearing the protective mask for extended periods.

The application discloses a kind of drip-proof flame-retardant films and its manufacturing method, belong to plastic film field.The drip-proof flame-retardant film includes: composite flame-retardant polyester film base film, at least one surface of the base film is equipped with thermal adhesive layer;The thermal adhesive layer is made of low-melting-point polyester material, the melting point of the low-melting-point polyester material is lower than 150 DEG C;The base film contains flame-retardant component;In the surface of the thermal adhesive layer, there is incombustible fiber layer.The flow ability of molten polyester film is limited under the physical hindering effect of incombustible fiber layer, and the occurrence of dripping phenomenon is effectively prevented.Experimental data show that when fiber length is greater than or equal to 8mm and the amount of addition is greater than or equal to 10 cm / cm 2 , no dripping can be achieved.The phosphorus flame retardant compounded in the base film can effectively inhibit combustion, and the physical barrier effect of the incombustible fiber layer can make the film reach a high flame-retardant grade.

This invention discloses a protective helmet and its material-structure shape-form coordination design and manufacturing method. The method includes the following steps: Aramid III and high-molecular-weight polyethylene are composited into a rigid-flexible heterogeneous gradient composite fiber layer using a hot-pressing process, which serves as the outermost layer of the helmet body; a polyurethane elastomer material is manufactured into an energy-absorbing and shock-absorbing layer using an additive manufacturing process, which is then attached to the top inner side of the helmet body and placed as the middle layer; and a polyethylene polymer material is molded into a reinforcing patch layer using a high-temperature molding process, which is then attached to the key protection area on the top inner side of the middle layer and placed as the innermost layer. This invention effectively improves the protective performance and impact resistance of the helmet, reduces its weight, increases the flexibility and mobility of soldiers on the battlefield, and enhances their combat capabilities.

The application provides a multilayer polymer biomimetic membrane for dura mater repair and a preparation method thereof. The biomimetic membrane comprises a three-layer biomimetic nanofiber composite structure: a cell adhesion inner layer on the side facing the brain tissue, an anti-adhesion outer layer on the side facing the skull, and an intermediate reinforcing layer between the cell adhesion inner layer and the anti-adhesion outer layer. The cell adhesion inner layer is a PCL / chitosan / collagen composite fiber layer, the intermediate reinforcing layer is a PCL / hydroxyapatite composite fiber layer, and the anti-adhesion outer layer is a PCL / polylactic acid-hydroxyacetic acid copolymer (PLGA) layer. The method comprises cell adhesion inner layer preparation, intermediate reinforcing layer preparation, anti-adhesion outer layer preparation, and continuous production processing. The application obtains a multilayer artificial dura mater with strong interlayer bonding, high adhesion, and biomimetic mechanical properties.

The application relates to the technical field of vehicles, and provides a bladder skin structure, an air spring, a suspension system and a vehicle. The bladder skin structure comprises a bladder skin main body and a fiber layer. The bladder skin main body comprises at least two functional sections. The fiber layer is arranged in the bladder skin main body and comprises fiber parts located in different functional sections, and the design parameters of the fiber parts are different. Therefore, the bladder skin structure can have sufficient strength in different functional sections, and the phenomenon of local stress concentration or unreasonable deformation of the bladder skin can be improved, so that material damage and fatigue failure of the bladder skin structure are delayed.

The application provides a preparation method of an anti-ultraviolet / super-hydrophobic multifunctional silk cashmere fabric, comprising the following steps: S1, adding polylactic acid powder into dichloromethane to obtain a polylactic acid solution; S2, covering the silk cashmere fabric on a receiving plate, smearing a layer of silk fibroin protein solution on the surface of the silk cashmere fabric, and preparing an electrospun fiber layer on one side of the surface of the silk cashmere fabric on which the silk fibroin protein solution is smeared through electrospinning; S3, adding raspberry-shaped CeO2 / SiO2 composite microspheres into an N, N-dimethylformamide solution, ultrasonic dispersion, then adding polylactic acid and dichloromethane into the above solution, stirring and dissolving to obtain a composite microsphere / polylactic acid precursor solution; and S4, taking the electrospun fiber layer prepared in step S2 as a receiving surface, and performing electrostatic spraying to obtain the anti-ultraviolet / super-hydrophobic multifunctional silk cashmere fabric. Through cooperation of the electrospinning and electrostatic spraying methods, the dispersibility and the bonding strength of nanometer cerium dioxide are improved.

The application provides an asymmetric anti-adhesion composite film and a preparation method and application thereof. The composite film comprises a bioactive layer and an electrospun fiber layer, and the electrospun fiber layer comprises a first fiber layer and a second fiber layer. The first fiber layer comprises fibers with a first diameter. The second fiber layer comprises fibers with the first diameter and fibers with a second diameter, and the first diameter is larger than the second diameter. The composite film has strong mechanical and degradation resistance properties, and is suitable for anti-adhesion applications of various moving organoids or tissues, so that the composite film still has structural integrity and functional integrity for a long time in these environments. One side of the composite film has adhesive fibers, and has stronger adhesion in a wet state, so that the composite film cannot be easily displaced when applied to moving organoids or tissues.

This utility model discloses a pipe repair material and a pipe, relating to the field of pipe repair technology. It includes: a surface layer annularly attached to the inner wall of the pipe to be repaired, comprising a basalt chopped fiber layer and multiple layers of first polyester fiber felt. A basalt chopped fiber layer is disposed between adjacent first polyester fiber felt layers, and a first polyester fiber felt layer is disposed on both sides of any basalt chopped fiber layer. The first polyester fiber felt layer and the basalt chopped fiber layer are needle-punched together to form an integrated structure. In this utility model, the basalt chopped fiber layer is disposed between two layers of polyester fiber felt. During the needle-punching process of the basalt chopped fiber layer and the polyester fiber felt layer, the basalt chopped fiber can penetrate into the polyester fiber felt layers on both sides to provide reinforcement. The basalt chopped fiber, combined with the polyester fiber felt, can improve both the interlayer bonding strength and the corrosion resistance of the overall surface layer.

The utility model discloses a kind of anticorrosive structures of concrete pool, the anticorrosive structure includes a concrete pool main body and a anticorrosive structure main body being set in the concrete pool main body, the anticorrosive structure main body includes sequentially connected from bottom to top: a reinforced concrete component layer being fixedly connected at the bottom of the concrete pool main body;A waterproof layer;A first vinyl resin layer;A glass fiber short-cut felt layer;A second vinyl resin layer;A first glass fiber layer;A third vinyl resin layer;A second glass fiber layer;A fourth vinyl resin layer;A third glass fiber layer;And a fifth vinyl resin layer.The utility model effectively solves the problem that the anticorrosive force of existing concrete pool is limited, and corrosion failure is likely to occur during long-term use, and concrete pool is also likely to crack and permeate, which affects normal use.

This invention discloses a biodegradable, three-proof (oil-proof, water-proof, and gas-proof) fabric, comprising, from top to bottom, a three-proof functional surface layer, an adhesive layer, and a biodegradable fiber layer; the upper surface of the three-proof functional surface layer has a microscopic uneven structure; the biodegradable fiber layer is a blend of polylactic acid (PLA) fiber and poly(3-hydroxybutyrate) fiber. This invention employs a multi-layer structure to achieve both the three-proof and gas-proof functions and the biodegradability of the fabric. The microscopic uneven structure of the three-proof functional surface layer increases the contact angle between the fabric surface and pollutants, thereby achieving an oil- and water-repellent three-proof effect. The biodegradable layer, made by blending polylactic acid (PLA) fiber and poly(3-hydroxybutyrate) fiber, achieves the fabric's biodegradability. The source of the blended fibers no longer depends on petrochemical products, and under appropriate conditions, it can achieve complete biodegradation, generating harmless small molecules, making it environmentally friendly.

This application discloses a fiber scaffold and its preparation method, a fiber scaffold system and its preparation method, belonging to the field of medical devices. The scaffold has a hollow tubular structure, including an inner fiber layer, a fiber support structure, and an outer fiber layer. The fiber support structure is coaxially sleeved on the outer surface of the inner fiber layer, and the outer fiber layer covers the outer surfaces of the inner fiber layer and the fiber support structure. The fiber porosity of the inner fiber layer is less than or equal to that of the outer fiber layer. The fiber support structure is composed of electrospun fibers and includes annular bodies distributed along the axial direction of the scaffold, with axial spacing between adjacent annular bodies to provide radial support. This application utilizes the annular bodies to provide radial support, while the axial spacing provides deformation space for bending, giving the scaffold both radial stiffness and axial flexibility; the differentiated porosity design is beneficial for cell infiltration and tissue regeneration, making it suitable for vascular interventional therapy.

A CMC airfoil includes core fiber plies that define a radial tube that circumscribes an internal cavity, and skin fiber plies that define an exterior of the airfoil section. There is a filler element in the trailing edge region aft of the internal cavity and sandwiched between the skin fiber plies on the pressure side and the skin fiber plies on the suction side. At least one cooling passage includes at least one inlet orifice section that opens to the internal cavity and extends through the core fiber plies, a radially-elongated multi-dimensional plenum connected with the at least one inlet orifice section, a plurality of outlet orifice sections extending through the trailing edge, and a plurality of intermediate passage sections bound by at least one of the skin plies and the filler element and connecting the radially-elongated multi-dimensional plenum with the plurality of outlet orifice sections.

This invention provides a method for preparing a self-protective conductive foamed gradient filter material. The method involves directly generating conductive protective layers on the upper and lower surfaces of the intermediate glass fiber layer, thus making the filter material itself conductive. It includes a top foamed layer, an intermediate glass fiber layer, and a bottom foamed layer. After the intermediate glass fiber layer is fabricated, conductive protective layers are directly generated on the top and bottom surfaces of the intermediate glass fiber layer through foaming. Both the top and bottom foamed layers are thermoplastic polymer protective layers containing conductive substances, prepared through a foaming process.

The skin component (30) includes a fiber layer (41) composed of multiple fibers (42) arranged in a planar shape. The fiber layer (41) is stacked in more than 30 layers in the front-back direction, and the maximum external dimension L1 of the cross-section of the fibers (42) constituting the fiber layer (41) is 1 to 6 μm. With such a structure, it is possible to provide a skin component that can reflect light without forming a metal vapor deposition film.

The application provides a double-layer stent and a preparation method thereof, which comprises the following steps: dissolving L-polylactic acid in a solvent, adding calcium salt to the L-polylactic acid, and mixing to obtain a precursor solution; then electrospinning the precursor solution to obtain a fiber membrane; drying the fiber membrane to obtain a fiber layer of the double-layer stent; dissolving polyvinyl alcohol, gelatin and polyamide in a binary solvent, adding barium titanate to the binary solvent, and mixing to obtain a hydrogel solution; placing the fiber membrane at the bottom of a mold, then placing the hydrogel solution in the mold, and then performing freeze-crosslinking to shape the hydrogel in the double-layer stent; and finally immersing the hydrogel in the double-layer stent after demolding in salt water to obtain the double-layer stent. The fiber membrane and the hydrogel solution are combined through freeze-crosslinking to obtain the double-layer stent, and the double-layer stent can accelerate the formation of new bone when applied to osteoporotic bone defects and under the stimulation of ultrasonic waves.

The application belongs to the technical field of textile fabrics, and particularly discloses a colored acrylic dye-free outdoor fabric, which is used to solve the problem of how to realize the ultraviolet resistance of the fabric, effectively avoid aging and color fading, and ensure the aesthetic property; specifically comprises a fabric main body, a colored acrylic layer is arranged on the fabric main body, polyester filaments are arranged in the colored acrylic layer, and a polyurethane varnish layer is arranged on the outside of the colored acrylic layer; on one hand, the colored acrylic layer, the polyester filaments and the ultraviolet resistance coating can realize the ultraviolet resistance of the fabric, effectively avoid aging and color fading, and ensure the aesthetic property; on the other hand, the setting of the nylon fiber layer, the spandex fiber layer and the colored acrylic short fiber layer can improve the elasticity of the fabric, so that the fabric can still maintain a good state under frequent use and complex environment, and the service life of the fabric can be prolonged.

A method for manufacturing a part of revolution in composite material with locally optimized properties and the resulting part of revolution. A method for manufacturing a part of revolution in composite material comprises: - the deposition of a plurality of unidirectional fibrous layers on a mandrel (200) in order to obtain a fibrous preform of a structural ferrule (100), - the winding in one or more turns of a textile strip (90) on the external surface (100b) of the fibrous preform (100) in order to obtain a fibrous preform of a reinforcing belt, the textile strip (90) being formed with fibers having an elongation at break greater than or equal to 1.6%,- the densification of the fibrous preform of the structural ferrule and the fibrous preform of the belt by a matrix so as to obtain a part of revolution in composite material comprising a structural ferrule made of a fibrous reinforcement corresponding to the fibrous preform (100) of the structural ferrule densified by the matrix and a reinforcing belt of composite material present on an external surface of the structural ferrule. Figure for the abbreviation: Fig. 5.,

The present application relates to a kind of hydrogel fiber multilayer spunlace mask substrate and its preparation method, belong to non-woven mask substrate technical field, a kind of hydrogel fiber multilayer spunlace mask substrate and its preparation method, mask substrate is by upper CMC carboxymethylation hydrogel fiber layer, middle spunlace support layer, lower PET / PA filament ultrafine fiber layer is formed by multilayer spunlace composite.Carefully preparation method includes: preparation CMC hydrogel layer and filament superfine layer respectively, again by three layers of net, high-pressure spunlace composite, drying and shaping and post-finishing are obtained finished product.The substrate of the present application has high water retention rate, good skin adhesion, liquid absorption is gel, can absorb heavy metal, does not drop chip, high strength, sensitive skin friendly, process stable and mass production, suitable for high-end moisturizing, repair, soothing, fade class mask.

A composite fabric includes a film, a first fibrous layer, a fabric layer, and a second fibrous layer. The film has a first side and a second side. The first fibrous layer has a first side connected to the second side of the film and a second side. The fabric layer has a first side connected to the second side of the first fibrous layer and a second side. The second fibrous layer has a first side connected to the second side of the fabric layer and a second side. The film can be a non-heat shrinking film. The composite fabric may also include one or more retaining members for contacting a surface on which the composite fabric is placed and resisting movement of the composite fabric relative to the surface.

The present invention relates to a molding material comprising a) a primary nonwoven fiber layer; b) a secondary nonwoven fiber layer; and c) a resin layer, wherein the resin layer bonds the secondary nonwoven fiber layer to a first surface of the primary nonwoven fiber layer and the resin layer is exposed on a second surface of the primary nonwoven layer.

The application discloses a multifunctional wound dressing and a preparation method and application thereof. The multifunctional wound dressing comprises a first fiber layer, a second fiber layer and a third fiber layer which are sequentially stacked, and the porosity and fiber diameter of each layer satisfy the following relationship: the first fiber layer < the second fiber layer < the third fiber layer. The first fiber layer comprises chitosan, gelatin and modified nano-hydroxyapatite. The second fiber layer comprises a first high polymer material, temperature-sensitive phase change nano-microcapsules, nano-silver, radiation refrigeration particles and an emulsifier. The third fiber layer comprises a second high polymer material and hydrophobically modified nanocellulose. The multifunctional wound dressing is prepared by using a multi-nozzle electrostatic spinning device for partitioned temperature and humidity control. Under the synergistic effect of the above-mentioned material selection, structure design and process optimization, the multifunctional wound dressing can realize rapid hemostasis, bidirectional temperature control and protection, and has a good application prospect in wound repair of burn wounds, surgical wounds and the like.

The utility model relates to a kind of sports protective equipment, specifically to a carbon fiber knee protector with polymethacrylimide sandwich, including knee pad main body and several connecting knee pad main body's elastic bands, knee pad main body includes structure main body and the EVA sponge body connected with structure main body, elastic band one end is fixedly connected with EVA sponge body one side, and elastic band other end is movably connected with the other side of EVA sponge body;Structure main body is multilayer composite structure, from inside to outside in order to first carbon fiber layer, polymethacrylimide layer and second carbon fiber layer;The utility model can absorb energy shock attenuation, reduce impact force, effectively protect the knee of user, reduce the impact force when being impacted, while reducing weight, improve the comfort of wearing, reduce the influence to user movement.