851results about "Protective equipment" patented technology

The invention belongs to the technical field of personal protection equipment, and particularly relates to a lightweight cut-resistant four-dimensional structure fabric based on high-performance composite fibers and a preparation method of the lightweight cut-resistant four-dimensional structure fabric. The structure is based on a high-performance composite fiber material and a nano silicon carbide embedding technology of high-performance polyethylene fibers, the hardness bottleneck of a single material is broken through, and multi-fiber compatibility is improved through cooperation of polyurethane fiber surface activation and polyurethane fiber anti-melting modification. The gradient twist core sheath yarn is a high-performance composite yarn, and the strength and the flexibility are balanced. In the aspect of the oversleeve fabric structure, a three-dimensional protection system comprising a honeycomb structure, a silica gel liner and a skin-friendly inner layer is adopted, so that the integration of multiple functions of hydrophobicity, fusion resistance and buffering of a light-weight cut-resistant material is realized. Under the EN 388 standard, 5-level cutting prevention can be achieved, a single high-performance polyethylene fiber cutting prevention oversleeve can only reach 3-4 levels, the weight of the composite fiber material is reduced by 40% compared with that of a full aramid fiber oversleeve, the thickness is reduced by 25%, and the composite fiber material can be suitable for complex scenes such as petroleum and electric power.

The invention relates to the field of cooling of human body protective clothing, in particular to a cooling fabric based on phase change microcapsules. The cooling fabric comprises a polyester fiber layer, a phase change microcapsule layer and a PTFE waterproof breathable film layer. The polyester fiber layer is made of skin-friendly polyester fibers, has excellent moisture absorption and sweat releasing performance and can improve wearing comfort. The phase-change microcapsule layer is formed by uniformly embedding microcapsules coated with a phase-change material into the textile structure, and absorbs heat and generates phase change when the environment temperature rises, so that the temperature of the fabric is reduced; the PTFE waterproof breathable film layer has waterproof and breathable functions, can prevent external liquid from permeating, allows water vapor to permeate, and enhances environmental adaptability. By optimizing the spinning method of the phase-change microcapsules, the phase-change heat exchange efficiency can be improved while the air permeability of the fabric is kept, and the cooling performance of the fabric at high temperature is ensured. The fabric can be widely applied to high-temperature work clothes, outdoor sportswear and intelligent temperature control textiles, and has the advantages of being high in temperature adjusting capacity, comfortable, breathable and the like.

A three-dimensional microlattice layer comprising a plurality of interconnected filaments extending along at least three different directions from a plurality of nodes. The microlattice layer may further comprise at least one material layer extending laterally between and interconnecting at least two or more nodes. The at least one material layer may be configured to transversely and rotationally constrain the nodes to increase the overall compressive strength and stiffness of the microlattice structure. The at least one material layer may comprise a single, continuous layer and / or a plurality of material layer segments. The microlattice layer may comprise a single, continuous layer or a plurality of microlattice layer segments. The microlattice layer may be stacked, the stacked microlattice layers may further comprise one or more material layers and / or one or more impact mitigation layers.

A protective garment is disclosed that is reusable and can be relaundered over 70 times. The garment is made from a single layer barrier fabric. Any seams on the protective fabric are covered with a seam tape. The seam tape can include an adhesive layer, a cover layer, and an optional film layer positioned between the cover layer and the adhesive layer. The adhesive layer can be a crosslinkable polyester polymer.

A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.

The invention discloses a hybrid gradient fiber composite bulletproof laminated plate and a preparation method thereof, and belongs to the technical field of composite target plates. The preparation method comprises the following steps: coating the surface of each aramid fiber cloth laminated layer with waterborne polyurethane, and sequentially performing drying and tailoring forming to obtain a plurality of tailored and formed aramid fiber cloth composite layers; respectively cutting and forming the plurality of ultra-high molecular weight polyethylene fiber non-woven fabric laminated layers; and sequentially carrying out staggered stacking, wrapping, mold embedding and hot press molding on the waterborne polyurethane layers in the multiple tailored and molded ultra-high molecular weight polyethylene fiber non-woven fabric laminated layers and the multiple tailored and molded aramid fiber cloth composite layers, so as to obtain the hybrid gradient fiber composite bulletproof laminated plate. The interface bonding between the aramid fiber cloth and the ultra-high molecular weight polyethylene non-woven cloth in the hybrid gradient fiber composite bulletproof laminated plate is firm, and the hybrid gradient fiber composite bulletproof laminated plate has good energy absorption and blunt impact resistance effects and good bulletproof performance.

The invention discloses a shear thickening fluid and gradient negative Poisson's ratio metamaterial composite impact-resistant energy-absorbing structure, which comprises an upper high-strength aluminum alloy plate, a lower high-strength aluminum alloy plate and a middle multi-layer gradient honeycomb core, the honeycomb core adopts a single reentrant hexagonal structure, and concave angles of each layer are gradually increased layer by layer to realize graded absorption and uniform dispersion of impact energy. The honeycomb units are filled with the shear thickening fluid, the shear thickening fluid is rapidly tackified at a high shear rate in the compression deformation process of the negative Poisson's ratio honeycomb core, and the energy dissipation performance of the composite protection structure is improved through cooperative energy absorption of the gradient negative Poisson's ratio honeycomb structure and the shear thickening dynamic thickening effect. All the layers are tightly connected through a high-strength interface bonding technology, and the overall structure is stable and durable. According to the invention, impact energy transfer is effectively blocked, light weight, simple process and cost optimization are taken into consideration, and the method is suitable for high-impact scenes such as aviation, automobiles and buildings, and has wide market prospects and application values.

A protective lens stack comprises a base layer including a polyethylene terephthalate (PET) film containing a UV blocking additive and one or more removable lens layers stacked on top of the base layer. Each of the removable lens layers may include a PET film and a first adhesive disposed on a bottom surface of the PET film. Refractive indices of the base layer and the one or more removable lens layers may be matched to within 0.2. Each layer of the protective lens stack, including the base layer and each of the removable lens layer(s), may have less than 0.5% haze. The protective lens stack may be used as a face shield or may be surface mountable using a second adhesive disposed on a bottom surface of the PET film containing the UV blocking additive.

The invention provides a transparent bulletproof ceramic composite structure with an electric heating function and a preparation method of the transparent bulletproof ceramic composite structure. The composite structure comprises an anti-splashing layer (1), a first middle layer film (2), a multi-layer stacked structure (3) of glass sheets and films, a first transition layer (4), an electric heating film layer (5), a second transition layer (6), a ceramic layer (7), a first antireflection film layer (8), a second antireflection film layer (9), a third antireflection film layer (10), a second middle layer film (11), an inorganic glass layer (12), a third transition layer (13) and an anti-static layer (14) which are arranged in sequence. The composite structure provided by the invention has excellent impact resistance and bulletproof grade, can effectively resist the damage of high-speed elastic sheets or impact objects, and meets the requirements of high-safety application scenes such as weapon armors, armed airplanes and high-speed trains; and the anti-static film has clear optical observation capability, high transmissivity and anti-static property.

The invention discloses a preparation method of a bidirectional auxetic honeycomb anti-explosion protection structure and a bending and welding integrated structure, and belongs to the technical field of metamaterial structure design. The structure comprises an upper panel and a lower panel, wherein a first bending plate, a second bending plate and a bending connecting plate are arranged between the upper panel and the lower panel; the first type of bending plates are symmetrically spliced and combined with the bending connecting plates to form concave hexagonal cell elements; the first bending plate and the second bending plate are spliced and combined to form a double-arrow cell element; the sandwich structure is formed by adopting concave hexagonal cell elements and double-arrow cell elements which are arranged at intervals in a crossed manner in the horizontal direction, and the adjacent double-arrow cell elements are symmetrical along the middle concave hexagonal cell element; and the second bending plates in the double-arrow cell elements are spliced with the concave parts of the first bending plates in the concave hexagonal cell elements. The structure combines two structural characteristics of the concave hexagonal honeycomb and the double-arrow honeycomb, has bidirectional negative Poisson's ratio performance and higher bidirectional bearing capacity, and has a higher capacity absorption effect when subjected to explosion impact.

The present disclosure describes articles that may be used in protective gear, including but not limited to body armor, helmets, shields, or barriers. These articles may include a polymeric material coated with nanoparticles, in a single layer or in multiple layers, which are treated to form a composite. The articles may further include a ceramic layer and / or a back-face layer. Such articles may be useful for protecting an object or wearer against projectiles.

The invention relates to the technical field of protection equipment, and discloses a spliced bulletproof plugboard and a preparation method thereof.The spliced bulletproof plugboard comprises a first aramid sheet layer, a ceramic plate layer, a second aramid sheet layer and a polyethylene plate layer which are sequentially arranged in the direction from a bullet facing face to a bullet backing face; the ceramic plate layer comprises a ceramic plate and a long fiber layer circumferentially wrapping the side face of the ceramic plate, and the ceramic plate is formed by bonding and splicing a plurality of ceramic blocks. According to the invention, the plurality of ceramic blocks are bonded and spliced into the ceramic plate, and meanwhile, the circumferential side edge of the ceramic plate is wrapped by the long fiber layer to form circumferential constraint, so that the constraint rigidity between the spliced ceramic blocks can be effectively improved, and further, the ceramic close to a striking point is effectively prevented from shifting or being separated from the adjacent layer; the multiple resistance and the side edge protection performance of the bulletproof inserting plate are improved, and deformation and sinking at the moment of bouncing are reduced.

The invention relates to the technical field of bulletproof materials, and discloses a lightweight composite material target plate and a preparation method thereof.The preparation method comprises the following preparation steps that epoxy resin, a curing agent, a silane coupling agent, composite boron carbide ceramic, a heat conduction additive and a solvent are mixed and stirred, and an epoxy resin binder is obtained; coating the upper and lower surfaces of a wood board with an epoxy resin binder to obtain wood board layers, and coating the upper and lower surfaces of quartz fiber cloth with the epoxy resin binder to obtain quartz fiber cloth layers; and the damping rubber plate, the wood plate layer, the PE plate, the quartz fiber cloth layer and the steel plate are stacked in sequence from top to bottom, and the composite material target plate is obtained through rolling and curing. Silicon carbide nanowires are formed in the boron carbide ceramic, crack propagation of the boron carbide ceramic is inhibited, the strength of the boron carbide ceramic is improved, and the bulletproof performance of the composite material target material is enhanced; the nano zinc oxide forms a concave-convex structure on the surface of the boron carbide ceramic, so that the strength of the boron carbide ceramic is enhanced, and the bulletproof performance of the composite target material is improved.

In one embodiment, a thin, lightweight, flexible, strong multi-layer barrier fabric is provided that offers extended breakthrough time against hazardous materials. The multi-layer barrier fabric is arranged as a layer stack that includes an inner layer of facing fabric, an adsorbent layer of adsorptive fabric, a barrier layer of low-permeability fabric and an outer layer of facing fabric. The facing fabric provides tensile strength. The adsorptive fabric and the low-permeability fabric interact synergistically. The barrier layer improves capture effectiveness of the adsorbent layer by both slowing down the hazardous material to increase its residence time in the adsorbent layer and decreasing the escape probability of stray molecules of hazardous material that are not initially intercepted by the adsorptive fabric. The adsorbent layer improves barrier effectiveness of the barrier layer by reducing the concentration of hazardous material challenging the low-permeability fabric of the barrier layer.

A multi-layer and multi-functional composite structure includes a structural reinforcing portion configured to provide structural support. The structural reinforcing portion includes reinforcing fibers consolidated in a thermoplastic resin. A protecting portion is arranged on one side of the structural reinforcing portion and configured to provide at least one of thermal blocking and fire resistance. A shielding portion is arranged on an opposite side of the structural reinforcing portion and configured to shield electromagnetic interference (EMI).

A cover for a seating and / or cargo area and doors of a vehicle includes front, middle and rear panels or portions. Door panels are attached to an upper portion of left and right sides of the front panel. Left and right front straps are spaced apart and attached to the front panel. Rear straps are attached to the rear panel. Window inserts are attachable to the left and right side door panels. For vehicles having fold-up seats, the cover may include a rear panel having independently foldable first, second, and optionally third sections attached by a zipper, and split seat top clips on opposite sides of the zipper. First and second top seats straps are attached on opposite sides of the rear panel. The fold-up seats, which may be split or un-split seats, may be folded up or down, without displacing or removing the cover.

A thermal runaway fireproof composite material. The thermal runaway fireproof composite material comprises a ceramic silicone rubber layer and a glass fiber cloth layer. The porosity of the composite material is less than or equal to 0.5 and greater than 0 after ablation at 800°C for 30 min, and the crosslinking degree of the ceramic silicone rubber layer is 2×10-4 to 2×10-2 mol / cm3. The thermal runaway fireproof composite material has good flexibility before burning by a high-temperature flame, and can be fully attached to a battery cell; in addition, a hard and compact ceramic layer can be formed after burning by the high-temperature flame, so that the thermal runaway fireproof composite material has good fireproofing performance.

Provided are methods of forming graphene laminate compositions and architectures. The method comprises: (i) contacting a graphene structure comprising one or more planar graphene sheets with a first interlayer material; (ii) depositing of a conductive material, where in the conductive material is deposited along an edge of the graphene and one end of the first interlayer; and (iii) contacting the graphene structure with a second interlayer material. Also provided are graphene laminates structures comprising doped graphene films having improved mechanical strength, electrical mobility and optical transparency.

The application relates to the field of chemical-proof fabrics, and particularly discloses a flame-retardant chemical-proof fabric and a preparation process thereof. The flame-retardant chemical-proof fabric comprises, from outside to inside, an outer layer, a bonding layer, a framework layer, a bonding layer and an inner layer which are sequentially contacted, the outer layer is a barrier layer, the inner layer is a barrier layer or an adsorption layer, the framework layer is selected from at least one of a composite fabric of aramid fiber / polyimide fiber, a basalt fiber cloth, a glass fiber cloth, a flame-retardant polyester cloth and a flame-retardant acrylic fiber cloth, the barrier layer is selected from at least one of a PVC / TPU composite film, a PVC film, a PTFE film, a PE film, silicone rubber, fluororubber, butyl rubber, chloroprene rubber and natural rubber, and the adsorption layer comprises a mixed fabric layer formed by nylon fiber and polyester fiber containing an adsorption material. The flame-retardant protective fabric has the advantages of high flame-retardant capacity, good chemical-proof effect, excellent puncture resistance and tensile resistance, can absorb moisture and sweat, and is comfortable to wear.

A composite material includes a plurality of polypropylene sheet layer unit groups that are sequentially stacked; each polypropylene sheet layer unit group comprises at least one of the same or different polypropylene sheet layer units, the structure of each polypropylene sheet layer unit is BiAiB′i; the structure of the polypropylene composite material is . . . i-th group, . . . second group, first group, second group, . . . i-th group, . . . ; the melting point of polypropylene composition Ai is greater than the melting point of polypropylene compositions Bi and B′i; and the average value of the melting points of all outer layers in the i-th group is greater than the average value of the melting points of all outer layers in an (i-1)th group. The polypropylene composite material has a very good tensile property and very good impact resistance, and also has good interlayer stripping strength at a relatively low hot-pressing temperature.

A web harness belt includes multiple layers. A first elastomer layer portion and a second elastomer portion each connected to a ballistic material layer of the multiple layers. The first elastomer layer portion and the second elastomer layer portion each including multiple belt configuration slots.

A protective headgear can include a core and two or more impact absorbing layers coupled to the core. At least one impact absorbing layer can include a number of impact absorbing components that are configured to absorb and reduce the force of impact incident on the protective headgear. The impact absorbing materials can employ cylindrical segments of viscoelastic foam with a sealed central void to absorb high energy impacts. The protective helmet can reduce the occurrence of concussions and subconcussive impacts to the brain.

The invention provides a bulletproof structure and a preparation process thereof. The bulletproof structure comprises a ceramic layer plate, a titanium alloy layer plate, an aramid fiber layer plate, an ultra-high molecular weight polyethylene layer plate and a honeycomb heterogeneous anti-impact layer which are sequentially stacked, the ceramic layer plate and the titanium alloy layer plate, the titanium alloy layer plate and the aramid fiber layer plate, and the aramid fiber layer plate and the ultra-high molecular weight polyethylene layer plate are connected through a large-surface-density polyurethane resin adhesive film; wherein the ceramic laminate is made of nano modified B4C ceramic or nano modified TiB2 ceramic. The impact resistance of the base body can be improved, incoming projectiles are partially eroded and decomposed in the residence stage of the ceramic plate, then a large number of cracks are formed on the surfaces, conical fracture failure is achieved, bullet energy is decomposed greatly, the projectiles are eroded to deform and break, high temperature of combustion of the projectiles is blocked, and the impact resistance of the ceramic plate is improved especially for large-momentum and high-invasion-force projectiles. The invention particularly relates to a 12.7 mm armor-piercing combustion bomb and a kinetic energy warhead below.

The invention relates to a knitted full-forming face protection product and a preparation method thereof, and belongs to the technical field of full-forming knitting. The knitted full-forming face protection product comprises a knitted full-forming mask, and the knitted full-forming mask comprises a first hanging rope part, a first light reflecting part, a mask face part, a mask ventilation part, a second light reflecting part, a nose wing protruding part and a second hanging rope part. The first hanging rope part, the first light reflecting part, the mask face part, the mask ventilation part, the second light reflecting part, the nose wing convex part and the second hanging rope part are integrally connected; and / or, the knitting fully-formed mask comprises a third hanging rope part, a mask lower jaw part, a third light reflecting part, a mask face part, a mask ventilation part, a fourth light reflecting part, a nose wing upheaval part, a mask forehead part and a fourth hanging rope part. The third hanging rope part, the mask lower jaw part, the third light reflecting part, the mask face part, the mask ventilation part, the fourth light reflecting part, the nose wing upheaval part, the mask forehead part and the fourth hanging rope part are integrally connected. According to the invention, masks or masks can be simply and efficiently produced.

The invention relates to a hot melt adhesive composition comprising a polymer component, the polymer component comprising at least one styrene-butadiene-styrene block copolymer P having a styrene content from 35 to 50% by weight: a styrene-butadiene diblock content from 50 to 80% by weight; and a viscosity of a 15% by weight toluene solution at 25° C. of 20 to 40 mPa·s, and at least one styrene block copolymer other than a styrene-butadiene-styrene block copolymer, wherein said styrene-butadiene-styrene block copolymer P is at a content from 10 to 40% by weight relative to the total weight of the polymer component. The invention also relates to the use of said composition as an adhesive for bonding two substrates, and to articles comprising at least one interior or exterior surface coated with said composition.

A defusing cell includes walls and spheroid elements. The walls are physically connected together to form a first perimeter, a second perimeter, and a hollow center region. A wall has a length and is an angle with respect to the first perimeter. The first perimeter is separated from the second perimeter by a distance based on the length and an angle of the wall. The second perimeter is larger than the first perimeter. The spheroid elements are arranged in a pattern to distribute and disperse an impact force impacting the defusing cell from the second perimeter with respect to the first perimeter.

The present invention relates to the technical field of fire-fighting composite fabrics, and discloses a processing technology for highly flame-retardant, high-temperature-resistant, and highly breathable firefighting suit protective fabrics. The outer layer of the firefighting suit protective fabric adopts a high-temperature flame-retardant layer fabric made of nitrogen-phosphorus composite flame-retardant fibers. Through the synergistic effect between the various components, a dense carbon layer can be formed when a fire occurs to delay combustion. Nano-silicon dioxide aerogel is added to the composite adhesive of the inner layer to further block heat transfer. A comfort layer fabric blended with menthol-modified bamboo fiber and spandex fiber is composited with the composite adhesive by spraying the adhesive in a diamond lattice. The fabric has uniform breathable pores, can bring a continuous cool feeling, is highly comfortable to wear, and effectively promotes sweat discharge. The prepared firefighting suit protective fabric has excellent flame retardancy, high-temperature resistance, and breathability, and can meet the use requirements in various environments.

The present invention provides an aramid fiber reinforced polyurea / epoxy matrix hybrid laminate and a preparation method and application thereof, and relates to the technical field of armor materials. The aramid fiber reinforced polyurea / epoxy matrix hybrid laminate provided by the present invention comprises a stacked aramid / polyurea mixed fiber board and an aramid / epoxy resin mixed fiber board; the aramid / polyurea mixed fiber board and the aramid / epoxy resin mixed fiber board are bonded by polyurea. Compared with the traditional aramid / epoxy resin mixed fiber board, the aramid fiber reinforced polyurea / epoxy matrix hybrid laminate provided by the present invention has both good stiffness and deformation ability, and can play a good protective effect.

The invention discloses an anti-puncture composite material and a preparation method thereof, and belongs to the technical field of anti-puncture composites.The two sides of a pre-coated carbon fiber cloth are coated with a composite adhesive, composite aerogel films are pasted on the two sides of the pre-coated carbon fiber cloth respectively, a layer of fabric is pasted through the coated composite adhesive after rolling compounding is conducted, rolling compounding is conducted again, and the anti-puncture composite material is obtained. And curing to obtain the anti-puncture composite material. The pre-coated carbon fiber cloth is impregnated with tetrapod-like nano zinc oxide whiskers and can play a role of barbing, the composite adhesive is added with flaky nano carbon nitride powder, compared with spherical filler, the composite adhesive is more easily limited by the tetrapod-like nano zinc oxide whiskers, slippage between the pre-coated carbon fiber cloth and the composite aerogel film is reduced, and the composite aerogel film is more durable. The puncture force can be better dispersed into the whole composite material, so that the anti-puncture performance is improved; the composite aerogel film mixed with the calcium phosphate particles can effectively disperse stress and prevent crack propagation, and the compression resistance and puncture resistance of the puncture-proof composite material can be improved.