17results about How to "Guaranteed flame retardant performance" patented technology

The present application relates to the technical field of thermally conductive insulating plastics, in particular to a graphene-modified high thermal conductive plastic and a preparation method thereof. A graphene-modified high thermal conductive plastic is mainly prepared from a nylon matrix resin, a graphene-modified polyaniline resin, a surface-modified aramid fiber, and a nano-high thermal conductive insulating filler; the mass of the surface-modified aramid fiber accounts for 6-8% of the total mass of the high thermal conductive plastic; the mass of the nano-high thermal conductive insulating filler accounts for 24-28% of the total mass of the high thermal conductive plastic; the mass of the graphene-modified polyaniline resin accounts for 28-36% of the total mass of the high thermal conductive plastic; the nylon matrix resin is composed of PA66 and PA612 in a mass ratio of (6-8): (2-4). The high thermal conductive plastic prepared in the present application not only has good thermal conductivity and heat dissipation, but also has good mechanical properties, flame retardancy and anti-electrical breakdown insulation safety, and is suitable for the field of shell materials for thermal runaway protection of power batteries.

The invention relates to the technical field of flame-retardant nylon materials, and provides a halogen-free flame-retardant nylon material and a preparation method thereof, the halogen-free flame-retardant nylon material comprises the following components by mass: 80-120 parts of nylon, 30-40 parts of modified polyacrylate, 1-10 parts of modified nylon, 20-40 parts of a halogen-free flame retardant, and 0.1-5 parts of an auxiliary agent; the modified polyacrylate is a copolymer of phosphorus pentoxide, hydroxyl acrylate, acrylic acid, acrylate, glass fiber and antimony trioxide; the modified nylon is a copolymer of nylon and acrylate. The components have good affinity, a uniform and stable mixed system can be formed, the mechanical strength and flame retardant property of the nylon composite material can be obviously improved by introducing the components, the product is endowed with more excellent comprehensive performance, harm to the environment and human bodies can be avoided, the ecological friendliness is higher, and the nylon composite material is suitable for industrial production. The problems existing in the prior art are solved, and the method has important significance on development and further popularization of nylon products.

The invention relates to the technical field of composite films, in particular to a flame-retardant composite film and a preparation method thereof. The composite film is of an ABA type symmetrical three-layer co-extrusion structure, and functional division and synergistic interaction are achieved by concentrating a main flame-retardant function on a core layer (B layer) and distributing hydrolysis resistance and mechanical enhancement functions on a surface layer (A layer). The layer A comprises crystalline polyester, reinforcing master batch and an interface reinforcing agent; the layer B comprises crystalline polyester and composite flame-retardant master batch; the preparation method mainly comprises the following steps: respectively preparing the reinforced master batch and the composite flame-retardant master batch; respectively mixing the raw materials of the layer A and the layer B, drying and melting; co-extruding and casting through a three-layer co-extrusion die head with gradient temperature field control, and quenching a cast sheet; and preheating the cast sheet, and then carrying out synchronous two-way stretching, heat setting and cooling rolling. The film prepared by the invention has excellent halogen-free flame retardance, outstanding damp-heat aging resistance and high mechanical strength, and is suitable for the field with strict requirements on safety and durability.

The invention relates to the technical field of halogen-free phosphorus flame-retardant materials, in particular to a halogen-free phosphorus flame-retardant epoxy resin composition and application thereof in a high-heat-resistance copper-clad plate, and the halogen-free phosphorus flame-retardant epoxy resin composition comprises the following raw materials: novolac epoxy resin, a flame retardant, 2-ethyl-4-methylimidazole, a curing agent, fused silicon dioxide and flaky boron nitride. According to the flame retardant, a polyether amine flexible chain segment in a molecular structure of the flame retardant is compatible with an epoxy resin matrix, so that the possibility of phase separation and interface defects is reduced, and the mechanical property level of an epoxy resin cured product is favorably maintained while the flame retardant property is ensured; the epoxy group at the tail end enables the flame retardant to participate in a curing reaction, and is anchored in an epoxy three-dimensional network through a covalent bond, so that the risk of migration and precipitation of the flame retardant is reduced, and the durability and stability of the flame retardant property are ensured.

This invention discloses a fire-retardant substrate containing biomass fibers, an integrated fireproof door core, and its preparation method, belonging to the field of fireproof doors. The fireproof substrate of this invention introduces cellulose fibers into the adhesive layer of an inorganic filler matrix system of magnesium sulfate, magnesium hydroxide, and calcium hydroxide, and incorporates a specific styrene-acrylate copolymer. Simultaneously, the length of the cellulose fibers and the two key inorganic fillers, magnesium sulfate and magnesium hydroxide, are controlled, allowing the three to form a synergistic compatibility and cross-linking effect in the adhesive layer. This effectively optimizes the distribution of the overall components in the adhesive layer. While ensuring the interlayer bonding and flame-retardant performance of the resulting product, the waterproof effect of the adhesive layer is significantly improved without the need for waterproofing or water-absorbing agents. The fireproof substrate has good interlayer connectivity, high regularity, and strong durability. The product does not experience significant performance degradation even after long-term storage or in humid environments.

The application is a kind of precise forming method for printing magnesium alloy castings by gradient mixing of flame retardant in freeze casting. First, the components of the flame retardant are proportioned, then the shape and layer thickness of the high flame retardant and low flame retardant sand layer in the gradient sand mold are designed according to the structure characteristics of the typical magnesium alloy castings to be poured, and at the same time, the protection gas pipeline is designed in the low flame retardant sand layer combined with the structure of the castings. Subsequently, the control system sprays water binder onto the laid sand powder bed, layer by layer, to complete the preparation of the gradient sand mold. The printed gradient sand mold is frozen, and before pouring, SF6+CO2 protection gas is introduced through the reserved vent pipe, and after a period of aeration, low-temperature pouring is carried out to obtain magnesium alloy castings. The application can reduce the use of flame retardant, prevent explosion reaction with water vapor, reduce production cost, make the freeze casting technology play a role in the production of complex magnesium alloy castings, and meet the development requirements of green casting.

The utility model provides a compacted strand process steel wire rope, which is characterized in that the periphery of the outer-layer steel wire of the central strand is provided with a concave steel wire cambered surface, and the inner-layer strand is tightly twisted on the steel wire cambered surface, so that the steel wire rope can be more tightly twisted, the torsion resistance of the steel wire rope is improved, the steel wire rope can be kept stable under a high-load condition, and the service life of the steel wire rope is prolonged. The risks of loosening and deformation of the steel wire rope are reduced; gaps between the inner-layer strands and the polyamide resin layer are filled with the triangular strands, so that combination in the steel wire rope strands is tighter, the strength of the steel wire rope is guaranteed, the oil storage strands are arranged, grease can infiltrate among the strands of the steel wire rope in the using process, abrasion and corrosion of the steel wire rope can be effectively reduced, and therefore the service life of the steel wire rope is prolonged. Meanwhile, the arrangement of the polyamide resin layer, the protective net layer and the wear-resistant layer also ensures the flame retardance, corrosion resistance and wear resistance of the steel wire rope. Therefore, the design structure is compact, the torsion resistance is excellent, the service life is prolonged, and the structural stability, safety and reliability are achieved.

This invention discloses an anti-aging power metering box cabinet material, relating to the field of organic materials technology. The anti-aging power metering box cabinet material comprises the following raw materials by weight percentage: 25%-35% unsaturated polyester resin, 11%-15% low-shrinkage agent, 0.5%-2% initiator, 2.5-8% additives, 35%-50% organic composite filler, and 15%-25% modified chopped glass fiber. This application adds the prepared modified chopped glass fiber to the unsaturated polyester resin, along with the remaining additives required for preparing the electrical cabinet material, to obtain the cabinet material for use in power metering boxes. The power metering box cabinet material prepared in this application has advantages such as excellent mechanical properties, stable environmental aging resistance, low dielectric loss, and low dielectric constant.

The utility model belongs to the technical field of cases and cabinets, and particularly relates to a case and cabinet convenient to assemble and transport, which comprises a bottom frame, folding plates are mounted on the left side and the right side of the bottom frame, retaining doors are mounted on the front side and the rear side of the bottom frame, hinges are mounted on the bottom edges and the top edges of the folding plates, the hinges on the top edges are connected with a top frame, and the top frame is connected with the folding plates. A hinge on the bottom edge is connected to the bottom frame, a locking hinge is installed in the middle of the folding plate, the folding plate comprises a first frame and a box plate, the bottom frame and the top frame are the same devices, the box plate is a double-layer sandwich plate and comprises an inner lining plate and an anti-collision plate, compression springs are installed between the four corners of the inner lining plate and the four corners of the anti-collision plate, and the inner lining plate and the anti-collision plate are hinged to each other. Heat insulation cotton is installed between the inner lining plate and the anti-collision plate, the inner lining plate and the anti-collision plate are flame-retardant macromolecule polyethylene plates, the blocking door comprises a second frame and a maintenance door, rotating shafts are arranged on the left side and the right side of the bottom edge of the second frame, and the device is simple in structure and convenient to use.

The invention discloses a preparation method of flame-retardant leather for vehicles, which comprises the following steps: S1, preparation of bridged organic silicon sol: stirring a bridged organic silicon precursor, water and inorganic acid in an organic solvent to carry out hydrolytic polymerization reaction so as to prepare the bridged organic silicon sol, and then carrying out post-treatment dehydration on the bridged organic silicon sol for later use; wherein the bridged organic silicon precursor is selected from a silsesquioxane precursor with a carbon-hydrogen bridged structure; s2, preparation of flame-retardant polyurethane coating paste: stirring and mixing the bridging organic silica sol, the brominated flame retardant and the antimony-containing flame retardant which are used for later use in the polyurethane coating paste, so as to prepare the flame-retardant polyurethane coating paste; s3, preparation of the flame-retardant leather for the vehicle: pretreatment of base cloth: soaking the base cloth in the impregnation liquid, taking out the base cloth, extruding the base cloth, and ironing the base cloth; the pretreated base cloth is coated with the flame-retardant polyurethane coating paste, standing is carried out, then solidification is carried out in solidification liquid, water washing, extrusion and drying are carried out, and the flame-retardant leather for the vehicle is prepared.

The application discloses a kind of A class flame-retardant polyethylene cable material, by the following weight parts component composition: melt flow rate is 3~8g / 10min high density polyethylene resin 100 parts, linear low density polyethylene resin 35~55 parts, maleic anhydride graft ethylene vinyl acetate 5~15 parts, carbon black 3~5 parts, aluminum hydroxide 50~60 parts, magnesium hydroxide 10~30 parts, phosphorus-nitrogen flame retardant 2~8 parts, metal soap lubricant 3~6 parts, antioxidant 0.5~2 parts, diisononyl phthalate 1~5 parts, lauryl acrylate 2~5 parts, hyperbranched polyethylene imine 1~3 parts.The A class flame-retardant polyethylene cable material of the application guarantees flame-retardant performance at the same time, prolongs flame-retardant polyethylene environmental stress cracking time, exceeds 260 hours, so that the flame-retardant polyethylene cable material forms cable sheath, has better environmental stress cracking resistance performance.

The utility model discloses flame-retardant gridding cloth shaping equipment, which relates to the technical field of flame-retardant gridding cloth processing and comprises a worktable, a base welded on the outer wall of the top of the worktable, a cloth conveying mechanism, a cloth heat shaping mechanism and a cloth cooling mechanism. The cloth heat setting mechanism comprises a first heat setting assembly and a second heat setting assembly which are symmetrically distributed up and down, and a controller is fixedly installed on the outer wall of the back face of the machine base. According to the cloth heat setting mechanism provided by the utility model, on one hand, heat setting treatment can be simultaneously carried out on the two surfaces of the flame-retardant gridding cloth through the electric heating upper setting roller and the electric heating lower setting roller which are symmetrically arranged up and down; and on the other hand, the distance between the electric heating lower shaping roller and the electric heating upper shaping roller can be flexibly adjusted, so that in the heat shaping process, the tension degree of the flame-retardant gridding cloth can be flexibly adjusted according to different shaping conditions, and the shaping effect of the flame-retardant gridding cloth can be improved.

The invention discloses a novel flame-retardant conveying belt and a preparation method thereof, and relates to the technical field of conveying belts. The device comprises a U-shaped base, one end of the U-shaped base is rotationally connected with a driving roller, the other end of the U-shaped base is rotationally connected with a driven roller, the periphery of the driving roller and the periphery of the driven roller are sleeved with a conveying belt, the interior of the U-shaped base is rotationally connected with a hollow heat exchange roller, and the interior of the U-shaped base is symmetrically and rotationally connected with laminating rollers; one end of the conveying belt penetrates through the position between the hollow heat exchange roller and the attaching roller, and the interior of the hollow heat exchange roller is fixedly connected with a spiral drainage ring. The driving assembly is started to drive one end of the conveying belt to circularly move with the driving roller and the driven roller as fulcrums, and when the end of the conveying belt penetrates through the space between the hollow heat exchange roller and the attaching roller, the sucking pump is started to be matched with the first gas guide pipe to drive nitrogen to penetrate through the hollow heat exchange roller, and then the nitrogen is guided into the drainage gas collection tank through the second gas guide pipe to be collected; therefore, one end of the conveying belt and nitrogen penetrating through the interior of the hollow heat exchange roller form heat exchange cooling.

The invention discloses a flame-retardant polycarbonate film / sheet and a preparation method thereof, and belongs to the field of high polymer material preparation. The material comprises the following components in parts by weight: 25-89 parts of bisphenol A polycarbonate, 3-15 parts of silicon copolymerized polycarbonate, 5-20 parts of high-temperature polycarbonate, 2-20 parts of a flame retardant, 1-10 parts of a toughening agent and 0-10 parts of other auxiliaries, the high-temperature polycarbonate is obtained by introducing a biphenyl group into bisphenol A polycarbonate. The preparation method comprises the following steps: mixing all the components, carrying out melt extrusion by using a twin-screw extruder at the temperature of 190-320 DEG C to obtain particles, drying the particles at the temperature of 80-125 DEG C, carrying out tape casting extrusion by using a tape casting extruder at the temperature of 190-320 DEG C, cooling on a cold roller at the temperature of 60-150 DEG C, and casting to obtain the flame-retardant polycarbonate film / sheet with the thickness of 25-2000 microns. The product does not contain PFAS substances, accords with the development direction of environmental protection, has the flame retardant property reaching VUL94 V-0 / VTM-0, and can be widely applied to the fields of electronics, electricity, new energy and the like.

The application belongs to the technical field of high polymer materials, and discloses a flame-retardant hydrophobic copolymer nylon material, a preparation method and application thereof. A low steric hindrance short-chain perfluoroalkyl hydrophobic unit (modified with heptafluoro) and a DOPO flame-retardant unit are integrated in a single caprolactam monomer and embedded in a polymer main chain, so that a hydrophobic barrier is constructed to protect the flame-retardant structure from hydrolysis, a stable mechanism of synergistic enhancement of the two is constructed, and a technical bottleneck that the prior art cannot guarantee long-term safety and reliability of the material under high-humidity harsh environment at the same time is overcome.

This invention belongs to the technical field of flame-retardant polyether polyols and their preparation, specifically relating to a method for preparing a highly flame-retardant phosphazene-based polyether polyol. The method involves a nucleophilic substitution reaction between hexachlorocyclotriphosphazene and water in the presence of an acid-binding agent, generating a polyhydroxyl-containing phosphazene derivative as an initiator. Using this initiator as the core, other small-molecule polyols are combined, and propylene oxide undergoes ring-opening polymerization under the action of a catalyst to form a polyether polyol with a "phosphazene ring-polyether chain" structure. Due to the presence of the phosphazene ring in the molecule, this product possesses both excellent flame-retardant properties and good reactivity, and can be directly used to synthesize flame-retardant rigid polyurethane foams, elastomers, and other materials, solving the problem of requiring additional flame retardants in traditional polyether polyols. This invention features highly controllable processes, readily available raw materials, and a product with excellent comprehensive performance, making it highly valuable for industrial applications.

The invention discloses a composite fireproof furniture board and a preparation method thereof, belonging to the technical field of fireproof furniture boards. A first layer of isocyanate glue is coated on both sides of a spliced ​​sandwich wood board, and flame retardant films are respectively pasted thereon, and then a second layer of isocyanate glue is coated on the flame retardant films on both sides, and melamine decorative paper is respectively pasted thereon, and the composite fireproof furniture board is obtained by rolling and compounding; a gel material is prepared to make the composite flame retardant powder evenly dispersed, and the pressed flame retardant film is thin, which is conducive to composite application in furniture boards. The expanded graphite in the composite flame retardant powder can be over-expanded to isolate the fire source, and the magnesium carbonate also has a flame retardant effect. The phosphorus-based flame retardant can form a continuous and dense carbon layer with organic matter. The original mesh structure of the gel material can make the integrity of the flame retardant film better, so that the flame retardant film forms a stable flame retardant network after combustion, and prevents the expanded flame retardant layer from peeling off, thereby playing an effective fire prevention role.