24 results about "Flame test" patented technology

The invention relates to the technical field of high polymer materials, and discloses a high-toughness halogen-free flame-retardant PC / ABS alloy and a preparation method thereof.The high-toughness halogen-free flame-retardant PC / ABS alloy is prepared by adding PC resin, ABS resin, a flexibilizer, an antioxidant, a halogen-free flame retardant, a lubricant and an anti-dripping agent accounting for 0.1%-0.2% of the total weight into a double-screw extruder, blending and extruding, the high-toughness halogen-free flame-retardant PC / ABS composite material is obtained. According to the halogen-free flame-retardant PC / ABS alloy disclosed by the invention, the halogen-free flame-retardant PC / ABS alloy not only can meet a 1.6 mmV-0 flame-retardant test, but also can meet a GB4943.1-2022 needle flame test standard by controlling different flowability of PC without additionally adding a PC charring accelerant and adding a small amount of anti-dripping agent.

The invention provides a high-needle-flame-resistance halogen-free PFAS-free flame-retardant polycarbonate composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. Through step-by-step addition of rare earth metal salt, calcination in a nitrogen-hydrogen mixed atmosphere and surface phosphorylation modification, rare earth elements are enriched on the surfaces of particles to form concentration gradient distribution, redox pairs and oxygen vacancy structures are generated, and P-O-rare earth bonds are formed. A 'P-Zn-Si' ternary synergistic flame-retardant system is constructed by the modified nano zinc borate, a phosphazene flame retardant and a silicon component, and a gradient ceramic-carbon layer barrier is quickly formed during combustion, so that a multi-stage protection mechanism is realized. According to the present invention, the product has characteristics of no PFAS addition and GB4943.1-2022 needle flame test (S.2 test) standard, during the needle flame test, the product is extinguished after the product is away from the fire, does not drop the burning cotton, has characteristics of high safety performance, no fluorine, safety, environmental protection, excellent chemical resistance, excellent weather resistance and excellent impact resistance.

This invention discloses a small-scale localized open flame test device and method for testing the fire resistance of cable protective materials. The device comprises a test furnace system, a cable model, and a temperature monitoring system. The test furnace system includes a test furnace, a fan subsystem, and a gas subsystem. The cable models include a steel drum cable model and a cable strand assembly cable model. The temperature monitoring system, a computer, and a controller work together to achieve real-time monitoring and control of the furnace temperature. This device can simulate the localized high-temperature exposure environment of bridge cables in real-world fire scenarios, allowing for rapid testing of the fire resistance of cable model protective materials. It features convenient operation, ease of movement, precise temperature control, compact size, and low gas consumption.

Polycarbonate composition having a low added fluorine content while also achieving a V-0 flame test rating at 1.5 mm, comprising a homo-polycarbonate composition having one or more homo-polycarbonates wherein the homo-polycarbonate composition has a weight average molecular weight of 25,000 to 2,000,000, a poly (carbonate-siloxane) and 0.01 to 1.0 wt% of a flame retardant. The molecular weight of the catalyst is greater than 10,000 g / mol A poly (carbonate-siloxane) having a siloxane content of from 30 to 70 wt%, present in an amount effective to provide 4.5 to 14 wt% of siloxane repeat units, based on the total weight of the composition, and having a weight average molecular weight of from 26,000 to 50,000 g / mol, and having less than 1 wt% of a poly (carbonate-siloxane) having a siloxane content of less than 30 wt%; the flame retardant includes an aromatic sulfonate inorganic salt, an aromatic sulfone sulfonate inorganic salt, or a combination thereof.

A polycarbonate composition comprises a linear homopolycarbonate and optionally, a styrene-containing copolymer; a poly(carbonate-siloxane) including about 10 to less than about 30 wt % siloxane, present in amount effective to provide about 1 to about 6 wt % siloxane, based on the total weight of the composition; a poly(carbonate-siloxane) having about 30 to about 70 wt %, present in an amount effective to provide greater than about 0.3 wt % siloxane, based on the total weight of the composition; a flame retardant; and optionally, an additive composition. Molded samples can have a UL94 flame test rating or V-0 at one or both of 1.5 mm and 2.9 mm thickness, can exhibit anti-drip properties, and can be essentially halogen-free, i.e., the polycarbonate compositions can include about 900 ppm or less of each of chlorine, bromine, and optionally fluorine and also can include about 1500 ppm or less of total chlorine, bromine, and fluorine.

The utility model discloses a rapid detection device for a counterfeit fertilizer. The rapid detection device comprises a base and a blue cobalt glass cover detachably connected with the base, a sample groove is formed in the base in the blue cobalt glass cover. According to the device disclosed by the utility model, the flame reaction principle of a compound is utilized, and the size, the stability and the color of flames during the flame reaction of the fertilizer are enhanced through the blue cobalt glass cover, so that the purpose of identifying the authenticity of the fertilizer is achieved. According to the utility model, the fire baking behavior in the traditional identification method is improved, so that the effects of quickly identifying and reducing the labor time are achieved. The device is simple in structure, easy to store, replace and clean, free of electronic elements, long in service life, convenient to operate and unlimited in use place, and loss of farmers and farmland pollution are reduced conveniently. The method has the advantages of moderate price, high universality, low operation difficulty, relatively high precision, small potential safety hazard and the like.

The invention relates to the technical field of scientific exhibits, in particular to a flame tornado device. The device comprises an annular combustion cell for storing fuel and a plasma wind module arranged on the periphery of the annular combustion cell and used for generating tornado. A material sprayer is coaxially arranged on the inner side of the annular combustion cell, the material sprayer comprises at least two nozzles which are circumferentially and uniformly distributed around the axis of the material sprayer, the nozzles are higher than the top of the annular combustion cell, the spraying directions of the nozzles are distributed in the radial direction of the annular combustion cell, and each nozzle is independently controlled and is used for spraying flame reaction media with the same or different flame reaction colors. The device is reasonable in structure and diversified in display effect, so that public science interests can be effectively stimulated, and the effect of enlightening science is finally achieved.

The invention discloses a laser direct structuring polycarbonate blend composition as well as preparation and application thereof, and the laser direct structuring polycarbonate blend composition mainly comprises the following components in percentage by weight: 40-70% of a polycarbonate blend and 0.5-5% of an organic silicon modifier, 5 to 20% of a polycarbonate-polysiloxane copolymer; 1 to 5% of polyketone; 1-10% of a flame retardant; 2-10% of an additive that can be activated by laser; 5-40% of an inorganic filler; and 0.5-5% of other additives. According to the invention, the problem that the laser direct structuring polycarbonate blend can simultaneously reach UL94 V0 vertical combustion and needle flame test S2 grade under the thin-wall condition is solved, and meanwhile, the material has excellent mechanical properties and good chemical plating effect.

The present invention provides a flame retardant coating applied to the PC substrate of a mobile phone, which comprises the following components: adhesion promoter A component, adhesion promoter B component, acrylic primer, curing agent, diluent, prefabricated flame retardant paste, flame retardant intermediate coat paint, flame retardant top coat paint and ultraviolet curable coating. The flame retardant coating for the PC substrate of the mobile phone shell prepared by the present invention passes the needle flame test of GB-T 5169.5, that is, after applying a flame to the mobile phone PC shell coated with the flame retardant coating for 120 seconds, no holes are generated on the mobile phone PC shell, greatly improving the safety and service life of the mobile phone.

The application discloses a small-scale visual hydrogen explosion monitoring system and a monitoring method, and belongs to the field of hydrogen explosion monitoring.The application comprises an explosion pipeline system, a gas distribution system, an ignition system, a test and data acquisition system.Through forming sodium chloride crystals in the pipeline, based on the flame color reaction of sodium, the invisible hydrogen flame in the ultraviolet wave stage is colored, further, the sodium lamp is used to deepen the flame color, the capture ability of a high-speed camera on the flame form and position is improved, the hydrogen flame propagation speed can be calculated more accurately, the relationship between the hydrogen flame form and the flame propagation speed is analyzed, and the propagation law of pressure and flame is quantitatively characterized; based on a semiconductor laser, the ignition and initiation at different positions in the pipeline can be realized by using the high-thermal-conductivity characteristics of copper, and the dynamic change characteristics of the bidirectional flame propagation with time are analyzed.The application can predict the space-time evolution law of hydrogen combustion and explosion in a confined space, and provide support for safety design, accident prevention and control and the like of hydrogen-related industries.

A polycarbonate composition comprises a linear homopolycarbonate and optionally, a styrene-containing copolymer; a poly(carbonate-siloxane) comprising about 10 wt % to less than about 30 wt % siloxane, present in amount effective to provide about 1 to about 6 wt % siloxane, based on the total weight of the composition; an ultra-high molecular weight poly dimethylsiloxane, present in an amount effective to provide greater than about 0.3 to less than about 0.9 wt % siloxane, based on the total weight of the composition; a flame retardant; and optionally, an additive composition. Molded samples of the polycarbonate compositions have a UL94 flame test rating or V-0 at a 1.5 mm thickness, exhibit anti-drip properties, and can be essentially halogen-free, i.e., the polycarbonate compositions include about 900 parts per million (ppm) or less of each of chlorine, bromine, and optionally fluorine and also include about 1500 ppm or less of total chlorine, bromine, and fluorine content.

To provide an insulation material that exhibits superior flame-retardant performance and heat-resistant performance.SOLUTION: An insulation material is provided, comprising a styrene-based resin foamed molded body satisfying the following (A) to (F): (A) containing a carbon-based radiant heat transfer suppressing agent having an average particle diameter of 1 to 15 μm; (B) containing a bromine-based flame retardant in an amount of more than 0 wt.% and 5.0 wt.% or less relative to 100 wt.% of a resin composition; (C) a first styrene-based resin having a constitutional unit derived from (meth)acrylic acid being contained in an amount of 60 wt.% or more relative to 100 wt.% of a base resin; (D) having flame retardancy of HF-1 or HF-2 in a UL94 flammability test; (E) having a dimensional change rate within ±2% after heating at 90°C for 168 hours; and (F) having an average cell diameter of 90 μm to 400 μm.SELECTED DRAWING: None

The invention discloses a burnthrough-resistant PC material meeting needle flame S.2 flame retardant requirements and a preparation method thereof. According to the total weight of 100 parts, the material composition comprises the following raw materials: 80-93.95 parts of PC resin; 0.05 to 1 part of a flame retardant; 5 to 15 parts of a flame retardant synergist; 0.5-2 parts of a functional filler; and 0.5-2 parts of other auxiliary agents. The prepared flame-retardant PC material can realize flame retardance V-0 (1.5 mm) and S.2 (1.5 mm) needle flame test, and meets the safety requirements of new national standard GB 4943.1-2022 on audio and video, information technology and communication technology equipment.

The utility model discloses a sample clamp for a needle flame test, which comprises a bracket (1) and a clamping assembly (2) suspended on the bracket (1), and is characterized in that the clamping assembly (2) comprises a connecting seat (21) connected to the bracket (1); the first end of the flexible arm (22) is connected with the connecting seat (21); and the clamping piece (23) is arranged at the second end of the flexible arm (22). Compared with the prior art, the sample clamp for the needle flame test can fix a sample in any direction.

The utility model discloses a test positioning system for a needle flame test, which comprises an experiment box body, and an experiment cavity is arranged on one side of the experiment box body. A workbench is arranged in the experiment cavity and comprises a first telescopic frame, a second telescopic frame, a needle flame test piece, a first positioning mechanism, a second positioning mechanism, a data collection module and an operation module. The infrared positioning device is installed on the side edge of the original needle flame burner device, and after the burner moves to the corresponding test position and meets the test distance, infrared induction automatically starts timing, so that the human influence factors in the test process are low, the test result is more accurate, the test process is recorded through the camera, and the test efficiency is improved. The combustion process of the experimental sample in the needle flame test can be slowly analyzed through playback, so that experimenters are liberated, and the experimenters do not need to stand outside the experimental box body frequently to record data.

The invention relates to a sample holder (1) for a test bench (2) comprising a support (3) having a housing (4) for receiving a sample (5) made of ceramic material including a thermal protection coating (6), a first face (7) of the support (3) and the thermal protection coating (6) being intended to be positioned opposite a heating device (8) of the test bench (2) to be heated by a flame (9) emitted by the heating device (8), wherein the sample holder (1) includes a thermal protection layer (10) positioned opposite the first face (7) of the support (3). Fig. 1.

The application discloses a propellant combustion flame test burner and test device under rotary overload condition. The test burner comprises a burner shell, a sealing cover arranged at one end of the burner shell, a ignition connecting rod arranged on the sealing cover, a propellant grain mounting table arranged in the burner, and an observation window arranged on the sidewall of the burner. The burner and a high overload resisting image acquisition device are installed on a rotary table to form a rotary combustion test device. During the test, the rotary table is rotated to reach a required overload value, the propellant grain is ignited, the high overload resisting photographic system is started to shoot, and original images of propellant combustion flame under rotary overload condition are obtained. The application is suitable for propellant combustion characteristic test and characterization under rotary overload condition.

The turbulent flame experimental device comprises a gas tank, combined plates arranged in the gas tank for separating the internal space of the gas tank, and baffles for closing the air inlet between two adjacent combined plates, each combined plate is composed of a partition plate and an arc plate which are fixedly connected as a whole, the side of the partition plate away from the arc plate is fixedly connected with the inner wall of the gas tank, the arc plates surround the combustion zone interval of the arc-shaped circular wall, the partition plate and the baffle are slidingly connected, the top and bottom of the gas tank are respectively fixedly provided with a top plate and a bottom plate, a rotating drum is movably connected in the gas tank, the rotating drum is used for blocking or connecting the air inlet and the combustion zone interval, the inside of the top plate is provided with a movable hole which is matched with the rotating drum so that the rotating drum is inserted into the gas tank through the movable hole, the rotating drum is rotatably connected with the bottom plate, the inside of the top plate is provided with a through hole which is matched with the baffle so that the baffle is inserted into the gas tank through the through hole, the top of the bottom plate is provided with a sliding groove which is matched with the baffle, and the bottom plate is provided with air holes around the periphery. The device can be used for turbulent flame test.

The utility model discloses a needle flame test device for sound-absorbing cotton. The needle flame test device for the sound-absorbing cotton comprises an ignition module, a quality inspection module and a clamping module, the ignition module is used for igniting the sound-absorbing cotton; the quality inspection module is located on the front side of the ignition module and used for identifying the states of the ignition module and the sound-absorbing cotton; the clamping module is located on the rear side of the ignition module and used for clamping sound-absorbing cotton. The clamping module comprises a lifting assembly and a clamp arranged on the lifting assembly. The lifting assembly drives the clamp to move up and down. The clamping module is connected with an external computer through a network cable; compared with the prior art, the position between flame and a sound-absorbing cotton sample can be adjusted in the detection process, so that the sound-absorbing cotton sample is completely combusted within specified time.

The invention relates to the technical field of polycarbonate, in particular to a polycarbonate molding composition. The flame-retardant polycarbonate composition comprises the following components in percentage by weight: 5-35% of polycarbonate-siloxane copolymer, 0.1-2% of flame retardant and the balance of bisphenol A polycarbonate homopolymer. The total halogen content of the composition is less than 50 ppm, and the fluorine element content is less than 1 ppm. The notched cantilever impact strength is greater than 800J / m; the light transmittance of the 2mm molding composition is greater than 70%; the needle flame test meets the test standard of 120s.

The invention discloses a display shell capable of generating a purple smoke effect, which comprises a spherical shell body filled with an explosive and an effect powder and a paper cup seat loaded with a propellant powder, the paper cup seat is provided with an ignition lead for igniting the propellant powder, and the spherical shell body and the paper cup seat are connected with the propellant powder and the explosive through a blasting fuse; the center of an inner cavity of the spherical bomb body is provided with the explosive, and the inner cavity of the spherical bomb body is filled with the effect powder around the explosive. According to the purple smoke display shell, through three-medicine collaborative design and multi-mechanism color development, high color rendering property and good stability are achieved when the purple smoke display shell is set off at night. Through combination of organic dye color development and metal combustion brightening, dependence of traditional flame reaction on metal ions is broken through.

A turbulent flame device includes a gas box (1), a combination plate disposed inside the gas box to separate its internal space, and a baffle (8) for sealing the air inlet between two adjacent combination plates. Each combination plate consists of a partition plate (2) and an arc plate (3) fixedly connected as one piece. The side of the partition plate (2) facing away from the arc plate (3) is fixedly connected to the inner wall of the gas box (1). The partition plate (2) and the baffle (8) are slidably connected. A top plate (4) and a bottom plate (5) are fixedly connected to the top and bottom of the gas box (1), respectively. The combination plate can be fixed inside the gas box (1). A rotating cylinder (6) is also movably connected inside the gas box (1), and the top plate (4) has an opening for connecting with the rotating cylinder. The rotating cylinder (6) is adapted to the movable hole (7) of the gas box (1) through which it is inserted. The rotating cylinder (6) is rotatably connected to the bottom plate (5). The top plate (4) has a through hole (9) adapted to the baffle (8) through which it is inserted into the gas box (1). The bottom plate (5) has a sliding groove (10) adapted to the baffle (8) on the top. The bottom plate (5) has ventilation holes (11) on all four sides. There are four ventilation holes (11) in total, and they are all connected to the inside of the gas box (1). Through this device, turbulent flame tests can be carried out, and the effects and influences of inert gas and halogenated hydrocarbon gas on turbulent flames can be dynamically observed.

A white polycarbonate composition having a low fluorine addition content while also reaching V-0 flame test rating at 1.5 mm or less includes: a homopolycarbonate having a weight average molecular weight of 25,000 g / mol or more, the weight average molecular weight being calculated using a polystyrene standard and for polycarbonate; and a poly (carbonate-siloxane) having a siloxane content of 30-70 wt%, present in an amount effective to provide 3-20 wt% of siloxane repeat units, based on the total weight of the composition, and having a weight average molecular weight of 26,000-50,000 g / mol as determined by gel permeation chromatography using a polystyrene standard and calculated for polycarbonate; a flame retardant; a colorant composition comprising titanium dioxide; and optionally, an additive composition; wherein the polycarbonate composition comprises 1200 ppm or less of fluorine added to the total composition.

This utility model relates to the field of scientific exhibits, specifically a flame tornado device. The utility model includes an annular combustion pool for storing fuel and a plasma wind module arranged around the outer periphery of the annular combustion pool to generate a tornado. A sprayer is coaxially arranged inside the annular combustion pool, each sprayer including at least two nozzles evenly distributed around its axis, with the nozzles higher than the top of the annular combustion pool. The spray direction of the nozzles is radially distributed along the annular combustion pool, and each nozzle is independently controlled and used to spray flame reaction media with the same or different flame reaction colors. This utility model has a reasonable structure and diverse display effects, thereby effectively stimulating public scientific interest and ultimately achieving the effect of enlightening science.