39 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.

A polycarbonate composition suitable for thin-wall applications comprises: a linear homopolycarbonate; a poly(carbonate-siloxane) present in an amount effective to provide 0.1 to 10 wt % siloxane, based on the total weight of the composition, a linear polycarbonate having pendant ester groups in an amount effective to provide 0.1 to 5.0 mole % repeating units derived from C a monomer having a pendant ester group based on the total moles of the composition; and a flame retardant wherein a molded sample N of the composition has a UL-94 flame test rating of VO at a thickness of 1.5 mm.

The polycarbonate composition comprises a linear homopolycarbonate and an optional styrene-containing copolymer; a poly (carbonate-siloxane) comprising from about 10 wt% to less than about 30 wt% siloxane present in an amount effective to provide from about 1 to about 6 wt% siloxane based on the total weight of the composition; an ultra-high molecular weight polydimethylsiloxane present in an amount effective to provide from 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 composition have a UL94 burn test rating or V-0 at a thickness of 1.5 mm, exhibit anti-drip properties, and may be substantially halogen free, i.e., the polycarbonate composition includes about 900 parts per million (ppm) of each of chlorine, bromine, and optionally fluorine, and further includes a total chlorine, bromine, and fluorine content of about 1500 ppm or less.

The polycarbonate composition comprises a linear homopolycarbonate and, optionally, a styrene-containing copolymer; a poly (carbonate-siloxane) comprising from about 10 to less than about 30 wt% siloxane, present in an amount effective to provide from about 1 to about 6 wt% siloxane, based on the total weight of the composition; a poly (carbonate-siloxane) comprising from about 30 wt% to about 70 wt% siloxane 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. The molded sample may have a UL94 burn test rating or V-0 at one or both of 1.5 mm and 2.9 mm thicknesses, may exhibit anti-drip characteristics, and may be substantially halogen free, i.e., the polycarbonate composition may include about 900 ppm or less of each of chlorine, bromine, and optionally fluorine, and may also include about 1500 ppm or less of total chlorine, bromine, and fluorine.

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.

The utility model discloses a detachable open fire test device for a small-sized concrete test piece. Comprising a heat preservation box, a test piece supporting frame clamped above the heat preservation box, a small concrete test piece placed above the test piece supporting frame, a temperature measuring assembly electrically connected with the small concrete test piece, a fire source arranged in the heat preservation box and a transmission part arranged at the bottom and connected with the heat preservation box. By adopting the technical scheme of the utility model, the fire resistance of the small-sized concrete test piece can be researched, and the test device can be flexibly assembled and disassembled according to research requirements, so that the test convenience is greatly improved, the test cost is reduced, and the test safety is guaranteed.

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 present application relates to the technical field of polyimide films, in particular to a needle flame resistant polyimide film and a preparation method thereof. A needle flame resistant polyimide film comprises the following raw materials: diamine, dianhydride, flame retardant, inorganic filler, solvent; the flame retardant is at least one of phenoxyphosphazene flame retardant and diphenyl phosphate; the inorganic filler is at least one of silicon dioxide and aluminum oxide; by weight, the amount of the flame retardant is 5-15% of the total weight of dianhydride and diamine, and the amount of the inorganic filler is 3-15% of the total weight of dianhydride and diamine. The obtained polyimide film can achieve the effect of no perforation and no cracks after a 70s needle flame test; the limiting oxygen index can reach 48.6-64.2.

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 present invention provides a multiple-guarantee flare continuous combustion system, belonging to the technical field of flare combustion systems. The system includes a top protective cover, an outer flame cabin, an internal combustion cabin, a cabin partition, dual airways, dual flame color reaction strips, a diverter, a gas valve, a gas tank, and a multi-element installation stopper. A top protective cover is arranged on the top of the system, an outer flame cabin is arranged below the top protective cover, a cabin partition is arranged between the outer flame cabin and the internal combustion cabin, dual airways and dual flame color reaction strips are arranged in the upper part of the system, a gas tank is arranged in the lower part of the system, the gas tank is connected to the dual airways through a gas valve, and a diverter is arranged on the gas valve. The system can effectively prevent the problem of gas cut-off in the airway, the double helix structure can shield and ignite each other, and the dual flame color reaction strips enhance the visual effect of flame combustion.

The halogen-free flame-retardant PC / ABS alloy comprises PC resin, ABS resin, a flexibilizer, an antioxidant, a halogen-free flame retardant, a lubricant, a char forming accelerant and a dripping agent, and the dripping agent accounts for 0.03%-0.2% of the total weight of the PC resin, the ABS resin, the flexibilizer, the antioxidant, the halogen-free flame retardant, the lubricant, the char forming accelerant and the dripping agent. By adding the charring accelerant and a small amount of dripping agent, the halogen-free flame-retardant PC / ABS alloy not only can meet the flame retardant test of 1.6 mmV-0, but also can meet the needle flame test standard of GB4943.1-2022.

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 utility model belongs to the technical field of experiment teaching aids, and particularly relates to a flame reaction experiment device which is simple and convenient to operate. The flame reaction experimental device easy and convenient to operate comprises a base, the base comprises a fixed base and a rotating platform arranged on the fixed base, a sample groove is formed in the axis position of the rotating platform, a plurality of transparent baffles are arranged around the sample groove, the lower ends of the transparent baffles are fixed to the rotating platform, and the lower ends of the transparent baffles are fixed to the rotating platform. A gap is formed between every two adjacent baffles. According to the utility model, a specific wind tunnel device design is adopted, flame tornado is formed by 100%, the experiment difficulty is reduced, and classroom experiment display of teachers is facilitated. By adopting the flame reaction experimental device, the ornamental value of the flame reaction is enhanced through the formation of the flame tornado, and the interestingness is beneficial to motivating the learning enthusiasm of students.

The ignition device comprises an ignition needle and an insulator, the insulator wraps the bottom of the ignition needle, the top of the ignition needle is exposed out of the top face of the insulator, a through groove is formed in the side, away from an ignition hole, of the insulator, and the through groove is sunken downwards from the top of the insulator. And part of the ignition needle is exposed out of the insulator through the through groove. The through groove is formed in the side, away from the ignition hole, of the insulator, the area, exposed out of the insulator, of the ignition needle is increased, and the ignition success rate is increased by increasing the exposed area of the ignition needle. The ignition needle is arranged on the side away from the ignition hole, it is guaranteed that the exposed area of the ignition needle right facing the flame area is small, the area where flames directly act on the ignition needle is reduced, and therefore the service life of the ignition needle is prolonged, the needle is not prone to being burnt red, and flame reaction is avoided.

The utility model relates to the technical field of inspection and detection, in particular to a needle flame testing device for identifying flame height based on machine vision, and the machine vision is an identification technology for obtaining a target image through a camera and obtaining an identification result through database matching. Comprising a working chamber, a sample fixing mechanism, a needle flame mechanism and at least one camera, the sample fixing mechanism is arranged at a first position in the working chamber and can move towards a second position in the working chamber, and the needle flame mechanism is movably arranged at the second position; the at least one camera is arranged in the working chamber and used for acquiring a flame image generated by the needle flame mechanism. According to the utility model, the problems of low precision, low measurement speed and danger caused by manual measurement of flame height can be solved.

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 invention particularly relates to a cleaning and detecting method for a railway sticky oil tank truck, and solves the problem that the periphery of a manhole, the outer side of a tank body, the bottom in the tank, a heating sleeve or an inner heating pipe is difficult to thoroughly clean by an existing cleaning method for the railway sticky oil tank truck. And the detection method for the railway viscous oil tank truck is difficult to comprehensively detect the content of toxic and harmful gas and oxygen in the railway viscous oil tank truck. The method comprises the following steps that 1, the interior of the railway viscous oil tank truck and the interior of a heating device are cooked till viscous oil in the railway viscous oil tank truck is steamed to be soft and distilled, and clear condensate water flows out of a drainage pipe of the railway viscous oil tank truck; 2) flushing the exterior of the railway viscous oil tank truck; the method comprises the steps of (1) cleaning and detecting a railway viscous oil tank truck, (2) washing a residual oil zone at the bottom in the railway viscous oil tank truck, (4) carrying out three-dimensional washing on the inner wall of the railway viscous oil tank truck, (5) replacing mixed gas in the railway viscous oil tank truck, (6) carrying out an open fire test in the railway viscous oil tank truck, if no abnormal sound and no dense smoke exist, determining that the test is qualified and completing cleaning and detection of the railway viscous oil tank truck, and otherwise, returning to the step (1).

The utility model provides an improved range hood and a centrifugal fan and a volute thereof. The volute for the range hood comprises a first side wall (1), a second side wall (2) and an annular wall (3), and the annular wall (3) is arranged between the first side wall (1) and the second side wall (2) in a connected mode and comprises an electric heating film (4) and a cover plate (6); the cover plate (6) is arranged to be suitable for being fixed on the outer surface of the annular wall (3); when the cover plate (6) is fixed to the outer surface of the annular wall (3), the electrothermal film (4) is located between the cover plate (6) and the annular wall (3), and the electrothermal film (4) is extruded and fixed to the outer surface of the annular wall (3) through the cover plate (6). Therefore, the electrothermal film is fixed on the outer surface of the annular wall by virtue of the cover plate, so that the fixation of the electrothermal film does not excessively depend on mucilage glue, and the electrothermal film is easy to pass a needle flame test.