CN113912465A - Moisture-proof and waterproof thermosensitive wire and preparation method thereof - Google Patents
Moisture-proof and waterproof thermosensitive wire and preparation method thereof Download PDFInfo
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- CN113912465A CN113912465A CN202111199546.0A CN202111199546A CN113912465A CN 113912465 A CN113912465 A CN 113912465A CN 202111199546 A CN202111199546 A CN 202111199546A CN 113912465 A CN113912465 A CN 113912465A
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/001—Fillers, gelling and thickening agents (e.g. fibres), absorbents for nitroglycerine
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/002—Sensitisers or density reducing agents, foam stabilisers, crystal habit modifiers
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/007—Ballistic modifiers, burning rate catalysts, burning rate depressing agents, e.g. for gas generating
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
- C06B29/04—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with an inorganic non-explosive or an inorganic non-thermic component
- C06B29/06—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with an inorganic non-explosive or an inorganic non-thermic component the component being a cyanide; the component being an oxide of iron, chromium or manganese
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
- C06B29/12—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with carbon or sulfur
Abstract
The invention provides a moisture-proof and waterproof thermosensitive wire and a preparation method thereof, and relates to the technical field of fire fighting. A damp-proof and waterproof thermosensitive wire comprises a thermosensitive flux core, a sleeve, a connecting terminal and a sleeve head, wherein the sleeve is sleeved on the outer side of the thermosensitive flux core, one end of the thermosensitive flux core is connected with the connecting terminal, and the sleeve head is sleeved on the outer side of the connecting terminal; the thermosensitive drug core comprises the following raw materials in parts by weight: 75-85 parts of temperature sensing agent, 8-15 parts of oxidant, 1-2 parts of stabilizer, 4-6 parts of plasticizer, 2-4 parts of defoaming agent, 6-10 parts of catalytic regulator and 150-170 parts of solvent. The thermosensitive wire prepared by the invention can be stably started and used for transmitting fire at 160 +/-15 ℃, has good moisture-proof and waterproof performances, and the thermosensitive flux core has flexibility and can be randomly bent without being broken, so that the starting and fire transmitting performances of the whole set of fire extinguishing device are further improved.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a moisture-proof and waterproof thermosensitive wire and a preparation method thereof.
Background
The traditional thermosensitive wire is a general product of an automatic fire extinguishing device in the fire-fighting industry, a plurality of drug cores are coated with a layer of PE plastic for moisture and water proofing, the thermosensitive wire needs to be subjected to water cooling treatment through a water tank in the actual production process, and if accidental material leakage occurs in the process of coating a PE outer skin, the phenomenon of flameout and fire break occurs in the use process of the thermosensitive wire due to water immersion in the cooling process of the thermosensitive wire, so that the fire extinguishing device cannot be normally started; the normally qualified thermosensitive wires are easy to damp and cannot be started normally even in some special humid environments for a long time; the traditional thermosensitive wire sleeve waterproof sleeve has the advantages that the temperature-sensitive starting sensitivity is reduced, sparks splash all around after ignition when the traditional thermosensitive wire sleeve waterproof sleeve is directly used, high-temperature residue particles splash uncontrollably and cannot be completely combusted, and the PE sheath residue after combustion is easy to generate open fire and cause secondary disasters.
Disclosure of Invention
The invention aims to provide a moisture-proof and waterproof thermosensitive wire which has the characteristics of moisture resistance, water resistance, quick and stable starting, fire transmission and difficulty in breaking.
The invention also aims to provide a preparation method of the moisture-proof and waterproof thermosensitive wire, which is simple and convenient and can be used for preparing the thermosensitive wire with good quality.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
On one hand, the damp-proof and waterproof thermal wire comprises a thermal-sensitive flux core, a sleeve, a connecting terminal and a sleeve head, wherein the sleeve is wrapped on the outer side of the thermal-sensitive flux core;
the thermosensitive flux core comprises the following raw materials in parts by weight: 75-85 parts of temperature sensing agent, 8-15 parts of oxidant, 1-2 parts of stabilizer, 4-6 parts of plasticizer, 2-4 parts of defoaming agent, 6-10 parts of catalytic regulator and 150-170 parts of solvent.
On the other hand, the embodiment of the application provides a preparation method of a moisture-proof and waterproof thermosensitive wire, which comprises the following steps:
mixing a temperature sensing agent, a stabilizing agent and a solvent to obtain a dissolved solution;
mixing oxidant and catalytic regulator, and sieving to obtain powder;
mixing the dissolved solution and the powder, adding a plasticizer and a defoaming agent, and stirring to obtain a mixture;
extruding the mixture into strip leads, and drying to obtain the thermosensitive drug core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
the heat-sensitive wire is formed by wrapping a sleeve outside one or more moisture-proof and waterproof heat-sensitive medicine cores, one end of the heat-sensitive wire is pressed and fixed by a connecting terminal and then protected by a sleeve head, the other end of the heat-sensitive wire is connected with an automatic fire extinguishing device started by a gas generating agent, and the heat-sensitive wire is reliably ignited within 5 seconds under the action of flame or can be ignited by spontaneous combustion when the ambient temperature reaches 160 +/-15 ℃ in standard atmosphere. The thermosensitive flux core is a core wire formed by mixing and pressing materials such as a temperature sensing agent, an oxidizing agent, a stabilizing agent, a plasticizer, a defoaming agent, a catalytic regulator and the like, and the excellent thermosensitive temperature sensing material is adopted, so that the hot start temperature is more stable, and the thermosensitive flux core can stably transfer fire even if the sleeve is internally provided with less than 10 cm. The heat-sensitive flux core can be immediately ignited after being soaked in water for 24 hours, or spontaneously ignited after reaching the starting temperature, has good moisture-proof and waterproof performances, does not need to be coated with any waterproof material, does not have cotton yarn auxiliary support in raw materials, ensures that the flame is small when the heat-sensitive flux core is combusted, only generates a small amount of smoke in the combustion process, does not have residues after being combusted, does not cause the hidden danger of secondary disasters, and is an environment-friendly heat-sensitive wire.
The plasticizer is added into the raw materials of the thermosensitive flux core, so that the structure of the whole thermosensitive flux core is more compact, the plasticizer and the temperature sensing agent act together, the stability of the hot start temperature can be improved, the effects of quick and stable start and fire transfer are achieved, meanwhile, the plasticizer can increase the flexibility of the thermosensitive flux core, and the thermosensitive flux core can be bent randomly and is not easy to break, so that the start fire transfer performance of the whole set of fire extinguishing device is improved.
In addition, the preparation method is simple and convenient, and the thermosensitive wire prepared by the invention can be used only by mixing, pressing and drying the thermosensitive drug core, wrapping a sleeve outside the thermosensitive drug core, pressing and fixing one end of the sleeve by using a connecting terminal and then protecting the sleeve by using a sleeve head, and connecting the other end of the sleeve with an automatic fire extinguishing device inspired by gas producing agent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.
The embodiment of the invention provides a damp-proof and waterproof thermosensitive wire which comprises a thermosensitive flux core, a sleeve, a connecting terminal and a sleeve head, wherein the sleeve is wrapped on the outer side of the thermosensitive flux core; the thermosensitive flux core comprises the following raw materials in parts by weight: 75-85 parts of temperature sensing agent, 8-15 parts of oxidant, 1-2 parts of stabilizer, 4-6 parts of plasticizer, 2-4 parts of defoaming agent, 6-10 parts of catalytic regulator and 150-170 parts of solvent.
In the above embodiment, the heat-sensitive wire is formed by wrapping a sleeve outside one or more moisture-proof and waterproof heat-sensitive medicine cores, one end of the heat-sensitive wire is pressed and fixed by a connecting terminal and then protected by a sleeve head, the other end of the heat-sensitive wire is connected with an automatic fire extinguishing device started by a gas generating agent, the heat-sensitive wire is reliably ignited within 5 seconds under the action of flame, or the heat-sensitive wire can be ignited by spontaneous combustion when the ambient temperature reaches 160 +/-15 ℃ in standard atmosphere. The thermosensitive flux core is a core wire formed by mixing and pressing materials such as a temperature sensing agent, an oxidizing agent, a stabilizing agent, a plasticizer, a defoaming agent, a catalytic regulator and the like, and adopts an excellent thermosensitive temperature sensing material, so that the hot start temperature is more stable, the thermosensitive flux core is arranged in the sleeve within 10cm, fire can be stably transmitted, and the phenomena of flameout and fire break under extreme conditions in the use process of the thermosensitive wire can be avoided. Meanwhile, the waterproof thermal-sensitive wire has excellent moisture resistance and waterproofness, can be immediately ignited after being soaked in water for 24 hours, or can be spontaneously ignited after reaching the starting temperature, so that the thermal-sensitive wire is not required to be coated with any waterproof material under any special humid environment, the raw material is not required to be supported by cotton yarns, the flame is small when the thermal-sensitive flux core is combusted, and the phenomena that sparks are splashed after the thermal-sensitive wire is ignited, high-temperature residue particles are uncontrollably splashed and cannot be completely combusted can be avoided. Only a small amount of smoke is generated in the combustion process, no residue is generated after combustion, no hidden danger of secondary disaster is caused, no pollution is caused to the environment, the heat-sensitive wire is an environment-friendly heat-sensitive wire, and the plasticizer is added into the raw materials of the heat-sensitive flux core, so that the structure of the whole heat-sensitive flux core is more compact, the flexibility of the heat-sensitive flux core is increased, the heat-sensitive flux core can be bent randomly and is not easy to break, and the starting fire transfer performance of the whole set of fire extinguishing device is further improved.
The sleeve can be woven by high-temperature-resistant alkali-free glass fibers, is uniform in thickness and size, has certain flexibility, is not allowed to have the conditions of holes, cracks, serious fracture, oil stains and the like, is resistant to temperature of 600 ℃, is non-flammable and can be automatically extinguished, open fire caused by combustion of the sleeve is avoided, the effect of protecting the thermosensitive drug core can be achieved, and meanwhile, the heat can be effectively transferred to the drug core without sealing the sleeve so as to normally start the thermosensitive drug core in the sleeve; the connecting terminal can be made of copper tinning material, is nonflammable, can transfer heat and is used for fixing the thermosensitive flux core; the sleeve head can be made of rubber materials to protect the connecting terminals.
In some embodiments of the present invention, the temperature sensing agent comprises a double base and nitrocellulose. In the above embodiment, the double-base medicament is a smokeless medicament with nitrocotton and nitroglycerin or other explosive plasticizers as basic energy components, the nitrocellulose is obtained by esterification reaction of refined cotton, concentrated nitric acid and concentrated sulfuric acid, and can be used for manufacturing smokeless powder, the double-base medicament and the nitrocellulose are used as temperature sensing agents, both are inflammable, can be automatically started when the surface of the thermosensitive core reaches the starting temperature, and only a small amount of smoke is generated in the combustion process.
In some embodiments of the present invention, the oxidizer includes one or two of ammonium perchlorate, potassium chlorate, potassium nitrate, and sodium nitrate. In the above examples, ammonium perchlorate, potassium chlorate, potassium nitrate and sodium nitrate are all inflammable substances having a very strong oxidizing property, and only a small amount of sparks are generated during combustion.
In some embodiments of the invention, the stabilizer is neutralizer No. 2. In the above embodiment, the intermediate agent No. 2 can be used as a stabilizer for smokeless powder, explosive, nitride and smokeless fuel, and the safety is more stable when the intermediate agent No. 2 is added.
In some embodiments of the present invention, the plasticizer includes one or two of phenolic resin, phthalate, styrene-butadiene rubber and polyurethane. In the above embodiment, the phenolic resin, the phthalate, the styrene-butadiene rubber and the polyurethane are all high temperature resistant, so that the structure of the whole thermosensitive drug core is more compact, the thermal starting temperature stability can be improved under the combined action of the phenolic resin, the phthalate, the styrene-butadiene rubber and the polyurethane, the rapid and stable starting and fire transfer effects can be achieved, meanwhile, the plasticizer can increase the flexibility of the thermosensitive drug core, and the thermosensitive drug core can be bent randomly and is not easy to break, so that the starting and fire transfer performance of the whole set of fire extinguishing device is further improved.
In some embodiments of the present invention, the defoaming agent is one of polyoxyethylene polyoxypropylene ether, polydimethylsiloxane and polyoxypropylene glycerol ether. In the above embodiments, polyoxyethylene polyoxypropylene ether, polydimethylsiloxane or polyoxypropylene glycerol ether is used as the defoaming agent, which is resistant to high temperature and has strong defoaming performance and rapid defoaming capability.
In some embodiments of the present invention, the catalytic regulator includes one or two of ferric oxide, ferrocene, copper chromite, charcoal powder and melamine. In the above embodiment, ferric oxide, ferrocene, copper chromite, charcoal powder and melamine are used as the catalytic regulator to catalyze the reaction process, and the method has the characteristics of high sensitivity, good stability and the like.
In some embodiments of the present invention, the solvent includes at least two of acetone, ethanol, and ethyl acetate. In the above examples, the solid raw material is insoluble in water and soluble in organic solvents, so acetone, ethanol or ethyl acetate were selected as the solvent.
The embodiment of the invention also provides a preparation method of the moisture-proof and waterproof thermosensitive wire, which comprises the following steps: dissolving a temperature sensing agent and a stabilizing agent in a solvent for 22-26h to obtain a solution; mixing oxidant and catalytic regulator, and sieving to obtain powder; mixing the dissolved solution and the powder, adding a plasticizer and a defoaming agent, and stirring for 60-90min to obtain a mixture; extruding the mixture into strip leads, and drying to obtain the thermosensitive drug core; and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
In the embodiment, the preparation method is simple and convenient, and the thermosensitive wire prepared by the invention can be used only by mixing, pressing and drying the thermosensitive drug core, wrapping a sleeve outside the thermosensitive drug core, pressing and fixing one end of the sleeve by using the connecting terminal, protecting the sleeve by using the sleeve head, and connecting the other end of the sleeve with the aerogenic agent elicitation automatic fire extinguishing device.
In some embodiments of the invention, the drying step is natural drying for 22-26h and then drying at 50-60 ℃ for 22-26 h. In the above embodiment, the heat sensitive medicated core is completely dried after being naturally dried and then dried, and the shape of the heat sensitive medicated core after being dried can be fixed.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
A moisture-proof and waterproof thermosensitive wire is prepared by the following steps:
weighing 65g of double-base medicine, 15g of nitrocellulose and 1g of a neutralization reagent No. 2, adding 160g of a mixed solvent of acetone and ethanol, and dissolving for 24 hours to obtain a dissolved solution, wherein the ratio of acetone to ethanol is 6: 4;
uniformly mixing 12g of potassium perchlorate with 2g of charcoal powder and 4g of ferric oxide, and sieving with a 100-mesh sieve to obtain powder;
mixing the dissolved solution and the powder, adding 4g of phthalate and 2g of polyoxypropylene glycerol ether, placing one of the phthalate and the polyoxypropylene glycerol ether in a stirrer, and stirring for 75min to obtain a mixture;
extruding the mixture into strip leads by a special lead making machine through a screw, naturally airing for 24h, and drying at 55 ℃ for 24h to obtain the heat-sensitive medicine core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Example 2
A moisture-proof and waterproof thermosensitive wire is prepared by the following steps:
weighing 62g of double-base medicine, 13g of nitrocellulose and 1g of a neutralization reagent No. 2, adding 150g of a mixed solvent of acetone and ethyl acetate, and dissolving for 22h to obtain a dissolved solution, wherein the ratio of acetone to ethyl acetate is 7: 3;
uniformly mixing 8g of potassium perchlorate with 2g of melamine and 4g of ferrocene, and sieving the mixture with a 100-mesh sieve to obtain powder;
mixing the dissolved solution and the powder, adding 2g of phenolic resin, 2g of butadiene styrene rubber and 2g of polyoxyethylene polyoxypropylene ether, and placing one of the phenolic resin, the butadiene styrene rubber and the polyoxyethylene polyoxypropylene ether in a stirrer to stir for 60min to obtain a mixture;
extruding the mixture into strip leads by a special lead making machine through a screw, naturally airing for 22h, and drying at 50 ℃ for 26h to obtain the heat-sensitive medicine core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Example 3
A moisture-proof and waterproof thermosensitive wire is prepared by the following steps:
weighing 70g of double-base medicine, 15g of nitrocellulose and 2g of a neutralization reagent, adding 170g of a mixed solvent of ethyl acetate and ethanol, and dissolving for 26 hours to obtain a dissolved solution, wherein the ratio of ethyl acetate to ethanol is 4: 6;
uniformly mixing 8g of potassium perchlorate, 7h of potassium nitrate, 4g of charcoal powder and 6g of copper chromite, and screening the mixture by a 100-mesh screen to obtain powder;
mixing the dissolved solution and the powder, adding 2g of phenolic resin, 4g of polyurethane and 4g of polydimethylsiloxane, and placing one of the phenolic resin, the polyurethane and the polydimethylsiloxane in a stirrer to stir for 90min to obtain a mixture;
extruding the mixture into strip leads by a special lead making machine through a screw, naturally airing for 26h, and drying at 60 ℃ for 22h to obtain the heat-sensitive medicine core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Example 4
A moisture-proof and waterproof thermosensitive wire is prepared by the following steps:
weighing 68g of double-base medicine, 12g of nitrocellulose and 1g of a neutralization reagent No. 2, adding into 155g of a mixed solvent of acetone and ethanol, and dissolving for 23h to obtain a dissolved solution, wherein the ratio of acetone to ethanol is 5: 5;
uniformly mixing 7g of ammonium perchlorate, 7g of sodium nitrate and 8g of ferric oxide, and sieving the mixture by a 100-mesh sieve to obtain powder;
mixing the dissolved solution and the powder, adding 5g of styrene-butadiene rubber and 3g of polyoxypropylene glycerol ether, placing one of the styrene-butadiene rubber and the polyoxypropylene glycerol ether in a stirrer, and stirring for 80min to obtain a mixture;
extruding the mixture into strip leads by a special lead making machine through a screw, naturally airing for 25h, and drying at 58 ℃ for 23h to obtain the heat-sensitive medicine core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Example 5
A moisture-proof and waterproof thermosensitive wire is prepared by the following steps:
weighing 62g of double-base medicine, 16g of nitrocellulose and 2g of a neutralization reagent, adding into 165g of a mixed solvent of acetone and ethyl acetate, and dissolving for 24 hours to obtain a dissolved solution, wherein the ratio of acetone to ethyl acetate is 5: 5;
mixing 7g of potassium chlorate, 5g of potassium nitrate, 3g of melamine and 5g of copper chromite uniformly, and sieving the mixture with a 100-mesh sieve to obtain powder;
mixing the dissolved solution and the powder, adding 3g of phthalate, 3g of polyurethane and 3g of polyoxyethylene polyoxypropylene ether, placing one of the phthalate, the polyurethane and the polyoxyethylene polyoxypropylene ether in a stirrer, and stirring for 65min to obtain a mixture;
extruding the mixture into strip leads by a special lead making machine through a screw, naturally airing for 23h, and drying at 52 ℃ for 25h to obtain the heat-sensitive medicine core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Example 6
A moisture-proof and waterproof thermosensitive wire is prepared by the following steps:
weighing 68g of double-base medicine, 15g of nitrocellulose and 2g of a neutralization reagent, adding 163g of mixed solvent of acetone and ethanol, and dissolving for 23 hours to obtain a dissolved solution, wherein the ratio of acetone to ethanol is 6: 4;
uniformly mixing 7g of ammonium perchlorate, 7g of potassium nitrate and 8g of ferric oxide, and sieving the mixture by a 100-mesh sieve to obtain powder;
mixing the dissolved solution and the powder, adding 5g of phthalate and 3g of polyoxypropylene glycerol ether, placing one of the phthalate and the polyoxypropylene glycerol ether in a stirrer, and stirring for 80min to obtain a mixture;
extruding the mixture into strip leads by a special lead making machine through a screw, naturally airing for 25h, and drying at 58 ℃ for 23h to obtain the heat-sensitive medicine core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, press-fitting and fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
Comparative example 1
Comparative example 1 compared to example 1, no plasticizer was added to the raw materials.
Examples of the experiments
(one) this Experimental example was conducted to determine the moisture and water resistance of the thermosensitive wire prepared by the present invention
In the experimental example, the damp-proof and waterproof performance of the heat-sensitive wire is determined by testing the influence of the heat-sensitive wire on the spontaneous combustion time under the damp condition, 8 groups of experimental groups are arranged, wherein 1-6 groups of the heat-sensitive wire are respectively prepared by examples 1-6 of the invention, 7 th group of the heat-sensitive wire is prepared by comparative example 1, 8 th group of the experimental groups is a control group, the control group of the experimental groups adopts a common commercially available heat-sensitive wire, each group of the heat-sensitive wire is soaked in water for 24 hours and then taken out, and the heat-sensitive wire is respectively placed in a constant temperature box at 180 ℃ and 250 ℃ to determine the spontaneous combustion time. The measurement results are shown in table 1.
TABLE 1
As can be seen from Table 1, the heat-sensitive wires prepared in examples 1 to 6 spontaneously ignite within 40 seconds in an incubator at 180 ℃, the heat-sensitive wires prepared in examples 1 to 6 spontaneously ignite within 20 seconds in an incubator at 250 ℃, and the heat-sensitive wires prepared in comparative example 1 have longer spontaneous ignition time compared with the heat-sensitive wires prepared in examples, which shows that the addition of the plasticizer can enable the heat-sensitive wires to rapidly and stably transfer fire better, while the commercially available common heat-sensitive wires are affected by moisture and have longer spontaneous ignition time compared with groups 1 to 7, thereby showing that the heat-sensitive wires prepared in the invention have excellent moisture-proof and water-proof properties.
(II) this experimental example determines the bending property of the thermosensitive core prepared by the invention
The experimental example tests the ability of the heat-sensitive medicine core to resist bending and not fracture by a three-point bending method, thereby showing the bending characteristic of the heat-sensitive medicine core, 7 groups of experimental groups are arranged, wherein 1-6 groups respectively adopt the heat-sensitive medicine cores prepared by examples 1-6 of the invention, the 7 th group adopts the heat-sensitive medicine core prepared by comparative example 1, the test is carried out by a three-point bending strength tester, samples are respectively placed on two supporting points with a certain distance in each group, downward load is applied to the samples above the midpoints of the two supporting points, three-point bending occurs when 3 contact points of the samples form two equal moments, the samples fracture at the midpoints, and the fracture condition of each group of heat-sensitive wires when different forces are applied is recorded. The measurement results are shown in Table 2.
TABLE 2
| Group of | 5N | 10N | 15N | 20N |
| 1 | Does not break | Does not break | Does not break | Fracture of |
| 2 | Does not break | Does not break | Does not break | Fracture of |
| 3 | Does not break | Does not break | Does not break | Does not break |
| 4 | Does not break | Does not break | Does not break | Fracture of |
| 5 | Does not break | Does not break | Does not break | Does not break |
| 6 | Does not break | Does not break | Does not break | Does not break |
| 7 | Does not break | Does not break | Fracture of | Fracture of |
As can be seen from table 2, the thermal core prepared in comparative example 1 broke when a force of 15N was applied, while the thermal core prepared in examples did not break when an equal amount of force was applied, and the thermal core prepared in examples began to break to different degrees when a force of 20N was applied, which indicates that the thermal core prepared in the present invention can enhance the flexibility of the thermal core after adding the plasticizer, so that it is not easily broken when it is bent at will.
In conclusion, the invention provides a moisture-proof and waterproof heat-sensitive wire which is formed by wrapping a sleeve outside one or more moisture-proof and waterproof heat-sensitive medicine cores, one end of the moisture-proof and waterproof heat-sensitive wire is pressed and fixed by a connecting terminal and then protected by a sleeve head, the other end of the moisture-proof and waterproof heat-sensitive wire is connected with an automatic fire extinguishing device started by a gas generating agent, and the heat-sensitive wire is reliably ignited within 5 seconds under the action of flame or can be ignited by spontaneous combustion when the environmental temperature reaches 160 +/-15 ℃ under the standard atmosphere. The thermosensitive flux core is a core wire formed by mixing and pressing materials such as a temperature sensing agent, an oxidizing agent, a stabilizing agent, a plasticizer, a defoaming agent, a catalytic regulator and the like, and the excellent thermosensitive temperature sensing material is adopted, so that the hot start temperature is more stable, and the thermosensitive flux core can stably transfer fire even if the sleeve is internally provided with less than 10 cm. The heat-sensitive flux core can be immediately ignited after being soaked in water for 24 hours, or spontaneously ignited after reaching the starting temperature, has good moisture-proof and waterproof performances, does not need to be coated with any waterproof material, does not have cotton yarn auxiliary support in raw materials, ensures that the flame is small when the heat-sensitive flux core is combusted, only generates a small amount of smoke in the combustion process, does not have residues after being combusted, does not cause the hidden danger of secondary disasters, and is an environment-friendly heat-sensitive wire.
The plasticizer is added into the raw materials of the thermosensitive flux core, so that the structure of the whole thermosensitive flux core is more compact, the plasticizer and the temperature sensing agent act together, the stability of the hot start temperature can be improved, the effects of quick and stable start and fire transfer are achieved, meanwhile, the plasticizer can increase the flexibility of the thermosensitive flux core, and the thermosensitive flux core can be bent randomly and is not easy to break, so that the start fire transfer performance of the whole set of fire extinguishing device is improved.
In addition, the invention also provides a preparation method of the moisture-proof and waterproof heat-sensitive wire, the preparation method is simple and convenient, the heat-sensitive wire prepared by the invention can be used only by mixing, pressing and drying the heat-sensitive medicine core, then wrapping a sleeve outside the heat-sensitive medicine core, pressing and fixing one end of the sleeve by using the connecting terminal and then protecting the sleeve by using the sleeve head, and connecting the other end of the sleeve with the automatic fire extinguishing device for initiating the gas generating agent.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A damp-proof and waterproof thermosensitive wire is characterized by comprising a thermosensitive flux core, a sleeve, a connecting terminal and a sleeve head, wherein the sleeve is sleeved on the outer side of the thermosensitive flux core, one end of the thermosensitive flux core is connected with the connecting terminal, and the sleeve head is sleeved on the outer side of the connecting terminal;
the thermosensitive flux core comprises the following raw materials in parts by weight: 75-85 parts of temperature sensing agent, 8-15 parts of oxidant, 1-2 parts of stabilizer, 4-6 parts of plasticizer, 2-4 parts of defoaming agent, 6-10 parts of catalytic regulator and 150-170 parts of solvent.
2. The moisture and water resistant thermal wire of claim 1 wherein the temperature sensing agent comprises a bis-base and nitrocellulose.
3. The moisture and water resistant heat sensitive wire of claim 1, wherein the oxidizer comprises one or two of ammonium perchlorate, potassium chlorate, potassium nitrate, and sodium nitrate.
4. The moisture and water resistant thermosensitive wire according to claim 1, wherein the stabilizer is medium size 2.
5. The moisture-proof, waterproof and thermosensitive wire according to claim 1, wherein the plasticizer comprises one or two of phenolic resin, phthalate, styrene-butadiene rubber and polyurethane.
6. The moisture-proof and waterproof thermosensitive wire according to claim 1, wherein the defoaming agent is one of polyoxyethylene polyoxypropylene amine ether, polydimethylsiloxane and polyoxypropylene glyceryl ether.
7. The moisture and water resistant heat sensitive wire of claim 1, wherein the catalytic modifier comprises one or two of ferric oxide, ferrocene, copper chromite, charcoal powder, and melamine.
8. The moisture and water resistant heat sensitive wire of claim 1, wherein the solvent comprises at least two of acetone, ethanol, and ethyl acetate.
9. A method for preparing a moisture and water resistant heat sensitive wire as defined in any one of claims 1 to 8, comprising the steps of:
mixing a temperature sensing agent, a stabilizing agent and a solvent to obtain a dissolved solution;
mixing oxidant and catalytic regulator, and sieving to obtain powder;
mixing the dissolved solution and the powder, adding a plasticizer and a defoaming agent, and stirring to obtain a mixture;
extruding the mixture into strip leads, and drying to obtain the thermosensitive drug core;
and (3) wrapping a sleeve on the outer side of the thermosensitive flux core, fixing one end of the thermosensitive flux core by using a connecting terminal, and sleeving a sleeve head on the outer side of the connecting terminal to obtain the finished thermosensitive wire.
10. The method for preparing a moisture-proof and waterproof thermosensitive wire according to claim 9, wherein the drying step is carried out by naturally airing for 22-26 hours and then drying at 50-60 ℃ for 22-26 hours.
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