Preparation method of foam-based copper sulfide smoke agent
By preparing foam-based copper sulfide smoke agent, the problems of small smoke screen area and short retention time are solved, effective interference to infrared and millimeter waves are achieved, production costs are reduced, and additional dispersants are not required.
Patent Information
- Application Number
- CN202510317850.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-07-08
AI Technical Summary
The effective smoke screen formed by existing smoke agents is small in area and maintaining time short, and has poor interference effects on infrared, millimeter waves and visible light.
Using the preparation method of foam-based copper sulfide smoke agent, foam-based copper sulfide smoke agent is formed by adding foaming agent to the polystyrene particles and heating up the melting, adding electronic interference new materials or copper oxide, controlling the particle size and coating conductive carbon slurry.
The smoke agent is self-dispersible and can be suspended in the air for a long time, improving the interference effect on infrared and millimeter waves, reducing production costs, and no additional dispersant is required.
Smart Images
Figure CN120272162A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of interference smoke agents, and particularly to a foam-based copper sulfide smoke agent and a preparation method thereof. Background Art
[0002] The smoke interference material for infrared guidance shielding is a very effective and cost-effective passive jamming agent for optoelectronic countermeasures. In terms of actual use performance, it is required that the smoke interference material (hereinafter referred to as "smoke agent") not only has good dissipation physical and chemical properties and capabilities such as infrared absorption, reflection, scattering, and refraction, but also, from a practical combat perspective, should at least have the following capabilities: being easy to disperse, and under the condition of the same mass, being able to form the largest area of effective smoke (smoke screen) to the greatest extent in terms of spraying and releasing; the formed smoke can be maintained for the longest time, such as more than ten minutes or longer; having low cost and being friendly to users and the environment; in addition, since infrared (1-3, 3-5, 1-12 microns) guidance and millimeter wave (3mm, 8mm) guidance are the development directions of precision-guided weapons and also the most widely used guidance methods at present. An ideal smoke agent should be able to simultaneously interfere with and shield infrared, millimeter wave, and even visible light, and should be applicable to multiple spectra. Summary of the Invention
[0003] The purpose of the present invention is to provide a foam-based copper sulfide smoke agent and a preparation method thereof to solve the problems in the above background art that the area of the effective smoke screen formed by the existing smoke agent is small, the retention time is short, and the interference effects on infrared, millimeter wave, and even visible light are poor.
[0004] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a preparation method of a foam-based copper sulfide smoke agent, including the following steps:
[0005] Step 1: Add a foaming agent to the raw material polystyrene particles, heat up and melt to 250-360 °C, and perform melting and foaming to obtain a foam melt.
[0006] Step 2: Gradually add a new electronic interference material under stirring conditions, keep the foaming temperature unchanged until the new electronic interference material is evenly dispersed in the foam melt, perform extrusion granulation, control the particle size between 3-8 mm, and cool and classify to obtain the target smoke agent.
[0007] Step 3: Coat the surface of the target smoke agent with conductive carbon paste to obtain a foam-based copper sulfide smoke agent.
[0008] Further, the dosage of the foaming agent (by mass) in the Step 1 is 1-10% of the dosage of the raw material polystyrene particles (by mass).
[0009] Further, in the second step, the dosage of the new electronic interference material (by mass) is 1-10 times that of the raw material polystyrene particles (by mass).
[0010] Further, replace the new electronic interference material in the second step with copper oxide or copper powder.
[0011] Further, change the adding method of the conductive carbon paste and the new electronic interference material, which specifically includes the following steps:
[0012] S1: Extrude and granulate the foamed molten liquid in the first step, cool and classify it to obtain polystyrene foam particles;
[0013] S2: Add the conductive carbon paste into the stirring cylinder, dilute it with ethanol in the stirring cylinder, add the polystyrene foam particles and stir to mix evenly, so that the surfaces of all the polystyrene foam particles are covered with the conductive carbon paste;
[0014] S3: Slowly pour the new electronic interference material into the stirring cylinder, and keep stirring until the surfaces of all the foam particles are loaded with the new electronic interference material;
[0015] S4: Take out the stirring paddle, seal the outlet of the stirring cylinder with a 400-mesh metal screen, and blow nitrogen at 60-90 °C from the bottom of the stirring cylinder for purging and drying until all the foam particles are dry, to obtain the foam-based copper sulfide smoke agent.
[0016] Further, in S1, dilute the conductive carbon paste with ethanol to 8-12 times.
[0017] Further, in S1, the dosage of the conductive carbon paste (by mass) is 7-11% of the polystyrene foam particles.
[0018] Further, in S2, the dosage of the new electronic interference material (by mass) is 10-30% of the polystyrene foam particles.
[0019] The present invention provides a foam-based copper sulfide smoke agent, which is specifically prepared by the above preparation method.
[0020] Compared with the prior art, the above one or more technical solutions have the following beneficial effects: (1) The smoke agent itself has self-dispersibility and does not require additional modifiers such as dispersants and flow agents; (2) The prepared smoke agent can be suspended in the air for a long time; (3) Lower-cost raw materials such as foaming agents can be used and produced by ordinary processes; (4) Surface modification can be carried out by conventional methods such as coating conductive carbon paste or silver paste to improve its surface conductivity, and thus improve its electromagnetic interference and shielding capabilities. Description of the Drawings
[0021] Figure 1 It is a schematic diagram of a smoke box.
[0022] Figure 2It is the performance test results of three solutions in the cigarette case. Detailed implementation mode
[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0024] The patent for a new electronic interference material (application number ZL2024102005041) that has been applied for and is pending publication discloses a manufacturing method of a new electronic interference material.
[0025] Embodiment:
[0026] The first solution prepares a foam-based copper sulfide smoke agent by the following method:
[0027] Step 1: Add a foaming agent to the raw material polystyrene particles, heat up to 250 - 360 °C for melting and foaming to obtain a foam melt.
[0028] Step 2: Under stirring conditions, gradually add the new electronic interference material, keep the foaming temperature unchanged until the new electronic interference material is evenly dispersed in the foam melt, then carry out extrusion granulation, control the particle size between 3 - 8 mm, and cool and classify to obtain the target smoke agent.
[0029] Step 3: Coat the surface of the target smoke agent with conductive carbon paste to obtain a foam-based copper sulfide smoke agent.
[0030] Among them, the raw material polystyrene particles are directly purchased from the market.
[0031] Melting temperature: 150 - 450 °C; diameter of the raw material polystyrene particles: 0.2 - 2.5 mm; length of the raw material polystyrene particles: 1 - 5 mm; dosage of the foaming agent (by mass) is 1 - 10% of the dosage of the raw material polystyrene particles (by mass); the new electronic interference material is copper sulfide, and the dosage of the new electronic interference material (by mass) is 1 - 10 times the dosage of the raw material polystyrene particles (by mass).
[0032] It can be seen from the figure that the structure of the foam-based copper sulfide smoke agent prepared by the method of the first solution is that the foam melt wraps the new electronic interference material, and finally it is coated with conductive carbon paste. The foam-based copper sulfide smoke agent obtained by this solution has its aerial time extended to dozens of minutes, has a good effect against infrared, and has almost zero shielding effect on millimeter waves.
[0033] The second solution: prepares a foam-based copper sulfide smoke agent by using copper oxide or copper powder to replace the new electronic interference material in Step 2 of the first solution.
[0034] Step 1: Add a foaming agent to the raw material of polystyrene particles, heat up to 250 - 360 °C for melting and foaming to obtain a foamed molten liquid;
[0035] Step 2: Gradually add copper oxide or copper powder under stirring conditions, keep the foaming temperature unchanged until the copper oxide or copper powder is evenly dispersed in the foamed molten liquid, then carry out extrusion granulation, control the particle size between 3 - 8 mm, and cool and classify to obtain the target smoke agent;
[0036] Step 3: Coat the surface of the target smoke agent with conductive carbon paste to obtain a foam-based copper sulfide smoke agent.
[0037] Among them, the raw material of polystyrene particles is directly purchased from the market.
[0038] Diameter of the raw material of polystyrene particles: 0.2 - 2.5 mm; length of the raw material of polystyrene particles: 1 - 5 mm; foaming agent: 1 - 10% of the dosage of the raw material of polystyrene particles.
[0039] The dosage of copper oxide or copper powder (by mass) is 1 - 10 times that of the raw material of polystyrene particles (by mass).
[0040] As can be seen from the figure, the structure of the foam-based copper sulfide smoke agent prepared by the method of Scheme II is that the foamed molten liquid wraps copper oxide or copper powder, and finally it is coated with conductive carbon paste. Compared with Scheme I, the foam-based copper sulfide smoke agent obtained by this scheme has a smaller change in the hovering time, improved anti-infrared effect, and good shielding effect against millimeter waves.
[0041] Scheme III: Change the addition method of conductive carbon paste and new electronic interference materials, specifically including the following steps:
[0042] Step 1: Add a foaming agent to the raw material of polystyrene particles, with the foaming temperature being 250 - 360 °C, carry out melting and foaming to obtain a foamed molten liquid;
[0043] Step 2:
[0044] S1: Extrude and granulate the foamed molten liquid in Step 1, cool and classify to obtain polystyrene foam particles;
[0045] S2: Add conductive carbon paste into the stirring cylinder, dilute it with ethanol in the stirring cylinder, add polystyrene foam particles and stir to mix evenly so that the surfaces of all polystyrene foam particles are covered with conductive carbon paste;
[0046] S3: Slowly pour new electronic interference materials into the stirring cylinder, keep stirring until the surfaces of all foam particles are loaded with new electronic interference materials;
[0047] S4: Remove the stirring paddle, seal the outlet of the mixing drum with a 400-mesh wire screen, and blow in nitrogen at 60-90 °C from the bottom of the mixing drum for purging and drying until all the foam particles are dry, thus obtaining the foam-based copper sulfide smoke agent.
[0048] Among them, in S1, the conductive carbon paste is diluted with ethanol by 8-12 times.
[0049] The dosage of the conductive carbon paste (by mass) in S1 is 7-11% of the polystyrene foam particles.
[0050] The dosage of the new electronic interference material (by mass) in S2 is 10-30% of the polystyrene foam particles.
[0051] Among them, the raw material polystyrene particles are directly purchased from the market.
[0052] The diameter of the raw material polystyrene particles: 0.2-2.5 mm; the length of the raw material polystyrene particles: 1-5 mm; the dosage of the foaming agent (by mass) is 1-10% of the dosage of the raw material polystyrene particles (by mass).
[0053] It can be seen from the figure that the structure of the foam-based copper sulfide smoke agent prepared by the method of Scheme 3 is that the surface of the polystyrene foam particles is covered with conductive carbon glue, and finally bonded with the new electronic interference material, i.e., copper sulfide. The foam-based copper sulfide smoke agent obtained by this scheme has almost the same anti-infrared effect as the foam-based copper sulfide smoke agent prepared by Scheme 2. The shielding effect on millimeter waves has been significantly improved compared with Scheme 2, and the hovering time has little change compared with Scheme 2.
[0054] In summary, for the anti-infrared effect: Scheme 2 < Scheme 3 ≤ Scheme 1; for the shielding effect on millimeter waves: Scheme 2 < Scheme 1 < Scheme 3; select the scheme to prepare the foam-based copper sulfide smoke agent according to actual needs.
[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. Preparation method of foam-based copper sulfide smoke agent, characterized in that: It includes the following steps: Step 1: Add a blowing agent to the raw material of polystyrene particles, heat up to 250 - 360 °C for melting and foaming to obtain a foam melt; Step 2: Gradually add the new electronic interference material under stirring conditions, keep the foaming temperature unchanged until the new electronic interference material is evenly dispersed in the foam melt, then carry out extrusion granulation, control the particle size between 3 - 8 mm, cool and classify to obtain the target smoke agent; Step 3: Coat the surface of the target smoke agent with conductive carbon paste to obtain the foam-based copper sulfide smoke agent; Among them, the dosage of the blowing agent (by mass) is 1 - 10% of the dosage of the raw material of polystyrene particles (by mass); the dosage of the new electronic interference material (by mass) is 1 - 10 times that of the raw material of polystyrene particles (by mass).
2. The preparation method of the foam-based copper sulfide smoke agent according to claim 1, wherein: Replace the new electronic interference material in Step 2 with copper oxide or copper powder.
3. The preparation method of the foam-based copper sulfide smoke agent according to claim 1, characterized in that: Change the addition method of the conductive carbon paste and the new electronic interference material, which specifically includes the following steps: S1: Carry out extrusion granulation on the foam melt in Step 1, cool and classify to obtain polystyrene foam particles; S2: Add the conductive carbon paste into the stirring cylinder, dilute it with ethanol in the stirring cylinder, add the polystyrene foam particles and stir to mix evenly so that the surfaces of all polystyrene foam particles are covered with the conductive carbon paste; S3: Slowly pour the new electronic interference material into the stirring cylinder, keep stirring until all the foam particles are loaded with the new electronic interference material on their surfaces; S4: Take out the stirring paddle, seal the outlet of the stirring cylinder with a 400 - mesh metal screen, blow nitrogen at 60 - 90 °C from the bottom of the stirring cylinder for purging and drying until all the foam particles are dry to obtain the foam-based copper sulfide smoke agent.
4. The preparation method of the foam-based copper sulfide smoke agent according to claim 3, characterized in that: In S2, the conductive carbon paste is diluted with ethanol by 8 - 12 times.
5. The preparation method of the foam-based copper sulfide smoke agent according to claim 3, characterized in that: In S2, the dosage of the conductive carbon paste (by mass) is 7 - 11% of the polystyrene foam particles.
6. The preparation method of the foam-based copper sulfide smoke agent according to claim 3, characterized in that: In S3, the dosage of the new electronic interference material (by mass) is 10 - 30% of the polystyrene foam particles.
7. Foam-based copper sulfide smoke agent, characterized in that: The foam-based copper sulfide smoke agent is prepared by the preparation method described in any one of claims 1 - 6.