An inorganic fiber-metal powder paper and a method of making and using the same

Abstract

The present application relates to the technical field of papermaking, in particular to an inorganic fiber-metal powder paper and a preparation method and application thereof. The preparation raw material of the inorganic fiber-metal powder paper provided by the present application includes active iron powder 70-85 parts by mass, potassium perchlorate 12-20 parts by mass and inorganic fiber 2-20 parts by mass. The present application uses inorganic fiber, potassium perchlorate and active iron powder as raw materials to make inorganic fiber-metal powder paper, which improves the performance of the iron powder paper and meets the requirement of high-temperature gas production. The inorganic fiber-metal powder paper provided by the present application has the characteristics of uniform energy density, high strength, free cutting, no cracks after pressing and extremely low gas production, and can be used in missiles as a heating iron powder paper.

Description

Technical Field

[0001] This invention relates to the field of iron powder paper technology, specifically to an inorganic fiber-metal powder paper, its preparation method, and its application. Background Technology

[0002] Missile technology is one of the fastest-growing cutting-edge technologies in modern science and technology, and thermal batteries are the main power source for missiles. As an important component of the thermal battery heating system, the production efficiency and quality of the heating element determine the performance of the thermal battery. In recent years, due to continuous technological upgrades, higher requirements have been placed on iron powder paper: (1) more uniform powder mixing; (2) iron powder paper has a certain strength before pressing, so that it can be handled without shedding powder; (3) it can be freely cut; (4) no cracks after pressing; (5) the paper's gas production is ≤0.1wt% within the range of room temperature to 700℃. However, the direct pressing method cannot meet the above requirements for iron powder paper.

[0003] Traditional missile heating element processing technology involves mixing active iron powder and potassium perchlorate in a certain mass ratio and pressing them into sheets. However, this direct pressing method has the following disadvantages: (1) uneven powder mixing leads to uneven energy density; (2) the strength of the missile heating element iron powder paper is too low before pressing, making it impossible to handle or cut; (3) the iron powder paper is prone to cracking or even breaking after pressing; it cannot meet the above requirements for missile heating element iron powder paper. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide an inorganic fiber-metal powder paper, its preparation method, and its application. The inorganic fiber-metal powder paper provided by this invention has high strength, can be freely cut, does not crack after pressing, and has extremely low gas production.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides an inorganic fiber-metal powder paper, which, by mass parts, is prepared from raw materials including 70-85 parts of active iron powder, 12-20 parts of potassium perchlorate, and 2-20 parts of inorganic fiber.

[0007] Preferably, the inorganic fiber includes at least one of glass fiber, ceramic fiber, asbestos fiber, boron nitride fiber, and metal fiber.

[0008] Preferably, the basis weight of the inorganic fiber-metal powder paper is 500–4000 g / m³. 2 .

[0009] This invention provides a method for preparing the inorganic fiber-metal powder paper described above, comprising the following steps:

[0010] Inorganic fibers and anhydrous organic solvents are mixed to obtain mixture 1;

[0011] Potassium perchlorate was dispersed in the mixture 1 to obtain mixture 2;

[0012] The active iron powder is dispersed in the mixture 2 to obtain the mixture 3;

[0013] The mixture 3 is dehydrated and molded in the mesh section and then pressed to obtain inorganic fiber-metal powder paper.

[0014] Preferably, the mixing process further includes pulping.

[0015] Preferably, the anhydrous organic solvent includes anhydrous lower alcohols.

[0016] Preferably, the concentration of inorganic fibers in the mixture 1 is 0.1 to 0.4 wt%.

[0017] Preferably, the potassium perchlorate is added in batches.

[0018] Preferably, the net concentration of the dehydrated and formed net section is 0.1% to 2%.

[0019] This invention provides the application of the inorganic fiber-metal powder paper described in the above technical solution or the inorganic fiber-metal powder paper prepared by the above technical solution in missiles.

[0020] The fibers commonly used in papermaking are plant fibers, which burn at high temperatures to produce gases such as CO2, leading to the failure of heating elements. The inorganic fiber-metal powder paper provided by this invention uses 70-85 parts of active iron powder, 12-20 parts of potassium perchlorate, and 2-20 parts of inorganic fiber as raw materials to produce inorganic fiber-metal powder paper. This improves the performance of the iron powder paper while meeting its requirements for high-temperature gas production. The inorganic fiber-metal powder paper provided by this invention has the characteristics of uniform energy density, high strength, free cutting, no cracks after pressing, and extremely low gas production, making it suitable for use as missile heating iron powder paper in missiles.

[0021] The method for preparing inorganic fiber-metal powder paper provided by this invention is simple in process, easy to operate, low in production cost, green and environmentally friendly, and suitable for industrial production. Detailed Implementation

[0022] This invention provides an inorganic fiber-metal powder paper, which, by mass parts, comprises 70-85 parts of active iron powder, 12-20 parts of potassium perchlorate, and 2-18 parts of inorganic fiber.

[0023] Unless otherwise specified, the materials and equipment used in this invention are all commercially available products in the field.

[0024] The raw materials for preparing the inorganic fiber-metal powder paper provided by the present invention, by weight, include 70-85 parts of active iron powder, preferably 72-82 parts, more preferably 75-80 parts, and even more preferably 76-78 parts.

[0025] The raw materials for preparing the inorganic fiber-metal powder paper provided by the present invention, by weight, include 12 to 20 parts of potassium perchlorate, preferably 13 to 19 parts, more preferably 14 to 18 parts, and even more preferably 15 to 16 parts.

[0026] The raw materials for preparing the inorganic fiber-metal powder paper provided by the present invention, by weight, include 2 to 20 parts of inorganic fiber, preferably 4 to 19 parts, and more preferably 10 to 15 parts. In the present invention, the inorganic fiber preferably includes at least one of glass fiber, ceramic fiber, asbestos fiber, boron nitride fiber, and metal fiber; the average diameter of the inorganic fiber is preferably 0.1 to 5 μm, more preferably 0.1 to 1 μm.

[0027] In this invention, the preferred basis weight of the inorganic fiber-metal powder paper is 500–4000 g / m³. 2 More preferably, it is 1000–3000 g / m 2 Specifically, the preferred value is 1500g / m 2 2000g / m 2 Or 2800g / m 2 .

[0028] This invention provides a method for preparing the inorganic fiber-metal powder paper described above, comprising the following steps:

[0029] Inorganic fibers and anhydrous organic solvents are mixed to obtain mixture 1;

[0030] Potassium perchlorate was dispersed in the mixture 1 to obtain mixture 2;

[0031] The active iron powder is dispersed in the mixture 2 to obtain the mixture 3;

[0032] The mixture 3 is dehydrated and molded in the mesh section and then pressed to obtain inorganic fiber-metal powder paper.

[0033] The present invention involves mixing inorganic fibers and anhydrous organic solvents to obtain a mixture 1.

[0034] In this invention, the anhydrous organic solvent includes anhydrous lower alcohols, more preferably anhydrous ethanol.

[0035] In this invention, the mixture preferably further includes a pulping process. This invention does not have any special limitations on the pulping process, as long as a uniformly dispersed inorganic fiber liquid can be obtained. The pulping degree of the mixture 1 is specifically selected as 75°SR.

[0036] In this invention, the concentration of inorganic fibers in the mixture 1 is preferably 0.1 to 0.4 wt%, more preferably 0.15 to 0.35 wt%, and even more preferably 0.2 to 0.3 wt%.

[0037] After obtaining mixture 1, the present invention disperses potassium perchlorate in mixture 1 to obtain mixture 2. In the present invention, the potassium perchlorate is preferably added in batches.

[0038] After obtaining mixture 2, the present invention disperses active iron powder in mixture 2 to obtain mixture 3. In the present invention, the active iron powder is preferably added in batches.

[0039] After obtaining the mixture 3, the present invention dehydrates and shapes the mixture 3 in the mesh section and then presses it to obtain inorganic fiber-metal powder paper.

[0040] In this invention, the wire mesh dewatering and forming process preferably uses a wire mesh concentration of 0.1-2%, more preferably 0.5-1.5%, and even more preferably 1%. In this invention, the wire mesh dewatering and forming process is preferably performed using an inclined wire paper machine, a Kaiser process high-speed sheet forming machine, or a long wire paper machine.

[0041] In this invention, the pressing temperature is preferably room temperature.

[0042] This invention also provides the application of the inorganic fiber-metal powder paper described in the above-described technical solutions, or the inorganic fiber-metal powder paper prepared by the above-described technical solutions, in missiles. In this invention, the inorganic fiber-metal powder paper is preferably used as the iron paper for missile heating elements in the missile's thermal battery heating system.

[0043] To further illustrate the present invention, the inorganic fiber-metal powder paper, its preparation method, and its application are described in detail below with reference to embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0044] Example 1

[0045] The raw materials for preparing inorganic fiber-metal powder paper are as follows, by mass: 4 parts asbestos fiber (grade 1 cotton), 18 parts potassium perchlorate, and 78 parts active iron powder.

[0046] Asbestos fibers were mixed with anhydrous ethanol and pulped to obtain a mixture 1 with a freeness of 75°SR and an asbestos fiber concentration of 0.2wt%.

[0047] Potassium perchlorate was added to the mixture 1 in 3 batches and dispersed evenly to obtain mixture 2;

[0048] The active iron powder was added to the mixture 2 in three batches and dispersed evenly to obtain the mixture 3.

[0049] The mixture 3 was dehydrated and shaped using an inclined wire paper machine (wire concentration of 0.2%), and pressed at room temperature to obtain inorganic fiber-metal powder paper with a basis weight of 2000 g / m². 2 It produces 0.01wt% gas, does not shed powder when handled, can be cut freely, and does not crack.

[0050] Example 2

[0051] The raw materials for preparing inorganic fiber-metal powder paper are as follows, by mass: 19 parts glass fiber (average diameter 1 μm), 16 parts potassium perchlorate, and 78 parts activated iron powder.

[0052] Glass fiber was mixed and dispersed evenly with anhydrous ethanol to obtain a mixture 1 with a glass fiber concentration of 0.12 wt%.

[0053] Potassium perchlorate was added to the mixture 1 in 4 batches and dispersed evenly to obtain mixture 2;

[0054] The active iron powder was added to the mixture 2 in three batches and dispersed evenly to obtain the mixture 3.

[0055] The mixture 3 was dehydrated and formed on the wire section using a Kaiser process rapid paper forming machine (wire concentration of 0.25%), and pressed at room temperature to obtain inorganic fiber-metal powder paper with a basis weight of 2800 g / m³. 2 It produces 0 wt% gas, does not shed powder when handled, can be cut freely, and has no cracks.

[0056] Example 3

[0057] The raw materials for preparing inorganic fiber-metal powder paper are as follows, by mass: 10 parts ceramic fiber (average diameter 1 μm), 14 parts potassium perchlorate, and 76 parts activated iron powder.

[0058] The ceramic fibers were mixed and dispersed evenly with anhydrous ethanol to obtain a mixed solution 1 with a ceramic fiber concentration of 0.25 wt%.

[0059] Potassium perchlorate was added to the mixture 1 in 3 batches and dispersed evenly to obtain mixture 2;

[0060] The active iron powder was added to the mixture 2 in three batches and dispersed evenly to obtain the mixture 3.

[0061] The mixture 3 was dehydrated and formed on the wire section using a long-wire paper machine (wire concentration of 0.3%), and pressed at room temperature to obtain inorganic fiber-metal powder paper with a basis weight of 1500 g / m². 2 It produces 0.01wt% gas, does not shed powder when handled, can be cut freely, and does not crack.

[0062] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, not all embodiments. People can obtain other embodiments based on the present invention without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for preparing inorganic fiber-metal powder paper, characterized in that, The raw materials for preparation, by mass, are 70-85 parts of active iron powder, 12-20 parts of potassium perchlorate, and 2-20 parts of inorganic fiber; The basis weight of the inorganic fiber-metal powder paper is 1500~4000 g / m³. 2 ; The preparation method includes the following steps: Inorganic fibers and anhydrous organic solvents are mixed to obtain mixture 1; potassium perchlorate is dispersed in mixture 1 to obtain mixture 2; The active iron powder is dispersed in the mixture 2 to obtain the mixture 3; The mixture 3 is dehydrated and molded in the mesh section and then pressed to obtain inorganic fiber-metal powder paper.

2. The preparation method according to claim 1, characterized in that, The inorganic fibers include at least one of glass fibers, ceramic fibers, asbestos fibers, boron nitride fibers, and metal fibers.

3. The preparation method according to claim 1, characterized in that, The mixing process also includes pulping.

4. The preparation method according to claim 1, characterized in that, The anhydrous organic solvent includes anhydrous lower alcohols.

5. The preparation method according to claim 1, 2, 3 or 4, characterized in that, The concentration of inorganic fibers in the mixture 1 is 0.1~0.4wt%.

6. The preparation method according to claim 1, characterized in that, The potassium perchlorate was added in batches.

7. The preparation method according to claim 1, characterized in that, The net concentration of the dehydrated and formed mesh is 0.1-2%.

8. The application of the inorganic fiber-metal powder paper prepared by the preparation method according to any one of claims 1 to 7 in missiles.