Environment-friendly A-grade fireproof sound-absorbing cotton and manufacturing method thereof

Abstract

The application provides environment-friendly A-grade fireproof sound-absorbing cotton and a manufacturing method thereof, and belongs to the technical field of sound-absorbing cotton. The application mainly aims at the poor heat insulation performance of traditional sound-absorbing cotton and provides the following scheme. The fireproof layer is made of superfine silicon crystal cotton material. The superfine silicon crystal cotton has multiple sets of voids in the inside, and the multiple sets of voids are interconnected to form sound-absorbing cavities. The top and bottom of the fireproof layer are both compounded with sound-absorbing material layers, and the two sets of sound-absorbing material layers are both glass fiber sound-absorbing felt. Multiple sets of packaging frames are arranged on the circumferential side of the fireproof layer, and the fireproof layer and the two sets of sound-absorbing material layers are both located in the multiple sets of packaging frames. The multiple sets of packaging frames are both made of metal or plastic material. The superfine silicon crystal cotton is used as the material of the fireproof layer, has excellent heat insulation performance, solves the problem of poor heat insulation performance of traditional sound-absorbing cotton, improves the fireproof grade, and makes the sound-absorbing cotton safer in actual application.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sound-absorbing cotton, more specifically, relates to an environmentally-friendly A-grade fireproof sound-absorbing cotton and a manufacturing method thereof. BACKGROUND

[0002] With the development of modern industry and transportation, various noise pollution problems are becoming increasingly serious, which has a great impact on people's quality of life and health. Various noise sources such as industrial noise, traffic noise, social noise and living noise are everywhere, which brings great trouble to people's daily life and work.

[0003] For example, the Chinese utility model patent with the patent number 201921573583.1 provides a sound-absorbing cotton. The sound-absorbing cotton is provided with a surface layer and multiple sound-absorbing layers. Multiple chessboard grids are arranged on the surface layer, and the multiple sound-absorbing layers are arranged in sequence and combined together to form multiple sound-absorbing cavities. The multiple chessboard grids and the multiple sound-absorbing cavities are used to absorb noise, thereby achieving the purpose of noise reduction. However, the traditional sound-absorbing cotton has low heat insulation performance and low fireproof grade, which leads to safety hazards in actual application. SUMMARY

[0004] To solve the above technical problems, the present application provides an environmentally-friendly A-grade fireproof sound-absorbing cotton and a manufacturing method thereof, to solve the technical problem that the traditional sound-absorbing cotton has low heat insulation performance and low fireproof grade, which leads to safety hazards in actual application.

[0005] The purpose and effect of the environmentally-friendly A-grade fireproof sound-absorbing cotton and the manufacturing method thereof are achieved by the following specific technical means:

[0006] The environmentally-friendly A-grade fireproof sound-absorbing cotton comprises a fireproof layer made of ultra-micro silicon crystal cotton. The ultra-micro silicon crystal cotton has multiple voids in the inside, and the multiple voids are connected to form sound-absorbing cavities. The top and bottom of the fireproof layer are both compounded with sound-absorbing material layers, and the two sound-absorbing material layers are both glass fiber sound-absorbing felt. Multiple packaging frames are arranged on the side of the fireproof layer. The fireproof layer and the two sound-absorbing material layers are located in the multiple packaging frames, and the multiple packaging frames are made of metal or plastic.

[0007] In a preferred embodiment, the ultra-micro silicon crystal cotton is made of multiple silicon crystal fibers.

[0008] In a preferred embodiment, the diameter of the multiple silicon crystal fibers is 5 microns.

[0009] In a preferred embodiment, the multiple silicon crystal fibers are fibrous substances formed by fluid compressed air blowing technology.

[0010] In a preferred embodiment, the components of the fluid are, by weight parts: 50 parts of silicon dioxide, 45 parts of chlorine trioxide, 0.9 parts of iron trioxide, 0.3-0.4 parts of sodium oxide, 0.3-0.4 parts of potassium oxide, 0.15-0.3 parts of calcium oxide, and 0.15-0.3 parts of magnesium oxide.

[0011] In a preferred embodiment, the thickness of the ultra-micro silicon crystal cotton is 10-20 mm.

[0012] A method for manufacturing an environmentally friendly A-level fireproof sound-absorbing cotton, comprising the following steps:

[0013] Step one: mixing the silicon dioxide, chlorine trioxide, iron trioxide, sodium oxide, potassium oxide, calcium oxide, and magnesium oxide in a proportion, adding them into a high-temperature furnace to melt and form a fluid;

[0014] Step two: using compressed air blowing technology to make the fluid form fibrous substances;

[0015] Step three: using a cotton collector to process the fibrous substances into ultra-micro silicon crystal cotton to form a fireproof layer;

[0016] Step four: compounding glass fiber sound-absorbing felt on the upper and lower surfaces of the fireproof layer to form sound-absorbing material layers on the top and bottom of the fireproof layer, thus completing the processing of the fireproof sound-absorbing cotton product;

[0017] Step five: installing an encapsulation frame on the four edges of the fireproof sound-absorbing cotton product.

[0018] In a preferred embodiment, in step one, the heating and melting temperature of the high-temperature furnace is 1400°C.

[0019] In a preferred embodiment, in step two, the pressure of the compressed air blowing technology is 0.5-0.8 MPa.

[0020] In a preferred embodiment, in step four, the thermal conductivity of the fireproof sound-absorbing cotton product is 0.0128 W / M.K. at a temperature of 500°C.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. Adopting ultra-micro silicon crystal cotton as fireproof layer material, the ultra-micro silicon crystal cotton is made of polysilicon crystal fiber, the fiber diameter is 5um, the ultra-micro silicon crystal cotton is formed by mixing mineral raw materials, high-temperature melting and blowing forming, can keep low thermal conductivity at 500 DEG C high temperature, has excellent heat insulation performance, solves the problem of poor heat insulation performance of traditional sound absorbing cotton, improves the fireproof grade, makes the sound absorbing cotton more safe in practical application; and a plurality of gaps are distributed in the fireproof layer, the gaps are interconnected to form sound absorbing cavities, which can play a good sound absorbing effect.

[0023] 2. By setting two groups of sound absorbing material layers, glass fiber sound absorbing felt is compounded on the upper and lower surfaces of the fireproof layer during the production of the sound absorbing cotton, the glass fiber sound absorbing felt has excellent sound absorbing performance, can efficiently absorb sound waves, reduce sound reflection and propagation, further enhances the sound absorbing effect of the sound absorbing cotton, and creates a quiet and comfortable environment for the user; meanwhile, the glass fiber sound absorbing felt also has good fireproof performance, in combination with the fireproof layer, further improves the fireproof performance of the sound absorbing cotton, and provides all-round protection for the user.

[0024] 3. The raw materials are mixed according to the proportion, high-temperature melting, and then the ultra-micro silicon crystal cotton fireproof layer is obtained by blowing forming; then the sound absorbing felt is compounded on the two surfaces of the fireproof layer, and finally the frame is packaged to complete the overall structure assembly, the whole production process is environmentally friendly and non-toxic; and a plurality of packaging frames are arranged on the circumferential side of the fireproof layer, which plays a role in fixing and protecting the fireproof layer and the sound absorbing material layer, and prevents damage to the product by external factors. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of an environmentally friendly A-grade fireproof sound absorbing cotton according to the present application;

[0026] Figure 2 is a structure diagram of an environmentally friendly A-grade fireproof sound absorbing cotton after being disassembled according to the present application;

[0027] Figure 3 is a top view of an environmentally friendly A-grade fireproof sound absorbing cotton according to the present application;

[0028] Figure 4 is Figure 3 the cross-sectional view of A-A;

[0029] Figure 5 is a step flow chart of a manufacturing method of an environmentally friendly A-grade fireproof sound absorbing cotton according to the present application.

[0030] In the drawings, the correspondence between the component names and the drawing numbers is as follows:

[0031] 1, fireproof layer; 2, sound absorbing material layer; 3, packaging frame. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present application, but cannot be used to limit the protection scope of the present application.

[0033] Embodiments

[0034] As shown in the accompanying Figure 1 to the accompanying Figure 5 drawings:

[0035] The present application provides an environmentally friendly A-level fireproof sound-absorbing cotton, which adopts ultra-micro silicon crystal cotton as the material of the fireproof layer 1. The ultra-micro silicon crystal cotton is a special mineral fiber material. At the same time, the ultra-micro silicon crystal cotton is internally designed with multiple groups of micro gaps that are connected. The shapes of these micro gaps are different, some are circular, some are elliptical or irregular, and the size is between 0.1-1mm. Multiple groups of micro gaps are connected to each other through narrow channels to form a micro sound-absorbing chamber. Due to the use of this special material, the fireproof layer 1 has a large number of micro and complex gap structures inside, which makes the fireproof layer 1 not only maintain excellent fireproof performance, but also effectively utilize the internal gap structure to provide excellent sound-absorbing effect. After the sound wave enters the fireproof layer 1, it will repeatedly propagate and attenuate in multiple groups of micro gaps, thereby achieving good sound insulation effect.

[0036] The glass fiber sound-absorbing felt is covered on the surface of the fireproof layer 1, which can fully exert the excellent sound-absorbing performance of the glass fiber sound-absorbing felt to create a quiet and comfortable environment for users. The glass fiber sound-absorbing felt uses glass fiber as the base body and is made by the melt-blown process of uniformly distributing micro bubbles. The micro bubbles inside can effectively absorb and weaken the propagation of sound waves, improving the sound-absorbing effect. At the same time, the thickness of the bubble layer is uniform and the distribution is also uniform, which better exerts its sound-absorbing function. The smooth surface can reflect and attenuate the incoming sound waves multiple times, further improving the sound-absorbing rate. When the sound wave reaches the surface of the fireproof layer 1, the glass fiber sound-absorbing felt can immediately absorb it. Since it is covered on the top and bottom of the fireproof layer 1, it can effectively reduce the reflection and propagation of sound waves in the fireproof layer 1, improving the sound-absorbing performance of the overall product. In addition, the glass fiber sound-absorbing felt itself also has a certain fireproof function by using high-temperature-resistant glass fiber as the base body. The combination of the glass fiber sound-absorbing felt and the fireproof layer 1 not only further improves the fireproof grade of the overall product, but also makes users obtain better safety protection in a quiet and comfortable environment.

[0037] Multiple groups of packaging frames 3 are arranged on the side of the fireproof layer 1. These packaging frames 3 completely wrap and protect the fireproof layer 1 and the two groups of sound-absorbing material layers 2 through peripheral fixation. On the one hand, the packaging frames 3 play a role in fixing the fireproof layer 1 and the sound-absorbing material layers 2, which can effectively resist the movement and falling of the three layers under external force. On the other hand, the packaging frames 3 also play a protective role to prevent cracking.

[0038] The multi-group packaging frame 3 is made of metal or plastic material, which has good durability and stability. The metal and plastic material itself has excellent durability and is not easy to deform, corrode or damage in long-term use and different environmental conditions. It ensures the structural stability of the packaging frame 3 itself and can long-term bear the function of fixing the inner layer. In addition, metal and plastic also have strong strength and toughness, which can effectively resist external impact and extrusion, long-term maintain shape and strength, and will not be deformed or broken due to stress, thereby better protecting the inner layer from external influences. On the other hand, these materials also have good stability and can maintain consistent physical properties under different conditions, providing stable fixing and protection function in various environments.

[0039] The ultra-fine silicon cotton is made of multi-silicon fiber, which is a high-efficiency thermal insulation material with the following advantages:

[0040] Light weight; the density of multi-silicon fiber is small, and the unit volume weight is light, which makes the ultra-fine silicon cotton made of multi-silicon fiber have the advantage of light weight;

[0041] Excellent thermal stability; multi-silicon fiber can maintain excellent thermal insulation performance in a wide temperature range and will not decrease in performance due to temperature change, which provides good thermal stability for the ultra-fine silicon cotton;

[0042] High strength; multi-silicon fiber has high strength and can effectively resist external compression and tearing, which provides good strength support for the ultra-fine silicon cotton;

[0043] Higher melting temperature; the melting temperature of multi-silicon fiber is higher than that of ordinary thermal insulation materials, which means that the ultra-fine silicon cotton can maintain excellent thermal insulation performance in higher temperature environment.

[0044] Multi-silicon fiber is a fibrous thermal insulation material formed by compressed air blowing technology. It is formed by blowing fluid droplets into fine droplets through compressed air and then quickly drying into fibrous material with a diameter of 5 μm at high temperature. This multi-silicon fiber can maintain low thermal conductivity at a high temperature of 500°C and has excellent thermal insulation performance, which can effectively block heat conduction. It solves the problem of insufficient thermal insulation performance of traditional sound-absorbing cotton. After improvement with multi-silicon fiber, the new sound-absorbing cotton improves its thermal insulation performance and fireproof rating, better blocks the spread of flame and heat, and improves the safety of the product.

[0045] The components of the fluid are as follows by weight: 50 parts of silicon dioxide, which plays a major role; 45 parts of chlorine trioxide, which acts as a catalyst and is conducive to the rapid hydrolysis of silicon dioxide into fibers during the spraying process; 0.9 parts of iron trioxide, which acts as a stabilizer and helps to control the formation and growth of fibers; 0.3-0.4 parts of sodium oxide, which acts as a stabilizer and, together with iron trioxide, controls the fiber generation process; 0.3-0.4 parts of potassium oxide, which acts as a softener and is conducive to the formation of slender fiber structures; 0.15-0.3 parts of calcium oxide, which acts as a stabilizer and, together with other ingredients, controls the fiber morphology; 0.15-0.3 parts of magnesium oxide, which acts as a stabilizer and, together with other ingredients, controls the fiber morphology; by reasonably controlling the ratio of these raw materials, a multi-silicon crystal fiber product with uniform fiber diameter and excellent heat insulation performance can be effectively formed.

[0046] The thickness of the ultra-micro silicon crystal cotton is 10-20 mm. The ultra-micro silicon crystal cotton in this thickness range has good heat insulation effect and can effectively block heat conduction. While maintaining a relatively light weight, it meets the needs of most daily heat insulation applications.

[0047] A manufacturing method of an environmentally friendly A-level fireproof sound-absorbing cotton comprises the following steps:

[0048] Step one: according to the raw material ratio, 50 parts of silicon dioxide, 45 parts of chlorine trioxide, 0.9 parts of iron trioxide, 0.3-0.4 parts of sodium oxide, 0.3-0.4 parts of potassium oxide, 0.15-0.3 parts of calcium oxide, and 0.15-0.3 parts of magnesium oxide are measured and mixed. The mixed raw materials are sent into a high-temperature furnace in a heat preservation container. Various raw materials gradually form an integrated high-temperature melt liquid through melting and chemical reaction. This process needs to maintain uniform temperature to prevent overheating or local supercooling of the melt, which may cause separation of components. Through high-temperature melting, various solid raw materials can be fully mixed at the molecular level, providing necessary conditions for subsequent processing.

[0049] Step two: compressed air spraying technology is used to form fiber-like substances. When the high-temperature melt liquid is kept at a high temperature, special equipment is used to spray compressed air at high speed onto the melt liquid surface. Compressed air is sprayed out of the nozzle at a high flow rate and directly hits the melt liquid surface. Under the action of the strong airflow generated by high-speed spraying, the melt liquid quickly separates into many small droplets. These droplets form long filamentous or slender fiber-like substances under the action of air flow. At the same time, the high-speed sprayed air also plays a role in rapid cooling, and the melt droplets quickly solidify in the air, thereby forming a fiber-like structure.

[0050] Step three: the fibrous material is collected by a cotton collector to form ultra-micro silicon crystal cotton, forming a fireproof layer 1; the fibrous material obtained in step two is sent into the cotton collector through a conveying system, the cotton collector is provided with a rotating collection cylinder and a filter screen, the cylinder wall is covered with small conical protrusions, the fibers will automatically arrange neatly and interweave together under the action of the rotating collection cylinder; at the same time, the filter screen plays a role in filtering impurities, only the fibers are retained, and other impurities are filtered out through the grid; under the joint action of the high-speed rotating collection cylinder and the filter screen, the fibers will automatically form a sheet structure, the fiber interweaving density of this structure is large, and the fireproof performance is good; after the collection is completed, the newly formed ultra-micro silicon crystal cotton sheet is taken out, and after drying and other post-processing, the fireproof layer 1 is obtained.

[0051] Step four: glass fiber sound-absorbing felt is compounded on the upper and lower surfaces of the fireproof layer 1 to form sound-absorbing material layers 2 on the top and bottom of the fireproof layer 1, thereby completing the processing of the fireproof sound-absorbing cotton product; the formed fireproof layer 1 is placed on a workbench, and then glass fiber sound-absorbing felt with a thickness of 3 mm is placed on the surface of the fireproof layer 1 from the upper and lower sides, and a rolling machine is used to hot-press between the glass fiber sound-absorbing felt and the fireproof layer 1, so that the sound-absorbing felt and the fireproof layer 1 are tightly bonded together to form two sound-absorbing material layers 2 above and below, the fibers in the sound-absorbing felt and the fibers in the fireproof layer 1 are bonded to each other during the hot-pressing process, forming a firm composite structure; finally, cooling and solidification are completed, and the production of the fireproof sound-absorbing cotton is completed, which has both fireproof and sound-absorbing functions.

[0052] Step five: an encapsulation frame 3 is installed on the four edges of the fireproof sound-absorbing cotton product to complete the assembly of the overall structure, and the entire production process is zero formaldehyde emission, environmentally friendly and non-toxic; first, the prepared fireproof sound-absorbing cotton is placed in a mold, then the encapsulation frame 3 is placed at the edge position of the product from all around, and then a hot press is used to hot-press and bond the encapsulation frame 3 and the composite material under appropriate pressure and temperature conditions, during the hot-pressing process, the thermoplastic resin in the frame material will soften and flow, and tightly bond with the composite material; after a certain time of hot-pressing and cooling and solidification, the assembly of the overall structure is completed, and all the raw materials used in this production process are natural plant fibers and non-toxic thermoplastic resins, and no harmful chemicals are added during the production process, and through strict control, the entire process is zero emission of formaldehyde and other VOC volatile organic compounds. Ensure that the product is non-toxic and harmless, and meet domestic and international environmental protection standards.

[0053] In step one, the raw materials are processed at high temperature, and the temperature of the high-temperature furnace is set to 1400°C to start the heating and melting process, and the high temperature of 1400°C completely melts the mixed minerals.

[0054] In step two, the compressed air blowing technology needs to control the pressure between 0.5-0.8MPa, this pressure range can be debugged to ensure the best performance of blowing effect, by controlling the pressure, the effective blowing of the material can be realized.

[0055] The thermal conductivity of the fireproof sound-absorbing cotton product is 0.0128W / M.K at a temperature of 500 DEG C, which means that the product has excellent heat insulation performance in a high-temperature environment, and the fireproof sound-absorbing cotton can effectively prevent heat transfer, and become an ideal choice for protecting personnel and property safety, in addition, the low thermal conductivity can also help to reduce the spread of noise and provide better acoustic insulation effect.

[0056] The embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A kind of environment-friendly A-grade fireproof sound-absorbing cotton, it is characterized by: The application relates to a fireproof sound-absorbing cotton product, which comprises a fireproof layer (1) made of superfine silicon crystal cotton, wherein a plurality of groups of voids are arranged in the superfine silicon crystal cotton and the voids are interconnected to form sound-absorbing cavities; sound-absorbing material layers (2) are arranged on the top and bottom of the fireproof layer (1), and the sound-absorbing material layers (2) are glass fiber sound-absorbing felt; a plurality of groups of packaging frames (3) are arranged on the side of the fireproof layer (1), the fireproof layer (1) and the sound-absorbing material layers (2) are located in the packaging frames (3), and the packaging frames (3) are made of metal or plastic; the superfine silicon crystal cotton is made of polysilicon crystal fibers; the polysilicon crystal fibers are fibrous substances formed by compressed air blowing technology; the polysilicon crystal fibers are composed of 50 parts of silicon dioxide, 45 parts of trichloride, 0.9 parts of ferric oxide, 0.3-0.4 parts of sodium oxide, 0.3-0.4 parts of potassium oxide, 0.15-0.3 parts of calcium oxide and 0.15-0.3 parts of magnesium oxide; the diameter of the polysilicon crystal fibers is 5 microns; the thickness of the superfine silicon crystal cotton is 10-20 mm. The polysilicon crystal fibers are composed of 50 parts of silicon dioxide, 45 parts of trichloride, 0.9 parts of ferric oxide, 0.3-0.4 parts of sodium oxide, 0.3-0.4 parts of potassium oxide, 0.15-0.3 parts of calcium oxide and 0.15-0.3 parts of magnesium oxide.

2. The environmentally friendly A-level fireproof sound-absorbing cotton according to claim 1, characterized in that: The diameter of the polysilicon crystal fibers is 5 microns.

3. The environmentally friendly A-level fireproof sound-absorbing cotton according to claim 1, characterized in that: The thickness of the superfine silicon crystal cotton is 10-20 mm.

4. The manufacturing method of the environment-friendly A-level fireproof sound-absorbing cotton according to any one of claims 1-3, characterized in that: The application further discloses a processing method of the fireproof sound-absorbing cotton product, which comprises the following steps: Step one: mixing silicon dioxide, trichloride, ferric oxide, sodium oxide, potassium oxide, calcium oxide and magnesium oxide in a high-temperature furnace to melt and form a fluid; Step two: adopting compressed air blowing technology to form fibrous substances from the fluid; Step three: using a cotton collector to process the fibrous substances into superfine silicon crystal cotton to form the fireproof layer (1); Step four: compounding glass fiber sound-absorbing felt on the upper surface and the lower surface of the fireproof layer (1) to form the sound-absorbing material layers (2) on the top and the bottom of the fireproof layer (1), thereby completing the processing of the fireproof sound-absorbing cotton product; Step five: installing the packaging frames (3) on the four edges of the fireproof sound-absorbing cotton product.

5. The manufacturing method of the environmentally friendly A-level fireproof sound-absorbing cotton according to claim 4, characterized in that: In step one, the heating and melting temperature of the high-temperature furnace is 1400 DEG C.

6. The manufacturing method of the environmentally friendly A-level fireproof sound-absorbing cotton according to claim 5, characterized in that: In step two, the pressure of the compressed air blowing technology is 0.5-0.8 MPa.

7. The manufacturing method of the environmentally friendly A-level fireproof sound-absorbing cotton according to claim 6, characterized in that: In step four, the thermal conductivity of the fireproof sound-absorbing cotton product is 0.0128 W / M.K. at a temperature of 500 DEG C.

Images