High-heat-resistance melt-blown cotton production device and high-heat-resistance melt-blown cotton prepared by same

Abstract

The invention discloses a high-heat-resistance melt-blown cotton production device and high-heat-resistance melt-blown cotton prepared through the high-heat-resistance melt-blown cotton production device, the device comprises a collecting net system, and a grid base cloth unwinding system is arranged in front of the collecting net system and is responsible for releasing wound grid base cloth to the collecting net system; grid base cloth tightening devices are arranged on the left side and the right side of the collecting net system and are used for tightening grid base cloth above the net surface of the collecting net system; a melt-blowing / spinning system is arranged above the collecting net system and is responsible for spraying melt-blowing fibers to the grid base cloth on the net surface; the collection net system promotes the sprayed melt-blown fibers to be gathered on the grid base cloth through negative pressure air in the collection net system. The three-dimensional cross warp spacer fabric is used as the grid base cloth, the superfine fibers are melt-blown on the grid base cloth, the superfine fibers are mutually bonded in gaps of the spacer fabric to form a special capillary structure attached to the three-dimensional grid yarn, mutual overlapping and pressing due to dead weight are avoided, melt-blown cotton with large thickness can be manufactured, and the high-thermal-resistance material is obtained.

Description

Technical Field

[0001] This invention belongs to the field of textile machinery technology, specifically relating to a high thermal resistance meltblown cotton production device and the high thermal resistance meltblown cotton prepared therefrom. Background Technology

[0002] Meltblown cotton is made primarily from polypropylene, formed through hot air stretching and self-bonding. The fiber diameter can reach 1-5 micrometers, with numerous pores, a loose structure, and good wrinkle resistance. Meltblown cotton possesses unique capillary-structured ultrafine fibers, which increase the number of fibers and surface area per unit area, thus giving it excellent filtration, shielding, heat insulation, and oil absorption properties. It can be used in air and liquid filtration materials, isolation materials, absorbent materials, mask materials, thermal insulation materials, oil-absorbing materials, and wiping cloths, among other applications.

[0003] When testing the performance of meltblown cotton as a thermal insulation material, for example, its thermal resistance value (in meters) is... 2 (K / W), referring to a certain industry standard, the thermal resistance of 40g meltblown cotton is 0.069, and that of 80g meltblown cotton is 0.124. This indicates that although the mass of meltblown cotton is doubled, the thermal resistance value, which is an important indicator of warmth retention, is not doubled. To produce meltblown cotton with high thermal resistance, simply increasing the mass of meltblown cotton is not sufficient and will not achieve the desired effect.

[0004] Analysis of the fiber structure of commonly used thermal insulation materials reveals that silk cotton has a better insulation effect than cotton because silk fibers are finer and have a higher specific surface area. Down has a better insulation effect, not because of its fine fibers, but rather because it contains coarser barbs and down clusters that hold the fine fibers in place, preventing them from stacking and compressing. These coarser barbs and down clusters interweave to support the fluffy structure. Meltblown cotton is comparable to down in terms of fiber fineness, but it lacks the coarser barbs and down clusters needed to support its fluffiness.

[0005] The manufacturing process of meltblown cotton determines the fineness and range of thickness variation of the meltblown fibers. Factors affecting the fineness and thickness distribution of meltblown fibers include raw materials, temperature, pressure, flow rate, die orifice diameter, orifice aspect ratio, temperature and pressure of the traction hot air, nozzle parameters formed by the air knife, and receiving distance. However, current research on meltblown fibers largely focuses on achieving fine and uniform fibers, as finer fibers result in a higher specific surface area, increasing filtration and adsorption performance, as well as improving thermal insulation properties. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a high thermal resistance meltblown cotton production device and the high thermal resistance meltblown cotton prepared therefrom, in order to solve the problem of excessive accumulation of fine fibers / microfibers due to their lack of ability to support a fluffy space.

[0007] To solve the above-mentioned technical problems and achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution: A high thermal resistance meltblown cotton production device mainly consists of a mesh base fabric unwinding system, a mesh base fabric tensioning device, a meltblown / spinning system, and a collection net system; The mesh base fabric unwinding system is located in front of the initial end of the travel of the collection net system and is responsible for releasing the rolled mesh base fabric to the collection net system; the mesh base fabric tensioning device is located on the left and right sides of the collection net system respectively and is responsible for tensioning the mesh base fabric located on the collection net system above the net surface of the collection net system, and can move along the travel with the net surface of the collection net system. The meltblown / spinning system is positioned above the collecting net system and is responsible for spraying meltblown fibers onto the mesh base fabric located on the net surface of the collecting net system. The collecting net system is filled with negative pressure air, which causes the meltblown fibers sprayed by the meltblown / spinning system to gather on the mesh base fabric located on the net surface of the collecting net system.

[0008] Furthermore, it also includes a vibration device, which is disposed on the left and right sides of the collection net system. The vibration device is responsible for driving the collection net system to vibrate, and the amplitude of the vibration of the collection net system is perpendicular to the net surface of the collection net system.

[0009] Furthermore, it also includes a powder spraying device, which is disposed above the collection net system and in front of the meltblown / spinning system, and is responsible for spraying aerogel powder onto the mesh base fabric located on the mesh surface of the collection net system.

[0010] Furthermore, the meltblown / spinning system includes multiple meltblown dies with different meltblown process parameters, which are responsible for producing different meltblown fibers.

[0011] Furthermore, the meltblown die head mainly includes a die head body, a spinneret, an air plate, and an excitation mechanism. The spinneret is detachably disposed on the lower surface of the die head body. Two air plates are symmetrically disposed on the left and right sides of the die tip of the spinneret, and are detachably connected to the lower surface of the die head body. An air gap is formed between the two air plates and the die tip of the spinneret. The excitation mechanism is movably disposed on the back side of the air gap surface of the air plate by means of a plug-in engagement. The excitation mechanism provides or removes excitation to the air plate by inserting into or pulling out of the air plate. Under the excitation action of the excitation mechanism, the front end of the air plate undergoes a small elastic deformation with a displacement on the order of tens to hundreds of micrometers, which in turn causes a corresponding small elastic deformation on the air gap surface. When the excitation of the excitation mechanism is removed, the shape of the air gap surface is restored.

[0012] Furthermore, the excitation mechanism includes at least one push plate body, on the front side of the push plate body, a plurality of parallel push rods are spaced apart along its length; the upper surface of the air plate is provided with a plurality of parallel grooves spaced apart along its length, one end of the groove forms an open structure on the rear side of the air plate, and the other end of the groove extends forward to the air gap surface; on the groove wall, near the air gap surface, at least one slit is provided, the lower end of the slit is a hole-shaped structure; the excitation mechanism cooperates with the air plate, and a plurality of the push rods are correspondingly inserted into a plurality of the grooves.

[0013] A high thermal resistance meltblown cotton is produced by spraying meltblown fibers onto a mesh base fabric using the aforementioned high thermal resistance meltblown cotton production device.

[0014] Furthermore, aerogel powder is uniformly bonded to the meltblown fiber by spraying.

[0015] Furthermore, the grid base fabric is a three-dimensional multi-layer spaced fabric, which includes n layers of orthogonally distributed warp and weft yarns, and n-1 layers of twisted warp yarns. The twisted warp yarns are twisted between the warp and weft yarns of adjacent layers to fix the warp and weft yarns at the interlacing points, and to form interlayer connections and supports, so that the three-dimensional multi-layer spaced fabric becomes a structurally stable three-dimensional grid; where n is a natural number ≥2.

[0016] Furthermore, the meltblown fibers are aggregated in the three-dimensional grid distribution of the yarns in the three-dimensional multilayer spacer fabric to form meltblown cotton of the same thickness as the three-dimensional multilayer spacer fabric.

[0017] The beneficial effects of this invention are as follows: This invention uses a three-dimensional twisted warp spacer fabric as a mesh base, on which ultrafine fibers are meltblown. These fibers bond together within the gaps in the spacer fabric, forming a unique capillary structure attached to the three-dimensional mesh yarns. This structure prevents the fibers from overlapping and crushing each other due to their own weight, allowing for the production of very thick meltblown cotton and resulting in a high thermal resistance material. In particular, aerogel powder can be added during the meltblowing process. The aerogel particles adhere to the still-warm meltblown fibers, creating a high thermal resistance material with even better performance.

[0018] The meltblown fabric die head of this invention features an adjustable air gap. An excitation mechanism is mounted behind the air gap surface of the air plate. Under the excitation of this mechanism, the front end of the air plate undergoes a slight elastic deformation, which in turn causes a slight elastic deformation of the air gap surface, thereby changing the air gap size, particularly the size at the airflow outlet. After the excitation is removed, the air gap surface of the air plate returns to its original state, and the air gap also returns to its original state. The air gap size of existing dies is 0.3 mm; adjustments ranging from tens to hundreds of micrometers show significant effects. The meltblown fabric die head of this invention has a positive effect on improving the performance indicators of meltblown fabric and provides an effective technical means for further developing new meltblown fabric products.

[0019] The technical solution of the present invention is not limited to making thermal insulation materials, but can also be used to make non-woven fabrics for various purposes such as filtration, absorption, isolation, and oil absorption.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of an embodiment of the high thermal resistance meltblown cotton production device of the present invention.

[0022] Figure 2 This is a schematic diagram of another embodiment of the high thermal resistance meltblown cotton production device of the present invention.

[0023] Figure 3 This is a schematic diagram of the air plate structure of an embodiment of the meltblown die head in the high thermal resistance meltblown cotton production device of the present invention.

[0024] Figure 4 This is a schematic diagram of the pusher plate in an embodiment of the meltblown die head of the high thermal resistance meltblown cotton production device of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the air plate and push plate after assembly in an embodiment of the high thermal resistance meltblown cotton production device of the present invention.

[0026] Figure 6 This is a schematic diagram of the air plate structure of another embodiment of the meltblown die head in the high thermal resistance meltblown cotton production device of the present invention.

[0027] Figure 7 This is a schematic diagram of the pusher plate in another embodiment of the meltblown die head in the high thermal resistance meltblown cotton production device of the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the air plate and push plate after assembly in another embodiment of the high thermal resistance meltblown cotton production device of the present invention.

[0029] Figure 9 This is a three-dimensional double-layer twisted warp interval magnified structural diagram of an embodiment of the mesh base fabric in the high thermal resistance meltblown cotton of the present invention.

[0030] Figure 10 This is a schematic diagram of the three-dimensional three-layer twisted warp spacing structure of another embodiment of the mesh base fabric in the high thermal resistance meltblown cotton of the present invention.

[0031] In the diagram: 1. Mesh base fabric unwinding system; 2. Mesh base fabric tensioning device; 3. Powder spraying device; 4. Meltblown / spinning system; 5. Mesh base fabric; 6. Collection net system; 7. Vibration device; 41. Meltblown die head; 411. Air plate; 412. Excitation mechanism; 413. Spinneret; 414. Die head body; 41101. Air gap surface; 41102. Groove; 41103. Gap; 41104. Front end; 41201. Push plate body; 41202. Push rod; 411031. Hole structure. Detailed Implementation

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the invention's purpose, features, and advantages. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but are merely illustrative of the essential spirit of the invention's technical solution.

[0033] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0034] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0035] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0036] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0037] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0038] See Figure 1 As shown, a high thermal resistance meltblown cotton production device mainly consists of a mesh base fabric unwinding system 1, a mesh base fabric tensioning device 2, a meltblown / spinning system 4, and a collecting net system 6. The mesh base fabric unwinding system 1 is located in front of the initial end of the travel of the collecting net system 6, responsible for releasing the rolled mesh base fabric 5 into the collecting net system 6. The mesh base fabric tensioning device 2 is respectively located on the left and right sides of the collecting net system 6, responsible for tensioning the mesh base fabric 5 located on the collecting net system 6 above the net surface of the collecting net system 6, and can move along the travel of the net surface of the collecting net system 6. The meltblown / spinning system 4 is located above the collecting net system 6, responsible for spraying meltblown fibers onto the mesh base fabric 5 located on the net surface of the collecting net system 6 through a meltblown die. The collecting net system 6 is filled with negative pressure air, which causes the meltblown fibers sprayed by the meltblown / spinning system 4 to gather on the mesh base fabric 5 located on the net surface of the collecting net system 6.

[0039] The high thermal resistance meltblown cotton production apparatus of the present invention further includes a vibration device 7, which is disposed on the left and right sides of the collection net system 6. The vibration device 7 is responsible for driving the collection net system 6 to vibrate, and the amplitude of the vibration of the collection net system 6 is perpendicular to the net surface of the collection net system 6.

[0040] The high thermal resistance meltblown cotton production apparatus of the present invention further includes a powder spraying device 3, which is disposed above the collection net system 6 and in front of the meltblown / spinning system 4, and is responsible for spraying aerogel powder onto the mesh base fabric 5 located on the mesh surface of the collection net system 6.

[0041] The working principle of the high thermal resistance meltblown cotton production device of the present invention is as follows: The rolled mesh base fabric 5 is unloaded at a uniform speed by the mesh base fabric unwinding system 1. The mesh base fabric tensioning device 2 uses the edge of the mesh base fabric to tighten the weft direction of the mesh base fabric 5 and pulls the mesh base fabric 5 to move with the mesh surface of the collecting net system 6. Negative pressure air is passed through the collecting net system 6, so that the meltblown fibers gather on the mesh base fabric 5 on the displaced net surface.

[0042] The meltblown / spinning system 4 sprays meltblown fibers onto the mesh base fabric 5 through a meltblown die. These fibers, under the action of airflow, fill and entwine within the three-dimensional mesh-like yarns of the mesh base fabric 5, forming a special capillary structure. The vibration device 7 drives the mesh surface to vibrate, with its amplitude perpendicular to the mesh surface, allowing the meltblown fibers to fill the mesh base fabric 7 more fully.

[0043] The powder spraying device 3 sprays aerogel powder. Since the meltblown fiber still has viscosity when it reaches the mesh base fabric 5, it can adhere the aerogel powder to the fiber surface. The aerogel powder that is not adhered is sucked away by the negative pressure air under the collection net. Example 2

[0044] See Figure 2 As shown, based on Example 1, the meltblown / spinning system 4 includes multiple meltblown dies 41 with different meltblown process parameters, which are responsible for producing different meltblown fibers. Example 3

[0045] See Figure 3-5As shown, based on Embodiments 1 and 2, this embodiment optimizes the structure of the meltblown die head 41, mainly by enabling the meltblown die head 41 to have an adjustable air gap function. The meltblown die head 41 mainly includes a die head body, a spinneret 413, an air plate 411, and an excitation mechanism 412. The spinneret 413 is detachably disposed on the lower surface of the die head body. Two air plates 411 are symmetrically disposed on the left and right sides of the die tip of the spinneret 413, and are detachably connected to the lower surface of the die head body. An air gap is formed between the air gap surface 41101 of the two air plates 411 and the die tip of the spinneret 413. The excitation mechanism 412 is movably disposed on the back side of the air gap surface 41101 of the air plate 411 in a plug-in manner. The excitation mechanism 412 provides or removes excitation to the air plate 1 by inserting into or pulling out of the air plate 411. Under the excitation action of the excitation mechanism 412, the front end 41104 of the air plate 411 undergoes a small elastic deformation with a displacement on the order of tens to hundreds of micrometers, which in turn causes the air gap surface 41101 to undergo a corresponding small elastic deformation. When the excitation of the excitation mechanism 412 is removed, the shape of the air gap surface 41101 is restored.

[0046] The excitation mechanism 412 includes a push plate body 41201. A plurality of parallel push rods 41202 are spaced along the length of the front side of the push plate body 41201. A plurality of parallel grooves 41102 are spaced along the length of the upper surface of the air plate 411. One end of each groove 41102 extends rearward to form an open structure on the rear side of the air plate 411, and the other end extends forward to the air gap surface 41101. A slit 41103 is formed on the groove wall of the groove 41102, near the air gap surface 41101. The push rods 41202 and the grooves 41102 are shaped to fit together, and a plurality of push rods 41202 are inserted into a plurality of grooves 41102.

[0047] The displacement force excitation action of the excitation mechanism 412 is driven by a corresponding drive device, which is an electric device or a pneumatic device. The drive device applies a controllable push or pull force to the excitation mechanism 412 in the insertion direction, thereby realizing the precise back-and-forth movement of the excitation mechanism 412 on the wind plate 411.

[0048] In this embodiment, when the push rod 41202 moves forward in the groove 41102, the excitation mechanism 412 excites the air plate 411. At this time, the front end 41104 of the air plate 411 will have a slight elastic deformation, thereby changing the air gap. Specifically, the two air plates 411 are installed symmetrically from left to right, and each air plate 411 has a corresponding excitation mechanism 412 inserted into its rear. When the excitation mechanism 412 is in the state of applying excitation to the air plate 411, the push rod 41202 is fully pushed into the groove 41102 and forms a thrust on the air gap surface 41101. Due to the gap 41103 on the groove 41102, the front end 41104 of the air plate 411 can produce a slight elastic deformation, thereby changing the tilt angle of the air gap surface 41101 and thus changing the air gap.

[0049] Conventional adjustment devices typically consist of two parts: a moving part and a stationary part. This creates a gap at the junction of the moving and stationary parts. The air gap 411 of this invention operates under high pressure and high temperature airflow conditions. Gaps in this system would cause hot air leakage, disrupting operating conditions. Therefore, the design challenge of the adjustable air gap device of this invention lies in maintaining the integrity and gaplessness of the air gap surface 41101 of the air gap 411 during adjustment. Existing mold heads have an air gap size of 0.3 mm, and adjustments in the tens to hundreds of micrometers range produce noticeable effects. Therefore, by utilizing the groove 41102 and the gap 41103 behind the air gap surface 41101 of the air gap 411, the overall mechanical properties of the air gap 411 are altered. Under the displacement and force application of the push plate 412, which cooperates with the groove 41102, the air gap surface 41101 of the air gap 411 undergoes a slight elastic deformation, thereby changing the air gap size, especially the size at the air outlet, which is the airflow outlet of the air gap, thus achieving the purpose of adjusting the air gap.

[0050] According to Hooke's Law, within the elastic range of a material, there is a linear relationship between stress and strain. In the above embodiment, the air gap decreases when excited. Of course, the push plate can also be designed as a "pull plate", and the air gap increases when excited. For example, electromagnetic attraction can be used to make the gap of the wind plate smaller, thus increasing the air gap. Example 4

[0051] See Figure 6-8As shown, based on Embodiment 3, the excitation mechanism 412 includes two push plate bodies 41201. A plurality of parallel push rods 41202 are spaced apart along the length of the front side of each push plate body 41201. A plurality of parallel grooves 41102 are spaced apart along the length of the upper surface of the wind plate 411. One end of each groove 41102 forms an open structure on the rear side of the wind plate 411, and the other end of the groove 41102... Extending forward to the air gap surface 41101; on the groove wall of the groove 41102, near the side of the air gap surface 41101, two slits 41103 are provided, and the lower end of the slits 41103 is a hole-shaped structure 411031; the push rod 41202 and the groove 41102 are matched with each other in shape, and after the two push plate bodies 41201 are overlapped, a number of push rods 41202 are inserted into a number of grooves 41102.

[0052] It can be deduced from this embodiment that there can be multiple push plate bodies 41201, each push plate body 41201 has an independent drive excitation mechanism, and multiple push plate bodies 41201 will have different air gap adjustment effects when excited individually or simultaneously. Example 5

[0053] A high thermal resistance meltblown cotton is produced by spraying meltblown fibers onto a mesh base fabric 5 using any one of the high thermal resistance meltblown cotton production devices in Examples 1-4, and aerogel powder is uniformly bonded to the meltblown fibers by spraying.

[0054] See Figure 9-10 As shown, the mesh base fabric 5 is a three-dimensional multi-layer spaced fabric, comprising n layers of orthogonally spaced warp and weft yarns, and n-1 layers of twisted warp yarns. These twisted warp yarns are interlaced at the warp and weft intersections of adjacent layers, fixing the warp and weft yarns at these intersections and forming interlayer connections and supports, thus making the three-dimensional multi-layer spaced fabric a structurally stable three-dimensional mesh; where n is a natural number ≥ 2. The meltblown fibers are aggregated within the three-dimensional mesh distribution of the three-dimensional multi-layer spaced fabric, forming meltblown cotton of the same thickness as the three-dimensional multi-layer spaced fabric.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high thermal resistance melt blown cotton production apparatus characterized by: It consists of a grid base fabric unwinding system (1), a grid base fabric tensioning device (2), a meltblown / spinning system (4), and a collection net system (6); The mesh base fabric unwinding system (1) is located in front of the initial end of the travel of the collection net system (6) and is responsible for releasing the rolled mesh base fabric (5) to the collection net system (6); the mesh base fabric tensioning device (2) is located on the left and right sides of the collection net system (6) respectively and is responsible for tensioning the mesh base fabric (5) located on the collection net system (6) above the net surface of the collection net system (6) and can move along the travel with the net surface of the collection net system (6); The meltblown / spinning system (4) is positioned above the collecting net system (6) and is responsible for spraying meltblown fibers onto the mesh base fabric (5) located on the mesh surface of the collecting net system (6). The collecting net system (6) is filled with negative pressure air, and the collecting net system (6) uses the negative pressure air inside to cause the meltblown fibers sprayed by the meltblown / spinning system (4) to gather on the mesh base fabric (5) located on the mesh surface of the collecting net system (6).

2. The high thermal resistance melt blown cotton production apparatus according to claim 1, characterized by: It also includes a vibration device (7), which is disposed on the left and right sides of the collection net system (6). The vibration device (7) is responsible for driving the collection net system (6) to vibrate, and the amplitude of the collection net system (6) is perpendicular to the net surface of the collection net system (6).

3. The high thermal resistance melt blown cotton production apparatus according to claim 1, characterized in that: It also includes a powder spraying device (3), which is located above the collection net system (6) and in front of the meltblown / spinning system (4), and is responsible for spraying aerogel powder onto the mesh base fabric (5) on the mesh surface of the collection net system (6).

4. The high thermal resistance melt blown cotton production apparatus according to claim 1, characterized by: The meltblown / spinning system (4) includes multiple meltblown dies (41) with different meltblown process parameters, which are responsible for producing different meltblown fibers.

5. The high thermal resistance meltblown cotton production apparatus according to claim 4, characterized in that: The meltblown die head (41) includes a die head body, a spinneret (413), an air plate (411), and an excitation mechanism (412). The spinneret (3) is detachably disposed on the lower surface of the die head body. Two air plates (411) are symmetrically disposed on the left and right sides of the die tip of the spinneret (3), and are detachably connected to the lower surface of the die head body. An air gap is formed between the two air plates (411) and the die tip of the spinneret (413). The excitation mechanism (412) is movably disposed on the air gap surface of the air plate (411) by means of a plug-in engagement. On the back of 41101), the excitation mechanism (412) provides or removes excitation to the air plate (411) by inserting into the air plate (411) or pulling out the air plate (411); under the excitation of the excitation mechanism (412), the front end (41104) of the air plate (411) produces a small elastic deformation with a displacement of tens to hundreds of micrometers, which in turn causes the air gap surface (41101) to produce a corresponding small elastic deformation; when the excitation of the excitation mechanism (412) is removed, the shape of the air gap surface (41101) is restored.

6. The high thermal resistance melt blown cotton production apparatus according to claim 5, characterized in that: The excitation mechanism (412) includes at least one push plate body (41201), and a plurality of parallel push rods (41202) are spaced apart along its length on the front side of the push plate body (41201); a plurality of parallel grooves (41102) are spaced apart along its length on the upper surface of the wind plate (411), and one end of each groove (41102) forms an open structure on the rear side of the wind plate (411). The other end of the groove (41101) extends forward to the air gap surface (41101); on the groove wall of the groove (41102), near the air gap surface (41101), at least one slit (41103) is provided, and the lower end of the slit (41103) is a hole structure (411031); the excitation mechanism (412) cooperates with the wind plate (411), and a number of push rods (41202) are inserted into a number of grooves (41102).

7. A high thermal resistance melt blown cotton characterized by: The high thermal resistance meltblown cotton is produced by spraying meltblown fibers onto a mesh base fabric using the high thermal resistance meltblown cotton production apparatus as described in any one of claims 1-6.

8. The high thermal resistance melt blown cotton of claim 7, wherein: Aerogel powder is uniformly bonded to the meltblown fiber by spraying.

9. The high thermal resistance melt blown cotton of claim 7 or 8, wherein: The grid base fabric is a three-dimensional multi-layer spaced fabric, which includes n layers of orthogonally distributed warp and weft yarns, and n-1 layers of twisted warp yarns. The twisted warp yarns are twisted between the warp and weft yarns of adjacent layers to fix the warp and weft yarns at the interlacing points and to form interlayer connections and supports, making the three-dimensional multi-layer spaced fabric a structurally stable three-dimensional grid; where n is a natural number ≥2.

10. The high thermal resistance melt blown cotton of claim 9, wherein: The meltblown fibers are aggregated in the three-dimensional grid distribution of the yarns of the three-dimensional multilayer spacer fabric to form meltblown cotton of the same thickness as the three-dimensional multilayer spacer fabric.

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