Sound insulation cotton and preparation process method

Abstract

The invention belongs to the technical field of automobile sound insulation cotton, and particularly relates to sound insulation cotton and a preparation process method.The sound insulation cotton comprises an upper cotton body, a lower cotton body, a supporting body, an adsorption filtering body, a first heat preservation foaming material and a second heat preservation foaming material; the upper end and the lower end of the supporting body are connected to the upper cotton body and the lower cotton body respectively. The adsorption filtering body is connected to the side end of the supporting body; a first cavity is formed among the adsorption filtering body, the supporting body and the upper cotton body; a second cavity is formed among the adsorption filter body, the support body and the lower cotton body; the first thermal insulation foaming material is connected to the interior of the first cavity; and the second thermal insulation foaming material is connected to the second cavity. Multiple heat preservation and sound insulation effects can be achieved, the overall structural compactness is improved, and the overall structural stability is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile sound insulation cotton, and in particular relates to sound insulation cotton and a preparation method thereof. Background Art

[0002] Car sound insulation cotton is one of the indispensable parts in automobile manufacturing. It has good heat insulation and sound insulation effects, thereby isolating the wind noise, tire noise and engine noise generated during the driving of the car, thereby improving the driving experience. Car sound insulation cotton is processed and produced through the steps of processing base material sound insulation layer, sheeting, hot refining, calendering, processing weather-resistant sound insulation layer, extrusion granulation, hot pressing molding, punching and shaping.

[0003] However, some existing sound insulation cottons only have good sound insulation effect, but poor heat insulation effect. In winter, the front hood is cold on the top and hot on the bottom, causing serious damage to the car paint and color difference with the car body; in summer, there is too much rain, and the temperature of the front hood will be too high and even smoke after driving for a long time. Summary of the invention

[0004] The purpose of the present invention is to provide a sound insulation cotton to solve any of the above-mentioned technical problems in view of the shortcomings of the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A sound insulation cotton comprises an upper cotton body, a lower cotton body, a support body, an adsorption filter body, a first thermal insulation foam material and a second thermal insulation foam material; the upper and lower ends of the support body are respectively connected to the upper cotton body and the lower cotton body; the adsorption filter body is connected to the side end of the support body; and a first cavity is provided between the adsorption filter body, the support body and the upper cotton body; a second cavity is provided between the adsorption filter body, the support body and the lower cotton body; the first thermal insulation foam material is connected to the inside of the first cavity; the second thermal insulation foam material is connected to the second cavity.

[0006] Preferably, the volume of the first thermal insulation foam material after foaming is greater than one nineteenth to one eighteenth of the volume of the first cavity; And / or, the volume of the second thermal insulation foam material after foaming is greater than one nineteenth to one eighteenth of the volume of the second cavity.

[0007] Preferably, the material of the support body, the material of the first thermal insulation foam material and the material of the second thermal insulation foam material are all the same; And / or, the support body is made of polyurethane foam material; the first thermal insulation foam material is made of polyurethane foam material; the second thermal insulation foam material is made of polyurethane foam material.

[0008] Preferably, at least one first sound-absorbing recess is provided on the surface of the upper cotton body facing the first thermal insulation foam material; at least one second sound-absorbing recess is provided on the surface of the lower cotton body facing the second thermal insulation foam material; and the projection of each first sound-absorbing recess toward the adsorption filter body is at least partially overlapped with the projection of each corresponding second sound-absorbing recess toward the adsorption filter body.

[0009] Preferably, the upper cotton body comprises a first base material and a first viscose layer stacked from outside to inside; the first viscose layer is respectively connected to the top of the first thermal insulation foam material and the top of the support body; And / or, the lower cotton body includes a second base material, a barrier film and a second viscose layer stacked in sequence from outside to inside; the second viscose layer is respectively connected to the bottom of the support body and the bottom of the second thermal insulation foam material.

[0010] Preferably, the adsorption filter body comprises a mesh plate and activated carbon; the mesh plate is connected to the inner side end of the support body; the activated carbon is arranged on a side surface of the mesh plate facing the upper cotton body; and the mesh diameter of the mesh plate is less than or equal to the width of each particle of the activated carbon; Wherein, at least two filling guide holes are provided in the support body; one of the filling guide holes is communicated with the first cavity; and the other filling guide hole is communicated with the second cavity.

[0011] The present invention also discloses a method for preparing sound insulation cotton, which is used to prepare the above-mentioned sound insulation cotton; wherein the method for preparing the sound insulation cotton comprises: S1. The raw materials are subjected to hot pressing, shaping, adhesion and gluing treatments on a jig to form an upper cotton body and a lower cotton body; S2, assembling the adsorption filter body between two support bodies to form an I-shaped intermediate body; S3, transporting the upper cotton body and the lower cotton body to a filling device; and using the intermediate body to perform reinforcement treatment between the upper cotton body and the lower cotton body; S4, using a filling device to fill the thermal insulation filling material to the upper and lower sides of the adsorption filter body to form a sound insulation cotton preliminary body of the first thermal insulation foam material and the second thermal insulation foam material; S5, heating and molding the preliminary body of the sound insulation cotton and cooling and discharging the materials to form a finished body of the sound insulation cotton.

[0012] Preferably, the steps of subjecting the raw materials to hot pressing, shaping, adhesion and gluing treatment on a jig include the following: The raw materials are subjected to a hot pressing and shaping process using a jig to form a first substrate and a second substrate; performing a barrier material bonding treatment on the second substrate to form an intermediate product of the barrier film adhered to the first substrate; The intermediate product and the first substrate are respectively subjected to a glue coating process to form an upper cotton body and a lower cotton body.

[0013] Preferably, the step of transferring the upper cotton body and the lower cotton body to a filling device; and using the intermediate body to perform a reinforcement treatment between the upper cotton body and the lower cotton body comprises the following: Transferring the lower cotton body to a workbench of a filling device; Transferring the I-shaped intermediate body to the upper surface of the lower cotton body on the workbench to form a preliminary bonding body; Transferring the upper cotton body 1 to the upper surface of the preliminary bonding body to form a preliminary frame body; Driving the upper pressing plate to move to the upper surface of the preliminary frame body to achieve extrusion positioning processing; The front and rear ends of the preliminary frame body are sealed and blocked.

[0014] Preferably, in S4, the filling amount of the thermal insulation filling material is greater than one twenty-first to one twentieth of the sum of the volumes of the first cavity and the second cavity; And / or, in S5, the heating and molding temperature is 150-180° C., the cooling temperature is 10-15° C., and the cooling time is 90 seconds.

[0015] The beneficial effects of the present invention are that the technical solution can further improve the thermal insulation performance of the sound insulation cotton by adopting the dual thermal insulation performance of the first thermal insulation foam material and the second thermal insulation foam material of the upper and lower layers, and the dual sound insulation performance of the upper cotton body and the lower cotton body of the upper and lower layers can further improve the sound insulation effect of the sound insulation cotton, thereby achieving multiple thermal insulation and sound insulation effects; and through the support body and the adsorption filter body of the middlemost layer, the overall structural compactness can be improved, the overall structural stability can be ensured, the use efficiency can be improved, and its service life can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following will refer to the attached Figures 1 to 4 To describe the features, advantages and technical effects of exemplary embodiments of the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of the sound insulation cotton according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the sound insulation cotton according to an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the sound insulation cotton according to an embodiment of the present invention Figure 4The present invention is a flowchart of a method for preparing sound insulation cotton according to an embodiment of the present invention.

[0018] In the figure: 1-upper cotton body; 11-first sound-absorbing recess; 101-first substrate; 102-first viscose layer; 103-first cavity; 104-second cavity; 2-lower cotton body; 21-second sound-absorbing recess; 201-second viscose layer; 202-barrier film; 203-second substrate; 3-support body; 31-filling guide hole; 32-installation groove; 4-adsorption filter body; 41-mesh plate; 42-activated carbon; 5-first thermal insulation foam material; 6-second thermal insulation foam material. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0020] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0023] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0024] The following is combined with Figure 1 to Figure 4 The present invention is further described in detail, but is not intended to limit the present invention.

[0025] like Figure 1 and 2 As shown, in one embodiment of the present invention, the sound insulation cotton comprises an upper cotton body 1, a lower cotton body 2, a support body 3, an adsorption filter body 4, a first thermal insulation foam material 5 and a second thermal insulation foam material 6; the upper and lower ends of the support body 3 are respectively connected to the upper cotton body 1 and the lower cotton body 2; the adsorption filter body 4 is connected to the side end of the support body 3; and a first cavity 103 is provided between the adsorption filter body 4, the support body 3 and the upper cotton body 1; a second cavity 104 is provided between the adsorption filter body 4, the support body 3 and the lower cotton body 2; the first thermal insulation foam material 5 is connected to the inside of the first cavity 103; the second thermal insulation foam material 6 is connected to the second cavity 104.

[0026] The technical solution of the present invention can further improve the thermal insulation performance of the sound insulation cotton by adopting the dual thermal insulation performance of the first thermal insulation foam material and the second thermal insulation foam material of the upper and lower layers, and the dual sound insulation performance of the upper cotton body and the lower cotton body of the upper and lower layers can further improve the sound insulation effect of the sound insulation cotton, thereby achieving multiple thermal insulation and sound insulation effects; and through the support body and the adsorption filter body of the middle layer, the overall structural compactness can be improved, the overall structural stability can be ensured, the use efficiency can be improved, and its service life can be extended.

[0027] Specifically, in some embodiments, the volume of the first thermal insulation foam material 5 after foaming is greater than one nineteenth to one eighteenth of the volume of the first cavity 103; and / or, the volume of the second thermal insulation foam material 6 after foaming is greater than one nineteenth to one eighteenth of the volume of the second cavity 104. In other words, the bubbles generated by the first thermal insulation foam material 5 and the second thermal insulation foam material 6 during the filling process can be effectively discharged through the filling amount within a certain range, and the expansion due to excessive amount can be avoided, thereby improving the structural stability and ensuring the processing safety.

[0028] Specifically, in some embodiments, the material of the support body 3, the material of the first thermal insulation foam material 5, and the material of the second thermal insulation foam material 6 are all the same. Among them, the support body 3 is made of polyurethane foam material; the first thermal insulation foam material 5 is made of polyurethane foam material; the second thermal insulation foam material 6 is made of polyurethane foam material. Further, the polyurethane foam material includes polyether polyol or polyester polyol, isocyanate, foaming agent, catalyst, surfactant, etc.; wherein the catalyst is bis (dimethylaminoethyl) ether; the stabilizer is dodecyl polyoxyethylene ether or alkyl alcohol amide; the foaming agent is sodium bicarbonate or sodium carbonate or ammonium carbonate. Through the support body 3 and the first thermal insulation foam material 5 and the second thermal insulation foam material 6 of the same material, the two can be integrated with each other during the foaming process, thereby further improving the overall structural stability and improving the thermal insulation efficiency. Furthermore, the mass of polyether polyol: the mass of isocyanate: the mass of blowing agent: the mass of catalyst: the mass of surfactant = (98-100): (8.8-9.8): (5.8-7.7): (10.0-12): (12.0-13.8). Among them, the mass of polyester polyol: the mass of isocyanate: the mass of blowing agent: the mass of catalyst: the mass of surfactant = (99-103): (8.8-9.8): (5.8-7.7): (10.0-12): (12.0-13.8). Among them, as Figure 1 and 2 As shown, at least two filling guide holes 31 are provided in the support body 3 ; one of the filling guide holes 31 is communicated with the first cavity 103 ; and the other filling guide hole 31 is communicated with the second cavity 104 .

[0029] Specifically, in some embodiments, Figure 1 and 2As shown, the surface of the upper cotton body 1 on one side facing the first thermal insulation foam material 5 is provided with at least one V-shaped or U-shaped first sound-absorbing recess 11; the surface of the lower cotton body 2 on one side facing the second thermal insulation foam material 6 is provided with at least one V-shaped or U-shaped second sound-absorbing recess 21; and the projection of each first sound-absorbing recess 11 toward the adsorption filter body 4 and the projection of each corresponding second sound-absorbing recess 21 toward the adsorption filter body 4 are at least partially overlapped. That is to say, the sound-absorbing effect can be further improved by the overlap of the upper and lower recesses and the refraction sound-absorbing, thereby improving the sound insulation efficiency. Among them, in some embodiments, the overlap rate between the projection of each first sound-absorbing recess 11 toward the adsorption filter body 4 and the projection of each corresponding second sound-absorbing recess 21 toward the adsorption filter body 4 is seventy to ninety-five percent. That is to say, the projections of the recesses at the upper and lower ends overlap but are not completely overlapped, thereby improving the refraction effect of sound propagation, thereby improving the sound insulation efficiency. Further, in some embodiments, as Figure 3 As shown, the first silencing recess 11 is a V-shaped silencing recess, and the upper end of the first silencing recess 11 is provided with a fold angle α, and the α satisfies: 80º≤α≤120º; it can be 80º, 85º, 90º, 95º, 120º. Preferably, it is 90 º or 120 º. The second silencing recess 11 is a V-shaped silencing recess, and the upper end of the second silencing recess 21 is provided with a fold angle β, and the β satisfies: 80º≤β≤120º; it can be 80º, 85º, 90º, 95º, 120º. Preferably, it is 90 º or 120º.

[0030] Specifically, in some embodiments, Figure 1 and 2 As shown, the upper cotton body 1 includes a first substrate 101 and a first viscose layer 102 stacked from outside to inside; the first viscose layer 102 is respectively connected to the top of the first thermal insulation foam material 5 and the top of the support body 3. In some embodiments, the first substrate 101 is made of LC-Opselor sponge or PE sponge; the first viscose layer 102 is made of fiber materials such as modal or matte silk or artificial wool. The air permeability and sound insulation effect of the upper cotton body can achieve the exhaust effect during the foaming molding process of the first thermal insulation foam material 5 and the second thermal insulation foam material 6; thereby improving the safety and stability of production and processing; and reducing the excessive gaps or bubbles in the thermal insulation filling material.

[0031] Specifically, in some embodiments, Figure 1 and 2As shown, the lower cotton body 2 includes a second substrate 203, a barrier film 202 and a second viscose layer 201 which are stacked in sequence from the outside to the inside; the second viscose layer 201 is respectively connected to the bottom of the support body 3 and the bottom of the second thermal insulation foam material 6. Among them, the second substrate 203 is made of LC-Opticell sponge or PE sponge; the barrier film 202 is made of high-density polyethylene (HDPE) or high-density polypropylene (HDPP); the second viscose layer 201 is made of fiber materials such as modal, matte silk or artificial wool.

[0032] Specifically, in some embodiments, Figure 1 and 2 As shown, the adsorption filter body 4 includes a mesh plate 41 and activated carbon 42; the mesh plate 41 is connected to the inner side end of the support body 3; the activated carbon 42 is arranged on the side surface of the mesh plate 41 facing the upper cotton body 1; and the mesh diameter of the mesh plate 41 is less than or equal to the width of each particle of the activated carbon. Among them, the mesh plate 41 uses a PVC mesh plate; the inner side end of the support body 3 is provided with a mounting groove 32; the mesh plate 41 is snapped onto the inner wall of the mounting groove 32. This structure is equipped with a large number of activated carbon 42 particles through the upper half of the mesh plate 41 to avoid the phenomenon of the activated carbon 42 particles falling off and scattering during the assembly process; and it can also ensure the adsorption and filtration performance of its activated carbon. In addition, the first thermal insulation foaming material 5 and the second thermal insulation foaming material 6 promote the assembly between the activated carbon 42 particles and the mesh plate 41 during the foaming process, and fill the gap between the activated carbon 42 particles and the mesh plate 41, so as to effectively discharge the bubbles generated by the first thermal insulation foaming material 5 and the second thermal insulation foaming material 6 during the filling process, and avoid expansion due to excessive quantity, thereby improving the structural stability and ensuring the processing safety.

[0033] The present invention also proposes a method for preparing sound insulation cotton. The method for preparing sound insulation cotton is used for the method for preparing sound insulation cotton. The specific structure of the sound insulation cotton refers to the above-mentioned embodiment. Since the method for preparing sound insulation cotton adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0034] Among them, Figure 4 As shown, the preparation process of the sound insulation cotton comprises: S1. The raw materials are subjected to hot pressing, shaping, adhesion and gluing treatments on a jig to form an upper cotton body and a lower cotton body; S2, assembling the adsorption filter body between two support bodies to form an I-shaped intermediate body; S3, transporting the upper cotton body and the lower cotton body to a filling device; and using the intermediate body to perform reinforcement treatment between the upper cotton body and the lower cotton body; S4, using a filling device to fill the thermal insulation filling material to the upper and lower sides of the adsorption filter body to form a sound insulation cotton preliminary body of the first thermal insulation foam material and the second thermal insulation foam material; S5, heating and molding the preliminary body of the sound insulation cotton and cooling and discharging the materials to form a finished body of the sound insulation cotton.

[0035] Specifically, in some embodiments, in S1, the step of subjecting the raw materials to hot pressing, shaping, adhesion, and gluing with a jig includes the following: The raw materials are subjected to a hot pressing and shaping process with a jig to form a first substrate 101 and a second substrate 203; wherein the raw materials are sent into an oven for baking and softening, the temperature of the heating zone of the oven is 160°C to 180°C, and the baking time is 120 s to 140 s; the raw materials after baking and softening are pressed and cooled to form the first substrate 101 and the second substrate 203; during the pressing and cooling molding, the molding pressure is 10 to 12 MPa, the molding time is 50 to 80 s, the cooling temperature is 18 to 25°C, and the cooling time is 40 s; Performing a barrier material bonding treatment on the second substrate 203 to form an intermediate product of the barrier film 202 being adhered to the first substrate; The intermediate product and the first substrate 101 are respectively subjected to glue coating treatment to form an upper cotton body 1 and a lower cotton body 2; that is, an upper cotton body 1 having a first viscose layer 102 attached to the first substrate 101 and a lower cotton body 2 having a barrier film 202 and a second viscose layer 201 attached to the second substrate 203 in sequence are formed.

[0036] Specifically, in some embodiments, in S2, the step of assembling the adsorption filter body between two support bodies to form an I-shaped intermediate body includes the following: The two side ends of the adsorption filter body 4 are respectively clamped in the mounting grooves 32 of the inner side walls of two different support bodies 3, and the support body 3 and the adsorption filter body 4 are sealed with glue to form an I-shaped intermediate body.

[0037] Specifically, in some embodiments, in S3, the step of transporting the upper cotton body and the lower cotton body to a filling device; and using the intermediate body to perform a reinforcement treatment between the upper cotton body and the lower cotton body, includes the following: Transferring the lower cotton body 2 to a workbench of a filling device; Transferring the I-shaped intermediate body to the upper surface of the lower cotton body 2 on the workbench to form a preliminary bonding body; Transferring the upper cotton body 1 to the upper surface of the preliminary bonding body to form a preliminary frame body; Driving the upper pressing plate to move to the upper surface of the preliminary frame body to achieve extrusion positioning processing; The front and rear ends of the preliminary frame body are sealed and blocked to avoid leakage of the thermal insulation filling material during the filling process, thereby ensuring the orderliness of the processing and saving materials.

[0038] Specifically, in some embodiments, in S4, the step of using a filling device to fill the thermal insulation filling material to the upper and lower sides of the adsorption filter body includes the following: The thermal insulation filling material is poured into the filling guide holes 31 on the upper and lower sides of the support body by using a filling device, so that the upper and lower sides of the adsorption filter body are filled with the thermal insulation filling material; wherein the filling amount of the thermal insulation filling material is greater than one twenty-first to one twentieth of the sum of the volumes of the first cavity and the second cavity. In other words, through a relatively large filling amount, the formation of an extruded volume of one nineteenth to one eighteenth after foaming can be achieved.

[0039] Specifically, in some embodiments, in the step of heating and molding the initial sound insulation cotton body and cooling and discharging the initial sound insulation cotton body in S5, The heating molding temperature is 150-180°C, the cooling temperature is 10-15°C, and the cooling time is 90s.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0041] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs can also change and modify the above embodiment. Therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present invention belongs to the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A sound insulation cotton, characterized by: It includes an upper cotton body, a lower cotton body, a support body, an adsorption filter body, a first thermal insulation foam material and a second thermal insulation foam material; the upper and lower ends of the support body are respectively connected to the upper cotton body and the lower cotton body; the adsorption filter body is connected to the side end of the support body; and a first cavity is provided between the adsorption filter body, the support body and the upper cotton body; a second cavity is provided between the adsorption filter body, the support body and the lower cotton body; the first thermal insulation foam material is connected to the inside of the first cavity; and the second thermal insulation foam material is connected to the second cavity.

2. The sound insulation cotton according to claim 1, characterized in that: The volume of the first thermal insulation foam material after foaming is greater than one nineteenth to one eighteenth of the volume of the first cavity; And / or, the volume of the second thermal insulation foam material after foaming is greater than one nineteenth to one eighteenth of the volume of the second cavity.

3. The sound insulation cotton according to claim 1, characterized in that: The material of the support body, the material of the first thermal insulation foam material and the material of the second thermal insulation foam material are all the same; And / or, the support body is made of polyurethane foam material; the first thermal insulation foam material is made of polyurethane foam material; the second thermal insulation foam material is made of polyurethane foam material.

4. The sound insulation cotton according to claim 1, characterized in that: At least one first sound-absorbing recess is provided on the surface of the upper cotton body facing the first thermal insulation foam material; at least one second sound-absorbing recess is provided on the surface of the lower cotton body facing the second thermal insulation foam material; and the projection of each first sound-absorbing recess toward the adsorption filter body is at least partially overlapped with the projection of each corresponding second sound-absorbing recess toward the adsorption filter body.

5. The sound insulation cotton according to claim 3, characterized in that: The upper cotton body comprises a first base material and a first viscose layer stacked from outside to inside; the first viscose layer is respectively connected to the top of the first thermal insulation foam material and the top of the support body; And / or, the lower cotton body includes a second base material, a barrier film and a second viscose layer stacked in sequence from outside to inside; the second viscose layer is respectively connected to the bottom of the support body and the bottom of the second thermal insulation foam material.

6. The sound insulation cotton according to claim 1, characterized in that: The adsorption filter body includes a mesh plate 41 and activated carbon; the mesh plate is connected to the inner side end of the support body; the activated carbon is arranged on a side surface of the mesh plate facing the upper cotton body; and the mesh diameter of the mesh plate is less than or equal to the width of each particle of the activated carbon; Wherein, at least two filling guide holes are provided in the support body; one of the filling guide holes is communicated with the first cavity; and the other filling guide hole is communicated with the second cavity.

7. A preparation process for sound insulation cotton, characterized in that: Used to make the sound insulation cotton according to claims 1 to 6 above; wherein the preparation process of the sound insulation cotton comprises: S1. The raw materials are subjected to hot pressing, shaping, adhesion and gluing treatments on a jig to form an upper cotton body and a lower cotton body; S2, assembling the adsorption filter body between two support bodies to form an I-shaped intermediate body; S3, transporting the upper cotton body and the lower cotton body to a filling device; and using the intermediate body to perform reinforcement treatment between the upper cotton body and the lower cotton body; S4, using a filling device to fill the thermal insulation filling material to the upper and lower sides of the adsorption filter body to form a sound insulation cotton preliminary body of the first thermal insulation foam material and the second thermal insulation foam material; S5, heating and molding the preliminary body of the sound insulation cotton and cooling and discharging the materials to form a finished body of the sound insulation cotton.

8. The method for preparing the sound insulation cotton according to claim 7, characterized in that: The steps of subjecting the raw materials to hot pressing, shaping, adhesion and gluing with a jig include the following: The raw materials are subjected to a hot pressing and shaping process using a jig to form a first substrate and a second substrate; performing a barrier material bonding treatment on the second substrate to form an intermediate product of the barrier film adhered to the first substrate; The intermediate product and the first substrate are respectively subjected to a glue coating process to form an upper cotton body and a lower cotton body.

9. The method for preparing the sound insulation cotton according to claim 7, characterized in that: The step of transferring the upper cotton body and the lower cotton body to a filling device and using the intermediate body to perform a reinforcement treatment between the upper cotton body and the lower cotton body includes the following: Transferring the lower cotton body to a workbench of a filling device; Transferring the I-shaped intermediate body to the upper surface of the lower cotton body on the workbench to form a preliminary bonding body; Transferring the upper cotton body 1 to the upper surface of the preliminary bonding body to form a preliminary frame body; Driving the upper pressing plate to move to the upper surface of the preliminary frame body to achieve extrusion positioning processing; The front and rear ends of the preliminary frame body are sealed and blocked.

10. The method for preparing the sound insulation cotton according to claim 7, characterized in that: In S4, the filling amount of the thermal insulation filling material is greater than one twenty-first to one twentieth of the sum of the volumes of the first cavity and the second cavity; And / or, in S5, the heating and molding temperature is 150-180° C., the cooling temperature is 10-15° C., and the cooling time is 90 seconds.

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