CN114179450A - Preparation method of fiber-based multilayer noise-reducing flexible composite material - Google Patents

Preparation method of fiber-based multilayer noise-reducing flexible composite material Download PDF

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Publication number
CN114179450A
CN114179450A CN202111514782.7A CN202111514782A CN114179450A CN 114179450 A CN114179450 A CN 114179450A CN 202111514782 A CN202111514782 A CN 202111514782A CN 114179450 A CN114179450 A CN 114179450A
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fiber
coating
polyurethane
based multilayer
composite material
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赵晓明
彭敏
刘元军
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Tianjin Polytechnic University
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Tianjin Polytechnic University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/003—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/12—Spreading-out the material on a substrate, e.g. on the surface of a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/36—Feeding the material on to the mould, core or other substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/46—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2201/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels
    • B32B2607/02—Wall papers, wall coverings

Abstract

The invention discloses a preparation method of a fiber-based multilayer noise-reducing flexible composite material. The preparation steps are as follows: (1) and adding a foaming agent and a foam stabilizer to prepare the polyurethane foaming film in a mechanical foaming mode. (2) And adding carbon fiber powder, and preparing the polyurethane/carbon fiber powder composite membrane in a mechanical stirring and coating mode. (3) And performing multilayer compounding on the polyurethane foaming film, the fiber felt, the woven fabric and the polyurethane/carbon fiber powder composite film to successfully prepare the fiber-based multilayer noise-reducing flexible composite material. Tests prove that the noise reduction composite material provided by the preparation method provided by the invention has the advantages of good sound absorption performance, sound insulation performance, mechanical property, adjustable sound absorption resonance peak and the like, and simultaneously keeps the thin and soft characteristics of the fiber felt.

Description

Preparation method of fiber-based multilayer noise-reducing flexible composite material
Technical Field
The invention belongs to the field of acoustic functional materials for sound absorption and noise reduction, and particularly relates to a preparation method of a fiber-based multilayer noise-reducing flexible composite material.
Background
The development of global industrialization and the promotion of urbanization progress bring great convenience to the life of people, but a plurality of environmental problems also appear at the same time. Noise has been seen as a serious environmental problem worldwide, with water pollution, atmospheric pollution and solid waste pollution and is today known as four major pollutants. The world health organization has reported that, besides affecting the auditory system of a person, the harm caused by noise may cause various diseases such as hypertension, heart disease, memory deterioration, attention deficit, respiratory system, circulatory system and other mental syndromes, thereby shortening the life of the person. Noise pollution not only seriously affects human health and life, but also causes damage to surrounding living things and buildings to various degrees. Excessive noise can accelerate the aging speed of buildings and mechanical structures, and the precision and the service life of equipment and instruments are influenced, so that a lot of potential dangers and unnecessary maintenance cost are caused.
The fiber product is one of common sound absorption materials and has wide application in the fields of building, transportation, aerospace and the like. The sound absorption effect of the fiber material depends on the thickness of the fiber material, and the thickness of the fiber material is usually required to be more than 20mm to achieve a good sound absorption effect. The thinner fiber material has the disadvantages of unsatisfactory sound absorption effect, basically no sound insulation performance, low strength, poor stability and inconvenience for installation, and the same fiber material has fixed sound absorption frequency and non-adjustability. The use of a single fibrous material as the sound absorbing material has many limitations.
The invention aims to overcome the defects of thicker thickness, poor sound insulation performance, strength and stability and fixed resonance frequency of the fiber material, and provides a preparation method of a fiber-based multilayer noise-reduction flexible composite material, which can greatly improve the sound absorption, sound insulation and mechanical properties of a fiber felt while keeping the characteristics of lightness, thinness and softness of the fiber felt.
Disclosure of Invention
The invention provides a preparation method of a fiber-based multilayer noise-reducing flexible composite material for solving the technical problems.
The fiber-based multilayer noise-reduction flexible composite material is prepared by adopting the processes of mechanical foaming, coating and multilayer compounding, and comprises a fiber felt, a fabric, a polyurethane foaming film and a polyurethane/carbon fiber powder composite film.
The foaming film coating comprises the following components in parts by weight: aqueous polyurethane: 100 parts by weight; foaming agent: 4 parts by weight; foam stabilizer: 1 part by weight; thickening agent: 0 to 5 weight portions.
The foaming rate of the coating of the foaming film is 100-350%.
The polyurethane/carbon fiber powder composite film coating comprises the following components in parts by weight: aqueous polyurethane: 100 parts by weight; carbon fiber powder: 10-70 parts by weight; defoaming agent: 1 part by weight; dispersing agent: 1 part by weight; leveling agent: 1 part by weight; thickening agent: 0 to 5 weight portions.
The waterborne polyurethane disclosed by the invention is PU-2540, semitransparent emulsion, solid powder 40 +/-1 and viscosity (25 ℃, mPa.S) of less than 300.
The thickener is a water-based thickener, the main component of the thickener is a polyurethane compound, the pH value is 7.0 +/-0.1, and the viscosity is less than or equal to 3000CPS/25 ℃.
In the invention, the foaming agent is sodium dodecyl sulfate, the dispersing agent is HTK-5040, the flatting agent is RM-2020, and the defoaming agent is AFE-1410.
The foam stabilizer is an alcohol ether modified polyhydroxy polymer, the active matter content is 55 +/-2%, and the pH value is 6.5-8.5.
The carbon fiber powder has the particle size of 400 meshes.
The fiber felt is any fiber felt with the thickness less than 4 mm.
The woven fabric is any woven fabric with high strength.
The invention also provides a preparation method of the fiber-based multilayer noise-reducing flexible composite material, which comprises the following steps.
(1) Preparing a polyurethane foaming film: and (2) placing the beaker filled with the polyurethane on a high-speed dispersion machine, stirring at the rotating speed of 800r/min, sequentially adding the sodium dodecyl sulfate, the alcohol ether modified polyhydroxy polymer and the thickening agent in the stirring process, adjusting the stirring speed to 1200r/min after the addition is finished, and stopping stirring after foaming to the required multiplying power. And (3) placing the prepared foam coating liquid at the initial position of a coating rod, adjusting the thickness of the coating to be 1mm, starting a coating machine after the setting is finished, and uniformly coating the coating liquid on the surface of the metal plate under the action of the coating rod. And after the coating is finished, placing the material in a blast drying oven preheated to 70 ℃ for drying, stopping drying after 15min, demolding the foamed film material, and taking down the foamed film material for later use.
(2) Preparing a polyurethane/carbon fiber powder composite film: and (3) placing the beaker filled with the polyurethane on a high-speed dispersion machine, stirring at the rotating speed of 1200r/min, sequentially adding the carbon fiber powder, the leveling agent, the dispersing agent and the defoaming agent in the stirring process, and after the addition is finished, adjusting the rotating speed of the dispersion machine to 1500r/min, and continuing to disperse for 30min until the mixture is uniformly dispersed. Adding a certain amount of thickening agent into the beaker, stirring for 5min, and closing the dispersion machine. Placing the beaker in a vacuum drying oven for defoaming treatment to successfully prepare the coating solution. And (3) placing the prepared coating liquid at the initial position of a coating rod, adjusting the thickness of the coating to be 1mm, starting a coating machine after the setting is finished, and uniformly coating the coating liquid on the surface of the metal plate under the action of the coating rod. And after the coating is finished, placing the material in a blast drying oven preheated to 70 ℃ for drying, stopping drying after 15min, demolding the film material, and taking down the film material for later use.
(3) Preparing a fiber-based multilayer noise-reducing flexible material: and (3) sequentially compounding the polyurethane foam film prepared in the step (1), the prepared fiber felt and the fabric with the polyurethane/carbon fiber powder composite film prepared in the step (2), and thus, finishing the preparation of the fiber-based multilayer noise-reduction flexible material.
The invention has the beneficial effects that: the invention carries out composite finishing on the polyurethane foaming film, the fiber felt, the fabric, the polyurethane and the carbon fiber powder composite film, overcomes the defect that one kind or one kind of material is used alone to hardly meet the requirements of thinness, lightness, width and strength, and obtains good noise reduction effect and mechanical property.
The mechanical foaming and coating process selected by the invention is simple in technology and convenient to operate, and the obtained product has good sound absorption performance, sound insulation performance and mechanical performance while keeping the characteristics of lightness, thinness and softness of the fiber felt, and can be widely applied to the fields of household decoration such as wall cloth, automobile noise reduction pads and the like.
Drawings
FIG. 1 is a diagram of a process for preparing a fiber-based multilayer noise-reducing flexible material prepared in the embodiment.
FIG. 2 is a graph showing the sound absorption performance of the fiber-based multilayer noise-reducing flexible material prepared in the example.
FIG. 3 is a graph showing the sound insulation performance of the fiber-based multilayer noise-reducing flexible material prepared in the example.
FIG. 4 is a graph of mechanical property detection data of the fiber-based multilayer noise-reducing flexible material manufactured in the embodiment.
Detailed Description
The invention provides a preparation method of a fiber-based multilayer noise-reducing flexible material, and the invention is further explained by combining a specific embodiment.
Example 1.
The fiber-based multilayer noise-reducing flexible material in the embodiment is prepared by adopting the processes of mechanical foaming, coating and multilayer compounding, and comprises a fiber felt, a fabric, a polyurethane foam film and a polyurethane/carbon fiber powder composite film.
The coating of the polyurethane foaming film comprises the following components in parts by weight: 100 parts by weight of waterborne polyurethane, 4 parts by weight of foaming agent, 1 part by weight of foam stabilizer and 2.5 parts by weight of thickening agent.
Wherein the fiber felt is activated carbon fiber felt with a thickness of 2mm and a specific surface area of 1300m2/g。
Wherein the fabric is a plain woven fabric.
The coating of the polyurethane/carbon fiber powder composite film comprises the following components in parts by weight: 100 parts by weight of waterborne polyurethane, 60 parts by weight of carbon fiber powder, 1 part by weight of defoaming agent, 1 part by weight of dispersing agent, 1 part by weight of flatting agent and 2 parts by weight of thickening agent.
The specific preparation steps are as follows.
(1) Preparing a polyurethane foaming film: and (3) placing the beaker filled with polyurethane on a high-speed dispersion machine, stirring at the rotating speed of 800r/min, sequentially adding a foaming agent, a foam stabilizer and a thickening agent in the stirring process, adjusting the stirring speed to 1200r/min after the addition is finished, and stopping stirring when the foaming rate is 200%. And (3) placing the prepared foam coating liquid at the initial position of a coating rod, adjusting the thickness of the coating to be 1mm, starting a coating machine after the setting is finished, and uniformly coating the coating liquid on the surface of the metal plate under the action of the coating rod. And after the coating is finished, placing the material in a blast drying oven preheated to 70 ℃ for drying, stopping drying after 15min, demolding the foamed film material, and taking down the foamed film material for later use.
(2) Preparing a polyurethane/carbon fiber powder composite film: and (3) placing the beaker filled with the polyurethane on a high-speed dispersion machine, stirring at the rotating speed of 1200r/min, sequentially adding the carbon fiber powder, the leveling agent, the dispersing agent and the defoaming agent in the stirring process, and after the addition is finished, adjusting the dispersion machine to 1500r/min, and continuing to disperse for 30min until the mixture is uniformly dispersed. Adding a certain amount of thickening agent into a beaker, stirring for 5 minutes, and then closing the dispersing machine. And placing the beaker in a vacuum drying oven for vacuumizing and defoaming treatment to successfully prepare the coating solution. And (3) placing the prepared coating liquid at the initial position of a coating rod, adjusting the thickness of the coating to be 1mm, starting a coating machine after the setting is finished, and uniformly coating the coating liquid on the surface of the metal plate under the action of the coating rod. And after the coating is finished, placing the material in a blast drying oven preheated to 70 ℃ for drying, stopping drying after 15min, demolding the film material, and taking down the film material for later use.
(3) Preparing a fiber-based multilayer noise-reducing flexible material: and (3) sequentially compounding the polyurethane foam film, the fiber felt and the fabric prepared in the step (1) and the polyurethane/carbon fiber powder composite film prepared in the step (2), and thus, finishing the preparation of the fiber-based multilayer noise reduction flexible material.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (12)

1. A preparation method of a fiber-based multilayer noise-reducing flexible composite material is characterized by comprising the following steps: the material is prepared by adopting the processes of mechanical foaming, coating and multilayer compounding, and consists of a fiber felt, a fabric, a polyurethane foaming film and a polyurethane/carbon fiber powder composite film.
2. The method for preparing the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 1, wherein the method comprises the following steps: (1) preparing a polyurethane foaming film: and (3) placing the beaker filled with polyurethane on a high-speed dispersion machine, stirring at the rotating speed of 800r/min, sequentially adding a foaming agent, a foam stabilizer and a thickening agent in the stirring process, adjusting the stirring speed to 1200r/min after the addition is finished, and stopping stirring after foaming to the required multiplying power. And (3) placing the prepared foam coating liquid at the initial position of a coating rod, adjusting the thickness of the coating to be 1mm, starting a coating machine after the setting is finished, and uniformly coating the coating liquid on the surface of the metal plate under the action of the coating rod. And after the coating is finished, placing the material in a blast drying oven preheated to 70 ℃ for drying, stopping drying after 15min, demolding the foamed film material, and taking down the foamed film material for later use. (2) Preparing a polyurethane/carbon fiber powder composite film: and (3) placing the beaker filled with the polyurethane on a high-speed dispersion machine, stirring at the rotating speed of 1200r/min, sequentially adding the carbon fiber powder, the leveling agent, the dispersing agent and the defoaming agent in the stirring process, and after the addition is finished, adjusting the rotating speed of the dispersion machine to 1500r/min, and continuing to disperse for 30min until the mixture is uniformly dispersed. Adding a certain amount of thickening agent into the beaker, stirring for 5min, and closing the dispersion machine. And placing the beaker in a vacuum drying oven for vacuumizing and defoaming treatment to successfully prepare the coating solution. And (3) placing the prepared coating liquid at the initial position of a coating rod, adjusting the thickness of the coating to be 1mm, starting a coating machine after the setting is finished, and uniformly coating the coating liquid on the surface of the metal plate under the action of the coating rod. And after the coating is finished, placing the material in a blast drying oven preheated to 70 ℃ for drying, stopping drying after 15min, demolding the film material, and taking down the film material for later use. (3) Preparing a fiber-based multilayer noise-reducing flexible material: and (3) sequentially compounding the polyurethane foam film prepared in the step (1), the prepared fiber felt and the prepared woven fabric and the polyurethane/carbon fiber powder composite film prepared in the step (2), and thus, finishing the preparation of the fiber-based multilayer noise reduction flexible material.
3. The preparation method of the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the coating of the foaming film comprises the following components in parts by weight: aqueous polyurethane: 100 parts by weight; foaming agent: 4 parts by weight; foam stabilizer: 1 part by weight; thickening agent: 2.5 parts by weight.
4. The method for preparing the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the foaming rate of the coating of the foamed film is 100-350%.
5. The preparation method of the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the polyurethane/carbon fiber powder composite film coating comprises the following components in parts by weight: aqueous polyurethane: 100 parts by weight; carbon fiber powder: 10-70 parts by weight; defoaming agent: 1 part by weight; dispersing agent: 1 part by weight; leveling agent: 1 part by weight; thickening agent: 0 to 5 weight portions.
6. The preparation method of the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the aqueous polyurethane is PU-2540, a translucent emulsion, solid powder 40 ± 1, and viscosity (25 ℃, mPa.S) is less than 300.
7. The method for preparing the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the thickener is an aqueous thickener, the main component of the thickener is a polyurethane compound, the pH value is 7.0 +/-0.1, and the viscosity is less than or equal to 3000CPS/25 ℃.
8. The method for preparing a fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the foaming agent is sodium dodecyl sulfate, the dispersing agent is HTK-5040, the leveling agent is RM-2020, and the defoaming agent is AFE-1410.
9. The method for preparing a fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the foam stabilizer is an alcohol ether modified polyhydroxy polymer, the active content is 55 ± 2%, and the PH value is 6.5-8.5.
10. The method for preparing the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 2, wherein the carbon fiber powder has a particle size of 400 meshes.
11. The method for preparing a fiber-based multilayer noise-reducing flexible composite material as claimed in claim 1, wherein the fiber felt is one of non-woven fabrics made of any fiber.
12. The method for preparing the fiber-based multilayer noise-reducing flexible composite material as claimed in claim 1, wherein the woven fabric is any woven fabric of fiber products meeting certain strength requirements.
CN202111514782.7A 2021-12-13 2021-12-13 Preparation method of fiber-based multilayer noise-reducing flexible composite material Pending CN114179450A (en)

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CN205651741U (en) * 2016-03-01 2016-10-19 上汽通用汽车有限公司 Make an uproar syllable -dividing multilayer combined material and pad that gives sound insulation fall in lightweight
CN113043703A (en) * 2021-04-08 2021-06-29 天津工业大学 Preparation method of polyurethane/ferroferric oxide/fibrofelt flexible noise reduction composite material
CN113106760A (en) * 2021-04-08 2021-07-13 天津工业大学 Preparation method of polyurethane/activated carbon fiber felt flexible noise reduction material

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* Cited by examiner, † Cited by third party
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US20100081354A1 (en) * 2008-10-01 2010-04-01 Polymer Group, Inc. Nonwoven Multilayered Fibrous Batts And Multi-Density Molded Articles Made With Same And Processes Of Making Thereof
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CN205651741U (en) * 2016-03-01 2016-10-19 上汽通用汽车有限公司 Make an uproar syllable -dividing multilayer combined material and pad that gives sound insulation fall in lightweight
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