CN115476562B - Flame-retardant chemical fiber sound absorption non-woven fabric and production method thereof - Google Patents

Flame-retardant chemical fiber sound absorption non-woven fabric and production method thereof Download PDF

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Publication number
CN115476562B
CN115476562B CN202211286047.XA CN202211286047A CN115476562B CN 115476562 B CN115476562 B CN 115476562B CN 202211286047 A CN202211286047 A CN 202211286047A CN 115476562 B CN115476562 B CN 115476562B
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flame
sound
resin
retardant chemical
fiber
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CN115476562A (en
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谈丰源
吴晔
谈正杰
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Wuxi Hongqing Nonwoven Co ltd
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Wuxi Hongqing Nonwoven Co ltd
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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
    • B32B5/022—Non-woven fabric
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/10—Next to a fibrous or filamentary layer
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B5/08—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 the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different 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
    • 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
    • B32B5/26—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 another layer next to it also being fibrous or filamentary
    • B32B5/265—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 another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer
    • B32B5/266—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 another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer next to one or more non-woven fabric layers
    • 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
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/067—Wood 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B32B2262/144—Non-woven fabric
    • 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
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B32B2262/156—Net structure
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/06—Vegetal particles
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • 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
    • B32B2307/102—Insulating
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nonwoven Fabrics (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention relates to the technical field of composite non-woven fabrics, in particular to a flame-retardant chemical fiber sound-absorbing non-woven fabric and a production method thereof, wherein flame-retardant fibers are introduced into the upper surface and the lower surface of a mixed fiber layer, so that the overall flame retardance of the composite non-woven fabric is greatly improved, the high temperature resistance is improved, meanwhile, a resin layer is introduced between the flame-retardant fiber layer and the mixed fiber layer, the specific surface area is increased, sound-absorbing particles are paved in the resin layer, the overall sound-absorbing performance of the composite non-woven fabric is enhanced, and the sound-insulating performance is improved; the sound absorption particles are prepared by molding and calcining phosphogypsum, so that the preparation cost is reduced, and the noise reduction effect is improved.

Description

Flame-retardant chemical fiber sound absorption non-woven fabric and production method thereof
Technical Field
The invention relates to the technical field of composite non-woven fabrics, in particular to a flame-retardant chemical fiber sound absorption non-woven fabric and a production method thereof.
Background
The non-woven fabric is also called as non-woven fabric, is formed by oriented or random fibers, belongs to a new generation of environment-friendly materials, has the advantages of moisture resistance, ventilation, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity, no irritation, low cost, recycling, and the like, and is in a fiber net structure. The preparation process is generally as follows: the raw materials are prepared by the processes of high-temperature melting, spinning, wire laying, hot pressing, crimping and the like.
At present, with the diversification of the performance requirements of the non-woven fabrics, the preparation of the composite type multifunctional non-woven fabrics is a focus of attention of the person skilled in the art, and a great deal of research is being conducted. For example: the patent number 201310044667.7 discloses a quick water-absorbing air-laid non-woven fabric and a processing method thereof, wherein the non-woven fabric is at least provided with two layers, a resin layer is laid between the non-woven fabric layers, the non-woven fabric layer is prepared by mixing low-melting-point chemical fibers, wood fibers and wood pulp, specifically, the low-melting-point chemical fibers, the wood pulp fibers and the wood pulp are mixed and evenly spread on a net-conveying curtain through an air-laid machine to form a fiber net, the fiber net is spread on the fiber net through a powder spreader, resin powder is spread on the fiber net, and then the fiber net is processed by far infrared rays, heated and shaped, and then is processed by rolling, pressing, ironing and ultrasonic longitudinal heat sealing, so that the surface ratio of the resin powder is improved, and the water-absorbing speed is accelerated; no powder leakage occurs after cutting, and no water leakage occurs on the side after water absorption.
For another example: patent No. 201510809313.1 discloses a high-temperature-resistant polyester nonwoven fabric for automobile weight reduction and a preparation method thereof, wherein the polyester nonwoven fabric comprises a polyester fiber sheet layer and an aluminum foil layer, and density is reduced along the thickness direction of the polyester fiber sheet layer to form: the aluminum foil layer is compounded on the surface of the compact layer. The obtained non-woven fabric has the advantages of light weight, good elasticity, flame retardance, high-temperature resistance, heat insulation, sound absorption and sound insulation.
For another example: the patent number 201721773007.2 discloses a flame-retardant chemical fiber sound absorption non-woven fabric, which sequentially comprises a flame-retardant chemical fiber layer, a reinforcing layer and a sound absorption non-woven fabric layer from top to bottom, wherein the reinforcing layer comprises a rubber matrix, tensile fiber wires which are horizontally and longitudinally arranged are arranged in the rubber matrix, the thickness of the flame-retardant chemical fiber layer is 0.4-0.8mm, and the flame-retardant chemical fiber layer and flame retardant particles are utilized, so that the sound absorption, fireproof and flame-retardant performances are improved, and meanwhile, the tensile capacity is enhanced.
However, the performance of various flame-retardant chemical fiber sound-absorbing nonwoven materials in the prior art still cannot meet the practical application requirements, for example: the balance of fire-retardant performance and sound absorption and insulation effects.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a flame-retardant chemical fiber sound absorption non-woven fabric and a production method thereof.
The method is realized by the following technical scheme:
the invention provides a flame-retardant chemical fiber sound-absorbing non-woven fabric, which comprises a mixed fiber layer, wherein flame-retardant chemical fiber layers are arranged on the upper surface of the mixed fiber layer and the lower surface of the mixed fiber layer, a resin layer is laid between the flame-retardant chemical fiber layer and the mixed fiber layer, a plurality of sound-absorbing particles are arranged in the resin layer, and the particle size of the sound-absorbing particles is 0.1-0.5mm; the sound absorption particles are prepared by mixing phosphogypsum and fresh straw according to the mass ratio of 1:0.01-0.03, ball milling, sieving with 4000 mesh sieve, granulating, and then sending into a calciner in nitrogen protection atmosphere, and treating for 1h at 600-800 ℃.
The flame retardant fibers are introduced into the upper surface and the lower surface of the mixed fiber layer, so that the overall flame retardant property and the high temperature resistance of the composite non-woven fabric are greatly improved, meanwhile, the specific surface area is increased by introducing the resin layer between the flame retardant fiber layer and the mixed fiber layer, and the sound absorption particles are paved in the resin layer, so that the overall sound absorption property of the composite non-woven fabric is enhanced, and the sound insulation property is improved; the sound absorption particles are prepared by molding and calcining phosphogypsum, so that the preparation cost is reduced, and the noise reduction effect is improved.
In order to be able to increase the sound absorption effect of the sound-absorbing particles, it is preferred that the sound-absorbing particles have a plurality of micro-holes. More preferably, the pore diameter of the micropores is 0.0001 to 0.003mm.
In order to ensure the strength and the sound absorption effect of the sound absorption particles, preferably, the sound absorption particles are prepared by mixing phosphogypsum and fresh straw according to the mass ratio of 1:0.02, ball milling, sieving with 4000 mesh sieve, granulating, and then sending into a calciner in nitrogen protection atmosphere, and treating for 1h at 700 ℃.
In order to ensure that sufficient sugar degree can be provided for the granulating process, and the viscosity is further improved, so that the granulating and molding effect is better, preferably, the fresh straw is corn straw and/or sugarcane straw.
Preferably, the mixed fiber layer has a surface density of 20-25 g/square meter and a thickness of 0.3mm.
Preferably, the thickness of the resin layer is 0.6 to 0.8mm.
Preferably, the thickness of the flame-retardant chemical fiber layer is 0.1-0.2mm.
The second object of the invention is to provide a method for producing the flame-retardant chemical fiber sound-absorbing non-woven fabric, which comprises the following steps:
s1: mixing phosphogypsum and fresh straw according to the mass ratio of 1:0.01-0.03, ball milling, sieving with 4000 mesh sieve, granulating, feeding into a calciner in nitrogen protection atmosphere, and treating at 600-800 ℃ for 1h to prepare sound absorption particles;
s2: mixing BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.3-0.5:1, and uniformly spreading on a net conveying curtain through an air-laid machine to form a fiber net;
s3: heating and melting resin to prepare resin slurry, and simultaneously preparing resin powder with fineness of 80 meshes from the resin;
s4: sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles, spreading flame-retardant chemical fibers, and rolling under 0.1-0.2MPa by adopting a hot roll at 80 ℃ to obtain primary cloth;
s5: turning over the primary cloth, spreading resin powder and resin slurry in turn, paving sound absorbing particles, spreading flame-retardant chemical fiber, heating for shaping, and rolling at 80 deg.C under 0.6-0.8 MPa.
In order to ensure that the primary cloth rolling forming effect is better and the overall performance is excellent, preferably, the mass ratio of the resin powder to the resin slurry is 1:0.2-0.5.
Compared with the prior art, the invention has the technical effects that:
the invention has simple structure, easy control of manufacturing process flow, easy obtainment of adopted raw materials, low manufacturing cost, better high temperature resistance of the obtained flame-retardant chemical fiber sound absorption non-woven fabric, better sound insulation and noise reduction effect, fully utilizes mutual cooperation of the resin layer and the sound absorption particles, ensures better adhesion and molding of the mixed fiber layer and the flame-retardant chemical fiber layer, improves the peeling resistance strength, and simultaneously enhances the effects of sound insulation, noise reduction and flame retardance.
The invention adopts the resin slurry formed by melting and the resin powder formed by grinding for compounding, realizes the process simplification of the primary cloth forming stage, ensures that the integral heating forming can be realized after the turn-over preparation, and improves the connection strength among the resin layer, the flame-retardant chemical fiber layer and the mixed fiber layer by high-pressure rolling.
The invention utilizes the mixing and grinding of the fresh straw and the phosphogypsum to pass through the 4000-mesh sieve, not only improves the contact area between the phosphogypsum and the fresh straw and improves the mixing uniformity, but also fully ensures that the phosphogypsum and the fresh straw can be granulated into uniform fine particles, simultaneously realizes that a plurality of micropores are formed on the fine particles during calcination, ensures the bonding strength of phosphogypsum powder, improves the strength of sound-absorbing particles, avoids the phenomenon that the sound-absorbing particles are crushed in a large amount during rolling, and enhances the noise reduction effect of the sound-absorbing particles paved in a resin layer.
The invention has simple process flow and low manufacturing cost, and is easier for industrialized popularization and implementation.
Drawings
FIG. 1 is a flow chart of the process of the invention.
FIG. 2 is a schematic cross-sectional structure of the flame retardant chemical fiber sound absorbing nonwoven fabric created by the invention.
Fig. 3 is an enlarged schematic view of the sound absorbing particles of the present invention.
1-a mixed fiber layer 2-a resin layer 3-a flame-retardant chemical fiber layer 4-sound absorption particles 5-micropores.
Detailed Description
The technical solution of the present invention is further defined below with reference to the accompanying drawings and specific embodiments, but the scope of the claims is not limited to the description.
As shown in fig. 1 and 2, in some embodiments, the flame-retardant chemical fiber sound-absorbing nonwoven fabric comprises a mixed fiber layer 1, flame-retardant chemical fiber layers 3 are arranged on the upper surface of the mixed fiber layer 1 and the lower surface of the mixed fiber layer 1, a resin layer 2 is laid between the flame-retardant chemical fiber layers 3 and the mixed fiber layer 1, a plurality of sound-absorbing particles 4 are arranged in the resin layer 2, and the particle size of the sound-absorbing particles 4 is 0.1-0.5mm, for example: 0.1mm,0.2mm,0.3mm,0.4mm,0.5mm, etc.; the sound absorption particles 4 are prepared from phosphogypsum and fresh straw according to the mass ratio of 1:0.01-0.03, for example: mixing and ball milling at the ratio of 1:0.01,1:0.02 and 1:0.03, sieving with 4000 mesh sieve, granulating, and feeding into a calciner in nitrogen protection atmosphere at 600-800 ℃, for example: treating at 600 deg.c, 700 deg.c, 800 deg.c, etc for 1 hr.
Phosphogypsum and fresh straw are mixed, ground, granulated and calcined to prepare sound absorption particles, the sound absorption particles are arranged in a resin layer, the sound absorption particles are arranged between a flame-retardant chemical fiber layer and a mixed fiber layer by molding and curing of the resin layer, and the bonding strength between the flame-retardant chemical fiber layer and the mixed fiber layer is enhanced by a specific molding process, so that the stripping resistance is improved, meanwhile, the flame-retardant high-temperature-resistant sound absorption and noise reduction effect is enhanced, the balanced promotion of the flame-retardant and noise reduction effect is realized, and the integral performance of the flame-retardant chemical fiber sound absorption non-woven fabric is improved.
As shown in fig. 2 and 3, in some embodiments, the sound absorbing particles 4 have a plurality of micro-holes 5. The pore diameter of the micropores 5 is 0.0001-0.003mm, for example: 0.000mm, 0.001mm,0.003mm, etc. The aperture is only an average value obtained by testing the sound-absorbing particles created by the invention, and the aperture is below 0.01mm, so that the strength of the sound-absorbing particles can be effectively ensured, and the porosity is better.
In certain embodiments, the fresh straw is corn straw and/or sugar cane straw, for example: corn stalk, sugarcane stalk or mixed stalk formed by mixing corn stalk and sugarcane stalk according to the mass ratio. Besides the two types of straws, other straws with relatively high sugar content can be selected for replacement, so that the viscosity of phosphogypsum and fresh straws after mixing and grinding is guaranteed, the uniformity of particle forming is guaranteed, the strength and pore diameter after granulating-calcining forming are guaranteed, the pore diameter formed is kept below 0.01mm (in a more excellent embodiment, the average pore diameter of pores in sound-absorbing particles is measured to be 0.003 mm), the sound absorption and noise reduction effects are guaranteed to a great extent, and the sound insulation effect is improved.
In certain embodiments, as shown in FIG. 1, the mixed fiber layer 1 has a surface density of 20-25 g/square meter and a thickness of 0.3mm; for example: the mixed fiber layer is prepared from BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.3-0.5:1, for example: 1:0.3:1,1:0.4:1,1:0.5:1, etc.
As shown in fig. 1, in some embodiments, the resin layer 2 has a thickness of 0.6-0.8mm, for example: 0.6mm,0.7mm,0.8mm; the resin is selected from but not limited to polypropylene resin, polyethylene resin or a mixture of polypropylene resin and polyethylene resin in a mass ratio.
As shown in fig. 1, in some embodiments, the flame retardant chemical fiber layer 3 has a thickness of 0.1 to 0.2mm, for example: 0.1mm,0.2mm, etc.; the flame-retardant chemical fiber layer is prepared from low-smoke halogen-free flame-retardant polyolefin.
As shown in fig. 1, in some embodiments, the method for producing the flame retardant chemical fiber sound absorption nonwoven fabric includes the following steps:
s1: phosphogypsum and fresh straw are taken according to the mass ratio of 1:0.01-0.03, for example: mixing and ball milling at the ratio of 1:0.01,1:0.02 and 1:0.03, sieving with 4000 mesh sieve, granulating, and feeding into a calciner in nitrogen protection atmosphere at 600-800 ℃, for example: processing for 1h at the isothermal temperature of 600 ℃,700 ℃ and 800 ℃ to prepare sound absorption particles;
s2: BET polyester fiber, aramid fiber and wood pulp are mixed according to the mass ratio of 1:0.3-0.5:1, for example: mixing at equal proportions of 1:0.3:1,1:0.4:1 and 1:0.5:1, and uniformly spreading on a net conveying curtain by an air-laying device to form a fiber net;
s3: heating and melting resin to prepare resin slurry, and simultaneously preparing resin powder with fineness of 80 meshes from the resin;
s4: sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles, spreading flame-retardant chemical fibers, and rolling under 0.1-0.2MPa by adopting a hot roll at 80 ℃ to obtain primary cloth;
s5: turning over the primary cloth, spreading resin powder and resin slurry in turn, spreading sound absorbing particles, spreading flame-retardant chemical fiber, heating at 130deg.C for shaping, and rolling at 80 deg.C under 0.6-0.8 MPa. The mass ratio of the resin powder to the resin slurry is 1:0.2-0.5.
The fiber net prepared from BET polyester fibers, aramid fibers and wood pulp is sequentially sprinkled with resin powder and resin pulp, then is paved with sound absorption particles, is paved with flame-retardant chemical fibers, is rolled to prepare primary cloth, is turned over, is sequentially sprinkled with resin powder and resin pulp, is paved with sound absorption particles, is paved with flame-retardant chemical fibers, is heat-set, is hot-rolled to be pressed, and is improved in hot-rolling pressure, so that the integral forming effect is better, the stripping resistance between a flame-retardant chemical fiber layer and a composite fiber layer is enhanced, and meanwhile, the sound insulation and noise reduction effects are improved.
In order to better illustrate the technical effects of the invention, the present inventors have made the following more detailed description of the experiments performed during the preparation process, so as to facilitate the accurate understanding of the invention by those skilled in the art.
Test one, study on preparation of Sound absorbing particles
Example 1
Mixing phosphogypsum and fresh corn straw according to the mass ratio of 1:0.01, ball milling, sieving with 4000 mesh sieve, granulating (particle size of 0.5 mm), sending into a calciner in nitrogen protection atmosphere, and treating at 600 ℃ for 1h to prepare the sound-absorbing particles.
Example 2
Mixing phosphogypsum and fresh corn straw according to the mass ratio of 1:0.03, ball milling, sieving with 4000 mesh sieve, granulating (particle size of 0.5 mm), sending into a calciner in nitrogen protection atmosphere, and treating at 800 ℃ for 1h to prepare the sound-absorbing particles.
Example 3
Mixing phosphogypsum and fresh sugarcane straws according to the mass ratio of 1:0.02, ball milling, sieving with 4000 mesh sieve, granulating (particle size of 0.5 mm), sending into a calciner in nitrogen protection atmosphere, and treating at 700 ℃ for 1h to prepare sound absorption particles.
Example 4
Mixing phosphogypsum and fresh corn straw according to the mass ratio of 1:0.04, ball milling, sieving with 4000 mesh sieve, granulating (particle size of 0.5 mm), sending into a calciner in nitrogen protection atmosphere, and treating at 800 ℃ for 1h to prepare the sound absorption particles.
Example 5
Mixing phosphogypsum and fresh corn straw according to the mass ratio of 1:0.005, ball milling, sieving with 4000 mesh sieve, granulating (particle size of 0.5 mm), sending into a calciner in nitrogen protection atmosphere, and treating at 600 ℃ for 1h to prepare the sound-absorbing particles.
Example 6
On the basis of example 2, the sound-absorbing particles were prepared by directly grinding, granulating and calcining phosphogypsum, in the same manner as in example 2.
The sound-absorbing particles prepared in example 1-example 5 were used for measuring the porosity thereof and the average pore diameter of pores, while taking 0.5kg of sound-absorbing particles, and after being placed thereon for 2 hours by a pressure hammer of 5kg weight, were sieved with a 1000-mesh sieve, and the sieving rate was measured, and the results thereof are shown in table 1 below.
Table 1 sound absorbing particle performance test
Example 1 Example 2 Example 3 Example 4 Example 5 Example 6
Porosity (%) 37.5 41.2 40.7 46.3 30.4 27.9
Average pore diameter (mm) 0.0015 0.0030 0.0031 0.0021 0.0017 0.06
Sieving Rate (%) 24.3 21.8 19.7 42.5 39.6 46.5
As can be seen from Table 1, the reasonable proportion of phosphogypsum to fresh straw is adopted, and after ball milling, sieving, granulating and calcining, the strength of the sound absorbing particles is improved, a large amount of fragments generated by extrusion are avoided, and the porosity of the sound absorbing particles is improved.
Study on technology of flame-retardant chemical fiber sound-absorbing non-woven fabric
Example 7
Heating and melting polypropylene resin to prepare resin slurry, and simultaneously preparing resin powder with fineness of 80 meshes from the polypropylene resin; mixing BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.3:1, and uniformly spreading on a net conveying curtain through an air-laid machine to form a fiber net, wherein the density of the fiber net is between 20 and 25 g/square meter, and the thickness is 0.3mm; sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles, spreading flame-retardant chemical fibers, and rolling under 0.1MPa by adopting a hot roller at 80 ℃ to obtain primary cloth; turning over the primary cloth, spreading resin powder and resin slurry in turn, paving sound absorbing particles, spreading flame-retardant chemical fiber, heating at 130 ℃ for shaping, and rolling at 80 ℃ under 0.8MPa to obtain the final product. The mass ratio of the resin powder to the resin slurry is 1:0.2. The thickness of the resin layer was 0.6mm. The thickness of the flame-retardant chemical fiber layer is 0.1mm. The sound absorbing particles were prepared as in example 2.
Example 8
Heating and melting polyethylene resin to prepare resin slurry, and simultaneously preparing resin powder with fineness of 80 meshes from the polyethylene resin; mixing BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.5:1, and uniformly spreading on a net conveying curtain through an air-laid machine to form a fiber net, wherein the density of the fiber net is between 20 and 25 g/square meter, and the thickness is 0.3mm; sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles, spreading flame-retardant chemical fibers, and rolling under 0.2MPa by adopting a hot roller at 80 ℃ to obtain primary cloth; turning over the primary cloth, spreading resin powder and resin slurry in turn, paving sound absorbing particles, spreading flame-retardant chemical fiber, heating at 130 ℃ for shaping, and rolling at 80 ℃ under 0.6MPa to obtain the final product. The mass ratio of the resin powder to the resin slurry is 1:0.5. The thickness of the resin layer was 0.8mm. The thickness of the flame-retardant chemical fiber layer is 0.2mm. The sound absorbing particles were prepared as in example 2.
Example 9
Heating and melting polypropylene resin to prepare resin slurry, and simultaneously preparing polyethylene resin into resin powder with fineness of 80 meshes; mixing BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.4:1, and uniformly spreading on a net conveying curtain through an air-laid machine to form a fiber net, wherein the density of the fiber net is between 20 and 25 g/square meter, and the thickness is 0.3mm; sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles, spreading flame-retardant chemical fibers, and rolling under 0.1MPa by adopting a hot roller at 80 ℃ to obtain primary cloth; turning over the primary cloth, spreading resin powder and resin slurry in turn, paving sound absorbing particles, spreading flame-retardant chemical fiber, heating at 130 ℃ for shaping, and rolling at 80 ℃ under 0.7MPa to obtain the final product. The mass ratio of the resin powder to the resin slurry is 1:0.4. The thickness of the resin layer was 0.7mm. The thickness of the flame-retardant chemical fiber layer is 0.1mm. The sound absorbing particles were prepared as in example 2.
Example 10
Heating and melting polyethylene resin to prepare resin slurry, and simultaneously preparing polypropylene resin into resin powder with fineness of 80 meshes; mixing BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.5:1, and uniformly spreading on a net conveying curtain through an air-laid machine to form a fiber net, wherein the density of the fiber net is between 20 and 25 g/square meter, and the thickness is 0.3mm; sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles, spreading flame-retardant chemical fibers, and rolling under 0.2MPa by adopting a hot roller at 80 ℃ to obtain primary cloth; turning over the primary cloth, spreading resin powder and resin slurry in turn, paving sound absorbing particles, spreading flame-retardant chemical fiber, heating at 130 ℃ for shaping, and rolling at 80 ℃ under 0.7MPa to obtain the final product. The mass ratio of the resin powder to the resin slurry is 1:0.3. The thickness of the resin layer was 0.8mm. The thickness of the flame-retardant chemical fiber layer is 0.2mm. The sound absorbing particles were prepared as in example 2.
Example 11
On the basis of example 7, the aramid fiber is replaced by BET polyester fiber, and the other steps are the same as those of example 7.
Example 12
On the basis of example 7, the BET polyester fiber was replaced with an aramid fiber, and the other steps were the same as in example 7.
Example 13
On the basis of example 7, the resin syrup was replaced with resin powder, and the other steps were the same as in example 7.
Example 14
On the basis of example 7, the resin powder was replaced with a resin syrup, and the other steps were the same as in example 7.
Example 15
On the basis of the embodiment 7, the rolling pressure after the turn-over is equal to the rolling pressure before the turn-over, and the other steps are the same as the embodiment 7.
Example 16
The rolling pressure before the turn-over and the rolling pressure after the turn-over are exchanged with each other on the basis of example 7, and the other is the same as example 7.
Example 17
On the basis of example 7, no sound-absorbing particles were laid, the same as in example 7.
The flame retardant chemical fiber sound absorption nonwoven fabrics obtained in examples 7 to 17 were subjected to a layer-to-layer peeling test, and the force at which the flame retardant chemical fiber layer and the mixed fiber layer could be peeled off from each other was tested, and the peeling force measuring method was: after the flame-retardant chemical fiber layer on the upper surface of the flame-retardant chemical fiber sound-absorbing non-woven fabric is fixed by ropes, the number of fixed points is 10, the distance between every two points is 1cm, the ropes are hung on a ceiling, meanwhile, the flame-retardant chemical fiber layer on the lower surface of the flame-retardant chemical fiber sound-absorbing non-woven fabric is fixed by ropes, the fixed points are opposite to the fixed points on the upper surface, the weight of the fixed points is increased on the ropes on the lower surface (0.5 kg/time, the time interval is 15s for each time), until the flame-retardant chemical fiber layer and the mixed fiber layer are stripped or the weight of the flame-retardant chemical fiber layer reaches 30kg, and the test results are shown in table 2.
Meanwhile, the flame retardant chemical fiber sound absorption nonwoven fabrics obtained in examples 7 to 17 were subjected to a sound insulation effect test, were made into a sealed packet shape by using the flame retardant chemical fiber sound absorption nonwoven fabrics, and were placed inside the packet with a player capable of generating a sound volume of 80dB, and the sound volume transferred from the packet was tested outside the packet, and then the noise reduction rate was calculated, and the results thereof are shown in table 2 below.
Table 2 performance test of flame retardant chemical fiber sound absorbing nonwoven fabrics
Stripping force (kg) Volume outside bag (dB) Noise reduction Rate (%)
Example 7 27.5 25 68.75
Example 8 27.0 28 65.00
Example 9 28.0 29 63.75
Example 10 26.5 26 67.50
Example 11 19.5 27 66.25
Example 12 23.0 30 62.50
Example 13 14.5 26 67.50
Example 14 18.5 24 70.00
Example 15 10.0 25 68.75
Example 16 11.5 29 63.75
Example 17 28.5 60 25.00
As can be seen from table 2, the addition or non-addition of the sound-absorbing particles directly affects the sound-insulating effect and the noise-reducing effect, resulting in poor sound-insulating and noise-reducing effects; meanwhile, proper treatment of the preparation process can help to improve the bonding strength between the flame-retardant chemical fiber layer and the mixed fiber layer, enhance the peeling strength between the layers and improve the comprehensive performance of the flame-retardant chemical fiber sound absorption non-woven fabric.
Experiment III, research on influence of addition of different sound absorption particles on flame-retardant chemical fiber sound absorption non-woven fabric
Example 18
According to the preparation process of example 9, the sound-absorbing particles prepared in example 1 were used to prepare flame-retardant chemical fiber sound-absorbing nonwoven fabrics.
Example 19
According to the preparation process of example 9, the sound-absorbing particles prepared in example 3 were used to prepare flame-retardant chemical fiber sound-absorbing nonwoven fabrics.
Example 20
According to the preparation process of example 9, the sound-absorbing particles prepared in example 4 were used to prepare flame-retardant chemical fiber sound-absorbing nonwoven fabrics.
Example 21
According to the preparation process of example 9, the sound-absorbing particles prepared in example 5 were used to prepare flame-retardant chemical fiber sound-absorbing nonwoven fabrics.
Example 22
According to the preparation process of example 9, the sound-absorbing particles prepared in example 6 were used to prepare flame-retardant chemical fiber sound-absorbing nonwoven fabrics.
The flame retardant chemical fiber sound absorbing nonwoven fabrics obtained in examples 18 to 22 were tested according to the peel strength and the noise reduction ratio of test two, and the results are shown in table 3 below.
TABLE 3 influence of different sound absorbing particles on the performance of flame retardant chemical fiber sound absorbing nonwoven fabrics
Stripping force (kg) Volume outside bag (dB) Noise reduction Rate (%)
Example 18 26.5 29 63.75
Example 19 ND 21 73.75
Example 20 27.0 38 52.50
Example 21 24.5 42 47.50
Example 22 25.0 59 26.25
Remarks: ND means that the weight of the catalyst has been added to 30kg, and no peeling phenomenon is observed.
As can be seen from tables 1 and 3, with the change of the preparation process of the sound-absorbing particles and the addition of fresh straw, the compressive strength, the porosity, the average pore diameter and the like of the sound-absorbing particles are changed, so that the performance of the sound-absorbing particles is changed, and the comprehensive performance of the flame-retardant chemical fiber sound-absorbing non-woven fabric is affected after the sound-absorbing particles are added in the preparation process of the flame-retardant chemical fiber sound-absorbing non-woven fabric. The higher the compression strength of the sound-absorbing particles is, the larger amount of crushing phenomenon can be avoided when the sound-absorbing particles are rolled, the forming rate of the sound-absorbing particles is improved, and then the interlayer stripping resistance and the noise reduction efficiency of the flame-retardant chemical fiber sound-absorbing non-woven fabric are improved.
The invention is realized by conventional technical means with reference to the prior art or common general knowledge known to the person skilled in the art.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (3)

1. The flame-retardant chemical fiber sound-absorbing non-woven fabric is characterized by comprising a mixed fiber layer (1), flame-retardant chemical fiber layers (3) are arranged on the upper surface of the mixed fiber layer (1) and the lower surface of the mixed fiber layer (1), a resin layer (2) is laid between the flame-retardant chemical fiber layers (3) and the mixed fiber layer (1), a plurality of sound-absorbing particles (4) are arranged in the resin layer (2), and the particle size of the sound-absorbing particles (4) is 0.1-0.5mm; the sound absorption particles (4) are prepared by mixing phosphogypsum and fresh straw according to the mass ratio of 1:0.01-0.03, ball milling, sieving with 4000 mesh sieve, granulating, and then sending into a calciner in nitrogen protection atmosphere, and treating for 1h at 600-800 ℃;
the sound absorption particles (4) are provided with a plurality of micropores (5);
the aperture of the micropore (5) is 0.0001-0.003mm;
the fresh straw is corn straw and/or sugarcane straw;
the surface density of the mixed fiber layer (1) is 20-25 g/square meter, and the thickness is 0.3mm;
the mixed fiber layer is prepared by mixing BET polyester fibers, aramid fibers and wood pulp according to the mass ratio of 1:0.3-0.5:1;
the thickness of the resin layer (2) is 0.6-0.8mm;
the thickness of the flame-retardant chemical fiber layer (3) is 0.1-0.2mm;
the production method of the flame-retardant chemical fiber sound absorption non-woven fabric comprises the following steps:
s1: mixing phosphogypsum and fresh straw according to the mass ratio of 1:0.01-0.03, ball milling, sieving with 4000 mesh sieve, granulating, feeding into a calciner in nitrogen protection atmosphere, and treating at 600-800 ℃ for 1h to prepare sound absorption particles (4);
s2: mixing BET polyester fiber, aramid fiber and wood pulp according to the mass ratio of 1:0.3-0.5:1, and uniformly spreading on a net conveying curtain through an air-laid machine to form a fiber net;
s3: heating and melting resin to prepare resin slurry, and simultaneously preparing resin powder with fineness of 80 meshes from the resin;
s4: sequentially spreading resin powder and resin slurry on a fiber web, paving sound absorption particles (4), spreading flame-retardant chemical fibers, and rolling at 80 ℃ under 0.1-0.2MPa to obtain primary cloth;
s5: turning over the primary cloth, spreading resin powder and resin slurry in turn, paving sound absorbing particles (4), spreading flame-retardant chemical fiber, heating for shaping, and rolling at 80 deg.C under 0.6-0.8 MPa.
2. The flame-retardant chemical fiber sound-absorbing non-woven fabric according to claim 1, wherein the mass ratio of the resin powder to the resin paste is 1:0.2-0.5.
3. The flame-retardant chemical fiber sound-absorbing non-woven fabric according to claim 1, wherein the sound-absorbing particles (4) are prepared by mixing phosphogypsum and fresh straw according to a mass ratio of 1:0.02, ball milling, sieving with 4000 mesh sieve, granulating, and then feeding into a calciner in a nitrogen protection atmosphere, and treating for 1h at 700 ℃.
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