CN115710758A - Polyester flame-retardant sound-absorbing cotton and preparation method thereof - Google Patents
Polyester flame-retardant sound-absorbing cotton and preparation method thereof Download PDFInfo
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- CN115710758A CN115710758A CN202211318308.1A CN202211318308A CN115710758A CN 115710758 A CN115710758 A CN 115710758A CN 202211318308 A CN202211318308 A CN 202211318308A CN 115710758 A CN115710758 A CN 115710758A
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Abstract
The application relates to the technical field of sound-absorbing cotton, and particularly discloses polyester flame-retardant sound-absorbing cotton and a preparation method thereof. The polyester flame-retardant sound-absorbing cotton comprises 20-40 mass ratio of plant fiber to 80 mass ratio of polyester fiber, wherein the polyester fiber comprises flame retardant doped polyester fiber, the flame retardant comprises organic phosphorus flame retardant or germanium dioxide, the polyester fiber is sheath-core type low-melting-point polyester composite fiber, and the plant fiber is plant fiber finished by a reaction type flame retardant. The preparation method comprises the following steps: and (2) taking polyester fibers and plant fibers, stirring and mixing, drying, opening and carding, cutting and paving, carrying out hot pressing at 190-200 ℃, and cooling to obtain the sound-absorbing cotton. The sound-absorbing cotton can be used for automobiles, large-scale instruments and the like, and has excellent flame retardance and sound-absorbing effect; in addition, the preparation method has the advantages of simple process and simplicity and convenience in operation.
Description
Technical Field
The application relates to the technical field of sound-absorbing cotton, in particular to polyester flame-retardant sound-absorbing cotton and a preparation method thereof.
Background
The polyester fiber sound-absorbing cotton is also called glass cotton, is a material which is prepared by taking polyester fiber as a raw material and performing hot press molding and has the sound-absorbing function, and has a good relieving effect on high-frequency high-decibel noise. The polyester fiber sound-absorbing cotton has a wide application range.
The polyester fiber sound-absorbing cotton is organic sound-absorbing cotton, and because the organic material has flammability, the polyester fiber sound-absorbing cotton has fire hazard. In order to improve the fire safety of the organic sound-absorbing material, a fire retardant is generally sprayed on the fibers and then the fibers are pressed into a board to obtain the sound-absorbing cotton with a fire-retardant effect.
To above-mentioned correlation technique, simply spray the fire retardant on the fibre, firstly, the bonding fastness between fire retardant and the fibre is not good, and secondly, the bonding fastness between the fibre that the parcel has the fire retardant is not good, consequently, leads to inhaling the sound cotton and exist the defect that sound absorption performance is not good and fire-retardant homogeneity is not good.
Disclosure of Invention
In order to improve the defect that sound absorbing cotton is poor in sound absorbing performance and poor in flame retardant uniformity, the application provides polyester flame retardant sound absorbing cotton and a preparation method thereof.
In a first aspect, the present application provides a polyester flame-retardant sound-absorbing cotton, which adopts the following technical scheme:
the polyester flame-retardant sound-absorbing cotton comprises 20-40 mass ratio of plant fiber to 80 mass ratio of polyester fiber, wherein the polyester fiber comprises flame retardant doped polyester fiber, the flame retardant comprises organic phosphorus flame retardant or germanium dioxide, the polyester fiber is sheath-core low-melting-point polyester composite fiber, and the plant fiber is plant fiber finished by a reaction type flame retardant.
Through adopting above-mentioned technical scheme, preferred adoption plant fiber cooperatees with polyurethane fiber among the application technical scheme, plant fiber has comparatively excellent antibiotic, the sound absorption, the shock attenuation, fall advantages such as making an uproar, consequently, with plant fiber and polyester fiber cooperation back, in the hot pressing in-process, low melting point cortex through polyester composite fiber bonds adjacent polyester fiber and plant fiber, form the composite construction who has more holes, increased the pore structure who inhales in the sound cotton, consequently, improved the sound effect of inhaling the sound cotton.
Secondly, in the technical scheme of the application, the polyester fiber is doped with the flame retardant, and the organophosphorus flame retardant is added into the polyester fiber, so that the phosphorus content in the organophosphorus flame retardant is high, the decomposition temperature is proper and is close to the decomposition temperature of the polyester fiber, and in the decomposition process, phosphorus promotes the polyester fiber to be decomposed into carbon, the generation of a carbon layer is promoted, the effect of an obvious nucleating agent is achieved, and the flame retardant effect of the sound-absorbing cotton is stably improved. In addition, the organic phosphorus flame retardant is added into the polyester fibers, and the polyester fibers and the plant fibers are bonded through the low-melting-point skin layers, so that the bonding firmness of the flame retardant and the polyester fibers is improved, and the bonding firmness of the polyester fibers is also improved, and the sound-absorbing cotton can uniformly absorb sound and has flame retardant effects.
Thirdly, germanium dioxide is preferably added into the polyester fiber in the technical scheme, the germanium dioxide improves the melting temperature of the polyester fiber, promotes the increase of the carbon layer of the polyester fiber, optimizes the compact flatness of the carbon layer, increases graphitization and improves the flame retardant effect of the polyester fiber.
Finally, the reaction type flame retardant is preferably adopted to modify the plant fibers in the technical scheme of the application, the reaction type flame retardant can be loaded in the pores of the plant fibers, the possibility of separation of the reaction type flame retardant and the plant fibers is reduced, and the reaction type flame retardant is further wrapped by the low-melting-point skin layer in the polyester fibers, so that the reaction type flame retardant is uniformly filled in the sound-absorbing cotton, and the flame retardant effect is stably achieved. Therefore, the sound-absorbing cotton obtains excellent flame retardance and sound-absorbing effect.
Preferably, the plant fiber is loaded with flame-retardant microcapsules, and the preparation of the flame-retardant microcapsules comprises the following steps: respectively taking ammonium polyphosphate, microcrystalline cellulose, cyanuric acid and melamine according to a mass ratio of 4-8; stirring and mixing the intermediate and cyanuric acid, and dispersing into absolute ethyl alcohol to obtain a mixed solution; and (2) dispersing melamine into absolute ethyl alcohol to obtain dispersion liquid, mixing the dispersion liquid with the mixed liquid, continuously reacting, centrifugally separating to retain solids, and drying to obtain the flame-retardant microcapsule.
Through adopting above-mentioned technical scheme, preferred adoption has loaded fire-retardant microcapsule on vegetable fibre among this application technical scheme, because have more hole on the vegetable fibre, can carry out the load to fire-retardant microcapsule to be difficult for hindering low melting cortex to vegetable fibre's bonding effect, keep inhaling the combination fastness between the cotton internal fiber of sound.
Preferably adopt ammonium polyphosphate among this application technical scheme, microcrystalline cellulose and melamine cyanurate cooperation preparation fire retardant microcapsule, ammonium polyphosphate and microcrystalline cellulose cooperation are as the core, and can form the shell after melamine and cyanuric acid normal position polymerization, the shell wraps up the core and forms the fire retardant microcapsule, flame retardant element P in the fire retardant microcapsule, C, the spatial distance of N is less, can effectively exert the synergism, can form complete and compact charcoal layer, separation oxygen and heat transfer, the protection unburnt base member, the stable flame retardant efficiency who inhales the sound cotton that improves.
Preferably, the plant fiber is subjected to a surface treatment, which comprises the steps of: soaking the plant fiber in alkali liquor, taking out and cleaning to obtain alkali-treated fiber; and (3) placing the alkali-treated fiber in a low-temperature plasma treatment instrument for plasma treatment to obtain the surface-treated fibrilia.
Through adopting above-mentioned technical scheme, preferred carry out surface treatment to vegetable fibre among this application technical scheme, vegetable fibre's surface ash is got rid of to alkali lye to get rid of the pectin in the part vegetable fibre, increase the pore depth in the vegetable fibre, improve the load effect of vegetable fibre to fire-retardant microcapsule, can improve the area of contact between fire-retardant fiber and the polyester fiber low melting point cortex moreover, effectively improve and inhale cotton fire resistance and associativity of sound. And then, carrying out plasma treatment on the plant fiber, and adding active groups such as-OH, -COOH and the like on the plant fiber, so as to further improve the bonding firmness between the plant fiber and the flame-retardant microcapsule and the bonding firmness between the plant fiber and the polyester fiber.
Preferably, the flame-retardant microcapsule is wrapped by a bonding shell, and the bonding shell is low-melting-point polyester.
Through adopting above-mentioned technical scheme, the preferred adoption among this application technical scheme is at the outer parcel low melting point polyester of fire-retardant microcapsule, and in the hot pressing process, the outer low melting point polyester of fire-retardant microcapsule melts with polyester fiber's low melting point cortex jointly, and the two has better compatibility, has consequently improved the bonding fastness between fire-retardant microcapsule and the polyester fiber. Moreover, even if the flame-retardant microcapsules are separated from the plant fibers, the flame-retardant microcapsules can be uniformly dispersed in the low-melting-point skin layer of the molten polyester fibers under the drive of the low-melting-point polyester, and the flame-retardant microcapsules can still be uniformly dispersed in the sound-absorbing cotton, so that the sound-absorbing cotton obtains a uniform flame-retardant effect.
Preferably, the bonding shell is further wrapped with bonding microspheres, the bonding microspheres comprise a bonding agent and a shell, the bonding agent comprises a silane coupling agent or polyacrylic acid, the bonding agent further comprises silicon dioxide, and the shell comprises gelatin.
By adopting the technical scheme, the bonding shell is also wrapped with the bonding microspheres, namely more flame retardant microcapsules are wrapped in the bonding shell, so that the plant fibers are grafted with the microspheres with larger sizes, and after the polyester fibers and the plant fibers are mixed, a pore structure for accommodating the bonding shell is formed between the polyester fibers and the plant fibers. When the hot pressing is carried out, the bonding shell, the polyester fiber low-melting-point shell and the bonding agent shell are all melted, the bonding agent outflows to wrap the flame retardant microcapsules, the bonding property between the flame retardant microcapsules and the low-melting-point polyester is improved, the flame retardant can be uniformly dispersed in the melted low-melting-point leather layer, and the dispersion uniformity and the bonding firmness of the flame retardant in the sound-absorbing cotton are further improved. Meanwhile, due to the melting of the bonding shell, the space occupied by the bonding shell originally is reserved, and partial pores can be reserved after hot pressing, so that the pore structure in the sound-absorbing cotton material is further improved, and the sound-absorbing effect of the sound-absorbing cotton is improved.
Preferably, the screen cloth further comprises any one or two of a polyester film and a polyester fiber screen cloth.
By adopting the technical scheme, the polyester film is preferably added in the sound-absorbing cotton in the technical scheme, and the polyester film is added, so that the polyester film can fix the polyester fibers, the plant fibers and the flame retardant microcapsules, and the structural compactness of the sound-absorbing cotton is enhanced; secondly, polyester film's joining, polyester film and the cavity constitution resonance sound absorption structure behind it, the film is forced to shake under the effect of sound wave, that is to say, inhales the sound cotton and carry out the sound absorption through fibre friction and polyester film resonance sound absorption jointly, has improved the sound absorption effect who inhales the sound cotton.
Secondly, the preferred adoption adds the polyester fiber screen cloth in inhaling the sound cotton among this application technical scheme, and the polyester fiber screen cloth still can carry out the tractive parcel to inhaling the cotton internal fiber of sound, has reduced the fibrous material and has warp or the possibility that drops to the mechanical properties of inhaling the sound cotton can further be improved in the addition of screen cloth structure.
Finally, adopt among this application technical scheme to introduce polyester film and polyester fiber screen cloth in inhaling the sound cotton simultaneously, the stable improvement inhales the combination fastness of polyester fiber, vegetable fibre and fire retardant microcapsule in the sound cotton, and, polyester fiber screen cloth can divide the polyester film surface into a plurality of tiny independent units, when the film takes place to vibrate, the deformation that independent unit film surface took place is restrainted to the screen cloth, restriction fibre friction vibration, the sound wave loss has stably been improved, the sound absorption effect who inhales the sound cotton has been improved promptly.
Preferably, the thickness of the polyester film is 0.05-0.2mm, and the mesh number of the polyester fiber screen is 20-40 meshes.
By adopting the technical scheme, the thickness of the polyester film, the mesh number of the polyester fiber screen and the appropriate film thickness are optimized in the technical scheme, the sound absorption performance can be improved, and the sound absorption effect on high-frequency sound waves and low-frequency sound waves is better; and the proper mesh number of the polyester fiber screen can effectively restrict the vibration and deformation of the film, reduce the possibility of sound wave reflection on the surface of the sound-absorbing cotton, and ensure that the sound-absorbing cotton obtains excellent sound-absorbing effect.
Preferably, the polyester fiber further comprises a hydrophilic flame-retardant polyester fiber.
Through adopting above-mentioned technical scheme, increased hydrophilic fire-retardant polyester fiber in inhaling the sound cotton, hydrophilic fire-retardant fibre, because hydrophilic fire-retardant polyester fiber's hydrophilic effect, consequently inhale the sound cotton can absorb the steam etc. in the air for there is suitable humidity in inhaling the sound cotton, less spark etc. are difficult for lighting and inhale the sound cotton, improve the condition of inhaling the cotton burning of sound. Secondly, when the sound-absorbing cotton is burnt, in the process of splashing water to the sound-absorbing cotton, the hydrophilic fiber can quickly absorb water and prevent the fire from further spreading, so that the use safety of the sound-absorbing cotton is improved.
In a second aspect, the application provides a preparation method of polyester flame-retardant sound-absorbing cotton, which adopts the following technical scheme:
a preparation method of polyester flame-retardant sound-absorbing cotton comprises the following preparation steps: taking polyester fibers and plant fibers, stirring and mixing, drying, opening and carding, cutting and paving, carrying out hot pressing at 190-200 ℃, and cooling to obtain the sound-absorbing cotton.
Through adopting above-mentioned technical scheme, having optimized the temperature of hot pressing among the this application technical scheme, suitable hot pressing temperature can make the low melting point cortex melting on the polyester fiber, through the firm polyester fiber and the vegetable fibre that bond of fused low melting point cortex, has improved and has inhaled the bonding fastness between each fibre in the sound cotton.
In summary, the present application has the following beneficial effects:
1. because this application adopts plant fiber and polyurethane fiber to cooperate, the cortex of low melting point through polyester composite fiber bonds adjacent polyester fiber and plant fiber, forms the composite construction that has more hole, has increased the pore structure who inhales in the sound cotton, has consequently improved the cotton effect of inhaling of sound.
By adding the organic phosphorus flame retardant or the germanium dioxide into the polyester fiber, the phosphorus element promotes the generation of the carbon layer to play a role of an obvious nucleating agent, and the germanium dioxide stably improves the melting temperature of the fiber and the flame retardant effect of the sound-absorbing cotton. And because the organic phosphorus flame retardant is positioned in the polyester fiber, the fibers are bonded through the low-melting-point skin layer of the polyester fiber, so that the bonding firmness of the fibers in the sound-absorbing cotton is improved.
Finally, the reaction type flame retardant is loaded on the plant fiber, so that the possibility of separation of the reaction type flame retardant and the plant fiber is reduced, and the reaction type flame retardant is further wrapped by the low-melting-point skin layer in the polyester fiber, so that the reaction type flame retardant is uniformly and firmly filled in the sound-absorbing cotton, and the flame retardant effect is stably achieved.
2. In the application, a bonding shell is preferably loaded on the plant fibers, and a plurality of flame retardant microspheres and bonding microspheres are wrapped in the bonding shell, so that the bonding shell occupies more space when the plant fibers are mixed and entangled with the polyester fibers. When the hot pressing is carried out, the bonding shell, the polyester fiber low-melting-point shell and the bonding agent shell are all melted, the bonding agent outflows to wrap the flame retardant microcapsules, the bonding property between the flame retardant microcapsules and the low-melting-point polyester is improved, the flame retardant can be uniformly dispersed in the melted low-melting-point leather layer, and the dispersion uniformity and the bonding firmness of the flame retardant in the sound-absorbing cotton are further improved. Meanwhile, due to the melting of the bonding shell, the space occupied by the bonding shell originally is reserved, and partial pores can be reserved after hot pressing, so that the pore structure in the sound-absorbing cotton material is further improved, and the sound-absorbing effect of the sound-absorbing cotton is improved.
3. Preferably introduce polyester film and polyester fiber screen cloth in this application, the stable combination fastness that improves polyester fiber, vegetable fibre and fire retardant microcapsule in inhaling the sound cotton to, polyester fiber screen cloth can divide the polyester film surface into a plurality of tiny independent units, and when the film took place to vibrate, the deformation that the screen cloth constraint independent unit film surface took place restricted the fibre friction vibration, has stably improved the acoustic loss, has improved the sound absorption effect who inhales the sound cotton promptly.
Drawings
FIG. 1 is a schematic view showing the structure of the sound-absorbing cotton of examples 14 to 16.
Description of the drawings: 1. a screen layer; 2. a thin film layer; 3. and a mixed layer.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation examples
Examples of production of plant fibers
Preparation example 1
Jute was used as the plant fiber 1.
Plant fibers include, but are not limited to: any one of jute, straw fiber and sisal fiber, jute is preferred in the embodiment.
Preparation example 2
Taking 4kg of ammonium phosphate and 2kg of phosphate, stirring and mixing to obtain a flame retardant modifier, soaking jute in a flame retardant modifying solution for 10min, taking out and airing to obtain the plant fiber 2.
Preparation example 3
The difference from preparation example 2 is that: soaking jute in 10 wt% alkali solution for 10min, washing, drying to obtain alkali treated fiber, placing the alkali treated fiber in low temperature plasma instrument, and performing plasma treatment to obtain surface treated jute to replace jute in preparation example 2 and prepare plant fiber 3.
Preparation of flame retardant microcapsules
Preparation examples 4 to 6
Respectively taking ammonium polyphosphate, microcrystalline cellulose, cyanuric acid and melamine, wherein the specific mass is shown in table 1, mixing the ammonium polyphosphate and the microcrystalline cellulose, dispersing the mixture in deionized water, adding the deionized water into a ball mill, performing ball milling for 3 hours at the rotor rotating speed of 3000r/min and the temperature of 25 ℃, performing centrifugal separation, retaining solids, and drying to obtain an intermediate product. Stirring and mixing the intermediate and cyanuric acid, dispersing into absolute ethyl alcohol, heating to 80 ℃, and stirring for 2 hours to obtain a mixed solution; and (2) dispersing melamine into absolute ethyl alcohol to obtain a dispersion liquid, dropwise adding the dispersion liquid into the mixed liquid within 10min, continuously reacting, centrifugally separating to retain solids, and drying to obtain the flame-retardant microcapsule 1-3.
TABLE 1 PREPARATION EXAMPLES 4-6 FLAME RETARDANT MICROCAPSULE COMPOSITION
Preparation example 7
And (3) soaking the flame-retardant microcapsule 2 in low-melting-point polyester, and cooling to obtain a flame-retardant microcapsule 4.
Preparation of bonded microspheres
Preparation examples 8 to 9
Taking silicon dioxide, a silane coupling agent KH560, polyacrylic acid and gelatin, wherein the specific mass is shown in Table 2, stirring and mixing the silicon dioxide, the silane coupling agent and the polyacrylic acid to obtain a core material, wrapping the core material with the molten gelatin, and drying to obtain the bonding microspheres 1-2.
TABLE 2 PREPARATION EXAMPLES 8-9 BONDED MICROSPHERE COMPOSITION
Preparation example 10
And taking the flame-retardant microcapsule 2 and the bonding microsphere 1, stirring and mixing to obtain a mixed microsphere, spraying molten low-melting-point polyester on the mixed microsphere, and drying to obtain the flame-retardant microcapsule 1 wrapped with the bonding shell.
Preparation example 11
The difference from preparation example 10 is that: a flame-retardant microcapsule 2 coated with a binder shell was prepared by using the binder microspheres 2 instead of the binder microspheres 1 in preparation example 10.
Preparation of hydrophilic flame-retardant polyester fiber
Preparation example 12
And (2) spraying a silane coupling agent on the hydrophilic flame-retardant polyester fiber, loading water-absorbent expanded resin microspheres (SAP type water-absorbent resin) on the hydrophilic polyester fiber, and drying to obtain the hydrophilic flame-retardant polyester fiber loaded with the water-absorbent resin.
Examples
Examples 1 to 3
In one aspect, the present application provides a polyester flame retardant sound absorbing cotton, which comprises plant fiber 2 and polyester fiber, and the specific quality is shown in table 3. The preparation method of the flame retardant-doped polyester fiber comprises the following steps: mixing a phosphaphenanthrene flame retardant (DOPO) and PET polyester to obtain the flame-retardant polyester. And (3) performing sheath-core spinning, molding and stretching on the flame-retardant polyester and the low-melting-point polyester to obtain the flame-retardant doped polyester fiber. Wherein the low-melting point polyester is YH101 type low-melting point polyester PETG.
Among them, it is worth mentioning: the flame retardant comprises any one of organic phosphorus flame retardant and germanium dioxide.
On the other hand, the application provides a preparation method of polyester flame-retardant sound-absorbing cotton, which comprises the following steps: and (2) taking polyester fibers and fibrilia, stirring and mixing, drying, opening and carding, cutting and paving, carrying out hot pressing at 190-200 ℃, and cooling to obtain the sound-absorbing cotton 1-3.
Table 3 examples 1-3 sound absorbing cotton compositions
Examples 4 to 5
The difference from example 3 is that: sound-absorbing cotton 4 to 5 was prepared by using plant fibers 1 and 3 instead of the plant fiber 2 in example 3.
Examples 6 to 11
The difference from example 3 is that: spraying a silane coupling agent kh570 on the plant fiber 3, then stirring and mixing the plant fiber 2, the flame-retardant microcapsules 1-4 and the flame-retardant microcapsules 1-2 wrapped with the bonding shells to obtain the loaded plant fiber to replace the plant fiber 2 in the example 3, and preparing the sound-absorbing cotton 6-11.
Example 12
The difference from example 3 is that: the polyester fiber included 5kg of the flame retardant-doped polyester fiber and 1kg of the hydrophilic flame retardant polyester fiber instead of the polyester fiber in example 3, and the sound-absorbing cotton 12 was prepared.
Example 13
The difference from example 3 is that: the polyester fiber included 5kg of the flame retardant-doped polyester fiber and 1kg of the hydrophilic flame retardant polyester fiber loaded with the water absorbent resin, instead of the polyester fiber in example 3, the sound-absorbing cotton 13 was prepared.
Example 14
The difference from example 3 is that: the sound-absorbing cotton further comprises a 0.05nm polyester film and a 20-mesh polyester fiber screen, so that the sound-absorbing cotton comprises a four-layer composite structure of a screen layer 1, a thin film layer 2, a mixed layer 3 consisting of polyester fibers and plant fibers and the screen layer 1 which are sequentially arranged from top to bottom, and the concrete structure is as shown in figure 1, and the sound-absorbing cotton 14 is prepared.
Example 15
The difference from example 14 is that: the sound-absorbing cotton 15 was prepared by using a 0.1nm polyester film and a 40 mesh polyester fiber mesh.
Example 16
The differences from example 14 are: the sound-absorbing cotton 16 is prepared by selecting a 0.2nm polyester film and a 60-mesh polyester fiber screen.
Example 17
The difference from example 3 is that: the sound-absorbing cotton also comprises a 0.05nm polyester film, and the sound-absorbing cotton 17 is prepared.
Comparative example
Comparative example 1
The comparative example is different from example 3 in that no plant fiber is added to the comparative example, and the sound-absorbing cotton 18 is prepared.
Comparative example 2
This comparative example is different from example 3 in that the polyester fiber is wrapped with an organic phosphorus flame retardant to prepare a sound-absorbing cotton 19.
Performance test
(1) Testing the sound absorption performance: according to the measurement of sound absorption coefficient and sound impedance in GB/T18696.2-2002 impedance tube, part 2: the transfer function method detects the sound absorption effect of the sound absorption cotton.
(2) And (3) detecting the flame retardant property: testing the flame retardant effect of the sound-absorbing cotton according to GB/T2406.2-2009 (determining the combustion behavior of plastics by an oxygen index method); and (3) a vertical combustion test, namely testing the flame retardant effect of the sound-absorbing cotton according to GB/T2408-2008 plastic combustion performance determination horizontal method and vertical method.
TABLE 4 Performance test Table
The comparison of the performance tests in combination with table 4 can find that:
(1) By combining examples 1-3, example 4, and comparative examples 1-2, it can be found that: the sound absorption effect and the flame retardant effect of the sound absorption cotton prepared in the embodiments 1 to 4 are improved, which shows that the application preferably adds the plant fiber with excellent sound absorption effect in the sound absorption cotton, and finishes the reaction type flame retardant on the plant fiber, thereby improving the sound absorption effect and the flame retardant property of the sound absorption cotton. Meanwhile, the flame retardant is preferably added in the polyester fiber, so that the bonding firmness between the flame retardant and the polyester fiber is improved, and the sound-absorbing cotton obtains an excellent and stable flame-retardant effect.
(2) A comparison of the combinations of example 5, examples 6 to 8, examples 9 to 11 and example 3 can be found: the sound absorption effect and the flame retardant effect of the sound absorption cotton prepared in the examples 5 to 11 are improved, which shows that the application preferably adopts the method that the plant fiber is loaded with the flame retardant microcapsule, and the flame retardant microcapsule is loaded through the pores on the plant fiber, so that the content of the flame retardant in the sound absorption cotton is improved. Through the surface treatment to vegetable fibre, increase vegetable fibre and go up hole quantity and attraction effect, reinforcing vegetable fibre is to the load fastness of fire retardant for but low melting point cortex firm connection vegetable fibre and polyester fiber improve and inhale the combination fastness between the cotton inside each fibre of sound. Through the setting of bonding shell, increase the size of loading microballon on vegetable fibre, can form great hole between vegetable fibre and polyester fiber, not only make fire-retardant microcapsule homodisperse after the hot pressing, can also inhale the sound cotton in forming the hole, improve and inhale the sound cotton sound absorption effect.
(3) A comparison of example 12, example 13 and example 3 shows that: examples 12-13 the flame retardant effect of the sound-absorbing cotton obtained in examples 5-11 was improved, which means that the hydrophilic flame retardant polyester fiber was added to the sound-absorbing cotton, so that the sound-absorbing cotton could absorb and store water vapor, and the tiny sparks were prevented from igniting the sound-absorbing cotton, and during combustion, the water was splashed to the sound-absorbing cotton, and the water-absorbing flame retardant polyester fiber absorbed water, and further spread of the fire on the sound-absorbing cotton was prevented.
(4) A comparison of examples 14-17 with example 3 shows that: the sound absorption effect and the flame retardant effect of the sound absorption cotton prepared in the embodiments 14 to 17 are improved, which indicates that the polyester fiber screen and the polyester film are added in the sound absorption cotton, and the polyester fiber screen not only pulls and wraps the fiber structure in the sound absorption cotton, so that the bonding firmness between the components in the sound absorption cotton is improved; the polyester film can be divided into a plurality of small independent units, so that the sound wave absorption effect of the sound absorption cotton is stably improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The polyester flame-retardant sound-absorbing cotton is characterized by comprising 20-40 mass ratio of plant fibers to 60-80 mass ratio of polyester fibers, wherein the polyester fibers comprise flame retardant doped polyester fibers, the flame retardant comprises organic phosphorus flame retardant or germanium dioxide, the polyester fibers are sheath-core type low-melting-point polyester composite fibers, and the plant fibers are plant fibers finished by a reaction type flame retardant.
2. The polyester flame-retardant sound-absorbing cotton as claimed in claim 1, wherein the plant fiber is loaded with flame-retardant microcapsules, and the preparation of the flame-retardant microcapsules comprises the following steps: respectively taking ammonium polyphosphate, microcrystalline cellulose, cyanuric acid and melamine according to the mass ratio of 4-8; stirring and mixing the intermediate and cyanuric acid, and dispersing into absolute ethyl alcohol to obtain a mixed solution; and (2) dispersing melamine into absolute ethyl alcohol to obtain a dispersion liquid, mixing the dispersion liquid with the mixed liquid, continuously reacting, centrifugally separating to retain solid matters, and drying to obtain the flame-retardant microcapsule.
3. The polyester flame-retardant sound-absorbing cotton according to claim 2, characterized in that: subjecting the plant fibers to a surface treatment comprising the steps of: soaking the plant fiber in alkali liquor, taking out and cleaning to obtain alkali-treated fiber; and (3) placing the alkali-treated fiber in a low-temperature plasma treatment instrument for plasma treatment to obtain the fibrilia subjected to surface treatment.
4. The polyester flame-retardant sound-absorbing cotton according to claim 2, characterized in that: the flame-retardant microcapsule is wrapped by a bonding shell, and the bonding shell is low-melting-point polyester.
5. The polyester flame-retardant sound-absorbing cotton according to claim 4, characterized in that: the adhesive shell is internally wrapped with adhesive microspheres, the adhesive microspheres comprise an adhesive and a shell, the adhesive comprises a silane coupling agent or polyacrylic acid, the adhesive further comprises silicon dioxide, and the shell comprises gelatin.
6. The polyester flame-retardant sound-absorbing cotton according to claim 1, characterized in that: and any one or two of a polyester film and a polyester fiber screen.
7. The polyester flame-retardant sound-absorbing cotton according to claim 6, wherein: the thickness of the polyester film is 0.05-0.2mm, and the mesh number of the polyester fiber screen is 20-40 meshes.
8. The polyester flame-retardant sound-absorbing cotton according to claim 1, characterized in that: the polyester fiber also comprises hydrophilic flame-retardant polyester fiber.
9. The preparation method of the polyester flame-retardant sound-absorbing cotton, which is characterized by comprising the following preparation steps of: taking polyester fibers and plant fibers, stirring and mixing, drying, opening and carding, cutting and paving, carrying out hot pressing at 190-200 ℃, and cooling to obtain the sound-absorbing cotton.
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