CN112125697A - Automotive interior material - Google Patents
Automotive interior material Download PDFInfo
- Publication number
- CN112125697A CN112125697A CN202010953124.7A CN202010953124A CN112125697A CN 112125697 A CN112125697 A CN 112125697A CN 202010953124 A CN202010953124 A CN 202010953124A CN 112125697 A CN112125697 A CN 112125697A
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- China
- Prior art keywords
- pet
- silicon dioxide
- sodium silicate
- fiber
- aqueous solution
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The invention discloses an automobile interior material, which is characterized in that a core layer material consisting of silicon dioxide aerogel and polyethylene terephthalate (PET) fibers is prepared by firstly fully mixing the PET fibers with a sodium silicate aqueous solution, then carrying out supercritical drying to generate a PET fiber-silicon dioxide aerogel composite material, and forming a framework supporting structure in the aerogel by the PET fibers after supercritical foaming; further compounding the upper and lower surfaces of the PET fiber-silicon dioxide aerogel composite material with a reinforcing layer to prepare a layered composite material applicable to automotive interior parts; the material has the characteristics of light weight, sound insulation and high noise reduction performance, has certain elasticity and bending resistance, is applied to parts such as an automotive interior ceiling, a front wall and the like, and can effectively reduce the noise in a cab.
Description
Technical Field
The invention belongs to the technical field of automotive interior materials, and particularly relates to an automotive interior material which has the advantages of light weight and high sound insulation performance.
Background
With the development of the automobile industry, people have higher and higher requirements on the fuel economy and the driving range of automobiles, and the pursuit of automobile interior for light weight is gradually improved, but the meeting of the lightweight interior becomes difficult when meeting the higher and higher NVH requirements, because the sound insulation material follows the mass law, namely, the larger the mass per unit area is, the better the sound insulation performance is. Therefore, the interior industry is developing materials that are lightweight and have better sound insulation properties.
The aerogel is a solid substance form and is a solid with the lowest density, and the basic preparation principle is to prepare sol first and then use supercritical drying to remove the solvent in the gel, so that the complete framework is kept, namely the sol-gel method. The porosity of the aerogel reaches 99.8 percent, the specific surface area is about 800-1500 square meters per gram, and the density can be as low as 3kg/m3The aperture is 10-50 nm and far lower than the free path of air by 70nm, so that the air is almost completely static in the holes, and the light sound insulation performance is excellent.
However, silica aerogel has poor texture flexibility, is not resistant to folding, has poor processability, and cannot be used alone basically, thereby limiting the application of the silica aerogel in the field of automotive interior to a certain extent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an automobile interior decoration material which can effectively reduce the noise in the automobile; through PET fiber composite reinforcement, the flexibility and the breaking resistance of the aerogel are improved while the sound insulation performance of the aerogel is exerted, so that the aerogel can be easily applied to automobile interior parts.
The technical scheme provided by the invention is as follows: the automobile interior material is characterized in that the preparation method comprises the following steps:
firstly, preparing sodium silicate and deionized water into a sodium silicate aqueous solution according to the volume ratio of 1: 4-1: 5, gradually dropwise adding concentrated sulfuric acid to adjust the pH value to 2, and uniformly stirring;
b, dropwise adding NaOH into the solution until the pH value is 7, and then adding polyethylene terephthalate (PET) fibers into the sodium silicate aqueous solution, wherein the weight ratio of the PET fibers: the weight ratio of the sodium silicate aqueous solution to the sodium silicate aqueous solution is 1: 20-1: 50, and the sodium silicate aqueous solution are fully mixed and then stand to obtain a PET fiber-silicon dioxide gel composite;
c, adding the PET fiber-silica gel composite obtained in the step b into 0.1mol/l sodium bicarbonate water solution for soaking for 12 hours;
d, immersing the PET fiber-silicon dioxide gel composite soaked in the sodium bicarbonate water solution in the step c into absolute ethyl alcohol, standing for 24-72 hours, transferring to a supercritical drying kettle, and finally obtaining the PET fiber-silicon dioxide aerogel composite, wherein the drying temperature is 65-80 ℃, the drying pressure is 8-10 Mpa, and the time is 8-12 hours;
e, slicing the PET fiber-silicon dioxide aerogel composite material according to the designed thickness;
and f, spraying hot melt adhesive on the enhancement layer of the automobile interior trim, then clamping the sliced PET fiber-silicon dioxide aerogel composite material in the enhancement layer, and mutually bonding the enhancement layer, the aerogel composite material and the enhancement layer by using the hot melt adhesive through a thermal compound machine to obtain the automobile interior trim material capable of effectively reducing the noise in the automobile.
Further, the enhancement layer in the step f is one or the combination of two of PET non-woven fabrics, pre-oxidized fiber felts and aluminum foil films.
Furthermore, the specification of the polyethylene terephthalate (PET) fiber in the step b is 0.03-3.33 dtex, and the length is 38-51 mm.
Further, the polyethylene terephthalate (PET) fiber in step b is preferably subjected to supercritical CO2Microcellular foamed PET fibers.
Compared with the prior art, the invention has the following beneficial effects:
1. the PET fibers and the silica gel are blended for supercritical drying, when the silica gel is prepared, the PET fibers also achieve the effect of microporous foaming after the supercritical drying, and the strength is obviously improved while the volume is expanded and the porosity is increased compared with that before the foaming;
2. the material disclosed by the invention is used for an inner and outer sound and heat insulation pad system of an automobile front panel, replaces the traditional PET hot melt felt or PU foaming material, can effectively reduce the weight by more than or equal to 2kg, and can improve the sound insulation capability by more than 2 dB;
3. the material disclosed by the invention is used between an automotive interior ceiling and a sheet metal top cover, replaces the traditional PET-PP double-component sound-absorbing cotton, can effectively isolate the noise of the car roof, reduces the vibration of the car roof and improves the sound quality in a passenger cabin;
4. the automobile interior material can be applied to various acoustic packaging parts of automobile interiors except for the front wall and the ceiling, plays a role in absorbing and insulating sound and effectively reduces the level of noise in the automobile.
Drawings
FIG. 1 is a diagram comparing example 1 of the present invention with a conventional scheme.
Detailed Description
For a better understanding and practice, specific examples are given below to illustrate the invention in detail.
Embodiment 1, a method for preparing an automotive interior material, the method comprising the steps of: firstly, preparing sodium silicate aqueous solution from sodium silicate and deionized water according to the volume ratio of 1:4, gradually dropwise adding concentrated sulfuric acid to adjust the pH value to 2, and uniformly stirring; adding NaOH dropwise into the solution until the pH value is 7, and then adding supercritical CO with the specification of 3.33dtex and the length of 51mm2Adding microporous foamed PET fibers into the sodium silicate aqueous solution, controlling the weight ratio of the PET fibers to the sodium silicate aqueous solution to be 1:20, fully mixing the PET fibers and the sodium silicate aqueous solution, and standing for 30min to obtain a PET fiber-silicon dioxide gel complex; adding the PET fiber-silica gel complex into 0.1mol/l sodium bicarbonate water solution, soaking for 12h, soaking the PET fiber-silica gel complex soaked by the sodium bicarbonate water solution into absolute ethyl alcohol, standing for 24h, transferring to a supercritical drying kettle, and dryingControlling the drying temperature at 80 ℃, the drying pressure at 8Mpa and the drying time at 8 hours to finally obtain the PET fiber-silicon dioxide aerogel composite material; slicing the PET fiber-silicon dioxide aerogel composite material according to the designed thickness of 15 mm; spraying hot melt adhesive on the pre-oxidized fiber felt, then clamping the sliced PET fiber-silicon dioxide aerogel composite material in the pre-oxidized fiber felt, and mutually bonding the reinforcing layer, the aerogel composite material and the reinforcing layer by using the hot melt adhesive through a thermal compound machine to prepare the automobile interior trim material capable of effectively reducing the noise in the automobile; after mould pressing, forming and cutting, the material is attached to the inside of a front wall metal plate of an automobile to replace the traditional PU foam material for preparing a front wall inner sound insulation and heat insulation pad part.
The sound insulation capability of the front wall internal sound insulation and heat insulation pad part prepared in the embodiment 1 is improved by about 3dB compared with that of the traditional scheme, and the weight of the part is reduced by 66% (the surface density of the PU foaming material in the traditional scheme is 825 g/square meter, and the density of the material in the invention is 280 g/square meter), as shown in figure 1.
Embodiment 2, a method for preparing an automotive interior material, the method comprising the steps of: firstly, preparing sodium silicate aqueous solution from sodium silicate and deionized water according to the volume ratio of 1:4, gradually dropwise adding concentrated sulfuric acid to adjust the pH value to 2, and uniformly stirring; dropwise adding NaOH into the solution until the pH value is 7, then adding PET fibers with the specification of 0.03dtex and the length of 38mm into the sodium silicate aqueous solution, controlling the weight ratio of the PET fibers to the sodium silicate aqueous solution to be 1:50, fully mixing the PET fibers and the sodium silicate aqueous solution, and standing for 60min to obtain a PET fiber-silicon dioxide gel composite; adding the PET fiber-silicon dioxide gel complex into 0.1mol/l sodium bicarbonate water solution, soaking for 12h, soaking the PET fiber-silicon dioxide gel complex soaked by the sodium bicarbonate water solution into absolute ethyl alcohol, standing for 72h, transferring to a supercritical drying kettle, controlling the drying temperature to be 65 ℃, the drying pressure to be 10Mpa, and the time to be 12h, and finally obtaining the PET fiber-silicon dioxide aerogel composite material; slicing the PET fiber-silicon dioxide aerogel composite material according to the designed thickness of 15 mm; spraying hot melt adhesive on the PET non-woven fabric, then clamping the sliced PET fiber-silicon dioxide aerogel composite material in the PET non-woven fabric, and mutually bonding the reinforcing layer and the PET fiber-silicon dioxide aerogel composite material by using the hot melt adhesive through a thermal compound machine to prepare the automobile interior trim material capable of effectively reducing the noise in the automobile; after being cut, the material is directly attached between an automobile ceiling inner decoration and a top cover metal plate, replaces the traditional PET-PP double-component material, is used as ceiling sound-absorbing cotton, and plays the roles of sound absorption and noise reduction.
The sound absorption coefficient of the sound absorption cotton for the ceiling prepared in the example 2 is improved by about 0.2 compared with that of the traditional scheme, and the weight of parts is reduced by 33% (in the traditional scheme, the density of the PET-PP double-component sound absorption cotton is 300 g/square meter, and the density of the material is 200 g/square meter).
Embodiment 3, a method for preparing an automotive interior material, the method comprising the steps of: firstly, preparing sodium silicate aqueous solution from sodium silicate and deionized water according to the volume ratio of 1:5, gradually dropwise adding concentrated sulfuric acid to adjust the pH value to 2, and uniformly stirring; dropwise adding NaOH into the solution until the pH value is 7, then adding PET fibers with the specification of 1.67dtex and the length of 38mm into the sodium silicate aqueous solution, controlling the weight ratio of the PET fibers to the sodium silicate aqueous solution to be 1:30, fully mixing the PET fibers and the sodium silicate aqueous solution, and standing for 45min to obtain a PET fiber-silicon dioxide gel composite; adding the PET fiber-silicon dioxide gel complex into 0.1mol/l sodium bicarbonate water solution, soaking for 12h, soaking the PET fiber-silicon dioxide gel complex soaked by the sodium bicarbonate water solution into absolute ethyl alcohol, standing for 48h, transferring to a supercritical drying kettle, controlling the drying temperature to be 75 ℃, the drying pressure to be 9Mpa, and the time to be 10 h, and finally obtaining the PET fiber-silicon dioxide aerogel composite material; slicing the PET fiber-silicon dioxide aerogel composite material according to the thickness of 25 mm; respectively spraying hot melt adhesive on the aluminum foil film and the PET non-woven fabric, then sequentially stacking the aluminum foil film, the PET fiber-silicon dioxide aerogel composite material and the PET non-woven fabric, and mutually bonding the three layers of materials by using the hot melt adhesive through a thermal compound machine to prepare the automobile interior material capable of effectively reducing the noise in the automobile; after this material compression molding, the laminating encloses the panel beating outside before the car, replaces traditional aluminium foil membrane + PU + PET material, encloses outer sound absorption pad before as, and the effect of making an uproar falls in the sound is inhaled in the performance.
The sound absorption coefficient of the sound absorption cotton of the ceiling prepared in the example 3 is improved by about 0.2 compared with that of the traditional scheme, and the weight of parts is reduced by 36% (in the traditional scheme, the surface density of the aluminum foil film plus PU plus PET material is 625 g/square meter, and the surface density of the material is 420 g/square meter).
It should be understood that technical features not described in detail in the specification belong to the prior art. Although the present invention has been described in connection with the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention.
Claims (4)
1. The automotive interior material is characterized in that the preparation method comprises the following steps:
firstly, preparing sodium silicate and deionized water into a sodium silicate aqueous solution according to the volume ratio of 1: 4-1: 5, gradually dropwise adding concentrated sulfuric acid to adjust the pH value to 2, and uniformly stirring;
b, dropwise adding NaOH into the solution until the pH value is 7, and then adding polyethylene terephthalate (PET) fibers into the sodium silicate aqueous solution, wherein the weight ratio of the PET fibers: the weight ratio of the sodium silicate aqueous solution to the sodium silicate aqueous solution is 1: 20-1: 50, and the sodium silicate aqueous solution are fully mixed and then stand to obtain a PET fiber-silicon dioxide gel composite;
c, adding the PET fiber-silica gel composite obtained in the step b into 0.1mol/l sodium bicarbonate water solution for soaking for 12 hours;
d, immersing the PET fiber-silicon dioxide gel composite soaked in the sodium bicarbonate water solution in the step c into absolute ethyl alcohol, standing for 24-72 hours, transferring to a supercritical drying kettle, and finally obtaining the PET fiber-silicon dioxide aerogel composite, wherein the drying temperature is 65-80 ℃, the drying pressure is 8-10 Mpa, and the time is 8-12 hours;
e, slicing the PET fiber-silicon dioxide aerogel composite material according to the designed thickness;
and f, spraying hot melt adhesive on the enhancement layer of the automobile interior trim, then clamping the sliced PET fiber-silicon dioxide aerogel composite material in the enhancement layer, and mutually bonding the enhancement layer, the aerogel composite material and the enhancement layer by using the hot melt adhesive through a thermal compound machine to obtain the automobile interior trim material capable of effectively reducing the noise in the automobile.
2. The automotive interior material of claim 1, wherein the reinforcement layer in step f is one or a combination of two of a PET non-woven fabric, a pre-oxidized fiber felt and an aluminum foil film.
3. The automotive interior material of claim 1, wherein the polyethylene terephthalate (PET) fiber of step b has a gauge of 0.03 to 3.33dtex and a length of 38 to 51 mm.
4. The automotive interior material according to claim 1 or 3, wherein the polyethylene terephthalate (PET) fibers in the step b are preferably PET fibers subjected to micro-pore foaming by supercritical CO 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010953124.7A CN112125697A (en) | 2020-09-11 | 2020-09-11 | Automotive interior material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010953124.7A CN112125697A (en) | 2020-09-11 | 2020-09-11 | Automotive interior material |
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| CN112125697A true CN112125697A (en) | 2020-12-25 |
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| CN202010953124.7A Pending CN112125697A (en) | 2020-09-11 | 2020-09-11 | Automotive interior material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051260A1 (en) * | 2021-09-29 | 2023-04-06 | 无锡吉兴汽车声学部件科技有限公司 | Lightweight sound deadening pad, and manufacturing method therefor and use thereof |
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| US20050192201A1 (en) * | 2004-01-26 | 2005-09-01 | Francis Cornelio Ford | Dishwashing wipe |
| CN204149623U (en) * | 2013-09-07 | 2015-02-11 | 浙江华江科技发展有限公司 | A kind of high tenacity, high sound-absorbing wheel cover of automobile backplate plastic composite board material |
| CN107709013A (en) * | 2016-02-05 | 2018-02-16 | Skc株式会社 | Aerogel composite and preparation method thereof |
| CN108658576A (en) * | 2018-06-28 | 2018-10-16 | 盱眙博图凹土股份有限公司 | A kind of preparation method of composite silicon dioxide aerogel blanket |
| CN110329175A (en) * | 2019-05-23 | 2019-10-15 | 连云港冠泰汽车配件有限公司 | A kind of passive acoustic material of passenger car crew module NVH |
| CN110735198A (en) * | 2019-11-29 | 2020-01-31 | 福建六树网络科技有限公司 | modified PET polyester fiber, preparation method thereof and polyester fabric |
| CN110846735A (en) * | 2019-11-06 | 2020-02-28 | 青岛百草新材料股份有限公司 | Plant functional automobile roof |
-
2020
- 2020-09-11 CN CN202010953124.7A patent/CN112125697A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050192201A1 (en) * | 2004-01-26 | 2005-09-01 | Francis Cornelio Ford | Dishwashing wipe |
| CN204149623U (en) * | 2013-09-07 | 2015-02-11 | 浙江华江科技发展有限公司 | A kind of high tenacity, high sound-absorbing wheel cover of automobile backplate plastic composite board material |
| CN107709013A (en) * | 2016-02-05 | 2018-02-16 | Skc株式会社 | Aerogel composite and preparation method thereof |
| CN108658576A (en) * | 2018-06-28 | 2018-10-16 | 盱眙博图凹土股份有限公司 | A kind of preparation method of composite silicon dioxide aerogel blanket |
| CN110329175A (en) * | 2019-05-23 | 2019-10-15 | 连云港冠泰汽车配件有限公司 | A kind of passive acoustic material of passenger car crew module NVH |
| CN110846735A (en) * | 2019-11-06 | 2020-02-28 | 青岛百草新材料股份有限公司 | Plant functional automobile roof |
| CN110735198A (en) * | 2019-11-29 | 2020-01-31 | 福建六树网络科技有限公司 | modified PET polyester fiber, preparation method thereof and polyester fabric |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051260A1 (en) * | 2021-09-29 | 2023-04-06 | 无锡吉兴汽车声学部件科技有限公司 | Lightweight sound deadening pad, and manufacturing method therefor and use thereof |
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Application publication date: 20201225 |