CN104085138B - Composite board and its preparation method and application - Google Patents
Composite board and its preparation method and application Download PDFInfo
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- CN104085138B CN104085138B CN201410307227.0A CN201410307227A CN104085138B CN 104085138 B CN104085138 B CN 104085138B CN 201410307227 A CN201410307227 A CN 201410307227A CN 104085138 B CN104085138 B CN 104085138B
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- 239000002131 composite material Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000006260 foam Substances 0.000 claims abstract description 105
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000003365 glass fiber Substances 0.000 claims description 54
- 239000004745 nonwoven fabric Substances 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 46
- 239000003292 glue Substances 0.000 claims description 30
- 238000000465 moulding Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000004814 polyurethane Substances 0.000 claims description 12
- 239000011265 semifinished product Substances 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 21
- 238000009940 knitting Methods 0.000 abstract description 3
- 239000011521 glass Substances 0.000 abstract 6
- 230000008569 process Effects 0.000 description 28
- 238000010521 absorption reaction Methods 0.000 description 20
- 239000000047 product Substances 0.000 description 15
- 239000004744 fabric Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007723 die pressing method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- -1 respectively Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a kind of composite board and its preparation method and application, this composite board comprises: the first nonwoven layer; The first glass carpet veneer, described the first glass carpet veneer is arranged at the upper surface of described the first nonwoven layer; The first foam flaggy, described the first foam flaggy is arranged at the upper surface of described the first glass carpet veneer; The second nonwoven layer, described the second nonwoven layer is arranged at the upper surface of described the first foam flaggy; The second foam flaggy, described the second foam flaggy is arranged at the upper surface of described the second nonwoven layer; The second glass carpet veneer, described the second glass carpet veneer is arranged at the upper surface of described the second foam flaggy; And the knitting bed of material, the described knitting bed of material is arranged at the upper surface of described the second glass carpet veneer. This composite board has higher intensity, high temperature resistant and sound-absorbing sound insulation value.
Description
Technical Field
The invention belongs to the technical field of material processing, and particularly relates to a composite board and a preparation method and application thereof.
Background
The automobile ceiling is mainly divided into two molding processes, namely a wet molding process and a dry molding process; the wet forming process is divided into a wet one-step forming process and a wet two-step forming process, and the forming process is described as follows:
(1) the dry forming process, also called hot material cold mould forming process, the raw material is mainly divided into two major parts, which are respectively PU composite board and composite knitted fabric, the main process flow is as follows: heating the PU composite board (the temperature is recommended to be set to be 240-280 ℃ in an oven, the surface temperature of the raw material after heating and baking is 190 +/-10 ℃), performing compression molding on the PU composite board after tensioning the composite knitted fabric and after heating and baking in advance (the pressure is required to be maintained to be 9 +/-1 Mpa, the pressure maintaining time is 60 +/-5 seconds, and the temperature of a mold is less than or equal to 30 ℃), finishing the manufacturing of a semi-finished product, and then performing water jet cutting and the attachment bonding of the post-process to finish the manufacturing of a finished product. However, the dry-process ceiling is bonded by using a PE adhesive film, which results in poor high temperature resistance of the product, and meanwhile, the dry-process ceiling is difficult to form at a position with large local stretching, and the molded surface is too smooth, so that the assembly is easy to cause a matching problem, which affects the quality of the whole vehicle.
(2) The wet one-step forming process, also called cold material hot die forming process, the raw material mainly comprises 5 layers of structures, the structures from top to bottom mainly comprise composite knitted fabric, glass fiber felt, foam board, glass fiber felt and bottom non-woven fabric, and the main process flow is as follows: after the foam board is sprayed with water by double-sided roll glue (the total amount of the roll glue is generally 100 g/m)2The roll sizing and water spraying proportion is 2: 1) and then, overlapping other materials, sending the materials into a mold cavity for mold pressing (the mold temperature is required to be (130 +/-10) DEG C, the mold pressure is required to be (10 +/-1) MPa, the pressure maintaining time is required to be (40 +/-5) s), vacuumizing, cooling and shaping (the shaping time is required to be (40 +/-5) s) after the mold pressing is finished, and cutting by a water jet cutter and bonding accessories of the post-process after the cooling and shaping are finished to obtain the finished product. However, the method of makingThe one-step molding process in the molding process is limited by the influence of product strength, generally adopts the problems of small upper layer glue amount, large lower layer glue amount, poor appearance at small gaps and incapability of repairing products.
(3) The wet two-step forming process, also called cold material hot die forming process, the raw material mainly comprises 6 layers of structures, the structures from top to bottom mainly comprise composite knitted fabric, upper non-woven fabric, glass fiber felt, foam board, glass fiber felt and bottom non-woven fabric, and the main process flow is as follows: after the foam board is sprayed with water by double-sided roll glue (the total amount of the roll glue is generally 100 g/m)2The roll sizing and water spraying proportion is 2: 1) then, stacking materials (upper-layer non-woven fabric, glass fiber felt, foam board after roller glue, glass fiber felt and bottom-layer non-woven fabric from top to bottom), sending the materials into a die cavity for die pressing (the temperature of the die is required to be (140 +/-10) DEG C, the pressure of the die is (11 +/-1) MPa, the pressure maintaining time is (40 +/-5) s), vacuumizing, cooling and shaping (the shaping time is (40 +/-5) s) after the die pressing is finished, and finishing the manufacturing of a semi-finished product framework after the cooling and shaping; and then spraying glue on the upper layer of the framework, performing pressure maintaining bonding on the framework and the fabric tensioned in advance (the temperature of a mould is required to be (100 +/-10) ° C, the pressure maintaining pressure is (7 +/-1) MPa, the pressure maintaining time is (35 +/-5) s), vacuumizing, cooling and shaping (the shaping time is (30 +/-5) s) after the pressure maintaining is finished to finish the manufacturing of a semi-finished product, and then performing water jet cutting and post-process accessory bonding to finish the manufacturing of a finished product. However, the glue produced by the wet two-step molding process is polyurethane thermosetting glue, needs to absorb the humidity reaction in the air for bonding, has high requirement on the environment, is easy to cause the problem of large-area glue opening because the solvent is not volatilized completely, has uneven product strength and has IPTV risk: the ceiling is thinned at the boundary (beneficial to assembly and air bag blasting), and the ceiling boundary in the dry and wet processes is damaged in an internal structure due to the fact that the foam board is compressed beyond the limit, and the strength of the ceiling is reduced, so that the risk that the ceiling is separated from an adhesive tape after sale exists.
Therefore, the existing automobile ceiling forming process is to be further researched.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a composite board, a preparation method and application thereof, wherein the composite board has high strength, high temperature resistance and sound absorption and insulation performance.
In one aspect of the present invention, there is provided a composite board comprising:
a first nonwoven layer;
the first glass fiber felt layer is arranged on the upper surface of the first non-woven fabric layer;
the first foam board layer is arranged on the upper surface of the first glass fiber felt layer;
a second nonwoven fabric layer disposed on an upper surface of the first foam board layer;
a second foam board layer disposed on an upper surface of the second nonwoven fabric layer;
the second glass fiber felt layer is arranged on the upper surface of the second foam board layer; and
and the knitted material layer is arranged on the upper surface of the second glass fiber felt layer.
The composite board provided by the embodiment of the invention has the advantages of higher strength, high temperature resistance, sound absorption and sound insulation performance.
In addition, the composite board according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, the first nonwoven layer is selected from a spunlace nonwoven or a laminated nonwoven, and the second nonwoven layer is a spunlace nonwoven.
In some embodiments of the present invention, the first foam board layer has a density of 30 to 35kg/m3The first mentionedThe density of the two foam board layers is 20-25 kg/m3. Therefore, the sound absorption and insulation performance of the composite board can be remarkably improved.
In some embodiments of the invention, the first foam ply and the second foam ply each independently have a thickness of 3.5 millimeters. This can further improve the sound absorption and insulation performance of the composite board.
In another aspect of the present invention, the present invention provides a method for preparing the above composite board, comprising:
(1) sequentially stacking the first non-woven fabric, the first glass fiber felt, the first foam board, the second non-woven fabric, the second foam board, the second glass fiber felt and the knitted material so as to obtain a multilayer board;
(2) performing pressure maintaining molding on the multilayer board obtained in the step (1) in a mold cavity so as to obtain a semi-finished product; and
(3) and (3) cooling, adsorbing and shaping the semi-finished product obtained in the step (2) so as to obtain the composite board.
According to the method for preparing the composite board, the composite board with high strength, high temperature resistance and sound absorption and insulation performance can be effectively prepared.
In addition, the method for preparing the composite board according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the method of making a composite panel further comprises: before the first non-woven fabric, the first glass fiber felt, the first foam board, the second non-woven fabric, the second foam board, the second glass fiber felt and the knitted material are superposed in sequence, the upper surface and the lower surface of the first foam board and the second foam board are respectively coated with polyurethane thermosetting glue in advance, wherein the roll glue amount of the upper surface of the first foam board and the second foam board is 15-25 g/m2Under the first and second foam boardsThe surface roll coating amount is 35-45 g/m2. Therefore, the high-temperature resistance of the composite board can be obviously improved.
In some embodiments of the present invention, after the upper and lower surfaces of the first and second foam boards are coated with the polyurethane thermosetting glue, respectively, water is sprayed on the upper and lower surfaces of the first and second foam boards, and the mass ratio of the amount of the roll glue to the water is 2: 1. therefore, the dependence of the composite board on the environment can be obviously reduced.
In some embodiments of the present invention, the grammage of the first and second glass fiber mats is independently 100 to 150g/m2The pressure maintaining molding is carried out for 35-45 seconds at the mold temperature of 135-145 ℃ and the mold pressing pressure of 9-11 MPa, and the cooling adsorption molding is carried out for 35-45 seconds in a vacuum adsorption mechanism. Therefore, the strength, high temperature resistance, sound absorption and sound insulation performance of the composite board can be further improved.
In a third aspect of the present invention, the present invention provides an automobile ceiling, which is prepared from the above-described composite sheet material. Therefore, the automobile ceiling has high strength, high temperature resistance and sound absorption and insulation performance.
In a fourth aspect of the invention, the invention provides a motor vehicle having a motor vehicle roof as described above. Because this car has used above-mentioned car roof, can play the effect that gives sound insulation effectively, and then avoid automobile body top cap external noise to pass inside the carriage.
Drawings
FIG. 1 is a schematic view of a composite sheet structure according to one embodiment of the present invention;
FIG. 2 is a schematic flow diagram of a method of making a composite panel according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the invention, a composite board is provided. A composite board according to an embodiment of the present invention will be described in detail with reference to fig. 1. According to an embodiment of the present invention, the composite board comprises: a first non-woven fabric layer 100, a first glass fiber felt layer 200, a first foam board layer 300, a second non-woven fabric layer 400, a second foam board layer 500, a second glass fiber felt layer 600 and a knit layer 700. According to the embodiment of the present invention, the first glass fiber mat layer 200 is disposed on the upper surface of the first glass fiber mat layer 100, the first foam board layer 300 is disposed on the upper surface of the first glass fiber mat layer 200, the second nonwoven fabric layer 400 is disposed on the upper surface of the first foam board layer 300, the second foam board layer 500 is disposed on the upper surface of the second nonwoven fabric layer 400, the second glass fiber mat layer 600 is disposed on the upper surface of the second foam board layer 500, and the knit layer 700 is disposed on the upper surface of the second glass fiber mat layer 600.
According to an embodiment of the invention, the first nonwoven layer is selected from a spunlace nonwoven or a laminated nonwoven and the second nonwoven layer is a spunlace nonwoven. According to the embodiment of the invention, the gram weight of the first glass fiber felt layer and the gram weight of the second glass fiber felt layer can be 100-150 g/m independently2. The inventor finds that selecting the glass fiber felt in the range can obviously improve the composite boardStrength of the material.
According to an embodiment of the present invention, the density of the first foam board layer may be 30 to 35kg/m3The density of the second foam board layer can be 20-25 kg/m3. The inventor finds that the sound absorption and insulation effects can be effectively achieved by using the double-layer foam boards with different densities in the composite board, and the inventor finds that the composite board obtained by selecting the foam board combination with the density range of the invention has the best sound absorption and insulation performance through a large amount of screening.
The thickness of the first foam ply and the second foam ply is not particularly limited according to an embodiment of the present invention, and may be 3.5 mm independently according to a specific embodiment of the present invention. The inventors have found that foam boards of this thickness provide the best sound absorption and insulation properties of the composite board. According to embodiments of the present invention, the thickness of the foam board may be selected according to actual needs. Therefore, the strength, high temperature resistance and sound absorption and insulation performance of the composite board can be obviously improved.
In another aspect of the invention, a method of making the above composite board is provided. A method of manufacturing a composite board according to an embodiment of the present invention will be described in detail with reference to fig. 2. According to an embodiment of the invention, the method comprises:
s100: superposition
According to the embodiment of the present invention, the first nonwoven fabric, the first glass fiber mat, the first foam sheet, the second nonwoven fabric, the second foam sheet, the second glass fiber mat, and the knit are sequentially stacked, so that a multi-layer sheet can be obtained. The specific types of the first nonwoven fabric and the second nonwoven fabric are not particularly limited according to an embodiment of the present invention, and the first nonwoven fabric layer may be selected from a spunlace nonwoven fabric or a laminated nonwoven fabric and the second nonwoven fabric layer may be a spunlace nonwoven fabric according to an embodiment of the present invention. The specific types of the first and second glass fiber mats according to the embodiment of the present invention are not particularly limited, and the first and second glass fiber mats according to the embodiment of the present inventionThe gram weight of the two-glass fiber felt can be independently 100-150 g/m2. The inventors have found that selecting a glass fiber mat in this range can significantly improve the strength of the composite sheet. According to an embodiment of the present invention, the densities of the first foam sheet and the second foam sheet are not particularly limited, and according to a specific embodiment of the present invention, the density of the first foam sheet may be 30 to 35kg/m3The density of the second foam board can be 20-25 kg/m3. The inventor finds that the sound absorption and insulation effects can be effectively achieved by using the double-layer foam boards with different densities in the composite board, and the inventor finds that the composite board obtained by selecting the foam board combination with the density range of the invention has the best sound absorption and insulation performance through a large amount of screening. The thickness of the first foam ply and the second foam ply is not particularly limited according to an embodiment of the present invention, and may be 3.5 mm independently according to a specific embodiment of the present invention. The inventors have found that foam boards of this thickness provide the best sound absorption and insulation properties of the composite board. According to embodiments of the present invention, the thickness of the foam board may be selected according to actual needs. Therefore, the strength, high temperature resistance and sound absorption and insulation performance of the composite board can be obviously improved.
According to the embodiment of the invention, before the first nonwoven fabric, the first glass fiber felt, the first foam board, the second nonwoven fabric, the second foam board, the second glass fiber felt and the knitting material are sequentially overlapped, the upper surface and the lower surface of the first foam board and the second foam board are respectively coated with polyurethane thermosetting glue in advance. The inventor finds that the polyurethane thermosetting glue adopted in the process can effectively avoid the problem of large-area glue opening caused by incomplete volatilization of the solvent compared with a wet two-step molding process, and can obviously improve the high-temperature resistance of the composite board compared with a dry molding process.
In this step, the first nonwoven fabric, the first glass fiber mat, the first foam board, the second nonwoven fabric, the second foam board, the second glass fiber mat and the knitted fabric may be stacked according to the following method: firstly, cutting a non-woven fabric and a glass fiber felt to obtain a first non-woven fabricThe second non-woven fabric, the first glass fiber felt and the second glass fiber felt; then, the upper surfaces and the lower surfaces of the first foam board and the second foam board are subjected to roll coating, wherein the roll coating amount of the upper surfaces of the first foam board and the second foam board can be 15-25 g/m2The amount of the rolling glue on the lower surfaces of the first foam board and the second foam board can be 35-45 g/m2And spraying water to the upper and lower surfaces of the first and second foam boards after the upper and lower surfaces of the first and second foam boards are roll-glued, wherein the mass ratio of the roll-glued amount to the water may be 2: 1; then, overlapping the cut first non-woven fabric and the first glass fiber felt and adhering the first non-woven fabric and the first glass fiber felt to the lower surface of the first foam board, wherein the lower surface of the first foam board is in contact with the upper surface of the first glass fiber felt; then adhering the second non-woven fabric to the upper surface of the first foam board, and contacting the lower surface of the second foam board with the upper surface of the second non-woven fabric; and finally, overlapping the second glass fiber felt and the knitted fabric and adhering the second glass fiber felt and the knitted fabric to the upper surface of the second foam board, wherein the lower surface of the second glass fiber felt is in contact with the upper surface of the second foam board, so that the multilayer board can be obtained.
S200: pressure maintaining forming
According to an embodiment of the present invention, the multilayer sheet obtained as described above is subjected to pressure-holding molding in a mold cavity, whereby a semi-finished product can be obtained. According to an embodiment of the present invention, the pressure-maintaining molding conditions are not particularly limited, and according to an embodiment of the present invention, the pressure-maintaining molding may be performed at a mold temperature of 135 to 145 ℃ and a mold pressure of 9 to 11MPa for 35 to 45 seconds. In the step, specifically, under a high temperature condition, isocyanate in polyurethane glue reacts with water to generate thermosetting materials urea and gaseous carbon dioxide, so that a semi-finished product can be obtained.
S300: cooling, adsorbing and shaping
According to the embodiment of the invention, the semi-finished product obtained above is cooled, adsorbed and shaped, so that the composite board can be obtained. According to an embodiment of the present invention, the cooling and suction forming conditions are not particularly limited, and according to an embodiment of the present invention, the cooling and suction forming may be performed in a vacuum suction mechanism for 35 to 45 seconds. The inventor finds that if the temperature reduction process of the semi-finished product obtained by the pressure maintaining molding is slow, the semi-finished product is easy to cause that the glue is not cured completely after reaction, so that the product has low strength and is easy to deform, and the product can be cured (the temperature is instantly reduced from high temperature to normal temperature) at the highest speed on the premise of ensuring the molded surface by cooling, adsorbing and shaping, so as to finally reach the required strength.
As described above, the method of manufacturing a composite board according to an embodiment of the present invention may have at least one of the following advantages selected from:
the composite board obtained by the method for preparing the composite board has higher high-temperature resistance, and the polyurethane thermosetting glue is used, so that the reaction can be completely carried out at one time and then is not carried out any more;
the composite board obtained by the method for preparing the composite board has good forming performance, and the good forming performance of a product can be ensured by adopting a wet forming process, namely a cold material hot die forming process;
the composite board obtained by the method for preparing the composite board has good sound absorption performance, and in order to avoid poor sound absorption performance of a product due to the self-reason of the foam board, the foam boards are combined by using the double-layer foam boards with different densities aiming at the sound absorption performance of different foam boards in different wave bands, so that the good sound absorption performance of the product is ensured;
according to the method for preparing the composite board, the yield of the composite board is high, the double-layer foam board combination process is adopted, the glue amount is divided into four parts to be distributed in the base material, and appearance quality problems such as glue penetration of the product and the like are eliminated;
the composite board obtained by the method for preparing the composite board is high in strength and low in IPTV risk, the problem of boundary layering can be fundamentally solved, the glue is uniformly filled in the foam board, the product boundary strength is improved, and the IPTV risk is avoided;
compared with the wet forming process, the composite board obtained by the method for preparing the composite board is low in external factor, and water is sprayed after the foam board is glued by a roller, so that the dependence on the environment can be obviously reduced;
the composite board obtained by the method for preparing the composite board has effective sound insulation performance, the foam board in the base material is made of sound-absorbing materials, and the non-woven fabric is additionally arranged in the middle of the base material for gluing, so that the sound insulation effect is effectively achieved.
In a third aspect of the present invention, an automotive headliner is provided. According to an embodiment of the invention, the automobile ceiling is prepared by adopting the composite board. According to the embodiment of the invention, the obtained composite board is cut by using a water jet according to the requirement, and the local position of the product is flanged and the cushion block is buckled and bonded according to the requirement, so that the automobile ceiling can be obtained. Therefore, the automobile ceiling has high strength, high temperature resistance and sound absorption and insulation performance.
In a fourth aspect of the invention, the invention provides a vehicle, which has the vehicle roof. Because this car has used above-mentioned car roof, can play the effect that gives sound insulation effectively, and then avoid automobile body top cap external noise to pass inside the carriage.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A composite panel, comprising:
a first nonwoven layer;
the first glass fiber felt layer is arranged on the upper surface of the first non-woven fabric layer;
the first foam board layer is arranged on the upper surface of the first glass fiber felt layer;
a second nonwoven fabric layer disposed on an upper surface of the first foam board layer;
a second foam board layer disposed on an upper surface of the second nonwoven fabric layer;
the second glass fiber felt layer is arranged on the upper surface of the second foam board layer; and
a knitted material layer arranged on the upper surface of the second glass fiber felt layer,
wherein,
the density of the first foam board layer is 30-35 kg/m3The density of the second foam board layer is 20-25 kg/m3，
The first foam ply and the second foam ply each independently have a thickness of 3.5 millimeters.
2. The composite board as claimed in claim 1, wherein the first nonwoven fabric layer is selected from a spunlace nonwoven fabric or a laminated nonwoven fabric, and the second nonwoven fabric layer is a spunlace nonwoven fabric.
3. A method of making the composite panel of claim 1 or 2, comprising:
(1) sequentially stacking the first non-woven fabric, the first glass fiber felt, the first foam board, the second non-woven fabric, the second foam board, the second glass fiber felt and the knitted material so as to obtain a multilayer board;
(2) performing pressure maintaining molding on the multilayer board obtained in the step (1) in a mold cavity so as to obtain a semi-finished product; and
(3) and (3) cooling, adsorbing and shaping the semi-finished product obtained in the step (2) so as to obtain the composite board.
4. The method of making a composite panel as set forth in claim 3, further including: before the first non-woven fabric, the first glass fiber felt, the first foam board, the second non-woven fabric, the second foam board, the second glass fiber felt and the knitted material are sequentially superposed, the upper surface and the lower surface of the first foam board and the lower surface of the second foam board are respectively coated in advanceApplying polyurethane thermosetting glue, wherein the rolling glue amount of the upper surfaces of the first foam board and the second foam board is 15-25 g/m2The amount of the rolling glue on the lower surfaces of the first foam board and the second foam board is 35-45 g/m2。
5. The method for preparing a composite board according to claim 4, wherein water is sprayed on the upper and lower surfaces of the first and second foam boards after the polyurethane thermosetting glue is applied on the upper and lower surfaces of the first and second foam boards, respectively, and the mass ratio of the amount of the roll glue to the water is 2: 1.
6. the method for preparing the composite board as claimed in claim 3, wherein the grammage of the first glass fiber mat and the second glass fiber mat is 100-150 g/m independently2The pressure maintaining molding is carried out for 35-45 seconds at the mold temperature of 135-145 ℃ and the mold pressing pressure of 9-11 MPa, and the cooling, adsorption and shaping are carried out for 35-45 seconds in a vacuum adsorption mechanism.
7. An automobile ceiling, characterized in that it is produced using the composite sheet material according to claim 1 or 2.
8. An automobile, characterized in that the automobile has the automobile ceiling of claim 7.
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|---|---|---|---|---|
| EP0238472A3 (en) * | 1986-02-24 | 1988-10-19 | Monsanto Company | Thermoformable laminate structure |
| CN101332791A (en) * | 2008-06-23 | 2008-12-31 | 刘明春 | Production method of vehicle top using wet treatment |
| CN101337434A (en) * | 2008-06-23 | 2009-01-07 | 刘明春 | Production method of automobile skylight sun-shield |
| CN102399524A (en) * | 2010-09-11 | 2012-04-04 | 烟台彤祥化工科技有限公司 | Special glue for car wet ceiling |
| CN103481751A (en) * | 2013-08-22 | 2014-01-01 | 烟台正海汽车内饰件有限公司 | High-strength PU (polyurethane) skylight pulling plate with sandwich structure and preparation method thereof |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0238472A3 (en) * | 1986-02-24 | 1988-10-19 | Monsanto Company | Thermoformable laminate structure |
| CN101332791A (en) * | 2008-06-23 | 2008-12-31 | 刘明春 | Production method of vehicle top using wet treatment |
| CN101337434A (en) * | 2008-06-23 | 2009-01-07 | 刘明春 | Production method of automobile skylight sun-shield |
| CN102399524A (en) * | 2010-09-11 | 2012-04-04 | 烟台彤祥化工科技有限公司 | Special glue for car wet ceiling |
| CN103481751A (en) * | 2013-08-22 | 2014-01-01 | 烟台正海汽车内饰件有限公司 | High-strength PU (polyurethane) skylight pulling plate with sandwich structure and preparation method thereof |
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