CN104085138A - Composite board as well as preparation method and application thereof - Google Patents
Composite board as well as preparation method and application thereof Download PDFInfo
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- CN104085138A CN104085138A CN201410307227.0A CN201410307227A CN104085138A CN 104085138 A CN104085138 A CN 104085138A CN 201410307227 A CN201410307227 A CN 201410307227A CN 104085138 A CN104085138 A CN 104085138A
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Abstract
The invention discloses a composite board as well as a preparation method and application thereof. The composite board comprises a first non-woven fabric layer, a first glass fiber felt layer, a first foam plate layer, a second non-woven fabric layer, a second foam plate layer, a second glass fiber felt layer and a knitting material layer, wherein the first glass fiber felt layer is arranged on the upper surface of the first non-woven fabric layer, the first foam plate layer is arranged on the upper surface of the first glass fiber felt layer, the second non-woven fabric layer is arranged on the upper surface of the first foam plate layer, the second foam plate layer is arranged on the upper surface of the second non-woven fabric layer, the second glass fiber felt layer is arranged on the upper surface of the second foam plate layer, and the knitting material layer is arranged on the upper surface of the second glass fiber felt layer. The composite board provided by the invention has the advantages of high intensity, high temperature resistance and sound absorption and sound insulation.
Description
Technical field
The invention belongs to materials processing technology field, particularly, the present invention relates to a kind of composite board and its preparation method and application.
Background technology
Roof of the vehicle is mainly divided into two kinds of moulding process, is respectively wet therapy forming process and dry process for forming; Wet therapy forming process is divided into again Wet One-step moulding process and wet method two-step method moulding process, above-mentioned moulding process is introduced below:
(1) dry process for forming, be called again the cold mould moulding process of heat material, raw material are mainly divided into two large divisions and form, be respectively PU composite plate and compound knitted fabric, its technical process is: through heating, (baking oven suggestion design temperature is 240～280 ℃ to PU composite plate, after heated baking, materials statement surface temperature is (190 ± 10) ℃), (requiring dwell pressure is (9 ± 1) Mpa in advance the PU composite plate after compound knitted fabric tensioning and after heated baking to be carried out to compression molding, dwell time is (60 ± 5) s, mold temperature≤30 ℃), complete half-finished making, by the bondd making of finished product of water cutter cutting and rear operation annex.Yet, dry-press process ceiling bonding is used PE glued membrane bonding, cause product resistance to elevated temperatures poor, dry process for forming ceiling is difficult to moulding for the larger position of local elongation simultaneously, and profile is too round and smooth, assembling is prone to matching problem, affect complete vehicle quality, in addition, because sound absorption qualities in product is fixed against cystosepiment in base material, and it is only to there being advantage in certain sound-absorbing wave band, cause product sound absorption qualities to be limited to.
(2) Wet One-step moulding process, be called again cold burden hot-die moulding process, raw material are mainly comprised of 5 layers of structure, structure is mainly compound knitted fabric, Chopped Strand Mat, cystosepiment, Chopped Strand Mat and bottom nonwoven formation from top to bottom, and its technical process is: after two-sided roller glue water spray, (roller glue amount summation is generally 100g/m to cystosepiment
2roller glue and water spray ratio are 2:1) by delivering to after other materials stack, in die cavity, carry out mold pressing (requiring mold temperature is (130 ± 10) ℃, die pressure is (10 ± 1) MPa, dwell time is (40 ± 5) s), after mold pressing completes, vacuumize cooling and shaping (shaping time is (40 ± 5) s), cooling and shaping completes by water cutter cutting and the rear operation annex finished product that bondd.Yet, make one step processing technique in wet therapy forming process and be limited to product strength impact, generally take upper strata glue amount few, lower floor's glue amount is many, and there is bad order problem in little position, gap, and product cannot be reprocessed.
(3) wet method two-step method moulding process, be called again cold burden hot-die moulding process, raw material are mainly comprised of 6 layers of structure, structure is mainly compound knitted fabric, upper strata nonwoven, Chopped Strand Mat, cystosepiment, Chopped Strand Mat and bottom nonwoven formation from top to bottom, and its technical process is: after two-sided roller glue water spray, (roller glue amount summation is generally 100g/m to cystosepiment
2roller glue and water spray ratio are 2:1) by delivering to after material stack (being cystosepiment, Chopped Strand Mat and bottom nonwoven after upper strata nonwoven, Chopped Strand Mat, roller glue from top to bottom), in die cavity, carry out mold pressing (requiring mold temperature is (140 ± 10) ℃, die pressure is (11 ± 1) MPa, dwell time is (40 ± 5) s), after mold pressing completes, vacuumize cooling and shaping (shaping time is (40 ± 5) s), after cooling and shaping, complete the making of semi-finished product skeleton; After the glue spraying of skeleton upper strata, (requiring mold temperature is (100 ± 10) ℃ to carry out pressurize bonding with the fabric that shifts to an earlier date tensioning, dwell pressure is (7 ± 1) MPa, dwell time is (35 ± 5) s), pressurize completes by vacuumizing cooling and shaping (shaping time is (30 ± 5) s) and completes half-finished making, by the finished product making that bond of water cutter cutting and rear operation annex.Yet, wet method two-step method moulding process glue is polyurethane thermosetting glue, needing to absorb humidity reaction in air bonds, higher to environmental requirement, easily because volatilizing, solvent do not cause the large area problem of coming unglued completely, product strength is inhomogeneous simultaneously, there is IPTV risk: ceiling all exists border attenuate (being beneficial to assembling and air bag explosion), dry method and wet processing ceiling border are because cystosepiment compression goes beyond the limit of, cause internal structure to be destroyed, ceiling strength decreased, causes existing ceiling after sale to deviate from adhesive tape risk.
Therefore, existing roof of the vehicle moulding process needs further to be studied.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique.For this reason, one object of the present invention is to propose a kind of composite board and its preparation method and application, and this composite board has higher intensity, high temperature resistant and sound-absorbing sound insulation value.
In one aspect of the invention, the present invention proposes a kind of composite board, comprising:
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.
According to the composite board of the embodiment of the present invention, there is higher intensity, high temperature resistant and sound-absorbing sound insulation value.
In addition, composite board according to the above embodiment of the present invention can also have following additional technical characterictic:
In some embodiments of the invention, described the first nonwoven layer is selected from spunlace non-woven cloth or film nonwoven, and described the second nonwoven layer is spunlace non-woven cloth.
In some embodiments of the invention, the density of described the first foam flaggy is 30～35kg/m
3, the density of described the second foam flaggy is 20～25kg/m
3.Thus, can significantly improve the sound-absorbing sound insulation value of composite board.
In some embodiments of the invention, the thickness of described the first foam flaggy and described the second foam flaggy is 3.5 millimeters respectively independently.Thus, can further improve the sound-absorbing sound insulation value of composite board.
In another aspect of the present invention, the present invention proposes a kind of method of preparing above-mentioned composite board, comprising:
(1) successively the first nonwoven, the first Chopped Strand Mat, the first cystosepiment, the second nonwoven, the second cystosepiment, the second Chopped Strand Mat and knitting material are superposeed, to obtain multi-layer sheet;
(2) described multi-layer sheet step (1) being obtained carries out pressurize moulding in die cavity, to obtain semi-finished product; And
(3) the described semi-finished product that step (2) obtained carry out cooling absorption sizing, to obtain described composite board.
According to the method for preparing composite board of the embodiment of the present invention, can effectively prepare the above-mentioned composite board with higher intensity, high temperature resistant and sound-absorbing sound insulation value.
In addition, the method for preparing composite board according to the above embodiment of the present invention can also have following additional technical characterictic:
In some embodiments of the invention, the described method of preparing composite board further comprises: before successively described the first nonwoven, described the first Chopped Strand Mat, described the first cystosepiment, described the second nonwoven, described the second cystosepiment, described the second Chopped Strand Mat and described knitting material being superposeed, in advance by the upper surface of described the first cystosepiment and described the second cystosepiment and lower surface difference polyurethane coating thermosetting glue, wherein, described the first cystosepiment and described the second cystosepiment upper surface roller glue amount are 15～25g/m
2, described the first cystosepiment and described the second cystosepiment lower surface roller glue amount are 35～45g/m
2.Thus, can significantly improve the resistance to elevated temperatures of composite board.
In some embodiments of the invention, after by the upper surface of described the first cystosepiment and described the second cystosepiment and lower surface difference polyurethane coating thermosetting glue, to described the first cystosepiment and described the second cystosepiment upper surface and lower surface water spray, the mass ratio of described roller glue amount and water is 2:1.Thus, can significantly reduce the dependence of composite board to environment.
In some embodiments of the invention, described the first Chopped Strand Mat and described the second Chopped Strand Mat grammes per square metre are respectively 100～150g/m independently
2, described pressurize moulding is to be that 135～145 degrees Celsius, mold pressing are under 9～11MPa, to carry out 35～45 seconds in mold temperature, described cooling adsorption forming is in vacuum adsorption mechanism, to carry out 35～45 seconds.Thus, can further improve the intensity of composite board, high temperature resistant and sound-absorbing sound insulation value.
Aspect the 3rd of the present invention, the present invention proposes a kind of roof of the vehicle, this roof of the vehicle is prepared by composite board described above.Thus, this roof of the vehicle has higher intensity, high temperature resistant and sound-absorbing sound insulation value.
Aspect the 4th of the present invention, the present invention proposes a kind of automobile, this automobile has roof of the vehicle described above.Because this automobile has used above-mentioned roof of the vehicle, can effectively play deadening, and then avoid car body top cover external noise to reach interior.
Accompanying drawing explanation
Fig. 1 is plywood sheet structure schematic diagram according to an embodiment of the invention;
Fig. 2 is the method flow schematic diagram of preparing according to an embodiment of the invention composite board.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of indications such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, at least one this feature can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is at least two, for example two, and three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless separately there is clear and definite restriction.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In one aspect of the invention, the present invention proposes a kind of composite board.Below with reference to Fig. 1, the composite board of the embodiment of the present invention is described in detail.According to embodiments of the invention, this composite board comprises: the first nonwoven layer 100, the first glass carpet veneer 200, the first foam flaggy 300, the second nonwoven layer 400, the second foam flaggy 500, the second glass carpet veneer 600 and the knitting bed of material 700.According to embodiments of the invention, the first glass carpet veneer 200 is arranged at the upper surface of the first nonwoven layer 100, the first foam flaggy 300 is arranged at the upper surface of the first glass carpet veneer 200, the second nonwoven layer 400 is arranged at the upper surface of the first foam flaggy 300, the second foam flaggy 500 is arranged at the upper surface of the second nonwoven layer 400, the second glass carpet veneer 600 is arranged at the upper surface of the second foam flaggy 500, and the knitting bed of material 700 is arranged at the upper surface of the second glass carpet veneer 600.
According to embodiments of the invention, the first nonwoven layer is selected from spunlace non-woven cloth or film nonwoven, and the second nonwoven layer is spunlace non-woven cloth.According to embodiments of the invention, the grammes per square metre of the first glass carpet veneer and the second glass carpet veneer can be 100～150g/m independently
2.Inventor finds, selects the Chopped Strand Mat of this scope can significantly improve the intensity of composite board.
According to embodiments of the invention, the density of the first foam flaggy can be 30～35kg/m
3, the density of the second foam flaggy can be 20～25kg/m
3.Inventor finds, by use the two-ply foam plate of different densities in composite board, can effectively play the effect of sound-absorbing sound insulation, and a large amount of screening discoveries of inventor's process, the cystosepiment of selection density range of the present invention combines sound-absorbing sound insulation value the best of resulting composite board.
According to embodiments of the invention, the thickness of the first foam flaggy and the second foam flaggy is also not particularly limited, and according to a particular embodiment of the invention, the thickness of the first foam flaggy and the second foam flaggy can be 3.5 millimeters respectively independently.Inventor's discovery, the cystosepiment of this thickness makes the sound-absorbing sound insulation value of composite board best.According to embodiments of the invention, the thickness of cystosepiment can be selected according to actual needs.Thus, can significantly improve the intensity of composite board, high temperature resistant and sound-absorbing sound insulation value.
In another aspect of the present invention, the present invention proposes a kind of method of preparing above-mentioned composite board.Below with reference to Fig. 2, the method for preparing composite board of the embodiment of the present invention is described in detail.According to embodiments of the invention, the method comprises:
S100: stack
According to embodiments of the invention, successively the first nonwoven, the first Chopped Strand Mat, the first cystosepiment, the second nonwoven, the second cystosepiment, the second Chopped Strand Mat and knitting material are superposeed, thereby can obtain multi-layer sheet.According to embodiments of the invention, the particular type of the first nonwoven and the second nonwoven is also not particularly limited, according to a particular embodiment of the invention, the first nonwoven layer can be selected from spunlace non-woven cloth or film nonwoven, and the second nonwoven layer can be spunlace non-woven cloth.According to embodiments of the invention, the particular type of the first Chopped Strand Mat and the second Chopped Strand Mat is also not particularly limited, and according to a particular embodiment of the invention, the grammes per square metre of the first Chopped Strand Mat and the second Chopped Strand Mat can be 100～150g/m independently
2.Inventor finds, selects the Chopped Strand Mat of this scope can significantly improve the intensity of composite board.According to embodiments of the invention, the density of the first cystosepiment and the second cystosepiment is also not particularly limited, and according to a particular embodiment of the invention, the density of the first cystosepiment can be 30～35kg/m
3, the density of the second cystosepiment can be 20～25kg/m
3.Inventor finds, by use the two-ply foam plate of different densities in composite board, can effectively play the effect of sound-absorbing sound insulation, and a large amount of screening discoveries of inventor's process, the cystosepiment of selection density range of the present invention combines sound-absorbing sound insulation value the best of resulting composite board.According to embodiments of the invention, the thickness of the first foam flaggy and the second foam flaggy is also not particularly limited, and according to a particular embodiment of the invention, the thickness of the first foam flaggy and the second foam flaggy can be 3.5 millimeters respectively independently.Inventor's discovery, the cystosepiment of this thickness makes the sound-absorbing sound insulation value of composite board best.According to embodiments of the invention, the thickness of cystosepiment can be selected according to actual needs.Thus, can significantly improve the intensity of composite board, high temperature resistant and sound-absorbing sound insulation value.
According to embodiments of the invention, before successively the first nonwoven, the first Chopped Strand Mat, the first cystosepiment, the second nonwoven, the second cystosepiment, the second Chopped Strand Mat and knitting material being superposeed, in advance by the upper surface of the first cystosepiment and the second cystosepiment and lower surface difference polyurethane coating thermosetting glue.Inventor finds, in this process, adopt polyurethane thermosetting glue, with respect to wet method two-step method moulding process, can effectively avoid, due to the solvent large area that causes the completely problem of coming unglued of not volatilizing, with respect to dry process for forming, can significantly improving the resistance to elevated temperatures of composite board simultaneously.
In this step, can the first nonwoven, the first Chopped Strand Mat, the first cystosepiment, the second nonwoven, the second cystosepiment, the second Chopped Strand Mat and knitting material be superposeed according to following method: first nonwoven and Chopped Strand Mat are carried out to cutting, obtain the first nonwoven, the second nonwoven, the first Chopped Strand Mat and the second Chopped Strand Mat; Then the upper and lower surface of the first cystosepiment and the second cystosepiment is carried out to roller glue, wherein, the first cystosepiment and the second cystosepiment upper surface roller glue amount can be 15～25g/m
2, the first cystosepiment and the second cystosepiment lower surface roller glue amount can be 35～45g/m
2, and after by the first cystosepiment and the second cystosepiment upper and lower surface roller glue, to the first cystosepiment and the second cystosepiment upper and lower surface water spray, wherein, the mass ratio of roller glue amount and water can be 2:1; Then the first nonwoven cutting and the first Chopped Strand Mat superposeed and adhere to the lower surface of the first cystosepiment, wherein, the lower surface of the first cystosepiment contacts with the first Chopped Strand Mat upper surface; Then the second nonwoven is adhered to the upper surface of the first cystosepiment, the second cystosepiment lower surface is contacted with the second nonwoven upper surface; Finally the second Chopped Strand Mat and knitting material superposeed and adhere to the upper surface of the second cystosepiment, wherein the lower surface of the second Chopped Strand Mat contacts with the upper surface of the second cystosepiment, thereby can obtain multi-layer sheet.
S200: pressurize moulding
According to embodiments of the invention, multi-layer sheet obtained above is carried out in die cavity to pressurize moulding, thereby can obtain semi-finished product.According to embodiments of the invention, the condition of pressurize moulding is also not particularly limited, and according to a particular embodiment of the invention, pressurize moulding can be that 135～145 degrees Celsius, mold pressing are under 9～11MPa, to carry out completing for 35～45 seconds in mold temperature.In this step, particularly, under hot conditions, the isocyanates in polyurethane glue is met water generation chemical reaction, Heat of Formation thermoset material urea and atmospheric carbon dioxide, thus can obtain semi-finished product.
S300: cooling absorption sizing
According to embodiments of the invention, the semi-finished product that obtain are above carried out to cooling absorption sizing, thereby can obtain composite board.According to embodiments of the invention, the condition of cooling forming is also not particularly limited, and according to a particular embodiment of the invention, cooling adsorption forming can carry out 35～45 seconds in vacuum adsorption mechanism.Inventor finds, if the semi-finished product temperature-fall period obtaining through above-mentioned pressurize moulding is slow, thoroughly slaking after easily making glue react, cause product strength lower, easily deform, and can be under the prerequisite that guarantees profile with prestissimo, make product slaking (temperature moment be down to normal temperature from high temperature) by cooling absorption sizing, finally reach desirable strength.
As mentioned above, according to the method for preparing composite board of the embodiment of the present invention, can have and be selected from following advantage one of at least:
The composite board obtaining according to the method for preparing composite board of the embodiment of the present invention has higher resistance to elevated temperatures, and by using polyurethane thermosetting glue, can primary first-order equation no longer reacts after completely;
The composite board processability obtaining according to the method for preparing composite board of the embodiment of the present invention is good, adopts wet therapy forming process, and cold burden hot-die moulding process, can guarantee the processability that product is good;
The composite board sound absorption qualities obtaining according to the method for preparing composite board of the embodiment of the present invention is good, for avoiding causing product sound absorption qualities poor because of cystosepiment self reason, use two-ply foam plate different densities, sound absorption qualities for different foam plate at different-waveband, cystosepiment is combined, guarantee the good sound absorption qualities of product;
The appearance qualities such as the composite board qualification rate obtaining according to the method for preparing composite board of the embodiment of the present invention is high, uses two-ply foam plate group technology, and glue amount is divided into four parts and is distributed in base material, product seep through are eliminated;
The composite board intensity that obtains according to the method for preparing composite board of the embodiment of the present invention is high/and IPTV risk is low, can fundamentally stop border lamination problem, and in glue uniform filling cystosepiment, product boundary intensity improves, and avoids occurring IPTV risk;
The composite board obtaining according to the method for preparing composite board of the embodiment of the present invention is subject to extraneous factor low with respect to wet therapy forming process moulding, after to cystosepiment roller glue, sprays water again, can significantly reduce the dependence to environment;
The composite board that root obtains according to the method for preparing composite board of the embodiment of the present invention has effective sound insulation value, and in base material, cystosepiment is sound-absorbing material, and the middle nonwoven gluing that increases, has effectively played deadening.
Aspect the 3rd of the present invention, the present invention proposes a kind of roof of the vehicle.According to embodiments of the invention, this roof of the vehicle adopts above-mentioned composite board to prepare.According to embodiments of the invention, to composite board obtained above, make as required water cutter cut, and according to requiring its product local location to carry out flange and the work of cushion block buckle bonding, thereby can obtain roof of the vehicle.Thus, can be so that roof of the vehicle has higher intensity, high temperature resistant and sound-absorbing sound insulation value.
Aspect the 4th of the present invention, the present invention proposes a kind of automobile, this automobile has above-mentioned roof of the vehicle.Because this automobile has used above-mentioned roof of the vehicle, can effectively play deadening, and then avoid car body top cover external noise to reach interior.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, the specific features of description, structure, material or feature can one or more embodiment in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this description or example and different embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (10)
1. a composite board, is characterized in that, comprising:
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.
2. composite board according to claim 1, is characterized in that, described the first nonwoven layer is selected from spunlace non-woven cloth or film nonwoven, and described the second nonwoven layer is spunlace non-woven cloth.
3. composite board according to claim 1, is characterized in that, the density of described the first foam flaggy is 30～35kg/m
3, the density of described the second foam flaggy is 20～25kg/m
3.
4. composite board according to claim 3, is characterized in that, the thickness of described the first foam flaggy and described the second foam flaggy is 3.5 millimeters respectively independently.
5. a method of preparing composite board described in claim 1-4 any one, is characterized in that, comprising:
(1) successively the first nonwoven, the first Chopped Strand Mat, the first cystosepiment, the second nonwoven, the second cystosepiment, the second Chopped Strand Mat and knitting material are superposeed, to obtain multi-layer sheet;
(2) described multi-layer sheet step (1) being obtained carries out pressurize moulding in die cavity, to obtain semi-finished product; And
(3) the described semi-finished product that step (2) obtained carry out cooling absorption sizing, to obtain described composite board.
6. the method for preparing composite board according to claim 5, it is characterized in that, further comprise: before successively described the first nonwoven, described the first Chopped Strand Mat, described the first cystosepiment, described the second nonwoven, described the second cystosepiment, described the second Chopped Strand Mat and described knitting material being superposeed, in advance by the upper surface of described the first cystosepiment and described the second cystosepiment and lower surface difference polyurethane coating thermosetting glue, wherein, described the first cystosepiment and described the second cystosepiment upper surface roller glue amount are 15～25g/m
2, described the first cystosepiment and described the second cystosepiment lower surface roller glue amount are 35～45g/m
2.
7. the method for preparing composite board according to claim 6, it is characterized in that, after by the upper surface of described the first cystosepiment and described the second cystosepiment and lower surface difference polyurethane coating thermosetting glue, to described the first cystosepiment and described the second cystosepiment upper surface and lower surface water spray, the mass ratio of described roller glue amount and water is 2:1.
8. the method for preparing composite board according to claim 5, is characterized in that, described the first Chopped Strand Mat and described the second Chopped Strand Mat grammes per square metre are respectively 100～150g/m independently
2, described pressurize moulding is to be that 135～145 degrees Celsius, mold pressing are under 9～11MPa, to carry out 35～45 seconds in mold temperature, described cooling adsorption forming is in vacuum adsorption mechanism, to carry out 35～45 seconds.
9. a roof of the vehicle, is characterized in that, described roof of the vehicle is prepared by the compound plywood material described in employing claim 1～4 any one.
10. an automobile, is characterized in that, described automobile has roof of the vehicle claimed in claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020211177A1 (en) * | 2019-04-17 | 2020-10-22 | 格林莱特实业（苏州）有限公司 | Polyurethane acoustic panel for automobile parts |
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| CN104085138B (en) | 2016-05-11 |
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