CN215704645U - High-strength polyurethane composite board - Google Patents
High-strength polyurethane composite board Download PDFInfo
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- CN215704645U CN215704645U CN202121870764.8U CN202121870764U CN215704645U CN 215704645 U CN215704645 U CN 215704645U CN 202121870764 U CN202121870764 U CN 202121870764U CN 215704645 U CN215704645 U CN 215704645U
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Abstract
The utility model relates to a high-strength polyurethane composite board, which mainly solves the problems that the polyurethane composite board in the prior art has low bending strength and is easy to bend and deform after being baked. The high-strength polyurethane composite board comprises a non-woven fabric layer (1), a first polypropylene polymer film layer (2), a polypropylene powder layer (3), a first glass fiber layer (4), a polyurethane foam layer (5), a second polypropylene polymer film layer (6), a second glass fiber layer (7), a polyethylene powder layer (8) and a polyethylene polymer film layer (9) from top to bottom in sequence; wherein the density of the polyurethane foam layer is 60-70 kg/m3The technical scheme that the bending strength is 160-185 Kpa and the compression strength is 300-350 Kpa better solves the problem and can be used in the industrial production of polyurethane composite boards.
Description
Technical Field
The utility model relates to the field of polyurethane, in particular to a high-strength polyurethane composite board.
Background
With the development of the automobile industry, the performance requirements on the polyurethane composite board for the automobile interior are higher and higher, and particularly, the development of the composite board for the polyurethane automobile interior is influenced by the defects of insufficient rigidity and easiness in bending of the polyurethane composite board used in the automobile trunk cover plate; in general, the stiffness index is represented by a bending strength and a deformation amount, and the greater the bending strength, the greater the stiffness, and the smaller the deformation amount, the greater the stiffness.
In order to meet the requirement of light weight of automobiles and to embody the cost advantage, the density of PU polyurethane foam is controlled to be 50-60 kg/m under the normal condition3However, the composite board has a soft skeleton and insufficient bearing capacity, and when the composite board is softened at a temperature of 200 ℃, the composite board is easy to have obvious curling deformation, and subsequent composite production cannot be performed.
Chinese patent CN201721148529.3 discloses a local high-strength polyurethane composite board, which comprises eight layers of materials, from top to bottom: the glass fiber reinforced plastic composite material comprises a polymer film, a first glass fiber layer, a first adhesive powder layer, a polyurethane board, a local area glass fiber layer, a second adhesive powder layer, a second glass fiber layer and a non-woven fabric layer; the glass fiber layer in the local area consists of a polymer film and a glass fiber layer, the thickness of the glass fiber layer is 200-800 mu m, and the glass fiber layer is selected from glass fiber cloth, glass fiber felt or glass fiber; by adopting the local reinforced glass fiber layer, the strength of the composite board reaches the required range, the gram weight is reduced, the defects of local tearing and wrinkle reduction are overcome, and the strength of the composite board needs to be further improved to meet the higher and higher rigidity requirement.
Chinese patent CN212708335U discloses a polyurethane composite board with high bending strength, which sequentially comprises a first layer of non-woven fabric, a first layer of polymer film, a first layer of glass fiber, a first layer of polyethylene powder, a glass fiber felt, a second layer of polymer film, polyurethane foam, a third layer of polymer film, a second layer of glass fiber, a second layer of polyethylene powder and a polyethylene film from top to bottom, wherein the glass fiber felt consists of glass fiber and polyethylene powder; through the mode of compound glass fiber felt of distributing type paste, strengthened the bending strength of polyurethane composite board for polyurethane composite board has certain bending strength and is difficult for tearing, but in order to satisfy higher and higher rigidity requirement, its bending strength still need further improve, and it does not relate to the deflection index condition.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that in the prior art, a polyurethane composite board is low in bending strength and easy to bend and deform after being baked, and provides a high-strength polyurethane composite board which has the advantages of being high in bending strength and small in deformation.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a high-strength polyurethane composite board comprises a non-woven fabric layer 1, a first polypropylene high polymer film layer 2, a polypropylene powder layer 3, a first glass fiber layer 4, a polyurethane foam layer 5, a second polypropylene high polymer film layer 6, a second glass fiber layer 7, a polyethylene powder layer 8 and a polyethylene high polymer film layer 9 from top to bottom in sequence; wherein the density of the polyurethane foam layer is 60-70 kg/m3The bending strength is 160 to 185Kpa, and the compression strength is 300 to 350 Kpa.
In the above technical solution, preferably, the non-woven fabric layer 1 is selected from one of a spunlace non-woven fabric, a hot-rolled non-woven fabric, a spunbond non-woven fabric or a melt-blown non-woven fabric, and the thickness of the non-woven fabric layer 1 is 0.1-0.5 mm.
In the above technical scheme, preferably, the thickness of the first polypropylene polymer film layer 2 and the second polypropylene polymer film layer 6 is 55-70 μm, the longitudinal tensile strength is greater than or equal to 35N/50mm, and the transverse tensile strength is greater than or equal to 7N/50 mm.
In the above technical solution, preferably, the thickness of the polypropylene powder layer 3 is 80 to 150 μm.
In the above technical solution, preferably, the thickness of the first glass fiber layer 4 and the second glass fiber layer 7 is 250 to 280 μm, and the monofilament diameter of the glass fiber is 5 to 10 μm.
In the above technical solution, preferably, the thickness of the polyethylene powder layer 8 is 100 to 150 μm; the thickness of the polyethylene polymer film layer 9 is 36-44 mu m, and the gram weight is 36-44 g/m2。
In the above technical solution, preferably, the thickness of the polyurethane foam layer 5 is 3-10 mm.
In the above technical solution, preferably, the preparation method of the polyurethane foam layer 5 includes the following steps:
(1) preparing raw materials according to the following components in parts by weight:
the weight part ratio of the component A to the component B is 100: 180-220, wherein the component A comprises the following components in parts by weight: 15-30 parts of polyether polyol I, 50-70 parts of polyether polyol II, 2-10 parts of a pore-forming agent, 5-10 parts of a polyol, 0.8-2 parts of a reaction type catalyst, 1-2 parts of a surfactant, 2-3 parts of water and 0.3-1 part of glass fiber powder; the component B is polymeric MDI; the polyether polyol I is prepared by copolymerizing ethylene oxide and propylene oxide by using at least one of glycerol, trimethylolpropane or sorbitol as an initiator, wherein the average molecular weight of the polyether polyol I is 4000-12000, and the primary hydroxyl content of the polyether polyol I is 70-90%; the polyether polyol II is polyether polyol which is prepared by taking at least one of diethylene glycol, glycerol, pentaerythritol, ethylenediamine, sucrose or sorbitol as an initiator and carrying out block polymerization on propylene oxide, and has the average molecular weight of 300-1000 and the hydroxyl value of 200-800 mgKOH/g; the pore former is selected from polyether type pore formers which have a hydroxyl value of 25-35 mgKOH/g and are copolymerized by propylene oxide and ethylene oxide; the polymeric polyol is an ether-bond polymeric polyol which is prepared by dehydrating and condensing intermolecular hydroxyl groups of at least two small molecular polyols, the polymerization degree of the polymeric polyol is 2-10, and the hydroxyl value is 800-2000 mgKOH/g; the reaction type catalyst is a tertiary amine type catalyst containing hydroxyl; the surfactant is polysiloxane-oxyalkylene block copolymer;
(2) preparation of component A:
sequentially adding polyether polyol I, polyether polyol II, a pore-forming agent, polyol, a reaction type catalyst, a surfactant, water and glass fiber powder into a container A according to the components in the step (1) in parts by weight, and uniformly stirring at the temperature of 20-25 ℃ to obtain a mixed material I;
(3) preparation of component B:
adding polymeric MDI into a container B according to the components and the parts by weight in the step (1), and uniformly stirring at the temperature of 20-25 ℃;
(4) the component A and the component B are mixed according to the weight part ratio of 100: 180-220, quickly injecting the mixture into a tool mold prepared in advance after the mixture is quickly mixed and uniformly stirred, curing for 2-3 days after the free rise is finished to prepare polyurethane foam, and slicing to obtain a polyurethane foam layer.
In the above technical solution, preferably, the small molecule polyol is glycerol; the polyether polyol I is at least one selected from CHE-2801, CHE-330N, CHE-360N, CHE-822P or CHE-628; the polyether polyol II is selected from at least one of CHE-303, CHE-306, N-405 or ZS-4110; the polyether type cell opener is selected from at least one of CHK-350D, CP1421 or AK-9901; the surfactant is selected from at least one of B8444, B8547, B8534, B8460, B8409, AK-7703, L-580 or L-5345; the polymeric MDI is selected from at least one of S5005, M20S, PM-100 or PM-200; the tertiary amine catalyst is selected from at least one of an foaming tertiary amine catalyst, an equilibrium tertiary amine catalyst or a delayed tertiary amine catalyst; the glass fiber powder is at least one of MG-170, MG-200, MG-230, MG-250 or MG-280.
The high-strength polyurethane composite board provided by the utility model integrates the synergistic cooperation of the polypropylene powder, the polypropylene polymer film, the polyethylene powder and the polyethylene polymer film by adjusting the hierarchical structure of the polyurethane composite board, and is prepared by selecting the polyurethane foam layer, the density of the polyurethane foam layer can reach 70kg/m3The bending strength can reach 182Kpa, the bending strength of the polyurethane composite board is integrally improved, the bending deformation of the baked composite board is reduced, the bending strength of the obtained polyurethane composite board reaches 23.1Kpa, the bending strength is up to 39.59N, the bending deformation after the polyurethane composite board is baked at a high temperature of 200 ℃ is as low as 3.2mm, and the polyurethane composite board has the advantages of high bending strength and small deformation and achieves good technical effects.
Drawings
FIG. 1 is a schematic structural diagram of a high-strength polyurethane composite board.
In the attached drawing 1, 1 is a non-woven fabric layer, 2 is a first polypropylene polymer film layer, 3 is a polypropylene powder layer, 4 is a first glass fiber layer, 5 is a polyurethane foam layer, 6 is a second polypropylene polymer film layer, 7 is a second glass fiber layer, 8 is a polyethylene powder layer, and 9 is a polyethylene polymer film layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
[ example 1 ]
A high-strength polyurethane composite board sequentially comprises a non-woven fabric layer 1 (hot-rolled non-woven fabric, the thickness of which is 0.3mm), a first polypropylene high-polymer film layer 2 (the thickness of which is 58 mu m, the longitudinal tensile strength of which is 39N/50mm and the transverse tensile strength of which is 10N/50mm), a polypropylene powder layer 3 (the thickness of which is 85 mu m) and a first glass fiber layer 4 (glass fiber layer)Glass fiber having a filament diameter of 6 μm and a thickness of 255 μm), and a polyurethane foam layer 5 (thickness of 6mm, density of 65 kg/m)3Bending strength 175Kpa, compression strength 309Kpa), second polypropylene polymer film layer 6 (thickness 58 μm, longitudinal tensile strength 39N/50mm, transverse tensile strength 10N/50mm), second glass fiber layer 7 (filament diameter of glass fiber 6 μm, thickness 255 μm), polyethylene powder layer 8 (thickness 120 μm), and polyethylene polymer film layer 9 (thickness 38 μm, grammage 40 g/m)2) (ii) a The above 9 layers of materials were heated and pressed in an oven at 200 ℃ to obtain high strength polyurethane composite boards, the performance data of which are shown in table 2.
The preparation method of the polyurethane foam layer 5 comprises the following steps:
(1) preparing the following raw materials in parts by weight:
and (2) component A: 100 parts, specifically 30 parts of CHE-822P, 55 parts of CHE-303, 4.5 parts of CP-1421, 5 parts of hexaglycerol, 0.2 part of LE-15, 0.8 part of PC17, 0.4 part of L-5345, 0.6 part of B8409, 3 parts of water and 0.5 part of MG-280;
and (B) component: 180 parts, specifically 100 parts of M20S and 80 parts of PM-100
(2) Preparation of component A:
according to the weight parts in the step (1), adding CHE-822P, CHE-303, CP-1421, hexaglycerol, LE-15, PC17, L-5345, B8409, water and MG-280 into a container A, and uniformly stirring at the temperature of 23 ℃ to obtain a mixed material I;
(3) preparation of component B:
adding M20S and PM-100 into a container B according to the parts by weight in the step (1), and uniformly stirring at the temperature of 23 ℃; (4) and (3) quickly mixing and uniformly stirring the component A and the component B, quickly injecting the mixture into a tool mold prepared in advance, curing the mixture for 3 days after the free rise is finished, and slicing the mixture to obtain a polyurethane foam layer, wherein the performance data of the polyurethane foam layer is shown in Table 1.
[ example 2 ]
A high-strength polyurethane composite board comprises a non-woven fabric layer 1 (spunlace non-woven fabric with a thickness of 0.4mm), a first polypropylene high-molecular film layer 2 (with a thickness of 60 mu m, a longitudinal tensile strength of 41N/50mm and a transverse tensile strength of 8N/50mm), a polypropylene powder layer 3 (with a thickness of 80 mu m), and first glass in sequence from top to bottomA fiber layer 4 (filament diameter of glass fiber 7 μm and thickness of 260 μm), a polyurethane foam layer 5 (thickness of 5mm, density of 70 kg/m)3Flexural Strength 182Kpa, compressive Strength 334Kpa), a second polypropylene polymer film layer 6 (thickness 60 μm, longitudinal tensile Strength 41N/50mm, transverse tensile Strength 8N/50mm), a second glass fiber layer 7 (filament diameter of glass fiber 7 μm, thickness 260 μm), a polyethylene powder layer 8 (thickness 110 μm), and a polyethylene polymer film layer 9 (thickness 41 μm, grammage 36 g/m)2) (ii) a The above 9 layers of materials were heated and pressed in an oven at 200 ℃ to obtain high strength polyurethane composite boards, the performance data of which are shown in table 2.
The preparation method of the polyurethane foam layer 5 comprises the following steps:
(1) preparing the following raw materials in parts by weight:
and (2) component A: 100 parts, specifically 23 parts of CHE-360N, 60 parts of N-405, 5 parts of AK-9901, 7 parts of octaglycerol, 0.3 part of ZF-10, 1.0 part of PC17, 1 part of L-5345, 2.1 parts of water and 0.6 part of MG-200;
and (B) component: 190 parts, specifically 70 parts of M20S and 120 parts of S5005
(2) Preparation of component A:
according to the weight parts in the step (1), adding CHE-360N, N-405, AK-9901, octaglycerol, ZF-10, PC17, L-5345, water and MG-200 into a container A in sequence, and uniformly stirring at the temperature of 23 ℃ to obtain a mixed material I;
(3) preparation of component B:
adding M20S and PM-100 into a container B according to the parts by weight in the step (1), and uniformly stirring at the temperature of 23 ℃; (4) and (3) quickly mixing and uniformly stirring the component A and the component B, quickly injecting the mixture into a tool mold prepared in advance, curing the mixture for 3 days after the free rise is finished, and slicing the mixture to obtain a polyurethane foam layer, wherein the performance data of the polyurethane foam layer is shown in Table 1.
[ COMPARATIVE EXAMPLE 1 ]
A polyurethane composite board comprises a non-woven fabric layer (thickness 0.5mm) and a first polyethylene film layer (thickness 50 μm, gram weight 50 g/m) from top to bottom in sequence2) A first glass fiber layer (monofilament diameter 3 μm, fiber length 25mm, thickness 400 μm), a first polyethylene powder layer (thickness 150 μm), a second polyethyleneEthylene film layer (thickness 30 μm, gram weight 30 g/m)2) A polyurethane foam layer (thickness 5mm, density 35 kg/m)3) A third polyethylene film layer (thickness 30 μm, gram weight 30 g/m)2) A second glass fibre layer (filament diameter 3 μm, fibre length 25mm, thickness 800 μm) and a fourth polyethylene film layer (grammage 30 g/m)2Thickness 40 μm); heating and pressing the 9 layers of materials by adopting an oven, wherein the preparation temperature is 200 ℃; the performance data of the prepared polyurethane composite board are shown in table 2.
[ COMPARATIVE EXAMPLE 2 ]
Referring to the hierarchical structure of the composite board of example 1 in chinese patent CN212708335U, the performance data of the prepared polyurethane composite board is shown in table 2.
TABLE 1 Performance data for polyurethane foams of examples 1-2 and comparative examples 1-2
TABLE 2 Performance data of the polyurethane composite sheets of examples 1 to 2 and comparative examples 1 to 2
Note: the method for testing the deformation in table 2 includes cutting the polyurethane composite board into sample strips of 10 × 10cm, baking the sample strips in a baking oven at 200 ℃ for 2 minutes, taking out the sample strips, cooling the sample strips to room temperature, flatly paving the sample strips on a table top, and measuring the height of the wavy wave crest of the flatly paved polyurethane composite board from the table top by using a measuring tape to obtain the deformation.
As can be seen from the data in table 2, the high-strength polyurethane composite boards provided by the present invention have the advantages of high bending strength of 23.1Kpa, high bending strength of 39.59N, higher deformation amount of 3.2mm, high bending strength and small deformation amount in examples 1-2, and can be used in the industrial production of polyurethane composite boards.
Claims (7)
1. A high-strength polyurethane composite board is characterized by sequentially comprising a non-woven fabric layer (1), a first polypropylene high polymer film layer (2), a polypropylene powder layer (3), a first glass fiber layer (4), a polyurethane foam layer (5), a second polypropylene high polymer film layer (6), a second glass fiber layer (7), a polyethylene powder layer (8) and a polyethylene high polymer film layer (9) from top to bottom; wherein the density of the polyurethane foam layer is 60-70 kg/m3The bending strength is 160 to 185Kpa, and the compression strength is 300 to 350 Kpa.
2. The high-strength polyurethane composite board as claimed in claim 1, wherein the non-woven fabric layer (1) is selected from one of spunlace non-woven fabric, hot-rolled non-woven fabric, spun-bonded non-woven fabric and melt-blown non-woven fabric, and the thickness of the non-woven fabric layer (1) is 0.1-0.5 mm.
3. The high-strength polyurethane composite board as claimed in claim 1, wherein the first polypropylene polymer film layer (2) and the second polypropylene polymer film layer (6) have a thickness of 55-70 μm, a longitudinal tensile strength of 35N/50mm or more, and a transverse tensile strength of 7N/50mm or more.
4. The high-strength polyurethane composite board as claimed in claim 1, wherein the polypropylene powder layer (3) has a thickness of 80-150 μm.
5. The high-strength polyurethane composite board as claimed in claim 1, wherein the first glass fiber layer (4) and the second glass fiber layer (7) have a thickness of 250 to 280 μm, and the filament diameter of the glass fiber is 5 to 10 μm.
6. The high-strength polyurethane composite board as claimed in claim 1, wherein the thickness of the polyethylene powder layer (8) is 100-150 μm; the thickness of the polyethylene polymer film layer (9) is 36-44 mu m, and the gram weight is 36-44 g/m2。
7. The high-strength polyurethane composite board as claimed in claim 1, wherein the thickness of the polyurethane foam layer (5) is 3-10 mm.
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| CN202121870764.8U CN215704645U (en) | 2021-08-11 | 2021-08-11 | High-strength polyurethane composite board |
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| CN202121870764.8U CN215704645U (en) | 2021-08-11 | 2021-08-11 | High-strength polyurethane composite board |
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Address after: 215600 - 1, No. 8, Changyang Road, Jingang street, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: Jiangsu saisheng New Material Technology Co.,Ltd. Address before: No. 18, Qinghai Road, Jiangsu Yangzi River International Chemical Park, Suzhou, Jiangsu 215600 Patentee before: ZHANGJIAGANG CHANGTAI AUTOMOTIVE TRIMS MATERIAL CO.,LTD. |
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