CN116872517A - Preparation method of skylight pulling plate - Google Patents
Preparation method of skylight pulling plate Download PDFInfo
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- CN116872517A CN116872517A CN202211278093.5A CN202211278093A CN116872517A CN 116872517 A CN116872517 A CN 116872517A CN 202211278093 A CN202211278093 A CN 202211278093A CN 116872517 A CN116872517 A CN 116872517A
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- pulling plate
- glass fiber
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- skylight
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000003365 glass fiber Substances 0.000 claims abstract description 36
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 25
- 239000004814 polyurethane Substances 0.000 claims abstract description 25
- 229920002635 polyurethane Polymers 0.000 claims abstract description 25
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 22
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 238000005187 foaming Methods 0.000 claims abstract description 9
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 5
- 229920005862 polyol Polymers 0.000 claims description 16
- 150000003077 polyols Chemical class 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 239000004970 Chain extender Substances 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 8
- 229920000570 polyether Polymers 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 150000003384 small molecules Chemical group 0.000 claims description 8
- 229920001228 polyisocyanate Polymers 0.000 claims description 7
- 239000005056 polyisocyanate Substances 0.000 claims description 7
- -1 polymethylene Polymers 0.000 claims description 7
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002313 adhesive film Substances 0.000 claims description 5
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 claims description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000004088 foaming agent Substances 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 239000004831 Hot glue Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 2
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 claims description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- PDXRQENMIVHKPI-UHFFFAOYSA-N cyclohexane-1,1-diol Chemical compound OC1(O)CCCCC1 PDXRQENMIVHKPI-UHFFFAOYSA-N 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000012972 dimethylethanolamine Substances 0.000 claims description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 2
- 235000011187 glycerol Nutrition 0.000 claims description 2
- 229940051250 hexylene glycol Drugs 0.000 claims description 2
- 239000012948 isocyanate Substances 0.000 claims description 2
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- PGYPOBZJRVSMDS-UHFFFAOYSA-N loperamide hydrochloride Chemical compound Cl.C=1C=CC=CC=1C(C=1C=CC=CC=1)(C(=O)N(C)C)CCN(CC1)CCC1(O)C1=CC=C(Cl)C=C1 PGYPOBZJRVSMDS-UHFFFAOYSA-N 0.000 claims description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 2
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2271/00—Use of polyethers, e.g. PEEK, i.e. polyether-etherketone or PEK, i.e. polyetherketone or derivatives thereof, as reinforcement
Abstract
The invention relates to a preparation method of a skylight pulling plate, which mainly solves the problems that in the prior art, a large amount of scrap materials are caused by adopting polyurethane foam sheets, the material utilization rate is low, the viscosity of conventional combined materials is low, and the conventional combined materials are not suitable for foaming of a die cavity, and the preparation method of the skylight pulling plate comprises the following steps: (1) Sequentially laying a first non-woven fabric layer and a first glass fiber felt layer on an operation platform of a framework die, uniformly spraying polyurethane composite A material and polyurethane composite B material on the surface of the first glass fiber felt layer, and then laying a second glass fiber felt layer and a second non-woven fabric layer; (2) Closing the mould, hot-pressing for more than 30 seconds at the temperature of 100-150 ℃, and foaming between the first glass fiber felt layer and the second glass fiber felt layer to form a polyurethane foam layer; (3) Taking out, standing under negative pressure, cooling, shaping, and punching to remove leftover materials to obtain a framework; (4) The technical scheme that the skylight pulling plate is assembled by attaching the fabric on at least one side of the framework well solves the problems, and can be used in industrial application of the automobile skylight pulling plate.
Description
Technical Field
The invention belongs to the field of automotive interiors, and particularly relates to a preparation method of a skylight pulling plate.
Background
Along with the improvement of living standard of people, the requirements of people on automobile performance are higher and higher, the automobile skylight pulling plate is an indispensable important part in an automobile assembly, the small automobile skylight sun shield commonly used at present is produced by adopting methods such as wet method, spraying and pouring, wherein a product produced by a wet method PU foam method is more and more stressed by skylight system manufacturers according to the excellent performance and lower price of the product, but the automobile skylight pulling plate of the current wet forming technology mainly comprises polyurethane foam sheets, non-woven fabrics, glass fiber mats, fabrics and buckles, the polyurethane foam sheets, the non-woven fabrics and the glass fiber mats are heated and molded in a mold to form a framework by coating polyurethane glue on the two sides of the polyurethane foam sheets, the non-woven fabrics and the glass fiber mats are attached to the fabrics, and the buckles are assembled, so that the labor hour is wasted, the polyurethane foam sheets are required to be prepared firstly, a large amount of leftover waste polyurethane foam is produced in the slicing process, and the utilization rate of polyurethane foam is low (about 60-70 percent), and finally the manufacturing cost of the skylight pulling plate is increased.
Chinese patent CN102126418B discloses a glass fiber reinforced polyurethane sun-shading board for sunroof and its production method, the materials are laid orderly according to the order of non-woven fabric layer, glass fiber felt layer, honeycomb paper layer, glass fiber felt layer from bottom to top or from top to bottom, polyurethane material is sprayed on the front and back of the materials, and the materials react under the temperature and pressure of the mould to realize the adhesion between the materials of each layer; however, the polyurethane materials sprayed by the polyurethane materials are all used for bonding, and the sun-shading board of the skylight taking honeycomb paper as a main structure has poor weather resistance and far lower humidity and heat aging resistance than the polyurethane foam structure.
Chinese patent CN109228564B discloses a sun visor composite material for automotive interior and a manufacturing process thereof, wherein a nonwoven fabric and a first adhesive film are pre-compounded, and a second adhesive film and a fabric layer are pre-compounded; firstly, coating a layer of polyurethane glue on two sides of PU foam, and then spraying a layer of water on the surface of the polyurethane glue; the non-woven fabrics, the first adhesive isolating film, the first glass fiber felt, the PU foam, the second glass fiber felt, the second adhesive isolating film and the fabric layer are sequentially stacked from bottom to top, and then are sent into a die of an oil press for hot press molding, the process is complex, the PU foam needs to be sliced firstly, the leftover material loss is caused, and the material utilization rate is low.
Disclosure of Invention
The technical problem to be solved by the invention is that the wet-formed skylight pulling plate in the prior art needs to prepare the polyurethane foam sheet firstly, a large amount of leftover scraps are caused by slicing, the material utilization rate is low, the conventional skylight pulling plate combination material has low viscosity and large flowing property, and is not applicable to the problem that a mold cavity is directly foamed, and the preparation method of the skylight pulling plate has the advantages of high viscosity of the skylight pulling plate combination material, integrated molding of a framework after the mold cavity is directly foamed, less manufacturing procedures and high material utilization rate.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the preparation method of the skylight pulling plate comprises the following steps:
(1) Sequentially laying a first non-woven fabric layer and a first glass fiber felt layer on an operation platform of a framework forming die, uniformly spraying polyurethane composite A material and polyurethane composite B material on the surface of the first glass fiber felt layer, and then laying a second glass fiber felt layer and a second non-woven fabric layer;
(2) Closing the mould, hot-pressing for more than 30 seconds at the temperature of 100-150 ℃ for carrying out mould pressing reaction, and directly foaming between the first glass fiber mat layer and the second glass fiber mat layer to form a polyurethane foam layer;
(3) Taking out, standing under negative pressure, cooling, shaping, punching to remove leftover materials, and obtaining a framework;
(4) Attaching a fabric on at least one surface of the framework, and assembling buckles to obtain a skylight pulling plate;
wherein, polyurethane combination A material includes by weight portion: 3.0 to 8.0 parts of foaming agent, 0.1 to 1.0 parts of catalyst and 1.0 to 1.5 parts of silicone oil; the polyurethane composite material B comprises the following components in parts by weight: 30-60 parts of polymer polyol, 30-80 parts of polyether polyol, 4.0-8.0 parts of small molecule chain extender and 150-200 parts of polyphenyl polymethylene polyisocyanate; the functionality of the polymer polyol is 2-3, the hydroxyl value is 24-56 mgKOH/g, and the solid content is 40-55%; the functionality of the polyether polyol is 2-6, and the hydroxyl value is 150-450 mgKOH/g; the small molecule chain extender is at least one of small molecule polyalcohol or polyamine, the functionality is 2-4, and the molecular weight is 60-180.
In the above-described aspect, it is preferable that the hot pressing process is performed at an initial stage of the hot pressing process twice or more.
In the above technical scheme, preferably, the pressure range of negative pressure standing, cooling and shaping is 0.5-0.8 Bar.
In the above technical solution, preferably, the polymer polyol is at least one selected from CHP-2045, CHP-2150 and CHP-2045D; the polyether polyol is at least one of CHE-204, CHE-304, CHE-306, CHE-307, NJ-4110A or NJ-8210A.
In the above technical solution, preferably, the small molecule chain extender is at least one selected from diethanolamine, triethanolamine, ethylenediamine, ethylene glycol, propylene glycol, butylene glycol, neopentyl glycol, hexylene glycol, cyclohexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, glycerin or pentaerythritol.
In the above technical scheme, preferably, the catalyst is at least one selected from TMR-2, NE300, NE1070, DPA, LED-103, DMEA or PT 303.
In the above technical solution, preferably, the foaming agent is water.
In the above technical solution, preferably, the silicone oil is at least one selected from L-3002, L-5309, L-5340, L-6920 and AK-8805.
In the above technical solution, preferably, the polyphenyl polymethylene polyisocyanate is at least one selected from PM-200, M20S, 44V20 or Suprasec 5005.
In the technical scheme, preferably, the viscosity of the modified isocyanate obtained after the reaction of the polyphenyl polymethylene polyisocyanate, the polymer polyol, the polyether polyol and the small molecular chain extender in the polyurethane composite material B is more than or equal to 4000 mPas (25 ℃).
In the above technical scheme, preferably, a hot melt adhesive film is sprayed on the surface of the first nonwoven fabric layer, which is contacted with the first glass fiber felt layer, and the surface of the second nonwoven fabric layer, which is contacted with the second glass fiber felt layer, and the corona value of the adhesive film is more than or equal to 52dyn.
According to the preparation method of the skylight pulling plate, the polyurethane composition A and the composition B are cooperated, the modified polyphenyl polymethylene polyisocyanate obtained by the composition B has high viscosity (more than 4000 mPa.s), low fluidity, and can effectively prevent the composition from flowing and gathering to the lower part, the whole composition flows slowly when being directly foamed in a framework die cavity, the obtained polyurethane foam layer product is uniform, the technical barriers that the viscosity of the conventional skylight pulling plate composition is low (less than 1000 mPa.s), the flowing speed is high, raw materials accumulate to the lower part of the cambered surface of the die cavity are overcome, and the polyurethane raw materials are directly foamed in the die cavity to form the polyurethane foam layer by adopting the preparation method of directly foaming in the die cavity, so that the loss of singly preparing the polyurethane foam sheet is greatly reduced, the problem that a large amount of corner waste materials and the material utilization rate are low due to the traditional foam slice after the material hot pressing is avoided, and a good technical effect is obtained.
The present invention is further illustrated by, but not limited to, the following examples.
Detailed Description
TABLE 1 bill of materials
[ example 1 ]
The preparation method of the skylight pulling plate comprises the following steps:
(1) The preparation method comprises the following steps of:
and (3) combining materials A: 6 parts of water, 0.3 part of TMR-2, 0.8 part of L-3002 and 0.2 part of L-5340;
and (3) a material B: 40 parts of CHP-2045, 80 parts of CHE-204, 6.0 parts of butanediol and 170 parts of M20S;
(2) According to the weight portions in the step (1), water, TMR-2, L-3002 and L-5340 are sequentially added into a container A, stirred at room temperature and uniformly mixed to obtain a combined A material; CHP-2045, CHE-204, butanediol and M20S are added into a container B in sequence, and stirred and reacted for 2 hours at the temperature of 120 ℃ to obtain a combined material B, wherein the viscosity of the combined material B is 4204 mpa.s (25 ℃);
(3) Preheating a skeleton forming die, wherein the upper die temperature is 120 ℃, the lower die temperature is 150 ℃, sequentially laying a first non-woven fabric layer and a first glass fiber felt layer on an operation platform, mixing polyurethane composite A material and polyurethane composite B material, uniformly spraying the mixture on the surface of the first glass fiber felt layer, and then laying a second glass fiber felt layer and a second non-woven fabric layer; wherein, the surface of the first non-woven fabric layer contacted with the first glass fiber felt layer and the surface of the second non-woven fabric layer contacted with the second glass fiber felt layer are coated with hot melt adhesive films, and the corona value of the adhesive films is 80dyn;
(4) Closing the mould, hot-pressing for 60 seconds to perform mould pressing reaction, exhausting air once in 8 th and 16 th seconds in the initial stage of the reaction, and directly foaming between the first glass fiber mat layer and the second glass fiber mat layer to form a polyurethane foam layer;
(5) Taking out, standing, cooling and shaping under the negative pressure of 0.5-0.8 Bar, punching to remove leftover materials, and obtaining a framework, wherein the material utilization rate of the polyurethane foam is 86%;
(6) And (3) attaching a fabric on one side of the framework, and assembling a buckle to obtain the skylight pulling plate, wherein the performance index data of the skylight pulling plate are shown in Table 3.
Examples 2 to 8
Examples 2 to 8 were carried out according to the steps of example 1, except that the reaction materials and the ratios of the materials in the composition A, B were different, and the specific examples are shown in Table 2; the performance index data of the obtained sunroof pulling plate are shown in Table 3.
Table 2 examples 1 to 8 combinations A, B parts by weight of the components in the materials
[ comparative example 1 ]
The preparation method of the skylight pulling plate comprises the following steps:
(1) The preparation method comprises the following steps of:
component A:100 parts of CHE-2801L, 40 parts of CHE-303, 15 parts of PS-3152, 7 parts of butanediol, 0.4 part of NE300, 0.3 part of NE1070, 1.3 part of AK-8805 and 6 parts of water, wherein the component B is as follows: 170 parts, in particular 170 parts of M20S;
(2) Preparing a component A:
according to the weight portion in the step (1), CHE-2801L, CHE-303, PS-3152, butanediol, NE300, NE1070, AK-8805 and water are added into a container A in sequence, and stirred uniformly at the temperature of 20-25 ℃ to obtain a mixed material I with the viscosity of 850 mPas (25 ℃);
(3) Preparing a component B:
according to the parts by weight in the step (1), 170 parts of M20S are added into a container B and stirred uniformly at the temperature of 23+/-2 ℃;
(4) Rapidly mixing and stirring the component A and the component B uniformly, rapidly injecting into a box-type mold prepared in advance, curing for 3 days after free foaming is finished, preparing polyurethane box foam, cutting off peripheral corner foam, and slicing to obtain a polyurethane foam sheet, wherein the slicing utilization rate of the box foam is 65%;
(5) Sequentially stacking non-woven fabrics, glass fiber felt, polyurethane foam sheets, glass fiber felt and non-woven fabrics by coating polyurethane glue on two sides of a polyurethane foam sheet, heating at 145 ℃ in a die, molding for 60s, standing under negative pressure of 0.5-0.8 Bar, cooling and shaping, and punching to remove leftover materials to obtain a framework; and (3) heating the bonded fabric, and assembling the buckle to obtain the skylight pulling plate, wherein the performance index data of the skylight pulling plate are shown in Table 3.
Table 3 performance test data of the roof rail in examples 1 to 8 and comparative example 1
The specific test methods and performance requirements are shown in table 4:
table 4 performance test criteria for the roof rail in examples 1 to 8 and comparative example 1
As can be seen from the data results in Table 3, the composite materials in examples 1 to 8 of the present invention have the advantages of high viscosity, small flowing property in the mold cavity, uniform foam material obtained after foaming, performance indexes of the prepared skylight pulling plate all meeting performance requirements of the existing skylight pulling plate products, and the polyurethane foam material prepared by the present invention has high utilization rate, compared with the conventional box-type foaming and slicing method in comparative example 1, the present invention avoids the generation of a large amount of corner waste bubbles, the material utilization rate is improved from 65% to more than 80%, and the production cost is saved.
Claims (9)
1. The preparation method of the skylight pulling plate comprises the following steps:
(1) Sequentially laying a first non-woven fabric layer and a first glass fiber felt layer on an operation platform of a framework forming die, uniformly spraying polyurethane composite A material and polyurethane composite B material on the surface of the first glass fiber felt layer, and then laying a second glass fiber felt layer and a second non-woven fabric layer;
(2) Closing the mould, hot-pressing for more than 30 seconds at the temperature of 100-150 ℃ for carrying out mould pressing reaction, and directly foaming between the first glass fiber mat layer and the second glass fiber mat layer to form a polyurethane foam layer;
(3) Taking out, standing under negative pressure, cooling, shaping, punching to remove leftover materials, and obtaining a framework;
(4) Attaching a fabric on at least one surface of the framework, and assembling buckles to obtain a skylight pulling plate;
wherein, polyurethane combination A material includes by weight portion: 3.0 to 8.0 parts of foaming agent, 0.1 to 1.0 parts of catalyst and 1.0 to 1.5 parts of silicone oil; the polyurethane composite material B comprises the following components in parts by weight: 30-60 parts of polymer polyol, 30-80 parts of polyether polyol, 4.0-8.0 parts of small molecule chain extender and 150-200 parts of polyphenyl polymethylene polyisocyanate; the functionality of the polymer polyol is 2-3, the hydroxyl value is 24-56 mgKOH/g, and the solid content is 40-55%; the functionality of the polyether polyol is 2-6, and the hydroxyl value is 150-450 mgKOH/g; the small molecule chain extender is at least one of small molecule polyalcohol or polyamine, the functionality is 2-4, and the molecular weight is 60-180.
2. The method for manufacturing a sunroof panel according to claim 1, wherein the hot pressing process is performed at an initial stage of two or more times of exhaust; the pressure range of negative pressure standing, cooling and shaping is 0.5-0.8 Bar.
3. The method of producing a sunroof pulling plate according to claim 1, wherein the polymer polyol is at least one selected from CHP-2045, CHP-2150 and CHP-2045D; the polyether polyol is at least one of CHE-204, CHE-304, CHE-306, CHE-307, NJ-4110A or NJ-8210A.
4. The method for producing a sunroof pulling plate according to claim 1, wherein the small molecule chain extender is at least one selected from the group consisting of diethanolamine, triethanolamine, ethylenediamine, ethylene glycol, propylene glycol, butylene glycol, neopentyl glycol, hexylene glycol, cyclohexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, glycerin and pentaerythritol.
5. The method for producing a sunroof pulling plate according to claim 1, wherein the catalyst is at least one selected from the group consisting of TMR-2, NE300, NE1070, DPA, LED-103, DMEA and PT 303; the foaming agent is water.
6. The method of manufacturing a sunroof pulling plate according to claim 1, wherein the silicone oil is at least one selected from the group consisting of L-3002, L-5309, L-5340, L-6920 and AK-8805.
7. The method for producing a sunroof pulling plate according to claim 1, wherein the polyphenyl polymethylene polyisocyanate is at least one selected from the group consisting of PM-200, M20S, 44V20 and Suprasec 5005.
8. The method for producing a sunroof pulling plate according to claim 7, wherein the modified isocyanate obtained by reacting the polyphenyl polymethylene polyisocyanate in the polyurethane composition B with the polymer polyol, the polyether polyol and the small molecular chain extender has a viscosity of 4000 mPas (25 ℃ C.) or more.
9. The method for manufacturing a sunroof pulling plate according to claim 1, wherein a hot melt adhesive film is sprayed on the surface of the first nonwoven fabric layer contacted with the first glass fiber mat layer and the surface of the second nonwoven fabric layer contacted with the second glass fiber mat layer, and the corona value of the adhesive film is more than or equal to 52dyn.
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| CN202211278093.5A CN116872517A (en) | 2022-10-19 | 2022-10-19 | Preparation method of skylight pulling plate |
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| CN202211278093.5A CN116872517A (en) | 2022-10-19 | 2022-10-19 | Preparation method of skylight pulling plate |
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| CN202211278093.5A Pending CN116872517A (en) | 2022-10-19 | 2022-10-19 | Preparation method of skylight pulling plate |
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