CN108116007A - Automobile engine nacelle sound-heat insulated cushion of composite construction and preparation method thereof - Google Patents
Automobile engine nacelle sound-heat insulated cushion of composite construction and preparation method thereof Download PDFInfo
- Publication number
- CN108116007A CN108116007A CN201611071061.2A CN201611071061A CN108116007A CN 108116007 A CN108116007 A CN 108116007A CN 201611071061 A CN201611071061 A CN 201611071061A CN 108116007 A CN108116007 A CN 108116007A
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- China
- Prior art keywords
- layer
- automobile engine
- composite construction
- heat insulated
- engine nacelle
- Prior art date
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- Pending
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- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000004814 polyurethane Substances 0.000 claims abstract description 47
- 239000003063 flame retardant Substances 0.000 claims abstract description 25
- 229920002635 polyurethane Polymers 0.000 claims abstract description 24
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000005030 aluminium foil Substances 0.000 claims abstract description 17
- 238000004080 punching Methods 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims description 79
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 22
- 239000004745 nonwoven fabric Substances 0.000 claims description 20
- 239000012948 isocyanate Substances 0.000 claims description 18
- 150000002513 isocyanates Chemical class 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 17
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000005060 rubber Substances 0.000 claims description 16
- 229920000570 polyether Polymers 0.000 claims description 14
- 238000005187 foaming Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 5
- 239000005977 Ethylene Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 206010000269 abscess Diseases 0.000 description 2
- -1 diene hydrocarbon Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000018984 mastication Effects 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
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- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
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- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
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- B32B2264/10—Inorganic particles
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- B32B2266/02—Organic
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
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- B32B2307/00—Properties of the layers or laminate
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B32B2605/00—Vehicles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Fluid Mechanics (AREA)
- Textile Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Automobile engine nacelle sound-heat insulated cushion the present invention relates to a kind of composite construction and preparation method thereof is five-layer structure, including punching aluminium foil layer, nonwoven layer, flame retardant polyurethane layer, double-layer and the nonwoven layer set gradually from top to bottom.Compared with prior art, the present invention can play absorption, attenuation to high frequency and low frequency noise, strengthen whole sound insulation, noise reduction, heat-insulated effect so as to play, and pts wt reduces by 70% compared with existing structure.
Description
Technical field
The present invention relates to a kind of auto sound-insulating and thermal-insulating pad, more particularly, to a kind of automobile engine nacelle of composite construction with every
Sound heat insulating mattress and preparation method thereof.
Background technology
Front panel mainly includes two kinds of structures in the enging cabin of automobile industry at present:(1) overwhelming majority uses resin-oatmeal
Glass fiber material is added to make part.Since the engine in enging cabin can generate larger noise and very high temperature at work
Degree, big using above-mentioned material pts wt, sound-insulating and heat-insulating effect is general, and glass is very big to the pollution of environment.(2) resin-oatmeal
The composite construction of+cotton fiber:Weight weight, of high cost, complex process.
Chinese patent CN103182810A discloses a kind of enging cabin composite stratotype sound-heat insulated cushion, is located at automobile hair
In motivation, which is three-decker, and upper surface layer and undersurface layer are density 100g/cm2Non-woven fabrics, interlayer
For density 13-18kg/m3Flame retardant polyurethane layer, non-woven fabrics through hot pressing connects on flame retardant polyurethane layer, the upper surface
The aluminium foil reflecting layer that a layer thickness is 0.1mm is also set up on layer, the application material five-layer structure adds on the basis of the patent
1.5-2.0kg/m2Double-layer, compared to the patent engine compartment noise soundproof effect be better than 30%-40%.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of light-weight, sound insulation is good
The automobile engine nacelle sound-heat insulated cushion of composite construction and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of automobile engine nacelle sound-heat insulated cushion of composite construction is five-layer structure, including setting successively from top to bottom
Punching aluminium foil layer, nonwoven layer, flame retardant polyurethane layer, double-layer and the nonwoven layer put.
The density of the double-layer is 1.5-2.0kg/m2, make to obtain using following methods:
(1) stock up by following components and weight percent content:Rubber 30-40, mineral-filled object 57-69, graphite 1-3;
(2) above-mentioned raw materials are placed in mixer, controlled at 160-200 DEG C of batch mixing mixing 15-20min;
(3) in 130-170 DEG C of mill 10-20min after mixing;
(4) after mill, roll-in slice is carried out, last to carry out cut size as needed, making obtains double-layer.
The rubber is the EP rubbers using ethylene and propylene as primary raw material.
The mineral-filled object be calcium carbonate or barium sulfate,
The graphite particle size is 100-300 μm.
The thickness of the punching aluminium foil is 0.1-0.2mm.
The density of the non-woven fabrics is 80-120g/m2。
The flame retardant polyurethane layer be isocyanates, graphite powder, polyethers be by weight 1 ︰ (1-2) ︰ (8-12) mix,
Foamed again, curing, section obtain, thickness 15-30mm.
The isocyanates can influence the cell size of PUR, toughness, and density controls NCO content 25- in isocyanates
35wt%, storage temperature are kept for 10-20 DEG C,
The polyethers can influence the inspiration speed of PUR foaming, and storage temperature is kept for 10-20 DEG C, while also big to abscess
Small, toughness, density has a certain impact,
The granular size of the graphite powder is 100-500 μm, mainly plays fire retardation.
The production method of the automobile engine nacelle sound-heat insulated cushion of composite construction, using following steps:
(1) preparation of PUR materials:
Graphite powder and polyethers are uniformly mixed according to a ratio by (1-1),
(1-2) is added in the mixture obtained in isocyanates and step (1-1) in foaming machine by proportioning, controlled at
25-30 DEG C, curing 30-40min is to get to PUR materials;
The PUR materials obtained after foaming are sliced into the flame retardant polyurethane layer of thickness 15-30mm by (1-3);
(2) it is hot-forming
Punching aluminium foil layer, non-woven fabrics, flame retardant polyurethane layer, double-layer and non-woven fabrics are arranged successively from top to bottom, Ran Houjin
Row is hot-forming, and the temperature for controlling hot pressing is 150-170 DEG C, pressure 150-200bar, compression process 120-500s;
(3) cooling and shaping
Hot-forming product is cooled down into 30s-2min at room temperature and carries out cooling and shaping, that is, makes and obtains product.
Compared with prior art, the present invention increases high-low temperature resistant double-layer material composition, with existing similar no double-layer part phase
Than on the basis of not influencing to noise sound-absorbing, 30%-40%, while high frequency and low frequency are also better than to noise soundproof effect
Noise can play the role of blocking, failure, strengthen whole sound insulation, noise reduction so as to play, provide good sound insulation
And heat insulation.
Double-layer is based on artificial rubber and mineral-filled mixing, is chemically reacted by mill and mixing, formation
Ethylene-propylene-diene monomer glue-line, wherein graphite are black, have polishing and fire-retardant effect to double-layer, since ethylene propylene diene rubber is second
The terpolymer of alkene, propylene and non-conjugated diene hydrocarbon can have anti-with high temperature resistant, resistance to oxidation and to polar solvent and chemicals
Property, water absorption rate is low, has good insulation characterisitic, and strand is tightly combined, and has apparent blocking to sound wave, this kind of characteristic is suitble to
Enging cabin working environment.
Since enging cabin working environment is severe, to double-layer high temperature resistant, it is ageing-resistant, fire-retardant have very high requirement, double-layer
Belong to rubber, by hot mastication and layer of polyurethane, the non-woven fabrics of upper and lower layer, carry out molding autoadhesion, double-layer is to temperature ratio
More sensitive, temperature is excessively high, can soften completely, and fracture is so as to just lose corresponding function, when temperature is too low, it is impossible to upper and lower layer
Layer of polyurethane, non-woven fabrics molding autoadhesion.
Description of the drawings
Fig. 1 is the performance test figure of product in embodiment 1-3.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.Following embodiment will be helpful to this field
Technical staff further understand the present invention, but the invention is not limited in any way.It should be pointed out that the general of this field
For logical technical staff, without departing from the inventive concept of the premise, various modifications and improvements can be made.These are belonged to
Protection scope of the present invention.
Embodiment 1
A kind of automobile engine nacelle sound-heat insulated cushion of composite construction, is located in automobile engine, the sound-heat insulated cushion
It is respectively the punching aluminium foil that first layer is 0.10mm thickness from surface layer to layer for five-layer structure, second layer density 100g/
m2Non-woven fabrics, third layer be density 13kg/m3Flame retardant polyurethane layer, the 4th layer be 1.5kg/m2Double-layer, layer 5 is
100g/m2 non-woven fabrics, wherein, flame retardant polyurethane layer passes through after being mixed by weight for 1 ︰, 1 ︰ 8 by isocyanates, graphite powder, polyethers
It foams, cure and cut into slices to obtain, the temperature of curing is 25 DEG C, and the time of curing is 40min, and the thickness of flame retardant polyurethane layer is
25mm。
Double-layer makes to obtain using following methods:
(1) stock up by following components and weight percent content:Rubber 30%, mineral-filled object 69%, graphite 1%,
The middle rubber used is using ethylene and propylene as the EP rubbers of primary raw material, and mineral-filled object is calcium carbonate, and graphite particle is big
Small is 100 μm;
(2) above-mentioned raw materials are placed in mixer, controlled at 160 DEG C of batch mixing mixing 20min;
(3) in 130 DEG C of mill 20min after mixing;
(4) after mill, roll-in slice is carried out, last to carry out cut size as needed, making obtains double-layer.
The preparation method of automobile using PUR material engine bonnet parts, comprises the following steps:
(1) preparation of PUR materials:
Graphite powder and polyethers are uniformly mixed according to a ratio by (1-1),
(1-2) is added in the mixture obtained in isocyanates and step (1-1) in foaming machine by proportioning, controlled at
25 DEG C, curing 40min is to get to the PUR materials;
The PUR material cut into serving pieces that (1-3) will be obtained after foaming, specific thickness are cut into slices according to the requirement of client.
(2) it is hot-forming:
Punching aluminium foil layer, non-woven fabrics, flame retardant polyurethane layer, double-layer and non-woven fabrics are arranged successively from top to bottom, Ran Houjin
Row is hot-forming, and the temperature for controlling hot pressing is 150 DEG C, pressure 200bar, compression process 500s;
(3) cooling and shaping:
Controlling cooling temperature, cooling time carries out cooling and shaping for 3min for room temperature, that is, makes and obtain product.
Embodiment 2
A kind of automobile engine nacelle sound-heat insulated cushion of composite construction is five-layer structure, including setting successively from top to bottom
Punching aluminium foil layer, nonwoven layer, flame retardant polyurethane layer, double-layer and the nonwoven layer put.
The density of double-layer is 1.5kg/m2, the thickness of aluminium foil is punched as 0.1mm, and the density of non-woven fabrics is 80g/m2.It is fire-retardant poly-
Urethane layer is that isocyanates, graphite powder, polyethers are that 1 ︰, 1 ︰ 8 are mixed by weight, then foamed, curing, section obtain, and thickness is
15mm, wherein, isocyanates can influence the cell size of PUR, toughness, and density controls NCO content 25- in isocyanates
35wt%, storage temperature are kept for 10 DEG C, and polyethers can influence the inspiration speed of PUR foaming, and storage temperature is kept for 10 DEG C, while also right
Cell size, toughness, density have a certain impact, and the granular size of graphite powder is 100 μm, mainly plays fire retardation.
Double-layer makes to obtain using following methods:
(1) stock up by following components and weight percent content:Rubber 40%, mineral-filled object 57%, graphite 3%,
The middle rubber used is using ethylene and propylene as the EP rubbers of primary raw material, and mineral-filled object is barium sulfate, and graphite particle is big
Small is 200 μm;
(2) above-mentioned raw materials are placed in mixer, controlled at 180 DEG C of batch mixing mixing 20min;
(3) in 150 DEG C of mill 15min after mixing;
(4) after mill, roll-in slice is carried out, last to carry out cut size as needed, making obtains double-layer.
The production method of the automobile engine nacelle sound-heat insulated cushion of composite construction, using following steps:
(1) preparation of PUR materials:
Graphite powder and polyethers are uniformly mixed according to a ratio by (1-1),
(1-2) is added in the mixture obtained in isocyanates and step (1-1) in foaming machine by proportioning, controlled at
25 DEG C, curing 40min is to get to PUR materials;
The PUR materials obtained after foaming are sliced into the flame retardant polyurethane layer of thickness 15mm by (1-3);
(2) it is hot-forming
Punching aluminium foil layer, non-woven fabrics, flame retardant polyurethane layer, double-layer and non-woven fabrics are arranged successively from top to bottom, Ran Houjin
Row is hot-forming, and the temperature for controlling hot pressing is 150 DEG C, pressure 200bar, compression process 120s;
(3) cooling and shaping
Hot-forming product is cooled down into 30s at room temperature and carries out cooling and shaping, that is, makes and obtains product.
Embodiment 3
A kind of automobile engine nacelle sound-heat insulated cushion of composite construction is five-layer structure, including setting successively from top to bottom
Punching aluminium foil layer, nonwoven layer, flame retardant polyurethane layer, double-layer and the nonwoven layer put, the density of double-layer is 2.0kg/m2, punching
The thickness of aluminium foil is 0.2mm.The density of non-woven fabrics is 120g/m2.Flame retardant polyurethane layer is isocyanates, graphite powder, polyethers are pressed
Weight ratio mixes for 1 ︰, 2 ︰ 12, then foamed, curing, section obtain, thickness 30mm.Isocyanates can influence the abscess of PUR
Size, toughness, density control NCO content 35wt% in isocyanates, and storage temperature is kept for 20 DEG C, and polyethers can influence PUR foaming
Inspiration speed, storage temperature is kept for 20 DEG C, while also to cell size, toughness, density has a certain impact, of graphite powder
Grain size is 500 μm, mainly plays fire retardation.
Double-layer makes to obtain using following methods:
(1) stock up by following components and weight percent content:Rubber 35%, mineral-filled object 63%, graphite 2%,
The middle rubber used is using ethylene and propylene as the EP rubbers of primary raw material, and mineral-filled object is calcium carbonate, and graphite particle is big
Small is 300 μm;
(2) above-mentioned raw materials are placed in mixer, controlled at 200 DEG C of batch mixing mixing 15min;
(3) in 170 DEG C of mill 10min after mixing;
(4) after mill, roll-in slice is carried out, last to carry out cut size as needed, making obtains double-layer.
The production method of the automobile engine nacelle sound-heat insulated cushion of composite construction, using following steps:
(1) preparation of PUR materials:
Graphite powder and polyethers are uniformly mixed according to a ratio by (1-1),
(1-2) is added in the mixture obtained in isocyanates and step (1-1) in foaming machine by proportioning, controlled at
30 DEG C, curing 30min is to get to PUR materials;
The PUR materials obtained after foaming are sliced into the flame retardant polyurethane layer of thickness 15-30mm by (1-3);
(2) it is hot-forming
Punching aluminium foil layer, non-woven fabrics, flame retardant polyurethane layer, double-layer and non-woven fabrics are arranged successively from top to bottom, Ran Houjin
Row is hot-forming, and the temperature for controlling hot pressing is 170 DEG C, pressure 150bar, compression process 120s;
(3) cooling and shaping
Hot-forming product is cooled down into 2min at room temperature and carries out cooling and shaping, that is, makes and obtains product.
Fig. 1 is the detection data of product in embodiment 1-3, and from the results of view, embodiment 3 is best, and embodiment 1 is taken second place, real
It is poor to apply example 2, i.e. the density of double-layer is 2.0kg/m2, the thickness for punching aluminium foil is 0.2mm.Isocyanates sheet material be 30mm, nothing
The density of woven fabric is 120g/m2Combination it is optimal, it can be seen that increase the density or thickness of each layer, to the blocking of sound wave most
It is good, while technological temperature is 170 DEG C, pressure 150bar, compression process 120s is also the preferably group for most saving time and the energy
It closes, which kind of combination of materials client can need according to the considerations of own cost and vehicle.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (9)
1. the automobile engine nacelle sound-heat insulated cushion of a kind of composite construction, which is characterized in that the sound-heat insulated cushion is five layers of knot
Structure, including punching aluminium foil layer, nonwoven layer, flame retardant polyurethane layer, double-layer and the nonwoven layer set gradually from top to bottom.
A kind of 2. automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 1, which is characterized in that institute
The density for the double-layer stated is 1.5-2.0kg/m2。
A kind of 3. automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 1, which is characterized in that institute
The double-layer stated makes to obtain using following methods:
(1) stock up by following components and weight percent content:Rubber 30-40, mineral-filled object 57-69, graphite 1-3;
(2) above-mentioned raw materials are placed in mixer, controlled at 160-200 DEG C of batch mixing mixing 15-20min;
(3) in 130-170 DEG C of mill 10-20min after mixing;
(4) after mill, roll-in slice is carried out, last to carry out cut size as needed, making obtains double-layer.
4. a kind of automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 3, which is characterized in that
The rubber is the EP rubbers using ethylene and propylene as primary raw material,
The mineral-filled object be calcium carbonate or barium sulfate,
The graphite particle size is 100-300 μm.
A kind of 5. automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 1, which is characterized in that institute
The thickness for the punching aluminium foil stated is 0.1-0.2mm.
A kind of 6. automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 1, which is characterized in that institute
The density for the non-woven fabrics stated is 80-120g/m2。
A kind of 7. automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 1, which is characterized in that institute
The flame retardant polyurethane layer stated be isocyanates, graphite powder, polyethers be by weight 1 ︰ (1-2) ︰ (8-12) mix, then it is foamed,
Curing, section obtain, thickness 15-30mm.
8. a kind of automobile engine nacelle sound-heat insulated cushion of composite construction according to claim 7, which is characterized in that
NCO content 25-35wt% in the isocyanates, storage temperature are kept for 10-20 DEG C,
The storage temperature of the polyethers is kept for 10-20 DEG C,
The granular size of the graphite powder is 100-500 μm.
9. the production method of the automobile engine nacelle sound-heat insulated cushion of composite construction as described in claim 1, feature exist
In this method uses following steps:
(1) preparation of PUR materials:
Graphite powder and polyethers are uniformly mixed according to a ratio by (1-1),
(1-2) is added in the mixture obtained in isocyanates and step (1-1) in foaming machine by proportioning, controlled at 25-
30 DEG C, curing 30-40min is to get to PUR materials;
The PUR materials obtained after foaming are sliced into the flame retardant polyurethane layer of thickness 15-30mm by (1-3);
(2) it is hot-forming
Punching aluminium foil layer, non-woven fabrics, flame retardant polyurethane layer, double-layer and non-woven fabrics are arranged successively from top to bottom, then carry out heat
Molded, the temperature for controlling hot pressing is 150-170 DEG C, pressure 150-200bar, compression process 120-500s;
(3) cooling and shaping
Hot-forming product is cooled down into 30s-2min at room temperature and carries out cooling and shaping, that is, makes and obtains product.
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