CN112743944B - Sheet for engine air inlet pipe, preparation method of sheet and engine air inlet pipe using sheet - Google Patents

Sheet for engine air inlet pipe, preparation method of sheet and engine air inlet pipe using sheet Download PDF

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Publication number
CN112743944B
CN112743944B CN201911049862.2A CN201911049862A CN112743944B CN 112743944 B CN112743944 B CN 112743944B CN 201911049862 A CN201911049862 A CN 201911049862A CN 112743944 B CN112743944 B CN 112743944B
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China
Prior art keywords
sheet
layer
material layer
nvh
phase change
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CN201911049862.2A
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Chinese (zh)
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CN112743944A (en
Inventor
李应哲
尹泰珉
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Hyundai Motor Co
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
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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
    • 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
    • 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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268—Heating, cooling or thermal insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10334—Foams; Fabrics; Porous media; Laminates; Ceramics; Coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10354—Joining multiple sections together
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • 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
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a sheet for an engine air inlet pipe, a preparation method thereof and an engine air inlet pipe using the sheet. A sheet for an engine air intake, comprising: a first material layer comprising PET and low melting point fibers; a second material layer comprising PP/PE, PET and low melting point fibers; a third material layer comprising a PP spunbond layer; a fourth material layer comprising PP/PE, PET and low melting point fibers; a fifth material layer comprising PET and low melting point fibers; a sixth material layer comprising PP/PE, PET and low melting point fibers; wherein particles of the phase change material are dispersed in the second material layer, the third material layer, the fourth material layer and the fifth material layer; the melting point of the phase change material is within the range of 47-65 ℃. By the invention, the temperature of the air inlet entering the engine through the air inlet pipe is kept within a certain temperature range, so that the fuel is favorable for fully burning in the engine, the fuel efficiency of the engine is improved, and the torque of the engine can be increased.

Description

Sheet for engine air inlet pipe, preparation method of sheet and engine air inlet pipe using sheet
Technical Field
The invention relates to a sheet for an engine air inlet pipe, a preparation method thereof and an engine air inlet pipe using the sheet.
Background
With technological development and environmental changes, the demands of users on automobiles are also becoming higher and higher. In order to protect the environment and reduce maintenance costs of the vehicle, and in order to reduce the amount of exhaust gas of the vehicle, to improve fuel efficiency and to provide comfortable drivability to the driver, the performance of the vehicle also needs to be greatly improved. In addition, the requirements for pollutants emitted by engine combustion are becoming more stringent in the "national sixth" automotive pollutant emission standards that are to be applied in china. It is therefore necessary to fully combust the fuel in the engine.
An intake system of an engine is for supplying new air required for combustion to an engine of a vehicle, and an intake pipe in the intake system guides the new air outside a cavity of the engine to an air cleaner, through which the new air is supplied into the engine. For the air inlet pipe in the prior art, a plurality of layers of PET materials are generally compressed and welded together to form a pipe which can maintain the shape of the pipe and has certain rigidity, and the pipe also has a better waterproof/impurity inflow-proof coating film. However, the air inlet pipe in the prior art cannot effectively prevent heat generated by the engine from being transmitted to the new air in the air inlet pipe, so that the oxygen content in the new air per quantitative volume is reduced, the engine is further insufficient in combustion, the fuel efficiency is reduced, and the overall performance of the engine is also reduced.
Therefore, development of a new air intake duct that can maintain excellent waterproof and impurity-preventing properties and rigidity of the air intake duct of the prior art, and also has excellent heat insulating properties and sound absorbing properties, has become very necessary.
The above description of the background is only for the purpose of facilitating a thorough understanding of the present invention's aspects (in terms of the means of technology used, the technical problems solved, and the technical effects produced, etc.) and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, the temperature of air entering an engine through an engine air inlet pipe is high, the engine is not fully combusted, the fuel efficiency and the engine performance are reduced, and provides a completely novel sheet for the engine air inlet pipe, a preparation method and application thereof, and an engine air inlet pipe using the sheet. By the invention, the temperature of the air entering the engine through the air inlet pipe of the engine is kept within a certain temperature range, so that the fuel is favorable for fully burning in the engine, the fuel efficiency of the engine is improved, and the torque of the engine can be increased.
The present invention provides a sheet for an intake pipe of an engine, comprising:
a first material layer comprising PET and low melting point fibers;
a second material layer comprising PP/PE, PET and low melting point fibers;
a third material layer comprising a PP spunbond layer;
a fourth material layer comprising PP/PE, PET and low melting point fibers;
a fifth material layer comprising PET and low melting point fibers;
a sixth material layer comprising PP/PE, PET and low melting point fibers;
wherein particles of the phase change material are dispersed in the second material layer, the third material layer, the fourth material layer and the fifth material layer; the melting point of the phase change material is within the range of 47-65 ℃.
The first material layer to the sixth material layer are sequentially stacked.
The PET is a material commonly used in the art, commonly referred to as polyethylene terephthalate, and is typically present in the form of a polymeric plastic in the material layer.
The low-melting-point fiber is a material commonly used in the field, is a fiber structure, is produced by composite spinning of common polyester and modified polyester, and has a melting point generally within the range of 150-180 ℃.
The PP/PE is a common material in the field, PP is polypropylene, PE is polyethylene, and the PP/PE is a plastic material composed of polypropylene and polyethylene.
The phase change material (PCM-Phase Change Material) refers to a substance that changes a state of a substance and can provide latent heat under the condition of constant temperature. The process of changing the physical properties of a phase change material is called a phase change process, for example, a physical change process between mutually different states from a solid state to a liquid state, or from a liquid state to a solid state, in which the phase change material absorbs or releases a large amount of latent heat. According to the invention, the specific phase change material is integrally matched with the specific material layers to obtain the brand new sheet, so that the air inlet pipe comprising the sheet can effectively prevent heat of the engine from being conducted to new air, and the air inlet temperature is kept within a certain range.
In some embodiments, the phase change material comprises: paraffin wax.
In some embodiments, the phase change material is paraffin wax.
Paraffin waxes, also known as crystalline waxes, are mixtures of hydrocarbons having from about 18 to about 30 carbon atoms, the main component being linear alkanes, and also small amounts of individually branched alkanes and long-chain monocyclic cycloalkanes. Usually a white, odorless waxy solid, which melts at 47℃to 65℃and has a density of about 0.9g/cm 3 Dissolving in nonpolar solvents such as gasoline, carbon disulfide, xylene, diethyl ether, benzene, chloroform, carbon tetrachloride, naphtha, etc., and insoluble in polar solvents such as water and methanol. Paraffin is a good heat storage material, and the specific heat capacity is 2.14-2.9J.g –1 ·K –1 The heat of fusion is 200-220 J.g –1 。
In some embodiments, the phase change material is present in the sheet in an amount of 5% to 20% by mass.
In some embodiments, the content of the low-melting fiber in the first material layer is 30% to 60%, preferably 40% to 60% by mass.
In some embodiments, the content of the low-melting fiber in the sixth material layer is 30% to 60%, preferably 40% to 60% by mass.
When the phase change material in the pipe changes phase, tiny volume change can be generated, the pipe can slightly bulge after long-time use, the phase change material loss phenomenon can occur along with the longer running time, and the air inlet temperature reducing effect of the air inlet pipe can be weakened gradually after long-time use. In a preferred scheme of the invention, the first material layer and the sixth material layer contain low-melting-point fibers with specific content, and the following functions are realized by matching with other material layers as a whole: the air inlet pipe made of the sheet material of the invention can not generate volume change, thereby always keeping the original pipe shape of the air inlet pipe and avoiding the loss of phase change materials.
In some embodiments, the sheet may further include an NVH adjusting layer; the NVH adjusting layer is formed on the outer side of the first material layer; the NVH adjustment layer comprises: PET and low melting point fibers.
NVH is an English abbreviation for Noise, vibration and Harshness, and is a comprehensive issue in measuring the quality of automobile manufacturing. The NVH adjusting (NVH Tuning) is applied to the air inlet pipe, so that the air inlet pipe can keep excellent thermal breaking resistance and has better sound absorption and vibration prevention effects. The NVH adjusting layer is formed on the outer side of the first material layer, that is, when the product sheet is formed into the air inlet pipe, the NVH adjusting layer is positioned on the outermost side of the air inlet pipe.
In the NVH adjusting layer, the content of PET is 70-90% by mass ratio.
In the NVH adjusting layer, the content of the low-melting-point fiber is 10-30% by mass ratio.
In some preferred embodiments, particles of phase change material are dispersed in the NVH adjustment layer.
The NVH adjustment layer preferably has a thickness of 0.5mm to 0.8mm.
The invention provides a method for preparing a sheet for an engine air inlet pipe, which comprises the following steps:
a first step in which a sheet raw material is immersed in a first solution containing a phase change material, and subjected to moisture absorption and drying to obtain an immersed and dried sheet material; wherein the sheet raw material comprises: a first material layer, a second material layer, a third material layer, a fourth material layer, a fifth material layer, and a sixth material layer as described above;
a second step in which the impregnated and dried sheet material is subjected to a hot pressing process and a cooling process, obtaining the final sheet.
In some embodiments, the phase change material comprises: paraffin wax.
In some embodiments, the phase change material is paraffin wax.
In some embodiments, the first solution comprising a phase change material comprises: paraffin wax, adhesive, cross-linking agent and water; the paraffin wax accounts for 40-50% of the total mass of the adhesive, the adhesive accounts for 17-19% of the total mass of the adhesive, the cross-linking agent accounts for 1-3% of the total mass of the adhesive, and the water accounts for 30-40% of the total mass of the adhesive.
Regarding the first solution containing the phase change material, it is preferable to prepare the first solution containing the phase change material by mixing the paraffin wax, the binder, the crosslinking agent, and water at a temperature of 50 to 70 ℃.
In the above first step, the impregnation process and the hygroscopic drying process may use an operation process conventional in the art as long as it is satisfied that the above phase change material can be uniformly dispersed in the sheet raw material. In some preferred embodiments, the impregnation and hygroscopic drying processes described above are operated at temperatures of 50 ℃ to 70 ℃. The hygroscopic drying process is preferably accomplished by adding a hygroscopic agent. As the moisture absorbent, those conventionally commercially available in the art can be used. In the first step, the content of the phase change material dispersed in the sheet raw material may be adjusted by the number of times and time of impregnation and moisture absorption drying, and as the number of times is larger and the time is longer, the content of the phase change material dispersed in the sheet raw material is also increased.
In the second step described above, the hot pressing process and the cooling process may use an operation process conventional in the art. In some preferred embodiments, the hot pressing process includes the steps of: and heating the sheet material, introducing the sheet material into a die for compression molding, wherein the temperature of an upper die of the die corresponding to the first material layer is 200-220 ℃, and the temperature of a lower die is 140-180 ℃.
And the phase change material in the finally obtained sheet is dispersed in the second material layer, the third material layer, the fourth material layer and the fifth material layer, and substances contained in the first material layer and the sixth material layer are subjected to hot press molding to form a closed coating film.
In some embodiments, the method of making a sheet further comprises an NVH modifying layer forming step comprising: a preparation step of NVH adjusting layer and a hot press molding step.
The NVH adjusting layer comprises the following raw materials: PET and low melting point fibers.
Preferably, before the preparing step and the hot press forming step, the raw material of the NVH adjusting layer may be immersed in the second solution containing the phase change material, and the phase change material may be dispersed in the raw material of the NVH adjusting layer through moisture absorption and drying. The hygroscopic drying process is the same as the hygroscopic drying process already mentioned above, as long as the phase change material is dispersed in the raw material. The content of the phase change material dispersed in the raw material of the NVH adjusting layer is not particularly limited as long as it is satisfied that the phase change material is contained. Conventionally, after the above-mentioned moisture absorption drying process, the content of the phase change material dispersed in the raw material of the NVH adjusting layer is 5% to 8% by mass ratio.
The second solution containing the phase change material includes, when impregnating the raw material of the NVH adjusting layer: paraffin wax, adhesive, cross-linking agent and water; the paraffin wax accounts for 30-40% of the total mass of the adhesive, the adhesive accounts for 17-19% of the total mass of the adhesive, the cross-linking agent accounts for 1-3% of the total mass of the adhesive, and the water accounts for 40-50% of the total mass of the adhesive.
The preparation step of the NVH adjustment layer comprises the following steps: and (3) the raw material of the NVH adjusting layer is subjected to a needling process to form an NVH fluffy layer with air holes. The needling process may use needling processes conventional in the art. Preferably, the NVH fluffy layer has a thickness of 3-5 mm.
The hot press molding step of the NVH adjusting layer is carried out after the second step; the hot press molding step of the NVH adjusting layer specifically comprises the following steps: and (3) attaching the NVH fluffy layer on the sheet formed in the second step, performing a secondary hot pressing process, and then performing a cooling process to form the final NVH adjusting layer.
The secondary hot pressing process may use a hot pressing process conventional in the art. The upper die temperature of the die in the secondary hot pressing process is 150-180 ℃; the temperature of the lower die may be room temperature.
The NVH adjusting layer in the finally obtained sheet after the hot pressing process and the cooling process is preferably 0.5mm to 0.8mm in thickness.
The present invention provides an engine intake pipe, comprising: a sheet as described above.
In some embodiments, the engine air intake is made from sheet material as described above.
According to the invention, the phase change material in the air inlet pipe can be regulated based on the use area and the use temperature of the vehicle, the phase change material with higher melting point is used in the area with higher temperature, the content of the phase change material in the air inlet pipe is regulated to be higher, and the phase change material with lower melting point is used in the area with lower temperature, and the content of the phase change material in the air inlet pipe is regulated to be lower.
The present invention provides the use of a sheet as described above.
On the basis of conforming to the common knowledge in the field, the preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the invention.
The reagents and materials used in the present invention are commercially available.
The invention has the positive progress effects that: the phase change material is dispersed in the air inlet pipe of the sheet material, so that the temperature of the air inlet entering the engine through the air inlet pipe of the engine is kept within a certain temperature range, thereby being beneficial to the full combustion of fuel in the engine, improving the fuel efficiency of the engine, increasing the torque of the engine, providing comfortable driving feeling for a driver and reducing the overall maintenance cost of the vehicle of a customer. In addition, the content of the low-melting-point fibers in the first material layer and the sixth material layer of the sheet is improved, and the specific hot-pressing cooling forming technology is used for forming the coating film of the low-melting-point fibers, so that the problem that the air inlet pipe bulges in the using process and the problem that the phase-change material is gradually lost along with time are solved, and the durability is improved. Further, by matching the NVH adjusting layer on the outermost layer of the upper part of the sheet, the air inlet pipe can keep excellent thermal breaking resistance and has better sound absorption and vibration prevention effects.
Detailed Description
The present invention is further illustrated by way of examples below, but is not thereby limited to the scope of the examples described, but is capable of numerous modifications and variations by those skilled in the art without departing from the spirit and scope of the present application.
The experimental methods, in which specific conditions are not noted in the following examples, were selected according to conventional methods and conditions, or according to the commercial specifications.
Example 1
Preparing a first solution comprising a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at 50 ℃, and the content ratio of the solution is 40% of paraffin, 17% of the adhesive, 3% of the cross-linking agent and 40% of the water in sequence according to the mass ratio.
The sheet material was impregnated and dried by adding the raw material of the sheet and a moisture absorbent to the prepared first solution containing the phase change material and subjecting to moisture absorption drying at 50 ℃.
The sheet material comprises the following raw materials: a first material layer comprising PET and low melting point fibers; a second material layer comprising PP/PE, PET and low melting point fibers; a third material layer comprising a PP spunbond layer; a fourth material layer comprising PP/PE, PET and low melting point fibers; a fifth material layer comprising PET and low melting point fibers, and a sixth material layer comprising PP/PE, PET and low melting point fibers; the first material layer is sequentially stacked to the sixth material layer, and the content of the low-melting-point fibers in the first material layer is 40% by mass ratio; the content of the low-melting-point fiber in the sixth material layer was 40% by mass.
After the above impregnation and moisture absorption drying of the sheet raw material, particles of paraffin wax are uniformly dispersed therein to obtain an impregnated and dried sheet material.
After heating the sheet material, the sheet material was subjected to hot press molding by a compression molding die (the temperature of the upper die corresponding to the die of the first material layer was 200 ℃ C., the temperature of the lower die corresponding to the sixth material layer was 160 ℃ C.), and cooled to obtain a product sheet. In the product sheet, paraffin particles are uniformly dispersed in the second material layer to the fifth material layer after hot pressing, a part of the original dispersed paraffin particles in the first material layer and the sixth material layer are lost, a part of the original dispersed paraffin particles enter the second material layer to the fifth material layer, and finally, the upper and lower outermost layers of the sheet are coating films formed by melting PET and low-melting-point fibers, and paraffin particles are hardly contained. The final product sheet of this example had a paraffin wax content of 5% by mass.
Example 2
Preparing a first solution comprising a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at the temperature of 70 ℃, and the content ratio of the solution is 50% of the paraffin, 19% of the adhesive, 1% of the cross-linking agent and 30% of the water in sequence according to the mass ratio.
The raw material of the sheet and the moisture absorbent are added to the prepared first solution containing the phase change material, and subjected to moisture absorption drying at a temperature of 70 ℃ to obtain an impregnated and dried sheet material.
The sheet material comprises the following raw materials: a first material layer comprising PET and low melting point fibers; a second material layer comprising PP/PE, PET and low melting point fibers; a third material layer comprising a PP spunbond layer; a fourth material layer comprising PP/PE, PET and low melting point fibers; a fifth material layer comprising PET and low melting point fibers, and a sixth material layer comprising PP/PE, PET and low melting point fibers; the first material layer is sequentially stacked to the sixth material layer, and the content of the low-melting-point fibers in the first material layer is 60% by mass ratio; the content of the low-melting-point fiber in the sixth material layer was 60% by mass.
After the above impregnation and moisture absorption drying of the sheet raw material, particles of paraffin wax are uniformly dispersed therein to obtain an impregnated and dried sheet material.
After heating the sheet material, the sheet material was subjected to hot press molding by a compression molding die (the temperature of the upper die corresponding to the die of the first material layer was 200 ℃ C., the temperature of the lower die corresponding to the sixth material layer was 160 ℃ C.), and cooled to obtain a product sheet. In the product sheet, paraffin particles are uniformly dispersed in the second material layer to the fifth material layer after hot pressing, after the hot pressing process, a part of the originally dispersed paraffin particles in the first material layer and the sixth material layer are lost, a part of the originally dispersed paraffin particles enter the second material layer to the fifth material layer, and finally, the upper and lower outermost layers of the sheet are coating films formed by melting PET and low-melting-point fibers, and paraffin particles are hardly contained. The final product sheet of this example had a paraffin wax content of 20% by mass.
Example 3
Preparing a first solution comprising a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at 58 ℃, and the content ratio of the paraffin to the adhesive to the cross-linking agent to the water is 45% in sequence and 35% in the solution according to the mass ratio.
The sheet material was impregnated and dried by adding the raw material and a moisture absorbent to the prepared first solution containing the phase change material and subjecting to moisture absorption drying at 58 ℃.
The sheet material comprises the following raw materials: a first material layer comprising PET and low melting point fibers; a second material layer comprising PP/PE, PET and low melting point fibers; a third material layer comprising a PP spunbond layer; a fourth material layer comprising PP/PE, PET and low melting point fibers; a fifth material layer comprising PET and low melting point fibers, and a sixth material layer comprising PP/PE, PET and low melting point fibers; the first material layer is sequentially stacked to the sixth material layer, and the content of the low-melting-point fibers in the first material layer is 50% by mass ratio; the content of the low-melting-point fiber in the sixth material layer is 50% by mass ratio.
After the above impregnation and moisture absorption drying of the sheet raw material, particles of paraffin wax are uniformly dispersed therein to obtain an impregnated and dried sheet material.
After heating the sheet material, the sheet material was subjected to hot press molding by a compression molding die (the temperature of the upper die corresponding to the die of the first material layer was 200 ℃ C., the temperature of the lower die corresponding to the sixth material layer was 160 ℃ C.), and cooled to obtain a product sheet. In the product sheet, paraffin particles are uniformly dispersed in the second material layer to the fifth material layer after hot pressing, after the hot pressing process, a part of the originally dispersed paraffin particles in the first material layer and the sixth material layer are lost, a part of the originally dispersed paraffin particles enter the second material layer to the fifth material layer, and finally, the upper and lower outermost layers of the sheet are coating films formed by melting PET and low-melting-point fibers, and paraffin particles are hardly contained. The final product sheet of this example had a paraffin wax content of 12% by mass.
Example 4
Preparing a first solution comprising a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at 50 ℃, and the content ratio of the solution is 45% of paraffin, 18% of adhesive, 2% of cross-linking agent and 35% of water according to the mass ratio.
The sheet material was impregnated and dried by adding the raw material of the sheet and a moisture absorbent to the prepared first solution containing the phase change material and subjecting to moisture absorption drying at 50 ℃.
The sheet material comprises the following raw materials: a first material layer comprising PET and low melting point fibers; a second material layer comprising PP/PE, PET and low melting point fibers; a third material layer comprising a PP spunbond layer; a fourth material layer comprising PP/PE, PET and low melting point fibers; a fifth material layer comprising PET and low melting point fibers, and a sixth material layer comprising PP/PE, PET and low melting point fibers; the first material layer is sequentially stacked to the sixth material layer, and the content of the low-melting-point fibers in the first material layer is 50% by mass ratio; the content of the low-melting-point fiber in the sixth material layer is 50% by mass ratio.
After the above impregnation and moisture absorption drying of the sheet raw material, particles of paraffin wax are uniformly dispersed therein to obtain an impregnated and dried sheet material.
After heating the sheet material, the sheet material was subjected to first hot press molding by a compression molding die (the temperature of the upper die corresponding to the die of the first material layer was 200 ℃ C., the temperature of the lower die corresponding to the sixth material layer was 160 ℃ C.), and cooled to obtain a product sheet. In the product sheet, paraffin particles are uniformly dispersed in the second material layer to the fifth material layer after hot pressing, and after the hot pressing process, a part of the originally dispersed paraffin particles in the first material layer and the sixth material layer is lost, and a part of the originally dispersed paraffin particles enter the second material layer to the fifth material layer. The upper and lower outermost layers of the sheet after the first hot press molding are coating films formed by melting PET and low-melting-point fibers, and almost no paraffin particles are contained.
Preparing a second solution containing a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at 50 ℃, and the content ratio of the solution is 35% paraffin, 18% adhesive, 2% cross-linking agent and 45% water in sequence according to the mass ratio.
Immersing the raw material of the NVH adjusting layer containing 80% of PET and 20% of low-melting-point fibers (the ratio of the PET to the low-melting-point fibers is calculated according to the mass ratio) in the prepared second solution containing the phase change material, and carrying out moisture absorption drying at the temperature of 50 ℃ to uniformly disperse the phase change material in the raw material of the NVH adjusting layer. Next, the raw material of the NVH adjusting layer containing the phase change material was subjected to a needling process to form an NVH bulk layer having air holes, the thickness of the NVH bulk layer being 3mm. The NVH fluffy layer is attached to the uppermost layer (the side corresponding to the first material layer) of the sheet after the first hot press molding, and then the sheet is subjected to a second hot press molding process (the upper die temperature corresponding to the uppermost layer of the sheet is 150 ℃, the lower die temperature is room temperature) and is cooled to form a final sheet, wherein the NVH adjusting layer is formed on the uppermost layer of the sheet, and the thickness of the NVH adjusting layer is 0.5mm.
The final product sheet of this example had a paraffin wax content of 12% by mass.
Example 5
Preparing a first solution comprising a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at 50 ℃, and the content ratio of the solution is 50% of the paraffin, 19% of the adhesive, 1% of the cross-linking agent and 30% of the water according to the mass ratio.
The sheet material was impregnated and dried by adding the raw material of the sheet and a moisture absorbent to the prepared first solution containing the phase change material and subjecting to moisture absorption drying at 50 ℃.
The sheet material comprises the following raw materials: a first material layer comprising PET and low melting point fibers; a second material layer comprising PP/PE, PET and low melting point fibers; a third material layer comprising a PP spunbond layer; a fourth material layer comprising PP/PE, PET and low melting point fibers; a fifth material layer comprising PET and low melting point fibers, and a sixth material layer comprising PP/PE, PET and low melting point fibers; the first material layer is sequentially stacked to the sixth material layer, and the content of the low-melting-point fibers in the first material layer is 60% by mass ratio; the content of the low-melting-point fiber in the sixth material layer was 60% by mass.
After the above impregnation and moisture absorption drying of the sheet raw material, particles of paraffin wax are uniformly dispersed therein to obtain an impregnated and dried sheet material.
After heating the sheet material, the sheet material was subjected to first hot press molding by a compression molding die (the temperature of the upper die corresponding to the die of the first material layer was 200 ℃ C., the temperature of the lower die corresponding to the sixth material layer was 160 ℃ C.), and cooled to obtain a product sheet. In the product sheet, paraffin particles are uniformly dispersed in the second material layer to the fifth material layer after hot pressing, and after the hot pressing process, a part of the originally dispersed paraffin particles in the first material layer and the sixth material layer is lost, and a part of the originally dispersed paraffin particles enter the second material layer to the fifth material layer. The upper and lower outermost layers of the sheet after the first hot press molding are coating films formed by melting PET and low-melting-point fibers, and almost no paraffin particles are contained.
Preparing a second solution containing a phase change material: the paraffin, the adhesive, the cross-linking agent and the water are put into a raw material tank and are uniformly mixed at 50 ℃, and the content ratio of the solution is 40% of paraffin, 19% of the adhesive, 1% of the cross-linking agent and 40% of the water in sequence according to the mass ratio.
Immersing the raw material of the NVH adjusting layer containing 80% of PET and 20% of low-melting-point fibers (the ratio of the PET to the low-melting-point fibers is calculated according to the mass ratio) in the prepared second solution containing the phase change material, and carrying out moisture absorption drying at the temperature of 50 ℃ to uniformly disperse the phase change material in the raw material of the NVH adjusting layer. Then, the raw material of the NVH adjusting layer containing the phase-change material is subjected to a needling process to form an NVH fluffy layer with air holes, wherein the thickness of the NVH fluffy layer is 5mm. The NVH fluffy layer is attached to the uppermost layer (the side corresponding to the first material layer) of the sheet after the first hot press molding, and then the sheet is subjected to a second hot press molding process (the upper die temperature corresponding to the uppermost layer of the sheet is 180 ℃, the lower die temperature is room temperature), and the sheet is cooled to form a final sheet, wherein the NVH adjusting layer is formed on the uppermost layer of the sheet, and the thickness of the NVH adjusting layer is 0.8mm.
The final product sheet of this example had a paraffin wax content of 20% by mass.
Effect examples
An air intake duct in which the product sheets produced by the above examples 1 to 5 were bent into a tube shape was used, and this air intake duct was subjected to a heat insulating effect test and an NVH test.
The insulation effect test is tested by instruments and methods commonly used in the art. According to the invention, the temperature sensor is arranged at the inlet of the air inlet pipe of the vehicle to measure the air temperature at the air inlet, the temperature sensor is arranged at the inlet of the pressure stabilizing groove of the engine of the vehicle to measure the air temperature at the inlet of the pressure stabilizing groove, and the heat insulation effect of the air inlet pipe is detected by comparison.
Project Ambient temperature/. Degree.C Air temperature at the air intake/°c Air temperature/°c at the inlet of the surge tank
Example 1 25 40 41.5
Example 2 38 59 61
Example 3 30 48 49.3
Example 4 25 40 41.0
Example 5 25 40 40.7
Here, the correlation between the intake air temperature change and the fuel efficiency and the power performance will be described in detail. The correlation between intake air temperature and fuel efficiency is as follows: the engine fuel efficiency is reduced by 1% and the engine torque is reduced by 3% for every 10 c increase in the engine intake temperature.
When the intake air temperature increases, the knocking ignition timing is advanced and the oxygen content in the quantitative volume is also reduced, thus affecting the engine fuel efficiency. The intake air temperature rises and accordingly the engine torque decreases. When the intake air temperature is very low (the intake air temperature is less than 25 ℃), the torque is also reduced, so that the intake air temperature is kept in a stable range, heat generated by the engine is prevented from being transmitted to the intake air in the intake pipe, the intake air temperature at the inlet of the intake pipe and the intake air temperature entering the engine are kept unchanged as much as possible, and the fuel efficiency of the engine and the torque are improved.
The torque change is calculated by the following equation: (atmospheric pressure is in kpa and suction temperature is in DEG C)
Torque= (99.06/atm-water vapour partial pressure) 1.2 X (suction temperature +273/298) 0.6
NVH testing can be performed by instruments and methods commonly used in the art. In the present invention, an LMS (company) test apparatus and LMS test software are used to perform NVH test, specifically, a test microphone 1 is provided at a distance of 100mm from the outside of a tube, a microphone 2 is provided at the front of a vehicle interior, and data read by each microphone is measured at a full throttle (0 rpm to 6000 rpm) according to a vehicle acceleration test method.
Figure BDA0002255067150000121
Figure BDA0002255067150000131
As can be seen from the above embodiments and the effect embodiments, the intake pipe using the sheet of the present invention has phase change material dispersed therein, so that the temperature of the intake air entering the engine through the engine intake pipe is maintained within a certain temperature range, thereby facilitating the sufficient combustion of fuel in the engine, improving the fuel efficiency of the engine and increasing the torque of the engine, thereby providing a comfortable driving feeling to the driver and reducing the overall maintenance cost of the vehicle for the customer. In addition, the content of the low-melting-point fibers in the first material layer and the sixth material layer of the sheet is improved, and the specific hot-pressing cooling forming technology is used for forming the coating film of the low-melting-point fibers, so that the problem that the air inlet pipe bulges in the using process and the problem that the phase-change material is gradually lost along with time are solved, and the durability is improved. Further, by matching the NVH adjusting layer on the outermost layer of the upper part of the sheet, the air inlet pipe can keep excellent thermal breaking resistance and has better sound absorption and vibration prevention effects.

Claims (21)

1. A sheet for an intake pipe of an engine, characterized in that the sheet comprises:
a first material layer comprising PET and low melting point fibers;
a second material layer comprising PP/PE, PET and low melting point fibers;
a third material layer comprising a PP spunbond layer;
a fourth material layer comprising PP/PE, PET and low melting point fibers;
a fifth material layer comprising PET and low melting point fibers;
a sixth material layer comprising PP/PE, PET and low melting point fibers;
wherein the PP/PE is a plastic material composed of polypropylene and polyethylene, and particles of the phase change material are dispersed in the second material layer, the third material layer, the fourth material layer and the fifth material layer; the melting point of the phase change material is within the range of 47-65 ℃, the content of the low-melting-point fiber in the first material layer is 30-60% by mass, and the content of the low-melting-point fiber in the sixth material layer is 30-60% by mass.
2. The sheet for an engine intake of claim 1, wherein the phase change material comprises: paraffin wax.
3. The sheet for an intake pipe of an engine according to claim 1, wherein the content of the phase change material in the sheet is 5 to 20% by mass.
4. The sheet for an engine intake of claim 1, wherein the sheet further comprises an NVH adjusting layer; the NVH adjusting layer is formed on the outer side of the first material layer; the NVH adjustment layer comprises: PET and low melting point fibers.
5. The sheet for an engine intake pipe according to claim 4, wherein the content of the PET in the NVH adjusting layer is 70 to 90% by mass, and the content of the low-melting fiber is 10 to 30% by mass.
6. The sheet for an engine intake of claim 4, wherein particles of the phase change material are dispersed in the NVH regulating layer.
7. The sheet for an engine intake of claim 4, wherein the NVH adjusting layer has a thickness of 0.5mm to 0.8mm.
8. A method of producing a sheet for an intake pipe of an engine, the method comprising:
a first step in which a sheet raw material is immersed in a first solution containing a phase change material, and subjected to moisture absorption and drying to obtain an immersed and dried sheet material; wherein the sheet raw material comprises: the first material layer, the second material layer, the third material layer, the fourth material layer, the fifth material layer, and the sixth material layer of claim 1;
a second step in which the impregnated and dried sheet material is subjected to a hot pressing process and a cooling process, obtaining the final sheet.
9. The method of manufacturing of claim 8, wherein the phase change material comprises: paraffin wax.
10. The method of preparing of claim 8, wherein the first solution comprising a phase change material comprises: paraffin wax, adhesive, cross-linking agent and water; the paraffin wax accounts for 40-50% of the total mass of the adhesive, the adhesive accounts for 17-19% of the total mass of the adhesive, the cross-linking agent accounts for 1-3% of the total mass of the adhesive, and the water accounts for 30-40% of the total mass of the adhesive.
11. The method of claim 10, wherein the first solution comprising the phase change material is prepared by mixing the paraffin wax, the binder, the cross-linking agent, and water at a temperature of 50 ℃ to 70 ℃.
12. The method according to claim 8, wherein in the first step, the process of impregnation and moisture absorption drying is operated at a temperature of 50 to 70 ℃.
13. The method of manufacturing according to claim 8, wherein in the second step, the hot pressing process includes the steps of: and heating the sheet material, introducing the sheet material into a die for compression molding, wherein the temperature of an upper die of the die corresponding to the first material layer is 200-220 ℃, and the temperature of a lower die corresponding to the sixth material layer is 140-180 ℃.
14. The method of manufacturing of claim 8, further comprising an NVH adjusting layer forming step comprising: a preparation step of NVH adjusting layer and a hot press molding step.
15. The method of manufacturing of claim 14, wherein the raw materials of the NVH regulating layer comprise: PET and low melting point fibers.
16. The method of manufacturing according to claim 14, wherein the raw material of the NVH adjusting layer is immersed in the second solution containing the phase change material before the preparing step and the hot press forming step, and the phase change material is dispersed in the raw material of the NVH adjusting layer by moisture absorption and drying.
17. The method of manufacturing of claim 16, wherein the second solution containing the phase change material comprises, when impregnating the raw material of the NVH adjusting layer: paraffin wax, adhesive, cross-linking agent and water; the paraffin wax accounts for 30-40% of the total mass of the adhesive, the adhesive accounts for 17-19% of the total mass of the adhesive, the cross-linking agent accounts for 1-3% of the total mass of the adhesive, and the water accounts for 40-50% of the total mass of the adhesive.
18. The method of preparing as claimed in claim 14, wherein the preparing of the NVH adjusting layer comprises: and (3) the raw material of the NVH adjusting layer is subjected to a needling process to form an NVH fluffy layer with air holes.
19. The method of manufacturing according to claim 18, wherein the step of hot press forming the NVH adjusting layer is performed after the second step; the hot press molding step of the NVH adjusting layer specifically comprises the following steps: and (3) attaching the NVH fluffy layer on the sheet formed in the second step, performing a secondary hot pressing process, and then performing a cooling process to form the final NVH adjusting layer.
20. The method of claim 19, wherein the upper mold temperature of the mold is 150 ℃ to 180 ℃ during the secondary hot pressing.
21. The engine intake pipe, its characterized in that, the engine intake pipe includes: the sheet according to any one of claims 1 to 7.
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CN102587149A (en) * 2011-12-31 2012-07-18 齐德生 Composite non-woven fabric
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JP2018159360A (en) * 2017-03-23 2018-10-11 イビデン株式会社 Intake system hose

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US20110284189A1 (en) * 2010-05-24 2011-11-24 Sumontro Sinha Reusable high temperature thermal protection system

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CN102587149A (en) * 2011-12-31 2012-07-18 齐德生 Composite non-woven fabric
CN102717558A (en) * 2012-07-04 2012-10-10 北京汽车股份有限公司 Environment-friendly vehicle natural fiber composite material and preparation method as well as application thereof
CN104593948A (en) * 2013-10-30 2015-05-06 3M创新有限公司 Method for manufacturing fluffy temperature-regulating warm-keeping material and fluffy temperature-regulating warm-keeping material
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