CN208085165U - A kind of bireflectance noise reduction heat-insulating composite panel - Google Patents

Abstract

The utility model discloses a double-reflection noise-reducing and heat-insulating composite board. The noise-reducing and heat-insulating composite board is sequentially composed of a first aluminum foil layer, a hard polyurethane layer, a second aluminum foil layer, a soft polyurethane layer and Decorative layer composition. The double-reflection noise-reducing and heat-insulating composite board provided by the utility model has excellent overall noise-reducing and heat-insulating performance, can fully meet the use requirements of automobiles for noise-reducing and heat-insulating, and has extremely strong practical value.

Description

A double reflection noise reduction and heat insulation composite board

technical field

The utility model relates to a noise-reducing and heat-insulating composite board, in particular to a double-reflection noise-reducing and heat-insulating composite board applicable to the inner roof of an automobile, which belongs to the technical field of automobile heat insulation.

Background technique

With the rapid development of social science and technology, people have higher and higher requirements on the performance of automobiles, such as heat insulation and noise reduction of automobiles. The heat insulation and noise reduction of the car seriously affect the comfort of the car. If the heat insulation of the car is poor, then in the hot summer, the heat outside the car will be quickly transferred to the inside of the car, causing the temperature inside the car to rise rapidly. High, not only seriously affects the comfort of the car but also may have a certain impact on safe driving; on the contrary, in the cold winter, the heat inside the car is quickly transferred to the outside of the car, and it usually takes a long time to turn on the air conditioner to reduce the temperature inside the car. Maintaining a certain suitable temperature and turning on the air conditioner for a long time will inevitably cause waste of energy and damage to the environment. At the same time, if the noise reduction performance of the car is poor, the noise will be louder during the use of the car, which will inevitably produce noise pollution and seriously affect people's physical and mental health. Therefore, it is usually necessary to use noise-reducing and heat-insulating materials that suppress noise while also suppressing the flow of heat, so that the temperature inside the car can maintain a certain stability, so as to improve the comfort of the car.

However, traditional noise reduction and heat insulation materials used in the automotive field are usually single materials such as glass fibers, asbestos products, felts, ceramics, polyester foam boards, and aluminum foils. Noise reduction and heat insulation requirements for automobiles.

In order to further improve the noise reduction and heat insulation performance of automobiles, composite noise reduction and heat insulation materials are currently used in automobiles. At present, the composite noise reduction and heat insulation materials commonly used in automobiles mainly include the following types:

1) Lightweight GMT, that is: long glass fiber reinforced polypropylene thermoplastic composite material: GMT materials have been widely used in the automotive industry abroad since the 1990s. The lightweight GMT structure from top to bottom is fabric, film, Semi-finished products, adhesive films, and non-woven fabrics are widely used in automotive interior ceilings, door partitions, noise shields, and luggage racks due to their high strength, good sound-absorbing performance, superior molding performance, and recyclability; although light The quality GMT structure has the above advantages, but the thermal conductivity of the overall composite material is relatively high, and the thermal insulation performance is lacking;

2) Glass fiber/polyurethane (PU) foam composite material: This composite material is mainly used for car roofs. The composite material is mainly composed of a decorative layer and a base material, and is compositely formed by hot pressing. The decorative layer faces passengers. Commonly used materials It is knitted fabric, non-woven fabric, PVC, etc.; the substrate can be divided into PU foam board, PP fiber board and hemp fiber board, etc. Among them, the PU foam board not only meets the basic performance of the car roof in terms of temperature resistance, mildew resistance, and strength. requirements, and has better heat insulation and sound absorption performance than hemp fiber type and PP fiberboard type, and is more commonly used in car roofs; although this composite material has good heat insulation performance, it only combines some Simple superposition of materials with low thermal conductivity, the overall heat insulation performance is still lacking, and the sound absorption and noise reduction performance is weak;

3) Aluminum foil composite material: this kind of composite material mainly combines aluminum foil paper or cloth with other heat insulation and noise reduction materials, for example: sequentially includes foam rubber and plastic material layer, polyurethane layer, glass fiber aluminum foil cloth (patent CN201020505588.3 ) composite material; sequentially composed of aluminum foil layer, glass cloth layer and flame-retardant acetic acid modified polyethylene foam material layer through high-temperature bonding composite material (patent CN201420210129.0); sequentially composed of single-layer aluminum foil, PE film layer and semi-cured felt layer (patent CN201420460064.5); composite fabric layer composed of non-woven fabric layer, reticular aluminum foil layer, bamboo charcoal fiber layer, anti-ultraviolet fabric layer (patent CN201621024784.2), etc. The above-mentioned composite fabrics are mainly composed of foam materials or cloths with sound-absorbing and noise-reducing functions and aluminum foils with small thermal conductivity or reflective effects, so that the formed composite materials have noise-reducing and heat-insulating properties. However, the above-mentioned composite materials are still used. Various materials are simply superimposed, and the overall noise reduction and heat insulation performance of the material is still lacking, which cannot well meet the needs of use.

Contents of the invention

Aiming at the above-mentioned problems in the prior art, the purpose of this utility model is to provide a double-reflection noise-reducing and heat-insulating composite panel applicable to the inner roof of automobiles, so as to meet the needs of noise-reducing and heat-insulating vehicles.

In order to achieve the above object, the utility model adopts the following technical solutions:

A double-reflection noise-reducing and heat-insulating composite board is composed of a first aluminum foil layer, a hard polyurethane layer, a second aluminum foil layer, a soft polyurethane layer and a decorative layer from top to bottom.

As a preferred solution, the thermal conductivity of the first aluminum foil layer and the second aluminum foil layer are both ≦0.1W/(°C.m).

As a preferred solution, the thermal conductivity of the rigid polyurethane layer is ≦0.03W/(°C.m).

As a preferred solution, the decorative layer is non-woven fabric.

As a preferred solution, the total thickness of the first aluminum foil layer, the hard polyurethane layer and the second aluminum foil layer is greater than the total thickness of the soft polyurethane layer and the decorative layer.

As a further preferred solution, the ratio of the total thickness of the first aluminum foil layer, the hard polyurethane layer and the second aluminum foil layer to the total thickness of the soft polyurethane layer and the decorative layer is 1:1-3:1.

As a preferred solution, the total thickness of the noise reduction and heat insulation composite board is 6-10mm.

Compared with the prior art, the beneficial technical effect of the utility model lies in:

The noise-reducing and heat-insulating composite panel provided by the utility model is composed of a first aluminum foil layer, a hard polyurethane layer, a second aluminum foil layer, a soft polyurethane layer and a decorative layer from top to bottom, wherein the first aluminum foil layer, the hard polyurethane The polyurethane layer and the second aluminum foil layer constitute the heat insulation layer, the soft polyurethane layer and the decorative layer constitute the noise reduction layer, and the compounding of the multi-layer materials makes the composite board as a whole have noise reduction and heat insulation performance; and, the heat insulation layer of the utility model not only It is only a simple superposition of aluminum foil with low thermal conductivity and rigid polyurethane material, but uses double aluminum foil layers with heat-reflecting effect to form a heat-insulating interlayer, so that the composite board has two-way heat radiation reflection and moisture-proof performance on the basis of heat insulation , which further enhances the overall thermal insulation performance of the material; especially, for the composite board of the present invention, the laminate of multi-layer composite boards increases the thermal conductivity along the heat transfer direction as a whole. Compared with the traditional simple stacking, It can give full play to the synergistic effect between the materials of each layer, so that the overall noise reduction and heat insulation of the composite board is excellent, which can fully meet the needs of automobile noise reduction and heat insulation, has strong practical value, and is worthy of wide application.

Description of drawings

Fig. 1 is a schematic structural view of a double-reflection, noise-reducing and heat-insulating composite panel provided by an embodiment of the present invention;

The symbols in the figure are indicated as follows: 1-first aluminum foil layer; 2-hard polyurethane layer; 3-second aluminum foil layer; 4-soft polyurethane layer; 5-decorative layer.

Detailed ways

The technical solutions of the present utility model will be further clearly and completely described below in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figure 1: a double-reflection noise-reducing and heat-insulating composite board provided by the utility model, the noise-reducing and heat-insulating composite board is sequentially composed of a first aluminum foil layer 1, a hard polyurethane layer 2, a second The aluminum foil layer 3, the soft polyurethane layer 4 and the decorative layer 5 are composed.

Among them: the first aluminum foil layer 1, the hard polyurethane layer 2 and the second aluminum foil layer 3 constitute the heat insulation layer, the soft polyurethane layer 4 and the decorative layer 5 constitute the noise reduction layer, and the compounding of the materials of each layer makes the composite board as a whole have noise reduction Heat insulation performance, as can be seen from Figure 1, the heat insulation layer is provided with aluminum foil layers on the front and back sides of the rigid polyurethane layer 2 to form a double aluminum foil interlayer. Reflective heat radiation performance, combining heat insulation and reflective heat radiation into one, enhances heat insulation performance, on the other hand, makes the composite board have moisture-proof performance, can reduce the adverse effect of humidity on the thermal conductivity, and further guarantees the overall insulation of the composite board Thermal performance; while the traditional aluminum foil composite board usually only has one layer of aluminum foil layer, and usually one side or both sides of the aluminum foil layer are equipped with other materials with low thermal conductivity, which does not have the effect of heat insulation interlayer, or , even if an interlayer is formed, other materials form an interlayer on the aluminum foil, so it does not have the bidirectional heat radiation reflection performance and moisture-proof performance of the present application, and the overall heat insulation performance is far inferior to the present application.

In addition, it can be seen from Fig. 1 that the first aluminum foil layer 1, the hard polyurethane layer 2, the second aluminum foil layer 3, the soft polyurethane layer 4 and the decorative layer 5 are sequentially composited from top to bottom, and the materials of each layer All belong to materials with small thermal conductivity, but generally speaking, the lamination of each layer of material has a certain directionality. Comply with the law of heat transfer.

Among them: the first aluminum foil layer 1, the rigid polyurethane layer 2 and the second aluminum foil layer 3 form a heat insulation layer, and the first aluminum foil layer 1 and the second aluminum foil layer 3 are selected with a thermal conductivity≦0.1W/(°C.m) aluminum foil material, the rigid polyurethane layer 2 is selected from a rigid polyurethane material with a thermal conductivity≦0.03W/(°C.m) to further reduce the thermal conductivity of the heat insulation layer and increase the overall thermal insulation of the composite board.

The decorative layer 5 can be a plate or a cloth. In this embodiment, the decorative layer 5 is made of non-woven fabric, and the non-woven fabric combined with the porous polyurethane layer 4 can further enhance the overall noise reduction performance of the composite board.

The first aluminum foil layer 1, the hard polyurethane layer 2 and the second aluminum foil layer 3 form a heat insulation layer, and the soft polyurethane layer 4 and the decorative layer 5 form a noise reduction layer, wherein: the first aluminum foil layer 1, the hard polyurethane layer 2 and The total thickness of the second aluminum foil layer 3 (that is, the thickness of the heat insulation layer) is greater than the total thickness of the soft polyurethane layer 4 and the decorative layer 5 (that is, the noise reduction layer). The ratio of the total thickness of the soft polyurethane layer 2 and the second aluminum foil layer 3 to the total thickness of the soft polyurethane layer 4 and the decorative layer 5 is 1:1-3:1, so as to achieve the best performance of the overall heat insulation and noise reduction of the board. balance.

The total thickness of the noise-reducing and heat-insulating composite board is 6-10mm, and on the basis of ensuring noise-reducing and heat-insulating, the use of materials is minimized, thereby saving costs.

When the double-reflection, noise-reducing and heat-insulating composite board is used in the interior of a car, the decorative layer 5 is facing the inside of the car cabin.

The double-reflection, noise-reducing and heat-insulating composite panel described in the utility model has a manufacturing process as follows:

First complete the constant pressure rigid polyurethane foam material to form the rigid polyurethane layer 2, and then lay aluminum foil films on the upper and lower sides of the mold to complete the constant pressure, that is, form the first aluminum foil layer on the front and back sides of the rigid polyurethane layer 2 1 and the second aluminum foil layer 3 to obtain the rigid polyurethane foam material of the double-sided aluminum foil film, then place the rigid polyurethane foam material of the double-sided aluminum foil film flat on the bottom of the mould, and pave the soft polyurethane foam material on the top layer, The soft polyurethane layer 4 can be formed under constant pressure, and then the decorative material can be formed under constant pressure to form the decorative layer 5, and then the first aluminum foil layer 1, the hard polyurethane layer 2, the second aluminum foil layer 3, the soft polyurethane layer 3, and the soft polyurethane layer are obtained from top to bottom. A double-reflection, noise-reducing and heat-insulating composite board composed of a quality polyurethane layer 4 and a decorative layer 5.

The double-reflection noise-reducing and heat-insulating composite board prepared by the utility model can be cut and hot-pressed to form a shape suitable for the part to be used according to the use requirements. The double-reflection noise-reducing and heat-insulating composite board is cut and hot-pressed to obtain a noise-reducing and heat-insulating composite board suitable for the roof of an automobile.

It has been verified that the thermal conductivity of the double-reflection, noise-reducing and heat-insulating composite panel provided by the utility model can reach 0.04W/(°C.m), and it has excellent heat-insulating performance. When used as a car roof, compared with conventional polyurethane The foam board type roof can reduce the heat flow by at least 20% under the same solar radiation and material geometric characteristics, which can significantly improve the thermal comfort of the car passenger compartment and reduce the burden of the air conditioner in the car, which has obvious energy saving and reduction. In addition, due to the use of the porous material of the soft polyurethane layer 4, the composite board has better noise reduction performance. When used as a car roof, it can significantly reduce the noise when the car is in use, reduce noise pollution, and improve comfort. sex.

In summary, the double-reflection noise reduction and heat insulation composite panel provided by the utility model has excellent overall noise reduction and heat insulation performance, can fully meet the needs of automobile noise reduction and heat insulation, and has a simple structure, safety and environmental protection, and low cost. The invention has extremely strong practical value, is worthy of being widely popularized and applied, and has significant progress compared with the prior art.

Finally, it is necessary to point out that: the above is only a preferred specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field shall disclose Within the technical scope, easily conceivable changes or replacements shall be covered by the protection scope of the present utility model.

Claims (5)

1. A double-reflection noise-reducing and heat-insulating composite board, characterized in that: the noise-reducing and heat-insulating composite board consists of a first aluminum foil layer, a hard polyurethane layer, a second aluminum foil layer, and a soft polyurethane layer from top to bottom. and decorative layers. 2. The double-reflection noise reduction and heat insulation composite panel according to claim 1, characterized in that: the thermal conductivity of the first aluminum foil layer and the second aluminum foil layer are both ≦0.1W/(°C.m). 3. The double-reflection noise reduction and heat insulation composite panel according to claim 1, characterized in that: the thermal conductivity of the rigid polyurethane layer is ≦0.03W/(°C.m). 4. The double-reflection noise reduction and heat insulation composite panel according to claim 1, characterized in that: the decorative layer is non-woven fabric. 5. The double-reflection noise reduction and heat insulation composite panel according to claim 1, characterized in that: the total thickness of the first aluminum foil layer, the hard polyurethane layer and the second aluminum foil layer is greater than the total thickness of the soft polyurethane layer and the decorative layer .