High-flame-retardant composite fiber for automobile engine cover plate

Abstract

The utility model discloses a high-flame-retardant composite fiber for an automobile engine cover plate, which comprises an inner core layer and an outer core layer, the bonding layer is arranged on the outer surface of the flame-retardant fiber; and the flame-retardant layer is arranged on the outer surface of the bonding layer. According to the high-flame-retardant composite fiber for the automobile engine cover plate, the glass fiber is fixedly sleeved with the bonding layer, the glass fiber and the flame-retardant layer are fixedly connected through the bonding layer, meanwhile, the flame-retardant layer and the glass fiber have high flame retardance, the flame retardance of the composite fiber is enhanced, and the flame retardance of the composite fiber is improved through the inner core layer composed of the glass fiber. The light weight and high toughness of the overall structure of the composite fiber are ensured, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fiber, especially to a high flame-retardant composite fiber for automobile engine hood plate. BACKGROUND

[0002] The automobile engine generates high temperature when working, and the engine hood plate as a part of the engine compartment needs to withstand these high temperatures, prevent the engine hood plate from burning under high temperature, and also meet the heat insulation and anti-shrinkage, thereby improving the safety of the automobile.

[0003] The flame-retardant fiber in the prior art has simple structure and single function, which can meet part of the flame-retardant demand, but it is difficult to balance light weight and high toughness, resulting in limited service life.

[0004] Therefore, it is necessary to improve the flame-retardant fiber for automobile engine hood plate in the prior art. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the defects in the prior art, and provides a high flame-retardant composite fiber for automobile engine hood plate, which balances flame retardancy, light weight and high toughness.

[0006] To achieve the above technical effects, the technical scheme of the utility model is as follows: a high flame-retardant composite fiber for automobile engine hood plate, comprising:

[0007] An inner core layer, the inner core layer comprises glass fibers;

[0008] An adhesive layer, the adhesive layer is arranged on the outer surface of the inner core layer;

[0009] A flame-retardant layer, the flame-retardant layer is arranged on the outer surface of the adhesive layer.

[0010] Preferably, in order to ensure the high toughness of the composite fiber as a whole, the glass fibers are provided with at least two.

[0011] Preferably, in order to enhance the overall structural strength of the inner core layer formed after the connection of the glass fibers, the glass fibers are connected by mutual winding.

[0012] Preferably, in order to facilitate the enhancement of the toughness of the inner core layer, the axis of the glass fibers is an equidistant spiral line.

[0013] Preferably, in order to enhance the connection strength of the glass fibers and the adhesive layer, the outer surface of the glass fibers is a rough surface.

[0014] Preferably, in order to facilitate the formation of a rough surface on the outer surface of the glass fibers, the outer surface of the glass fibers is a rough surface etched by acid and alkali.

[0015] Preferably, in order to enhance the connection strength between the inner core layer and the flame-retardant layer, the adhesive layer is one of an epoxy resin layer, an acrylic layer and a hot melt adhesive layer.

[0016] Preferably, in order to reduce the thickness of the flame-retardant layer while ensuring the flame-retardant performance of the flame-retardant layer and the overall lightweight of the composite fiber, the flame-retardant layer is an intumescent flame-retardant layer.

[0017] In summary, compared with the prior art, the high flame-retardant composite fiber for the automobile engine hood plate of the utility model has the following advantages: the adhesive layer is fixedly sleeved outside the glass fiber, the glass fiber and the flame-retardant layer are fixedly connected by the adhesive layer, the flame-retardant layer and the glass fiber have high flame retardancy, the flame-retardant performance of the composite fiber is enhanced, the overall structure of the composite fiber is lightweight and high-toughness due to the inner core layer composed of the glass fiber, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the first embodiment of the utility model;

[0019] Figure 2 is a structural schematic view of the second embodiment of the utility model;

[0020] In the figure: 1, inner core layer; 11, glass fiber; 2, adhesive layer; 3, flame-retardant layer. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model will be further described below in combination with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.

[0022] First embodiment

[0023] As Figure 1 shown, the high flame-retardant composite fiber for the automobile engine hood plate of the first embodiment of the utility model comprises:

[0024] The inner core layer 1 comprises the glass fiber 11.

[0025] The adhesive layer 2 is arranged on the outer surface of the inner core layer 1.

[0026] The flame-retardant layer 3 is arranged on the outer surface of the adhesive layer 2.

[0027] In the high flame-retardant composite fiber of the embodiment, the glass fiber 11 is selected as the main component of the inner core layer 1, mainly based on the fact that the glass fiber 11 has certain toughness, toughness and lightness. First, the glass fiber 11 has good toughness, which is due to the internal gap spacing. These gaps enable the glass fiber 11 to absorb heat by stretching and deforming when subjected to external forces, thereby exhibiting high toughness. Second, the glass fiber 11 also has good flame-retardant properties, with a melting point of 680°C and a boiling point of 1000°C, which enables the glass fiber 11 to maintain structural stability in high-temperature environments. The flame-retardant properties of the glass fiber 11 also include its resistance to burning, the generation of smoke and toxic gases, etc. When a fire fault occurs in the engine of a vehicle, the composite fiber used on the engine cover plate can effectively organize the spread of the fire, thereby reducing the loss caused by the fire. Furthermore, as an inorganic non-metallic material, the glass fiber 11 has extremely low density, which enables it to maintain structural strength while having a relatively light weight, thereby facilitating the lightweight of the engine cover of the vehicle engine and meeting the various needs of the engine cover plate of the vehicle engine.

[0028] The adhesive layer 2 serves as an intermediate layer for firmly connecting the inner core layer 1 and the flame-retardant layer 3. The flame-retardant layer 3 serves as the outermost layer of the composite fiber of the embodiment and protects the inner core layer 1, providing the outermost layer with flame-retardant properties.

[0029] Further improvements include that the glass fiber 11 is provided with at least two.

[0030] With the above design, the number of glass fibers 11 in the inner core layer 1 is increased, which increases the structural strength and toughness of the inner core layer 1.

[0031] In the production of the composite limit of the embodiment, an adhesive layer 2 can be formed on the surface of the inner core layer 1 formed by the combination of the glass fibers 11, and then the flame-retardant layer 3 can be applied outside the adhesive layer 2, thereby firmly connecting the inner core layer 1 and the flame-retardant layer 3 through the adhesive layer 2. When the composite fiber is made in the above manner, the adhesive applied on the surface of the glass fiber 11 forms an adhesive layer 2 that can enhance the adhesion between the glass fiber 11 and the flame-retardant layer 3, making the flame-retardant layer 3 more firmly adhere to the outer surface of the glass fiber 11. Second, the flame-retardant layer 3 formed on the surface of the adhesive layer 2 can significantly improve the flame-retardant properties of the composite fiber. The flame-retardant layer 3 can effectively prevent the spread of fire, reduce the burning speed, and to some extent, inhibit the generation of smoke, thereby improving the flame-retardant properties and durability of the composite fiber of the embodiment and prolonging the service life.

[0032] Further improvements include that the adhesive layer 2 is an epoxy resin layer.

[0033] The adhesive layer 2 plays a crucial role in this embodiment, which needs to firmly bond the flame-retardant layer 3 and the glass fiber 11 together to ensure the overall performance of the composite fiber. The main production raw material of the adhesive layer 2 is epoxy resin, which is a commonly used adhesive for glass fiber 11, has good bonding strength and high temperature resistance, and has a slow curing rate, which can give enough operation time to connect the glass fiber 11 and the flame-retardant layer 3 during production.

[0034] Of course, as an alternative to similar effects, the adhesive layer 2 can also be an acrylic layer or a hot melt adhesive layer, among which the reaction speed of acrylic is faster, which can complete the curing reaction in a short time and quickly connect the flame-retardant layer 3 and the glass fiber 11 together to improve work efficiency; and the hot melt adhesive is a high-efficiency and fast bonding material, which is heated to a plastic state to increase its viscosity, and then the flame-retardant layer 3 is bonded on the surface, and after the hot melt adhesive cools to form the adhesive layer 2, the glass fiber 11 and the flame-retardant layer 3 can be quickly and conveniently bonded together.

[0035] Further improvement is that the flame-retardant layer 3 is an intumescent flame-retardant layer 3. Compared with other types of flame-retardant materials, the intumescent flame-retardant layer 3 can rapidly expand to form a porous carbon layer when heated, which can isolate oxygen and reduce the combustion temperature, and provide good flame-retardant effect at a lower coating thickness. Specifically, the intumescent flame-retardant layer 3 can physically expand at high temperature to form a carbon foam layer with a thickness of several tens of times or even hundreds of times of the original coating thickness. This carbon foam layer has good heat insulation effect and can effectively isolate heat transfer. Moreover, during the expansion process, the acid source, carbon source and gas source in the intumescent flame-retardant layer 3 will undergo a series of chemical reactions. The acid source decomposes to produce acidic substances, which promote the carbonization of the carbon source to form a carbon layer. The gas source decomposes to produce non-combustible gas, which makes the carbon layer expand and form a porous structure, enhancing the stability and heat insulation performance of the carbon layer, and further improving the flame-retardant performance. In addition, the carbon foam layer formed by expansion can also absorb a large amount of heat, reducing the combustion speed and flame propagation speed. Therefore, after selecting the intumescent flame-retardant layer 3 as the flame-retardant layer 3, the composite fiber has the advantages of efficient flame retardation, low smoke and low toxicity, light weight and high strength.

[0036] Second embodiment

[0037] As Figure 2 shown, the high flame-retardant composite fiber for the automobile engine hood plate of the second embodiment of the utility model is based on the first embodiment, and the difference is that the glass fibers 11 are connected by mutual entanglement.

[0038] Specifically, the axis of the glass fiber 11 is an equidistant spiral line. After the glass fibers 11 are connected by mutual winding, the structural toughness of the formed inner core layer 1 is increased, the bending deformation of the inner core layer 1 is facilitated, the service life is prolonged, and the overall surface roughness of the inner core layer 1 is increased to strengthen the connection strength between the inner core layer 1 and the adhesive layer 2.

[0039] Third embodiment

[0040] Without drawings, the high flame-retardant composite fiber for the automobile engine hood plate of the third embodiment of the utility model is based on the second embodiment, and the difference lies in that the outer surface of the glass fiber 11 is a rough surface.

[0041] Specifically, the outer surface of the glass fiber 11 is a rough surface etched by acid and alkali. By etching the oxide on the surface of the glass fiber 11, a concave and microporous structure is formed, so as to increase the surface roughness. Such a rough surface structure provides more physical bite points and forms a locking effect, thereby helping to increase the mechanical bonding force between the glass fiber 11 and the adhesive layer 2.

[0042] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the technical principles of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. A high flame retardant composite fiber for an automobile engine hood panel, characterized by, Comprise: An inner core layer (1) comprising glass fibers (11); An adhesive layer (2) disposed on the outer surface of the inner core layer (1); A flame-retardant layer (3) disposed on the outer surface of the adhesive layer (2).

2. The high flame retardant composite fiber for an automobile engine hood according to claim 1, characterized by: The glass fibers (11) are provided with at least two.

3. The high flame retardant composite fiber for an automobile engine hood according to claim 2, characterized by: The glass fibers (11) are connected to each other by winding.

4. The high flame retardant composite fiber for an automobile engine hood according to claim 3, characterized by: The axis of the glass fibers (11) is an equidistant spiral line.

5. The high flame resistant composite fiber for an automobile engine hood according to claim 1, characterized by: The outer surface of the glass fibers (11) is rough.

6. The high flame resistant composite fiber for an automobile engine hood according to claim 5, characterized by: The outer surface of the glass fibers (11) is a rough surface etched by acid and alkali.

7. The high flame retardant composite fiber for an automobile engine hood according to any one of claims 1 to 5, characterized by: The adhesive layer (2) is one of an epoxy resin layer, an acrylic layer, and a hot melt adhesive layer.

8. The high flame resistant composite fiber for an automobile engine hood according to any one of claims 1 to 5, characterized by: The flame-retardant layer (3) is an intumescent flame-retardant layer (3).

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