CN204431858U - A kind of anti-flammability lining of railway boxcar plate - Google Patents

Abstract

The utility model discloses a flame-retardant railway boxcar inner liner, which comprises an upper skin, a lower skin and a core board formed by hot pressing, the core board is located between the upper skin and the lower skin, and the upper skin surface is and the surface of the lower epidermis are provided with a flame retardant layer, the beneficial effect of the utility model: when using the railway box car inner liner with the structure of the utility model, not only can play the effect of anti-collision and flame retardant, but also in the manufacturing process , there will be no troubles in subsequent manufacturing caused by adding flame retardants to the production materials of the upper and lower skins.

Description

A kind of flame retardant railway boxcar lining board

technical field

The utility model relates to an inner lining board of a railway box car, in particular to a flame-retardant inner lining board of a railway box car.

Background technique

The railway boxcar is a kind of railway transport vehicle. The boxcar is composed of a bottom frame, a side wall frame and a ceiling. The boxcar is mainly used to transport luggage and express, and it can also transport people in an emergency. It used to be called "stuffy tank car".

The traditional box car has no inner lining. Later, in order to prevent the damage to the car body by the goods and forklifts during the transportation and loading and unloading process, an anti-collision inner lining plate is added inside the steel skeleton of the side wall frame. Since the frame of the boxcar is made of steel, and the boxcar is mainly used to transport goods, there will be constant collisions during transportation, which requires the anti-collision lining board to have considerable impact resistance.

According to the requirements of customers, the anti-collision board needs to meet certain impact resistance requirements, and at the same time, there are certain restrictions on flame retardancy. In actual production, it is found that in the production process of continuous fiber reinforced composite materials, the added flame retardant is an inorganic filler. The problem of insufficient fluidity occurs during the fusion process with PP. At the same time, the flame retardant needs to be in the molten PP environment for a long time in the manufacturing process of the unidirectional tape. The long-term high temperature makes the flame retardant yellow and black. It has a serious impact on the appearance of the product, so how to produce a unidirectional tape with a flame-retardant effect or how to obtain a high flame-retardant effect for the entire finished board has always been a research issue for people in the industry.

Utility model content

In order to solve the above problems, the utility model provides a flame-retardant railway box car inner liner, the specific technical scheme is as follows:

A flame-retardant railway box car inner lining board, comprising an upper skin, a lower skin and a flame-retardant core board formed by thermocompression, the flame-retardant core board is located between the upper skin and the lower skin, and the upper skin surface and the A flame retardant layer is provided on the surface of the lower epidermis.

The flame-retardant railway boxcar inner lining board with this structure can meet the customer's requirements for flame-retardant performance, and the traditional inner lining board production process needs to first add inorganic flame retardants to the inside of the upper and lower skin materials and then make it The upper and lower skins in this structure will affect the manufacturing process of producing the upper and lower skins, but in the inner liner of this structure, the production of the upper and lower skins still only needs to be made according to the traditional method, which is convenient and quick.

A further improvement is that: the flame retardant layer is obtained by adding a flame retardant to the PP film, and the flame retardant is a special flame retardant for fiber-reinforced PP.

A further improvement is that: the flame retardant layer is a PVC film, and the thickness of the film is 0.05-0.15mm.

A further improvement is: if the main material of the flame-retardant layer is PVC, the flame-retardant layer is connected to the upper skin or the lower skin through a hot-melt connection layer.

A further improvement is that: the flame retardant layer is obtained by adding a flame retardant to a PP material film, the thickness of the PP film is 0.05-0.2 mm, and the oxygen index of the PP film is above 28.

A further improvement is that: the flame retardant is an intumescent flame retardant.

A further improvement is that: the upper and lower skins are respectively composed of at least two layers of unidirectional prepreg tapes, and two adjacent layers of unidirectional prepreg tapes form an included angle of 90 degrees.

Using fiber prepreg tape instead of traditional bamboo glue as the anti-collision layer can reduce the overall weight of the inner liner under the same impact; moreover, two adjacent layers of unidirectional prepreg tape are perpendicular to each other, which can Tensile forces are provided in two directions, which greatly facilitates the analysis of tensile forces.

The further improvement is: the material of the unidirectional prepreg tape is continuous glass fiber reinforced thermoplastic polypropylene resin composite material; the material of the flame-retardant core board is short fiber reinforced thermoplastic polypropylene resin composite material; the upper and lower The thickness of the skin is 0.5-2.0mm, and the thickness of the flame-retardant core board is 1.5-6.0mm.

PP material, that is, high-polymer polypropylene material is widely used. Flame retardant itself has no fluidity and is an inorganic substance. After being added to PP, it will affect the overall production process. Therefore, the use of surface-mounted flame-retardant film can avoid making fiber The flame retardant tape is made when the reinforcement tape is made; the upper and lower skin layers are made of continuous glass fiber reinforced thermoplastic polypropylene resin composite material, and the core board is made of short fiber reinforced thermoplastic polypropylene resin composite material. Both materials have very good resistance Impact resistance, which can reduce the thickness of the main body of the lining board (upper and lower surface layers and core board) under the condition of bearing the same impact force, and it is easier and faster to install on the inner wall of the box car.

A further improvement is that: the flame retardant core board is made by adding a flame retardant to the short fiber reinforced thermoplastic polypropylene resin composite material, and the flame retardant core board also has a flame retardant effect.

Beneficial effects of the utility model: when using the railway boxcar inner liner with the structure of the utility model, not only can play the effect of anti-collision and flame retardancy, but also will not add flame retardant to the The subsequent manufacturing troubles caused by the production materials of the upper and lower skins.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 and Fig. 3 are schematic diagrams of the unidirectional fiber prepreg tapes and their mutual superposition in the embodiment.

Among them: 1-upper skin, 2-lower skin, 3-flame-retardant core board, 4-flame-retardant layer, 5-hot-melt connection layer, 6-unidirectional prepreg tape.

Detailed ways

In order to deepen the understanding of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the utility model and do not limit the scope of protection.

Example 1

As shown in Figure 1, a flame-retardant railway boxcar inner liner comprises an upper skin 1, a lower skin 2 and a flame-retardant core board 3 formed by hot-pressing composite, and the flame-retardant core board 3 is located between the upper skin 1 and the Between the lower skins 2, the surface of the upper skin 1 and the lower skin 2 are provided with a flame retardant layer 4, the flame retardant layer 4 is a PVC material film, the thickness of the film is 0.1mm, and the flame retardant layer 4 and the upper skin The epidermis 1 or the lower epidermis 2 are connected by a hot-melt connection layer 5, and the upper epidermis 1 and the lower epidermis 2 are respectively composed of two layers of unidirectional prepreg tape 6, as shown in Figure 2, which shows the structure of the unidirectional prepreg tape 6 Schematic diagram, two adjacent layers of unidirectional prepreg tapes 6 form an angle of 90 degrees, see Figure 3, which shows a schematic diagram of the arrangement structure of adjacent two layers of prepreg tapes 6 at an angle of 90 degrees, the unidirectional prepreg tape 6 The material is continuous glass fiber reinforced thermoplastic polypropylene resin composite material; the material of the flame-retardant core board 3 is short fiber reinforced thermoplastic polypropylene resin composite material; the thickness of the upper skin 1 and the lower skin 2 are 0.8mm, 0.7mm respectively mm, the thickness of the flame retardant core board 3 is 1.5mm, the flame retardant core board 4 is made by adding a pp special flame retardant to short fiber reinforced thermoplastic polypropylene resin composite material, the flame retardant core board 4 4 A flame retardant structure will also be formed inside.

In this embodiment, PVC material is used as the main material of the flame-retardant layer. In order to strengthen the firmness, hot-melt adhesive is used to connect the flame-retardant layer and the upper and lower skins.

The railway boxcar inner liner of the structure in this embodiment can play a traditional anti-collision effect and also has a flame-retardant effect. During the manufacturing process, there will be no damage caused by adding inorganic flame retardants to PP materials. Subsequent manufacturing troubles; and the use of PP material as the material of the impact-resistant parts can reduce the thickness and weight without affecting the impact resistance performance, and the use is more convenient and quick.

Example 2

The difference between this embodiment and embodiment 1 lies in the material of the flame-retardant layer and its connection with the upper and lower skins. See Fig. 1, ignoring the hot-melt connection layer 5, in this embodiment, the flame retardant layer 4 is obtained by adding a flame retardant to the PP material film, and the flame retardant is preferably an intumescent flame retardant, so The thickness of the PP film is 0.15mm, and the oxygen index of the PP film reaches 32. Since the upper and lower skins and the flame-retardant core board are made of PP material, the flame-retardant layer 4 only needs to be directly pressed on the upper skin 1 and the lower skin by thermal lamination. Skin 2 is enough.

In this embodiment, it is only necessary to add a flame retardant to pp to make a flame retardant film, and there is no need to further process it into a prepreg tape, which overcomes the troubles in subsequent manufacturing.

Claims (9)

1. A flame-retardant railway boxcar inner liner, comprising an upper skin, a lower skin and a flame-retardant core board formed through hot-pressing composite molding, and the flame-retardant core board is located between the upper skin and the lower skin, and is characterized in that: The upper skin surface and the lower skin surface are provided with flame retardant layers. 2. A kind of flame-retardant railway boxcar inner liner according to claim 1, characterized in that: the flame-retardant layer is obtained by adding a flame retardant to the PP film, and the flame retardant is fiber-reinforced PP Special flame retardant. 3. A flame-retardant railway boxcar inner liner according to claim 1, characterized in that: the flame-retardant layer is a PVC film, and the thickness of the film is 0.05-0.15mm. 4. A flame-retardant railway box car inner lining according to claim 3, characterized in that: the flame-retardant layer is connected to the upper skin or the lower skin through a hot-melt connection layer. 5. A flame-retardant railway boxcar inner liner according to claim 2, characterized in that: the flame-retardant layer is obtained by adding a flame retardant to a PP material film, and the thickness of the PP film is 0.05-0.2 mm, the oxygen index of the PP film reaches above 28. 6 . A flame-retardant railway box car inner lining according to claim 5 , wherein the flame retardant is an intumescent flame retardant. 7 . 7. A flame-retardant railway boxcar inner liner according to claim 1, characterized in that: the upper and lower skins are respectively composed of at least two layers of unidirectional prepreg tape, and two adjacent layers of unidirectional prepreg tape with a 90-degree angle. 8. A flame-retardant railway boxcar inner liner according to claim 7, characterized in that: the material of the unidirectional prepreg tape is a continuous glass fiber reinforced thermoplastic polypropylene resin composite material; the flame-retardant core The material of the board is short fiber reinforced thermoplastic polypropylene resin composite material; the thickness of the upper and lower skins is 0.5-2.0 mm respectively, and the thickness of the flame-retardant core board is 1.5-6.0 mm. 9. A flame-retardant railway boxcar inner liner according to claim 8, characterized in that: the flame-retardant core board is made by adding a flame retardant to a short fiber reinforced thermoplastic polypropylene resin composite material.