Polyetherimide composite material plate with flame retardant property

Abstract

The utility model discloses a polyetherimide composite material plate with flame retardant property, and relates to the technical field of composite material plates, the composite material plate is composed of an upper plate and a lower plate, the composite material plate is internally provided with a filling cavity, the filling cavity is filled with flame retardant filler, the flame retardant filler is epoxy resin added with nano SiO2, and the filling cavity is filled with flame retardant filler. An injection hole communicated with the filling cavity is formed in one side of the upper plate, and the filling cavity is filled with the flame-retardant filler through the injection hole. According to the polyetherimide composite material plate, the surfaces of the upper plate and the lower plate are subjected to plasma treatment to form rough outer surfaces, then polyurethane or rubber-based paint is sprayed on the rough outer surfaces, the surfaces of the upper plate and the lower plate have certain toughness, epoxy resin added with nanometer SiO2 is filled in the filling cavity, and the polyetherimide composite material plate plays a good role in tear resistance of the polyetherimide composite material plate; the flame retardant property of the polyetherimide composite material plate can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of composite material board technology, specifically a polyetherimide composite material board with flame-retardant properties. Background Technology

[0002] Polyetherimide composite board is a type of board made of thermoplastic polyetherimide material.

[0003] Although polyetherimide composite boards already have excellent flame retardant properties, their low elongation at break makes them more susceptible to tearing and cracking under external forces. Once tearing and cracking occur, their flame retardant properties will be affected and limited. Utility Model Content

[0004] The purpose of this invention is to provide a polyetherimide composite material plate with flame-retardant properties to solve the problems mentioned in the background art.

[0005] To solve the above technical problems, this utility model provides a polyetherimide composite material plate with flame retardant properties. The composite material plate is composed of an upper plate and a lower plate. The bottom of the upper plate has a top cavity and the top of the lower plate has a bottom cavity. The top cavity and the bottom cavity form a filling cavity inside the composite material plate. The filling cavity is filled with flame retardant filler. An injection hole communicating with the filling cavity is provided on one side of the upper plate.

[0006] Both the upper and lower plates are provided with an elastic coating, which is a polyurethane or rubber-based coating.

[0007] Furthermore, the flame-retardant filler is an epoxy resin with added nano-SiO2.

[0008] Furthermore, the injection hole is a cylindrical hole.

[0009] Furthermore, the height of the top wall inside the injection hole is consistent with the height of the top wall of the top cavity.

[0010] Furthermore, the diameter of the injection hole is 0.3mm-0.6mm.

[0011] Furthermore, the combined height of the bottom cavity and the top cavity does not exceed 1 / 4 of the combined height of the upper plate and the lower plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the surfaces of the upper and lower plates are plasma-treated to form a rough outer surface, and then sprayed with polyurethane or rubber-based coatings, giving the surfaces of the upper and lower plates a certain degree of toughness, thereby improving the elongation at break of the polyetherimide composite board. This minimizes the problem of tearing or cracking on the surface of the polyetherimide composite board due to external forces, which affects its flame retardant performance. The filling cavity is filled with epoxy resin containing nano-SiO2. When the nano-SiO2 is specially treated and added to the epoxy resin, the interfacial bonding between the nano-SiO2 particles and the epoxy resin is strong, which can absorb a large amount of impact energy and improve the toughness of the filler, thereby improving the overall toughness of the polyetherimide composite board. This plays a positive role in the tear resistance of the polyetherimide composite board. At the same time, the epoxy resin containing nano-SiO2 particles also has excellent flame retardant properties, which can further improve the flame retardant performance of the polyetherimide composite board. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the external structure of a polyetherimide composite material plate with flame-retardant properties;

[0014] Figure 2 is a schematic diagram of the internal structure of a polyetherimide composite material plate with flame-retardant properties;

[0015] Figure 3 is a cross-sectional view of a polyetherimide composite plate with flame-retardant properties.

[0016] In the diagram: 1. Upper plate; 2. Lower plate; 3. Elastic coating; 4. Injection hole; 5. Bottom cavity; 6. Top cavity;

[0017] 7. Filling cavity. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "inner," and "outer" indicate directions or positions.

[0020] The references to the orientation or positional relationships shown in the accompanying drawings are for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Although polyetherimide composite boards already have excellent flame retardant properties, their low elongation at break makes them more susceptible to tearing and cracking under external forces. Once tearing and cracking occur, their flame retardant properties will be affected and limited.

[0023] To resolve the above issues, please refer to Figure 1-3 This invention provides a polyetherimide composite material board with flame-retardant properties: the composite material board consists of an upper plate 1 and a lower plate 2, with the upper plate 1 located above the lower plate 2. The upper plate 1 and the lower plate 2 are integrally formed. A top cavity 6 is formed at the bottom of the upper plate 1, and a bottom cavity 5 is formed at the top of the lower plate 2. The shapes of the top cavity 6 and the bottom cavity 5 are not limited and can be flexibly selected according to the shape of the polyetherimide composite material board. The height of the bottom cavity 5 and the top cavity 6 does not exceed 1 / 4 of the sum of the heights of the upper plate 1 and the lower plate 2, so as to ensure the flame-retardant properties of the polyetherimide composite material. The main body of the imide composite material plate has a top cavity 6 and a bottom cavity 5 forming a filling cavity 7 inside the composite material plate. The filling cavity 7 is filled with flame-retardant filler, which is epoxy resin with added nano-SiO2. An injection hole 4 communicating with the filling cavity 7 is opened on one side of the upper plate 1. The injection hole 4 is a cylindrical hole. The height of the top wall of the injection hole 4 is the same as the height of the top wall of the top cavity 6. The diameter of the injection hole 4 is 0.3mm-0.6mm. The flame-retardant filler is filled into the filling cavity 7 through the injection hole 4.

[0024] Both the upper plate 1 and the lower plate 2 have an elastic coating 3 on their surfaces. The elastic coating 3 is a polyurethane or rubber-based coating. The surfaces of the upper plate 1 and the lower plate 2 are plasma-treated to form a rough outer surface before being sprayed with polyurethane.

[0025] Alternatively, a rubber-based coating can be used to give the surfaces of the upper plate 1 and the lower plate 2 a certain degree of toughness, thereby improving the elongation at break of the polyetherimide composite material plate. Plasma treatment can make the polyurethane or rubber-based coating adhere more fully to the outer surfaces of the upper plate 1 and the lower plate 2.

[0026] Working principle: The surfaces of the upper plate 1 and the lower plate 2 are plasma-treated to form a rough outer surface, and then sprayed with polyurethane or rubber-based coating to give the surfaces of the upper plate 1 and the lower plate 2 a certain degree of toughness, thereby improving the elongation at break of the polyetherimide composite board. This minimizes the problem of tearing or cracking of the polyetherimide composite board surface due to external forces, which affects the flame retardant performance. The filling cavity 7 is filled with epoxy resin with added nano-SiO2. When the nano-SiO2 is specially treated and added to the epoxy resin, the interfacial bonding between the nano-SiO2 particles and the epoxy resin is strong, which can absorb a large amount of impact energy and improve the toughness of the filler, thereby improving the overall toughness of the polyetherimide composite board. This plays a positive role in the tear resistance of the polyetherimide composite board. At the same time, the epoxy resin with added nano-SiO2 particles also has excellent flame retardant properties, which can further improve the flame retardant performance of the polyetherimide composite board.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A polyetherimide composite material board with flame-retardant properties, characterized in that: The composite material plate is composed of an upper plate (1) and a lower plate (2). The bottom of the upper plate (1) is provided with a top cavity (6), and the top of the lower plate (2) is provided with a bottom cavity (5). The top cavity (6) and the bottom cavity (5) form a filling cavity (7) located inside the composite material plate. The filling cavity (7) is filled with flame-retardant filler. An injection hole (4) communicating with the filling cavity (7) is provided on one side of the upper plate (1). Both the upper plate (1) and the lower plate (2) are provided with an elastic coating (3), which is a polyurethane or rubber-based coating.

2. The polyetherimide composite material plate with flame-retardant properties as described in claim 1, characterized in that: The injection hole (4) is a cylindrical hole.

3. The polyetherimide composite material board with flame-retardant properties as described in claim 2, characterized in that: The height of the inner top wall of the injection hole (4) is the same as the height of the top wall of the top cavity (6).

4. A polyetherimide composite material board with flame-retardant properties as described in claim 3, characterized in that: The diameter of the injection hole (4) is 0.3mm-0.6mm.

5. A polyetherimide composite material board with flame-retardant properties as described in claim 4, characterized in that: The height of the bottom cavity (5) and the top cavity (6) shall not exceed 1 / 4 of the height of the upper plate (1) and the lower plate (2).

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