High-flame-retardant polypropylene wave-absorbing material

Abstract

The utility model provides a high-flame-retardant polypropylene wave-absorbing material which comprises a pyramid formed by adhering a plurality of core bodies, and a flame-retardant decorative layer is coated outside the pyramid; the core body comprises polypropylene particles and a conductive flame-retardant layer wrapping the polypropylene particles. The polypropylene particles are conductive polypropylene particles. And the conductive flame-retardant layer is a conductive flame-retardant coating. And the flame-retardant decorative layer is a flame-retardant colored layer. The high-flame-retardant polypropylene wave-absorbing material disclosed by the utility model is simple and reasonable in structure, has wave-absorbing property and flame-retardant property, meets the B1-level flame-retardant requirement, and can be widely applied to microwave darkrooms.

Description

Technical Field

[0001] The utility model relates to the technology of wave absorbing materials, in particular to a highly flame-retardant polypropylene wave absorbing material. Background Art

[0002] Absorbing materials refer to materials that can absorb most of the electromagnetic waves projected onto their surface and convert them into other forms of energy with almost no reflection. With the development of electronic and communication technologies, more and more performance requirements are put forward for absorbing materials. In addition to good absorbing performance, they are also required to have low volatility, low oil permeability, good insulation performance, resistance to high voltage breakdown, aging resistance, flame retardancy and other properties.

[0003] Traditional absorbing materials are polyurethane sponge absorbing materials. Through the impregnation process, absorbents and flame retardants are impregnated into open-cell polyurethane sponges. However, due to the open-cell structure of polyurethane sponges, the impregnated absorbents and flame retardants are easy to fall off over time, which affects the absorption and flame retardant properties on the one hand, and pollutes the test environment on the other hand. In order to solve the above problems, rigid closed-cell absorbing materials such as polystyrene and polypropylene have been launched in recent years. The production of polypropylene absorbing materials is to melt the absorbent, flame retardant and polypropylene raw materials, granulate, foam and shape them, which is more evenly dispersed and has better absorption and energy absorption. In addition, polypropylene has excellent toughness and mechanical strength, making polypropylene absorbing materials very popular in the market.

[0004] However, polypropylene absorbing materials also have their own defects. During the production process, the added absorbent, flame retardant and polypropylene raw materials are melted and foamed. Due to process limitations, the flame retardant performance has not been able to meet the B1 flame retardant requirements.

[0005] Therefore, there is an urgent need for an absorbing material having both high absorbing performance and high flame retardant performance. Utility Model Content

[0006] The utility model aims to provide a highly flame-retardant polypropylene absorbing material for the problem that traditional polypropylene absorbing materials have poor flame-retardant effects. The material has both absorbing properties and flame-retardancy and can be widely used in microwave darkrooms.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a highly flame-retardant polypropylene absorbing material, including a pyramid composed of multiple cores bonded together, and the outside of the pyramid is coated with a flame-retardant decorative layer; the core includes polypropylene particles and a conductive flame-retardant layer wrapped around the outside of the polypropylene particles.

[0008] Furthermore, the polypropylene particles are conductive polypropylene particles. The conductive polypropylene particles can be conventional products obtained from the market, such as EPP conductive particles produced by Wuxi Huitong Light Materials Co., Ltd.

[0009] Furthermore, the conductive flame retardant layer is a conductive flame retardant coating, which is a conventional product that can be purchased commercially, such as the conductive flame retardant coating produced by Changzhou Kuncai Chemical Co., Ltd.; a publicly available patented product may also be used, such as the flame retardant coating disclosed in CN201410669557.4.

[0010] Furthermore, the flame retardant decorative layer is a flame retardant color layer, and the color can be customized as needed. The flame retardant decorative layer is, for example, a water-based fire retardant paint produced by Dongguan Shengjing Environmental Protection Technology Co., Ltd. The flame retardant decorative layer is sprayed on the outside of the pyramid, which further ensures the flame retardant performance of the product, and the color can be adjusted at will, thereby improving the aesthetics of the product.

[0011] Furthermore, the diameter of the polypropylene particles is 2-3 mm.

[0012] Furthermore, the thickness of the conductive flame-retardant layer is 20-100 microns, preferably 50 microns.

[0013] Furthermore, the thickness of the flame retardant decorative layer is 10-50 microns, preferably 30 microns.

[0014] Furthermore, the top of the pyramid is truncated.

[0015] Compared with the prior art, the highly flame-retardant polypropylene wave-absorbing material of the utility model has the following advantages:

[0016] 1) The core of the utility model includes polypropylene particles and a conductive flame retardant layer wrapped around the polypropylene particles. The polypropylene has excellent mechanical properties, such as excellent wave absorption performance, moisture resistance and service life, but polypropylene is a flammable material. The utility model coats the conductive flame retardant layer on the flammable polypropylene, which effectively improves the flame retardancy of the core.

[0017] 2) The conductive flame retardant layer coated on the outside of the polypropylene particles of the utility model has conductivity, which can ensure that the current of the conductive flame retardant layer and the polypropylene particles is connected, thereby ensuring the wave absorbing performance. After coating the conductive flame retardant layer, the oxygen index of the polypropylene wave absorbing material can be increased from 25 to 32, reaching the B1 level flame retardant requirement.

[0018] 3) To meet the needs of aesthetics or invisibility, a flame retardant decorative layer is sprayed on the outer layer of the pyramid, and the color can be customized as needed. The flame retardant decorative layer further ensures the flame retardant performance of the product on the one hand, and improves the aesthetics of the product on the other. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the main view of the highly flame-retardant polypropylene absorbing material;

[0020] Figure 2 for Figure 1 AA section view. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0023] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0024] Example 1

[0025] This embodiment discloses a highly flame-retardant polypropylene wave-absorbing material, such as Figure 1 and Figure 2 As shown, it includes a pyramid formed by bonding a plurality of core bodies, and the pyramid is coated with a flame retardant decorative layer 3; the core body includes polypropylene particles 1 and a conductive flame retardant layer 2 wrapped around the polypropylene particles.

[0026] The diameter of the polypropylene particles is 2-3 mm. The thickness of the conductive flame retardant layer is 50 μm. The thickness of the flame retardant decorative layer is 30 μm.

[0027] The polypropylene particles described in this embodiment are conductive polypropylene particles. The conductive polypropylene particles are conventional products that can be purchased commercially, such as conductive EPP particles produced by Wuxi Huitong Light Materials Co., Ltd. The conductive flame retardant layer described in this embodiment is a conventional product that can be purchased commercially, such as a conductive flame retardant coating produced by Changzhou Kuncai Chemical Co., Ltd. A publicly disclosed patented product may also be used, such as the flame retardant coating disclosed in CN201410669557.4.

[0028] The flame retardant decorative layer in this embodiment is a flame retardant color layer, and the color can be customized as needed. The flame retardant decorative layer is, for example, a water-based fire retardant paint produced by Dongguan Shengjing Environmental Protection Technology Co., Ltd. The flame retardant decorative layer is sprayed on the outside of the pyramid, which further ensures the flame retardant performance of the product and the color can be adjusted at will, thereby improving the aesthetics of the product.

[0029] The flame retardant performance of the highly flame retardant polypropylene absorbing material of this embodiment can reach B1 level. The absorption performance of the polypropylene absorbing material with a height of 500 mm is shown in the following table.

[0030]

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A highly flame-retardant polypropylene absorbing material, characterized in that: It comprises a pyramid formed by bonding a plurality of core bodies, the pyramid being coated with a flame retardant decorative layer; the core body comprises polypropylene particles and a conductive flame retardant layer wrapped outside the polypropylene particles; The polypropylene particles are conductive polypropylene particles.

2. The highly flame-retardant polypropylene absorbing material according to claim 1, characterized in that: The conductive fire-retardant layer is a conductive fire-retardant coating.

3. The highly flame-retardant polypropylene absorbing material according to claim 1, characterized in that: The flame retardant decorative layer is a flame retardant color layer.

4. The highly flame-retardant polypropylene absorbing material according to claim 1, characterized in that: The diameter of the polypropylene particles is 2-3 mm.

5. The highly flame-retardant polypropylene absorbing material according to claim 1, characterized in that: The thickness of the conductive flame retardant layer is 20-100 microns.

6. The highly flame-retardant polypropylene absorbing material according to claim 1, characterized in that: The thickness of the flame retardant decorative layer is 10-50 microns.

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