Novel flame-retardant waterproof board

Abstract

The utility model discloses a novel flame-retardant waterproof board, which relates to the field of macromolecular waterproof products, and is characterized in that a reinforcing layer, an intumescent flame retardant layer and a metal hydroxide flame retardant flame-retardant layer are sequentially arranged from inside to outside by taking an EVA (Ethylene Vinyl Acetate) layer as a symmetrical structure; the metal hydroxide flame retardant flame-retardant layer is of a central cavity interlayer structure, and a water-based flame-retardant material is arranged in an interlayer cavity of the metal hydroxide flame retardant flame-retardant layer; the intumescent flame retardant layer is of a central cavity interlayer structure, and an interlayer cavity of the intumescent flame retardant layer is internally provided with an isolation sand flame retardant material. The novel flame-retardant waterproof board provided by the utility model changes the single structural layer of the existing flame-retardant waterproof board, has a multi-layer waterproof flame-retardant structure, and has a better flame-retardant effect.

Description

Technical Field

[0001] The utility model relates to the field of polymer waterproof products, in particular to a novel flame retardant waterproof board. Background Art

[0002] Waterproofing sheets are primarily made from polymers like polyethylene. However, these materials are not self-extinguishing in air. Their high calorific value and rapid heat release rate during combustion can easily spread flames, creating significant operational and production risks. This poses significant safety concerns in semi-enclosed environments like tunnels. Existing waterproofing sheets have a relatively simple structure and lack effective flame retardancy. Therefore, a new flame-retardant waterproofing sheet is needed for tunnel waterproofing to overcome these issues. Utility Model Content

[0003] The purpose of the utility model is to provide a novel flame retardant waterproof board to solve the problem mentioned in the background art that the existing waterproof board has a relatively simple structure and does not have good flame retardant performance.

[0004] The utility model adopts the following technical solutions:

[0005] The utility model discloses a novel flame retardant waterproof board, which is symmetrically provided with an EVA layer from the inside to the outside in sequence: a reinforcement layer, an intumescent flame retardant layer and a metal hydroxide flame retardant flame retardant layer; the metal hydroxide flame retardant flame retardant layer is a central cavity sandwich structure, and a water-based flame retardant material is provided in the interlayer cavity of the metal hydroxide flame retardant layer; the intumescent flame retardant layer is a central cavity sandwich structure, and an isolation sand flame retardant material is provided in the interlayer cavity of the intumescent flame retardant layer.

[0006] Furthermore, the metal hydroxide flame retardant layer and the intumescent flame retardant layer are fixedly connected by a first adhesive; and the intumescent flame retardant layer and the reinforcement layer are fixedly connected by a second adhesive.

[0007] Furthermore, the thickness of the metal hydroxide flame retardant flame retardant layer is 0.8-1.0 mm, and the thickness of the water-based flame retardant material is 0.3-0.5 mm.

[0008] Furthermore, the thickness of the intumescent flame retardant layer is 0.8-1.0 mm, and the thickness of the isolation sand flame retardant material is 0.3-0.5 mm.

[0009] Furthermore, the thickness of the reinforcement layer is 0.3-0.5 mm.

[0010] Furthermore, the thickness of the EVA layer is 0.5-1.0 mm.

[0011] Compared with the prior art, the beneficial technical effects of the present invention are:

[0012] The utility model provides a novel flame retardant waterproof board, which changes the single structural layer of the existing flame retardant waterproof board, has a multi-layer waterproof and flame retardant structure, and has better flame retardant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is the main view of a new flame retardant waterproof board of the utility model;

[0015] Explanation of the accompanying drawings: 1. Metal hydroxide flame retardant flame retardant layer; 2. Water-based flame retardant material; 3. First adhesive; 4. Intumescent flame retardant layer; 5. Isolation sand flame retardant material; 6. Second adhesive; 7. Reinforcement layer; 8. EVA layer. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, this embodiment discloses a novel flame-retardant waterproof board, which is symmetrically provided with a reinforcing layer 7, an intumescent flame retardant layer 4 and a metal hydroxide flame retardant flame retardant layer 1 from the inside to the outside with an EVA layer 8; the metal hydroxide flame retardant flame retardant layer 1 is a central cavity sandwich structure, and a water-based flame retardant material 2 is provided in the interlayer cavity of the metal hydroxide flame retardant layer 1; the intumescent flame retardant layer 4 is a central cavity sandwich structure, and an isolation sand flame retardant material 5 is provided in the interlayer cavity of the intumescent flame retardant layer 4.

[0018] The metal hydroxide flame retardant layer 1 and the intumescent flame retardant layer 4 are fixedly connected by a first adhesive 3. The intumescent flame retardant layer 4 and the reinforcing layer 7 are fixedly connected by a second adhesive 6. The reinforcing layer 7 and the EVA layer 8 are extruded using a multi-layer co-extrusion process. In this embodiment, the first adhesive 3 and the second adhesive 6 are both hot melt adhesives.

[0019] The material of the metal hydroxide flame retardant flame retardant layer 1 is magnesium hydroxide board, and its thickness is 0.8-1.0mm, and the material of the water-based flame retardant material 2 is nitrogen-phosphorus liquid flame retardant, and its thickness is 0.3-0.5mm. The metal hydroxide flame retardant flame retardant layer 1 has a water-absorbing hydroxide that absorbs heat and decomposes to form crystal water and oxides as the polymer burns, which has the effect of lowering the temperature of the combustion system. The crystal water is heated to form water vapor and is released, which plays a role in diluting the combustible gas and suppressing combustion in the gas phase. In addition, the decomposed oxides can also be evenly distributed on the surface of the polymer to form a dense film, isolating the spread of heat and flames. At the same time, during combustion, the water-based flame retardant material 2 in the interlayer is released, while reducing the burning speed and spread ability of the flame, thereby further improving the flame retardant properties of the metal hydroxide flame retardant flame retardant layer 1.

[0020] The material of the intumescent flame retardant layer 4 is an organic nitrogen-phosphorus intumescent flame retardant with a thickness of 0.8-1.0mm, and the material of the isolation sand flame retardant material 5 is chemical isolation sand with a thickness of 0.3-0.5mm. If the flame burns through the metal hydroxide flame retardant flame retardant layer 1, the flame spreads to the intumescent flame retardant layer 4, forming a regular and dense expanded carbon layer. This expanded carbon layer is heat-insulating and temperature-resistant, making the intumescent flame retardant have advantages such as good thermal stability, non-toxic halogen-free and high flame retardant properties. The isolation sand flame retardant material 5 in the interlayer is released, more effectively extinguishing the flame. After the formation of the expanded carbon layer, the adhesive 6 loses its bonding effect with the reinforcement layer 7, causing it to detach from the reinforcement layer 7, causing the flame to detach from the waterproof coiled material, isolating it from continuing to burn.

[0021] The reinforcement layer 7 is extruded from high-density polyethylene (HDPE) resin (40%), metallocene polyethylene (MPE) resin (15%), polypropylene (PP) resin (40%), and specialized additives and anti-aging agents (5%). The thickness of the reinforcement layer 7 is 0.3-0.5mm. The addition of HDPE and PP, along with the use of MPE for grafting, enhances their compatibility. The high-strength HDPE and PP give the reinforcement layer 7 increased strength, as well as excellent tensile and puncture resistance.

[0022] The EVA layer 8 is extruded from ethylene-vinyl acetate (EVA) resin (20%), linear low-density polyethylene (LLDPE) resin (75%), and special additives and an anti-aging agent (5%). The thickness of the EVA layer 8 is 0.5-1.0 mm. The ethylene-vinyl acetate resin provides excellent flexibility and improves the flexibility and elongation of the waterproof board.

[0023] The fire prevention principle of this utility model is as follows:

[0024] The metal hydroxide flame retardant flame retardant layer 1 has a water-absorbing hydroxide that absorbs heat and decomposes to form crystal water and oxides as the polymer burns, which has the effect of lowering the temperature of the combustion system. The crystal water is heated to form water vapor and is released, which dilutes the combustible gas and suppresses combustion in the gas phase. In addition, the decomposed oxide can also be evenly distributed on the surface of the polymer to form a dense film, isolating the spread of heat and flames. At the same time, during combustion, the water-based flame retardant material 2 in the interlayer is released, while reducing the burning speed and spread of the flame, thereby further improving the flame retardant properties of the metal hydroxide flame retardant flame retardant layer 1.

[0025] If the flame burns through the metal hydroxide flame retardant layer 1 and spreads to the intumescent flame retardant layer 4, a regular and dense expanded carbon layer is formed. This expanded carbon layer is heat-insulating and temperature-resistant, giving the intumescent flame retardant the advantages of good thermal stability, non-toxicity, halogen-free, and high flame retardancy. The insulating sand flame retardant material 5 in the interlayer is released, more effectively extinguishing the flame. After the expanded carbon layer is formed, the adhesive 6 loses its bonding with the reinforcement layer 7, separating it from the reinforcement layer 7, allowing the flame to escape from the waterproof membrane and isolating it from further combustion.

[0026] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A new type of flame retardant waterproof board, characterized by: A reinforcement layer (7), an intumescent flame retardant layer (4) and a metal hydroxide flame retardant flame retardant layer (1) are symmetrically arranged from the inside to the outside of the EVA layer (8); The metal hydroxide flame retardant flame retardant layer (1) is a central cavity sandwich structure, and a water-based flame retardant material (2) is arranged in the sandwich cavity of the metal hydroxide flame retardant layer (1); The intumescent flame retardant layer (4) is a central cavity sandwich structure, and an isolation sand flame retardant material (5) is provided in the sandwich cavity of the intumescent flame retardant layer (4).

2. The novel flame retardant waterproof board according to claim 1 is characterized in that: The metal hydroxide flame retardant layer (1) and the intumescent flame retardant layer (4) are fixedly connected by a first adhesive (3); The intumescent flame retardant layer (4) and the reinforcement layer (7) are fixedly connected by a second adhesive (6).

3. The novel flame retardant waterproof board according to claim 1 is characterized in that: The thickness of the metal hydroxide flame retardant flame retardant layer (1) is 0.8-1.0 mm, and the thickness of the water-based flame retardant material (2) is 0.3-0.5 mm.

4. The novel flame retardant waterproof board according to claim 1 is characterized in that: The intumescent flame retardant layer (4) has a thickness of 0.8-1.0 mm, and the isolation sand flame retardant material (5) has a thickness of 0.3-0.5 mm.

5. The novel flame retardant waterproof board according to claim 1 is characterized in that: The thickness of the reinforcement layer (7) is 0.3-0.5 mm.

6. The novel flame retardant waterproof board according to claim 1 is characterized in that: The thickness of the EVA layer (8) is 0.5-1.0 mm.

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