Lightweight fire-retardant polyurethane insulation board

Abstract

The utility model discloses a kind of lightweight flame-retardant polyurethane insulation board, it is related to insulation board technical field, including polyurethane foam layer, the top surface and bottom surface of polyurethane foam layer are fixedly connected with outer sheathing, two outer sheathings are fixedly connected with reinforcing strut, reinforcing strut is set in the inside of polyurethane foam layer and is penetrated, polyurethane foam layer includes outer layer and core layer, core layer is fixedly connected between two outer layers, core layer includes insulation layer and flame-retardant mesh cloth, multiple flame-retardant mesh cloth is arranged in the inside of insulation layer with interval, insulation layer is fixedly connected with flame-retardant mesh cloth, the utility model is set to realize gradient structure by the cooperation of outer layer and core layer, can reduce the density increase problem caused by pursuing flame-retardant due to traditional uniform cell, give consideration to lightweight, high-strength and insulation, cooperate the setting of flame-retardant mesh cloth and effectively suppress flame along cell wall spread, simultaneously as mechanical support skeleton, improve board tear strength and prevent cracking.

Description

Technical Field

[0001] This utility model relates to the field of insulation board technology, and in particular to a lightweight flame-retardant polyurethane insulation board. Background Technology

[0002] Polyurethane insulation boards are widely used in the field of building insulation due to their excellent thermal insulation performance, good sealing performance and high strength. They can be used for various aspects of building insulation, such as exterior wall insulation, roof insulation, and cold storage insulation, which can effectively reduce building energy consumption and improve indoor comfort.

[0003] However, in the existing technology, traditional polyurethane insulation boards are usually flammable and have a low oxygen index. When exposed to open flames or high temperatures, they are easy to burn and release a lot of heat and toxic fumes. This limits their application in buildings with high fire protection requirements to a certain extent. In order to ensure the strength and insulation performance of polyurethane insulation boards, the density of the material is often increased, resulting in a heavier weight. Utility Model Content

[0004] The purpose of this invention is to solve the problems of traditional polyurethane insulation boards, which are usually flammable, have a low oxygen index, and are prone to combustion when exposed to open flames or high temperatures, releasing a large amount of heat and toxic fumes, and are also heavy. Therefore, a lightweight flame-retardant polyurethane insulation board is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lightweight flame-retardant polyurethane insulation board, comprising a polyurethane foam layer, with an outer protective plate fixedly connected to the top and bottom surfaces of the polyurethane foam layer, and a reinforcing support rod fixedly connected between the two outer protective plates, the reinforcing support rod penetrating and disposed inside the polyurethane foam layer, the polyurethane foam layer comprising an outer layer and a core layer, the core layer being fixedly connected between the two outer layers, the core layer comprising an insulation layer and a flame-retardant mesh fabric, multiple flame-retardant mesh fabrics being spaced apart inside the insulation layer, and the insulation layer being fixedly connected to the flame-retardant mesh fabrics.

[0006] Preferably, a slot is provided on one side of the outer wall of the outer protective plate, and a clip is fixedly connected to the other side of the outer wall of the outer protective plate.

[0007] Preferably, the outer wall of the outer protective plate is provided with a connecting groove, and a connecting strip is fixedly connected to the inner wall of the connecting groove.

[0008] Preferably, a decorative panel is fixedly connected to the outer wall of the connecting strip, and the decorative panel is fixedly connected to the surface of the outer protective panel through the connecting strip.

[0009] Preferably, the outer protective panel includes a fiberglass board, a flame-retardant sheet, a reflective layer, and a fiberglass mat, with the reflective layer fixedly connected to the outer wall of the fiberglass mat.

[0010] Preferably, the flame-retardant sheet is fixedly connected to the outer wall of the reflective layer, and the fiberglass board is fixedly sleeved on the outside of the flame-retardant sheet, the reflective layer and the fiberglass mat.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, a gradient structure is achieved by combining the outer layer and the core layer, which can reduce the problem of increased density caused by the pursuit of flame retardancy in traditional uniform foam cells. It takes into account lightweight, high strength and heat insulation. The flame retardant mesh cloth effectively inhibits the spread of flame along the foam cell wall. At the same time, it serves as a mechanical support skeleton to improve the tear resistance of the board and prevent cracking.

[0013] 2. In this utility model, the slots and strips on both sides of the outer protective panel enable rapid installation and positioning during multi-assembly, effectively improving installation efficiency. The connecting grooves facilitate the user to quickly install the decorative panel onto the surface of the outer protective panel by engaging the connecting strip with the connecting groove, thus facilitating subsequent disassembly and replacement. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a lightweight flame-retardant polyurethane insulation board is provided for this utility model.

[0015] Figure 2 This utility model provides a schematic diagram of the internal structure of a lightweight flame-retardant polyurethane insulation board.

[0016] Figure 3 This utility model presents a schematic diagram of the internal structure of the polyurethane foam layer in a lightweight flame-retardant polyurethane insulation board.

[0017] Figure 4 This utility model presents a schematic diagram of the internal structure of a lightweight flame-retardant polyurethane insulation board outer cladding.

[0018] Legend: 1. Polyurethane foam layer; 11. Outer layer; 12. Core layer; 121. Insulation layer; 122. Flame-retardant mesh fabric; 2. Outer protective panel; 21. Fiberglass board; 22. Flame-retardant sheet; 23. Reflective layer; 24. Fiberglass felt; 3. Slot; 4. Clip; 5. Connecting strip; 6. Decorative panel; 7. Reinforcing rod; 8. Connecting groove. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a lightweight flame-retardant polyurethane insulation board, including a polyurethane foam layer 1. Outer protective plates 2 are fixedly connected to the top and bottom surfaces of the polyurethane foam layer 1. A reinforcing support rod 7 is fixedly connected between the two outer protective plates 2, and the reinforcing support rod 7 penetrates the interior of the polyurethane foam layer 1. The polyurethane foam layer 1 includes an outer layer 11 and a core layer 12. The outer layer 11 uses high-crosslinked polyurethane foam with small-density cells (≤50μm in diameter) and contains short-cut glass fibers, thereby improving surface compressive strength and impact resistance. To avoid damage during transportation / construction, the core layer 12 is made of polyurethane foam with a large pore density and a pore diameter of 80-100μm. While ensuring the overall flame retardant rating, the density of the core layer is reduced. The core layer 12 is fixedly connected between the two outer layers 11. The core layer 12 includes an insulation layer 121 and a flame retardant mesh 122. The flame retardant mesh 122 is made of basalt fiber and is treated with phosphorus-nitrogen synergistic flame retardancy. Multiple flame retardant meshes 122 are spaced apart inside the insulation layer 121, and the insulation layer 121 and the flame retardant mesh 122 are fixedly connected.

[0022] The specific settings and functions of this embodiment are described in detail below. The gradient structure is achieved through the cooperation of the outer layer 11 and the core layer 12, which can reduce the density increase problem caused by the pursuit of flame retardancy in traditional uniform foam cells. It takes into account lightweight, high strength and heat insulation. The flame retardant mesh cloth 122 effectively inhibits the spread of flame along the foam cell wall. At the same time, it serves as a mechanical support skeleton to improve the tear resistance of the board and prevent cracking. The reinforcement rod 7 provides internal auxiliary support for the utility model, further improving the overall strength of the utility model and making it suitable for high-load scenarios such as high-rise exterior walls.

[0023] Example 2: Figure 1 - Figure 4As shown, a slot 3 is provided on one side of the outer wall of the outer protective plate 2, and a strip 4 is fixedly connected to the other side of the outer wall of the outer protective plate 2. A connecting groove 8 is provided on the outer wall of the outer protective plate 2, and a connecting strip 5 is fixedly connected to the inner wall of the connecting groove 8. A decorative plate 6 is fixedly connected to the outer wall of the connecting strip 5. The decorative plate 6 is fixedly connected to the surface of the outer protective plate 2 through the connecting strip 5. The outer protective plate 2 includes a fiberglass board 21, a flame-retardant sheet 22, a reflective layer 23, and a fiberglass mat 24. The reflective layer 23 is fixedly connected to the outer wall of the fiberglass mat 24. The surface of the fiberglass mat 24 is coated with a polyurethane interface agent to enhance the adhesion. The reflective layer 23 is a vacuum-metallized polyester film with a reflectivity of ≥90%. It reflects heat in the direction of heat flow to reduce radiative heat transfer. The flame-retardant sheet 22 is fixedly connected to the outer wall of the reflective layer 23. The fiberglass board 21 is fixedly sleeved on the outside of the flame-retardant sheet 22, the reflective layer 23, and the fiberglass mat 24.

[0024] The overall effect of this embodiment is that, through the setting of the slots 3 and the strips 4 on both sides of the outer protective plate 2, the present invention can achieve rapid installation and positioning in multi-group assembly, effectively improving installation efficiency. Through the setting of the connecting groove 8, it is convenient for users to quickly install the decorative plate 6 on the surface of the outer protective plate 2 by engaging it with the connecting strip 5 and the connecting groove 8, which facilitates subsequent disassembly and replacement. Through the combined use of the fiberglass board 21, the flame retardant sheet 22, the reflective layer 23 and the fiberglass felt 24, the flame retardant and heat insulation effect of the present invention is improved.

[0025] The usage method and working principle of this device are as follows: The slots 3 and strips 4 on both sides of the outer protective plate 2 enable the device to be quickly installed and positioned during multi-assembly. The connecting groove 8 allows the user to quickly install the decorative plate 6 on the surface of the outer protective plate 2 by engaging it with the connecting strip 5. The gradient structure is achieved by the cooperation of the outer layer 11 and the core layer 12, which can reduce the density increase problem caused by the pursuit of flame retardancy in traditional uniform foam cells, while taking into account lightweight, high strength and heat insulation.

[0026] 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 other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A lightweight flame-retardant polyurethane insulation board, comprising a polyurethane foam layer (1), characterized in that: The top and bottom surfaces of the polyurethane foam layer (1) are fixedly connected to an outer protective plate (2). A reinforcing rod (7) is fixedly connected between the two outer protective plates (2). The reinforcing rod (7) is installed through the interior of the polyurethane foam layer (1). The polyurethane foam layer (1) includes an outer layer (11) and a core layer (12). The core layer (12) is fixedly connected between the two outer layers (11). The core layer (12) includes an insulation layer (121) and a flame-retardant mesh cloth (122). Multiple flame-retardant mesh cloths (122) are spaced apart inside the insulation layer (121). The insulation layer (121) and the flame-retardant mesh cloth (122) are fixedly connected.

2. The lightweight flame-retardant polyurethane insulation board according to claim 1, characterized in that: A slot (3) is provided on one side of the outer wall of the outer protective plate (2), and a clip (4) is fixedly connected to the other side of the outer wall of the outer protective plate (2).

3. The lightweight flame-retardant polyurethane insulation board according to claim 2, characterized in that: The outer wall of the outer protective plate (2) is provided with a connecting groove (8), and a connecting strip (5) is fixedly connected to the inner wall of the connecting groove (8).

4. The lightweight flame-retardant polyurethane insulation board according to claim 3, characterized in that: A decorative panel (6) is fixedly connected to the outer wall of the connecting strip (5), and the decorative panel (6) is fixedly connected to the surface of the outer protective panel (2) through the connecting strip (5).

5. A lightweight flame-retardant polyurethane insulation board according to claim 4, characterized in that: The outer protective panel (2) includes a fiberglass board (21), a flame-retardant sheet (22), a reflective layer (23), and a fiberglass mat (24), with the reflective layer (23) fixedly connected to the outer wall of the fiberglass mat (24).

6. The lightweight flame-retardant polyurethane insulation board according to claim 5, characterized in that: The flame retardant sheet (22) is fixedly connected to the outer wall of the reflective layer (23), and the fiberglass board (21) is fixedly sleeved on the outside of the flame retardant sheet (22), the reflective layer (23) and the fiberglass mat (24).

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