Polyurethane and mica mixed foaming sound insulation board for walls and floors

Abstract

The invention relates to the technical field of sound insulation boards, in particular to a polyurethane and mica mixed foaming sound insulation board for walls and floors. The flame-retardant polyurethane composite material comprises the following components in percentage by mass: 45-60% of polymethylene polyphenyl isocyanate (black material), 20-35% of all-water foaming flame-retardant rigid polyurethane foam combined polyether (white material), 18-30% of mica powder and 2-5% of water. The manufacturing method comprises the following steps: 1, weighing 45-60% by mass of polymethylene polyphenyl isocyanate, putting the polymethylene polyphenyl isocyanate into a first mixer, and stirring for 5 minutes; 2, weighing 20-35% by mass of all-water-blown flame-retardant rigid polyurethane foam combined polyether, putting the weighed all-water-blown flame-retardant rigid polyurethane foam combined polyether into a second mixer, adding 18-30% by mass of mica powder and 2-5% by mass of water, and mixing for 5-15 minutes; 3, pressurizing in a first mixer and a second mixer, conveying the two mixed raw materials into a mixing chamber through a conveying pipeline by high-pressure gas according to a formula proportion, mixing, then immediately spraying into a plate mold through a spray head for foaming, and preheating the plate mold to 35-60 DEG C; 4, after being filled with the raw materials, the plate mold is flattened through a compression roller.

Description

Technical Field

[0001] This invention relates to the field of sound insulation materials, and more particularly to a polyurethane-mica mixed foamed sound insulation material for walls and floors. Background Technology

[0002] Currently, the sound insulation panels used in the construction industry are not good enough, mainly due to problems with materials and manufacturing processes.

[0003] We have invented a new method for manufacturing sound insulation panels, which significantly improves various performance indicators compared to existing materials and can meet the needs of multiple fields. Summary of the Invention

[0004] The main objective of this invention is to provide a polyurethane-mica mixed foamed sound insulation board for walls and floors, so as to effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a polyurethane mica mixed foamed sound insulation board for walls and floors, comprising, by mass percentage, 45-60% polymethylene polyphenyl isocyanate (black material), 20-35% water-foamed flame-retardant polyurethane rigid foam composite polyether (white material), 18-30% mica powder, and 2-5% water.

[0006] A polyurethane-mica composite foamed sound insulation board for walls and floors, the manufacturing method of which includes the following steps: Step 1: Weigh 45-60% of polymethylene polyphenyl isocyanate (black material) by mass percentage, put it into the first mixer and stir for 5 minutes; Step 2: Weigh 20-35% of the water-blown flame-retardant rigid polyurethane foam polyether (white material) by mass percentage, put it into the second mixer, add 18-30% mica powder and 2-5% water, and mix for 5-15 minutes. Step 3: Pressurize the first and second mixers, and transport the two mixed raw materials to the mixing chamber set at the front end of the nozzle through two conveying pipes set on the first and second mixers. Mix them according to the formula ratio using high-pressure gas. Then, spray the mixture immediately into the board mold through the nozzle to foam. The board mold is preheated to 35-60 degrees Celsius. Step 4: After filling the mold with raw materials, flatten it with a pressure roller and remove the board.

[0007] Preferably, valves and flow meters are installed on the two conveying pipes of the first mixer and the second mixer to facilitate the mixing of the raw materials in the two mixers according to the formula ratio and then spraying them onto the plate mold.

[0008] Principle: Polyurethane itself has 80%-90% closed pores that block sound layer by layer through air, while the open pores reflect sound, thus playing a sound insulation role; mica has a multi-layered cavity structure, which also has the function of blocking and weakening sound layer by layer. The combination of polyurethane and mica can achieve a better sound insulation effect.

[0009] The beneficial effects of the present invention: Compared with existing products, the present invention significantly improves the sound insulation effect. Attached Figure Description

[0010] Appendix Figure 1 This is a schematic diagram of the device structure according to an embodiment of the present invention.

[0011] Appendix Figure 2 This is a schematic diagram illustrating the sound insulation principle of the present invention.

[0012] Appendix Figure 1 , 2 In the middle, there is a high-pressure pump 1, a pipeline 2, a first mixer 3, a second mixer 4, a valve A5, a valve B5-1, a flow meter A6, a flow meter B6-1, a mixing chamber 7, a mixing trolley 8, a nozzle 9, a plate mold 10, a pressure roller 11, a pressure roller trolley 12. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0014] Example 1 Appendix Figure 1 , 2 As shown, a polyurethane-mica composite foamed sound insulation board for walls and floors is manufactured using the following method: Step 1: Weigh 500 kg of polymethylene polyphenyl isocyanate (black material) and put it into the first mixer 3 and stir for 5 minutes; Step 2: Weigh 300kg of water-blown flame-retardant rigid polyurethane foam polyether (white material), 180kg of mica powder, and 20kg of water, put them into the second mixer 4, and mix for 10 minutes. Step 3: Start the high-pressure pump 1 and pressurize the first mixer 3 and the second mixer 4 through the pipeline 2. Adjust valves A5 and B5-1 and observe the flow rate of flow meters A6 and B6-1. The two mixed raw materials in the first mixer 3 and the second mixer 4 are transported to the mixing chamber 7 on the mixing cart 8 according to the formula ratio. The mixture is immediately sprayed into the board mold 10 through the nozzle 9 to foam. The board mold is preheated to 35-60 degrees. Step 4: After the board mold 10 is filled with raw materials, the board is flattened by the pressure roller 11 on the pressure roller carriage 12, and then the board can be removed.

[0015] Example 2 The process is the same as in Example 1, but the ingredients are changed to: 550 kg of polymethylene polyphenyl isocyanate (black material), 230 kg of water-blown flame-retardant polyurethane rigid foam polyether (white material), 200 kg of mica powder, and 20 kg of water.

[0016] Example 3 The process is the same as in Example 1, but the ingredients are changed to: 570 kg of polymethylene polyphenyl isocyanate (black material), 230 kg of water-blown flame-retardant polyurethane rigid foam polyether (white material), 160 kg of mica powder, and 40 kg of water.

[0017] The experimental data are summarized in Table 1: Table 1

[0018] Note: All test materials in the table are 20 mm thick, and the minimum airborne sound insulation and impact sound insulation tests are used.

[0019] As can be seen from the above experimental data, the three embodiments of the present invention outperform existing glass magnesium board and EPS / XPS materials in terms of sound transmission loss.

[0020] Polyurethane itself has 80%-90% closed pores that block sound through layers of air, while the open pores reflect sound, thus playing a sound insulation role. Mica has a multi-layered cavity structure that also has a layered sound-blocking and weakening function. The combination of polyurethane and mica can achieve a better sound insulation effect.

[0021] The beneficial effects of the present invention: Compared with the comparative example, the embodiment significantly improves the sound insulation effect.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polyurethane-mica composite foamed sound insulation board for walls and floors, characterized in that: By weight percentage, it includes 45-60% polymethylene polyphenyl isocyanate (black component), 20-35% water-blown flame-retardant rigid polyurethane foam polyether (white component), 18-30% mica powder, and 2-5% water.

2. A polyurethane-mica composite foamed sound insulation board for walls and floors, the manufacturing method of which includes the following steps: Step 1: Weigh 45-60% of polymethylene polyphenyl isocyanate (black material) by mass percentage, put it into the first mixer and stir for 5 minutes; Step 2: Weigh 20-35% of the water-blown flame-retardant rigid polyurethane foam polyether (white material) by mass percentage, put it into the second mixer, add 18-30% mica powder and 2-5% water, and mix for 5-15 minutes. Step 3: Pressurize the first and second mixers, and transport the two mixed raw materials to the mixing chamber set at the front end of the nozzle through two conveying pipes set on the first and second mixers. Mix them according to the formula ratio using high-pressure gas. Then, spray the mixture immediately into the board mold through the nozzle to foam. The board mold is preheated to 35-60 degrees Celsius. Step 4: After filling the mold with raw materials, flatten it with a pressure roller and remove the board.

3. A polyurethane-mica mixed foamed sound insulation board for walls and floors according to claim 2, characterized in that: In step 3, valves and flow meters are installed on the two conveying pipes connecting the first mixer and the second mixer to facilitate the mixing of the raw materials in the two mixers according to the formula ratio and then spraying them onto the plate mold.

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