Fireproof sheet and preparation method thereof

Abstract

The invention provides a fireproof sheet and a preparation method thereof, and relates to the field of fireproof materials. The fireproof sheet consists of the following substances: 5-30 parts of a rubber matrix, 5-30 parts of a plasticizer, 5-25 parts of a heat-insulating filler, 20-50 parts of a flame-retardant filler, 5-25 parts of porcelainized powder and 0.1-2 parts of a small molecular auxiliary agent. The adhesive tape has excellent flexibility and self-adhesion, the release film can be torn off when the adhesive tape is used, the adhesive tape can be directly attached to areas and devices needing fire prevention, operation is convenient, the adhesive tape further has excellent fire prevention and heat insulation performance, and a product is ceramic, complete in structure, free of cracking and falling and the like under 1000-DEG C flame combustion.

Description

Technical Field

[0001] The invention provides a fireproof sheet and a preparation method thereof, and relates to the field of fireproof materials. Background Art

[0002] Fireproof sheet is a sheet material used for fire prevention and heat insulation. It is mainly made of refractory materials and has the functions of fire prevention, heat insulation, sound insulation, etc. It is widely used in the following fields:

[0003] 1. Construction industry: used for fireproof sealing of building structures, such as cable trays, ventilation ducts, door and window gaps, etc.

[0004] 2. Power industry: Wrap wires and cables to prevent fire from spreading along the lines in case of fire.

[0005] 3. Transportation: Used for fire isolation and line protection in vehicles, trains, ships and other means of transportation.

[0006] 4. Industrial field: fire protection of factory equipment, pipelines, etc.

[0007] 5. Communications industry: protect communications cables and ensure the normal operation of communications facilities during fires.

[0008] At present, the fireproof sheets on the market mainly include fireproof blankets, fireproof boards, fireproof tapes, ceramic silicone cloths, etc. The production process of fireproof boards and fireproof blankets is complicated, the production efficiency is low, the production cost is high, and they are not easy to cut during use, and the use area is limited. Fireproof tapes and ceramic silicone cloths will quickly lose their product integrity and fireproof effect when burned by flames above 1000°C. Therefore, a fireproof sheet and a preparation method thereof are proposed. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a fireproof sheet which is self-adhesive, easy to process and resistant to 1000°C flame combustion and a preparation method thereof.

[0010] In order to solve the above technical problems, the technical solution provided by the present invention is: a fireproof sheet, which is composed of the following substances by weight: 5-30 parts of rubber matrix, 5-30 parts of plasticizer, 5-25 parts of heat insulation filler, 20-50 parts of flame retardant filler, 5-25 parts of porcelain powder, and 0.1-2 parts of small molecule additives;

[0011] The rubber matrix is ​​chloroprene rubber;

[0012] The plasticizer is Tamanol520S;

[0013] The heat-insulating filler is one or a mixture of vermiculite, perlite, hollow glass microspheres, and expanded graphite;

[0014] The flame retardant filler is one or a mixture of aluminum hydroxide, magnesium hydroxide, ammonium polyphosphate, pentaerythritol, and melamine;

[0015] The porcelain powder is one or a mixture of silicon micropowder and low melting point glass powder;

[0016] The small molecule auxiliary agent is a mixture of one or more hindered phenol antioxidants and hindered amine light stabilizers;

[0017] Preferably, the chloroprene rubber Mooney viscosity [ML (1+8) 100°C] is 30-80.

[0018] Preferably, the heat insulating filler is vermiculite powder, and the mesh size of the vermiculite powder is 100-500 meshes.

[0019] Preferably, the flame retardant filler is a compound of ammonium polyphosphate, melamine and pentaerythritol.

[0020] Preferably, the ammonium polyphosphate, melamine and pentaerythritol are compounded in a ratio of 1:1:1 to 3:1:1.

[0021] Preferably, the particle size of the silicon powder is 0.1-50 μm, and the particle size of the low-melting-point glass powder is 0.1-30 μm and the melting point is 400-600°C.

[0022] Preferably, the fireproof sheet is composed of the following substances in parts by mass: 20 parts of rubber matrix, 10 parts of plasticizer, 20 parts of heat-insulating filler, 30 parts of flame-retardant filler, 20 parts of porcelain powder, and 1 part of small molecule additive.

[0023] A method for preparing a fireproof sheet:

[0024] Step 1, weigh each component according to the fireproof sheet formula, and knead them in a kneader to obtain a uniform rubber material;

[0025] Step 2: Extrude the obtained rubber material into sheets, cover with a release film, and roll up to obtain a finished product, the thickness of the finished product is 1-10 mm.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention has excellent flexibility and self-adhesiveness. When in use, the release film can be torn off and directly attached to the area and device requiring fire protection, which is easy to operate;

[0028] 2. The present invention has excellent fireproof and heat-insulating properties. Under the flame combustion of 1000°C, the product is ceramicized, with a complete structure and no cracking or falling off. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below.

[0030] The present invention provides a fireproof sheet, which is composed of the following substances by weight: 5-30 parts of a rubber matrix, 5-30 parts of a plasticizer, 5-25 parts of a heat-insulating filler, 20-50 parts of a flame-retardant filler, 5-25 parts of a porcelain powder, and 0.1-2 parts of a small molecule additive;

[0031] The rubber matrix is ​​neoprene;

[0032] The plasticizer is Tamanol520S;

[0033] The heat-insulating filler is one or a mixture of vermiculite, perlite, hollow glass microspheres, and expanded graphite;

[0034] The flame retardant filler is one or a mixture of aluminum hydroxide, magnesium hydroxide, ammonium polyphosphate, pentaerythritol, and melamine;

[0035] The porcelain powder is one or a mixture of silicon micropowder and low melting point glass powder;

[0036] The small molecule auxiliary agent is a mixture of one or more hindered phenol antioxidants and hindered amine light stabilizers.

[0037] Furthermore, the chloroprene rubber Mooney viscosity [ML (1+8) 100°C] is 30-80.

[0038] Furthermore, the heat insulating filler is vermiculite powder, and the mesh number of the vermiculite powder is 100-500 meshes.

[0039] Furthermore, the flame retardant filler is a compound of ammonium polyphosphate, melamine and pentaerythritol.

[0040] Furthermore, the compounding ratio of ammonium polyphosphate, melamine and pentaerythritol is 1:1:1 to 3:1:1.

[0041] Furthermore, the particle size of the silicon powder is 0.1-50 μm, and the particle size of the low-melting-point glass powder is 0.1-30 μm and the melting point is 400-600°C.

[0042] A method for preparing a fireproof sheet:

[0043] Step 1, weigh each component according to the fireproof sheet formula, and knead them in a kneader to obtain a uniform rubber material;

[0044] Step 2: Extrude the obtained rubber material into sheets, cover with a release film, and roll up to obtain a finished product, the thickness of the finished product is 1-10 mm.

[0045] Embodiment 1

[0046] The fireproof sheet is composed of the following substances by mass:

[0047] Rubber matrix 20 parts;

[0048] 10 parts of plasticizer;

[0049] 20 parts of thermal insulation filler;

[0050] 30 parts of flame retardant filler;

[0051] 20 parts of porcelain powder;

[0052] 1 part of small molecule additive.

[0053] The Mooney viscosity [ML(1+8)100℃] of chloroprene rubber is 46-60; the plasticizer is Tamanol520S from Japan's Arakawa Chemical Co., Ltd.; the thermal insulation filler is vermiculite powder with a mesh size of 325; the flame retardant filler is a compound of ammonium polyphosphate, melamine and pentaerythritol with a compound ratio of 2:1:1; the porcelain powder is a compound of silica micropowder and low-melting-point glass powder with a compound ratio of 4:1; the particle size of the silica micropowder is 1-30μm, the particle size of the low-melting-point glass powder is 1-10μm, and the melting point is 500℃; the small molecule additive is antioxidant 1010.

[0054] Weigh each component according to the above formula, knead them in a kneader to obtain a uniform rubber compound;

[0055] The obtained rubber material is extruded into sheets, covered with a release film, and rolled up to obtain a finished product, the total thickness of the finished product is 3 mm.

[0056] Comparative Example 1

[0057] The fireproof sheet is composed of the following substances by mass:

[0058] 30 parts of chloroprene rubber;

[0059] 20 parts of thermal insulation filler;

[0060] 30 parts of flame retardant filler;

[0061] 20 parts of porcelain powder;

[0062] 1 part of small molecule additive.

[0063] The Mooney viscosity of chloroprene rubber [ML(1+8)100℃] is 46-60; the thermal insulation filler is vermiculite powder with a mesh size of 325; the flame retardant filler is a compound of ammonium polyphosphate, melamine and pentaerythritol with a compound ratio of 2:1:1; the porcelain powder is a compound of silica micropowder and low-melting-point glass powder with a compound ratio of 4:1; the particle size of the silica micropowder is 1-30μm, the particle size of the low-melting-point glass powder is 1-10μm, and the melting point is 500℃; the small molecule additive is antioxidant 1010.

[0064] Weigh each component according to the above formula, knead them in a kneader to obtain a uniform rubber compound;

[0065] The obtained rubber material is extruded into sheets, covered with a release film, and rolled up to obtain a finished product, the total thickness of the finished product is 3 mm.

[0066] Comparative Example 2

[0067] The fireproof sheet is composed of the following substances by mass:

[0068] Neoprene 20 parts;

[0069] 10 parts of plasticizer;

[0070] 25 parts of thermal insulation filler;

[0071] 45 parts of flame retardant filler;

[0072] 1 part of small molecule additive.

[0073] The Mooney viscosity [ML(1+8)100℃] of chloroprene rubber is 46-60; the plasticizer is Tamanol520S from Arakawa Chemical Co., Ltd. of Japan; the thermal insulation filler is vermiculite powder with a mesh size of 325; the flame retardant filler is a compound of ammonium polyphosphate, melamine and pentaerythritol with a compound ratio of 2:1:1; and the small molecule additive is antioxidant 1010.

[0074] Weigh each component according to the above formula, knead them in a kneader to obtain a uniform rubber compound;

[0075] The obtained rubber material is extruded into sheets, covered with a release film, and rolled up to obtain a finished product, the total thickness of the finished product is 3 mm.

[0076] Performance test and test results

[0077] The fireproof sheets in Example 1 and Comparative Examples 1 and 2 were tested for performance, and the test method was as follows:

[0078] (1) Fire test: A 25*25 cm sample was attached to a steel plate and the sample surface was burned with a butane spray gun for 30 min. Observe whether the sample fell off the steel plate or whether the sample had any powder loss.

[0079] (2) Peel strength (for steel plate): refer to ASTM D1000-10.

[0080] (3) Softness: Fold the strip 180 degrees and observe the fold to see if there are any cracks or splits.

[0081]

[0082] After testing, the fireproof sheet in Example 1 is soft and bendable, and there is no cracking when folded in half. Under the combustion of butane flame, the fireproof sheet does not fall off the steel plate, does not crack, and does not shed powder. After combustion, the surface of the product maintains integrity, and has excellent thermal insulation and fireproofing effects and bonding strength. The fireproof sheet of Comparative Example 1 falls off the steel plate during the combustion process and loses its fireproof and heat-insulating effects. The fireproof sheet of Comparative Example 2 is not vitrified during the combustion process, and the product cracks, powders, loses integrity, and has poor fireproof and heat-insulating effects.

[0083] The present invention and its implementation methods are described above, which is not restrictive and is not limited to this. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A fireproof sheet, characterized in that: The fireproof sheet is composed of the following substances by weight: 20 parts of rubber matrix, 10 parts of plasticizer, 20 parts of heat insulation filler, 30 parts of flame retardant filler, 20 parts of porcelain powder, and 1 part of small molecule additive; The rubber matrix is ​​chloroprene rubber; The plasticizer is Tamanol520S; The heat-insulating filler is one or a mixture of vermiculite, perlite, hollow glass microspheres, and expanded graphite; The flame retardant filler is one or a mixture of aluminum hydroxide, magnesium hydroxide, ammonium polyphosphate, pentaerythritol, and melamine; The porcelain powder is one or a mixture of silicon micropowder and low melting point glass powder; The small molecule auxiliary agent is a mixture of one or more hindered phenol antioxidants and hindered amine light stabilizers.

2. A fireproof sheet according to claim 1, characterized in that: The chloroprene rubber Mooney viscosity [ML (1+8) 100° C.] is 30-80.

3. A fireproof sheet according to claim 1, characterized in that: The heat-insulating filler is vermiculite powder, and the mesh number of the vermiculite powder is 100-500 meshes.

4. A fireproof sheet according to claim 1, characterized in that: The flame retardant filler is a compound of ammonium polyphosphate, melamine and pentaerythritol.

5. A fireproof sheet according to claim 4, characterized in that: The ammonium polyphosphate, melamine and pentaerythritol are compounded in a ratio of 1:1:1 to 3:1:

1.

6. A fireproof sheet according to claim 1, characterized in that: The particle size of the silicon powder is 0.1-50 μm, and the particle size of the low-melting-point glass powder is 0.1-30 μm and the melting point is 400-600°C.

7. A method for preparing a fireproof sheet according to any one of claims 1 to 6, characterized in that: Step 1, weigh each component according to the fireproof sheet formula, and knead them in a kneader to obtain a uniform rubber material; Step 2: Extrude the obtained rubber material into sheets, cover with a release film, and roll up to obtain a finished product, the thickness of the finished product is 1-10 mm.

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