Flame-retardant composite material floor with sound isolating function and preparation method thereof
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A composite material and flame-retardant technology, applied in the direction of chemical instruments and methods, adhesive types, carboxyl rubber adhesives, etc., can solve the problem of poor overall mechanical properties such as impact resistance, poor matrix toughness, and failure to meet the use requirements and other issues to achieve optimal structural design and good matching
Inactive Publication Date: 2018-05-04
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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However, the toughness and brittleness of the matrix after curing of the phenolic resin are poor. For the sandwich structure of the composite floor, the lower mechanical properties of the s
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[0065] The preparation method of the fire-retardant composite material floor with sound insulation function, low smoke and low toxicity, and flame retardant of the present invention comprises the following steps:
[0066] 1) Preparation of fiber-reinforced phenolic resin hot-melt prepreg:
[0067] 1.1) Add industrial alcohol, E51 epoxy resin, carboxy-terminated nitrile rubber prepolymer, aluminum hydroxide and DOPO in sequence in the low-speed stirring state of phenolic resin, and then carry out high-speed stirring for 60-150 minutes, and finally mix the stirred The solution was ground by three rolls to obtain the modified phenolic solution. The speed of low-speed stirring is 50-100r / min; the speed of high-speed stirring is 300-750r / min:
[0068] The phenolic resin is liquid barium phenolic resin prepared with a aldehyde-phenol ratio in the range of 2.0:1-1.6:1.
[0069] The mass parts of said industrial alcohol, E51 epoxy resin, carboxyl-terminated nitrile rubber prepolymer...
Embodiment 1
[0097] Composite sandwich panels with a thickness of 20mm are required to be installed on rail transit vehicles as floors. The plane tensile strength requirements are ≥3.5MPa, the plane compression strength requirements are ≥5.0MPa, the sound insulation capacity is ≥33dB, and the flame retardancy meets the requirements of DIN5510. , the preparation method is:
[0098] 1) Preparation of skin prepreg with hot melt method
[0099] 1.1) Add 50kg of commercially available barium hydroxide catalyzed phenolic resin and 15kg of industrial alcohol into a 100L reaction kettle with self-heating and stirring functions, stir at a speed of 100r / min, then add 2.5kg of E51 epoxy resin, 2.5kg of Carboxyl-terminated nitrile rubber prepolymer and 1.5kg aluminum hydroxide and 0.5kg DOPO were stirred for 100 minutes at a rotating speed of 500r / min afterwards to obtain a modified phenolic resin solution;
[0100] 1.2) Evacuate the alcohol solvent in the modified phenolic resin solution obtained in...
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Abstract
The invention relates to a flame-retardant composite material floor with a sound isolating function and a preparation method thereof. The composite material floor comprises skin, a core material and adamping rubber layer, wherein the damping rubber layer is arranged between the skin and the core material and is separately connected to the skin and the core material in a bonding manner; the skin is prepared from a continuous fiber enhanced phenolic resin prepreg; the damping rubber layer is prepared from a polybasic damping rubber material by taking nitrile rubber as a base body; the core material is prepared from an aramid fiber paper honeycomb or a structural foam plastic. The composite material floor disclosed by the invention is simple in preparation process and good in economical benefit, and has the characteristics of being light in weight, load-bearing, environmental corrosion resistant, impact resistant and excellent in bending and compressing properties and the like. In particular, the sound isolating ability of the integral floor can reach up to 33dB which is remarkably higher than that of a conventional composite material floor. The composite material floor meets the demand on sound isolation and noise reduction in a traffic vehicle compartment, and the released smog and toxic gas are relatively low, and the flame-retardant composite material floor is excellent in flame retardance and can be fully popularized and applied to the field of rail traffic.
Description
technical field [0001] The invention relates to a composite material floor, in particular to a composite material floor for cabin structures with sound insulation and noise reduction effects, low smoke, low toxicity, and flame retardancy and a preparation method thereof, belonging to the technical field of functional composite materials. Background technique [0002] Composite flooring with a sandwich structure has been widely used in advanced large aircraft due to its high specific strength and specific stiffness, which plays a vital role in reducing its structural weight and achieving low operating costs. In recent years, with the rapid development of rail transit, there is also an urgent need for weight reduction and fire safety of interior materials in the car. It is the most feasible solution to replace existing metal products with products similar to aircraft composite flooring. However, the operating environment of rail transit vehicles is quite different from that of...
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