Melamine-epoxy glass fiber tube and preparation method thereof
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A technology of epoxy glass fiber and glass fiber tube is applied in the field of melamine and epoxy composite materials and their preparation, and can solve the problems of high brittleness, adverse effects on human body and environment, and low electrical strength.
Active Publication Date: 2020-04-21
SICHUAN DONGFANG INSULATING MATERIAL
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[0004] Melamine glass fiber tube is a special insulating composite material made of melamine resin glue impregnated with glass fiber cloth and cured by heating. Although melamine glass fiber tube has excellent arc extinguishing properties and halogen-free flame retardancy, it is lighter than ceramic insulating pipes. , high-strength characteristics, but the traditional melamine glass fib
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Embodiment 1-1
[0046] At room temperature, add 20 parts of methyl etherified melamine resin, 31 parts of o-cresol novolac epoxy resin, 35 parts of phosphorus-containing epoxy resin, and 13 parts of methyl ethyl ketone into the glue mixing tank, stir for 1 hour at room temperature, add 12 parts of 4,4-diaminodiphenylsulfone, stirred for 1.5 hours, then added 12 parts of inorganic powder aluminum hydroxide, 0.02 parts of accelerator 2-methylimidazole, and continued to stir at room temperature for 0.35 hours to fully disperse and evenly, Take a sample, and use the knife method to test the molding time of the glue solution (160°C hot plate) for 336 seconds, and the glue solution is prepared.
Embodiment 1-2
[0048] At room temperature, add 20 parts of polymerized partially methylated melamine resin, 27 parts of phenolic novolac epoxy resin, 33 parts of phosphorus-containing phenolic resin, and 15 parts of N,N-dimethylformamide into the compounding tank respectively. After stirring for 1.25 hours at room temperature, add 3 parts of curing agent dicyandiamide, stir for 0.5 hours, then add 18 parts of inorganic powder hydrotalcite and 0.01 part of accelerator 2-ethyl-4-methylimidazole, and continue stirring for 0.25 hours. After fully dispersing it evenly, take a sample, and test the molding time of the glue solution (160°C hot plate) for 242 seconds with a knife method, and the glue solution is prepared.
Embodiment 1-3
[0050] At room temperature, respectively add 20 parts of butylated melamine resin, 36 parts of hydantoin epoxy resin, 37 parts of phosphorus-containing phenolic resin, 8 parts of xylene, and 9 parts of methyl ethyl ketone into the compounding tank, and stir for 1.83 hours at room temperature , add 14 parts of curing agent m-phenylenediamine, stir for 0.65 hours, then add 19 parts of inorganic powder magnesium hydroxide, 0.1 part of accelerator boron trifluoride ethylamine, continue stirring for 0.75 hours, take samples, and use the knife method to test the glue The molding time of the liquid (160°C hot plate) is 312 seconds, and the glue liquid is prepared.
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Abstract
The invention discloses a melamine-epoxy glass fiber tube and a preparation method thereof. The melamine-epoxy glass fiber tube is characterized in that the melamine-epoxy glass fiber tube is an overlapped multi-layer tubular composite material prepared by rolling and pressing a halogen-free flame-retardant high-strength resin glass fiber cloth prepreg at 75-135 DEG C and carrying out curing and molding at 65-165 DEG C, wherein the prepreg is a glass fiber impregnated material which is formed by coating glass fiber cloth with a halogen-free flame-retardant high-strength resin adhesive and thenbaking the glass fiber cloth, and has a resin semi-cured product on the glass fiber cloth; and the halogen-free flame-retardant high-strength resin adhesive is prepared by mixing melamine resin, epoxy resin, a phosphorus-containing compound, a curing agent, inorganic powder, an accelerant and a solvent. The melamine-epoxy glass fiber tube is particularly suitable for fusing overload protection systems of power equipment in the industries of modern low-voltage power transmission and transformation, large and medium-sized power equipment, electric locomotives, photovoltaic (wind energy) power stations, large steel, engineering machinery and the like.
Description
technical field [0001] The invention belongs to melamine-epoxy composite material and its preparation, in particular to a melamine-epoxy glass fiber pipe and its preparation method. The melamine-epoxy glass fiber tube of the present invention is especially suitable for use in fuse and overload protection systems for power equipment in modern low-voltage power transmission and transformation, large and medium-sized electric equipment, electric locomotives, photovoltaic (wind energy) power stations, large steel, engineering machinery and other industries. Background technique [0002] The low-voltage fuse is an important protection device used to prevent short-circuit and severe overload when the power grid or electrical equipment has a short-circuit fault or overload, which can automatically cut off the circuit to avoid damage to electrical equipment and prevent accidents from spreading. [0003] Today, with the rapid development of global economy and technology, with the upg...
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