Thermoplastic polypropylene cable insulating material and preparation method thereof
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A cable insulation and polypropylene technology is applied in the field of thermoplastic polypropylene cable insulation material and its preparation.
Pending Publication Date: 2020-08-14
江苏瑞文新材料科技有限公司
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Abstract
Description
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Problems solved by technology
Polypropylene material has a high melting point and excellent electrical insulation properties. However, polypropylene is brittle at room temperature, which makes it difficult to use as a cable insulation material (He Jinliang, Peng Lin, Zhou Yao. Research progress on environmentally friendly high-voltage DC cable insulation materials [J]. High Voltage Technology, 2017,043(002):337-343.)
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Embodiment 1
[0023] (1) Add 25 parts of LDPE and 25 parts of LLDPE into the torque rheometer, raise the temperature to 120°C, stir at 40rpm for 30min, keep the temperature at 120°C during stirring, and obtain the mixed material;
[0024] (2) Raise the temperature of the torque rheometer to 150°C, add 50 parts of pp to the mixed material in step (1), stir at 40 rpm for 30 minutes, keep the temperature at 150°C during stirring, and obtain thermoplasticity after stirring Polypropylene cable insulation.
Embodiment 2
[0026] (1) Add 22 parts of LDPE and 22 parts of LLDPE into the torque rheometer, raise the temperature to 120°C, stir at 40rpm for 30min, keep the temperature at 120°C during stirring, and obtain the mixed material;
[0027] (2) Raise the temperature of the torque rheometer to 150°C, add 56 parts of pp to the mixed material in step (1), stir at 40 rpm for 30 minutes, keep the temperature at 150°C during stirring, and obtain thermoplasticity after stirring Polypropylene cable insulation.
Embodiment 3
[0029] (1) Add 20 parts of LDPE and 20 parts of LLDPE into the torque rheometer, raise the temperature to 120°C, stir at 40rpm for 30min, keep the temperature at 120°C during stirring, and obtain the mixed material;
[0030] (2) Raise the temperature of the torque rheometer to 150°C, add 60 parts of pp to the mixed material in step (1), stir at 40 rpm for 30 minutes, keep the temperature at 150°C during stirring, and obtain thermoplasticity after stirring Polypropylene cable insulation.
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Abstract
The invention relates to the technical field of insulating materials, in particular to a thermoplastic polypropylene cable insulating material and a preparation method thereof. The thermoplastic polypropylene material has high brittleness at room temperature so that the material is difficult to use as a cable insulating material; to solve this problem, the invention provides the thermoplastic polypropylene cable insulation material comprising, by weight, 50-60 parts of PP, 20-25 parts of LDPE and 20-25 parts of LLDPE. According to the invention, two polyethylene materials which are the LDPE and the LLDPE are added into a polypropylene matrix, so that the room-temperature brittleness of the polypropylene insulating material can be greatly improved, the application range of the polypropylenecable insulating material is greatly expanded, and the polypropylene cable insulating material has a good development prospect.
Description
technical field [0001] The invention relates to the technical field of insulating materials, in particular to a thermoplastic polypropylene cable insulating material and a preparation method thereof. Background technique [0002] At present, the most commonly used insulation material for DC plastic cables is cross-linked polyethylene. This material not only maintains the good electrical insulation properties of polyethylene, but also enhances the heat resistance of polyethylene. The cross-linking process also makes the ethylene molecules form a chain structure Transformed into a network structure, the mechanical properties of polyethylene at high temperatures have been greatly improved. However, the cross-linking process makes polyethylene change from a thermoplastic material to a thermosetting material, so it cannot be directly recycled after the cable life expires, and it does not have the characteristics of green environmental protection, and a large amount of waste XLPE ...
Claims
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Application Information
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