Polyvinylidene fluoride-polyethylene composite material, preparation method thereof and insulator sheath

A polyvinylidene fluoride and composite material technology, applied in the field of materials, can solve the problems of low production efficiency, incomplete vulcanization of silicone rubber, long molding cycle of silicone rubber, etc. Effect

Inactive Publication Date: 2019-09-06
CHANGZHOU INST OF LIGHT IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing silicone rubber sheath is mainly subjected to a certain high temperature and necessary pressure, and is injected into a certain period of time, and vulcanized into a cured silicone rubber in the mold. Lead to incomplete vulcanization of silicone rubber; due to high processing temperature, the coupling agent on the mandrel is prone to cross-linking reaction, resulting in the sheath and mandrel cannot be bonded reliably as a whole; the injection molding cycle of silicone rubber is long and the production efficiency is low ; The silicone rubber vulcanization process is less environmentally friendly

Method used

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  • Polyvinylidene fluoride-polyethylene composite material, preparation method thereof and insulator sheath
  • Polyvinylidene fluoride-polyethylene composite material, preparation method thereof and insulator sheath
  • Polyvinylidene fluoride-polyethylene composite material, preparation method thereof and insulator sheath

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, this embodiment 1 provides a polyvinylidene fluoride-polyethylene composite material, which consists of: polyvinylidene fluoride: 10-50 parts; polyethylene: 10-50 parts; compatibilizer: 1 -10 parts; compatibilizer: 1-10 parts; flame retardant: 5-35 parts; lubricant: 0.1-1 part; and antioxidant: 0.5-3 parts. Preferably, the polyvinylidene fluoride is 15-25 parts.

[0022] Melt flow rate (MFR) is at a certain temperature and pressure, the resin melt passes through the standard capillary, the unit is g / 10min. Melt flow rate is an important reference for selecting plastic processing materials and grades, which can make the selected raw materials better meet the requirements of processing technology, and improve the reliability and quality of products in molding. Therefore, in plastic processing, by measuring the flow rate of plastics, the structural factors of polymers can be studied to measure the fluidity of plastic melts.

[0023] Optionally...

Embodiment 2

[0036] See figure 1 , on the basis of Example 1, this Example 2 provides a method for preparing a polyvinylidene fluoride-polyethylene composite material, including the following steps: Step S1, adding the main material and auxiliary materials into the twin-screw extruder respectively, Through shearing, melting and mixing under the action of the screw; step S2, die drawing, that is, drawing into strips through the die; and step S3, cutting into pellets.

[0037] Optionally, the main ingredients include: polyvinylidene fluoride: 10-50 parts; polyethylene: 10-50 parts; compatibilizer: 1-10 parts; compatibilizer: 1-10 parts.

[0038] Optionally, the auxiliary materials include by weight: flame retardant: 5-35 parts; lubricant: 0.1-1 part; antioxidant: 0.5-3 parts.

[0039]The specific preparation steps are as follows: First, add 10-50 parts of polyvinylidene fluoride, 10-50 parts of polyethylene, 1-10 parts of compatibilizer, and 1-10 parts of compatibilizer into a double-cone s...

Embodiment 3

[0042] On the basis of Embodiment 1 and Embodiment 2, this Embodiment 3 provides an insulator sheath, including: the polyvinylidene fluoride-polyethylene composite material as described above; the polyvinylidene fluoride-polyethylene The composite material is suitable for premolding, injection, pressure holding and cooling forming by an injection molding machine, that is, the insulator sheath.

[0043] Optionally, the temperature of the injection molding machine is set at 175-220°C, and may be 190°C, 200°C, or 210°C.

[0044] Regarding the component content of the polyvinylidene fluoride-polyethylene composite material and the specific implementation process, please refer to the relevant discussions of Examples 1 and 2, and will not be repeated here.

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Abstract

The invention belongs to the field of materials, and particularly relates to a flame-retardant high-pressure resistant polyvinylidene fluoride-polyethylene composite material, a preparation method thereof and an insulator sheath. The polyvinylidene fluoride-polyethylene composite material comprises the following components in parts by weight: 10-50 parts of polyvinylidene fluoride; 10-50 parts ofpolyethylene; 1-10 parts of a compatilizer; 1-10 parts of a compatibilizer; 5-35 parts of a flame retardant; 0.1 to 1 part of a lubricant; and 0.5 to 3 part of an antioxidant. The polyvinylidene fluoride-polyethylene composite material has better moisture flash prevention and anti-pollution flash prevention capabilities, and the arc resistance and flame retardancy of the composite material are improved by adding the flame retardant into the raw material formula. In addition, the raw materials in the composite material are nontoxic, no waste gas, waste material and waste water are generated inthe production process, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to the field of materials, in particular to a polyvinylidene fluoride-polyethylene composite material, a preparation method thereof, and an insulator sheath. Background technique [0002] Composite insulators began in the 1950s in the world and have a history of more than 40 years. my country's silicone rubber insulators have been produced and operated for more than ten years. There are thousands of domestic high-voltage composite insulators in the power system. During operation, with the implementation of my country's UHV power transmission project and the further development of the West-to-East Power Transmission Project, the demand for high-voltage composite insulators will increase significantly. [0003] Composite insulators generally consist of three parts: fiberglass and epoxy resin lead rods, silicone rubber sheds, and hardware. Among them, the silicone rubber shed is the outer insulating part of the composite insulator. I...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L27/16C08L31/04C08L23/08C08L51/06C08L83/04C08K13/02C08K3/32C08K5/134C08K5/526H01B3/44
CPCC08L23/06C08L23/0815C08L27/16C08L2201/02C08L2203/202C08L2205/035H01B3/441H01B3/445C08L31/04C08L23/0853C08L23/0869C08L51/06C08L83/04C08K13/02C08K3/32C08K5/1345C08K5/526
Inventor 刘敏徐应林
Owner CHANGZHOU INST OF LIGHT IND TECH
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