Micro-crosslinked radiation-resistant flame-retardant cable sheath material and preparation thereof
A flame-retardant cable and radiation-resistant technology, which is applied in the field of materials, can solve the problems of air holes and difficulty in reaching the service life of nuclear power plants, and achieve the effects of improving heat resistance, avoiding the influence of pre-crosslinking, and improving crack resistance
Pending Publication Date: 2021-11-19
中广核高新核材科技(苏州)有限公司 +2
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Cables used in nuclear power plants require cable sheathing materials to have excellent radiation resistance, halogen-free, low-smoke and good flame retardancy. Most of the existing thermoplastic nuclear power plant cable sheathing materials meet the performance requirements of heat resistance and radiation resistance. A large number of polymers containing benzene rings are added to the system. The existence of benzene rings greatly improves the radiation resistance of the system, such as patent CN110724324 A, but the processing temperature of polymers containing benzene rings is relatively high. The polyethersulfone used in this patent The processing temperature of the resin is above 300°C, which is close to the decomposition temperature of polyolefin, which is likely to cause problems such as pores during material extrusion processing, and there are quality risks
[0003] In addition to radiation resistance and flame retardancy, cable materials for nuclear power plants also need to have long-term service life requirements, while conventional thermoplastic low-smoke halogen-free flame-retardant polyolefin cable materials are difficult to meet the service life requirements of nuclear power plants
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0031] (1) Put all the components in parts by weight in the formula in Table 1 into a banbury mixer and banbury to 155°C for discharge to obtain rubber compound;
[0032] (2) Melt, extrude and granulate the compound obtained in step (1) in a single-screw extruder at a temperature of 160° C., dry and package to obtain a micro-crosslinked radiation-resistant flame-retardant cable sheath Nesting plastic particles;
[0033] (3) Press the plastic particles of the micro-crosslinked radiation-resistant flame-retardant cable sheathing material into tablets with a flat vulcanizer, the temperature of vulcanization and pressing is 175° C., preheating for 5 minutes and vulcanization and pressing for 3 minutes to obtain a tablet with a thickness of 1 mm, and then Cool in a cold press to obtain a slightly cross-linked radiation-resistant and flame-retardant cable sheathing material.
[0034] Table 1 Formula of micro-crosslinked radiation-resistant flame-retardant cable sheathing material ...
Embodiment 2-5
[0037] On the basis of Example 1, replace POE-g-MAH with EVA-g-MAH, PE-g-MAH, PP-g-MAH or EPDM-g-MAH.
Embodiment 6-7
[0039] Magnesium hydroxide is replaced by aluminum hydroxide or magnesium hydroxide-aluminum hydroxide mixture on the basis of embodiment 1.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a micro-crosslinked radiation-resistant flame-retardant cable sheath material and preparation thereof, and belongs to the technical field of materials. The micro-crosslinked radiation-resistant flame-retardant cable sheath material comprises, by weight, 40-75 parts of EVA, 0.1-0.3 part of di-tert-butyl peroxide, 2-4 parts of vinyltrimethoxysilane, 10-25 parts of polyethylene, 10-20 parts of a compatilizer, 90-140 parts of an antioxidant, 30-50 parts of ultrafine polyimide powder, and 1.1-4.5 parts of an antioxidant. The micro-crosslinked radiation-resistant flame-retardant cable sheath material disclosed by the invention can generate a micro-crosslinking effect, has the advantages of long service life, good flame-retardant effect, high radiation resistance, high heat resistance and high cracking resistance, and can be widely applied to the aspects of large-size cables and the like.
Description
technical field [0001] The invention relates to the technical field of materials, in particular to a micro-crosslinked radiation-resistant flame-retardant cable sheath material and its preparation. Background technique [0002] Cables used in nuclear power plants require cable sheathing materials to have excellent radiation resistance, halogen-free, low-smoke and good flame retardancy. Most of the existing thermoplastic nuclear power plant cable sheathing materials meet the performance requirements of heat resistance and radiation resistance. A large number of polymers containing benzene rings are added to the system. The existence of benzene rings greatly improves the radiation resistance of the system, such as patent CN110724324 A, but the processing temperature of polymers containing benzene rings is relatively high. The polyethersulfone used in this patent The processing temperature of the resin is above 300°C, which is close to the decomposition temperature of polyolefi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C08L23/08C08L23/06C08L79/08C08L51/06C08F255/02C08F230/08H01B3/44
CPCC08L23/0853C08F255/026H01B3/441C08L2201/02C08L2203/202C08L23/06C08L79/08C08L51/06C08F230/085
Inventor马芝森谢飞
Owner中广核高新核材科技(苏州)有限公司