Silane crosslinked polyethylene insulating material for heating cable and preparation method and application thereof

A polyethylene insulation and heating cable technology, applied in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of unsatisfactory heating cables, and the temperature resistance level is only about 90 °C, and achieve excellent physical and mechanical properties. Overcome the effects of poor high temperature resistance and low cost

Active Publication Date: 2019-03-08
JIANGSU DEWEI ADVANCED MATERIALS
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cross-linking modification is an important means to improve the heat resistance and weather resistance of polyethylene. Among them, silane cross-linking is one of the cross-linking methods of polyethylene. Some heating cable manufacturers are trying to use silane cross-linking polyethylene. Insulating materials are used in the manufacture of heating cables. However, the current temperature resistance of silane cross-linked polyethylene insulating materials for cables is only about 90°C, which is only suitable for power cables and cannot meet the needs of heating cables. Chinese utility model patent CN204145784U, which discloses A single-conductor heating cable with a silane cross-linked polyethylene insulating layer is provided, which has an alloy heating wire, the alloy heating wire is wrapped with a silane cross-linked polyethylene insulating layer, and the silane cross-linked polyethylene insulating layer is wrapped with a filling layer. A number of metal grounding wires are evenly distributed in the filling layer, and the filling layer is wrapped with a metal electromagnetic shielding layer, and the metal electromagnetic shielding layer is wrapped with a PVC sheath. This patent mentions that it can work at 100-120°C for a long time, but the actual production The silane cross-linked polyethylene commonly used in the process cannot achieve this effect, and the temperature resistance level is only about 90°C

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silane crosslinked polyethylene insulating material for heating cable and preparation method and application thereof
  • Silane crosslinked polyethylene insulating material for heating cable and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a silane cross-linked polyethylene insulating material for heating cables. The raw materials and dosages used are shown in Table 1, wherein,

[0039] Among the raw materials of silane grafting material: The first high-density polyethylene is the high-density polyethylene produced by Qilu Petrochemical. The grade is: TR144, and the melt index is 0.3g / 10min;

[0040]The bimodal polyethylene is produced by Borealis, the grade is: FB2230, and the melt index is 0.2g / 10min;

[0041] The grade of polypropylene selected from PetroChina Dushanzi is: EPF30R;

[0042] The silane crosslinking agent is a mixture of vinyltrimethoxysilane, vinyltriethoxysilane and vinyl-tris(2-methoxyethoxy)silane in a weight ratio of 1:1:2 ;

[0043] Grafting initiator is dicumyl peroxide;

[0044] The first lubricant is a fluorine-containing rheological agent ppa, purchased from 3M Company;

[0045] The first antioxidant is antioxidant 300;

[0046] Among the raw mat...

Embodiment 2

[0057] This embodiment provides a silane cross-linked polyethylene insulating material for heating cables. The raw materials and dosages used are shown in Table 1, wherein,

[0058] The first high-density polyethylene is high-density polyethylene produced by Qatar Chemicals, the brand is TR131, and the melt flow rate is 0.2g / 10min; the silane crosslinking agent is vinyltrimethoxysilane. Other raw materials are identical with embodiment 1.

[0059] The preparation method is the same as in Example 1.

Embodiment 3

[0061] This embodiment provides a silane cross-linked polyethylene insulating material for heating cables. The raw materials and dosages used are shown in Table 1, wherein,

[0062] The first lubricant is a mixture of fluorine-containing rheological agent PPA and microcrystalline wax in a weight ratio of 1:1, and the grafting initiator is 1,1-di-tert-butyl peroxide-3,3,5 - Trimethylcyclohexane. Other raw materials are identical with embodiment 1.

[0063] The preparation method is the same as in Example 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

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to view more

Abstract

The invention discloses a silane crosslinked polyethylene insulating material for a heating cable and a preparation method and application thereof. The insulating material is formed by mixing a silanegrafting material and crosslinking catalyst masterbatch, the silane grafting material comprises a crosslinking catalyst, a second lubricant and a second oxidant, polyolefin resin is composed of firsthigh-density polyethylene, double-peak polyethylene and polyethylene, and the crosslinking catalyst masterbatch comprises second high-density polyethylene and linear low-density polyethylene. The preparation method includes: respectively preparing the silane grafting material and the crosslinking catalyst masterbatch, and proportionally packaging to obtain the insulating material. The applicationrefers to application of the insulating material in producing the heating cable. The insulating material can be used for a long time at 125 DEG C while maintaining excellent physical and mechanical performance and is safe, environment-friendly and low in cost.

Description

technical field [0001] The invention belongs to the field of heating cables, and in particular relates to a silane crosslinked polyethylene insulating material for heating cables and a preparation method and application thereof. Background technique [0002] Heating cables are made of cable structures, use electricity as energy, and use resistance wires to generate heat, so as to achieve heating and heat preservation effects, and are widely used in floor heating, snow melting and ice melting. The low-end products of the existing heating cable insulation layer are mainly non-crosslinked ordinary polyethylene and polyvinyl chloride, but the high temperature resistance is relatively poor, and polyvinyl chloride is still lacking in environmental protection; the high-end is now mainly using Although polytetrafluoroethylene and silicone rubber have good heat resistance, they are expensive and unfavorable for large-scale application. [0003] Therefore, the current market needs an...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L23/08C08L51/06H01B3/44
CPCC08L23/06C08L2203/202C08L2205/035C08L2312/08H01B3/441C08L23/12C08L23/0815C08L51/06
Inventor 杨俊徐俊童晨
Owner JIANGSU DEWEI ADVANCED MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap