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Polyolefin insulating material and preparation method thereof

An insulating material, polyolefin technology, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., can solve problems such as large gaps, and achieve the effect of improving heat resistance, simple process, and improving temperature resistance.

Active Publication Date: 2013-11-20
浙江太湖远大新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, in the industry, the temperature grade of 105°C and below can meet the requirements no matter whether XLPE, XLPVC or PVC is used. Above 150°C, the application of silicone rubber, fluoroplastics, polyimide and other varieties has also matured, but in the middle temperature grade (such as 125°C, 150°C) application development, there is a big gap with foreign countries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raise the temperature of the heating water tank of the shaking tank to 90±3°C,

[0028] Add 200 kg of LDPE, 140 kg of HT9025NX random copolymerized PP, and 60 kg of NAS30 SMMA into the shaking tank, turn on the vacuum pump and carry out vacuum drying for 30 minutes to dry and devolatilize. The absolute pressure is 0.005-0.02MPa. After completion, add 0.8 kg of cross-linking agent dicumyl peroxide DCP, 0.8 kg of antioxidant 1010, 0.4 kg of auxiliary antioxidant 168, and 0.4 kg of stearic acid. After adding, soak and mix, and roll for 2 hours. At this time, it is strictly prohibited Turn on the shaker vacuum pump. The soaking process is mainly based on the fact that the material is not wet. If it is not dry, the time of soaking and mixing (rolling) can be extended appropriately. After the infiltration is completed, put the material into the lower hopper under the shaking tank, and park it for 1 hour before pumping the material into the storage hopper. It cannot be pumped...

Embodiment 2

[0031] Raise the temperature of the heating water tank of the shaking tank to 90±3°C,

[0032] Add 240 kg of LDPE, 120 kg of HT9025NX random copolymerized PP, and 40 kg of NAS30 SMMA into the shaking tank, turn on the vacuum pump and carry out vacuum drying for 30 minutes for drying and devolatilization. After completion, add 1.2 kg of cross-linking agent di-tert-butyl peroxide DTPB, 0.6 kg of antioxidant 1010, 0.6 kg of anti-aging agent 168, and 0.8 kg of stearic acid. After adding, soak and mix, and roll for 2 hours. At this time, it is strictly forbidden to open Shake tank vacuum pump. The soaking process is mainly based on the fact that the material is not wet. If it is not dry, the time of soaking and mixing (rolling) can be extended appropriately. After the infiltration is completed, put the material into the lower hopper under the shaking tank, and park it for 1 hour before pumping the material into the storage hopper. It cannot be pumped immediately, and the residence...

Embodiment 3

[0035] Raise the temperature of the heating water tank of the shaking tank to 90±3°C,

[0036] Add 120 kg of LDPE, 120 kg of LLDPE, 120 kg of HT9025NX random copolymerized PP, and 40 kg of NAS90 SMMA into the shaking tank, turn on the vacuum pump and carry out vacuum drying for 30 minutes for drying and devolatilization, the absolute pressure is 0.005-0.02MPa, After drying and devolatilization, add 1.2 kg of cross-linking agent di-tert-butyl peroxide DTPB, 1.2 kg of antioxidant 300, and 0.8 kg of stearic acid, soak and mix after adding, and roll for 2 hours. At this time, it is strictly forbidden to turn on the shaker vacuum pump. The soaking process is mainly based on the fact that the material is not wet. If it is not dry, the time of soaking and mixing (rolling) can be extended appropriately. After the infiltration is completed, put the material into the lower hopper under the shaking tank, and park it for 1 hour before pumping the material into the storage hopper. It canno...

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Abstract

The invention discloses a polyolefin insulating material and a preparation method thereof. The insulating material comprises the following components in parts by weight: 50-60 parts of polyethylene, 30-35 parts of polypropylene random copolymers, 10-15 parts of styrene-methacrylate copolymers, 1-2 parts of antioxidants, 0.1-0.2 part of initiator, and 0.3-0.5 part of stearic acid. According to the polyolefin insulating material and the preparation method thereof disclosed by the invention, the vacuum drying is utilized, and an extruder is not used for devolatilization, so that the energy consumption is lowered; meanwhile, the process is simple. The polypropylene random copolymers and SMMA (Styrene Dimethyl Methacrylate) are added into the formula, so that the temperature-resistant level of the insulating material is improved, the using temperature is improved to 125 DEG C or higher from 90 DEG C, and the heat resistance of the material is improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyolefin insulating material and a preparation method thereof. Background technique [0002] The types of polyolefins used in the cable industry mainly include PE, PP, EVA and EEA, etc. Among them, the relatively large amount and long application history are mainly PE, which include HDPE, MDPE, LDPE, LLDPE and cross-linked XLPE. Their application Needless to say. The current application and development trends of polyolefins in the industry mainly focus on the following aspects: [0003] ⑴ Serialization and improvement of halogen-free low-smoke materials Halogen-free low-smoke flame-retardant cable materials are fast-growing varieties in recent years, and thermoplastic materials that meet the requirements of the IEC92-359 standard have been more and more widely used. With the requirements of cables for oil platforms, nuclear power plants, ships and other harsh e...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/14C08L25/08H01B3/44
Inventor 赵勇任金发陈庆贵李顺利郑颜
Owner 浙江太湖远大新材料股份有限公司
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