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Nuclear power 1E-level K3-type thermal shrinkage material and preparation process

A heat shrinkable, nuclear power technology, applied in the field of cable accessories manufacturing, to achieve the effect of improving flame retardant performance and temperature resistance

Active Publication Date: 2012-07-18
中科英华长春高技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a new challenge for domestic heat shrinkable materials

Method used

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  • Nuclear power 1E-level K3-type thermal shrinkage material and preparation process

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Experimental program
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Effect test

Embodiment 1

[0020] 150g POE (model 8999), 355g EVA (model 18-3), 10g antioxidant AT-10, 200g aluminum hydroxide after coupling treatment, 115g magnesium hydroxide after coupling treatment, 35g after coupling treatment Nitrogen-based flame retardant (FR-PN), 15g of EPDM 4045 was added to the internal mixer, mixed for 20 minutes at 135°C, and then 20g of lubricant stearic acid, 15ml of sensitizer (TMPTA) and 12ml tin methyl mercaptide heat stabilizer, knead for 10 minutes. Obtain the masterbatch of 1E grade K3 heat-shrinkable material, press the material with a hydraulic press to prepare samples, and then irradiate 150KGy with an electron accelerator to obtain nuclear power 1E grade K3 heat-shrinkable material 1 # .

Embodiment 2

[0022] Mix 150g POE (model 8999), 350g EVA (model 14-2), 10g antioxidant 7910, 175g aluminum hydroxide after coupling treatment, 100g magnesium hydroxide after coupling treatment, 75g nitrogen-based barrier after coupling treatment Fuel agent (FR-PN), 15g of EPDM rubber into the internal mixer, mixing at 135°C for 20 minutes, then add 20g of lubricant zinc stearate, 10ml of sensitizer (TMPTA) and 12ml of methyl sulfide The tin alcohol heat stabilizer was kneaded for 10 minutes. Obtain the masterbatch of 1E grade K3 heat-shrinkable material, press the material with a hydraulic press to prepare samples, and then irradiate 170KGy with an electron accelerator to obtain nuclear power 1E grade K3 heat-shrinkable material 2 # .

Embodiment 3

[0024] 160g POE8999, 350EVA1405, 10g antioxidant 1010, 175g aluminum hydroxide after coupling treatment, 125g magnesium hydroxide after coupling treatment, 50g nitrogen-based flame retardant (FR-PN) after coupling treatment, 15g silicon Rubber and 12ml of tin mercaptide heat stabilizer were added to the internal mixer, and the mixture was mixed for 20 minutes at 135°C, then 20g of lubricant flyaway and 10ml of sensitizer (TMPTA) were added, and kneaded for 10 minutes. Obtain the masterbatch of 1E grade K3 heat-shrinkable material, press the material with a hydraulic press to prepare samples, and then irradiate 170KGy with an electron accelerator to obtain nuclear power 1E grade K3 heat-shrinkable material 3 # .

[0025] The obtained sample performance index:

[0026] 1. Material thermal life evaluation:

[0027] 1) Thermal life evaluation method:

[0028] According to the IEC60216 standard and the IEEE383-2003 standard, the mathematical model recommended for the accelerated...

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Abstract

The invention provides a nuclear power 1E-level K3-type thermal shrinkage material and a preparation process. Prepared polyolefin resin, flame retardant, antioxidizer, thermal stabilizer and modifyingagent are led into and mixed in an internal mixer; after polyolefine is melted, plastic processing aid is added, and masterbatch of the 1 E degree K3 thermal shrinkage material can be obtained afterthe operation of mixing is carried out; and after being pressed into pieces by an oil hydraulic press or being extruded by an extruding machine, the masterbatch is irradiated by an electron accelerator so as to obtain the 1E-level K3-type thermal shrinkage material. The coordination effect of nitrogen-containing flame retardant, halogen-free flame retardant aluminium hydroxide and magnesium hydroxide system is utilized to improve the flame retardant property and the temperature-resistance property; and the selected plastic modifying agent, i.e. ethylene propylene terpolymer rubber, silicon rubber, and thermal stabilizer, i.e. methyl tin mercaptide, are respectively conducive to improving temperature grade of the system, thereby meeting the higher requirement of enabling the service life toreach 40 years at the temperature of 90 DEG C under the circumstance that the system keeps other properties at an excellent state.

Description

technical field [0001] The invention relates to a nuclear power 1E grade K3 heat-shrinkable material, and also provides a preparation process of the heat-shrinkable material, which belongs to the technical field of cable accessory manufacturing. Background technique [0002] Nuclear power plant 1E heat-shrinkable cable accessories refer to the safety level of electrical system equipment that completes the emergency shutdown of the reactor; isolation of the containment, emergency cooling of the core, export of residual heat from the reactor, heat export from the containment of the reactor, and prevention of discharge of radioactive substances to the surrounding environment. Products are divided into three categories according to the safety category of electrical system equipment in nuclear power plants: K1, K2, and K3. [0003] Among them, K3 products are installed outside the containment of nuclear reactors, and can still perform their prescribed functions under normal envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/16C08L83/04C08K13/02C08K3/22C08K5/37B29C43/00B29C47/00B29C71/04B29B7/28
Inventor 戚云霞李素清王艳淼宋文玲
Owner 中科英华长春高技术有限公司
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