Irradiation cross-linked insulating polyethylene master batch capable of resisting UVLED light attenuation and preparation method and application thereof

Abstract

The invention discloses irradiation cross-linked insulating polyethylene master batch capable of resisting UVLED light attenuation. The master batch comprises the following raw materials: matrix resin, a specific photoinitiator, a specific photoinitiation aid, an anti-reflection agent and a specific polyfunctional-group cross-linking aid, wherein the matrix resin is prepared from linear low-density polyethylene resin, a styrene-butadiene-styrene block copolymer, light-transmitting resin and a polyolefin elastomer (POE) and/or an ethylene-vinyl acetate copolymer. The master batch of the invention is high in initiation efficiency and low in processing temperature; customers can purchase matrix resin by themselves according to needs and then subject the matrix resin and the master batch disclosed in the invention to mixing and extrusion processing, so the problem that output efficiency is greatly reduced due to serious light attenuation in the prior art can be solved, and the master batchis convenient to use and easy to operate by the customers; and the insulating master batch provided by the invention can be directly added into existing conventional resin matrix for extrusion molding, and the advantages of processibility at low temperature and sufficient cross-linking degree can also be obtained.

Description

technical field [0001] The invention belongs to the field of ultraviolet light cross-linked polyethylene insulating materials, and in particular relates to an anti-UV LED light attenuation irradiation cross-linked polyethylene insulating masterbatch and a preparation method and application thereof. Background technique [0002] With the continuous progress of science, a new UVLED ultraviolet light source based on LED point light source has emerged. This light source is more energy-saving, environmentally friendly, mercury-free, can work under low temperature conditions, and has a longer service life. Specifically, compared with traditional high-pressure mercury lamps, UVLED has many characteristics: 1. Longer service life, about 35,000 hours; 2. Low energy consumption. Compared with traditional high-pressure mercury lamps, it can save energy by 90%; 3. Cold light source, no infrared heat radiation; 4. No mercury, safe and environmentally friendly; 5. Stable light output; 6. ...

AI Technical Summary

Problems solved by technology

[0003] At present, during the production and processing of polyethylene insulating materials for cables, the temperature of the extruder is as high as 170-190°C, and the temperature of the head is higher, as high as 195-210°C. Only in this temperature environment can the polyethylene material be melted completely and more transparent. At the same time, it is more conducive to the penetrating irradiation of ultraviolet rays, but the temperature of the cable prepared in this way is too high, resulting in a high ambient temperature in the ultraviolet irradiation equipment in the same room, high temperature coupled with long-term work, It caused serious light decay of the UVLED lamp bead light source, and the intensity of ultraviolet light decreased; according to the actual situation of the current cable factory: when the UVLED light source on the market is working for 18000-20000h during the normal cable extrusion process, it will cause the UVLED light source to break down. 15%-30% light decay, the result of this is that at the same extrusion speed, the degree of crosslinking of the cable insulation layer is not enough, showing that the thermal extension of the material is unqualified (that is, if the deformation is large under the action of heat and load, it will lose Mechanical properties, until it causes a short circuit, the cable cannot be used normally), and currently the following two methods are usually used to solve the above problems, one of which is to increase the light time by reducing the extrusion speed, but it will inevitably cause production efficiency. The cost of artificial water and electricity has increased significantly, so the overall cost has not decreased; another way is to replace the whole set of UVLED light source. The price of 45-60% of the equipment is about 110,000, that is to say, the light source needs to be replaced after more than 2 years of actual production and use of the whole set of equipment, which also greatly increases the cost of the cable factory

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