Low-temperature-resistant high-peel-strength heat shrinkable band and preparation method thereof

Abstract

The invention belongs to the field of anti-corrosion technologies for buried or overhead steel pipeline welded junctions and particularly relates to a low-temperature-resistant high-peel-strength heat shrinkable band and a preparation method thereof. The low-temperature-resistant high-peel-strength heat shrinkable band is characterized by containing the following ingredients in percentage by weight: 10% of EVA (Ethylene-Vinyl Acetate), 10% of calcium carbonate, 20% of SIS (Styrene-Isoprene-Styrene) elastomer, 22% of CPE (Chlorinated Polyethylene) particles, 28% of crosslinking agent and 10% of tackifier. The preparation method of the low-temperature-resistant high-peel-strength heat shrinkable band comprises the steps of compounding, coating, spraying, rolling, cooling and molding. The low-temperature-resistant high-peel-strength heat shrinkable band and the preparation method of the low-temperature-resistant high-peel-strength heat shrinkable band have the beneficial effects that the quake resistance and external force resistance of the heat shrinkable band are improved due to the addition of the CPE particles and the tackifier; the heat shrinkable band can be used at the temperature of -65 DEG C, is resistant to low temperature and has high peel strength; the binding strength between a hot-melt adhesive and a substrate is high, the wall thickness is uniform, no bubbles exist in colloids, the anti-corrosion and sealing effects are good, and the service life is long; and the sources of raw materials are broad, the preparation method is simple, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion technology for weld joints of buried or overhead steel pipelines, and in particular relates to a heat-shrinkable tape with low temperature resistance and high peeling strength and a preparation method thereof. Background technique [0002] As an important link connecting oil and gas production and market, pipeline transportation plays an increasingly important role in the oil and gas industry and even the national economy. Since steel pipelines are buried underground for a long time, they will be oxidized, damaged and corroded by soil, groundwater, air, plant roots, etc. The anticorrosion of steel pipes is an important means to prolong the service life of buried pipelines, so the anticorrosion of steel pipelines is also More and more people pay attention to it. Heat shrinkable tape has good sealing and bonding effect, and because it has no solvent, less pollution, and is easy to construct, ...

AI Technical Summary

Problems solved by technology

The minus 50°C anti-corrosion hot melt adhesive prepared by the present invention can ensure low-temperature toughness at minus 50°C, and can be peeled off at minus 20°C to achieve cohesive failure. The material can be used at low temperature, and the process is simple, but it is still unavoidable that the colloid will generate air bubbles during the coating process, which will affect the sealing effect, and the peel strength has not been improved.