A kind of low-temperature high-adhesion polyethylene powder and its preparation method

Abstract

The invention discloses a low-temperature high-adhesion polyethylene powder and a preparation method thereof. The polyethylene powder is composed of a mixture of raw materials and additives, and the mass of the additive accounts for 2%-10% of the total mass of the raw material and the additive. Raw materials include linear low-density polyethylene 8320, metallocene polyethylene 5815, high-density polyethylene 8916, high elastic polymers and tackifying resins, and the additives include dispersants, plasticizers, leveling agents, adhesive monomers, Initiator and processing aid; The preparation method of polyethylene powder includes weighing, premixing, melt extrusion, cooling, crushing, and coarse sieving, and has good market application value.

Description

technical field [0001] The invention relates to polyethylene powder, in particular to a low-temperature high-adhesion polyethylene powder and a preparation method thereof. Background technique [0002] Pipeline and component anticorrosion plays an important role in the overall structure of the national economy, and is related to the safety of use and the service life of facilities in areas such as water transportation, oil transportation, gas transportation, and coal mines. The polyethylene powder coating film has excellent water resistance, acid and alkali resistance, chemical resistance, water absorption below 0.001%, good low temperature resistance, and no cracking at -40°C for more than 400 hours. Polyethylene powder coating endows the coating film with excellent leveling, soft texture and waxy feeling, and has been widely used in chemical equipment, chemical pipelines, chemical storage tanks, plates, wires, mechanical parts, light industrial appliances and food industri...

AI Technical Summary

Problems solved by technology

However, ordinary polyethylene powder has the following general technical problems: 1. Polyethylene powder has poor adhesion to difficult-to-bond metals, and it is difficult to form a stable and reliable bond. For example, the bonding of polyethylene powder to galvanized pipes, stainless steel and copper pipes Unsatisfactory; 2. At present, the commercialized polyethylene powder on the market requires the pipe to be preheated to a higher temperature (above 200°C) before coating, resulting in high energy consumption during construction, and it is easy to damage the adhered material, such as galvanized pipe Above 200°C will damage the galvanized layer; 3. After coating, the ports or solder joints and welds of pipe fittings and products are easy to degumming at low temperature, which affects the safe service life of the products; 4. In the method of producing polyethylene powder in the prior art, the powder thickness Uneven, resulting in waste of materials, resulting in uneven coating

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