Views: 3 Author: Site Editor Publish Time: 2021-07-26 Origin: Site
Polyurea spray equipment is usually used in construction, mainly because polyurea has a strong anti-corrosion effect. Has a certain adhesion and strength. In order to improve the adhesion of the coating, it is necessary to strictly control the substrate used and improve it if necessary, so the polyurea spraying equipment has a variety of adhesion to the surface of the object. However.
1. Mechanical adhesion: Mechanical adhesion is related to the surface roughness of the object. In fact, the surface area of a rough surface is greater than that of a smooth surface, and the area where the coating adheres to the substrate also increases; combined with a certain rough shape, the coating forms a "straightened" bond with the surface of the rough substrate. , The adhesion will increase.
2. Chemical bond adhesion: The chemical bond produced by chemical reaction is an effective method for polyurethane sprayer coating to adhere to the surface of the object. An example is a metal hot-dip coating, which produces a mixture of steel and metallic zinc on the steel surface and melts each other. The silicate molecules in the inorganic zinc-rich primer also form chemical bonds with the steel surface. These bonds are the actual reaction between the chemical functional groups of the coating and the components of the substrate to form chemical bonds.
3. Polar adhesion: Compared with the adhesion caused by chemical bonds, the adhesion caused by polarity is more common in organic coatings. The polar adhesion of the polyurea sprayer is the attraction of resin molecules to the surface of the substrate. In this case, the resin acts like a weak magnet, attracting the opposite groups of the substrate from the north and south. This is the meaning of "extreme". In fact, the polar group is the positive or negative charge in the coating molecule, which can attract the opposite charge of the substrate.
The anticorrosive coating of polyurea spray equipment has low permeability and water permeability. You can use a base material with lower air permeability as a filler material. If peeling occurs during construction, it is caused by the surface of the building, so you must analyze the specific situation of the building.
HIGHTOP is pleased to announce our 2026 National Day holiday. We will be on vacation from Oct 1 to Oct 7 and resume work on Oct 8. Kindly arrange your equipment procurement, shipment and after-sales requests in advance to avoid delays. We wish all our customers a wonderful holiday!
Learn 6 essential polyurethane and polyurea spray application tips covering material consumption, spraying efficiency, vertical surfaces, and coating thickness.
HIGHTOP will exhibit mini excavators, lawn mowers, skid steer loaders and electric golf carts at the 140th Canton Fair, October 15–19, 2026. Visit booths 4.0C15–16 and 9.0B30.
High pressure polyurethane foam injection machines are essential equipment for modern PU foam production. This article explains the working principle, key components, high-pressure mixing technology, advantages, and industrial applications of polyurethane injection machines, helping manufacturers understand how to choose the right PU foaming equipment for automotive, furniture, insulation, and other industries.
From August 25 to 27, 2026, EV TREND KOREA 2026 — the three-day Seoul exhibition dedicated to new energy vehicles and charging infrastructure — successfully concluded. As one of the most influential new energy industry events in Korea, the show brought together global manufacturers of electric vehic
Choosing between a high-pressure and low-pressure polyurethane foam injection machine depends on production volume, foam quality requirements, mixing technology, operating costs, and application. This guide compares both systems in detail to help PU manufacturers select the right equipment for automotive parts, furniture, mattresses, insulation materials, and other foam products.
On August 13, 2026, Shandong Hightop Group officially opened its 2026 Mid-Year Sprint Awards & Summary Conference under the theme "Reviewing to Break Through, Tempering Excellence; United in Purpose to Create New Glory." With half of 2026 already behind the team, department heads and all business st
From August 25 to August 27, 2026, Hightop Group will participate in EV TREND KOREA 2026, one of Korea’s leading new energy vehicle and charging technology exhibitions, held at COEX Convention & Exhibition Center in Seoul.
Polyurethane (PU) foam has become an essential material in modern manufacturing due to its excellent thermal insulation performance, lightweight structure, flexibility, and long service life. Compared with traditional foam materials, polyurethane foam provides manufacturers with greater possibilitie
If you are buying your first polyurethane spray foam machine, or replacing an existing one, this guide walks you through the 8 factors that actually matter
