What Application Methods are Best for Polyurea?

Four application methods are currently used:

1. High pressure hot spray

This method consists of:

• Preparing the surface
• Mixing the component parts
• Performing the coating application

The high pressure method is chosen for very high volume coating jobs. Formulators must prepare a lower viscosity coating at operating temperature to ensure a favorable flow of the fluid within the machine and a uniform thickness on the surface.

During initial surface preparation, oily contaminants and dirt must be removed by means such as abrasive sand blasting. Surfaces should be checked for cleanliness to ensure strong adhesion of the polyurea coating. This is a critical step to ensure the coating's durability.

In the mixing stage the prescribed pressure and temperature range must be maintained. Component dosing and mixing must be done with precision. The spray system must be designed to maintain pressure as well as temperature.

The formulated mixture is sprayed on the clean de-dusted surface. The first coat is produced directly on the surface. A second coat is applied to ensure a leak-proof barrier.

Machines used for polyurea spray coatings must be able to maintain temperatures up to 80°C (176°F) and pressure up to 210 bars.

2. Warm spray coating

This method is chosen when the volume of the spray coating job is medium and formulators are able to ensure a low viscosity of fluid mix below 60°C (140°F).

3. Low pressure cold spray

In the case of cold spray, formulators must ensure low viscosity at ambient temperatures to enable spray coating. This is a convenient method for small surface area jobs and repairs.

4. Other methods

Roller or brush on methods are used when spraying is not feasible, such as a small pipe interior coating.

Amber Zhang Ms.

Foreign trade 

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

Fax: +86 (572) 2905222

Wechat: 15534631339

Website: www.ruicoglobal.com 

Email: [email protected]