Resin Type Selection of FRP Gratings

Resin Type Selection of FRP Gratings

Common resin types for FRP gratings include unsaturated polyester resin, vinyl ester resin, epoxy resin, etc. The following are the characteristics and applicable scenarios of different resin types.

Unsaturated polyester resin

Phthalic unsaturated polyester resin:

relatively low price, with ordinary corrosion resistance, resistant to atmospheric aging, seawater corrosion, etc., long-term use temperature is -50℃ to 60℃, suitable for general industrial environments that do not require particularly harsh corrosion resistance, such as car washes, ordinary drainage ditch covers, greening tree protection boards, breeding industries, etc.

Isophthalic unsaturated polyester resin:

corrosion resistance is better than orthophthalic type, resistant to medium concentration of inorganic acid and alkali and various salts, long-term use temperature can reach -50℃ to 90℃, commonly used in walkways, platforms, etc. in municipal construction, and also suitable for relatively less corrosive areas in industries such as chemical and electroplating.

Resin Selection Chart
RESIN TYPE	GRATING TYPE	DESCRIPTION	APPLICATION
Vinyl Ester	Type VE	Superior corrosion resistance	Environment with high corrosion problems.
Flame resistant Vinyl Ester	Type VE-FR	Superior corrosion & Flame resitance	Environment with high corrosion requiring better flame resistance.
Isophthalic Polyester	Type IP	Industrial grade corrosion resistance	Used in the environments of normal or less concentration inorganic acid, alkali, etc
Flame resistant Isophtalic polyester	Type IP-FR	Industrial grade corrosion & Flame resistance	Used in les concentrated inorganic acidic areas requiring better flame resistance.
Orthophthalic polyester	Type OP	Moderate grade corrosion resistance	For use in environment which requires water & weather proof solution.

Vinyl ester resin:

 It has excellent corrosion resistance, especially for strong acid, strong alkali, salt, solvent and acid-base alternation and other harsh corrosion environments. The long-term use temperature is – 50℃ to 110℃. It also has good fatigue resistance and impact resistance, high tensile strength, and is often used in chemical industry, marine engineering, sewage treatment and other fields with extremely high corrosion resistance requirements, such as sulfuric acid plants, pharmaceutical plants, reaction pools around, offshore drilling platforms etc.

Epoxy resin:

It has excellent corrosion resistance, especially under the erosion of strong acid, strong alkali and solvent-type corrosive substances, it can provide better protection. It has high mechanical strength and rigidity, good bonding performance, small curing shrinkage, good dimensional stability, electrical insulation performance, water resistance and heat resistance are also outstanding, and it can maintain good performance at relatively high temperatures. It is suitable for environments requiring high strength, high corrosion resistance and high insulation, such as insulation platforms of electrical equipment, high corrosion areas of chemical equipment, aerospace and other high-end fields.