Exploring the 3240 Epoxy Sheet: Features and Industrial Benefits

What is 3240 epoxy sheet?

3240 epoxy sheet is an insulating material that mainly composed of electrical fiber glass cloth impregnated with epoxy resin and processed through drying and hot pressing. The temperature resistance grade of 3240 epoxy sheet is Class B. Its colors include yellow, red, green, and black. It complies with the standard GB/T1303.1-1998 (natural color). The surface of 3240 epoxy sheet should be smooth, free of bubbles, pits, and wrinkles, but it can have other defects that do not affect its use, such as scratches, indentations, stains, and minor spots. The edges should be neatly cut. And the end faces should be free from delamination and cracks. The thickness of 3240 epoxy sheet is typically 0.5 to 50mm, but can also be produced in thicknesses of 50 to 150mm as required.

What are the features of the 3240 epoxy sheets?

1. Stable physical properties

Low shrinkage: During the curing process, the reaction of the 3240 epoxy sheet with the curing agent is carried out by direct addition reaction or ring-opening polymerization of the epoxy group. And no water or other volatile byproducts are released, so the shrinkage is extremely low (less than 2%), which helps to reduce deformation and stress concentration during the processing.

High strength: The cured epoxy resin system has excellent mechanical properties, high mechanical strength at medium temperature, which can make it withstand large loads and not easy to break.

Good dimensional stability: Due to its low shrinkage and high strength characteristics, the 3240 epoxy sheet can maintain a stable size during long-term use and is not easy to deform or warp.

2.Excellent electrical performance

High dielectric properties: The cured epoxy resin system has a very high dielectric constant and low dielectric loss, which can effectively isolate the electric field and prevent current leakage.

Arc resistance: Under the action of the arc, the 3240 epoxy sheet can maintain stable insulation performance and is not easy to be broken down or melted, so as to protect the safety of the circuit and equipment.

Surface leakage resistance: The surface is smooth and has no pores, which can effectively prevent the current from flowing on the surface and improve the insulation effect.

3.Excellent processing performance

Easy cutting and drilling: Machining operations such as cutting and drilling 3240 epoxy sheets can be easily performed with the right tools and processes.

Strong plasticity: Through heating and pressure and other process means, the 3240 epoxy sheet can be bent, folded and other molding operations to meet the needs of various complex shapes.

High bonding strength: The polar hydroxyl and ether bonds inherent in the molecular chain of 3240 epoxy sheet make it have high adhesion to various substances, which is convenient for firm bonding with other materials.

4.Strong environmental adaptability

High temperature resistance grade: Its temperature resistance grade reaches B, which can maintain stable insulation performance in high temperature environment.

Good corrosion resistance: 3240 epoxy sheet has good resistance to corrosive media such as oil, water, acid and alkali, and can be used in humid and corrosive environment for a long time without being affected.

Excellent flame retardant performance: Some 3240 epoxy sheet products also have flame retardant performance, which can slow down the spread of fire in the fire and protect the safety of equipment and personnel.

As a kind of high performance composite material, 3240 epoxy sheet plays an important role in modern industry. The details are as follows:

First, let's focus on its electrical properties. The 3240 epoxy sheet has an extremely low dielectric constant and dielectric loss, which makes it excellent in high-frequency electronic devices. In the field of communications, the construction of 5G base stations cannot be separated from high-performance insulation materials. 3240 epoxy sheet with its excellent electrical characteristics can effectively reduce the loss in signal transmission and improve the quality of communication.

In terms of heat resistance, the 3240 epoxy sheet can withstand temperatures of up to 150℃ or even higher, and remains stable in a high temperature environment for a long time. This feature makes it used in battery packs for new energy vehicles. The battery pack will generate a lot of heat when working. And 3240 epoxy sheet can be used as an insulating partition between batteries, which can ensure the safe isolation of the battery and can withstand high temperature environment to ensure the normal operation of the battery system.

The mechanical strength of 3240 epoxy sheets is also a highlight. The 3240 epoxy sheet has high tensile, bending and compressive strength, which makes it an advantage in the manufacture of parts with complex structures and heavy loads. For example, in wind power generation equipment, the structural parts inside the blades often need to have high strength and high reliability. The 3240 epoxy sheet is an ideal choice.

When it comes to chemical resistance, 3240 epoxy sheets have good resistance to a variety of organic solvents, oils and corrosive gases. In the petrochemical industry, the lining of pipelines and storage tanks is often made of 3240 epoxy sheet, which can prevent chemical substances from eroding the equipment and extend the service life of the equipment.

In addition, 3240 epoxy sheet also has good processing performance. It can be processed into various shapes and sizes of parts by cutting, drilling, milling and other ways to meet the needs of different application scenarios.