What Is FR4 Sheet Material?

What kind of material is FR4 sheet? What are its characteristics and uses?

fr4 sheet is one kind of epoxy sheet, "fr" is the abbreviation of "flame retardant", and fr4 sheet is the flame retardant material which meets the grade of "fr4". fr4 sheet is heat and moisture resistant, insulating and flame retardant, and has good mechanical and dielectric properties. Heat and moisture resistance, insulation and flame retardant, and has good mechanical properties and dielectric properties, commonly used in circuit boards, a variety of switches, drilling pads and other production.

What is fr4 sheet?

fr4 sheet is a kind of epoxy sheet (epoxy resin sheet), which is a composite material made of epoxy resin, an organic polymer compound, and glass fiber. The "fr" is the English abbreviation for "flame retardant", and fr4 sheet is in line with the "fr4" flame retardant grade material.

There are many colors of fr4 sheet, such as white, black, green, blue and so on.

What are the properties of FR-4 epoxy sheet?

Why do you say FR-4 epoxy board good?FR4 epoxy board production using FR4 material, is also commonly known as epoxy board, epoxy board low cost, easy to manufacture and process, we produce FR-4 epoxy board can be cut into different sizes according to customer demand, and has high mechanical properties and dielectric properties: insulation board suppliers, good heat and moisture resistance, and good machinability.

FR-4 epoxy board has a wide range of uses, including electric motors ` electrical equipment for insulating structural parts, including various types of switches, electrical insulation ` carbon film printed circuit boards ` computer drilling pads ` mold fixtures, etc. (PCB test frame) and can be used in humid environmental conditions and transformer oil.

Various characteristics of epoxy board:

1.A variety of forms. Various types of resins, curing agents, modifiers system basically able to adapt to the requirements of various applications on the form pointed out.

2.Strong adhesion. Epoxy resin molecular chain inherent in the polar hydroxyl and ether bonds exist so that it has a high adhesion to various types of substances.

3.Mechanical properties. Cured epoxy resin system has good mechanical properties.

4.Low shrinkage. Epoxy resin and the reaction of the curing agent used is through direct addition reaction or epoxy resin molecule in the ring-opening polymerization reaction to carry out no water or other volatile by-products released.

5.Electrical properties. Cured epoxy resin system is a good insulating material with high dielectric properties, resistance to surface leakage, arc resistance.

6.Curing convenience. The use of various types of different curing agent epoxy resin system can basically be cured in the temperature range of 0-180 ℃.

7.Chemical stability. General cured epoxy resin system has good alkali resistance, acid resistance and solvent resistance. Like curing epoxy system of other characteristics of the same, chemical stability also depends on the resin and curing agent used. Moderate use of epoxy resins and curing agents, can make it has special chemical stability performance.

8. Dimensional stability. The combination of many of the above characteristics of the epoxy resin system has dimensional stability and durability.

9, Mold resistance. The cured epoxy resin system is resistant to most molds and can be applied in harsh tropical conditions.

2.Application of fr4 sheet

FR4 sheet has a wide range of uses, mainly used in electronics, electrical, communications, aerospace and other fields. The following are its main uses:

1. Circuit boards

In electronic manufacturing, FR4 sheet is usually used in the manufacture of circuit boards. It can be used as a substrate material for circuit boards to ensure the stability and reliability of circuit boards.

2. Spacer and isolation material

FR4 sheet has superb insulating properties and high temperature stability, so it can be used as a bulkhead and isolation material in the power system. This not only ensures the electrical safety of the equipment, but also avoids accidents caused by electrical faults.

3. Mechanical parts

FR4 sheet can also be used as a material for mechanical parts, such as machine tool partitions and automobile engine covers. It has excellent mechanical properties and chemical stability, and can be used in different mechanical systems.

In conclusion, FR4 sheet, as an important electrical material with excellent electrical properties, mechanical strength and chemical stability, is widely used in aerospace, communications, electronics, electrical and other fields. For electronic manufacturing enterprises, choosing high-quality FR4 sheet can help them improve product quality and market competitiveness.