What are the differences between bakelite and 3240 epoxy board?

The main function of bakelite is insulation, while 3240 epoxy board is made of glass fiber cloth bonded with epoxy re...

The main function of bakelite is insulation, while 3240 epoxy board is made of glass fiber cloth bonded with epoxy resin and heated and pressed. It has high mechanical properties at medium temperature and stable electrical properties at high humidity. Let’s learn more about the details.

Due to its insulation, no static electricity, wear resistance and high temperature resistance, bakelite has become the insulation switch and variable resistor of electronic products, molds for machinery and fixtures on production lines, and can be used in transformer oil and other products.

Bakelite is a man-made synthetic chemical substance. Once heated and formed, it solidifies and cannot be molded into other things. It is named because of its non-absorbent, non-conductive, high temperature resistant and high strength characteristics, and is widely used in electrical products.

3240 epoxy board, also known as 3240 epoxy phenolic fiberglass cloth laminate, is yellow and black in color. This product is made of electrical alkali-free glass fiber cloth impregnated with epoxy phenolic resin and baked and hot pressed. 3240 epoxy board products have high mechanical and dielectric properties, good heat resistance and moisture resistance, and good machinability. The heat resistance grade is B. It is suitable for insulating structural parts in motors and electrical equipment, and can be used in humid environments and transformer oil.

3240 epoxy board board size: 1020*2020 mm, 1220*2020mm, 1220*2470mm, 1220*1220mm, 1020*1020 mm

Bakelite board, also known as bakelite board, is the full name of epoxy phenolic laminated paperboard. The color is orange and black. The specification size is 3-50mm*1000mm*1220/2000mm (thickness*width*length). Bakelite board uses high-quality bleached wood building paper and cotton linter paper as reinforcement, and is made of phenolic resin made by reacting high-purity, fully synthetic petrochemical raw materials as resin adhesive.

Characteristics of bakelite: good electrical properties at room temperature, good mechanical processing performance, specific gravity 1.45, warpage ≤3‰, with excellent electrical, mechanical and processing properties. Paper bakelite is the most common laminate, and it is also the most widely used and largest industrial laminate in the world.

The difference between 3240 epoxy board and bakelite:

3240 epoxy board refers to epoxy resin board reinforced with glass fiber, and the strength of epoxy resin board is much higher than bakelite. Bakelite is a phenolic plastic board. Bakelite has low toughness, poor elasticity, brittleness and hardness, and cannot be used as a bow arm.

1. The price difference is not big. Epoxy board is 23 to 43 yuan/Kg, while bakelite is about 19 to 57 yuan/kg.
2. The shrinkage rate is related to the composition and processing method of the resin.
3. In addition to the price and raw material advantages, bakelite has no advantages, and 3240 epoxy board is still easy to use.

Epoxy resin board is made of epoxy resin and glass cloth under high pressure, and bakelite board is made of phenolic formaldehyde, some powder and cotton cloth pressed together, so the performance of 3240 epoxy board is better than bakelite board, and bakelite board has higher physical processing performance than epoxy board.