Phenolic back-up sheet┃Insulation material

Phenolic back-up sheet is a board made by special process. It is usually made of raw materials such as paper and resin by hot pressing. It has excellent insulation, mechanical and processing properties. Phenolic back-up sheet is so named because it can be processed by stamping process at room temperature, and is suitable for making insulation parts of various shapes and sizes.

Materials and composition of phenolic back-up sheets

The main materials of phenolic back-up sheets include paper and resin. Paper is usually bleached wood pulp paper, which has good insulation and mechanical strength; resin is mostly phenolic resin, which has excellent heat resistance, moisture resistance and dielectric properties. Through the hot pressing process, paper and resin are tightly combined to form a cold stamping board with high strength, high toughness and high insulation performance.

Performance characteristics of phenolic back-up sheet

Excellent insulation performance: Phenolic back-up sheet has high resistivity and breakdown voltage, which can effectively prevent the passage of current and ensure the safe operation of electrical equipment. Its insulation performance is stable and is not easily affected by environmental factors such as temperature and humidity.

Good mechanical properties: Phenolic back-up sheet has good toughness, strength and hardness, and is not easy to crack and delaminate. These characteristics enable phenolic back-up sheet to withstand large impact and shear forces during processing, ensuring the dimensional accuracy and surface quality of the product.

Excellent processing performance: Phenolic back-up sheet can be punched and sheared at low temperature and has high processing efficiency and low cost. At the same time, it also has good mechanical processing performance, and can perform processing operations such as drilling, milling, and grinding to meet the manufacturing needs of complex parts.

Good heat resistance and moisture resistance: Phenolic back-up sheet has good heat resistance and moisture resistance, and can maintain stable performance in harsh environments such as high temperature and humidity. This makes it have a wide range of application prospects in the insulation structure of motors and electrical equipment.

Application fields of phenolic back-up sheets

1. Electronic and electrical products

Insulating structural parts: Phenolic back-up sheets play a vital role as insulating structural parts of motors and electrical equipment, such as insulating base plates and partitions of switches, sockets, relays and other products. It can effectively isolate charged conductors of different potentials, prevent current leakage, and ensure the safe operation of electrical equipment.

PCB drilling machine and gong machine panel: In the production of PCB drilling machine and gong machine panel, phenolic back-up sheets are often used as pads. Due to its good processing performance and mechanical strength, phenolic back-up sheets can withstand the impact and shear force during the drilling process, ensuring processing accuracy and product quality.

2. Home appliance manufacturing field

In the manufacturing of home appliances such as refrigerators, washing machines, and air conditioners, phenolic back-up sheets are often used as materials for parts such as shells, liner, and brackets. Phenolic back-up sheets have good formability and processing performance, and can produce parts with complex shapes and precise dimensions. At the same time, their excellent insulation performance can also ensure the safe operation of home appliances.

3. Machinery manufacturing field

In the field of machinery manufacturing such as machine tools, molds, and tools, phenolic back-up sheets also play an important role. It is often used as a material for the production of various parts and structures, such as the base material of molds, the insulation board of machine tools, etc. The high strength and good processing performance of phenolic back-up sheets make machinery manufacturing more efficient and precise.