Knowledge

Different countries have different requirements and regulations on the import and export of goods. We must understand the details of each country's import and export so that there will be no problems at critical times.

1. Development history of glass fiber industry (1) Development history of global glass fiber industry Glass fiber originated in the United States in the 1930s.

1. Insulating paper Plant fiber paper is divided into wood fiber, cotton fiber and hemp fiber. Among them, pure sulphate wood pulp fiber paper is the most commonly used.

FPC is also known as FPCB, a full name is a flex print circuit board, a scratch (Náo) circuit board or soft plate, refers to a printed circuit board made of flexible insulating substrate, is a PCB (Printed A Circuit Board. Compared to rigid printed wiring boards, it can be flavored, smaller, weight lighter, and the role of turning on and bridge in electronic products, making the product performance, smaller volume.

When Gene Roddenberry wrote "Star Trek" in a corner of the United States, a group of engineers are studying a less dangerous project, but this project has developed breakthrough and continues to affect the terminology of the PCB industry today.

FR4 sheet is a glass fiber epoxy resin coating plate, a substrate in a circuit board, which can be divided into general FR4 plates and high Tg FR4 sheets, and Tg is a glass conversion temperature, i.e., melting point. The circuit board must be flame-resistant and cannot be burned at a certain temperature, only can be soften. At this time, the temperature point is called the glass transformation temperature (TG point), which is related to the size stability of the PCB board.

Epoxy resin is a gligenic compound containing two or more epoxy groups in a general mean, and the most widely used epoxy resin variety in the world is bisphenol A epoxy resin, accounting for 80% of total consumption.

There are lots of solid insulation materials such as FR4 sheet, 3240 Epoxy Resin Sheet, and 3026 Phenolic Cotton Cloth Laminate Sheet.

In the middle of the 18th century, people could already process natural resins such as asphalt and rosin into man-made plastics. In the following just over a hundred years, plastics moved from the initial natural polymer processing stage to the synthetic material stage, solving the fatal problem of scarcity of raw materials. Then it flourished in the 1970s and became an indispensable existence in modern industrial production and life. At present, modified plastics have replaced traditional plastics and have become the most widely used materials such as FR4 sheet, 3240 Epoxy Resin Sheet and 3026 Phenolic Cotton Cloth Laminated Sheet, while also reflecting the cutting-edge technological level of modern materials science.