Polytetrafluoroethylene (PTFE)‘s Introduction

Polytetrafluoroethylene (referred to as PTFE) is a polymer compound formed by the polymerization of tetrafluoroethylene. In the molecular structure of PTFE, fluorine atoms replace hydrogen atoms in polyethylene. Due to the extremely high electronegativity of fluorine atoms, the fluorocarbon bond is extremely strong, and the molecular structure is in a helical conformation. This also endows PTFE with a variety of excellent physical and chemical properties.

PTFE is the world's first industrially produced fluororesin and is also the fluororesin variety with the largest production scale so far. It is also known as the "king of plastics".

In 1953, PTFE fiber was first developed and used by DuPont Company in the United States. Industrial production began in 1957. In the 1980s, soluble PTFE fiber was put into production, mainly monofilament. From 1984 to now, the total world production capacity of PTFE fiber has reached 1.2 kilotons.

Characteristics of Polytetrafluoroethylene (PTFE)

Excellent chemical stability, excellent corrosion resistance, resistant to strong acids, strong alkalis, water and various organic solvents. Strong high-temperature and low-temperature resistance (working temperature range -190 degrees Celsius - 260 degrees Celsius).

Non-stick, strong lubricity, friction coefficient ≤ 0.1.

Excellent electrical insulation performance and radiation resistance.

Low water absorption rate (about 0.001% - 0.005%).

Large linear expansion coefficient, prone to cold flow, and difficult for molding and secondary processing.

Vision: opaque, adjustable texture and gloss.

Touch: lubricated.

Hearing: low pitch.

Smell: odorless.

Form: powder, fiber, coating, film material, sheet.

Applicable processes: compression molding, high-temperature calendering molding, wet spinning.

Applications: PTFE coating - in the fields of sealing, anticorrosion, non-stick and lubrication, such as magnet stir bar used in laboratory

PTFE fiber - in the fields of high-temperature filter bags, protection, medical treatment and other fields.

PTFE microporous membrane - in the fields of solid-liquid filtration, solid-gas filtration, oil-water separation, waterproof and moisture-permeable textile clothing, medical devices and tissue filling scaffolds.

PTFE composite material - in the fields of automotive parts, electronics and electrical appliances, machinery and other fields.