Plastic King-Polyetherketone PEEK

PEEK is formed by continuous extrusion: PEEK rod, PEEK plate, PEEK tube, PEEK film, PEEK sheet, PEEK filament, PEEK capillary; polyetheretherketone (PEEK) is an extension film with low crystallinity, and generally needs to be combined with carbon fiber, glass fiber, melamine fiber and other materials for use. Composite.Uncompounded polyetheretherketone (PEEK) films can be stretched and heat treated to improve strength and heat resistance.The stretched and heat-treated polyetheretherketone (PEEK) film has a melting point 80℃ higher than that of PET film.

Advantages and disadvantages of PEEK

Advantages of PEEK

Corrosion resistance, anti-aging; solubility resistance; high temperature, high frequency and high voltage performance conditions; both toughness and rigidity; precise size requirements conditions; radiation resistance, wear resistance, corrosion resistance conditions; resistance to hydrolysis, high temperature and high pressure can still maintain excellent characteristics; lightweight replacement of metal as optical fiber components; good wear resistance, antistatic electrical insulation properties; high mechanical strength requirements components; low soot and toxic gas emissions

Disadvantages of PEEK

Injection, molding and #profile extrusion process conditions are harsh

The main application areas of PEEK

PEEK is resistant to hydrolysis and easy to process, etc., and has been used in aerospace, automobile manufacturing, electrical and electronic, medical and food processing fields; it is widely used in machinery, petrochemical, nuclear power, rail transit and other fields, such as compressor valve plates, high-pressure steam ball valve seats, bearing cages, chemical pump gears, sliding bearings, seals, piston rings, sliding shoes and other machine parts, light product quality, long service life, but also reduce machine operating noise.In addition, because PEEK has a good electrical insulator, it can still maintain good electrical insulation properties under harsh working conditions such as high temperature, high voltage and high humidity.

PEEK features

As a semi-crystalline engineering plastic, PEEK is insoluble in almost all solvents except concentrated sulfuric acid, so it is commonly used to make compressor valve plates, piston rings, seals, and various chemical pump bodies and valve components.PEEK resin can also be autoclaved for up to 3000 cycles at 134℃. This characteristic makes it suitable for the production of surgical and dental equipment with high sterilization requirements and repeated use.

PEEK processing

● Extrusion technology and furnace temperature control:
 #Extrusion molding technology includes wire coating, pipe rod profile, film sheet and monofilament manufacturing.All extruder are basically single screw extruder, but the downstream equipment such as head, die, setting, cooling, traction, stretching, calendering, and winding are not the same.
The metal or ceramic heater on the barrel must cover all the surfaces of the metal barrel and can be heated to 400℃±2℃ to ensure uniform temperature distribution

● Molding temperature:
PEEK molding temperature is 320 degrees~390 degrees, baking temperature is 160~1855H~8H, mold temperature is 140~180, the molding temperature of this material is too high, and the damage to the #extruder’ s screw is more serious. When setting the screw speed, the speed should not be too fast, and the injection pressure is 100~130MPa. The injection speed is 40~80.

● Regulatory recommendations:
After the molding is over, the screw should be quickly cleaned with PE wax in time, and the PEEK material should not be allowed to stay in the screw.PVC-type screws extruded by PEEK but continuously compressed are not recommended, because the screw does not have a feeding area, which causes the plastic to compress as soon as it enters the barrel, resulting in excessive screw torque.The filtration of PEEK melt has a good effect on the uniformity of the physical properties of the extrusion; use 20/60/250/60/ The filter combination device composed of 250 mesh stainless steel wire braided mesh can obtain better results for filtering the continuous flow melt.