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Surface pretreatment method of PET extruded sheet

2019-07-10 11:40:47

In order to advance the surface function of the PET extruded sheet, to improve the adaptability of printing and the bonding force of the vacuum aluminized layer, corona treatment is generally used to advance the surface tension of the film. However, the corona method has problems such as timeliness, especially in a high temperature and high humidity environment, the tension of the film after the corona treatment is easily attenuated. However, the chemical coating law does not have such a problem, so it is favored by the printing industry and the aluminum plating industry. Some domestic companies have announced PET chemical coating series products: if they are coated with water-soluble polymers, the surface tension of the PET extruded sheet can be increased; if they are coated with acrylic emulsions, they can improve printing adaptability (water-soluble Ink); The choice of polyurethane aqueous solution coating can strengthen the bonding force between the aluminum coating and the PET base film, and the thickness of the aluminum coating can be added. In addition, the choice of coating method can also be used to produce high barrier films and antistatic films.

   PC film is the abbreviation of polycarbonate film, which is an amorphous, odorless, non-toxic, highly transparent colorless or slightly yellow thermoplastic engineering plastic.

PC film has physical and mechanical functions, especially excellent impact resistance, high tensile strength, bending strength, and shrinking strength; it has good heat resistance and low temperature resistance, and has stable mechanical functions in a wide temperature range. Standard stability, electrical function and flame retardancy, can be used for a long time at -60~120℃; no obvious melting point, in a molten state at 220-230℃; high rigidity, high resin melt viscosity; low water absorption and shrinkage Small, low creep, high standard precision, good standard stability, low film permeability; self-extinguishing material; stable to light, but not resistant to ultraviolet light, good weather resistance; oil and acid resistance.

   PC film has poor abrasion resistance, poor solvent resistance, is not resistant to strong alkalis, oxidizing acids, amines and ketones, and is soluble in chlorinated hydrocarbons and aromatic solvents.

   PC film is divided into: halogen-free flame-retardant PC, black flame-retardant PC, transparent flame-retardant PC, frosted PC, transparent PC, hardened PC, scratch-resistant PC, scratch-resistant PC, printing-grade PC, optical-grade PC

  The main uses of our PC film and sheet are as follows:

   1. Flame-retardant pc film is used for power system insulation, disk drive insulation, keyboard insulation, TV/display insulation, and computer motherboard insulation. It is widely used in electronic components, electrical enclosures, switch panels, junction boxes and charger enclosures, automotive instrumentation and panel printing with flame-retardant requirements.

  2, printing grade matte pc film, suitable for special printing, helmets, signs, nameplates, protective covers, etc.

  3, anti-scratch pc film Uses: window lenses for mobile phones, MP3, MP4, DVD, backlight and other electronic products

PET sheet


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