What are the materials and production process of polyester film

Update:08-06-2020
Summary:

Biaxially cable insulation material oriented polyester […]

Biaxially cable insulation material oriented polyester film utilizes bright material BOPET film with high strength, good rigidity, transparency, high gloss, etc.; odorless, tasteless, colorless, non-toxic, outstanding strength and toughness; its tensile strength is PC film 3 times the nylon film, the impact strength is 3-5 times the BOPP film, has excellent wear resistance, folding resistance, pinhole resistance and tear resistance, etc.; heat shrinkage is extremely small, at 120 ℃ It only shrinks by 1.25% after 15 minutes; it has good antistatic properties, is easy to vacuum aluminize, and can be coated with PVDC, thereby improving its heat sealability, barrier properties and printing adhesion; BOPET also has good heat resistance Resistance, excellent cooking resistance, low temperature freezing resistance, good oil resistance and chemical resistance. With the exception of nitrobenzene, chloroform, and benzyl alcohol, most of the BOPET film cannot dissolve it. However, BOPET will be corroded by strong alkali, so please pay attention when using it. BOPET film has low water absorption, good water resistance, and is suitable for packaging food with high water content. Uniaxially stretched polyester film referred to as CPET for short is a film made of semi-dulling material added titanium dioxide to raw material polyester chips, dried, melted, extruded, cast and longitudinally stretched. The grade and price are the lowest, mainly used for pharmaceutical tablet packaging. Due to less usage, manufacturers have less large-scale production, accounting for about 5% of the polyester film field, Chinese enterprises also import less, the standard thickness is 150μm.

 

Aluminum Foil Mylar

According to the use classification of polyester film, the characteristics of polyester film determine its different uses. Polyester films for different purposes have different requirements for raw materials and additives, as well as processing techniques, and their thickness and technical indicators are also different; in addition, only BOPET has multiple uses, so the films classified according to use are BOPET. Can be divided into the following types: electrical insulating film. Because of its good electrical, mechanical, thermal and chemical inertness, good insulation performance and high breakdown voltage, it is dedicated to electronic and electrical insulation materials. Common standard thicknesses are: 25μm, 36μm, 40μm, 48μm, 50μm, 70μm, 75μm, 80μm, 100μm and 125μm micrometer. Including wire and cable insulation film thickness 25-75μm and touch switch insulation film (50-75μm). Capacitive film. It has the characteristics of high tensile strength, high dielectric constant, low loss factor, good thickness uniformity, good electrical performance, and large resistance. It has been widely used in capacitor dielectrics and insulating interlayers. Commonly used standard thicknesses are 3.5μm, 3.8μm, 4μm, 4.3μm, 4.8μm, 5μm, 6μm, 8μm, 9μm, 9.8μm, 10μm, 12μm. Protect card film. It has good transparency, high stiffness, good thermal stability, excellent surface winding performance, uniform vertical and horizontal tensile properties, and has excellent properties such as waterproof, oil and chemical resistance. It is specially used for the protective packaging of pictures, certificates, documents and office supplies, so that it can be flat and beautiful after hot stamping as a protective film, and can keep the originals clear and not deformed.

 

Commonly used standard thicknesses are 10.75μm, 12μm, 15μm, 25μm, 28μm, 30μm, 36μm, 45μm, 55μm, 65μm, 70μm, of which 15μm or more are mainly used as laser anti-counterfeiting base film or high-grade protective card film. Universal membrane. With excellent strength and dimensional stability, cold resistance and chemical stability, it is widely used in various substrates such as composite packaging, photosensitive film, metal evaporation, audio and video recording. There are the following specific types: semi-reinforced film. The main feature is that the longitudinal tensile strength is large, and it is not easy to break under a large tensile force. It is mainly used for packaging seals of boxed items. Commonly used standard thicknesses are 20μm, 28μm, 30μm, 36μm, 50μm. Bronzing film. The biggest features are good tensile strength and transparency, stable thermal performance, and low binding force with certain resins. It is mainly suitable for the use of small dimensional changes during high temperature processing or as a transfer carrier. Conventional standard thicknesses are 9μm, 12μm, 15μm, 19μm, 25μm, 36μm. Printing composite packaging film. The main features are good transparency, good penetration resistance, excellent chemical resistance, temperature resistance and moisture resistance. Suitable for the packaging of frozen food and food, medicine, industrial products and cosmetics. Commonly used standard thicknesses are 12μm, 15μm, 23μm, 36μm. Aluminum coating.

 

The main features are high strength, good temperature and chemical resistance, good processing and anti-aging properties, and proper corona treatment to make the adhesion of the aluminum layer and film more firm. After aluminum plating, it can be widely used in the packaging of tea, milk powder, candy, biscuits, etc., and can also be used as decorative film such as string flower crafts, Christmas tree; it is also suitable for printing compound or cardboard compound Conventional standard thicknesses are 12μm, 16μm, 25μm, 36μm. Magnetic recording film. It has the characteristics of good dimensional stability, uniform thickness and high tensile strength. Suitable for base film and special packaging film of magnetic recording materials. Including audio and video tape base common standard thickness is 9-12μm and black film common standard thickness is 35-36μm nano-PET film. High transparency and glossiness: the particle size of nanoparticles is between 1-100nm, less than the wavelength of visible light, Less influence on film transparency. High barrier properties and heat resistance: Using nanomaterials with special properties and unique processing technology, the nanomaterials are uniformly dispersed in the PET matrix in the nanometer size, and are oriented by stretching during the film production process , So that the PET film exhibits excellent barrier performance, O, CO2, and H2O transmittance decreases exponentially, and the heat resistance is also greatly improved, which can expand the application of PET, greatly extend the shelf life of the packaged goods, and also Used for hot filling or disinfection.