Properties and uses of polycarbonate films
DATE：2019/10/29 8:58:59 / READ： / SOURCE：This station
Properties and uses of polycarbonate films
PC uses the inflation method and extrusion casting method to produce a film for packaging. The film has the inherent characteristics of resin: toughness, wide temperature range, transparency, easy processing and easy coating. PC film is suitable for medicine. Products and food packaging, cosmetics, carton wrapping. PC is the strongest and most rigid plastic in thermoplastics. It has 90% transparency and is resistant to various chemicals, including many acids and various hydrocarbons. However, some solvents will erode it and have good tensile strength and dimensional stability. It has low hygroscopicity and less shrinkage under temperature changes. Because of its high tensile strength, toughness and modulus, it is not necessary to use a relatively expensive biaxial stretching method to produce oriented films. It is only necessary to produce a general inflation film on a standard film line or Cast film can meet the requirements of packaging performance. It can be bonded with a standard water-based or alcohol-based adhesive and has good bond strength. It can also be used as a co-extruded base film or a dry composite film. The breaking strength of PC film can reach above 59MPa, no degradation occurs below 320°C, PC softens at 132°C, and can be embossed and heat-sealed at 176.6～221.1°C (350°F～430°F). Ultrasonic welding and can be thermoformed at the above temperatures. The thermoforming of the crystalline PC film is difficult, and for this reason, the deep drawing of the stretching ratio of 7 to 10 can be achieved using an amorphous PC film. Crystalline PC films cannot be heat sealed by themselves without loss of performance. They also do not contain plasticizers or other additives that can vaporize or migrate when they are heat sealed.
PC films can be printed with a variety of printing inks through screens, flexo plates, rotogravure, offset and hot stamping. Since the PC has a high surface energy, no surface treatment is required before printing. Also, the adhesion is good. If a vacuum metallization film is applied to a PC film, the gloss of the coating is beautiful because of its good transparency.
Typical uses for PC films are as follows:
(1) Pharmaceutical packaging
PC film can meet the requirements of medical packaging: it does not penetrate bacteria, can meet the requirements of standard sterilization methods, such as: autoclave sterilization, gamma-ray bacteria, ethylene oxide bacteria, long service life. It can be made into pockets and films to package medical instruments that need to be sterilized.
(2) Food packaging
Meat and meat products are packaged using FDA approved PC film. Because the film has good thermal stability, it can be hot-filled, has good hot filling intensity, can be used for retort sterilization, and can also be used for microwave food sterilization. The retort can be used at a temperature of 101.1~132.2 °C (-150-270 °F). )in the case of. The PC film can be heat sealed at a temperature of 204.4 ° C - 237.7 ° C (400 ~ 430 ° F) and the heat seal strength can reach 27.58 MPa (4000 Psi). PC provides a high strength pinhole resistant layer for fast food composite film packaging. The composite film bag can be used in a bag in a box package. The foil-free composite structure can be soldered using ultrasonic or radio frequency (RF). PC single-layer films are also suitable for cheese packaging, which does not require oxygen barrier and can be used for fruit packaging.
PC uses the inflation method and extrusion casting method to produce a film for packaging. The film has the inherent characteristics of resin: toughness, wide temperature range, transparency, easy processing and easy coating. PC film is suitable for medicine. Products and food packaging, cosmetics, carton wrapping. PC is the strongest and most rigid plastic in thermoplastics. It has 90% transparency and is resistant to various chemicals, including many acids and various hydrocarbons. However, some solvents will erode it and have good tensile strength and dimensional stability. It has low hygroscopicity and less shrinkage under temperature changes. Because of its high tensile strength, toughness and modulus, it is not necessary to use a relatively expensive biaxial stretching method to produce oriented films. It is only necessary to produce a general inflation film on a standard film line or Cast film can meet the requirements of packaging performance. It can be bonded with a standard water-based or alcohol-based adhesive and has good bond strength. It can also be used as a co-extruded base film or a dry composite film. The breaking strength of PC film can reach above 59MPa, no degradation occurs below 320°C, PC softens at 132°C, and can be embossed and heat-sealed at 176.6～221.1°C (350°F～430°F). Ultrasonic welding and can be thermoformed at the above temperatures. The thermoforming of the crystalline PC film is difficult, and for this reason, the deep drawing of the stretching ratio of 7 to 10 can be achieved using an amorphous PC film. Crystalline PC films cannot be heat sealed by themselves without loss of performance. They also do not contain plasticizers or other additives that can vaporize or migrate when they are heat sealed.
PC films can be printed with a variety of printing inks through screens, flexo plates, rotogravure, offset and hot stamping. Since the PC has a high surface energy, no surface treatment is required before printing. Also, the adhesion is good. If a vacuum metallization film is applied to a PC film, the gloss of the coating is beautiful because of its good transparency.
Typical uses for PC films are as follows:
(1) Pharmaceutical packaging
PC film can meet the requirements of medical packaging: it does not penetrate bacteria, can meet the requirements of standard sterilization methods, such as: autoclave sterilization, gamma-ray bacteria, ethylene oxide bacteria, long service life. It can be made into pockets and films to package medical instruments that need to be sterilized.
(2) Food packaging
Meat and meat products are packaged using FDA approved PC film. Because the film has good thermal stability, it can be hot-filled, has good hot filling intensity, can be used for retort sterilization, and can also be used for microwave food sterilization. The retort can be used at a temperature of 101.1~132.2 °C (-150-270 °F). )in the case of. The PC film can be heat sealed at a temperature of 204.4 ° C - 237.7 ° C (400 ~ 430 ° F) and the heat seal strength can reach 27.58 MPa (4000 Psi). PC provides a high strength pinhole resistant layer for fast food composite film packaging. The composite film bag can be used in a bag in a box package. The foil-free composite structure can be soldered using ultrasonic or radio frequency (RF). PC single-layer films are also suitable for cheese packaging, which does not require oxygen barrier and can be used for fruit packaging.
Author：admin