Characteristics and uses of heat-resistant packaging film (fluororesin film)

DATE:2019/10/28 9:00:32 / READ: / SOURCE:This station

Characteristics and uses of heat-resistant packaging film (fluororesin film)
The film for heat-resistant packaging refers to some packaging films with a heat resistance of 150 ° C or higher. In addition to nylon, PET film, some engineering plastic films have good temperature resistance and other packaging characteristics.
Fluorine resin film
Fluororesin film, except for PTFE, which can only be formed by cutting, other plastics such as polychlorotrifluoroethylene (PCTFE) film, polyvinyl fluoride film (PVF), polyvinylidene fluoride (PVDF) film, An ethylene-tetrafluoroethylene copolymer (ETFE) film, an ethylene-chlorotrifluoroethylene (ECTFE) film, or the like can be formed by an extrusion casting method or an extrusion inflation method.
The characteristics of fluoroplastic film are: transparent and smooth, the friction coefficient is very small; the temperature range is wide, the lowest is -200 ° C, and the highest is 260 ° C; except for FEP and ETFE, the gas barrier properties of other fluoroplastic films are better than The glass is good, and the FEP gas permeability is equivalent to LDPE. Among them, PCTFE has the best gas barrier property, which is 1/30 of the breathability of the PET biaxially stretched film and 1/20 of the glass; the fluoroplastic film is resistant to sunlight and is not transparent to ultraviolet light.
Fluoroplastic film can be used for corrosive packaging, oily food packaging, frozen pharmaceutical packaging, and semiconductor electronic device packaging. The S-type in the polyvinyl fluoride film can be sealed and welded at 190-204 °C by high-frequency method or heat welding method, while the A-type film of polyvinyl fluoride can be bonded to the adhesive, ink and paint on one side, and One side can't be bonded, but it can be heat sealed. The B-type film of polyvinyl fluoride can be bonded on both sides, and the S-type double-sided can not be bonded, but can be heat-sealed.
In addition, polychlorotrifluoroethylene film (90% or more of PCTFE) is used at temperatures ranging from -184 to 149 ° C, has extremely low H2O permeability, O2 permeability, excellent thermoformability, flame retardancy, and good chemical inertness. The material laminated with PVC, PE, PET, PA6 and aluminum foil can be used for the cleaning and packaging of important mechanical parts and the insulation encapsulation of aircraft. As a packaging material, it can be used for packaging materials of precious drugs and prolong the effective use period of drugs. The composite material with PE is also used for the packaging of water-sensitive drugs.

Author:admin


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