PVC Polyvinyl Chloride Thin Film: (PVC)
Produced in 2 types hard and flexible. PVC type also has good resistance to moisture and gas, good grease resistance. PVC thin film is also widely used in thermoforming packaging for butter, vegetable oil... Thanks to its transparency, PVC is used in the form of mineral water bottles, used in cosmetics, cooking oils and fruit juices. A few types PVC film resistant to stable gas pressure in the bottle should be used to hold beer and other carbonated drinks.
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PVC thin film
Flexible PVC in the form of thin films for packaging fresh meat, fish, fruits, vegetables and other fresh products. Flexible PVC film is used to wrap pallets to keep all the goods on that pallet by stretching the film. There are also several types of PVC film used for packaging to prevent counterfeiting.
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PVC has a rather low thermal stability, so a stabilizer must be added in order to extrude PVC. A few countries do not accept tin-containing stabilizing agents, and in most countries there are strict laws regarding the maximum amount of excess vinyl monomer in the final product.
Thin Film PVDC Polyvinylidende Chloride (PVDC)
Commonly copolymerized with vinyl chloride and known as SARAN (trade name). Compared with all other plastic films, PVDC thin film has the lowest permeability to water vapor, O2, CO2.
It has resistance to fats and good chemicals. PVDC Màng membrane co is manufactured under the name CRYOVAC (trade name) PVDC film manufacturing process consists of extruding a tubular product into a water bath, then blowing the product with air to a very large diameter, and then orienting the film to 2 way. PVDC film is pressed flat, cut along the sides and wound into rolls.
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PVDC thin film
PVDC is widely used as a dispersion (disperse in water) to coat paper and paperboard. Multilayer membrane structure is required for good results.
PVDC is used for products with very tight requirements such as cheese and poultry packaging, often vacuum packaging in PVDC shrink film. It can be heat welded by high frequency welding machine or impulse welding machine. Vietnam plastic packaging company
PVDC is often used for high barrier requirements because it has the best barrier compared to other membranes. Some examples are PVDC coated cellophane for biscuits and moisture sensitive products. PVDC is widely used in complex laminated meat packing, PE/PVDC/PE double extrusion film is a very important extrusion film.
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