What are the advantages of PVDC stretch film compared to PVC film?
Release Time:
2022-01-10
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Summary
PVDC Stretch Film It is an ideal packaging material with high barrier properties, strong toughness, good low-temperature heat sealability, heat shrinkability, and chemical stability. PVDC Stretch Film It is uncommon in the packaging industry, especially for its moisture resistance, oxygen resistance, moisture resistance, acid and alkali resistance, oil immersion resistance, and resistance to various chemical solvents. In the past 50 years, PVDC has been widely used in the packaging of food, pharmaceuticals, and military products. PVDC It is a copolymer mainly composed of vinylidene chloride. Because pure PVDC is difficult to process and apply, the homopolymer cannot be industrialized. The so-called PVDC industry also refers to the copolymer polymer industry based on VDC as the main component.
PVDC , scientifically named " Polyvinylidene Chloride ” , is a thermoplastic polymer with a softening temperature of 160-200 and has a linear polymer chain structure connected end to end. It has a high degree of crystallinity 、 and a symmetrical molecular structure. Due to its strong intermolecular cohesion and high crystallinity, PVDC the chlorine atoms in the molecule are hydrophobic and do not form hydrogen bonds. Oxygen molecules and water molecules are PVDC difficult to move within the molecule, which gives it excellent moisture resistance and oxygen resistance, and its oxygen resistance is not affected by environmental and humidity. That is to say, at any temperature or humidity, it has excellent barrier properties against water vapor, oxygen, odors, and flavors, and is recognized as a plastic packaging material with comprehensive barrier performance all very good among the plastic packaging materials. PVDC Using the gas barrier properties of can greatly delay the oxidation and deterioration of food, and ( extend the shelf life of products, while preventing the loss of internal flavors and blocking the intrusion of external unpleasant odors; thanks to its moisture resistance, it can prevent products from drying out due to water loss and poor taste, and will not damage the packaging prototype due to water absorption, thus preventing the natural loss of quantified products ) weight loss. ( The gas barrier performance does not change with humidity, and even in high humidity environments, it will not cause product deterioration; its low permeability can prevent flavor loss and ensure flavor integrity without absorbing residual or abnormal odors, ) especially when packaging low-fat or high-protein foods. It has excellent weather resistance; even when exposed outdoors for a long time and directly exposed to sunlight, the packaging will not fade or age. It is safe and environmentally friendly, meets food hygiene requirements, and is certified by FDA to ensure food packaging safety. Main application areas include: cheese, soup, snacks, steam bags, medical packaging, dry food packaging, biscuits and grains, pet food, stretch top and bottom films, sauces, meat products, liquid packaging, soy product packaging, electronic product packaging, chemical packaging, and more. It can withstand cooking for 125/30
minutes. Some vendors use cheap PVC Some vendors use cheap cling film to wrap fruits, cooked food, meat, etc. This cling film cannot contact high oil content, and long-term use may cause cancer! Due to its low price, better adhesion, and higher transparency, polyvinyl chloride is used by many unscrupulous merchants. However, this
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