Introduction of PVDC
BY：Industry news
CLICK：387
POST：2021-05-31
PVDC is an ideal packaging material with high barrier, strong toughness, low temperature heat seal, heat shrinkage and good chemical stability. It is unique in the packaging industry, especially its properties of moisture resistance, oxygen resistance, moisture resistance, acid alkali resistance, oil immersion resistance and multi chemical solvents. It has been widely used in food, medicine and military packaging for 50 years.
PVDC, known as polyvinylidene chloride, is a thermoplastic polymer with softening temperature of 160-200 ℃, and has a linear polymerization chain structure connected with the head and tail. The molecular structure is symmetrical and the crystallinity is high. For PVDC, because of its strong intermolecular agglutination, high crystallinity, hydrophobicity of chlorine atoms in PVDC molecules, hydrogen bonds will not be formed, and it is difficult for oxygen and water molecules to move in PVDC molecules, so it has excellent oxygen and moisture resistance, and its oxygen resistance is not affected by the ambient humidity. In other words, it has excellent ability to block water vapor, oxygen, smell and fragrance under any temperature or humidity condition, and is currently recognized as the best plastic packaging material with comprehensive performance in terms of barrier. The use of PVDC can delay the occurrence of oxidation deterioration of food, greatly prolong the shelf life of products, and avoid the fragrance loss of the contents and the invasion of the external bad smell; By using its moisture resistance, the product can be prevented from drying and taste deterioration due to water loss, the packaging prototype will not be damaged due to water absorption, and the natural loss (weight loss) of quantitative products can be prevented. The gas resistance does not change with the change of humidity, even in high humidity environment, it will not cause deterioration of products; The low permeability can prevent the loss of fragrance, and can not absorb residual and abnormal smell, which can guarantee the integrity of odor (this is particularly important when packaging low fat or high protein food). Excellent weather resistance, even if exposed to the outside for a long time, directly exposed to sunlight, there will be no fading and aging of packaging. Safety and environmental protection, in line with food hygiene requirements, through the FDA (U.S. Food and Drug Administration) certification, for food packaging safety escort. Main application fields: cheese, soup, snacks, cooking bags, medical packaging, dry food packaging, biscuits and cereal foods, pet food, stretching up and down film, soy sauce, meat products, liquid packaging, bean products packaging, electronic product packaging, chemical packaging and other fields. It can be cooked at 125 ℃ /30min.
PVDC, known as polyvinylidene chloride, is a thermoplastic polymer with softening temperature of 160-200 ℃, and has a linear polymerization chain structure connected with the head and tail. The molecular structure is symmetrical and the crystallinity is high. For PVDC, because of its strong intermolecular agglutination, high crystallinity, hydrophobicity of chlorine atoms in PVDC molecules, hydrogen bonds will not be formed, and it is difficult for oxygen and water molecules to move in PVDC molecules, so it has excellent oxygen and moisture resistance, and its oxygen resistance is not affected by the ambient humidity. In other words, it has excellent ability to block water vapor, oxygen, smell and fragrance under any temperature or humidity condition, and is currently recognized as the best plastic packaging material with comprehensive performance in terms of barrier. The use of PVDC can delay the occurrence of oxidation deterioration of food, greatly prolong the shelf life of products, and avoid the fragrance loss of the contents and the invasion of the external bad smell; By using its moisture resistance, the product can be prevented from drying and taste deterioration due to water loss, the packaging prototype will not be damaged due to water absorption, and the natural loss (weight loss) of quantitative products can be prevented. The gas resistance does not change with the change of humidity, even in high humidity environment, it will not cause deterioration of products; The low permeability can prevent the loss of fragrance, and can not absorb residual and abnormal smell, which can guarantee the integrity of odor (this is particularly important when packaging low fat or high protein food). Excellent weather resistance, even if exposed to the outside for a long time, directly exposed to sunlight, there will be no fading and aging of packaging. Safety and environmental protection, in line with food hygiene requirements, through the FDA (U.S. Food and Drug Administration) certification, for food packaging safety escort. Main application fields: cheese, soup, snacks, cooking bags, medical packaging, dry food packaging, biscuits and cereal foods, pet food, stretching up and down film, soy sauce, meat products, liquid packaging, bean products packaging, electronic product packaging, chemical packaging and other fields. It can be cooked at 125 ℃ /30min.