Polyvinylidene chloride (PVDC) inner printing film is a remarkable packaging material that has gained significant traction across various industries due to its outstanding properties. As a supplier of PVDC inner printing film, I am often asked about its gas permeability. In this blog post, I will delve into the concept of gas permeability, explain how it relates to PVDC inner printing film, and highlight why it matters for your packaging needs. Polyvinylidene Chloride Inner Printing Film
Understanding Gas Permeability
Gas permeability refers to the ability of a material to allow gases, such as oxygen, carbon dioxide, and nitrogen, to pass through it. It is typically measured in terms of the amount of gas that penetrates a unit area of the material over a specific time under a given set of conditions, including temperature, humidity, and pressure. The lower the gas permeability of a material, the better it is at preventing the exchange of gases between the inside and outside of the package.
This property is of utmost importance in packaging, as the presence of certain gases can have a detrimental effect on the quality and shelf life of the products. For example, oxygen can cause the oxidation of food products, leading to spoilage, discoloration, and loss of flavor. Carbon dioxide is often used as a preservative gas in modified atmosphere packaging, and it is crucial to maintain its concentration within the package to ensure the quality of the product.
Gas Permeability of PVDC Inner Printing Film
PVDC is well – known for its extremely low gas permeability. When it comes to PVDC inner printing film, this characteristic is even more valuable. The structure of PVDC consists of highly crystalline regions intermixed with amorphous regions. The crystalline regions act as barriers to gas molecules, preventing them from passing through the film.
The inner printing process doesn’t significantly affect the gas – barrier properties of the PVDC film. In fact, the inks used in the inner printing are carefully selected to ensure that they do not compromise the integrity of the film. The inner printing not only provides an aesthetic appeal to the packaging by displaying product information, branding, and other graphics but also protects the inks from abrasion and contact with the product.
Compared to other commonly used packaging films, such as polyethylene (PE) and polypropylene (PP), PVDC inner printing film offers superior gas – barrier performance. PE and PP have relatively high gas permeabilities, which means they are less effective in protecting products from the negative effects of gas exchange. For instance, the oxygen transmission rate (OTR) of PVDC can be as low as 0.1 – 1 cm³/m²·24h·atm, while the OTR of PE can range from 100 – 1000 cm³/m²·24h·atm, depending on the type and thickness of the film.
Factors Affecting the Gas Permeability of PVDC Inner Printing Film
Several factors can influence the gas permeability of PVDC inner printing film.
Film Thickness
Generally, as the thickness of the PVDC inner printing film increases, its gas permeability decreases. A thicker film provides more resistance to gas molecules, reducing the likelihood of them passing through. However, there is a trade – off, as increasing the film thickness also increases the cost and weight of the packaging.
Temperature
Temperature has a significant impact on gas permeability. As the temperature rises, the kinetic energy of gas molecules increases, making them more likely to penetrate the film. For PVDC inner printing film, the gas permeability can double or even triple with a relatively small increase in temperature. Therefore, it is crucial to consider the storage and transportation conditions of the packaged products when selecting the appropriate packaging film.
Humidity
Humidity can also affect the gas – barrier properties of PVDC inner printing film. High humidity levels can cause the film to absorb moisture, which can plasticize the PVDC and increase its gas permeability. However, PVDC has better moisture resistance compared to many other polymers, which helps to maintain its gas – barrier performance under normal humidity conditions.
Importance of Low Gas Permeability in Packaging
The low gas permeability of PVDC inner printing film offers several benefits in packaging applications.
Extended Shelf Life
By preventing the ingress of oxygen and other harmful gases, PVDC inner printing film helps to extend the shelf life of products. This is especially important for food products, pharmaceuticals, and electronics. For example, in the food industry, products packaged in PVDC inner printing film can stay fresh for a longer period, reducing waste and increasing consumer satisfaction.
Product Quality Maintenance
The gas – barrier properties of PVDC inner printing film ensure that the quality of the product is maintained throughout its shelf life. For food products, it can preserve the flavor, texture, and nutritional value. In the pharmaceutical industry, it can protect drugs from oxidation and degradation, ensuring their efficacy.
Brand Protection
High – quality packaging is essential for brand protection. PVDC inner printing film not only provides excellent gas – barrier properties but also allows for high – quality printing. This means that your brand can be prominently displayed on the packaging, and the product is protected from damage caused by gas exchange, enhancing the overall brand image.
Applications of PVDC Inner Printing Film
The low gas permeability of PVDC inner printing film makes it suitable for a wide range of applications.
Food Packaging
In the food industry, PVDC inner printing film is commonly used for packaging meats, cheeses, snacks, and bakery products. Its gas – barrier properties prevent the growth of aerobic bacteria and mold, and it can also maintain the freshness and flavor of the products.
Pharmaceutical Packaging
Pharmaceutical products are sensitive to environmental factors, including oxygen and moisture. PVDC inner printing film provides an effective barrier to protect drugs from degradation, ensuring their stability and effectiveness. It can be used for blister packs, strip packs, and other pharmaceutical packaging formats.
Industrial Products Packaging
PVDC inner printing film can also be used for packaging industrial products, such as electronics components and chemicals. Its gas – barrier properties protect these products from oxidation and moisture, preventing corrosion and degradation.
Why Choose Our PVDC Inner Printing Film
As a supplier of PVDC inner printing film, we are committed to providing high – quality products with excellent gas – barrier properties. Our manufacturing process is carefully controlled to ensure the uniformity and integrity of the film. We use the latest technology and equipment to produce PVDC inner printing film with consistent thickness and high – quality printing results.
We also offer a wide range of customization options. Whether you need a specific thickness, printing pattern, or color, we can work with you to meet your requirements. Our team of experts can provide technical support and advice to help you select the most suitable PVDC inner printing film for your application.
Conclusion
The gas permeability of PVDC inner printing film is a critical factor that makes it an ideal choice for a variety of packaging applications. Its low gas permeability helps to extend the shelf life of products, maintain their quality, and protect your brand. As a professional PVDC inner printing film supplier, we are dedicated to providing you with the best products and services.
Barrier Shrink Bag If you are interested in learning more about our PVDC inner printing film or have any questions regarding its gas permeability and other properties, please feel free to contact us. We look forward to discussing your packaging needs and working with you to find the perfect solution.
References
- "Handbook of Plastic Films", Second Edition, by Andrew A. Collyer.
- "Packaging Materials and Processes: A Supply Chain Perspective" by Charles Berger and Joseph P. Keany.
- Research papers on gas barrier properties of polymers published in journals such as "Journal of Applied Polymer Science" and "Polymer Degradation and Stability".
Sinosealed Packaging Solutions Limited
With a professional production team, we are one of the most experienced polyvinylidene chloride inner printing film manufacturers and suppliers in China. Please rest assured to buy high quality polyvinylidene chloride inner printing film for sale here from our factory. For price consultation, contact us.
Address: Luohe City, Henan Province, China
E-mail: contact@barrierpackage.com
WebSite: https://www.barrierpackage.com/
