We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

what is Biaxially Oriented Polypropylene Film?

By Mal Baxter
Updated May 17, 2024
Our promise to you
About Mechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At About Mechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Biaxially oriented polypropylene film, or BOPP film, is often seen in small or large rolls of clear plastic sheets used in packaging and wrapping. This popular, widely adopted stretched polypropylene performs duty across a range of industries and products. Its unique properties include shrinkage, transparency, and sealability, all of which permit numerous applications in industrial, commercial, and household use. Common products made from this material include Mylar® and shrink wrap.

This film is manufactured with many different dimensions and treatments for end products from stationery to snack food bags. It can also be metalized for additional uses and applications. On smaller scales, it is used as wrapping for flower sleeves, pressure sensitive tape, and even clear bags.

The clarity of this film is a result of orienting the molecular structure of polypropylene in two uniform directions, which also enhances molecular strength and self-adhesing while minimizing elongation properties. Several manufacturing processes result in flexible plastic sheets of various sizes, thicknesses, and finishes. With higher tensile strength, the film provides an attractive and stable medium in which to hold products for shipping as well as crisp, clean packaging for products. The film also provides an effective barrier against foreign particles; this trait, along with being waterproof, makes it a conventional packaging choice for food-grade products.

Another advantage of biaxially oriented polypropylene film is its high-seal strength, even with low seal pressure. Its symmetrical polymer structure affords a higher melting point for expedient machine processing. A low initiation temperature and wide window for sealing make it a versatile material for inconsistent handling with minimal damage. An additional characteristic of the film is its resistance to haze that can result from evaporation and humidity.

By providing a thermal resistant barrier, biaxially oriented polypropylene film is heat-sealable. This allows it to perform as lamination in printing and gift wrapping, as well as wrapping for large-scale products on shipping pallets. These thermal-resistant properties enable faster performance when loaded in high-speed form, fill, and sealing (FFS) machines.

In addition to this characteristic, BOPP film possesses lower tackiness and easier jaw release than other types of packaging. As polypropylene carries a measure of health concern regarding toxic byproducts, the minimal amorphous fraction of biaxially oriented polypropylene film means reduced xylene extractables. That is, it is typically a non-toxic, non-adhesive film; it produces few irritants for inhalation or exposure.

Stable surface properties result from low blooming and low amorphous molecular weight or other additives. Manufactured via methods of extrusion, injection, and stretch blow molding, the material surface is given treatments to allow for application of inks and paint. This versatile, ubiquitous film has become a commonplace wrapping and packing product, performing many roles.

About Mechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.