Biaxially Oriented polypropylene (BOPP) is a type of polypropylene film stretched in the machine direction (MD) and the transverse direction (TD). This biaxial orientation process enhances the film’s properties, making it suitable for a wide range of applications and one of the most popular and highly demanded films worldwide.
What are the key physical properties of Trico’s BOPP that contribute to its versatility, and how are these properties achieved?
High Clarity
High clarity in Trico’s BOPP films involves careful formulation and the use of specific additives and processing techniques. These factors work to minimize haze, improve gloss, and ensure uniform thickness. Some of the most common additives include:
Clarifying Agents: The clarity of BOPP film can be enhanced by reducing the size of polymer’s crystalline regions.
Slip Agents: Reducing friction between the layers of the film during processing and packaging helps maintain the film’s clarity.
Antistatic measures: Minimizing the build-up of static electricity on film’s surface reduces the attraction of dust and particles that can lead to a loss of clarity.
Processing Stabilizers: Protecting the polymer from degradation during extrusion and stretching processes is critical to maintaining the clarity of the film.
Check out Trico’s line of TREAX TX-G and TREAX TX-HC films for high-clarity BOPP film options.
Heat Sealability
Trico’s Heat-sealable BOPP films are versatile materials used extensively in flexible packaging due to their ability to form strong, reliable seals. The co-extrusion of a heat-sealable layer ensures that the films meet the needs of modern packaging applications. The performance of these films can be optimized for individual customers’ needs for seal strength, seal initiation temperature, seal integrity and printability.
Seal Strength: A critical performance factor to ensure the packaging remains sealed under mechanical stress, pressure, or during transportation.
Seal Initiation Temperature (SIT): The temperature at which the heat-sealable layer begins to form a seal. A lower SIT means the film can seal more efficiently at lower temperatures, which is particularly useful in high-speed packaging lines.
Seal Integrity: Reliable strong seals are essential for products that require protection from external elements like moisture, air, or contaminants.
Printability: The surface of Trico’s BOPP films can be optimized for ink adhesion through a combination of surface treatment, polymer formulation, and additives.
Check out Trico’s line of TREAX TX-HC and TREAX TX-HM films for high-clarity heat-sealable BOPP film options.
Surface Printability
Surface printability of Trico’s BOPP films is optimized through the use of surface treatments and additives that increase the film’s surface energy, making it more receptive to inks and coatings. Trico’s BOPP films are manufactured to achieve high-quality print adhesion for individual customers based on their ink selection.
Corona Treatment: A high-frequency electrical discharge is applied to the surface of the BOPP film, introducing polar groups that increase the surface energy from its natural state to improve adhesion.
Flame Treatment: The film surface is exposed to a controlled flame, which oxidizes the film, increasing its surface energy and improving ink adhesion. Flame treatment is especially useful for thicker films or films with unique formulations.
Antistatic and Anti-block Additives: Trico’s BOPP films may incorporate additives like antistatic or anti-blocking agents, preventing dust attraction and reducing surface friction without negatively impacting printability. This ensures a clean printing surface and minimizes defects during the printing process.
Check out Trico’s line of TX-YM films for graphic or print applications.
What are some applications for which Trico’s BOPP film is particularly well-suited? Why?
Food Packaging
Applications: Snack food packaging, confectionery wraps, fresh produce packaging, frozen food packaging, and bakery goods.
Why use BOPP for food packaging?
Moisture Barrier: BOPP films provide excellent moisture barrier properties, which help preserve the freshness of food products.
Clarity and Gloss: The high clarity and gloss of BOPP films make packaged food products visually appealing, enhancing shelf appeal.
Sealability: BOPP films can be heat-sealed, providing airtight packaging that extends the shelf life of food products.
Printable Surface: BOPP films have excellent printability, allowing for high-quality graphics and branding on the packaging.
Labeling
Applications: Pressure-sensitive labels, wrap-around labels, tamper-evident labels, UV-resistant labels.
Why use BOPP for labels?
Tensile Strength: The biaxial orientation process gives BOPP films high tensile strength in both the machine and transverse direction, making them durable and resistant to tearing.
Resistance to Chemicals: BOPP films are resistant to chemicals, oils, and solvents, which is important in labeling applications where the film may encounter various substances.
Clarity and Gloss: Trico’s BOPP films’ clarity and gloss enhance the visual appeal of labels, making them more attractive to consumers.
Cosmetics and Personal Care Packaging
Applications: Overwraps for boxes, pouches, sachets, and shrink sleeves for bottles.
Why use BOPP in cosmetics and personal care packaging?
Clarity and Gloss: The high clarity and glossy finish of BOPP films enhance the visual appeal of cosmetic packaging, making products look more attractive.
Barrier Properties: BOPP films protect the contents from moisture and external contaminants, which is important for preserving the integrity of personal care products.
Printable Surface: The ability to print high-quality images and text on BOPP films is crucial for branding and product information.
Release Films and Liners
Applications: Overwraps for boxes, pouches, sachets, and bottle shrink sleeves.
Why use BOPP for release and liner film applications?
Dimensional Stability: Maintaining consistent dimensions in release applications is crucial. Trico’s BOPP offers excellent dimensional stability because of its biaxial orientation process. This ensures that the material maintains its shape and thickness, even under temperature fluctuations, without significant shrinkage or expansion.
Smooth Surface for Consistent Release: A smooth surface is necessary for creating a uniform silicone coating, commonly applied to release liners to control the release force of adhesives. Trico’s BOPP provides an exceptionally smooth and uniform surface that enhances the silicone’s distribution and ensures a consistent, controlled release.
Sustainability and Recyclability: BOPP is more environmentally friendly than other materials like PET or silicone-coated paper because it is fully recyclable in existing polypropylene recycling streams. With the increasing emphasis on sustainability, BOPP’s recyclability is a significant advantage.
Excellent Die Cutting and Handling Properties: Release liners must withstand the rigors of die-cutting without tearing or stretching, especially in high-speed applications such as in label manufacturing or adhesive tape production. BOPP’s mechanical strength ensures it can handle these processes without damage.
Tapes and Industrial Applications
Applications: Tapes and industrial applications that require strength, durability, and versatility.
Why use BOPP for tapes and industrial applications?
High Tensile Strength: Trico’s BOPP tapes can handle mechanical stress, making them ideal for sealing heavy cartons, bundling goods, or use in demanding environments where the tape needs to withstand stress during shipping, handling, or storage.
Low Elongation and High Stiffness: Trico’s BOPP films have low elongation, meaning they don’t stretch much under stress. This ensures a firm, consistent hold in packaging or strapping applications, improving load stability and reducing the risk of product damage during transport or storage.
Heat and UV Resistant: Trico’s BOPP films exhibit good heat and UV resistance, meaning they maintain their properties when exposed to elevated temperatures or sunlight. This makes them ideal for outdoor applications, such as in agriculture, construction, or shipping where tapes or strapping are exposed to the elements.
Customizable Surface for Adhesion or Release: Trico’s BOPP films can be treated with various surface coatings to modify their adhesion properties. For example, corona treatment improves adhesion for pressure-sensitive adhesives, while silicone coatings can be applied for release liners or protective films.
Check out Trico’s line of TREAX TX-R and TREAX TX-T films for tape and industrial applications.
