BOPP heat-seal film Known as the “queen of packaging” in the plastic film industry, it plays a pivotal role in the flexible plastic packaging sector. Since the late 1970s, the BOPP industry has seen an ever-expanding array of product varieties, adding vibrant hues to our diverse and colorful lives.

　　BOPP products can be classified according to their applications into glossy films, matte films, pearl‑finish films, cover‑coat films, aluminized films, adhesive‑tape films, bag‑forming films, heat‑seal films, laser‑etched films, anti‑fog films, and more. The variety of these films is also closely tied to our ongoing innovation efforts, aimed at enhancing living standards; in recent years, the shift toward environmentally friendly coatings has brought such materials increasingly into focus. Below, we provide a brief overview of the common applications of BOPP heat‑seal films:

　　Glossy film: In general, standard glossy film is primarily used for printing and is commonly employed in packaging applications. It is further categorized into thick film and thin film. Typically, thick film refers to a thickness of 25 μm or greater, while thin film denotes a thickness of 19 μm or less.

　　Matte film, also known as dull‑finish film, achieves its effect primarily through the absorption and scattering of light. It generally enhances the visual appeal of printed materials, though it comes at a higher price and is produced by relatively few domestic manufacturers, which is why it is often used for boxed food packaging. Matte films typically lack a heat‑seal layer, so they are frequently laminated with other films, such as CPP or BOPET.

　　Covering film: As far as we know, covering film is typically applied beneath the base film and usually undergoes double-sided corona treatment. Consequently, during use it overlaps with standard optical films, resulting in subtle differences. It is generally not used for producing ordinary packaging.

　　Pearlized film: Typically a three-layer co-extruded stretch film with a heat-seal layer on the surface—commonly used for chopstick bags. Because pearlized film often features its own heat-seal layer, it includes a dedicated heat-sealing section. Unlike BOPP heat-seal films, pearlized film generally maintains a density below 0.68, which helps reduce costs. Standard pearlized films exhibit a white, opaque pearlescent finish and offer moderate light‑blocking properties, providing protection for products that require shade. Of course, in food and consumer goods applications, pearlized film is frequently combined with other films—for example, in ice cream and chocolate packaging or beverage bottle labels—where the white pearlescent effect is enhanced by carefully designed printed patterns.

　　Aluminum‑coated film: While aluminum‑coated films are well known, the most commonly used substrates are BOPET and CPP. In China, aluminum‑coated BOPP heat‑seal films remain relatively rare, and in recent years, the price advantage of BOPP heat‑seal films has further impacted the market for aluminum‑coated BOPP heat‑seal films.

　　Laser film: It features a pliable functional layer and is a transparent BOPP heat-sealable film that can be formed without the need for an additional pre-coated molding layer. It is used in anti-counterfeiting packaging when applied to aluminized or vapor‑deposited substrates, or combined with cardboard or uncoated composite materials for packaging boxes in industries such as pharmaceuticals and food. Production within China remains relatively limited; it is typically employed for product authentication and decorative packaging, and its manufacturing process entails certain technical requirements.