Due to BOPP heat-seal film Its manufacturing process differs from that of conventional heat‑shrink films, and its application in heat‑shrink packaging also has distinctive characteristics. Consequently, the film itself must meet stringent performance requirements. Below, we examine the performance specifications for BOPP heat‑sealable films.

　　1. Lower shrinkage temperature, which helps increase packaging speed and reduce packaging costs.

　　2. It features a wide operating temperature range. The enhanced mechanical properties of the heat‑sealable film enable it to be readily incorporated into the design of both new and existing shrink‑wrapping equipment, without requiring significant adjustments to packaging parameters.

　　3. Appropriate shrinkage rate and shrinkage force. Different package contents may require varying shrinkage performance to achieve optimal results, which can be adjusted through formulation and production conditions.

　　4. Excellent mechanical strength: high tear resistance, puncture resistance, and impact resistance, which help reduce package leakage and provide robust protection for the contents. BOPP heat-seal films enhance the visual appeal of the packaging, boosting product attractiveness and stimulating consumer purchasing intent.

　　5. Strong heat-seal strength and heat-bonding strength. For high-speed automatic packaging equipment, robust heat-bonding and heat-seal strengths are particularly critical, as they can effectively reduce the package leakage rate.

　　Depending on the packaging method, there are roughly three production and packaging formats for BOPP heat-seal films.

　　One type is an open-ended packaging format at both ends of the heat-shrink machine. In this method, the packaged product is encased in a cylindrical or flat film sleeve and then subjected to intense heat for shrinkage. Once the packaging is complete, the two ends of the package feature sealed shrink‑down edges.

　　The production process for this type of packaging is as follows: when the product is to be wrapped in tubular film, the opening of the film is first unfolded, and then the packaged product is pushed into the film using a slide. Once this step is complete, the film is cut. This packaging method is particularly well suited for enclosing cylindrical items with heat‑shrinkable film.

　　It is used for the production and packaging of items such as batteries, paper rolls, bottles, and cans. The advantage of this cylindrical heat-shrink wrapping process is that it involves fewer steps, resulting in an aesthetically pleasing finished product. However, its major drawback is its limited ability to meet the modern demand for product variety; it is typically suited only to the mass production of a single product.

　　Shrink machines come in two packaging formats, one of which is a four-seal, one-open configuration. In this method, the product is wrapped in a flat film or a cylindrical film and then sealed with an overlapping seam; this packaging style is well-suited for sealing products.

　　The latter is shrink-wrapping of pallets, which falls under the category of its packaging methods. Specifically, the process involves first forming a square-bottom pouch from a heat‑shrink film, then placing the pouch, opening side down, onto a stacked pallet of goods, and finally applying heat to achieve shrinkage. This packaging method enhances product stability, preventing loosening during transportation.