The usual packaging roll film. At present, the sales situation in the market is very optimistic. Next, let’s talk about the packaging roll film. Each manufacturer controls the heat-sealing strength as an important quality index. Based on the actual production experience in the workshop, a simple analysis is made on the factors affecting the heat-sealing strength of the packaging roll film for your reference: Temperature: The heat-sealing temperature directly affects the strength of the packaging roll film. Time: Under the condition that the heat-sealing temperature and heat-sealing pressure are constant, the longer the heat-sealing time is, the stronger the bonding between the heat-sealing layers will be. If the heat-sealing time is too long, wrinkles and unevenness will appear in the heat-sealing part of the packaging film, which will seriously affect the appearance quality of the product. Pressure: In order to ensure the strength of the packaging film, corresponding pressure is required. Therefore, moderate and uniform pressure is required in the heat sealing process. If the pressure is not enough or uneven, air bubbles will be generated in the heat sealing part, resulting in poor heat sealing.