Influence of Sealing
The heat sealing process is a key factor in ensuring the sealing of Plastic Products Packaging Bag. The plastic material at the sealing part of the packaging bag is melted and combined together by heating to form a tight sealing structure. If the heat sealing temperature, pressure and time parameters are not properly controlled, the sealing may be incomplete, and tiny pores or gaps may appear, thus destroying the sealing of the packaging bag. This will not only make the items in the bag vulnerable to the invasion of external air, moisture and pollutants, affecting the quality and shelf life of the product, but may also cause leakage of items during transportation or storage, causing losses. For example, for food packaging bags, good sealing is an important guarantee for maintaining the freshness of food and preventing deterioration.
Influence of Strength
The heat sealing process is directly related to the strength of the Plastic Products Packaging Bag seal. Appropriate heat sealing parameters can fully fuse the plastic molecules at the seal to form a strong bond, and improve the tear strength and tensile strength of the seal. On the contrary, if the heat sealing process is unreasonable, the seal may be virtual sealed, weakly sealed, etc., resulting in insufficient sealing strength. When the packaging bag is subjected to external forces, such as handling, squeezing, etc., the seal is easy to break, making the packaging bag lose its protective effect. Especially for some heavy or sharp-edged packaging, the sealing strength is particularly important, which directly affects the reliability and safety of the packaging bag during use.
Influence of appearance quality
The heat sealing process also has a significant impact on the appearance quality of the Plastic Products Packaging Bag. During the heat sealing process, too high temperature or too long time may cause excessive melting of the plastic material at the seal, resulting in problems such as overflow and deformation, affecting the overall appearance of the packaging bag. If the temperature is too low or the pressure is insufficient, the surface of the seal may be uneven, with wrinkles or bubbles. These appearance defects will not only reduce the visual effect of the packaging bag and affect the sales image of the product, but may also imply that there is a problem with the sealing quality, causing consumers to worry about the product quality.
Influence of barrier properties
The barrier properties of the Plastic Products Packaging Bag are crucial to protecting the quality of the contents, and the heat sealing process will also have a certain impact on it. Good heat sealing can ensure that the barrier properties of the seal are consistent with other parts of the packaging bag, effectively blocking the penetration of substances such as oxygen, water vapor, and odor. However, if the heat sealing quality is poor, the seal may become a weak link in the barrier performance, destroying the barrier effect of the entire packaging bag and accelerating the deterioration or damage of the contents. For example, for some oxygen-sensitive products such as medicines and cosmetics, the heat sealing process must be strictly controlled to ensure that the packaging bag has good oxygen barrier properties and extend the shelf life of the product.
