What is the heat sealing performance of BOPP synthetic label paper?

The heat sealing performance of BOPP (Biaxially Oriented Polypropylene) synthetic label paper mainly depends on its specific production process and coating formula. Generally speaking, BOPP synthetic label paper has good heat sealing performance, but the specific performance may vary depending on the product. The following is a detailed analysis of the heat sealing performance of BOPP synthetic label paper:

1、 Overview of heat sealing performance

Heat sealing performance refers to the ability of materials to bond to each other or to other materials under heating conditions. For BOPP synthetic label paper, its heat sealing performance is usually achieved by adding heat sealing masterbatch to the film or performing special treatment during the production process.

2、 Factors affecting heat sealing performance

Addition of heat sealing masterbatch: Heat sealing masterbatch is an additive that can melt and bond other materials under heating conditions. Adding an appropriate amount of heat sealing masterbatch to BOPP synthetic label paper can significantly improve its heat sealing performance.

Production process: The stretching, temperature control, cooling and other steps during the production process will have an impact on the heat sealing performance of BOPP synthetic label paper. For example, excessive stretching may lead to a decrease in the heat sealing performance of the film, while improper temperature control may affect the melting and bonding effect of the heat sealing layer.

Coating formula: The chemicals in the coating formula can also affect the heat sealing performance of BOPP synthetic label paper. For example, additives in certain coating formulations can increase the heat sealing temperature and strength of the film.

3、 Specific manifestations of heat sealing performance

Heat sealing temperature: The heat sealing temperature of BOPP synthetic label paper is usually low, generally between 115 ℃ and 125 ℃. This enables BOPP synthetic label paper to reach the bonding state faster during the heat sealing process, thereby improving production efficiency.

Heat sealing strength: Heat sealing strength refers to the adhesive strength between the films after heat sealing. The heat sealing strength of BOPP synthetic label paper is usually high, which can meet the needs of most application scenarios. However, it should be noted that the heat sealing strength is also affected by factors such as temperature, pressure, and time.

Uniformity of heat sealing layer: The heat sealing layer of BOPP synthetic label paper is usually relatively uniform, which can ensure that the film after heat sealing remains consistent in appearance. This helps to improve the overall quality and aesthetics of the product.

4、 Application and Precautions

The heat sealing performance of BOPP synthetic label paper makes it widely used in the packaging fields of food, medicine, cosmetics and other industries. However, during use, the following points should be noted:

Choosing the appropriate heat sealing temperature and pressure: Depending on the specific application scenario and requirements, selecting the appropriate heat sealing temperature and pressure is the key to ensuring the heat sealing effect.

Avoid excessive stretching and high temperature exposure: Excessive stretching and high temperature exposure may lead to a decrease in the heat sealing performance of BOPP synthetic label paper, so these adverse factors need to be avoided during use.

Storage conditions: BOPP synthetic label paper should be stored in a dry, cool, and well ventilated environment to avoid moisture and high temperature effects.

In summary, BOPP synthetic label paper has good heat sealing performance and can meet the needs of most application scenarios. However, it is important to choose appropriate heat sealing conditions and avoid the influence of adverse factors during use.