Printing of dairy packaging materials - plastic cups and cover films

Plastic cup and cover film

Plastic cup packaging is now a major packaging form of yogurt packaging, and plastic cup and cover film are inseparable, so in the plastic cup and cover film matching issues, we need special attention:

The sealing of the plastic cup and the cover film must take into consideration the compatibility of the material. The material of the plastic cup is different, and the material of the cover film used to seal it is also different. At the same time, the sealing method, the sealing temperature, and the sealing pressure of the filling and sealing equipment all affect the sealing effect of the plastic cup.

The key to the match between the plastic cup and the film is to pay attention to the temperature and time when the film is sealed. If the temperature is too high or the time is too long, it may cause the cover film not to tear or tear.

However, when the consumer is using it, the problem of delamination when the cover film is torn is often present. The specific reasons and solutions for this problem are:

Plastic cup packaging is now a major packaging form of yogurt packaging, and plastic cup and cover film are inseparable, so in the plastic cup and cover film matching issues, we need special attention:

The sealing of the plastic cup and the cover film must take into consideration the compatibility of the material. The material of the plastic cup is different, and the material of the cover film used to seal it is also different. At the same time, the sealing method, the sealing temperature, and the sealing pressure of the filling and sealing equipment all affect the sealing effect of the plastic cup.

The key to the match between the plastic cup and the film is to pay attention to the temperature and time when the film is sealed. If the temperature is too high or the time is too long, it may cause the cover film not to tear or tear.

However, when the consumer is using it, the problem of delamination when the cover film is torn is often present. The specific reasons and solutions for this problem are:

The composite film itself does not meet the requirements;

The selected cover film is not matched with the production process, and the secondary cover film is used as a high-temperature resistant cover film for secondary sterilization to cause delamination.

There are two types of cover film: easy-to-tear and firm-type. If you use a strong cover material and use a strong force to tear, it will cause layering of the fixed PET and CPP;

The cover film is compounded with polyurethane glue. If the pH of the filling content is too high, or other corrosive substances will penetrate the CPP to corrode the PET and cause delamination.

In addition, there are also problems that the cover film is not easy to tear or tear during tearing. There are two specific reasons:

Firstly, the cover film has two kinds of easy-to-tear type and firm type. The customer selects the corresponding cover film according to the market positioning of the product and the material of the plastic cup when it is used;

Secondly, the use of the cover film's easy-to-tear type has its own characteristics. If the sealing temperature is too high and the pressure is too high, the easy-to-tear type will become a firm type, and it is particularly important to strictly control the conditions of use.