Healthy life, hold the quality of food packaging

Food packaging is closely related to our health, because food packaging is a plastic product which is in direct contact with food, so the quality is particularly important. Here is a brief talk about how to control the quality of food packaging bags by Dreamfly Printing Co., Ltd., a customized food packaging manufacturer.

1. Quality Input Control of Food Packaging Raw Materials

The quality of raw materials for food packaging, as an important input of product quality, directly affects the quality of processing procedures. For example, the quality of ink in printing process, the surface wetting tension of plastic film, the quality of adhesives and solvents in dry composite process, the friction coefficient and surface wetting tension of film in aluminium plating process, etc.

2. Production Process Control of Food Packaging Process

According to the key quality characteristics of food products, the key processes are determined, and the production process control of key processes is strengthened. For example, printing, extrusion compound and dry compound are the key processes, and the equipment and devices of the key processes such as speedometer and thermometer are effectively controlled. Specific control methods are periodic testing equipment, periodic calibration of instruments, periodic maintenance and maintenance of equipment, depending on the normal operation of equipment to ensure product quality. To achieve the "three definitions" of key processes, i. e. appointment of personnel, process and equipment. Sampling of food packaging bags before printing, and recording the process parameters such as ink viscosity, formulation and proportion, drying box temperature, speed, etc. in the printing process.

3. Doing a Good Record of Food Packaging Production

Sample preparation was carried out before dry compounding of food packaging. The binder ratio, mesh roll number, three-stage drying temperature and speed were recorded in dry compounding process. Record the speed, pressure and peeling strength of extrusion compound process. First piece inspection and itinerant inspection when printing and extrusion are combined. Isolated storage of non-conforming products and identification are provided to prevent the flow of people into the next process.

4. Control of Key Quality Characteristics of Food Packaging by Process Control Chart

For example, according to the regularly collected data reflecting the key quality characteristics of food packaging bags, such as the thickness of aluminium coating film, oxygen permeability of high barrier packaging bags, water vapor permeability and surface resistivity of anti-static packaging materials, the process control chart is drawn according to the collected data and time to realize the monitoring of the production process.