For many years, people have been fighting bacteria, especially in food storage and packaging. For example, raw meat has no environmental protection and protection measures, and the shelf life will not exceed 28 days, while the freshness is only guaranteed for 5-7 days. High-barrier stretch film is often used in food packaging. What aspects should be paid attention to in the production of this packaging film?

What are the production factors of food packaging film?

一、Production material

To achieve high barrier, oil resistance, high temperature resistance, low temperature freezing resistance and other characteristics of food high-barrier stretch film, the material selection is undoubtedly crucial! And through the structural combination of materials, the quality, freshness, aroma, and puncture resistance functions of the customized finished packaging of food-type high-barrier stretch film can be achieved.

In order to ensure product performance well, Freda Technology has established a complete and efficient modern enterprise management system and quality management system in accordance with the management standards and national standards of European and American developed countries and domestic food and medical product packaging, and fully realized the informationization of production process tracking. Management system. Most of the raw materials of the products are imported from abroad and have long-term strategic cooperation, such as Dow, DuPont, Shell, BASF, ExxonMobil, etc. Strictly ensure product quality.

二、Production equipment

The production cost of high-barrier stretch films for food is low, and one of the manifestations lies in the production equipment that can achieve large-scale automation of the production of high-barrier stretch films for food. When the food high-barrier stretch film manufacturer completes the full-automatic production of the food high-barrier stretch film from "printing-laminating-slitting", it can not only improve production efficiency, but also save labor costs.

Freda has introduced a complete set of W&H 11-layer, 9-layer and 8-layer co-extrusion cast film equipment production lines imported from Germany. The equipment has a high degree of automation. It combines raw material conveying, proportioning and plasticization into one, and each is controlled by a central computer. The speed of an extruder and the dosing system with an accuracy of up to one thousandth can fully guarantee the stability of the product. The raw material formula can be freely combined. The rich and diverse product structure can meet the needs of various industries and even customized packaging. demand.

Freda Technology's complete technology and equipment, online closed-loop thickness control system, control the vertical and horizontal thickness distribution of the product per meter, and cooperate with the 24-hour QC offline product detection and tracking to ensure the continuous and stable product performance.

The effect of high-frequency wide-surface post-treatment and good flatness of rewinding fully meet the requirements of subsequent processing such as printing and lamination. The perennial constant temperature workshop that meets GMP requirements covers all the processes of realizing the product to ensure that the product is "spotless" and Stable physical properties.

三、Production Process

Food high-barrier stretch films are generally made by blow molding and casting processes.

1、Blow molding

The water is directly in contact with the film surface for cooling, so it can be quickly cooled and spherical stretched. Its flatness is slightly inferior to the casting method, but its transparency is better than that of the casting method. At the same time, spherical stretching has a high barrier to the production of food products. Film ductility has an impact.

2、Casting method

Cooled by the cooling roll, the food-type high-barrier stretched film made has a certain degree of stretching in the longitudinal direction, but no stretch in the transverse direction.

Freda's eleven-layer cast co-extrusion film uses a casting process. The eleven-layer film structure is co-extruded at one time. After forming, the casting process flows down like a waterfall. After passing through a cold water roller, it becomes cold and formed into a plastic film, because the film It has not been stretched before and has good extensibility. It is an ideal stretch machine to form stretched film. It is used in batch food packaging. Compared with traditional vacuum pumping machines, it saves manpower and is more efficient.