Multi-layer co-extrusion high barrier technology

Tipack takes the multi-layer co-extruded high-barrier material technology as the core, which can achieve the more better matching of the properties of a variety of different materials, and meet the safety, convenience, nutrition, and delicious needs of food and other packaging. At the same time, Tipack products can solve the problems of solvent residue, high energy consumption, poor strength, poor transparency, etc. caused by traditional multi-processing technology.


The main application fields of Tipack packaging are: fresh meat, prepared food, canned food packaging, capsule drinks, dairy baking, quick-frozen food, cooked food, takeaway, high barrier sheet, etc.

1. The truth of multi-layer co-extrusion

Multi-layer co-extrusion is to melt a variety of different polymer materials at different temperatures and pressures required by each, and then extrude them under the same conditions at the same moment through the same set of molds.

We usually refer to plastic products with a thickness of less than 0.2 mm as plastic films, those with a thickness of 0.2 to 2 mm as Plastic sheets, and those with a thickness greater than 2 mm as plates; according to different structures, they are divided into symmetrical structures (A/ B/A) and asymmetric structures (A/B/C).

Multi-layer co-extruded high barrier Plastic Sheets are mainly used for the forming of PP Tray, including Map Trays and Vsp Trays. If used together with high-barrier Lidding Film and Skin Film, a more durable fresh-keeping effect will be obtained.

2. Multi-layer co-extrusion is a market trend

1. Fat & protein are easy to oxidize and deteriorate, food packaging materials need to have good oxygen resistance;
2. The entry or volatilization of water vapor will easily cause changes in the taste of food, so it needs to have good water resistance;
3. To meet the needs of airtight storage, it also needs to have good heat sealing performance;
4. To prevent microorganisms from destroying food and meet the sterilization requirements, it must have certain heat resistance;
5. To meet the aesthetics of the food and the necessary information display needs, it must have good printability;
6. To protect food and ensure safe handling and transportation, it must have strong mechanical properties;
Some other optical performance requirements, etc...

With the improvement of consumption level, the requirements for food packaging are becoming more and more stringent, which has prompted the development of high-barrier multi-functional packaging materials. The above considerations are based solely on the demand for food packaging effects, and there will be additional requirements for the secondary processability of the packaging materials used. The above requirements cannot be met by a single type of material, and it needs to be met by the combination of multiple functions of different materials.

The initial stage of the development of food packaging materials is the single-layer extrusion state, which is low in cost and poor in technology, and can be seen everywhere in the market;

In recent years, from 3-layer, 5-layer, 7-layer, 9-layer to co-extrusion with even more layers, food packaging materials have been constantly evolving and improving, and product application fields and usage requirements are also constantly expanding;

With the continuous advancement of technology, the attributes of products have also increased, such as heat insulation, oxygen and water resistance, UV protection, etc.;

The superposition of layers is the demand of the development of the times and the future development trend.