What structure and how to choose the material for the high-temperature retort pouch?

High-temperature retort pouch with durable packaging, stable storage, anti-bacteria, high-temperature sterilization treatment, and other properties, is a good packaging composite material. So, its structure, material selection, and technology, respectively, what matters to pay attention to? Soonseal Packaging, a specialist flexible packaging manufacturer, will tell you how to choose a material for a high-temperature retort pouch.

In order to meet the performance requirements of a high-temperature cooking bag, the outer layer of the structure chooses polyester film with high strength, the middle layer chooses aluminum foil with shading and air tightness, and the inner layer chooses polypropylene film. Three-layer structure: PET/AL/CPP, PET/PA/CPP two, four-layer structure: PET/AL/PA/CPP. The performance characteristics of different kinds of films are as follows:

1. PET: PET film has mechanical strength, heat resistance, cold resistance, oil resistance, drug resistance, gas resistance, and other properties, the thickness of 12GM can be used, but a lot of domestic polyester film temperature resistance is slightly poor, the flatness of the product is not too stable, bring great difficulties to the operation, resulting in waste.

2. Aluminum foil: aluminum foil has excellent air resistance and moisture resistance, so it is very important to preserve the original taste of food. Strong protective, so that the packaging is not susceptible to bacteria, and mold damage; Stable shape at high and low temperature; Good shading, strong reflection ability to heat and light. Its thickness in 7μm can be used, pinhole as little as possible, aperture as small as possible, and its flatness must be very good, with no oil spots on the surface.

3. Nylon: nylon, as well as good barrier properties and is an odorless, tasteless, non-toxic, and particularly durable thorn, it has a weakness, is not resistant to moisture, so be stored in a dry environment, once the water absorption, its performance index of each drop, the thickness of the nylon in 15 gm can be used, in the composite, it is best to use double film processing, if not double film processing, The untreated surface should be compound with aluminum foil to ensure compound fastness.

4. Polypropylene
High-temperature spout pouch lining material polypropylene film, not only for its good flatness, and its tensile strength, heat sealing strength, resistance to impact strength, elongation at break is strict, only a handful of domestic product can be used, but the effect than imported raw materials, its thickness in 60 ~ 70 gm, surface treatment value in more than 40 Dyn.

Guangdong Soonseal Packaging Technology Co. Ltd is a leading manufacturer founded in 2001 and special for all kinds of package solutions, We have an Alibaba site certified factory located in Foshan, only 1 hour from Guangzhou. Any interested in our high-temperature retort pouch, Please feel free to contact us.