What are the materials of the packaging bag?
Packaging bags of different materials have different uses, but few people can tell them apart, so let’s take a look at several materials of packaging bags and their main uses.
- Aluminum foil material
The packaging bag made of aluminum foil has strong air barrier performance, high temperature resistance (121°C), low temperature resistance (-50°C), and oil resistance. The use of aluminum foil bags is different from ordinary packaging bags, mainly used for high-temperature cooking and preservation of low-temperature food. However, the aluminum foil packaging bag has no heat sealability due to its fragile material, easy to break, and poor acid resistance. Therefore, it is generally only used as the middle material of the bag, such as the milk packaging bags we drink in our lives, and the quick-frozen food packaging bags will use aluminum foil. - PET material
PET is also called biaxially oriented polyester film. The packaging bag made of this material has good transparency, strong gloss, strength and toughness are also superior to other materials, and it is not easy to break, and it is non-toxic and tasteless, high in safety, and can be used directly. in food packaging. Therefore, in daily life, PET is a non-toxic and sterile packaging material for all kinds of food, medicine, and so on. However, its disadvantages are also obvious, that is, it is not resistant to heat and alkali, and cannot be soaked in hot water. - Nylon
Nylon is also called polyamide. This material is also very transparent, heat-resistant, oil-resistant, puncture-resistant, and soft to the touch, but it is not moisture-resistant and has poor heat-sealing properties. Therefore, nylon packaging bags are mostly used for packaging solid foods, as well as some meat products and steamed foods, such as chicken, duck, ribs, etc., which can extend the shelf life of food. - OPP material
OPP is also called oriented polypropylene, which is the most transparent among the packaging bag materials, and it is also brittle and has little pulling force. Most of the transparent packaging bags used in our life are made of opp materials, which are widely used in clothing, food, printing, cosmetics, printing, paper and other industries.
Five, HDPE material
The full name of HDPE is high-density polyethylene. The bag made of this material is also called P0 bag. It can be used in a wide temperature range. It can be used for frozen food packaging and packaging that can withstand boiling treatment at 100 degrees Celsius. In daily life, it is mostly used in food packaging, grocery shopping bags, and can also be made into a composite film for anti-permeation and thermal insulation packaging films for food. - CPP material
This material has good transparency and higher hardness than PE film. There are many types of it and it has a wide range of uses. It can be used for food packaging, candy packaging, pharmaceutical packaging, etc. It can also be used as the base film of composite materials, and made into composite bags with other films, such as hot filling, steamer bags, aseptic packaging, etc.
The six materials introduced above are some commonly used materials for packaging bags. Each material has different characteristics, and the performance and application scenarios of the packaging bags made of them are also different. We need to choose according to our actual situation.
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