The composite bag is two or more kinds of materials, which are bonded together by machine glue. Because it is multi-layer material, the product has strong puncture resistance and tear resistance. The composite bag can resist cold and high temperature, and can better reflect the value of the product. It has good isolation performance and strong protective performance. It has the characteristics of impermeability of gas and moisture and is not easy to be harmed by bacteria and insects. It has good shape stability and is not affected.
Classification of composite bags and Composite bags include BOPP/CPP composite bags, BOPA6/LDPE composite bags, PET/PE composite bags, and BOPP/CPP composite bags.
BOPP/CPP composite bag has strong moisture-proof ability, good toughness, strong pulling force and strong water and oil resistance; BOPP/CPP composite bag is mainly used in the packaging of cooked food, tea and oily food.
BOPA6/LDPE composite bag is high temperature resistant, non-toxic and tasteless, moisture-proof and oil-resistant, but its transparency is very poor; BOPA6/LDPE composite bag is mainly used in the packaging of cooked food, quick-frozen food and so on, which can be heated, refrigerated and stewed.
PET/PE composite bags have good anti-oxidation performance, moisture-proof, cold-resistant, high transparency, non-toxic and tasteless; PET/PE composite bags are used in all kinds of food packaging, clothing, knitwear, daily necessities packaging; Used as shopping bags, fresh-keeping bags, gift bags, etc.
Features of BOPP/CPP composite bag: high transparency, moisture-proof, oxidation-proof, non-toxic and tasteless, but poor cold resistance and heat resistance; Application: This composite bag is applied to the packaging of all kinds of biscuits, candies, instant noodles and other dry food, and cannot be used to package food with high moisture content, nor can it be used as a refrigerated bag.
Advantages of composite bags:
The "composite bag" has good isolation performance and strong protective performance, and has the characteristics of impermeability of gas and water vapor. Therefore, the blister sealing machine can effectively prevent the contents from moisture absorption and gasification, is not easy to be harmed by bacteria and insects, has good shape stability and is not affected by humidity changes. The "color composite bag" has a variety of different colors, the exquisite composite bag has metallic luster, the filling and sealing machine has a higher reflection ability to heat and light, and the printing color of the composite bag is more exquisite and bright.
Of course, the most important point is to adopt shielding or eluting for partial aluminum plating, which can obtain any pattern and any transparent window. The aluminum foil sealing machine enables customers to see the contents of the package, which is a significant progress in the production technology of "composite bag" and a remarkable feature of "composite bag. Because the basic features like PET/PA/PE or CPPPET/AL/CPPPA/AL/CPPPET/PA0/AL/CPP are a common structure of "composite bag", the outer layer can be printed film
BOPABOPETBOPP the inner layer can be heat sealed film CPPPE, as well as coextrusion film. AL (aluminum foil) is also one of them, which is usually used as the middle layer. According to the requirements, the plastic barrel sealing machine is compounded into a composite film by glue.
