Why are there more composite food packaging bags now
With the increasing demand for plastic flexible packaging, all kinds of color printing composite bags are covering the market according to their inherent characteristics of gorgeous color, novel pattern and convenient use. The original food packaging bag because of its inherent advantages and disadvantages, can not meet the requirements of today's more and more commodities and more demanding food packaging bags. Therefore, it is necessary to combine two or more kinds of films or materials with different properties to learn from each other to fully meet the requirements of food packaging. This kind of bag made of food packaging materials made of multilayer different materials is also called composite bag. Food packaging generally requires the use of composite bags.
Composite bag has excellent barrier performance, excellent pasteurization resistance, cold storage and other characteristics, is the first choice to achieve food packaging. Food packaging bag compound bag can be used for the food packaging of various liquid drinks, such as jelly, sour milk, beverage, jam, etc., or used for the packaging bag of granule and powder foam like food such as milk powder, candy, etc. Food packaging bags are usually printed in copper plate. Inside printing refers to that the ink is printed between two layers of materials. In other words, our food and hands can not touch the ink. This is obviously a guarantee for the safety of food packaging. This is actually one of the advantages of using multilayer composites.
The composition, properties and uses of common composite food packaging bag materials are as follows. Rice snacks: moisture resistance, oil resistance, cold resistance and bag breaking resistance are required; examples of composite films: KPT / PE, OPP / CPP, OPP / PE. (food aluminum foil bag)
Instant noodles: moisture resistance, oxygen resistance, mechanical packaging adaptability, insect resistance, aroma retention; (high temperature cooking bag)
Example of composite membrane: Pt / PE fast food: gas barrier and anticorrosion are required;
Examples of composite membrane: KPT / OPP, PVDC / OPP, KPT / PE / BOPP juice powder: moisture resistance and oxygen resistance are required;
Examples of composite membrane: PRT / PE, KPT / PE, PET / Al / PE, PET / PVDC / PE soybean paste: mildew proof, gas barrier, hot water sterilization resistance are required; examples of composite membrane: on / PVDC / PE, ony / Eval / PE sauces: vacuum degassing, pinhole resistance and antistatic property are required;
Composite film example: OPP / PE, PET / PE laundry liquid packaging bag: required moisture resistance, oxygen resistance;
Examples of composite film: coated with PVDC cellophane / Al / PE ham and sausage: gas barrier, moisture resistance and vacuum gas filling snack bag are required;
Examples of composite films: coated with PVDC cellophane / pepet / PE, PVDC / PET / PE, PVDC / PP / PE tea vacuum bags: moisture resistance, light shielding, gas barrier, fragrance retention, and pinhole resistance are required;
Examples of composite membrane: OPP / Al / PE, PET / PE / paper / Al / PE condiments: gas barrier, aroma retention and oil resistance are required;
Composite film example: NY / PE, PVDC / PET / PE frozen food packaging bags: low temperature sealing and oil resistance are required;
Example of composite film: PA / PE, PET / PE, NY / PE steam sterilization food: long term preservation and heat resistance of 125 ℃ http://www.dgbpk.com/
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