There are many types of food packaging materials, and especially in a variety of functional food packaging film series, its category is more numerous. Today, we will come together to understand what the common food packaging film which.

(1) the general packaging film

Commonly used food packaging films include: PVA coating system isolation film, biaxially oriented polypropylene film (BOPP), biaxially oriented polyester film (BOPET), nylon film (PA), cast polypropylene film (CPP) , Aluminum foil and so on. These films because of its excellent function, good transparency, high tensile strength, with a strong gas barrier function and low production costs, the use of a more extensive.

(2) edible packaging film

Edible packaging film, refers to the edible material, mainly lipid, protein and polysaccharides and other natural macromolecules, add edible plasticizer, crosslinking agent, through the physical effects of blending, through the same processing Technology and the composition of the film. According to its selection of the main material characteristics, edible film can be divided into four categories: carbohydrate edible film, protein edible film, lipid edible film, complex edible film. On the edible function of the film, in the usual life has been widely used, such as the familiar candy packaging on the use of glutinous rice paper, ice cream coated corn baking packaging cup, are typical edible packaging. Compared with the synthetic packaging data, edible film can be biodegradable, without any pollution. With the increase in environmental awareness, edible film in the food packaging category quickly become a hot topic, and achieved certain results.

(3) Antibacterial food packaging film

Antibacterial food packaging film is a kind of control or kill the appearance of bacterial capacity of the functional film. According to the antibacterial way, can be divided into two kinds: direct antibacterial and direct antibacterial. Direct antibacterial antibacterial content through the packaging materials and food directly to complete the anti-bacterial food; and direct antibacterial, mainly in the carrier to increase the number of substances can be adjusted within the micro-environment packaging, or the use of packaging materials to select the permeability of microbial control Growth, such as the atmosphere packaging film.

(4) nano composite packaging film

Nanocomposite films are composite thin films composed of nanometer orders of magnitude (1-100nm), which are characterized by traditional composite materials and modern nanomaterials. Because of the special structure of the nano-composite film due to the appearance of the effect, volume effect, scale effect and other characteristics of their optical function, mechanical function, antibacterial function, isolation function and other aspects of the practice of data do not have the characteristics of its food Packaging has a wide range of use, not only can be satisfied with the extension of the shelf life of the request, but also to monitor the quality of food within the package changes.

(5) degradable packaging film

This film is mainly dealing with some difficult to degrade the packaging material recovery difficult, buried underground will damage the soil structure, combustion treatment will produce toxic gases caused by air pollution problems. According to the principle of degradation, mainly divided into photodegradable packaging film and biodegradable packaging film.

Degradable film because of its characteristics to meet the requirements of environmental protection, and now more extensive research, attention by the majority of seminars. Such as the use of renewable plant capital (such as corn) made of starch material made of polylactic acid (PLA), carbon dioxide and propylene oxide as a material synthesis of environmentally friendly plastic polycarbonate (PPC) and is Chitosan obtained by the deacetylation effect of chitosan, which is widely present in nature.