In terms of packaging performance, food packaging requirements can be divided into internal and external parts: internal requirements: internal requirements: the internal requirements of food packaging plastic bags refer to that the packaged food meets the technical requirements in its packaging, so as to reach the shelf life. Strength requirements: it means that the package can keep the food from various external destructive forces during storage, stacking, transportation and handling.
Such as pressure, shock, vibration, etc. There are many factors related to the request for food packaging strength, mainly including transportation mode (such as automobile and aircraft), stacking (such as multi-layer stacking and interspersed stacking) and environment (such as climate and sanitation). Impedance requirements: an important characteristic of food packaging is barrier.
Many foods in storage and packaging, because of its poor barrier, lead to changes in flavor and quality, thus affecting the quality of food. Impedance request is determined by the characteristics of food itself, which has the characteristics of external isolation, internal isolation, selective isolation and so on. The separator includes air, water, grease, light, microorganism, etc.
Ventilation function: some exported foods, such as new fruits and vegetables, still adhere to the respiratory function in the process of packaging and preservation. Therefore, this kind of packaging materials either have the function of ventilation or can control the respiratory function to achieve the purpose of fresh preservation. Nutrition requirements: during the packaging and storage of food, nutrition will gradually lose. Therefore, food packaging should be conducive to the preservation of food nutrition, and nutrition can be locked through packaging.
Food packaging bag 1. Pure plastic packaging bag is suitable for shopping malls, supermarkets, stores, etc. Contact us a lot every day, and we often go shopping in the supermarket. People always put one or two plastic bags behind their backs. Things like market shopping bags are mainly to facilitate shopping and spread business or product information.
Now many companies choose to put the package on the package and make them exquisite, so as to better display their corporate image and have a good use effect at the same time. In addition, plastic bag publicity is frequently used, which is mainly based on the impact of some texts and learning modes on public service advertisements.
You can choose some public logos and advertisements, as well as print quotations. This is not only a kind of mass communication, but also a kind of accumulated energy reserve. For example, the effect of bringing packaging bags into the lives of ordinary people is very obvious. In addition, there are gift bags. It usually includes plastic bags and non-woven bags customized by real estate, banks and other companies.