The fresh - keeping box, also known as the modified atmosphere packaging box, is typically crafted from food - grade PP plastic particles through high - temperature molding or injection molding techniques.
The fresh - keeping box, also known as the modified atmosphere packaging box, is typically crafted from food - grade PP plastic particles through high - temperature molding or injection molding techniques. In recent years, with the rapid development and wide application of modified atmosphere packaging machines in China, fresh - keeping box types have found extensive use within the country's food industry. Correspondingly, the procurement demand for consumable fresh - keeping boxes, which serve as their supporting items, has been on the rise.
Food safety has always been a key concern at the national level. Food quality is not only related to the intrinsic materials of the food itself but also closely tied to the packaging of consumables such as fresh - keeping boxes, packaging boxes, packaging bags, and packaging films. Currently, there are specific requirements for PP (polystyrene) materials in food - grade packaging plastic consumables. For instance, in the packaging of products like Zhou Hei Ya's chilled fresh meat, the packaging consumables are mandated to be made of PP materials.
The modified atmosphere packaging for fresh - keeping boxes/fresh - keeping films involves replacing the air inside the box with fresh - keeping gas and then carrying out thermoplastic packaging. This represents the most effective fresh - keeping technology in the realm of food packaging at present. Given that the gas inside the packaging box is in a positive - pressure state, the consumables for modified atmosphere fresh - keeping packaging, namely fresh - keeping boxes/packaging films, must possess high - barrier properties and are made of food - grade PP material.
The "Fresh - Lock" packaging of Zhou Hei Ya essentially pertains to the cooked products of the Zhou Hei Ya brand, including duck webs, duck claws, duck collarbones, and duck wings, which are packaged using modified atmosphere fresh - keeping technology. The consumables required for its fresh - keeping packaging design are as follows: 1. The packaging box, also referred to as the tray; 2. The packaging film, also known as the laminating film. These are commonly known in the industry and among the general public as fresh - keeping boxes, packaging trays, packaging films, composite films, and packaging roll films.
I. Fresh - Keeping Box
The new - generation fresh - keeping box is made entirely of pure PP material and demands high - barrier performance to guarantee that the fresh - keeping gas within the package does not leak.
Dimensions of the new fresh - keeping box: The outer dimensions of the packaging box are generally 20014055mm or 20014035mm.
II. Food Packaging Film
Regarding food packaging film materials, the packaging film usually consists of two - layer structures: pet/pp or pa/pp. Cooked food products such as those from Zhou Hei Ya also necessitate packaging films with high - barrier performance.
2. Styles of Packaging Films
Based on the printing factor, packaging films can be classified into colored films and white films. In terms of the ease of tearing, they can be divided into easy - to - tear films and hard - to - tear films. Considering the anti - fog property, they can be categorized as anti - fog films and non - anti - fog films.
3. Printing on Food - Safety Fresh - Keeping Boxes
The food - safety fresh - keeping box is usually printed in the middle layer, employing benzene - free and environmentally - friendly product materials and printing methods.
III. Customization of Food Packaging Films/Fresh - Keeping Boxes
In response to customers' specific needs, the company offers customization services for packaging boxes/packaging film products. With rich experience in food packaging/packaging film design, the company currently provides over 100 styles of packaging boxes for customers to select from.
The modified atmosphere packaging machine for Zhou Hei Ya's fresh - keeping boxes mainly safeguards the freshness of fruits and vegetables and retards the spoilage of cooked food from three technical perspectives:
The modified atmosphere packaging machine utilizes methods to prevent and eliminate the reproduction and spread of harmful bacteria.
It reduces the aerobic respiration rate of living cells. However, it does not employ vacuuming to avoid triggering anaerobic reactions (with the exception of cooked food, where efforts are made to prevent oxygen deficiency in the packaging box/bag as much as possible).
After the completion of modified atmosphere packaging, the products need to be stored in a cold storage at 0℃ - 4℃. The cold - storage technology can also reduce the activity of living cells within the food products and their aerobic respiration.
