We can see vacuumed food packaging bags everywhere in our lives. Vacuum bags have their color requirements in terms of material selection and use. Today, I will explain how to choose vacuum bags for food. Ordinary vacuum bags are made of PE single-layer materials. Such bags can be vacuumed, but the vacuum breakage rate and air leakage rate are relatively high, but the cost is low. Many customers choose single-layer PE bags to save costs. Use a vacuum bag.
Good vacuum bags are made of multi-layer composite materials, such as nylon/PE. This is a two-layer composite bag. Such a bag is strong and will not leak air when vacuumed. At present, most food packaging bags are selected Multi-layer composite bags are used as evacuated bags. Different foods should be filled with vacuum bag materials of different thicknesses and properties. For products that are heavy, choose thick materials, and for products that are light, choose thin materials to save costs. Of course, the thicker the material, the higher the cost, but the stronger it will be.
Introduction of commonly used materials for snack food packaging bags
4. Try to choose materials that are not coated or plated. In modern packaging design, in order to make the packaging more beautiful and corrosion resistant, a large number of materials with coating are used. This not only brings difficulties to the recycling and reuse of materials after the product is scrapped. In addition, the coating and plating process also brought great pollution to the environment. For example, paint volatilizes toxic solvent gas, and produces waste liquid containing heavy metals such as chromium and waste residue pollution during electroplating. Therefore, packaging materials that are not coated or plated should be used as much as possible. 5. Choose food to buy in big shopping malls instead of street stalls. 6. Due to the non-degradable characteristics of food packaging bags for food, it will cause environmental pollution. Therefore, when purchasing food, choose green packaging materials. Paper is currently a widely used green packaging material. Therefore, it is advisable to choose original paper packaging when purchasing food. Biodegradable plastics such as PVA and PLA are also available.
It is necessary to ensure that the packaging effect, aesthetics, and economy of various foods can be achieved. At the same time, food vacuum packaging also has higher requirements on the light barrier and stability of the material. After the vacuum packaging bag is vacuumed, the number of microorganisms is less than that of aerobic packaging, and it is not easy to breed. It can smoothly extend the shelf life of some foods such as fresh meat or other packaging materials, which means that the shelf life of vacuum packaging bags is longer. Ordinary plastic bags are longer; vacuum packaging bags can take advantage of the barrier properties of the substrate to achieve high barriers-water, oxygen, and gas barrier effects; vacuum packaging bags can also be used for packaging electronic products, which can be moisture-proof; packaging Some foods can be resistant to oil and aroma, or can be resistant to high-temperature cooking and low-temperature refrigeration. Vacuum packaging bags generally have a high barrier: the high barrier properties of different plastic materials are used to co-extrude the film to achieve high barrier effects on oxygen, water, carbon dioxide, and odors. Stable performance: oil resistance, moisture resistance, low temperature freezing resistance, quality, freshness, and odor.
Eight-side sealing bags are also the main choice for snack food packaging. In response to the continuous development of our times, the demand for this eight-side sealing bag is increasing. Because people's consumption concepts are constantly changing, and people's pursuit of quality of life is constantly improving. As far as we are talking, the eight-side sealing bag is also one of the very important styles of many food packaging in recent years. Speaking of which, what is an eight-side sealing bag? What are the manufacturing methods of the eight-side seal? Answer: As the name implies, the eight-side sealing bag has eight sealing sides, four sealing sides at the bottom and two sides on each side. This bag type is a new type of bag that has emerged in the past two years. The bottom of the eight-side sealing bag is the same as the traditional upright bag and self-supporting bag. Or standing bags are completely different. The difference is that the bottom of the flat-bottom bag is very flat and does not have any heat-sealed edges. This is the eight-sided seal. Simple and straightforward is that the eight-sided sealing is the eight-sided sealing bag. In fact, in our lives: eight-side seal bags are also called eight-side seal zipper bags, eight-side seal upright bags, and square bottom bags.