The puncture resistance of suction bag should be considered as the key point of packaging material combination
Food vacuum packaging design. If the net content or volume of the contents exceeds the bearing range of the soft packaging materials used, in the process of transportation or sales circulation, a little external force will lead to bag breakage and cracking. Generally, the thickness of the material shall not be less than 50 μ m as the heat sealing layer of vacuum packaging bag.
The quality of food vacuum packaging materials. The quality problems of packaging materials lead to the sealing cracking of the finished product packaging, which are generally concentrated in the following aspects: 1) the physical and mechanical properties of food packaging, such as breaking force and elongation, puncture resistance, pendulum impact resistance, peel strength, etc., can be used to comprehensively judge whether the physical and mechanical properties such as toughness, puncture resistance and impact resistance of packaged bags meet the packaging and storage requirements Requirements of stacking and transportation process. (related to the contents, the size of the package, the transportation route and the packaging form) ② the tightness of the food packaging, such as the burst pressure test, can determine the location where the bag is broken and the part with weak mechanical strength. For example, the heat sealing strength test can judge whether the heat sealing strength meets the requirements of food contents, and determine the parts with poor heat sealing and the uniformity of heat sealing effect. For example, the vacuum packaging of chicken feet is damaged because the bones of some broken claws are cut very sharp when the chicken feet are cut into pieces. In addition, when the chicken feet are boiled, the meat skin shrinks, so the bones are exposed and the bag is easy to be punctured during transportation.
There are also some reasons: what is the quality of vacuum bag suction bag? Is the thickness of vacuum packaging bag appropriate? Is the size of vacuum packaging bag appropriate? Is the size of outer box appropriate? Most of the air leakage of vacuum packaging bags is caused by the existence of pinholes, which can not be found immediately, and sometimes it does not necessarily appear after 10 days of insulation. Machine problem: sometimes the air leakage of the vacuum bag is not necessarily the problem of the bag, but also the material of the vacuum bag. Is it possible that the bag made of this material can not use the machine you are using now.
Therefore, the puncture resistance of packaging bag should be considered as the key point of packaging material combination. The leakage and sealing strength tester can not only detect the maximum breaking force of the flexible packaging bag, but also test the rupture time of the packaging bag by setting the applied pressure. The stacking structure can be designed according to the test data, and the parameters of the heat sealing process can be further adjusted to improve the packaging effect, or the problems existing in the packaging structure can be analyzed according to the location of the rupture of the flexible packaging bag 。
Packing bag knowledge: suction bag manufacturers tell you how to use plastic bags reasonably
First, try to use less plastic bags for cooked food.
After packaged with plastic bags, cooked food often causes food deterioration. After eating, it is easy to have food poisoning symptoms such as vomiting and diarrhea. In addition, the plastic bag itself will release harmful lifting, which will accumulate in the sealed environment for a long time, and the concentration will increase with the increase of time, thus polluting the food in the bag, affecting human health, especially the healthy development of children.
Second, do not use ultra-thin plastic bags.
Ultra thin plastic bags are light in weight and thin in thickness, but have strong load-bearing capacity. This is because the plastic bag manufacturers have added plasticizer in the production process, which is extremely harmful to human health. The national laws and regulations also prohibit manufacturers from producing and selling ultra-thin plastic bags.
Third, no plastic bags for alcoholic food.
Alcoholic food and oily food will make lead in PVC plastic bag dissolve into food, and this kind of plastic bag can not hold food with temperature above 50 ℃. In addition, consumers should use special food packaging bags to hold food, especially plastic bags with special color, which are likely to be re processed with recycled plastic, and should be firmly avoided for food packaging.
Ordinary plastic bags can't contain food to be heated in the microwave oven. The heating of plastic bags is easy to produce carcinogens, which is very harmful to human health. Consumers should use special microwave oven to heat the plastic film. http://www.ycritai.cn/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag