types of food packaging pouches,wholesale cosmetic packaging bags
With the advancement of people's living standards, people's requirements for food quality are getting increasingly higher. Types of food packaging pouches are emerging, as the direct outer packaging of food maintenance-the safety of food pouches has also attracted more and more attention from the world.
Food packing pouches are not only required to be beautiful and easy to carry, but more importantly, to improve quality to ensure food safety. This puts forward higher requirements for the function of food packaging materials, whether they are green or not, and the production planning and production process of the packaging.
Material of food packaging pouches
The plastic food bags we use daily are mainly polyester, polyethylene, polypropylene, polystyrene, polyvinyl chloride, etc. Among them, polyethylene and polypropylene are safe plastics that can be used to hold food. Most PVC bags are poisonous and cannot be used to pack food. Because the unpolymerized vinyl chloride monomer in the polyvinyl chloride resin is harmful to the human body. Moreover, in the process of processing polyvinyl chloride resin into plastic bags, it also participates in some toxic auxiliary materials such as plasticizers and pigments. The main component of plastic stabilizers is lead stearate, which is also toxic. This kind of lead salt is very easy to separate, once it enters the human body, it will form a deposit lead poisoning.
So, how to tell if plastic food bags are poisonous? There are several detection methods for your use.
✨ Nice tips for you
Non-toxic plastic bags are milky white, translucent, or colorless and transparent, flexible, smooth when touched, and waxy on the outside; toxic plastic bags are cloudy or light yellow in color and sticky to the touch.
Water testing method
Put the plastic bag in the water and press it into the bottom of the water. The non-toxic plastic bag has a small specific gravity and can surface, while the toxic plastic bag has a large specific gravity and sinks.
Tremor detection method
Grab one end of the plastic bag and shake it vigorously, declaring that those with loud voices are non-toxic; those with dull voices are toxic.
Fire detection method
The non-toxic polyethylene plastic bag is flammable, the flame is blue, the upper end is yellow, and it drips like candle tears when it burns, has a paraffin smell, and emits less smoke; the toxic PVC plastic bag is not flammable, and it goes out immediately after leaving the fire. The flame is yellow, the bottom is green, softening and drawing silk, announcing the pungent taste of hydrochloric acid.
Hope these methods can help your judgment, if you need related products, you can consider us. SHANTOU HONGQIAO PACKAGING INDUSTRY CO., LTD. is one of the leading types of food packaging pouches,wholesale cosmetic packaging bags supplierss, welcome to contact us.