Plastic bags, three-sided envelopes, 100-sided envelopes, four-sided envelopes and other styles. Three-sided envelopes are the three sides of the packaging bag. Things are sealed from the top. Four-sided envelopes are perfect products after passing through the production line. Let's learn the difference between three-sided sealed bags and back sealed bags!

1, back seal bag

The back seal bag is also called the peak bag. Simply put, it is a packaging bag with the back of the bag body sealed. The application range of the back seal bag is very wide. Generally, candy, bagged instant noodles, bagged dairy products, etc. all use this packaging form. When packaging rice with a back seal bag, it can ensure the quality of the rice and prevent the rice from getting damp. On the other hand, the back seal bag packaging is not only compact and convenient, the customer's purchase is also beautiful and generous. The weight of the rice in the back seal bag is generally 6~8kg, and the size of the back seal bag is just right, and you can carry it with you.

Back seal bag advantage 1: high precision quantitative filling. Independent small packaging, relying on automatic unmanned packaging, high-precision quantitative charging of the powder, can reach 0.3g. For example, after the use of backpack packaging for probiotics, the backrest stick packaging can well control the amount of solid beverages used. It is no longer just a simple prediction of experience. Eat a pack of probiotics at a time and feed them quantitatively.

Back seal bag advantage 2: easy to carry. The bag sealing tape is easy to carry and avoid secondary waste. Humanized rounded corner design, not easy to scratch. You only need to carry a few simple packages of independent packaging when you go out, so you don't have to worry about the pain of various healthy foods.

Back seal bag advantage 3: ease of use. The unique shape of the backrest rod packaging ensures that the opening is small, easy to control, and not scattered. You only need to rip one end of the ladle. It doesn't matter if you tear it well. The opening is not big. The contents can be easily poured.

Back seal bags mainly include product packaging, food, medicine, cosmetics, frozen food, postal products and other moisture-proof, waterproof, insect-proof,

2. Three-sided sealed bag

There are many reasons why three-sided bags need to use vacuum packaging in many cases. Perhaps to prevent food spoilage or to extend shelf life, vacuum packaging is also often referred to as decompression packaging. The main thing is to pump out the air in the bag and seal it. The bag is always under high pressure.

Not only that, the three-sided bag has low loss, the machine uses prefabricated packaging bags, the packaging bag pattern is perfect, the sealing quality is excellent, and the product grade is improved. The three-sided bag has excellent sealing performance, high barrier, extremely low oxygen permeability and humidity, moisture-proof, anti-fouling, anti-radiation and anti-hatching, strong mechanical performance, bright and practical appearance, non-toxic, and taste in line with national standards. At present, the growth containers used for packaging chemical fertilizers, pesticides, cement, food and other powder and granular products are usually packed in ordinary plastic woven bags and three-sided sealed bags. The clothing weight is about 20kg to 50kg, which is convenient for handling, loading, handling and storage.

Back-sealed bags and three-sided bags are produced with other equipment, but there are also three-sided bags and back-sealed bags dual-purpose machinery and equipment. Because the production procedures between the two are different, there will be some differences in usability. But there is a certain commonality between the two. In other words, it is often used as a packaging bag for food and other products.

The above is the difference between the three-sided seal bag and the back seal bag. If you need to know more, please feel free to contact us!