Teach you to distinguish the difference between the middle seal and the three side seals
There are many different styles of plastic bags, but it can also be understood as simple. Three-side bags are used to seal the three sides of the bag and put things in the top seal. The middle bag is made from the middle to the plastic package. Packaged. Here's a detailed introduction to the difference between a back-sealed bag and a three-sided bag.
1, in the bag
The middle seal bag is also called a back seal bag, and its application range is very wide. General candy, bagged instant noodles, bagged dairy products and the like adopt such a package form.
The packaging of rice is now more and more simple and there are numerous forms of packaging. Many rice bags are getting smaller and smaller, and bags are becoming more and more material. We commonly use large bags and use a small vacuum bag. The use of vacuum bags for packaging rice is also a constant practice and development of the final packaging of vacuum bags in the form of packaging bags of rice.
The use of a sealed bag for packaging rice on the one hand can ensure the quality of rice and prevent moisture from the rice. The weight of the rice packed in the middle seal bag is generally 6 or 8 kilograms, and the size of the middle seal bag is just right.
The middle seal bags can be used as food bags, store foods, medicines, cosmetics, frozen foods, philatelic products, etc., moisture-proof, waterproof, insect-proof, can be reused, sealed tightly with one click, non-toxic and tasteless. Good flexibility, free seal, very convenient.
2, three sides sealed bag
The airtightness of the three-side seals is the best, and the bag-in-bag method is generally used for bagging.
Three-sided envelopes need to be vacuum-packed in many cases. This reason is also very diversified, and sometimes it may be to prevent food spoilage, and sometimes it is to make the shelf life longer. Vacuum packaging is also commonly referred to as decompression packaging. The main task is to extract all the air inside the packaging bag and seal it, so that the interior of the bag is always in a highly decompressed state.
In addition, the use of three-sided packaging materials, low loss, and excellent sealing performance, high degree of barrier, low oxygen permeability, moisture and pollution prevention and radiation protection, mechanical properties, bright appearance and practical, non-toxic, tasteless in line with the country standard.
At present, the best containers used to package chemical fertilizers, pesticides, cement, grain and other powdery and granular products are generally packaged in ordinary plastic woven bags and three-sided sealed bags. The weight of the containers can be approximately 20kg to 50kg. Handling, stacking, handling and storage features.
Sealing bags in production and three-sided sealing bags are produced using different equipment. Due to the different production steps between the two, there are certain differences in the use of the products. Careful customers must choose their own bag.
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