Chemical properties of PE special-shaped bag materials

PE special-shaped bags are polymer organic compounds with this structure. PE special-shaped bags are often used in our daily lives.

PE is one of the commonly used polymer materials in daily life. It is widely used in making special-shaped bags, plastic films, milk buckets, etc. Polyethylene is resistant to various organic solvents and acid and alkali corrosion, but is not resistant to oxidizing acids, such as nitric acid. Ethylene will be oxidized in an oxidizing environment.

Polyethylene can be considered transparent in its film state, but when it is in block form, there are a large number of crystals inside, which will cause strong light scattering and opacity. The crystallinity of polyethylene is affected by the number of its branches, the more branches there are , the harder it is for PE special-shaped bags to crystallize.

The crystallization and melting temperature of polyethylene, the material of PE bags, is also affected by the number of branches, ranging from 90 to 130. The more branches, the lower the melting temperature. Polyethylene single crystals can usually be processed by high-density polyethylene in an environment above 130 degrees Celsius. Ethylene is prepared by dissolving it in xylene.

Correctly choosing special-shaped bags for food packaging can ensure food hygiene

With the rapid development of the economy and the continuous improvement of people's level of food, clothing, housing and transportation, the pursuit of delicious food is of course getting higher and higher. In the past, it was just to satisfy hunger, but now it has become the pursuit of color, fragrance and taste. In addition to the fixed three meals a day, In addition to meals, people’s consumption of snacks is also amazing.

From early in the morning to staying up late, people consume a lot of food in a day. You can often see special-shaped bags for food packaging. In addition, as more and more people fall in love with baking and cooking, the number of individual buyers of special-shaped food packaging bags also increases. On the rise, however, many friends often make misconceptions when purchasing and using food packaging special-shaped bags. Today, we will teach you how to get rid of the misunderstandings and correctly choose and use food packaging special-shaped bags.

Application examples

According to different methods, the key points of special-shaped bags can be divided into the following categories:

1. Special-shaped stand-up bag with mouth

The function of the spout is to facilitate the tilting of the contents. The product after adding the spout can be sealed again, which means that it can be unsealed multiple times. This special-shaped bag is suitable for liquid drinks, shower gel, shampoo, ketchup, vegetable oil and other liquids, or Other liquid products that must be opened multiple times.

2. Special-shaped stand-up bag with zipper

The function of a zipper is to facilitate multiple unsealing applications, but the difference is that the repeated sealing method is a zipper, so this design is not suitable for sealing liquids and is only used for some light and dry items, such as lollipops, nuts, chocolates, and biscuits. , crystal jelly, tea, etc.

3. Mouth-shaped stand-up bag

The characteristic of this kind of packaging bag is that there is no extra mouth in the product packaging design. Instead, the manufacturing characteristics of special-shaped bags are used to make a mouth-shaped bag for easy access. This design is suitable for liquid refill packaging because once it is opened It can no longer be sealed, and the available products are basically the same as special-shaped stand-up bags with mouths.

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