PE special-shaped bag is a polymer organic compound with this structure. We often use special-shaped bags in our daily life.

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

Polyethylene can be regarded as transparent in the film state, but when it is massive, there are a lot of crystals inside, which will cause strong light scattering and opacity. The crystallinity of polyethylene is affected by the number of branches. The more branches, the more difficult it is to crystallize the PE special-shaped bag.

The crystalline melting temperature of PE bag material polyethylene 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 high-density polyethylene in an environment above 130 degrees Celsius Dissolve in xylene to prepare.

The correct choice of special-shaped bags for food packaging can ensure food hygiene.

With the rapid development of the economy and the continuous improvement of the people's level of clothing, food, housing and transportation, the pursuit of food is of course getting higher and higher. From the past, it can only satisfy hunger, to today's pursuit of both color, fragrance and taste. In addition to the fixed three meals a day, people's consumption of snacks is also amazing.

From getting up early to staying up late, people consume a lot of food a day, and they 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 bags for food packaging It is also on the rise. However, many basin friends often make mistakes when buying and using special-shaped bags for food packaging. Today, we will teach you how to get out of the misunderstanding and correctly choose and use special-shaped bags for food packaging.

Application example

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

1. Special-shaped self-standing bag with mouth

The function of adding the mouth is to facilitate the inclination of the contents. The product after adding the mouth can be sealed again, that is to say, it can be unsealed many times. This special-shaped bag is suitable for liquid beverages, shower gel, shampoo, tomato sauce, vegetable oil and other liquids, or other liquid commodities that must be unsealed many times.

2. Special-shaped self-standing bag with zipper

The function of the zipper is to facilitate multiple unsealing applications, but the difference is that the repeated sealing method is the 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, Cookies, crystal jelly, tea, etc.

3. Mouth shaped self-supporting bag

The characteristic of this kind of packaging bag is that there is no additional mouth in the product packaging design, but the manufacturing characteristics of special-shaped bags are used to make a mouth-shaped bag, which is convenient to take. This design is suitable for liquid refill packaging, because once opened, it cannot be sealed again, and the available products are basically the same as the special-shaped self-standing bag with mouth.

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